CN113041844A - Reverse osmosis automatic cleaning device and method - Google Patents

Reverse osmosis automatic cleaning device and method Download PDF

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Publication number
CN113041844A
CN113041844A CN202110474683.4A CN202110474683A CN113041844A CN 113041844 A CN113041844 A CN 113041844A CN 202110474683 A CN202110474683 A CN 202110474683A CN 113041844 A CN113041844 A CN 113041844A
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cleaning
electric valve
pump
pipeline
water
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Inventor
顿小宝
刘世雄
王涛
张瑞祥
令彤彤
牛利涛
李长海
郭云飞
张林涛
赵如宇
陈余土
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Priority to CN202110474683.4A priority Critical patent/CN113041844A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/162—Use of acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/164—Use of bases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/168—Use of other chemical agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/40—Automatic control of cleaning processes

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

An automatic reverse osmosis cleaning device and a method thereof comprise a flushing equipment unit, an operation equipment unit, a cleaning equipment unit, a reverse osmosis component unit and a controller; the flushing equipment unit comprises a water production tank, the water production tank is connected with a reverse osmosis flushing water inlet pipeline through a flushing pump, and the reverse osmosis flushing water inlet pipeline is connected with a reverse osmosis component unit; the operation equipment unit comprises an operation water inlet pipeline, and the operation water inlet pipeline is used for providing water inlet when reverse osmosis is in an operation state; the cleaning equipment unit comprises a cleaning box, a dosing pump for feeding corresponding amount of medicine into the cleaning box is arranged on the cleaning box, one path of an outlet of the cleaning box is a recirculation system, and the other path of the outlet of the cleaning box is connected to the reverse osmosis component unit; a first section of water production pipeline and a second section of water production pipeline of the reverse osmosis component unit are combined into a pipeline which is connected to the water production tank; the controller is used for controlling each unit system. The invention can realize the monitoring of technical indexes under the reverse osmosis operation working condition and automatically carry out corresponding chemical cleaning.

Description

Reverse osmosis automatic cleaning device and method
Technical Field
The invention relates to the technical field of water treatment in the energy and power industry, in particular to a reverse osmosis automatic cleaning device and method.
Background
The reverse osmosis device is common equipment of a boiler feedwater treatment system of a power plant, and can achieve a good desalting effect. Along with the operation of the device, the pollution types including microbial pollution, organic matter pollution, colloid pollution, inorganic salt pollution and the like are easy to appear, and the deterioration of the operation working condition of the equipment is caused, mainly including the reduction of water yield, the increase of pressure difference, the increase of salt permeability and the like. The common pollution types can remove the pollutants by a chemical cleaning method and recover the operation indexes of the equipment.
Chemical cleaning of power plant reverse osmosis units typically presents the following problems.
The first is a determination index of whether or not chemical cleaning is required, which operation index should be used. The reverse osmosis device has a large number of operation indexes, and most of the indexes can not be directly used as judgment indexes for judging whether chemical cleaning is needed or not and need to be used as bases after conversion analysis. If these indicators cannot be determined, the response of the chemical cleaning is delayed, and the accumulation of contaminants causes serious pollution.
Secondly, the pollution type is determined, and how to judge the type of the pollutant through the change of the operation index. The judgment of the types of part of power plant pollutants is not accurate enough, so that the chemical cleaning effect is poor, and the operation indexes cannot be completely recovered. Or a complete set of chemical cleaning is directly adopted, so that the waste of medicines and water resources is caused, the operation cost is increased, and even the damage of the reverse osmosis membrane can be caused.
Third, the reverse osmosis chemical cleaning generally comprises the cleaning steps of cleaning preparation, dispensing, opening and closing of a valve and starting and stopping of equipment, establishment of circulation, soaking of medicines, flushing and the like, which are all manual operations, the period is long, the labor cost is high, the problems of operation errors, improper index control and the like are easy to occur, and the cleaning effect is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a reverse osmosis automatic cleaning device and a reverse osmosis automatic cleaning method, which can realize the monitoring of technical indexes under the reverse osmosis operation working condition, automatically judge the chemical cleaning conditions, automatically judge the pollutant types and automatically perform corresponding chemical cleaning. The system has the characteristics of simple structure, high integration level, no additional space, accurate judgment, timely response, high automation degree and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
an automatic reverse osmosis cleaning device comprises a flushing equipment unit, an operation equipment unit, a cleaning equipment unit, a reverse osmosis component unit and a controller 501;
the flushing equipment unit comprises a water production tank 101, the output end of the water production tank 101 is connected with a reverse osmosis flushing water inlet pipeline 105 through a flushing pump 102, and the reverse osmosis flushing water inlet pipeline 105 is connected with a reverse osmosis assembly unit and used for performing low-pressure flushing on the reverse osmosis assembly unit;
the operation equipment unit comprises an operation water inlet pipeline 206, the operation water inlet pipeline 206 is used for providing water inlet when reverse osmosis is in an operation state, concentrated water is discharged into a trench, and produced water is recycled to the water production tank 101;
the cleaning equipment unit comprises a cleaning box 310, a dosing pump for feeding corresponding amount of medicine into the cleaning box 310 is arranged on the cleaning box 310, one path of an outlet of the cleaning box 310 is a recirculation system, and the other path of the outlet of the cleaning box 310 is connected to the reverse osmosis component unit;
the reverse osmosis component unit comprises a first-section membrane component 404 and a second-section membrane component 409, wherein the first-section membrane component 404 is connected with a first-section water production pipeline 405, the second-section membrane component 409 is connected with a second-section water production pipeline 410, and the first-section water production pipeline 405 and the second-section water production pipeline 410 are combined into a pipeline which is connected to the water production tank 101;
the controller 501 is used for controlling each unit system.
A flushing pump pressure gauge 103 and a flushing pump outlet manual valve 104 are arranged between the flushing pump 102 and the reverse osmosis flushing water inlet pipeline 105, and a reverse osmosis flushing water inlet electric valve 106 is arranged on the reverse osmosis flushing water inlet pipeline 105.
The operation water inlet pipeline 206 is provided with a high-pressure pump 201, a high-pressure pump pressure gauge 202, a high-pressure pump outlet manual valve 203, a high-pressure pump outlet electric valve 204 and an operation cartridge filter 205.
The cleaning equipment unit comprises an acid metering tank 301, an alkali metering tank 304, a reducing agent metering tank 307, an acid liquid outlet pipeline 302, an alkali liquid outlet pipeline 305 and a reducing agent liquid outlet pipeline 308 which are respectively connected with a cleaning tank 310, wherein an acid dosing pump 303, an alkali dosing pump 306 and a reducing agent dosing pump 309 are sequentially arranged on the liquid outlet pipelines.
The inside of the cleaning box 310 is provided with an electric heater 311, a cleaning box pH meter 323, a cleaning box thermometer 324 and a cleaning box liquid level meter 325, an overflow pipeline 312 is arranged at the high part of the cleaning box 310, a sewage discharge pipeline 313 is arranged at the bottom of the cleaning box 310, and a sewage discharge electric valve 314 is arranged on the sewage discharge pipeline 313.
A cleaning pump 315, a cleaning pump pressure gauge 316 and a cleaning pump outlet manual valve 317 are sequentially arranged at the outlet of the cleaning tank 310; the pipeline is divided into two branches after cleaning the manual valve 317 of the pump outlet, one branch is the recirculation pipeline 319 connected to the cleaning tank 310, the recirculation pipeline 319 is provided with the electric valve 318 of the recirculation pipeline, the other branch is the cleaning water inlet pipeline 322 connected to the reverse osmosis component unit, the cleaning water inlet pipeline is sequentially provided with the cleaning safety filter 320, the electric valve 321 of the cleaning water inlet pipeline is provided with the cleaning tank water replenishing pipeline 327 connected with the flushing pump 102 and the cleaning tank 310, the water replenishing pipeline 327 is provided with the electric valve 326 of the cleaning tank water replenishing, the water replenishing pipeline 327 is connected with the reverse osmosis component unit and the water production return pipeline 329 of the cleaning tank 310, the electric valve 328 of the water production return pipeline is provided with the water production return pipeline, the cleaning tank 310 is provided with the concentrated water return pipeline 331, and the electric valve 330 of the concentrated water return pipeline 331 is provided with the.
The water production end of the first section of membrane component 404 is a first section of water production pipeline 405, the first section of water production pipeline 405 is provided with a first section of water production flow measuring point 406, the concentrated water end of the first section of membrane component 404 is an intersegment pipeline 407, the intersegment pipeline 407 is provided with an intersegment pressure measuring point 408, the intersegment pipeline 407 is connected with a second section of membrane component 409, one path of the water production end of the second section of membrane component 409 is connected with a water production discharge pipeline 421, the water production discharge pipeline 421 is provided with a water production discharge pipeline electric valve 422, the other path is connected with a second section of water production pipeline 410, the second section of water production pipeline 410 is connected with a second section of water production flow measuring point 411, the first section of water production pipeline 405 and the second section of water production pipeline 410 are combined into a pipeline which is connected with the water production tank 101, the pipeline is provided with a produced water conductivity measuring point 419, a produced water pressure measuring point 420, the concentrated water runs through the pipeline electric valve 414, the concentrated water flushing electric valve 415 and the concentrated water runs through the manual valve 416.
