CN210206469U - Power plant reverse osmosis membrane concentration rate control system - Google Patents
Power plant reverse osmosis membrane concentration rate control system Download PDFInfo
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- CN210206469U CN210206469U CN201920682505.9U CN201920682505U CN210206469U CN 210206469 U CN210206469 U CN 210206469U CN 201920682505 U CN201920682505 U CN 201920682505U CN 210206469 U CN210206469 U CN 210206469U
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- 239000012528 membrane Substances 0.000 title claims abstract description 219
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 105
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- 230000003247 decreasing effect Effects 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 2
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- 238000002425 crystallisation Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of wastewater treatment, and particularly relates to a power plant reverse osmosis membrane concentration ratio control system, which comprises a membrane treatment unit, a water production tank, a concentrated water tank, a detection instrument and a control unit; after the wastewater is treated by the membrane treatment unit, the produced water enters the water production tank, the concentrated water enters the concentrated water tank, the concentrated water with the concentration ratio smaller than the preset concentration ratio returns to the water inlet pipe through the drain pipe and the return pipe, the detection instrument is used for detecting the water quality, and the control unit is used for controlling the operation. The utility model discloses a time delay when detector table and the control unit detect, control membrane processing unit, can avoid artifical control flap, membrane processing unit's concentration multiplying power is stable to can prolong membrane processing unit's life, save the running cost of power plant. Meanwhile, each link of the operation of the reverse osmosis membrane concentration ratio control system of the power plant can be managed and controlled, so that the operation state, operation early warning and operation risk of the membrane processing unit are controlled, and the system further has the characteristic of strong management and control capability.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, concretely relates to concentrated multiplying power control system of reverse osmosis membrane of power plant.
Background
At present, in the field of power plant wastewater treatment, when the power plant wastewater is concentrated and reduced, membrane technologies such as a reverse osmosis membrane, a selective osmosis membrane (forward osmosis) and an electrically driven ionic membrane are generally adopted for concentration. In the operation process of the membrane system, the water inlet condition and the operation condition of the membrane system need to be monitored to prolong the service life of the membrane system, so that the membrane system can stably operate. In the concentration rate control of a reverse osmosis membrane system, a power plant often controls the concentration rate of the membrane concentration system through manpower, so that not only is manual waste caused, but also the instability of the quality and the quantity of concentrated water drainage water is caused. Moreover, the manual sampling and concentration rate measuring period is long, and a manual control valve has time delay, so that the concentration rate of the membrane system is large in fluctuation and cannot be stabilized at a control value, the service life of the membrane system is shortened, the operation and investment cost of a power plant is increased, the monitoring on the membrane system is lacked at present, and the operation of the membrane system cannot be known and controlled in real time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a concentrated multiplying power control system of reverse osmosis membrane of power plant not only can solve the unstable technical problem of the concentrated multiplying power of reverse osmosis membrane among the prior art, can also solve the technical problem that reverse osmosis membrane lacks the management and control among the prior art.
In order to solve the problem, the utility model provides a concentrated multiplying power control system of reverse osmosis membrane of power plant, its technical scheme as follows:
a power plant reverse osmosis membrane concentration ratio control system comprises: the device comprises a membrane processing unit, a water production tank, a concentrated water tank, a detection instrument and a control unit; the membrane treatment unit is used for introducing wastewater through a water inlet pipe, is connected with the water production tank through a water production pipe and is connected with the concentrated water tank through a drain pipe, the drain pipe is connected with the water inlet pipe through a return pipe, and a water pump is arranged on the return pipe; the water inlet pipe, the membrane processing unit, the water production pipe, the water discharge pipe and the concentrated water tank are provided with the detection instrument; the control unit comprises a control module, a water inlet electromagnetic valve, a water discharge electromagnetic valve and a backflow electromagnetic valve, and the water inlet electromagnetic valve is installed on the water inlet pipe; the drain electromagnetic valve is arranged on the drain pipe and is positioned between the return pipe and the concentrated water tank; the backflow solenoid valve is mounted on the backflow pipe; the control unit is respectively connected with the detection instrument, the water inlet electromagnetic valve, the water discharge electromagnetic valve, the water pump and the backflow electromagnetic valve and is used for providing operation control; the control module is provided with a parameter threshold value, and the control module controls the operation of the membrane processing unit by comparing the parameter threshold value with the real-time detection value of the detection instrument; and the control module selects one or more of the real-time detection values to compare with corresponding items of the parameter threshold value, and controls the operation state, operation early warning and operation risk of the membrane processing unit according to the comparison result.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the detection instrument comprises an online water inlet TDS meter, an online water inlet flowmeter, an online thermometer, an online water inlet ORP meter, an online water inlet pH meter, an online water inlet pressure meter and an online SDI (serial digital interface) tester which are arranged on the water inlet pipe; a concentrated water inlet end online pressure instrument and a concentrated water outlet end online pressure instrument which are arranged on the membrane processing unit; the water production online flowmeter, the water production online TDS meter and the water production online pressure meter are arranged on the water production pipe; the online TDS meter of the drainage, online flowmeter of drainage, online pressure meter of drainage installed on said drain pipe; and an online liquid level meter installed on the concentrated water tank.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the membrane treatment unit comprises a first section of reverse osmosis membrane unit and a second section of reverse osmosis membrane unit which are connected in series; the section of reverse osmosis membrane unit comprises a section of water inlet end, a section of membrane component and a section of water outlet end; the first section of water inlet end is provided with a first section of water inlet, and the first section of water inlet is connected with the water inlet pipe; the first section of water outlet end is provided with a first section of produced water outlet and a first section of concentrated water outlet, the first section of produced water outlet is connected with the produced water tank through the produced water pipe, and the first section of concentrated water outlet is connected with the second section of reverse osmosis membrane unit through a water conveying pipe; the second-stage reverse osmosis membrane unit comprises a second-stage water inlet end, a second-stage membrane component and a second-stage water outlet end; the second section water inlet end is provided with a second section water inlet which is connected with the first section concentrated water outlet through the water delivery pipe; the second-stage water outlet end is provided with a second-stage produced water outlet and a second-stage concentrated water outlet, the second-stage produced water outlet is connected with the produced water tank through the produced water pipe, and the second-stage concentrated water outlet is connected with the concentrated water tank through the drain pipe; the control unit further comprises a water delivery online pressure instrument, and the water delivery online pressure instrument is installed on the water delivery pipe and connected with the control module.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the real-time detection value comprises a real-time TDS value of the water inlet pipe detected by the online TDS meter of the inlet water; the real-time water inlet flow value detected by the water inlet online flowmeter; the real-time water inlet temperature value detected by the online thermometer; the real-time intake ORP value detected by the intake online ORP meter; the real-time inlet water pH value is detected by the inlet water online pH meter; the real-time water inlet pressure value detected by the water inlet online pressure instrument; the real-time inlet SDI value detected by the online SDI tester; the real-time pressure value of the concentrated water inlet end detected by the concentrated water inlet end on-line pressure instrument; the real-time outlet pressure value of the concentrated water detected by the concentrated water outlet end on-line pressure instrument; the real-time produced water flow value detected by the produced water on-line flowmeter; a real-time TDS value of the produced water pipe detected by the produced water on-line TDS meter; the real-time water production pressure value detected by the water production online pressure instrument; the real-time TDS value of the drain pipe is detected by the online drainage TDS meter; real-time drainage flow value detected by the drainage on-line flowmeter; the real-time drainage pressure value detected by the drainage online pressure instrument; the real-time liquid level value of the concentrated water tank is detected by the online liquid level meter; the real-time water delivery pressure value detected by the water delivery online pressure instrument; the system also comprises a real-time desalination rate, a real-time recovery rate, a real-time concentration magnification value, a membrane processing unit pressure difference and a membrane processing unit pressure difference of each section; wherein the real-time salt rejection is a ratio of a difference between the real-time TDS value of the water inlet pipe and the water production pipe to the real-time TDS value of the water inlet pipe; the real-time recovery rate is the ratio of the real-time water production flow value to the real-time water inlet flow value; the real-time concentration magnification value is the ratio of the real-time TDS value of the drain pipe to the real-time TDS value of the water inlet pipe; the pressure difference of the membrane treatment unit is the difference value between the real-time concentrated water inlet end pressure value and the real-time concentrated water outlet end pressure value; the pressure difference of each section of the membrane treatment unit comprises a section of reverse osmosis membrane unit pressure difference and a section of reverse osmosis membrane unit pressure difference; the pressure difference of the reverse osmosis membrane unit at one section is the difference value between the real-time concentrated water inlet end pressure value and the real-time water delivery pressure value; and the pressure difference of the two sections of reverse osmosis membrane units is the difference value between the real-time water delivery pressure value and the real-time concentrated water outlet end pressure value.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the control module controls the running state of the membrane processing unit by comparing the parameter threshold value with the real-time liquid level value and the real-time concentration multiplying power value of the concentrated water tank; when the real-time liquid level value of the concentrated water tank is higher than the upper limit of the parameter threshold value, the control module closes the water inlet electromagnetic valve; when the real-time liquid level value of the concentrated water tank is lower than the lower limit of the parameter threshold value, the control module opens the water inlet electromagnetic valve; when the real-time concentration magnification value is not lower than the parameter threshold value, the control module opens the water discharge electromagnetic valve to discharge the concentrated water into the concentrated water tank; when the real-time concentration magnification value is lower than the parameter threshold value, the control module opens the water pump and the backflow electromagnetic valve on the backflow pipe to convey the concentrated water back to the water inlet pipe.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the control module carries out operation early warning control on the membrane processing unit by comparing the parameter threshold value with the real-time TDS value of the drain pipe, the real-time drainage flow value, the real-time inflow temperature value, the real-time inflow ORP value, the real-time inflow pH value, the real-time inflow pressure value, the real-time drainage pressure value, the real-time concentrated water inlet end pressure value, the real-time concentrated water outlet end pressure value, the real-time TDS value of the water production pipe, the real-time TDS value of the water inlet pipe, the real-time produced water flow value, the real-time produced water pressure value, the real-time SDI inflow value, the real-time desalination rate and the; when the real-time TDS value of the drain pipe is lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside; when the real-time drainage flow value is higher than the real-time water inlet flow value, the control module outputs an alarm signal to the outside; when the real-time inlet water temperature value is higher than the upper limit of the parameter threshold value or lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside; when the real-time intake ORP value is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal or a shutdown signal to the outside; when the real-time water inlet pH value is higher than the upper limit of the parameter threshold value or lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside; when the real-time water inlet pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal or a shutdown signal to the outside; when the real-time drainage pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal or a shutdown signal to the outside; when the pressure value at the real-time concentrated water inlet end is lower than the lower limit of the parameter threshold value and/or the pressure value at the real-time concentrated water outlet end is higher than the upper limit of the parameter threshold value, the control module outputs a shutdown signal outwards; when the real-time desalination rate is lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside; when the real-time recovery rate is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal to the outside; when the real-time water production pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal to the outside; and when the real-time water inlet SDI value is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal to the outside.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: and the control module controls the operation risk of the membrane processing unit by comparing the parameter threshold value with the real-time detection value, wherein the operation risk comprises colloid pollution risk, organic matter pollution risk and scaling pollution risk.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the control module controls the colloid pollution risk of the membrane processing unit by comparing the parameter threshold value with the real-time inlet water pressure value, the real-time produced water flow value, the membrane processing unit pressure difference and the real-time desalination rate; and simultaneously, if the real-time inlet water pressure value rises to exceed the parameter threshold, the real-time produced water flow value falls to exceed the parameter threshold, the membrane processing unit pressure difference rises to exceed the parameter threshold, and the real-time desalination rate meets the parameter threshold, the control module judges that colloid pollution occurs and outputs a colloid pollution alarm signal to the outside.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the control module controls the risk of organic pollution of the membrane processing unit by comparing the parameter threshold value with the real-time water production flow value, the real-time water inlet pressure value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit; and simultaneously, the real-time water production flow value is decreased to exceed the parameter threshold, the real-time water inlet pressure value is increased to exceed the parameter threshold, the real-time desalination rate meets the parameter threshold, the pressure difference of each section of the membrane processing unit is increased to exceed the parameter threshold, the pressure difference increasing amplitude of one section of reverse osmosis membrane unit is greater than the pressure difference of the two sections of reverse osmosis membrane units, the control module judges that organic pollution occurs, and an organic pollution risk alarm signal is output outwards.