An operation method of a reverse osmosis automatic cleaning device comprises the following steps;
when the reverse osmosis normally operates, the controller 501 monitors various operation indexes of the reverse osmosis, an operator firstly inputs a reference value of data at a standard temperature in the controller 501, and determines whether cleaning is needed and the type of pollutants by comparing real-time data during the reverse osmosis operation with the reference value;
the controller 501 divides the reverse osmosis fouling and blocking conditions into 6 types according to different changes of reverse osmosis operation indexes, and adopts different cleaning modes aiming at the following 6 different types;
in the 1 st case, the flow rate of produced water is reduced by more than 10% compared with the reference value, the flow rate is taken as a main change index, the first-stage pressure difference, the second-stage pressure difference and the salt transmittance have no obvious change, the case is generally organic pollution and microbial pollution, and the recovery can be realized by alkali washing and acid washing;
in the 2 nd case, the produced water flow is decreased by more than 10% compared with the reference value, which is the main change index, meanwhile, the salt transmittance is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the first-stage produced water flow decrease proportion is higher than 15% of the second-stage produced water flow decrease proportion, which is generally metal oxide pollution, and the metal oxide pollution is recovered by cleaning with a reducing agent;
in the 3 rd case, the water production flow rate is decreased by more than 10% compared with the reference value, which is the main change index, meanwhile, the salt permeability is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the decrease proportion of the first-stage water production flow rate is basically equal to that of the second-stage water production flow rate. This condition is typically colloidal contamination and can be recovered by alkaline washing;
in the 4 th case, the water production flow rate is decreased by more than 10% from the reference value, which is the main change index, and simultaneously the salt permeability is increased by more than 3% from the reference value, the first-stage pressure difference is increased by more than 5% from the reference value, and the decrease proportion of the water production flow rate in the second stage is higher than 15% of the decrease proportion of the water production flow rate in the first stage. This condition is typically inorganic salt scaling, which can be recovered by acid washing;
in the 5 th case, the produced water flow is reduced by more than 10% compared with the reference value, which is the main change index, and meanwhile, the salt transmittance is reduced by more than 2% compared with the reference value, and the first-stage pressure difference and the second-stage pressure difference have no obvious change, which is organic pollution and can be recovered by alkali washing and acid washing;
in the 6 th case, the pressure difference in the first stage is increased by more than 15% from the reference value, which is the main change index, and the water production flow is slightly decreased by more than 5% from the reference value, and the pressure difference in the second stage and the salt permeability are not obviously changed, which is the microbial contamination and is recovered by alkaline washing.
When the condition triggered by the situation 1 is met, the controller 501 gives a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, a cleaning process of alkali cleaning and acid cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501, firstly, the alkali cleaning process is carried out, the first step is dispensing, the cleaning box water replenishing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, the cleaning box water replenishing electric valve 326 is closed, the electric heater 311 is started, when the cleaning box temperature gauge 324 reaches 30 ℃, the electric heater 311 is stopped, the recirculation pipeline electric valve 318 is opened, the cleaning pump 315 is started, circulation is started and medicine is prepared, the alkali dosing pump 306 is started, the medicine is added into the cleaning box 310, the cleaning liquid is fully mixed through circulation, when the cleaning box pH meter 323 reaches 12, at this point, the drug concentration is about 0.1%, and the base dosing pump 306 is stopped; in the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 60 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The cleaning tank water replenishing electric valve 326 is opened, the washing pump 102 is started, when the cleaning tank 310 reaches a preset high liquid level, the washing pump 102 is stopped, and the cleaning tank water replenishing electric valve 326 is closed; the electric heater 311 is started, and when the temperature of the cleaning tank thermometer 324 reaches 20 ℃, the electric heater 311 stops; the cleaning pump 315 is started, a small amount of cleaning liquid remained in the reverse osmosis is cleaned by using the cleaning water in the cleaning tank 310, and the cleaning time is 30 minutes; the above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed; and finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops to exceed 2 ℃, the controller 501 controls the electric heater 311 to start until the temperature returns to the cleaning temperature; when the pH value is reduced to be more than 0.5, the controller 501 controls the alkali dosing pump 306 to be started until the pH value is restored to the cleaning value;
after the alkaline washing is finished, performing an acid washing process, dispensing in the first step, opening a washing tank water replenishing electric valve 326, starting the washing pump 102, stopping the washing pump 102 when the washing tank 310 reaches a preset high liquid level, and closing the washing tank water replenishing electric valve 326; the electric heater 311 is started, and when the temperature of the cleaning tank thermometer 324 reaches 45 ℃, the electric heater 311 stops; the recirculation line electric valve 318 is opened, the cleaning pump 315 is started, circulation is started, and medicine is ready to be fed; starting an acid dosing pump 303, adding a medicine into the cleaning tank 310, and fully mixing the cleaning liquid through circulation; when the pH meter 323 of the cleaning box reaches 2, the concentration of the medicine is about 0.2%, and the acid dosing pump 303 is stopped;
in the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. Thirdly, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid; the soaking time is controlled for 2 to 15 hours and can be manually set through the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 15 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The cleaning tank water replenishing electric valve 326 is opened, the washing pump 102 is started, when the cleaning tank 310 reaches a preset high liquid level, the washing pump 102 is stopped, and the cleaning tank water replenishing electric valve 326 is closed; the electric heater 311 is started, and when the temperature of the cleaning tank thermometer 324 reaches 20 ℃, the electric heater 311 stops; the cleaning pump 315 is started, a small amount of cleaning liquid remained in the reverse osmosis is cleaned by using the cleaning water in the cleaning tank 310, and the cleaning time is 30 minutes; the above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed; finishing reverse osmosis alkali washing; wherein in the first step, the second part and the fourth step, the temperature drop and the pH value rise of the cleaning solution can occur; when the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH rises above 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH returns to the purge value. After the alkali washing and acid washing processes, the chemical cleaning of the 1 st situation is completed.
When the condition triggered by the 2 nd condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is stopped and is confirmed by the manual operation of an operator, the cleaning process of the reducing agent is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501; first step, dispensing, wherein the cleaning tank water replenishing electric valve 326 is opened, the washing pump 102 is started, when the cleaning tank 310 reaches a preset high liquid level, the washing pump 102 is stopped, and the cleaning tank water replenishing electric valve 326 is closed; the electric heater 311 is started, when the temperature of the cleaning tank thermometer 324 reaches 30 ℃, the electric heater 311 is stopped, the electric valve 318 of the recirculation pipeline is opened, the cleaning pump 315 is started, circulation is started and medicine is prepared to be fed, the reducing agent dosing pump 309 is started, medicine is added into the cleaning tank 310, and the cleaning liquid is fully mixed through circulation. When the cleaning tank pH meter 323 reaches 5, the concentration of the drug is about 1%, and the reducing agent dosing pump 309 is stopped; and in the second step, small circulation is performed, the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the electric valve 318 of the recirculation pipeline is closed, and the liquid medicine is brought into reverse osmosis for circulation, wherein the circulation time is 20 minutes. Thirdly, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 60 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The water replenishing electric valve 326 of the cleaning box is opened, the washing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the washing pump 102 is stopped, the water replenishing electric valve 326 of the cleaning box is closed, the electric heater 311 is started, when the temperature 324 of the cleaning box reaches 20 ℃, the electric heater 311 is stopped, the washing pump 315 is started, a small amount of cleaning liquid remained in the reverse osmosis is washed clean by using the washing water in the cleaning box 310, and the washing time is 30 minutes; the above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH value rises above 0.3, the controller 501 controls the reducing agent dosing pump 309 to start until the pH value returns to the cleaning value, and after the reducing agent cleaning process, the chemical cleaning of the case 2 is completed.
When the condition triggered by the 3 rd condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of alkaline cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501; the first step is dispensing, the cleaning box water replenishing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, the cleaning box water replenishing electric valve 326 is closed, the electric heater 311 is started, when the cleaning box thermometer 324 reaches 30 ℃, the electric heater 311 is stopped, the recirculation pipeline electric valve 318 is opened, the cleaning pump 315 is started, circulation is started, and medicine feeding is prepared. Starting the alkali dosing pump 306, adding the medicine into the cleaning tank 310, and fully mixing the cleaning liquid through circulation, wherein when the pH meter 323 of the cleaning tank reaches 12, the concentration of the medicine is about 0.1%, and the alkali dosing pump 306 is stopped; in the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; and step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2 to 15 hours and can be manually set through the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 60 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, after completely discharging cleaning liquid in the cleaning tank, closing the blowdown electric valve 314, opening the cleaning tank water replenishing electric valve 326, starting the flushing pump 102, and stopping the flushing pump 102 and closing the cleaning tank water replenishing electric valve 326 when the cleaning tank 310 reaches a preset high liquid level. The electric heater 311 is started, when the temperature of the cleaning tank thermometer 324 reaches 20 ℃, the electric heater 311 is stopped, the cleaning pump 315 is started, a small amount of cleaning solution remained in the reverse osmosis is cleaned by using the cleaning water in the cleaning tank 310, the cleaning time is 30 minutes, the above cleaning steps are repeated for 2 times, the cleaning effect is ensured, the cleaning pump 315 is stopped after the cleaning is finished, the electric valve 328 of the produced water return liquid pipeline is closed, the electric valve 330 of the concentrated water return liquid pipeline is closed, the electric valve 321 of the cleaning water inlet pipeline is closed, and the reverse osmosis alkali cleaning is finished, wherein in the first step, the second step and the fourth step, the temperature drop and the pH value drop of the cleaning solution can occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH drops above 0.5, the controller 501 controls the base dosing pump 306 to start until the pH returns to the purge value. After the above alkaline cleaning process, the chemical cleaning of the 3 rd case is completed.
When the condition triggered by the 4 th condition is met, the controller 501 gives a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of acid cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501, the first step is to dispense the medicine, the water replenishing electric valve 326 of the cleaning box is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, the water replenishing electric valve 326 of the cleaning box is closed, the electric heater 311 is started, when the temperature 324 of the cleaning box reaches 45 ℃, the electric heater 311 is stopped, the recirculation pipeline electric valve 318 is opened, the cleaning pump 315 is started to start circulation and prepare medicine feeding, the acid medicine feeding pump 303 is started, the medicine is added into the cleaning box 310, and the cleaning liquid is fully mixed through circulation. When the pH meter 323 of the cleaning box reaches 2, the concentration of the medicine is about 0.2%, and the acid dosing pump 303 is stopped; the second step is a small cycle, the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the electric valve 318 of the recirculation pipeline is closed, the liquid medicine is brought into reverse osmosis for circulation, the cycle time is 20 minutes, the third step is soaking, the cleaning pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, the electric valve 321 of the cleaning water inlet pipeline is closed, the reverse osmosis pollutants are soaked by the cleaning liquid, the soaking time is controlled for 2-15 hours, and the time can be manually set by the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 15 minutes; step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, after completely discharging the cleaning liquid in the cleaning tank, closing the blowdown electric valve 314, opening the cleaning tank water replenishing electric valve 326, starting the flushing pump 102, stopping the flushing pump 102 when the cleaning tank 310 reaches a preset high liquid level, and closing the cleaning tank water replenishing electric valve 326; the electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started, a small amount of cleaning liquid remained in the reverse osmosis is cleaned by using the cleaning water in the cleaning tank 310, and the cleaning time is 30 minutes; the above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed; and finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, the temperature drop and the pH value rise of the cleaning solution can occur; when the temperature drops to exceed 2 ℃, the controller 501 controls the electric heater 311 to start until the temperature returns to the cleaning temperature, and when the pH value rises to exceed 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH value returns to the cleaning value. After the above acid washing process, the chemical cleaning of the 4 th case is completed.