The power plant reverse osmosis membrane concentration ratio control system as described above is further preferably: the control module controls the fouling risk of the membrane processing unit by comparing the parameter threshold value with the real-time inlet water pressure value, the real-time produced water flow value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit, wherein the fouling risk comprises a sulfate fouling risk, a carbonate fouling risk and a silicate fouling risk; if the differential pressure of the two-section reverse osmosis membrane unit rises to exceed the parameter threshold, the control module judges that sulfate scaling pollution and/or carbonate scaling pollution occur, and outputs alarm signals of sulfate scaling pollution risk and carbonate scaling pollution risk; the real-time water inlet pressure value is increased, the real-time water production flow value is decreased, the real-time desalination rate is decreased, the pressure difference of the first section of reverse osmosis membrane unit meets the parameter threshold value, the pressure difference of the second section of reverse osmosis membrane unit is decreased to exceed the parameter threshold value, then the control module judges that silicate scaling pollution occurs, and outputs a silicate scaling pollution risk alarm signal to the outside.
The analysis can know, compare with prior art, the utility model discloses an advantage and beneficial effect lie in:
the utility model discloses an operation that detector table and the control unit detected, controlled film processing unit, and the concentrated multiplying power that can automatic control film processing unit uses manpower sparingly, simple to operate, and the flexible operation is reliable, time delay when having avoided manual control valve, and film processing unit's concentrated multiplying power is stable to can prolong film processing unit's life, save the running cost of power plant. And, the utility model discloses an instrumentation table and the control unit cooperation are used, can also carry out the management and control to each link of the concentrated multiplying power control system operation of reverse osmosis membrane of power plant to running state, operation early warning and the operational risk of controlling diaphragm processing unit still have the characteristics that controllable degree is high, the management and control ability is strong. And simultaneously, the utility model discloses a membrane processing unit is one section reverse osmosis membrane unit and two-section reverse osmosis membrane unit of establishing ties, can the concentrated work load of rational distribution, alleviates the operation burden of single reverse osmosis membrane unit, improves membrane processing unit's whole operating efficiency to improve membrane processing unit's anti risk ability.
Drawings
FIG. 1 is a schematic connection diagram of a power plant reverse osmosis membrane concentration ratio control system of the present invention;
FIG. 2 is a schematic view of the internal connections of the membrane treatment unit of the present invention;
FIG. 3 is a schematic structural view of a section of reverse osmosis membrane unit of the present invention;
in the figure: 1-water inlet electromagnetic valve; 2-water inlet pipe; 3-online TDS meter of the influent water; 4-water inlet on-line flowmeter; 5-an online thermometer; 6-online ORP meter of the influent water; 7-water inflow online pH meter; 8-water inlet online pressure instrument; 9-online SDI tester; 10-an online pressure meter at the inlet end of the concentrated water; 11-a membrane treatment unit; 12-a concentrated water outlet end on-line pressure instrument; 13-an on-line flow meter for produced water; 14-produced water on-line TDS meter; 15-water production online pressure instrument; 16-a drain pipe; 17-a water production pipe; 18-a water production tank; 19-online TDS meter of the drainage; 20-an online drainage flow meter; 21-a drainage on-line pressure gauge; 22-a drain solenoid valve; 23-an online level gauge; 24-a concentrate tank; 25-a return pipe; 26-a return solenoid valve; 27-a water pump; 28-a control module; 29-water conveying pipe; 30-water delivery online pressure instrument; 31-a section of reverse osmosis membrane unit; 32-two sections of reverse osmosis membrane units; 33-a section of water inlet end; 34-a section of membrane module; 35-first section water outlet end; 36-first section of water outlet; 37-first section of concentrated water outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
In the utility model, the English abbreviation is explained as follows: TDS is an abbreviation for Total dissolved solids; ORP is an abbreviation for Oxidation-Reduction Potential; SDI is the abbreviation of the simple sensitivity Index and is the sludge Density Index; pH is an abbreviation for hydrogen ion concentration, which is the hydrogen ion concentration index; COD is an abbreviation for Chemical Oxygen Demand.
As shown in fig. 1 to 3, fig. 1 is a schematic connection diagram of a reverse osmosis membrane concentration ratio control system of a power plant of the present invention; FIG. 2 is a schematic view of the internal connections of the membrane treatment unit of the present invention; fig. 3 is a schematic structural diagram of a section of reverse osmosis membrane unit of the present invention.
As shown in fig. 1, the utility model provides a power plant reverse osmosis membrane concentration ratio control system, which mainly comprises a membrane treatment unit 11, a water production tank 18, a concentrated water tank 24, a detection instrument and a control unit; the membrane treatment unit 11 introduces waste water through a water inlet pipe 2, is connected with a water production tank 18 through a water production pipe 17, and is connected with a concentrated water tank 24 through a water discharge pipe 16, the water discharge pipe 16 is connected with the water inlet pipe 2 through a return pipe 25, and a water pump 27 is arranged on the return pipe 25; the water inlet pipe 2, the membrane processing unit 11, the water production pipe 17, the water discharge pipe 16 and the concentrated water tank 24 are provided with detection instruments; the control unit comprises a control module 28, a water inlet electromagnetic valve 1, a water discharge electromagnetic valve 22 and a return electromagnetic valve 26, wherein the water inlet electromagnetic valve 1 is arranged on the water inlet pipe 2; the drain solenoid valve 22 is installed on the drain pipe 16 between the return pipe 25 and the concentrate tank 24; a return solenoid valve 26 is installed on the return pipe 25; the control unit is respectively connected with the detection instrument, the water inlet electromagnetic valve 1, the water discharge electromagnetic valve 22, the water pump 27 and the backflow electromagnetic valve 26 and is used for providing operation control; wherein, the control module 28 is provided with a parameter threshold, and the control module 28 controls the operation of the membrane processing unit 11 by comparing the parameter threshold with the real-time detection value of the detection instrument; the control module 28 selects one or more of the real-time detection values to compare with corresponding ones of the parameter threshold values, and controls the operation state, operation early warning and operation risk of the membrane processing unit 11 according to the comparison result.