When the condition triggered by the 5 th situation is met, the controller 501 gives a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, a cleaning process of alkali cleaning and acid cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501, firstly, the alkali cleaning process is carried out, the first step is dispensing, the cleaning box water replenishing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, the cleaning box water replenishing electric valve 326 is closed, the electric heater 311 is started, when the cleaning box temperature gauge 324 reaches 30 ℃, the electric heater 311 is stopped, the recirculation pipeline electric valve 318 is opened, the cleaning pump 315 is started, circulation is started and medicine is prepared, the alkali dosing pump 306 is started, medicines are added into the cleaning box 310, the cleaning liquid is fully mixed through circulation, when the cleaning box pH meter 323 reaches 12, at this point, the drug concentration is about 0.1%, and the base dosing pump 306 is stopped; step two, small circulation, namely opening an electric valve 328 of a produced water liquid return pipeline, opening an electric valve 330 of a concentrated water liquid return pipeline, opening an electric valve 321 of a cleaning water inlet pipeline, closing an electric valve 318 of a recirculation pipeline, and bringing liquid medicine into reverse osmosis for circulation, wherein the circulation time is 20 minutes; thirdly, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 60 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, after completely discharging the cleaning liquid in the cleaning tank, closing the blowdown electric valve 314, opening the cleaning tank water replenishing electric valve 326, starting the flushing pump 102, stopping the flushing pump 102 when the cleaning tank 310 reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve 326, starting the electric heater 311, stopping the electric heater 311 when the cleaning tank thermometer 324 reaches 20 ℃, starting the cleaning pump 315, flushing a small amount of residual cleaning liquid in the reverse osmosis by using the flushing water in the cleaning tank 310 for 30 minutes. And repeating the washing step for 2 times to ensure the washing effect, stopping the washing pump 315 after the washing is finished, closing the electric valve 328 of the produced water liquid return pipeline, closing the electric valve 330 of the concentrated water liquid return pipeline, and closing the electric valve 321 of the washing water inlet pipeline. Finishing reverse osmosis alkali washing; wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH value is reduced to be more than 0.5, the controller 501 controls the alkali dosing pump 306 to be started until the pH value is restored to the cleaning value;
the acid cleaning process is carried out after the alkaline cleaning is finished, the first step is dispensing, the cleaning box water supplementing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, and the cleaning box water supplementing electric valve 326 is closed. The electric heater 311 is started, when the temperature of the cleaning tank thermometer 324 reaches 45 ℃, the electric heater 311 is stopped, the electric valve 318 of the recirculation pipeline is opened, the cleaning pump 315 is started, circulation is started and medicine feeding is prepared, the acid medicine feeding pump 303 is started, the medicine is added into the cleaning tank 310, cleaning liquid is fully mixed through circulation, when the pH meter 323 of the cleaning tank reaches 2, the concentration of the medicine is about 0.2%, the acid medicine feeding pump 303 is stopped, the second step of small circulation is carried out, the electric valve 328 of the produced water liquid returning pipeline is opened, the electric valve 330 of the concentrated water returning pipeline is opened, the electric valve 321 of the cleaning water feeding pipeline is opened, the electric valve 318 of the recirculation pipeline is closed, the medicine liquid is brought into reverse osmosis for circulation, and the circulation time is 20; and step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2 to 15 hours and can be manually set through the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 15 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, after completely discharging the cleaning liquid in the cleaning tank, closing the blowdown electric valve 314, opening the cleaning tank water replenishing electric valve 326, starting the flushing pump 102, stopping the flushing pump 102 when the cleaning tank 310 reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve 326, starting the electric heater 311, and stopping the electric heater 311 when the cleaning tank thermometer 324 reaches 20 ℃. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water liquid return pipeline is closed, the electric valve 330 of the concentrated water liquid return pipeline is closed, the electric valve 321 of the washing water inlet pipeline is closed, and the reverse osmosis alkali washing is finished; wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH value rises to exceed 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH value is restored to the cleaning value, and after the alkali cleaning and acid cleaning processes, the chemical cleaning of the 5 th situation is completed.
When the condition that the 6 th condition triggers is met, the controller 501 sends a prompt, when the reverse osmosis equipment stops running and is confirmed through manual operation of operators, the cleaning process of alkaline cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501, the first step of dispensing is carried out, the cleaning box water replenishing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, and the cleaning box water replenishing electric valve 326 is closed. The electric heater 311 is started, when the temperature of the cleaning tank thermometer 324 reaches 30 ℃, the electric heater 311 is stopped, the electric valve 318 of the recirculation pipeline is opened, the cleaning pump 315 is started to start circulation and prepare medicine feeding, the alkali dosing pump 306 is started to add the medicine into the cleaning tank 310 and fully mix the cleaning liquid through circulation, when the pH meter 323 of the cleaning tank reaches 12, the concentration of the medicine is about 0.1%, and the alkali dosing pump 306 is stopped; step two, small circulation, namely opening an electric valve 328 of a produced water liquid return pipeline, opening an electric valve 330 of a concentrated water liquid return pipeline, opening an electric valve 321 of a cleaning water inlet pipeline, closing an electric valve 318 of a recirculation pipeline, and bringing liquid medicine into reverse osmosis for circulation, wherein the circulation time is 20 minutes; and step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2 to 15 hours and can be manually set through the controller 501; step four, major cycle, wherein an electric valve 328 of a produced water return pipeline is opened, an electric valve 330 of a concentrated water return pipeline is opened, an electric valve 321 of a cleaning water inlet pipeline is opened, a cleaning pump 315 is started, and the cycle time is controlled to be 60 minutes; and step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, after completely discharging the cleaning liquid in the cleaning tank, closing the blowdown electric valve 314, opening the cleaning tank water replenishing electric valve 326, starting the flushing pump 102, stopping the flushing pump 102 when the cleaning tank 310 reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve 326, starting the electric heater 311, stopping the electric heater 311 when the cleaning tank thermometer 324 reaches 20 ℃, starting the cleaning pump 315, flushing a small amount of residual cleaning liquid in the reverse osmosis by using the flushing water in the cleaning tank 310 for 30 minutes. And repeating the washing step for 2 times to ensure the washing effect, stopping the washing pump 315 after the washing is finished, closing the electric valve 328 of the produced water liquid return pipeline, closing the electric valve 330 of the concentrated water liquid return pipeline, and closing the electric valve 321 of the washing water inlet pipeline. Finishing reverse osmosis alkali washing; wherein in the first step, the second part and the fourth step, the temperature drop and the pH value drop of the cleaning solution can occur, when the temperature drops to exceed 2 ℃, the controller 501 controls the electric heater 311 to start until the temperature returns to the cleaning temperature, and when the pH value drops to exceed 0.5, the controller 501 controls the alkali dosing pump 306 to start until the pH value returns to the cleaning value. After the above alkali cleaning process, the chemical cleaning of the 6 th case is completed.
The invention has the beneficial effects that:
the invention has simple structure, can realize the monitoring of technical indexes under the reverse osmosis operation working condition, automatically judge the chemical cleaning condition, automatically judge the pollutant type and automatically carry out corresponding chemical cleaning. The system has the characteristics of simple structure, high integration level, no additional space, accurate judgment, timely response, high automation degree and the like.
Technical index under the monitoring reverse osmosis equipment operating condition especially collects, analyzes and automatic judgement whether need carry out chemical cleaning to the technical index that can judge reverse osmosis chemical cleaning, and the judgement basis is more scientific, and the judged result is more accurate. The type of the pollutant is automatically judged according to the type of the technical index with problems and the degree of the decline of the index, and the reverse osmosis pollution condition is mastered more accurately, so that a corresponding chemical cleaning method is selected, the problems that the reverse osmosis cleaning effect is poor and the reverse osmosis operation index cannot be recovered due to an incorrect cleaning method are solved, the problem that all chemical cleaning processes are adopted blindly due to the fact that the type of the pollutant cannot be determined is solved, and chemical cleaning chemicals are saved. Required chemical cleaning is automatically carried out, cleaning steps from cleaning preparation, dispensing, opening and closing of a valve and starting and stopping of equipment, circulating establishment, medicine soaking, washing and the like are automatically completed, the cleaning process is controlled more accurately, risks caused by manual operation of medicines and possible operation errors are reduced, and labor cost is saved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the drawings, 101: water production tank, 102: flush pump, 103: flush pump pressure gauge, 104: flush pump outlet manual valve, 105: reverse osmosis flush inlet line, 106: reverse osmosis flushing water inlet electric valve, 201: high-pressure pump, 202: high-pressure pump pressure gauge, 203: high-pressure pump outlet manual valve, 204: high pressure pump outlet electro valve, 205: operating the cartridge filter, 206: operating the water inlet pipeline, 301: acid batch tank, 302: acid liquid outlet pipeline, 303: acid dosing pump, 304: alkali batch meter, 305: alkali effluent pipe, 306: alkali dosing pump, 307: reductant metering tank, 308: reducing agent outlet pipe 309, reducing agent dosing pump: 310: cleaning tank, 311: electric heater, 312: overflow pipe, 313: sewer pipe, 314: blowdown motorised valve, 315: cleaning pump, 316: purge pump pressure gauge, 317: purge pump outlet manual valve, 318: recirculation line electric valve, 319: recirculation line, 320: cleaning cartridge filter, 321: cleaning an electric valve of a water inlet pipeline, 322: cleaning a water inlet pipeline, 323: wash tank pH meter, 324: purge bin thermometer, 325: cleaning tank level gauge, 326: rinse case moisturizing motorised valve, 327: wash case moisturizing pipeline, 328: electric valve of water production and liquid return pipeline, 329: water production and liquid return pipeline, 330: electric valve of concentrated water return pipeline, 331: concentrated water return pipeline, 401: temperature of inflow measurement point, 402: influent conductivity measurement point, 403: water inlet pressure measurement point, 404: a first stage membrane module, 405: a water production pipeline, 406: first stage water production flow measurement point, 407: intersegment piping, 408: intersegment pressure measurement point, 409: two-stage membrane module, 410: secondary produced water pipeline, 411: second-stage product flow measurement point, 412: concentrated water running pipe, 413: concentrate pressure measurement, 414: electric valve of concentrated water running pipeline, 415: concentrate flush electric valve, 416: concentrate running manual valve, 417: produced water recovery pipeline, 418: electric valve of produced water recovery pipeline, 419: product water conductivity measurement, 420: produced water pressure measurement, 421: produced water discharge line, 422: product water discharge pipeline electric valve, 501: and a controller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1: comprises a flushing equipment unit, an operation equipment unit, a cleaning equipment unit, a reverse osmosis component unit and a controller. The flushing equipment unit comprises a water production tank 101, a flushing pump 102 connected with the flushing tank, a flushing pump pressure gauge 103, a flushing pump outlet manual valve 104, a reverse osmosis flushing water inlet pipeline 105 and a reverse osmosis flushing water inlet electric valve 106, wherein the flushing pump pressure gauge 103 and the flushing pump outlet manual valve 104 are sequentially installed at the outlet of the flushing pump 102, and the reverse osmosis flushing water inlet pipeline 105 and the reverse osmosis flushing water inlet electric valve 106 are connected with the. When reverse osmosis normally operates, when reverse osmosis starts the first step, stop accessible flush pump 102 when last step, reverse osmosis washing water inlet pipe 105 carries out low pressure washing to reverse osmosis unit, low pressure washing is mainly with the high salt content's of concentrate side concentrated water discharge system, prevent the reverse osmosis scale deposit, flush pump export manual valve 104 is opened this moment, reverse osmosis washing water inlet motorised valve 106 is opened, concentrated water operation pipeline motorised valve 414 is opened, concentrated water washing motorised valve 415 is opened, product water discharge pipeline motorised valve 422 is opened, all the other valves are closed, start flush pump 102, can carry out low pressure washing to reverse osmosis, concentrated water and product water all discharge into the trench.
The operation equipment unit comprises an operation water inlet pipeline 206, a high-pressure pump 201, a high-pressure pump pressure gauge 202, a high-pressure pump outlet manual valve 203, a high-pressure pump outlet electric valve 204 and an operation cartridge filter 205 which are sequentially arranged. When the reverse osmosis normally operates, the high-pressure pump outlet manual valve 203 is opened, the high-pressure pump outlet electric valve 204 is opened, the concentrated water operation pipeline electric valve 414 is opened, the concentrated water operation manual valve 416 is opened, the produced water recovery pipeline electric valve 418 is opened, the other valves are closed, the high-pressure pump 201 is started, the reverse osmosis is in an operating state, the concentrated water is discharged into the trench, and the produced water is recovered to the produced water tank 101.
The cleaning equipment unit comprises an acid metering tank 301, an alkali metering tank 304, a reducing agent metering tank 307, an acid liquid outlet pipeline 302, an alkali liquid outlet pipeline 305 and a reducing agent liquid outlet pipeline 308 which are respectively connected with the cleaning tank 310, wherein an acid dosing pump 303, an alkali dosing pump 306 and a reducing agent dosing pump 309 are sequentially arranged on the liquid outlet pipelines. In the dispensing stage of the corresponding cleaning mode, the dispensing pump sends a corresponding amount of medicine into the cleaning box 310 to prepare a cleaning solution with a standard concentration. The electric heater 311, the cleaning tank pH meter 323, the cleaning tank thermometer 324 and the cleaning tank liquid level meter 325 are arranged in the cleaning tank 310, the cleaning temperatures required by different cleaning modes are slightly different, the cleaning liquid can be heated by the electric heater 311, and the controller 501 controls the temperature of the cleaning liquid to be maintained in a required range by using the cleaning tank thermometer 324. An overflow pipeline 312 is arranged at the high part of the cleaning tank 310, a sewage discharge pipeline 313 is arranged at the bottom of the cleaning tank, and a sewage discharge electric valve 314 is arranged on the sewage discharge pipeline 313. When the cleaning solution overflows from the cleaning tank 310 in a special case, the cleaning solution can be discharged to the trench through the overflow pipe 312. The cleaning solution drain can be drained to the trench through the blowdown electro-valve 314. The outlet of the cleaning tank 310 is sequentially provided with a cleaning pump 315, a cleaning pump pressure gauge 316 and a cleaning pump outlet manual valve 317. The pipeline behind washing pump outlet manual valve 317 is divided into two branches, one branch is recirculation pipeline 319 connected to washing case 310, install on recirculation pipeline 319 at circulation pipeline motorised valve 318, and the other branch is the washing inlet channel 322 that is connected to reverse osmosis module unit, installs washing cartridge filter 320 on the washing inlet channel in proper order, washs inlet channel motorised valve 321. The cartridge filter 320 can intercept large particulate matter and avoid secondary pollution of the reverse osmosis device. A cleaning tank water supply pipe 327 connecting the washing pump 102 and the cleaning tank 310 is provided with a cleaning tank water supply electric valve 326. When the clean water tank 310 needs to be replenished, the controller 501 opens the cleaning tank replenishing electric valve 326, and the cleaning pump 102 is started to replenish water to the cleaning tank 310. A water production and liquid return pipeline 329 connected with the reverse osmosis component unit and the cleaning box 310, an electric valve 328 for the water production and liquid return pipeline, a concentrated water and liquid return pipeline 331 and an electric valve 330 for the concentrated water and liquid return pipeline are arranged on the water production and liquid return pipeline. During cleaning, concentrated water and produced water are circulated with the cleaning tank 310 through a liquid return pipeline.
The reverse osmosis module unit comprises a water inlet temperature measuring point 401, a water inlet conductivity measuring point 402 and a water inlet pressure measuring point 403, wherein a section of membrane module 404 is connected behind the reverse osmosis module unit, the water production end of the section of membrane module 404 is a section of water production pipeline 405, a section of water production flow measuring point 406 is arranged on the water production end, the concentrated water end of the section of membrane module 404 is an inter-section pipeline 407, and an inter-section pressure measuring point 408 is arranged on the inter-section pipeline. The inter-stage pipeline 407 is connected with a second-stage membrane component 409, the water production end of the second-stage membrane component 409 is a second-stage water production pipeline 410, and a second-stage water production flow rate measuring point 411 is connected with the second-stage water production pipeline. The first water production pipeline 405 and the second water production pipeline 410 are combined into a pipeline to be connected to the water production tank 101, and a water production conductivity measuring point 419, a water production pressure measuring point 420 and a water production recovery pipeline electric valve 418 are installed on the pipeline. The concentrated water end of the two-section membrane component 409 is a concentrated water operation pipeline 412, and a concentrated water pressure measuring point 413, a concentrated water operation pipeline electric valve 414, a concentrated water flushing electric valve 415 and a concentrated water operation manual valve 416 are installed on the concentrated water operation pipeline. When the device normally operates, the reverse osmosis water inlet conductivity measuring point 402, the water inlet pressure measuring point 403, the first-stage produced water flow measuring point 406, the inter-stage pressure measuring point 408, the second-stage produced water flow measuring point 411, the produced water conductivity measuring point 419 and the produced water pressure measuring point 420 are all fed back to the controller 501 for data collection, recording and analysis.
An automatic reverse osmosis cleaning device and method comprises a controller 501. The controller 501 is connected with the flushing pump 102, the reverse osmosis flushing water inlet electric valve 106, the high pressure pump 201, the high pressure pump outlet electric valve 204, the acid dosing pump 303, the alkali dosing pump 306, the reducing agent dosing pump 309, the electric heater 311, the blowdown electric valve 314, the cleaning pump 315, the recirculation pipeline electric valve 318, the cleaning water inlet pipeline electric valve 321, the cleaning tank pH meter 323, the cleaning tank thermometer 324 and the cleaning tank liquid level meter 325, the cleaning box discomfort electric valve 326, the produced water return pipeline electric valve 328, the concentrated water return pipeline electric valve 330, the water inlet temperature measuring point 401, the water inlet conductivity measuring point 402, the water inlet pressure measuring point 403, the first section produced water flow measuring point 406, the inter-section pressure measuring point 408, the second section produced water flow measuring point 411, the concentrated water pressure measuring point 413, the concentrated water running pipeline electric valve 414, the concentrated water flushing electric valve 415, the produced water recovery pipeline electric valve 418, the produced water conductivity measuring point 419 and the produced water pressure measuring point 420 are respectively connected.
The working principle of the invention is as follows:
when the reverse osmosis normally operates, the controller monitors various operation indexes of the reverse osmosis, wherein the operation indexes related to the reverse osmosis chemical cleaning are analyzed in real time, and the method mainly comprises the following steps: the water production flow rate is the sum of the real-time data of the first stage water production flow rate measurement point 406 and the second stage water production flow rate measurement point 411. The first section of pressure difference is the difference between the real-time data of the water inlet pressure measuring point 403 and the real-time data of the pressure measuring point 408 between the sections. The two-stage pressure difference is the difference between the real-time data of the inter-stage pressure measuring point 408 and the real-time data of the concentrated water pressure measuring point 413. The salt permeability is the ratio of the real-time data from the product water conductivity measurement point 419 to the influent water conductivity measurement point 402. It should be noted that the above four operation indexes are values converted to standard temperature (25 ℃) by the water inlet temperature measuring point. The four operation indexes are used as the basis for judging whether the reverse osmosis needs chemical cleaning or not and what kind of chemical cleaning is carried out. The operator first inputs the reference values of the four sets of data at the standard temperature in the controller 501, where the reference values may be indexes of the reverse osmosis device at the initial stage of operation, standard values given by a manufacturer, and the like, and represent data of the reverse osmosis device during normal operation. The need for cleaning and the type of contaminant are determined by comparing real time data during reverse osmosis operation with a reference value.
The controller 501 divides the reverse osmosis fouling and blocking condition into 6 types according to different changes of reverse osmosis operation indexes, and adopts different cleaning modes aiming at the following 6 different types.
In the 1 st case, the water flow rate is decreased by more than 10% from the reference value, which is the main change index. The first-stage pressure difference, the second-stage pressure difference and the salt transmittance have no obvious change. This is typically organic and microbial contamination and can be recovered by caustic and acid washing.
In the 2 nd case, the water production flow rate is decreased by more than 10% compared with the reference value, which is the main change index, and simultaneously, the salt permeability is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the decrease proportion of the first-stage water production flow rate is higher than 15% of the decrease proportion of the second-stage water production flow rate. This condition is typically metal oxide contamination and can be recovered by a reductant purge.
In the 3 rd case, the water production flow rate is decreased by more than 10% compared with the reference value, which is the main change index, meanwhile, the salt permeability is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the decrease proportion of the first-stage water production flow rate is basically equal to that of the second-stage water production flow rate. This condition is typically colloidal contamination and can be recovered by caustic washing.