Particularly, the utility model provides a concentrated multiplying power control system of reverse osmosis membrane of power plant passes through detecting instrument detection membrane processing unit 11's operational parameter, through the operation of control unit control film processing unit 11. When the water inlet electromagnetic valve 1 is opened, wastewater enters the membrane treatment unit 11 from the water inlet pipe 2, the membrane treatment unit 11 carries out concentration treatment on the wastewater, the treated wastewater is divided into produced water and concentrated water, the produced water enters the produced water tank 18 through the produced water pipe 17 and is discharged in a concentrated mode from the produced water tank 18, the concentrated water enters the concentrated water tank 24 through the drain pipe 16 and the drain electromagnetic valve 22, the concentrated water in the concentrated water tank 24 reaches a preset concentration ratio and is discharged in a concentrated mode from the concentrated water tank 24, and evaporative crystallization treatment or flue gas waste heat evaporative treatment can be carried out, so that water saving, emission reduction and cyclic utilization are achieved. The detecting instrument detects the water quality in the water inlet pipe 2 and the water outlet pipe 16, and the control module 28 analyzes the detection data and can obtain the real-time concentration ratio value of the membrane processing unit 11 in real time. The control module 28 is provided with a parameter threshold, the parameter threshold defines a preset concentration factor value, when the real-time concentration factor value is not less than the preset concentration factor value, the drainage electromagnetic valve 22 is opened, and the concentrated water enters the concentrated water tank 24 through the drainage pipe 16; when the real-time concentration factor is smaller than the preset concentration factor, the water discharge solenoid valve 22 is closed, the water pump 27 operates first, then the return solenoid valve 26 is opened, and the concentrated water enters the water inlet pipe 2 from the return pipe 25 to be concentrated again. The utility model discloses an operation that detector table and the control unit detected, control membrane processing unit 11, can automatic control membrane processing unit 11's concentrated multiplying power, uses manpower sparingly, simple to operate, and the flexible operation is reliable, the time delay when having avoided manual control valve, and membrane processing unit 11's concentrated multiplying power is stable to can prolong membrane processing unit 11's life, save the running cost of power plant. Simultaneously, the life of membrane processing unit 11 does not only depend on concentrated multiplying power, still is relevant with operation conditions, waste water parameter, the utility model discloses an inspection appearance and the cooperation of control unit are used, can also carry out the management and control to each link of the concentrated multiplying power control system operation of power plant's reverse osmosis membrane to running state, operation early warning and the operational risk of controlling diaphragm processing unit 11 still have the characteristics that controllable degree is high, the management and control ability is strong.
In order to reduce the operation load of the membrane treatment unit 11 and improve the operation efficiency and the risk resistance of the membrane treatment unit 11, as shown in fig. 1 to 3, the membrane treatment unit 11 includes a first reverse osmosis membrane unit 31 and a second reverse osmosis membrane unit 32 connected in series; the section of reverse osmosis membrane unit 31 comprises a section of water inlet end 33, a section of membrane component 34 and a section of water outlet end 35; the first section of water inlet end 33 is provided with a first section of water inlet which is connected with the water inlet pipe 2; the first section water outlet end 35 is provided with a first section produced water outlet 36 and a first section concentrated water outlet 37, the first section produced water outlet 36 is connected with the produced water tank 18 through the produced water pipe 17, and the first section concentrated water outlet 37 is connected with the second section reverse osmosis membrane unit 32 through the water conveying pipe 29; the second-stage reverse osmosis membrane unit 32 comprises a second-stage water inlet end, a second-stage membrane component and a second-stage water outlet end; the second-stage water inlet end is provided with a second-stage water inlet which is connected with a first-stage concentrated water outlet 37 through a water delivery pipe 29; the two-stage water outlet end is provided with a two-stage produced water outlet and a two-stage concentrated water outlet, the two-stage produced water outlet is connected with a produced water tank 18 through a produced water pipe 17, and the two-stage concentrated water outlet is connected with a concentrated water tank 24 through a drain pipe 16. The water inlet pipe 2, the water outlet pipe 16, the water delivery pipe 29 and the return pipe 25 are made of PVC steel wire pipes and are fixed by pipe hoops. The utility model discloses a set up one section reverse osmosis membrane unit 31 and two-section reverse osmosis membrane unit 32 of establishing ties, can the concentrated work load of rational distribution, alleviate the operation burden of single reverse osmosis membrane unit, improve membrane processing unit 11's whole operating efficiency to improve membrane processing unit 11's anti risk ability.
In order to facilitate the detection of the operation condition of the membrane processing unit 11, as shown in fig. 1, the detection instruments include a water inlet online TDS meter 3, a water inlet online flow meter 4, an online thermometer 5, a water inlet online ORP meter 6, a water inlet online pH meter 7, a water inlet online pressure meter 8, and an online SDI meter 9 which are installed on a water inlet pipe 2; a concentrated water inlet end online pressure instrument 10 and a concentrated water outlet end online pressure instrument 12 which are arranged on the membrane processing unit 11; a produced water on-line flowmeter 13, a produced water on-line TDS meter 14 and a produced water on-line pressure meter 15 which are arranged on a produced water pipe 17; a discharge on-line TDS meter 19, a discharge on-line flowmeter 20 and a discharge on-line pressure meter 21 which are installed on the discharge pipe 16; and an on-line level gauge 23 mounted on the concentrate tank 24, and an on-line pressure gauge 30 mounted on the water delivery pipe 29. The corresponding relation between the detection instrument and the real-time detection value is as follows: the inlet water on-line TDS meter 3 detects the real-time TDS value of the inlet water pipe; the water inlet online flowmeter 4 detects a real-time water inlet flow value; the online thermometer 5 detects the real-time inlet water temperature value; the online ORP meter 6 for water inflow detects the ORP value of the water inflow in real time; the inlet water on-line pH meter 7 detects the real-time inlet water pH value; the water inlet online pressure instrument 8 detects a real-time water inlet pressure value; an online SDI tester 9 detects a real-time inlet SDI value; the online pressure instrument 10 at the concentrated water inlet end detects the real-time pressure value at the concentrated water inlet end; the online pressure instrument 12 at the concentrated water outlet end detects the real-time pressure value at the concentrated water outlet end; a water production online flowmeter 13 detects a real-time water production flow value; the produced water on-line TDS meter 14 detects a real-time TDS value of the produced water pipe; the water production online pressure instrument 15 detects a real-time water production pressure value; the online drainage TDS meter 19 detects the real-time TDS value of the drainage pipe; the drainage on-line flowmeter 20 detects a real-time drainage flow value; the online drainage pressure instrument 21 detects a real-time drainage pressure value; the online liquid level meter 23 detects the real-time liquid level value of the concentrated water tank; the water delivery on-line pressure meter 30 detects a real-time water delivery pressure value. The utility model discloses an installation instrumentation in the concentrated multiplying power control system of reverse osmosis membrane of power plant is convenient for carry out automatic management and control. Furthermore, the real-time detection values are combined and calculated by the control module 28, so that the real-time desalination rate, the real-time recovery rate, the real-time concentration magnification value, the pressure difference of the membrane processing unit 11 and the pressure difference of each section of the membrane processing unit 11 can be obtained. Wherein the real-time desalination rate is the ratio of the difference between the real-time TDS value of the water inlet pipe and the real-time TDS value of the water production pipe to the real-time TDS value of the water inlet pipe; the real-time recovery rate is the ratio of the real-time water production flow value to the real-time water inlet flow value; the real-time concentration magnification value is the ratio of the real-time TDS value of the drain pipe to the real-time TDS value of the water inlet pipe; the pressure difference of the membrane processing unit 11 is the difference value of the real-time inlet pressure value of the concentrated water and the real-time outlet pressure value of the concentrated water; the pressure difference of each section of the membrane treatment unit 11 comprises a first section of reverse osmosis membrane unit pressure difference and a second section of reverse osmosis membrane unit pressure difference; the pressure difference of the reverse osmosis membrane unit at one section is the difference value between the real-time concentrated water inlet end pressure value and the real-time water delivery pressure value; the pressure difference of the two-section reverse osmosis membrane unit is the difference value between the real-time water delivery pressure value and the real-time concentrated water outlet end pressure value.