In the 4 th case, the water production flow rate is decreased by more than 10% from the reference value, which is the main change index, and simultaneously the salt permeability is increased by more than 3% from the reference value, the first-stage pressure difference is increased by more than 5% from the reference value, and the decrease proportion of the water production flow rate in the second stage is higher than 15% of the decrease proportion of the water production flow rate in the first stage. This condition is typically inorganic salt scaling and can be recovered by acid washing.
In the 5 th case, the water flow rate is decreased by more than 10% compared with the reference value, which is the main change index, and the salt permeability is decreased by more than 2% compared with the reference value, and the first-stage pressure difference and the second-stage pressure difference have no obvious change. This condition is typically organic contamination and can be recovered by caustic and acid washes.
In the 6 th case, the pressure difference in the first stage is increased by more than 15% from the reference value, which is the main change index, and the water production flow is slightly decreased by more than 5% from the reference value, and the pressure difference in the second stage and the salt permeability are not obviously changed. This condition is typically microbial contamination and can be recovered by caustic washing.
The acid metering tank is filled with a certain concentration of HCl solution, preferably 31% concentration of HCl solution. The alkali metering box is filled with NaOH solution with certain concentration, preferably 30% NaOH solution. Na with certain concentration is arranged in the reducing agent metering tank2S2O4Solution, preferably 15% Na2S2O4And (3) solution. The flushing pump outlet manual valve 104, the high-pressure pump outlet manual valve 203, the cleaning pump outlet manual valve 317 and the concentrated water operation manual valve are all in an open state under the operation condition and the cleaning condition.
When the condition triggered by the 1 st condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, a cleaning process of alkali cleaning and acid cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. Firstly, an alkaline washing process is carried out, the first step is dispensing, the water replenishing electric valve 326 of the cleaning box is opened, the washing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the washing pump 102 is stopped, and the water replenishing electric valve 326 of the cleaning box is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 30 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The alkaline dosing pump 306 is activated to add the drug to the wash tank 310 and the wash solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 12, at which point the drug concentration is about 0.1%, the base dosing pump 306 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 60 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH drops above 0.5, the controller 501 controls the base dosing pump 306 to start until the pH returns to the purge value.
The acid cleaning process is carried out after the alkaline cleaning is finished, the first step is dispensing, the cleaning box water supplementing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, and the cleaning box water supplementing electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 45 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The acid dosing pump 303 is started to add the drug to the cleaning tank 310 and the cleaning solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 2, at which point the drug concentration is about 0.2%, the acid dosing pump 303 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 15 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH rises above 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH returns to the purge value. After the alkali washing and acid washing processes, the chemical cleaning of the 1 st situation is completed.
When the condition triggered by the 2 nd condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is stopped and is confirmed by manual operation of operators, the cleaning process of the reducing agent is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. The first step is made a prescription, washs case moisturizing motorised valve 326 and opens, and the flush pump 102 starts, and when wasing case 310 and reaching predetermined high liquid level, the flush pump 102 stops, washs case moisturizing motorised valve 326 and closes. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 30 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The reducing agent dosing pump 309 is started to add the chemicals into the cleaning tank 310 and to sufficiently mix the cleaning liquid by circulation. When the wash tank pH meter 323 reaches 5, at which point the drug concentration is about 1%, the reductant dosing pump 309 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 60 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH rises above 0.3, the controller 501 controls the reducing agent dosing pump 309 to start until the pH returns to the purge value. After the above reducing agent cleaning process, the chemical cleaning of the 2 nd case is completed.
When the condition triggered by the 3 rd condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of alkaline cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. The first step is made a prescription, washs case moisturizing motorised valve 326 and opens, and the flush pump 102 starts, and when wasing case 310 and reaching predetermined high liquid level, the flush pump 102 stops, washs case moisturizing motorised valve 326 and closes. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 30 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The alkaline dosing pump 306 is activated to add the drug to the wash tank 310 and the wash solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 12, at which point the drug concentration is about 0.1%, the base dosing pump 306 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 60 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH drops above 0.5, the controller 501 controls the base dosing pump 306 to start until the pH returns to the purge value. After the above alkaline cleaning process, the chemical cleaning of the 3 rd case is completed.
When the condition triggered by the 4 th condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of acid washing is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. The first step is made a prescription, washs case moisturizing motorised valve 326 and opens, and the flush pump 102 starts, and when wasing case 310 and reaching predetermined high liquid level, the flush pump 102 stops, washs case moisturizing motorised valve 326 and closes. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 45 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The acid dosing pump 303 is started to add the drug to the cleaning tank 310 and the cleaning solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 2, at which point the drug concentration is about 0.2%, the acid dosing pump 303 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 15 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH rises above 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH returns to the purge value. After the above acid washing process, the chemical cleaning of the 4 th case is completed.
When the condition triggered by the 5 th condition is met, the controller 501 sends a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, a cleaning process of alkali cleaning and acid cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. Firstly, an alkaline washing process is carried out, the first step is dispensing, the water replenishing electric valve 326 of the cleaning box is opened, the washing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the washing pump 102 is stopped, and the water replenishing electric valve 326 of the cleaning box is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 30 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The alkaline dosing pump 306 is activated to add the drug to the wash tank 310 and the wash solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 12, at which point the drug concentration is about 0.1%, the base dosing pump 306 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 60 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH drops above 0.5, the controller 501 controls the base dosing pump 306 to start until the pH returns to the purge value.
The acid cleaning process is carried out after the alkaline cleaning is finished, the first step is dispensing, the cleaning box water supplementing electric valve 326 is opened, the flushing pump 102 is started, when the cleaning box 310 reaches a preset high liquid level, the flushing pump 102 is stopped, and the cleaning box water supplementing electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 45 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The acid dosing pump 303 is started to add the drug to the cleaning tank 310 and the cleaning solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 2, at which point the drug concentration is about 0.2%, the acid dosing pump 303 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 15 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH rise of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH rises above 0.5, the controller 501 controls the acid dosing pump 303 to start until the pH returns to the purge value. After the alkali washing and acid washing processes, the chemical cleaning of the 5 th situation is completed.
When the condition triggered by the 6 th condition is met, the controller 501 sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of alkaline cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller 501. The first step is made a prescription, washs case moisturizing motorised valve 326 and opens, and the flush pump 102 starts, and when wasing case 310 and reaching predetermined high liquid level, the flush pump 102 stops, washs case moisturizing motorised valve 326 and closes. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 30 deg.C, the electric heater 311 is deactivated. The recirculation line valve 318 is opened and the purge pump 315 is started to begin the cycle and prepare for dosing. The alkaline dosing pump 306 is activated to add the drug to the wash tank 310 and the wash solution is thoroughly mixed by circulation. When the wash tank pH meter 323 reaches 12, at which point the drug concentration is about 0.1%, the base dosing pump 306 stops. In the second step of small circulation, the electric valve 328 of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, and the electric valve 318 of the recirculation pipeline is closed. The liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes. And step three, soaking, namely stopping the cleaning pump 315, closing the electric valve 328 of the produced water return pipeline, closing the electric valve 330 of the concentrated water return pipeline, closing the electric valve 321 of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid. The soaking time is controlled for 2-15 hours, and the time can be manually set through the controller 501. And step four, major circulation, wherein the electric valve 328 of the produced water return pipeline is opened, the electric valve 330 of the concentrated water return pipeline is opened, the electric valve 321 of the cleaning water inlet pipeline is opened, the cleaning pump 315 is started, and the circulation time is controlled to be 60 minutes. And step five, flushing, stopping the cleaning pump 315, opening the blowdown electric valve 314, and closing the blowdown electric valve 314 after cleaning liquid in the cleaning tank is completely discharged. The rinse tank water supplement electric valve 326 is opened, the rinse pump 102 is started, when the rinse tank 310 reaches a preset high liquid level, the rinse pump 102 is stopped, and the rinse tank water supplement electric valve 326 is closed. The electric heater 311 is activated and when the wash tank thermometer 324 reaches 20 deg.C, the electric heater 311 is deactivated. The cleaning pump 315 is started to clean a small amount of cleaning solution remaining in reverse osmosis with the cleaning water in the cleaning tank 310 for 30 minutes. The above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump 315 is stopped, the electric valve 328 of the produced water return pipeline is closed, the electric valve 330 of the concentrated water return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed. And finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops by more than 2 ℃, the controller 501 controls the electric heater 311 to be activated until the temperature is restored to the cleaning temperature. When the pH drops above 0.5, the controller 501 controls the base dosing pump 306 to start until the pH returns to the purge value. After the above alkali cleaning process, the chemical cleaning of the 6 th case is completed.

Claims (9)

1. An automatic reverse osmosis cleaning device is characterized by comprising a flushing equipment unit, an operation equipment unit, a cleaning equipment unit, a reverse osmosis component unit and a controller (501);
the flushing equipment unit comprises a water production tank (101), the output end of the water production tank (101) is connected with a reverse osmosis flushing water inlet pipeline (105) through a flushing pump (102), and the reverse osmosis flushing water inlet pipeline (105) is connected with a reverse osmosis component unit and is used for performing low-pressure flushing on the reverse osmosis component unit;
the operation equipment unit comprises an operation water inlet pipeline (206), the operation water inlet pipeline (206) is used for providing water inlet when reverse osmosis is in an operation state, concentrated water is discharged into a trench, and produced water is recycled to the water production tank (101);
the cleaning equipment unit comprises a cleaning box (310), a dosing pump used for sending corresponding amount of medicine into the cleaning box (310) is arranged on the cleaning box (310), one path of an outlet of the cleaning box (310) is a recirculation system, and the other path of the outlet of the cleaning box (310) is connected to the reverse osmosis component unit;
the reverse osmosis component unit comprises a first-section membrane component (404) and a second-section membrane component (409), wherein the first-section membrane component (404) is connected with a first-section water production pipeline (405), the second-section membrane component (409) is connected with a second-section water production pipeline (410), and the first-section water production pipeline (405) and the second-section water production pipeline (410) are combined into a pipeline which is connected to the water production tank (101);
the controller (501) is used for controlling each unit system.
2. The reverse osmosis automatic cleaning device according to claim 1, wherein a flush pump pressure gauge (103) and a flush pump outlet manual valve (104) are arranged between the flush pump (102) and a reverse osmosis flush water inlet pipeline (105), and a reverse osmosis flush water inlet electric valve (106) is arranged on the reverse osmosis flush water inlet pipeline (105).
3. An automatic reverse osmosis cleaning device according to claim 1, wherein the operation water inlet pipeline (206) is provided with a high-pressure pump (201), a high-pressure pump pressure gauge (202), a high-pressure pump outlet manual valve (203), a high-pressure pump outlet electric valve (204) and an operation cartridge filter (205).
4. A reverse osmosis automatic cleaning device according to claim 1, wherein the cleaning equipment unit comprises an acid metering tank (301), an alkali metering tank (304), a reducing agent metering tank (307), an acid liquid outlet pipeline (302), an alkali liquid outlet pipeline (305) and a reducing agent liquid outlet pipeline (308) which are respectively connected with the cleaning tank (310), and an acid dosing pump (303), an alkali dosing pump (306) and a reducing agent dosing pump (309) are sequentially installed on the liquid outlet pipelines.
5. A reverse osmosis automatic cleaning device according to claim 1, wherein the cleaning tank (310) is internally provided with an electric heater (311), a cleaning tank pH meter (323), a cleaning tank thermometer (324) and a cleaning tank liquid level meter (325), an overflow pipeline (312) is arranged at the high position of the cleaning tank (310), a sewage discharge pipeline (313) is arranged at the bottom of the cleaning tank, and a sewage discharge electric valve (314) is arranged on the sewage discharge pipeline (313).
6. A reverse osmosis automatic cleaning device according to claim 5, wherein a cleaning pump (315), a cleaning pump pressure gauge (316) and a cleaning pump outlet manual valve (317) are sequentially arranged at the outlet of the cleaning tank (310); the pipeline is divided into two branches after cleaning pump outlet manual valve (317), one branch is recirculation pipeline (319) connected to cleaning tank (310), recirculation pipeline (319) is provided with electric valve (318) on the circulation pipeline, the other branch is cleaning water inlet pipeline (322) connected to reverse osmosis component unit, cleaning security filter (320) is sequentially arranged on the cleaning water inlet pipeline, electric valve (321) of the cleaning water inlet pipeline is connected with cleaning tank water replenishing pipeline (327) of flushing pump (102) and cleaning tank (310), electric valve (326) of cleaning tank water replenishing is arranged on the water replenishing pipeline (327), water replenishing pipeline (327) is connected with water producing liquid returning pipeline (329) of reverse osmosis component unit and cleaning tank (310), water producing liquid returning pipeline (328) is arranged on water producing liquid returning pipeline (329), electric valve (310) of cleaning tank is provided with concentrated water liquid returning pipeline (331), an electric valve (330) of the concentrated water liquid return pipeline is arranged on the concentrated water liquid return pipeline (331).
7. A reverse osmosis automatic cleaning device according to claim 1, wherein the water production end of the first section of membrane module (404) is a first section of water production pipeline (405), the first section of water production pipeline (405) is provided with a first section of water production flow measurement point (406), the concentrated water end of the first section of membrane module (404) is an intersegment pipeline (407), the intersegment pipeline (407) is provided with an intersegment pressure measurement point (408), the intersegment pipeline (407) is connected with a second section of membrane module (409) in back, one path of the water production end of the second section of membrane module (409) is connected with a water production discharge pipeline (421), the water production discharge pipeline (421) is provided with a water production discharge pipeline electric valve (422), the other path is connected with a second section of water production pipeline (410), the second section of water production pipeline (410) is connected with a second section of water production flow measurement point (411), the first section of water production pipeline (405), the pipeline is provided with a water production conductivity measuring point (419), a water production pressure measuring point (420) and a water production recovery pipeline electric valve (418), the concentrated water end of the two-section membrane assembly (409) is a concentrated water operation pipeline (412), the concentrated water operation pipeline (412) is provided with a concentrated water pressure measuring point (413), the concentrated water operation pipeline electric valve (414), a concentrated water flushing electric valve (415) and a concentrated water operation manual valve (416).
8. The method for operating an automatic reverse osmosis cleaning device according to any one of claims 1 to 7, comprising the steps of;
when the reverse osmosis works normally, the controller (501) monitors various operation indexes of the reverse osmosis, operating personnel firstly input a reference value of data at a standard temperature in the controller (501), and real-time data during the reverse osmosis operation is compared with the reference value to determine whether cleaning is needed or not and the type of pollutants;
the controller (501) divides reverse osmosis fouling and blocking conditions into 6 types according to different changes of reverse osmosis operation indexes, and adopts different cleaning modes aiming at the following 6 different types;
in the 1 st case, the flow rate of produced water is reduced by more than 10% compared with the reference value, the flow rate is taken as a main change index, the first-stage pressure difference, the second-stage pressure difference and the salt transmittance have no obvious change, the case is generally organic pollution and microbial pollution, and the recovery can be realized by alkali washing and acid washing;
in the 2 nd case, the produced water flow is decreased by more than 10% compared with the reference value, which is the main change index, meanwhile, the salt transmittance is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the first-stage produced water flow decrease proportion is higher than 15% of the second-stage produced water flow decrease proportion, which is generally metal oxide pollution, and the metal oxide pollution is recovered by cleaning with a reducing agent;
in the 3 rd case, the water production flow rate is decreased by more than 10% compared with the reference value, which is the main change index, meanwhile, the salt permeability is increased by more than 3% compared with the reference value, the first-stage pressure difference is increased by more than 5% compared with the reference value, and the decrease proportion of the first-stage water production flow rate is basically equal to that of the second-stage water production flow rate. This condition is typically colloidal contamination and can be recovered by alkaline washing;
in the 4 th case, the water production flow rate is decreased by more than 10% from the reference value, which is the main change index, and simultaneously the salt permeability is increased by more than 3% from the reference value, the first-stage pressure difference is increased by more than 5% from the reference value, and the decrease proportion of the water production flow rate in the second stage is higher than 15% of the decrease proportion of the water production flow rate in the first stage. This condition is typically inorganic salt scaling, which can be recovered by acid washing;
in the 5 th case, the produced water flow is reduced by more than 10% compared with the reference value, which is the main change index, and meanwhile, the salt transmittance is reduced by more than 2% compared with the reference value, and the first-stage pressure difference and the second-stage pressure difference have no obvious change, which is organic pollution and can be recovered by alkali washing and acid washing;
in the 6 th case, the pressure difference in the first stage is increased by more than 15% from the reference value, which is the main change index, and the water production flow is slightly decreased by more than 5% from the reference value, and the pressure difference in the second stage and the salt permeability are not obviously changed, which is the microbial contamination and is recovered by alkaline washing.
9. The operation method of the reverse osmosis automatic cleaning device according to claim 8, characterized in that when the condition of triggering the 1 st condition is met, the controller (501) gives a prompt, when the reverse osmosis equipment is stopped and is confirmed by the manual operation of operators, the cleaning process of alkali cleaning and acid cleaning is carried out, the starting and the stopping of each electric valve and the starting and the stopping of the equipment are judged and controlled by the controller (501), firstly, the alkali cleaning process is carried out, the first step is dispensing, the water replenishing electric valve (326) of the cleaning box is opened, the flushing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, the water replenishing electric valve (326) of the cleaning box is closed, the electric heater (311) is started, when the thermometer (324) of the cleaning box reaches 30 ℃, the electric heater (311) is stopped, the electric valve (318) of the recirculation pipeline is opened, starting a cleaning pump (315), starting circulation and preparing medicine feeding, starting an alkali dosing pump (306), adding medicines into a cleaning box (310), fully mixing the cleaning liquid through circulation, and stopping the alkali dosing pump (306) when a pH meter (323) of the cleaning box reaches 12 and the concentration of the medicines is about 0.1%; step two, small circulation is carried out, wherein an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, an electric valve (318) of a recirculation pipeline is closed, liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, stopping a cleaning pump (315), closing an electric valve (328) of a produced water return pipeline, closing an electric valve (330) of a concentrated water return pipeline, closing an electric valve (321) of a cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by a controller (501); fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 60 minutes; and fifthly, flushing, stopping the cleaning pump (315), opening the electric blowdown valve (314), and closing the electric blowdown valve (314) after cleaning liquid in the cleaning tank is completely discharged. The water replenishing electric valve (326) of the cleaning box is opened, the washing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the washing pump (102) is stopped, and the water replenishing electric valve (326) of the cleaning box is closed; the electric heater (311) is started, and when the temperature of the cleaning tank thermometer (324) reaches 20 ℃, the electric heater (311) is stopped; starting a cleaning pump (315), and cleaning a small amount of cleaning solution remained in the reverse osmosis by using the cleaning water in the cleaning tank (310), wherein the cleaning time is 30 minutes; repeating the washing step for 2 times to ensure the washing effect, stopping the washing pump (315) after the washing is finished, closing the electric valve (328) of the produced water liquid return pipeline, closing the electric valve (330) of the concentrated water liquid return pipeline, and closing the electric valve (321) of the washing water inlet pipeline; and finishing reverse osmosis alkali washing. Wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature drops to exceed 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature is recovered to the cleaning temperature; when the pH value is reduced to exceed 0.5, the controller 501 controls the alkali dosing pump (306) to start until the pH value is restored to the cleaning value;
after alkaline cleaning is finished, an acid cleaning process is carried out, in the first step, dispensing is carried out, a water replenishing electric valve (326) of the cleaning box is opened, a flushing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, and the water replenishing electric valve (326) of the cleaning box is closed; the electric heater 311 is started, and when the temperature of the cleaning tank thermometer (324) reaches 45 ℃, the electric heater (311) is stopped; the electric valve (318) of the recirculation pipeline is opened, the cleaning pump (315) is started, circulation is started, and medicine is prepared to be fed; starting an acid dosing pump (303), adding a medicine into a cleaning box (310), and fully mixing the cleaning liquid through circulation; when the pH meter (323) of the cleaning box reaches 2, the concentration of the medicine is about 0.2%, and the acid dosing pump (303) is stopped; step two, small circulation is carried out, wherein an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, an electric valve (318) of a recirculation pipeline is closed, liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, stopping the cleaning pump (315), closing the electric valve (328) of the produced water return pipeline, closing the electric valve (330) of the concentrated water return pipeline, closing the electric valve (321) of the cleaning water inlet pipeline, and soaking the reverse osmosis pollutants by using cleaning liquid; the soaking time is controlled for 2-15 hours and can be manually set through a controller (501); fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 15 minutes; fifthly, flushing, stopping the cleaning pump (315), opening the blowdown electric valve (314), after cleaning liquid in the cleaning tank is completely discharged, closing the blowdown electric valve (314), opening the cleaning tank water replenishing electric valve (326), starting the flushing pump (102), stopping the flushing pump (102) and closing the cleaning tank water replenishing electric valve (326) when the cleaning tank (310) reaches a preset high liquid level; the electric heater (311) is started, and when the temperature of the cleaning tank thermometer (324) reaches 20 ℃, the electric heater (311) is stopped; starting a cleaning pump (315), and cleaning a small amount of cleaning solution remained in the reverse osmosis by using the cleaning water in the cleaning tank (310), wherein the cleaning time is 30 minutes; repeating the washing step for 2 times to ensure the washing effect, stopping the washing pump (315) after the washing is finished, closing the electric valve (328) of the produced water liquid return pipeline, closing the electric valve (330) of the concentrated water liquid return pipeline, and closing the electric valve (321) of the washing water inlet pipeline; finishing reverse osmosis alkali washing; wherein in the first step, the second part and the fourth step, the temperature drop and the pH value rise of the cleaning solution can occur; when the temperature is reduced to be higher than 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature is recovered to the cleaning temperature, and when the pH value is increased to be higher than 0.5, the controller (501) controls the acid dosing pump (303) to start until the pH value is recovered to the cleaning value. After the alkali washing and acid washing processes, the chemical cleaning of the 1 st situation is completed.