The utility model discloses an installation instrumentation on the concentrated multiplying power control system of reverse osmosis membrane of power plant to the control module 28 sets up the threshold value scope that corresponds with instrumentation's real-time detection value, with the threshold value scope that corresponds through the combination of control module 28, the real-time detection value that calculates reachs, can carry out the control of running state, operation early warning and operational risk to the concentrated multiplying power control system of reverse osmosis membrane of power plant. Wherein the threshold range comprises a real-time TDS value of a water inlet pipe, a real-time water inlet flow value, a real-time water inlet temperature value, a real-time water inlet ORP value, a real-time water inlet pH value, a real-time water inlet pressure value, a real-time water inlet SDI value, a real-time concentrated water inlet end pressure value, a real-time concentrated water outlet end pressure value, a real-time water production flow value, a real-time water production pipe TDS value, a real-time water production pressure value, a real-time water discharge flow value, a real-time water discharge pressure value, a real-time water tank liquid level value, a real-time water delivery pressure value, a real-time desalination rate, a real-time recovery rate, a real-time concentration magnification.
When the operation state is controlled, as shown in fig. 1, the control module 28 controls the operation state of the membrane processing unit 11 by comparing the parameter threshold value with the real-time level value and the real-time concentration ratio value of the concentrate tank; when the real-time liquid level value of the concentrated water tank is higher than the upper limit of the parameter threshold, the control module 28 closes the water inlet electromagnetic valve 1; when the real-time level value of the concentrated water tank is lower than the lower limit of the parameter threshold, the control module 28 opens the water inlet electromagnetic valve 1; when the real-time concentration magnification value is not lower than the parameter threshold value, the control module 28 opens the water discharge electromagnetic valve 22 to discharge the concentrated water into the concentrated water tank 24; when the real-time concentration magnification value is lower than the parameter threshold value, the control module 28 opens the water pump 27 and the return electromagnetic valve 26 on the return pipe 25 to convey the concentrated water back to the water inlet pipe 2.
When the operation early warning is controlled, as shown in fig. 1 to 3, the control module 28 performs operation early warning control on the membrane processing unit 11 by comparing the parameter threshold value with the real-time TDS value of the drain pipe, the real-time drain flow value, the real-time inlet water temperature value, the real-time inlet water ORP value, the real-time inlet water pH value, the real-time inlet water pressure value, the real-time discharge water pressure value, the real-time concentrate inlet end pressure value, the real-time concentrate outlet end pressure value, the real-time TDS value of the water production pipe, the real-time TDS value of the water inlet pipe, the real-time produced water flow value, the real-time produced; when the real-time TDS value of the drain pipe is lower than the lower limit of the parameter threshold value, the control module 28 outputs an alarm signal to the outside; when the real-time drainage flow value is higher than the real-time inflow flow value, the control module 28 outputs an alarm signal to the outside; when the real-time temperature value of intaking is higher than the upper limit of parameter threshold or is less than the lower limit of parameter threshold, control module 28 externally outputs alarm signal, in the utility model discloses an embodiment, when the real-time temperature value of intaking is higher than 25 ℃ or is less than 10 ℃, control module 28 externally outputs alarm signal, and the parameter threshold of membrane processing unit 11 is 10 ℃ to 25 ℃; when the real-time intake ORP value is higher than the upper limit of the parameter threshold, the control module 28 outputs an alarm signal or outputs a shutdown signal to the outside, in an embodiment of the present invention, the control module 28 outputs an alarm signal to the outside when the real-time intake ORP value is higher than 200MV, and the control module 28 outputs a shutdown signal to the outside when the real-time intake ORP value is higher than 250 MV; when the real-time pH value of the influent water is higher than the upper limit of the parameter threshold or lower than the lower limit of the parameter threshold, the control module 28 outputs an alarm signal to the outside, and in an embodiment of the present invention, when the real-time pH value of the influent water is higher than 9 or lower than 6, the control module 28 outputs an alarm signal to the outside; when the real-time water inlet pressure value is higher than the upper limit of the parameter threshold value, the control module 28 outputs an alarm signal or a stop signal to the outside, in an embodiment of the present invention, the real-time water inlet pressure value is evaluated according to the percentage of the preset pressure value, when the real-time water inlet pressure value exceeds 115%, the control module 28 outputs an alarm signal to the outside, when the real-time water inlet pressure value exceeds 125%, the control module 28 outputs a stop signal to the outside; when the real-time drainage pressure value is higher than the upper limit of the parameter threshold value, the control module 28 outputs an alarm signal or a stop signal to the outside, in an embodiment of the present invention, the real-time drainage pressure value is evaluated according to the percentage of the preset pressure value, when the real-time drainage pressure value exceeds 115%, the control module 28 outputs an alarm signal to the outside, when the real-time drainage pressure value exceeds 125%, the control module 28 outputs a stop signal to the outside; when the real-time inlet pressure value of the concentrated water is lower than the lower limit of the parameter threshold and/or the real-time outlet pressure value of the concentrated water is higher than the upper limit of the parameter threshold, the control module 28 outputs the stop signal to the outside, in an embodiment of the utility model, when the real-time inlet pressure value of the concentrated water is lower than 0.1MPa, the control module 28 outputs the stop signal to the outside, and when the real-time outlet pressure value of the concentrated water is higher than 0.1MPa, the control module 28 outputs the stop signal to the outside; when the real-time desalination rate is lower than the lower limit of the parameter threshold, the control module 28 outputs an alarm signal to the outside, and in an embodiment of the present invention, when the real-time desalination rate is lower than 98%, the control module 28 outputs an alarm signal to the outside; when the real-time recovery rate is higher than the upper limit of the parameter threshold, the control module 28 outputs an alarm signal to the outside, and in an embodiment of the present invention, when the real-time recovery rate is higher than 70%, the control module 28 outputs an alarm signal to the outside; when the real-time water production pressure value is higher than the upper limit of the parameter threshold value, the control module 28 outputs an alarm signal to the outside; when intaking in real time SDI value and being higher than the upper limit of parameter threshold, control module 28 exports alarm signal externally the utility model discloses an in the embodiment, when intaking in real time SDI value and being higher than 3, there is the colloid risk of pollution this moment, and control module 28 exports alarm signal externally. Further, when the differential pressure of the reverse osmosis membrane unit 31 in one section is higher than the upper limit of the parameter threshold, the control module 28 outputs an alarm signal to the outside; when two-stage reverse osmosis membrane unit 32 pressure differential is higher than the upper limit of parameter threshold value, control module 28 externally outputs alarm signal, in an embodiment of the utility model, go the evaluation to predetermine the percentage of pressure differential value, when one section reverse osmosis membrane unit 31 pressure differential and/or two-stage reverse osmosis membrane unit 32 pressure differential are higher than 115%, control module 28 externally outputs alarm signal.