When the condition triggered by the 2 nd condition is met, the controller (501) sends out a prompt, when the reverse osmosis equipment is stopped and is confirmed by manual operation of operators, the cleaning process of the reducing agent is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller (501); the method comprises the following steps that firstly, dispensing is carried out, a water replenishing electric valve (326) of a cleaning box is opened, a washing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the washing pump (102) is stopped, and the water replenishing electric valve (326) of the cleaning box is closed; starting an electric heater (311), stopping the electric heater (311) when a temperature meter (324) of a cleaning box reaches 30 ℃, opening an electric valve (318) of a recirculation pipeline, starting a cleaning pump (315), starting circulation and preparing medicine feeding, starting a reducing agent dosing pump (309), adding a medicine into the cleaning box (310), fully mixing the cleaning liquid through circulation, and stopping the reducing agent dosing pump (309) when a pH meter (323) of the cleaning box reaches 5, wherein the concentration of the medicine is about 1% at the moment; the second step of small circulation, the electric valve (328) of the produced water liquid return pipeline is opened, the electric valve (330) of the concentrated water liquid return pipeline is opened, the electric valve (321) of the cleaning water inlet pipeline is opened, the electric valve (318) of the recirculation pipeline is closed, the liquid medicine is brought into reverse osmosis for circulation, the circulation time is 20 minutes, the third step of soaking is carried out, the cleaning pump (315) is stopped, the electric valve (328) of the produced water liquid return pipeline is closed, the electric valve (330) of the concentrated water liquid return pipeline is closed, the electric valve (321) of the cleaning water inlet pipeline is closed, reverse osmosis pollutants are soaked by using cleaning liquid, the soaking time is controlled for 2-15 hours, and the time can be manually set through the; fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 60 minutes; fifthly, flushing, stopping a cleaning pump (315), opening a blowdown electric valve (314), completely discharging cleaning liquid in a cleaning tank, closing a blowdown electric valve (31)4, opening a cleaning tank water replenishing electric valve (326), starting a flushing pump (102), stopping the flushing pump (102) when the cleaning tank (310) reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve (326), starting an electric heater (311), stopping the electric heater (311) when a cleaning tank thermometer (324) reaches 20 ℃, starting the cleaning pump (315), and flushing a small amount of cleaning liquid remained in reverse osmosis by using the flushing water in the cleaning tank (310) for 30 minutes; repeating the above washing step for 2 times to ensure the washing effect, stopping the washing pump (315) after the washing is finished, closing the electric valve (328) of the produced water return liquid pipeline, closing the electric valve (330) of the concentrated water return liquid pipeline, closing the electric valve (321) of the washing water inlet pipeline, and finishing the reverse osmosis alkali washing, wherein in the first step, the second step and the fourth step, the temperature drop and the pH value rise of the washing liquid can occur, when the temperature drops to exceed 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature returns to the washing temperature, when the pH value rises to exceed 0.3, the controller (501) controls the reducing agent dosing pump (309) to start until the pH value returns to the washing value, and after the reducing agent washing process, the chemical washing of the 2 nd condition is finished;
when the condition triggered by the 3 rd condition is met, the controller (501) sends out a prompt, when the reverse osmosis equipment is shut down and is confirmed by manual operation of operators, the cleaning process of alkaline cleaning is carried out, and the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller (501); the method comprises the steps that firstly, dispensing is carried out, a water replenishing electric valve (326) of a cleaning box is opened, a flushing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, the water replenishing electric valve (326) of the cleaning box is closed, an electric heater (311) is started, when a temperature meter (324) of the cleaning box reaches 30 ℃, the electric heater (311) is stopped, a recirculation pipeline electric valve (318) is opened, a cleaning pump (315) is started, circulation is started and medicine feeding is prepared, an alkali dosing pump (306) is started, medicine is added into the cleaning box (310), cleaning liquid is fully mixed through circulation, when a pH meter (323) of the cleaning box reaches 12, the medicine concentration is about 0.1%, and the alkali dosing pump (306) is stopped; step two, small circulation is carried out, wherein an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, an electric valve (318) of a recirculation pipeline is closed, liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, stopping a cleaning pump (315), closing an electric valve (328) of a produced water return pipeline, closing an electric valve (330) of a concentrated water return pipeline, closing an electric valve (321) of a cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by a controller (501); fourthly, large circulation is carried out, the electric valve (328) of the produced water liquid return pipeline is opened, the electric valve 330 of the concentrated water liquid return pipeline is opened, the electric valve (321) of the cleaning water inlet pipeline is opened, the cleaning pump (315) is started, and the circulation time is controlled to be 60 minutes; fifthly, flushing, stopping a flushing pump (315), opening a blowdown electric valve (314), completely discharging the cleaning liquid in the cleaning tank, closing the blowdown electric valve (314), opening a cleaning tank water replenishing electric valve (32), starting a flushing pump (102), stopping the flushing pump (102) when the cleaning tank (310) reaches a preset high liquid level, closing a cleaning tank water replenishing electric valve (326), starting an electric heater (311), stopping the electric heater (311) when a cleaning tank thermometer (324) reaches 20 ℃, starting the cleaning pump (315), flushing a small amount of cleaning liquid remained in reverse osmosis by using the flushing water in the cleaning tank (310), flushing time being 30 minutes, repeating the above flushing steps for 2 times to ensure the flushing effect, stopping the cleaning pump (315) after flushing is finished, closing a water production return pipeline electric valve (328), closing a concentrated water return pipeline electric valve (330), and closing the electric valve 321 of the cleaning water inlet pipeline, and finishing reverse osmosis alkaline cleaning, wherein in the first step, the second step and the fourth step, the temperature and the pH value of the cleaning solution can be reduced, and when the temperature is reduced to exceed 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature is recovered to the cleaning temperature. When the pH value is decreased to be more than 0.5, the controller 501 controls the alkali dosing pump (306) to start until the pH value is recovered to be the cleaning value, and after the alkali cleaning process, the chemical cleaning of the 3 rd condition is completed.
When the condition triggered by the 4 th situation is met, the controller (501) gives a prompt, when the reverse osmosis equipment is stopped and is confirmed by manual operation of operators, the cleaning process of acid cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller (501), the first step is dispensing, the cleaning box water replenishing electric valve (326) is opened, the flushing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, the cleaning box water replenishing electric valve (326) is closed, the electric heater (311) is started, when the cleaning box thermometer (324) reaches 45 ℃, the electric heater (311) is stopped, the recirculation pipeline electric valve (318) is opened, the cleaning pump (315) is started, circulation is started and medicine feeding is prepared, the acid medicine feeding pump (303) is started, medicines are added into the cleaning box (310), and cleaning liquids are fully mixed through circulation, when the pH meter (323) of the cleaning box reaches 2, the concentration of the medicine is about 0.2%, and the acid dosing pump (303) is stopped; the second step of small circulation, the electric valve (328) of the produced water liquid return pipeline is opened, the electric valve (330) of the concentrated water liquid return pipeline is opened, the electric valve (321) of the cleaning water inlet pipeline is opened, the electric valve (318) of the recirculation pipeline is closed, the liquid medicine is brought into reverse osmosis for circulation, the circulation time is 20 minutes, the third step of soaking is carried out, the cleaning pump (315) is stopped, the electric valve (328) of the produced water liquid return pipeline is closed, the electric valve (330) of the concentrated water liquid return pipeline is closed, the electric valve (321) of the cleaning water inlet pipeline is closed, the reverse osmosis pollutants are soaked by the cleaning liquid, the soaking time is controlled for 2-15 hours, and the time can be manually; fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 15 minutes; fifthly, flushing, stopping the cleaning pump (315), opening the blowdown electric valve (314), after cleaning liquid in the cleaning tank is completely discharged, closing the blowdown electric valve (314), opening the cleaning tank water replenishing electric valve (326), starting the flushing pump (102), stopping the flushing pump (102) and closing the cleaning tank water replenishing electric valve (326) when the cleaning tank (310) reaches a preset high liquid level; starting an electric heater (311), stopping the electric heater (311) when a temperature meter (324) of a cleaning tank reaches 20 ℃, starting a cleaning pump (315), and cleaning a small amount of cleaning solution remained in reverse osmosis by using cleaning water in the cleaning tank (310) for 30 minutes; the above washing step was repeated 2 times to ensure the washing effect. After the washing is finished, the washing pump (315) is stopped, the electric valve (328) of the produced water liquid return pipeline is closed, the electric valve (330) of the concentrated water liquid return pipeline is closed, and the electric valve 321 of the washing water inlet pipeline is closed; the reverse osmosis alkali cleaning is finished, wherein in the first step, the second part and the fourth step, the temperature can be reduced and the pH value of the cleaning solution can be increased; when the temperature drops to exceed 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature returns to the cleaning temperature, and when the pH value rises to exceed 0.5, the controller (501) controls the acid dosing pump (303) to start until the pH value returns to the cleaning value. After the acid washing process, the chemical cleaning of the 4 th condition is completed;
when the condition triggered by the 5 th situation is met, the controller (501) gives a prompt, when the reverse osmosis equipment is stopped and is confirmed by manual operation of operators, a cleaning process of alkali cleaning and acid cleaning is carried out, the starting and the closing of each electric valve and the starting and the stopping of the equipment are judged and controlled by the controller (501), firstly, the alkali cleaning process is carried out, the first step of dispensing is carried out, the water replenishing electric valve (326) of the cleaning box is opened, the flushing pump (102) is started, the flushing pump (102) is stopped when the cleaning box (310) reaches a preset high liquid level, the water replenishing electric valve (326) of the cleaning box is closed, the electric heater (311) is started, when the temperature (324) of the cleaning box reaches 30 ℃, the electric heater (311) is stopped, the electric valve (318) of a recirculation pipeline is opened, the cleaning pump (315) is started, circulation is carried out and medicine is prepared, the alkali medicine adding pump (306) is started, and medicines are added into the cleaning box (, and fully mixing the cleaning liquid by circulation, when the pH meter (323) of the cleaning box reaches 12, the concentration of the medicine is about 0.1 percent, and the alkali dosing pump (306) is stopped; step two, small circulation is carried out, wherein an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, an electric valve (318) of a recirculation pipeline is closed, liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, stopping a cleaning pump (315), closing an electric valve (328) of a produced water return pipeline, closing an electric valve (330) of a concentrated water return pipeline, closing an electric valve (321) of a cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by a controller (501); fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 60 minutes; fifthly, flushing, stopping a cleaning pump (315), opening a blowdown electric valve (314), completely discharging cleaning liquid in a cleaning tank, closing the blowdown electric valve (314), opening a cleaning tank water replenishing electric valve (326), starting a flushing pump (102), stopping the flushing pump (102) when the cleaning tank (310) reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve (326), starting an electric heater (311), stopping the electric heater (311) when a cleaning tank thermometer (324) reaches 20 ℃, starting the cleaning pump (315), flushing a small amount of cleaning liquid remained in reverse osmosis by using the flushing water in the cleaning tank (310), flushing time being 30 minutes, repeating the above flushing steps for 2 times to ensure the flushing effect, stopping the cleaning pump (315) after flushing is finished, closing a water production liquid return pipeline electric valve (328), closing a concentrated water return pipeline electric valve (330), closing an electric valve (321) for cleaning a water inlet pipeline, and finishing reverse osmosis alkali cleaning; wherein in the first step, the second part and the fourth step, a temperature drop and a pH value drop of the cleaning solution may occur. When the temperature is reduced to be higher than 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature is recovered to the cleaning temperature, and when the pH value is reduced to be higher than 0.5, the controller (501) controls the alkali dosing pump (306) to start until the pH value is recovered to the cleaning value;
after the alkaline cleaning is finished, an acid cleaning process is carried out, the first step is dispensing, a cleaning box water replenishing electric valve (326) is opened, a flushing pump (102) is started, when a cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, the cleaning box water replenishing electric valve (326) is closed, an electric heater (311) is started, when a cleaning box thermometer (324) reaches 45 ℃, the electric heater (311) is stopped, a recirculation pipeline electric valve (318) is opened, a cleaning pump (315) is started, circulation is started and medicine feeding is prepared, an acid medicine adding pump (303) is started, medicines are added into the cleaning box (310), cleaning liquid is fully mixed through circulation, when a cleaning box pH meter (323) reaches 2, the medicine concentration is about 0.2%, the acid medicine adding pump (303) is stopped, the second step is small circulation, a water production liquid returning pipeline electric valve (328) is opened, a concentrated water returning pipeline electric valve (330) is opened, the electric valve (321) of the cleaning water inlet pipeline is opened, the electric valve (318) of the recirculation pipeline is closed, and the liquid medicine is brought into reverse osmosis for circulation for 20 minutes; thirdly, soaking, stopping a cleaning pump (315), closing an electric valve (328) of a produced water return pipeline, closing an electric valve (330) of a concentrated water return pipeline, closing an electric valve (321) of a cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by a controller (501); fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 15 minutes; fifthly, flushing, stopping a cleaning pump (315), opening a blowdown electric valve (314), completely discharging cleaning liquid in a cleaning tank, closing the blowdown electric valve (314), opening a cleaning tank water replenishing electric valve (326), starting a flushing pump (102), stopping the flushing pump (102) when the cleaning tank (310) reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve (326), starting an electric heater (311), stopping the electric heater (311) when a cleaning tank thermometer (324) reaches 20 ℃, starting the cleaning pump (315), flushing a small amount of cleaning liquid remained in reverse osmosis by using the flushing water in the cleaning tank (310), flushing time being 30 minutes, repeating the above flushing steps for 2 times to ensure the flushing effect, stopping the cleaning pump (315) after flushing is finished, closing a water production liquid return pipeline electric valve (328), closing a concentrated water return pipeline electric valve (330), closing an electric valve (321) for cleaning a water inlet pipeline, and finishing reverse osmosis alkali cleaning; wherein in the first step, the second part and the fourth step, the temperature drop and the pH value rise of the cleaning solution can occur, when the temperature drops to exceed 2 ℃, the controller (501) controls the electric heater (311) to start until the temperature returns to the cleaning temperature, when the pH value rises to exceed 0.5, the controller (501) controls the acid dosing pump (303) to start until the pH value returns to the cleaning value, and after the alkali washing and acid washing processes, the chemical cleaning of the 5 th situation is finished;
when the condition triggered by the 6 th situation is met, the controller (501) gives a prompt, when the reverse osmosis equipment is stopped and is confirmed by manual operation of operators, a cleaning process of alkaline cleaning is carried out, the opening and closing of each electric valve and the starting and stopping of the equipment are judged and controlled by the controller (501), the first step is dispensing, the cleaning box water replenishing electric valve (326) is opened, the flushing pump (102) is started, when the cleaning box (310) reaches a preset high liquid level, the flushing pump (102) is stopped, the cleaning box water replenishing electric valve (326) is closed, the electric heater (311) is started, when the cleaning box thermometer (324) reaches 30 ℃, the electric heater (311) is stopped, the recirculation pipeline electric valve (318) is opened, the cleaning pump (315) is started, circulation is started and medicine feeding is prepared, the alkaline medicine feeding pump (306) is started, medicines are added into the cleaning box (310), and cleaning liquids are fully mixed through circulation, when the pH meter (323) of the cleaning box reaches 12, the concentration of the medicine is about 0.1 percent, and the alkali dosing pump (306) is stopped; step two, small circulation is carried out, wherein an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, an electric valve (318) of a recirculation pipeline is closed, liquid medicine is brought into reverse osmosis for circulation, and the circulation time is 20 minutes; thirdly, soaking, stopping a cleaning pump (315), closing an electric valve (328) of a produced water return pipeline, closing an electric valve (330) of a concentrated water return pipeline, closing an electric valve (321) of a cleaning water inlet pipeline, soaking the reverse osmosis pollutants by using cleaning liquid, and controlling the soaking time for 2-15 hours, wherein the time can be manually set by a controller (501); fourthly, large circulation is carried out, an electric valve (328) of a produced water liquid return pipeline is opened, an electric valve (330) of a concentrated water liquid return pipeline is opened, an electric valve (321) of a cleaning water inlet pipeline is opened, a cleaning pump (315) is started, and the circulation time is controlled to be 60 minutes; fifthly, flushing, stopping a cleaning pump (315), opening a blowdown electric valve (314), completely discharging cleaning liquid in a cleaning tank, closing the blowdown electric valve (314), opening a cleaning tank water replenishing electric valve (326), starting a flushing pump (102), stopping the flushing pump (102) when the cleaning tank (310) reaches a preset high liquid level, closing the cleaning tank water replenishing electric valve (326), starting an electric heater (311), stopping the electric heater (311) when a cleaning tank thermometer (324) reaches 20 ℃, starting the cleaning pump (315), flushing a small amount of cleaning liquid remained in reverse osmosis by using the flushing water in the cleaning tank (310), flushing time being 30 minutes, repeating the above flushing steps for 2 times to ensure the flushing effect, stopping the cleaning pump (315) after flushing is finished, closing a water production liquid return pipeline electric valve (328), closing a concentrated water return pipeline electric valve (330), closing an electric valve (321) for cleaning a water inlet pipeline, and finishing reverse osmosis alkali cleaning; wherein in the first step, the second part and the fourth step, the temperature drop and the pH value drop of the cleaning liquid can occur, when the temperature drops to exceed 2 ℃, the controller 501 controls the electric heater (311) to start until the temperature is recovered to the cleaning temperature, when the pH value drops to exceed 0.5, the controller (501) controls the alkali dosing pump (306) to start until the pH value is recovered to the cleaning value, and after the alkali cleaning process, the chemical cleaning of the 6 th condition is finished.
CN202110474683.4A 2021-04-29 2021-04-29 Reverse osmosis automatic cleaning device and method Pending CN113041844A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113860432A (en) * 2021-08-20 2021-12-31 华能应城热电有限责任公司 Method for identifying running state of reverse osmosis system
CN113893697A (en) * 2021-11-15 2022-01-07 中国南方电网有限责任公司超高压输电公司贵阳局 Reverse osmosis membrane element cleaning system, cleaning control method and control device
CN114082304A (en) * 2021-12-09 2022-02-25 德州海纳祺环保科技有限公司 Full-automatic reverse osmosis membrane cleaning equipment
CN114632424A (en) * 2022-04-28 2022-06-17 华能威海发电有限责任公司 Acid-base comprehensive compensation system and method for chemical cleaning of reverse osmosis membrane
CN115138216A (en) * 2022-07-05 2022-10-04 珠海格力智能装备有限公司 Urea machine and reverse osmosis membrane cleaning method thereof
CN115745084A (en) * 2022-11-16 2023-03-07 成都川力智能流体设备股份有限公司 Intelligent direct drinking water cleaning device and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113860432A (en) * 2021-08-20 2021-12-31 华能应城热电有限责任公司 Method for identifying running state of reverse osmosis system
CN113893697A (en) * 2021-11-15 2022-01-07 中国南方电网有限责任公司超高压输电公司贵阳局 Reverse osmosis membrane element cleaning system, cleaning control method and control device
CN114082304A (en) * 2021-12-09 2022-02-25 德州海纳祺环保科技有限公司 Full-automatic reverse osmosis membrane cleaning equipment
CN114632424A (en) * 2022-04-28 2022-06-17 华能威海发电有限责任公司 Acid-base comprehensive compensation system and method for chemical cleaning of reverse osmosis membrane
CN115138216A (en) * 2022-07-05 2022-10-04 珠海格力智能装备有限公司 Urea machine and reverse osmosis membrane cleaning method thereof
CN115745084A (en) * 2022-11-16 2023-03-07 成都川力智能流体设备股份有限公司 Intelligent direct drinking water cleaning device and method

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