When controlling the operation risk, as shown in fig. 1 to 3, the control module 28 performs operation risk control on the membrane processing unit 11 by comparing the parameter threshold value with the real-time detection value, where the operation risk includes a colloid pollution risk, an organic pollution risk, and a scaling pollution risk.
For the risk of colloid pollution, the fouling of the reverse osmosis membrane unit 31 at one section of the membrane treatment unit 11 is more serious than that of the reverse osmosis membrane unit 32 at the second section, and generally occurs in surface water type water sources or water sources with higher turbidity, as shown in fig. 1 to 3, the control module 28 controls the risk of colloid pollution on the membrane treatment unit 11 by comparing a parameter threshold value with a real-time water inlet pressure value, a real-time water production flow value, a membrane treatment unit 11 pressure difference and a real-time desalination rate; meanwhile, if the real-time inlet water pressure value rises and exceeds the parameter threshold, the real-time produced water flow value falls and exceeds the parameter threshold, the differential pressure of the membrane processing unit 11 (the differential pressure of one section of reverse osmosis membrane unit) rises and exceeds the parameter threshold, and the real-time desalination rate meets the parameter threshold, the control module 28 judges that colloid pollution occurs, outputs a colloid pollution alarm signal to the outside, and reminds people to clean.
For the risk of organic pollution, both the first section of reverse osmosis membrane unit 31 and the second section of reverse osmosis membrane unit 32 of the membrane treatment unit 11 occur, and the occurrence of the first section of reverse osmosis membrane unit 31 is more common and serious than that of the second section of reverse osmosis membrane unit 32. In addition, organic contamination usually occurs in water with high COD content (greater than 10 mg/L) such as coal chemical wastewater, coking wastewater, printing and dyeing wastewater, paper making wastewater, and the like, and is accompanied by microbial contamination (the microbial contamination is serious with the rise of water temperature, i.e., the microbial contamination is serious in summer compared with winter, the microbial contamination is often accompanied by fishy smell, and the odor of burning hair or protein is generated when sampling and burning). The appearance of organic contamination is that the contaminants on the inner wall of the first water inlet end 33 are sticky and slippery, and the inner wall of the first water inlet end 33 is more sticky and slippery than the inner wall of the first water outlet end 35. As shown in fig. 1 to 3, the control module 28 controls the risk of organic contamination of the membrane processing unit 11 by comparing the parameter threshold with the real-time water production flow value, the real-time water inlet pressure value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit 11; meanwhile, when the real-time produced water flow value is decreased to exceed the parameter threshold, the real-time inlet water pressure value is increased to exceed the parameter threshold, the real-time desalination rate meets the parameter threshold, the pressure difference of each section of the membrane processing unit 11 is increased to exceed the parameter threshold, and the rising amplitude of the pressure difference of one section of the reverse osmosis membrane unit is greater than that of the two sections of the reverse osmosis membrane unit, the control module 28 judges that organic pollution occurs and outputs an organic pollution risk alarm signal to the outside.
For the risk of scaling pollution, as shown in fig. 1 to 3, the control module 28 controls the risk of scaling pollution of the membrane processing unit 11 by comparing the parameter threshold with the real-time inlet water pressure value, the real-time produced water flow value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit 11, wherein the risk of scaling pollution includes a risk of sulfate scaling pollution, a risk of carbonate scaling pollution and a risk of silicate scaling pollution; when the pressure difference of the second-stage reverse osmosis membrane unit rises and exceeds a parameter threshold value, the control module 28 judges that sulfate scaling pollution and/or carbonate scaling pollution occurs, and outputs alarm signals of sulfate scaling pollution risk and carbonate scaling pollution risk to the outside; and if the real-time inlet water pressure value rises, the real-time produced water flow value falls and the real-time desalination rate falls, the pressure difference of the first section of reverse osmosis membrane unit meets the parameter threshold value and the pressure difference of the second section of reverse osmosis membrane unit is reduced and exceeds the parameter threshold value, the control module 28 judges that silicate scaling pollution occurs and outputs a silicate scaling pollution risk alarm signal to the outside.
It should be further noted that the names of the online TDS meter 3 for water inlet, the online flow meter 4 for water inlet, the online thermometer 5 for water inlet, the online ORP meter 6 for water inlet, the online pH meter 7 for water inlet, the online pressure meter 8 for water inlet, the online SDI meter 9 for online pressure meter 10 for concentrated water inlet, the online pressure meter 12 for concentrated water outlet, the online flow meter 13 for produced water, the online TDS meter 14 for produced water, the online pressure meter 15 for produced water, the online TDS meter 19 for water discharge, the online flow meter 20 for water discharge, the online pressure meter 21 for water discharge, the online level meter 23 for water discharge, the online pressure meter 30 for water discharge, the water production tank 18, the concentrated water tank 24, the control module 28, the electromagnetic valve 1 for water discharge, the electromagnetic valve 22 for water discharge, the electromagnetic valve 26 for water return, the reverse osmosis membrane unit 31 for one section, the reverse osmosis membrane unit 32 for water inlet, the water inlet pipe 2, the water production pipe 17, the water pipe, the skilled person can correspondingly select appropriate components according to the description of the functions of the components, and perform assembly, connection and operation.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (10)
1. The utility model provides a concentrated multiplying power control system of reverse osmosis membrane of power plant which characterized in that includes:
the device comprises a membrane processing unit, a water production tank, a concentrated water tank, a detection instrument and a control unit;
the membrane treatment unit is used for introducing wastewater through a water inlet pipe, is connected with the water production tank through a water production pipe and is connected with the concentrated water tank through a drain pipe, the drain pipe is connected with the water inlet pipe through a return pipe, and a water pump is arranged on the return pipe;
the water inlet pipe, the membrane processing unit, the water production pipe, the water discharge pipe and the concentrated water tank are provided with the detection instrument;
the control unit comprises a control module, a water inlet electromagnetic valve, a water discharge electromagnetic valve and a backflow electromagnetic valve, and the water inlet electromagnetic valve is installed on the water inlet pipe; the drain electromagnetic valve is arranged on the drain pipe and is positioned between the return pipe and the concentrated water tank; the backflow solenoid valve is mounted on the backflow pipe; the control unit is respectively connected with the detection instrument, the water inlet electromagnetic valve, the water discharge electromagnetic valve, the water pump and the backflow electromagnetic valve and is used for providing operation control;
the control module is provided with a parameter threshold value, and the control module controls the operation of the membrane processing unit by comparing the parameter threshold value with the real-time detection value of the detection instrument;
and the control module selects one or more of the real-time detection values to compare with corresponding items of the parameter threshold value, and controls the operation state, operation early warning and operation risk of the membrane processing unit according to the comparison result.
2. The power plant reverse osmosis membrane concentration rate control system of claim 1, characterized in that:
the detection instrument comprises an online water inlet TDS meter, an online water inlet flowmeter, an online thermometer, an online water inlet ORP meter, an online water inlet pH meter, an online water inlet pressure meter and an online SDI (serial digital interface) tester which are arranged on the water inlet pipe;
a concentrated water inlet end online pressure instrument and a concentrated water outlet end online pressure instrument which are arranged on the membrane processing unit;
the water production online flowmeter, the water production online TDS meter and the water production online pressure meter are arranged on the water production pipe;
the online TDS meter of the drainage, online flowmeter of drainage, online pressure meter of drainage installed on said drain pipe; and an online liquid level meter installed on the concentrated water tank.
3. The power plant reverse osmosis membrane concentration rate control system of claim 2, characterized in that:
the membrane treatment unit comprises a first section of reverse osmosis membrane unit and a second section of reverse osmosis membrane unit which are connected in series;
the section of reverse osmosis membrane unit comprises a section of water inlet end, a section of membrane component and a section of water outlet end;
the first section of water inlet end is provided with a first section of water inlet, and the first section of water inlet is connected with the water inlet pipe;
the first section of water outlet end is provided with a first section of produced water outlet and a first section of concentrated water outlet, the first section of produced water outlet is connected with the produced water tank through the produced water pipe, and the first section of concentrated water outlet is connected with the second section of reverse osmosis membrane unit through a water conveying pipe;
the second-stage reverse osmosis membrane unit comprises a second-stage water inlet end, a second-stage membrane component and a second-stage water outlet end;
the second section water inlet end is provided with a second section water inlet which is connected with the first section concentrated water outlet through the water delivery pipe;
the second-stage water outlet end is provided with a second-stage produced water outlet and a second-stage concentrated water outlet, the second-stage produced water outlet is connected with the produced water tank through the produced water pipe, and the second-stage concentrated water outlet is connected with the concentrated water tank through the drain pipe;
the control unit further comprises a water delivery online pressure instrument, and the water delivery online pressure instrument is installed on the water delivery pipe and connected with the control module.
4. The power plant reverse osmosis membrane concentration rate control system according to claim 3, wherein the real-time detection values comprise:
the real-time TDS value of the water inlet pipe is detected by the online TDS meter of the inlet water;
the real-time water inlet flow value detected by the water inlet online flowmeter;
the real-time water inlet temperature value detected by the online thermometer;
the real-time intake ORP value detected by the intake online ORP meter;
the real-time inlet water pH value is detected by the inlet water online pH meter;
the real-time water inlet pressure value detected by the water inlet online pressure instrument;
the real-time inlet SDI value detected by the online SDI tester;
the real-time pressure value of the concentrated water inlet end detected by the concentrated water inlet end on-line pressure instrument;
the real-time outlet pressure value of the concentrated water detected by the concentrated water outlet end on-line pressure instrument;
the real-time produced water flow value detected by the produced water on-line flowmeter;
a real-time TDS value of the produced water pipe detected by the produced water on-line TDS meter;
the real-time water production pressure value detected by the water production online pressure instrument;
the real-time TDS value of the drain pipe is detected by the online drainage TDS meter;
real-time drainage flow value detected by the drainage on-line flowmeter;
the real-time drainage pressure value detected by the drainage online pressure instrument;
the real-time liquid level value of the concentrated water tank is detected by the online liquid level meter;
the real-time water delivery pressure value detected by the water delivery online pressure instrument;
the system also comprises a real-time desalination rate, a real-time recovery rate, a real-time concentration magnification value, a membrane processing unit pressure difference and a membrane processing unit pressure difference of each section;
wherein the real-time salt rejection is a ratio of a difference between the real-time TDS value of the water inlet pipe and the water production pipe to the real-time TDS value of the water inlet pipe;
the real-time recovery rate is the ratio of the real-time water production flow value to the real-time water inlet flow value;
the real-time concentration magnification value is the ratio of the real-time TDS value of the drain pipe to the real-time TDS value of the water inlet pipe;
the pressure difference of the membrane treatment unit is the difference value between the real-time concentrated water inlet end pressure value and the real-time concentrated water outlet end pressure value;
the pressure difference of each section of the membrane treatment unit comprises a section of reverse osmosis membrane unit pressure difference and a section of reverse osmosis membrane unit pressure difference; the pressure difference of the reverse osmosis membrane unit at one section is the difference value between the real-time concentrated water inlet end pressure value and the real-time water delivery pressure value; and the pressure difference of the two sections of reverse osmosis membrane units is the difference value between the real-time water delivery pressure value and the real-time concentrated water outlet end pressure value.
5. The power plant reverse osmosis membrane concentration rate control system according to claim 4, characterized in that:
the control module controls the running state of the membrane processing unit by comparing the parameter threshold value with the real-time liquid level value and the real-time concentration multiplying power value of the concentrated water tank;
when the real-time liquid level value of the concentrated water tank is higher than the upper limit of the parameter threshold value, the control module closes the water inlet electromagnetic valve;
when the real-time liquid level value of the concentrated water tank is lower than the lower limit of the parameter threshold value, the control module opens the water inlet electromagnetic valve;
when the real-time concentration magnification value is not lower than the parameter threshold value, the control module opens the water discharge electromagnetic valve to discharge the concentrated water into the concentrated water tank;
when the real-time concentration magnification value is lower than the parameter threshold value, the control module opens the water pump and the backflow electromagnetic valve on the backflow pipe to convey the concentrated water back to the water inlet pipe.
6. The power plant reverse osmosis membrane concentration rate control system according to claim 4, characterized in that:
the control module carries out operation early warning control on the membrane processing unit by comparing the parameter threshold value with the real-time TDS value of the drain pipe, the real-time drainage flow value, the real-time inflow temperature value, the real-time inflow ORP value, the real-time inflow pH value, the real-time inflow pressure value, the real-time drainage pressure value, the real-time concentrated water inlet end pressure value, the real-time concentrated water outlet end pressure value, the real-time TDS value of the water production pipe, the real-time TDS value of the water inlet pipe, the real-time produced water flow value, the real-time produced water pressure value, the real-time SDI inflow value, the real-time desalination rate and the;
when the real-time TDS value of the drain pipe is lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside;
when the real-time drainage flow value is higher than the real-time water inlet flow value, the control module outputs an alarm signal to the outside;
when the real-time inlet water temperature value is higher than the upper limit of the parameter threshold value or lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside;
when the real-time intake ORP value is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal or a shutdown signal to the outside;
when the real-time water inlet pH value is higher than the upper limit of the parameter threshold value or lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside;
when the real-time water inlet pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal or a shutdown signal to the outside;
when the real-time drainage pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal or a shutdown signal to the outside;
when the pressure value at the real-time concentrated water inlet end is lower than the lower limit of the parameter threshold value and/or the pressure value at the real-time concentrated water outlet end is higher than the upper limit of the parameter threshold value, the control module outputs a shutdown signal outwards;
when the real-time desalination rate is lower than the lower limit of the parameter threshold value, the control module outputs an alarm signal to the outside;
when the real-time recovery rate is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal to the outside;
when the real-time water production pressure value is higher than the upper limit of the parameter threshold value, the control module outputs an alarm signal to the outside;
and when the real-time water inlet SDI value is higher than the upper limit of the parameter threshold, the control module outputs an alarm signal to the outside.
7. The power plant reverse osmosis membrane concentration rate control system according to claim 4, characterized in that:
and the control module controls the operation risk of the membrane processing unit by comparing the parameter threshold value with the real-time detection value, wherein the operation risk comprises colloid pollution risk, organic matter pollution risk and scaling pollution risk.
8. The power plant reverse osmosis membrane concentration rate control system of claim 7, characterized in that:
the control module controls the colloid pollution risk of the membrane processing unit by comparing the parameter threshold value with the real-time inlet water pressure value, the real-time produced water flow value, the membrane processing unit pressure difference and the real-time desalination rate;
and simultaneously, if the real-time inlet water pressure value rises to exceed the parameter threshold, the real-time produced water flow value falls to exceed the parameter threshold, the membrane processing unit pressure difference rises to exceed the parameter threshold, and the real-time desalination rate meets the parameter threshold, the control module judges that colloid pollution occurs and outputs a colloid pollution alarm signal to the outside.
9. The power plant reverse osmosis membrane concentration rate control system of claim 7, characterized in that:
the control module controls the risk of organic pollution of the membrane processing unit by comparing the parameter threshold value with the real-time water production flow value, the real-time water inlet pressure value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit;
and simultaneously, the real-time water production flow value is decreased to exceed the parameter threshold, the real-time water inlet pressure value is increased to exceed the parameter threshold, the real-time desalination rate meets the parameter threshold, the pressure difference of each section of the membrane processing unit is increased to exceed the parameter threshold, the pressure difference increasing amplitude of one section of reverse osmosis membrane unit is greater than the pressure difference of the two sections of reverse osmosis membrane units, the control module judges that organic pollution occurs, and an organic pollution risk alarm signal is output outwards.
10. The power plant reverse osmosis membrane concentration rate control system of claim 7, characterized in that:
the control module controls the fouling risk of the membrane processing unit by comparing the parameter threshold value with the real-time inlet water pressure value, the real-time produced water flow value, the real-time desalination rate and the pressure difference of each section of the membrane processing unit, wherein the fouling risk comprises a sulfate fouling risk, a carbonate fouling risk and a silicate fouling risk;
if the differential pressure of the two-section reverse osmosis membrane unit rises to exceed the parameter threshold, the control module judges that sulfate scaling pollution and/or carbonate scaling pollution occur, and outputs alarm signals of sulfate scaling pollution risk and carbonate scaling pollution risk;
the real-time water inlet pressure value is increased, the real-time water production flow value is decreased, the real-time desalination rate is decreased, the pressure difference of the first section of reverse osmosis membrane unit meets the parameter threshold value, the pressure difference of the second section of reverse osmosis membrane unit is decreased to exceed the parameter threshold value, then the control module judges that silicate scaling pollution occurs, and outputs a silicate scaling pollution risk alarm signal to the outside.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110124520A (en) * | 2019-05-14 | 2019-08-16 | 北京朗新明环保科技有限公司 | A kind of power plant's reverse osmosis membrane concentration rate control system |
| CN112114109A (en) * | 2020-09-23 | 2020-12-22 | 安徽元通水处理设备有限公司 | Reverse osmosis water quality standard exceeding detection protection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124520A (en) * | 2019-05-14 | 2019-08-16 | 北京朗新明环保科技有限公司 | A kind of power plant's reverse osmosis membrane concentration rate control system |
| CN110124520B (en) * | 2019-05-14 | 2024-04-19 | 国能水务环保有限公司 | Reverse osmosis membrane concentration ratio control system of power plant |
| CN112114109A (en) * | 2020-09-23 | 2020-12-22 | 安徽元通水处理设备有限公司 | Reverse osmosis water quality standard exceeding detection protection system |
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