CN213643753U

CN213643753U - Membrane cleaning device

Info

Publication number: CN213643753U
Application number: CN202022559370.2U
Authority: CN
Inventors: 裘慕贤; 杨帆; 朱筱滢; 李树庭
Original assignee: Baowu Water Technology Co Ltd
Current assignee: Baowu Water Technology Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-09
Anticipated expiration: 2030-11-06

Abstract

The utility model provides a membrane belt cleaning device, including the water circulation pipeline, the control unit, the descaling bath, the alkali wash tank, add the acid pump, add alkali pump and two PH measuring unit, descaling bath and alkali wash tank connect in parallel on the water flow pipeline, add the acid pump and be connected with the descaling bath in order to add acid solution to the descaling bath, add the alkali pump and be connected with the alkali wash tank in order to add alkaline solution to the alkali wash tank, two PH measuring unit set up respectively in descaling bath and alkali wash tank, the control unit respectively with add the acid pump, add alkali pump and two PH measuring unit and be connected, and the control unit controls respectively according to the PH value of two PH measuring unit feedbacks and adds the switching of acid pump and alkali pump, wash the membrane after water flow pipeline handles. The acid adding pump and the alkali adding pump are respectively controlled by the control unit to carry out acid washing and alkali washing on the membrane, so that various pollutants precipitated on the surface of the membrane can be pertinently removed, the automatic cleaning of the membrane is realized, the labor intensity of operators is reduced, and the cleaning effect of the membrane is improved.

Description

Membrane cleaning device

Technical Field

The utility model relates to a water treatment technical field especially relates to a membrane belt cleaning device.

Background

At present, various water treatment membranes such as reverse osmosis membranes, nanofiltration membranes and the like are basically cleaned chemically by field operators, and acid washing or alkali washing is arranged according to different properties of various pollutants. The original early membrane treatment technology is mostly applied to water supply treatment or seawater desalination, the membrane has less pollution frequency due to better water quality, and the membrane is generally cleaned once in 2-3 months.

However, with the large popularization and application of the membrane treatment technology in wastewater, particularly after the large application of zero-discharge projects, the on-line membrane cleaning period is obviously shortened, the pretreated membrane is generally cleaned for 1 time in 1 month, usually cleaned for 1 time in 7-20 days, and the number of membrane devices with different functions is increased, so that the chemical cleaning workload accounts for a large part of the total workload of water treatment operators, and the improvement of the working efficiency and the quality are seriously influenced. Secondly, the membrane cleaning operation involves more potential safety hazards of strong acid and strong alkali, the requirements on operators are high due to more cleaning attention points and more steps, all the steps are easy to be executed incompletely, the cleaning effect is influenced, and the reason is also one of the reasons for poor cleaning effect. In addition, a large amount of labor is consumed, and the on-line chemical cleaning brings great obstruction to the automatic promotion of production operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a membrane belt cleaning device can realize the automatic of membrane and wash, has reduced operating personnel's intensity of labour, has promoted the cleaning performance of membrane.

In order to achieve the aim, the utility model provides a membrane cleaning device, which comprises a water circulation pipeline, a control unit, a pickling tank, an alkali washing tank, an acid adding pump, an alkali adding pump and two PH measuring units, the pickling tank and the alkaline washing tank are connected in parallel on the water flow pipeline, the acid adding pump is connected with the pickling tank to add acid solution into the pickling tank, the alkali adding pump is connected with the alkali washing tank to add an alkaline solution into the alkali washing tank, the two PH measuring units are respectively arranged in the pickling tank and the alkali washing tank, the control unit is respectively connected with the acid adding pump, the alkali adding pump and the two PH measuring units, and the control unit respectively controls the on-off of the acid adding pump and the alkali adding pump according to the pH values fed back by the two pH measuring units, and the washing water is treated by the water circulation pipeline and then washes the membrane.

Optionally, the membrane cleaning device further comprises a centrifugal pump and a variable frequency motor, the centrifugal pump is arranged on the water flow pipeline, cleaning water enters the centrifugal pump after flowing out of the pickling tank or the alkaline washing tank, the variable frequency motor is used for driving the centrifugal pump to operate and adjusting the output flow of the centrifugal pump, and the control unit is connected with the variable frequency motor to control the start and stop of the variable frequency motor.

Optionally, the membrane cleaning device further comprises a cartridge filter, and the cartridge filter is arranged on the water flow pipeline and behind the centrifugal pump.

Optionally, the filtration precision of the cartridge filter is not greater than 5 um.

Optionally, membrane belt cleaning device still includes heating unit and two temperature measurement unit, the heating unit sets up just be located on the water flow pipeline behind the safety filter ware, two temperature measurement unit are located respectively the descaling bath reaches in the alkali wash groove, the control unit respectively with heating unit and two temperature measurement unit are connected, just the control unit basis the temperature value control of temperature measurement unit feedback the heating volume of heating unit.

Optionally, the temperature of the washing water heated by the heating unit is between 25 ℃ and 45 ℃.

Optionally, the heating unit is an adjustable constant temperature electric heater.

Optionally, the membrane cleaning device further comprises a return line, and the cleaning water flows back to the water circulation line through the return line for recycling after cleaning the membrane.

Optionally, the washing water is industrial water or RO production water.

Optionally, the control unit is a PLC controller.

The utility model provides a membrane belt cleaning device controls acid pump and alkali pump respectively through the control unit to carrying out the pickling and washing with alkaline to the membrane, can the pertinence get rid of the various pollutants of membrane surface deposit, realized the automation and the intelligent washing of membrane, reduced operating personnel's intensity of labour by a wide margin, promoted the cleaning performance of membrane simultaneously.

Drawings

Fig. 1 is a schematic view of a membrane cleaning apparatus according to an embodiment of the present invention;

wherein the reference numerals are:

10-a water circulation line; 20-a pickling tank; 30-an alkaline washing tank; 40-acid addition pump; 50-alkali adding pump; 60-centrifugal pump; 70-cartridge filter; 80-a heating unit; 90-film.

Detailed Description

As described in the background art, currently, membrane elements such as reverse osmosis membranes and nanofiltration membranes are widely used in wastewater treatment, and various precipitates are attached to the surface of the membrane, thereby affecting the use effect of the membrane. At present, the cleaning operation of the membrane is mainly controlled manually, so that the efficiency is low, the cleaning effect is poor and potential safety hazards exist.

To this current situation, this application provides a membrane belt cleaning device, can realize the automatic washing of membrane, has reduced operating personnel's intensity of labour by a wide margin, promotes the cleaning performance of membrane simultaneously, prolongs the life of membrane to and reduce the treatment cost of membrane.

The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a simplified form and in non-precise proportions, and are only used for convenience and clarity to assist in explaining the present invention

Referring to fig. 1, the present application provides a membrane cleaning device, comprising a water flow pipeline 10, a control unit, an acid washing tank 20, an alkali washing tank 30, an acid adding pump 40, an alkali adding pump 50 and two PH measuring units, the pickling tank 20 and the alkaline washing tank 30 are connected in parallel to the water circulation line 10, the acid adding pump 40 is connected to the pickling tank 20 to add an acidic solution into the pickling tank 20, the alkali adding pump 50 is connected with the alkali washing tank 30 to add an alkaline solution into the alkali washing tank 30, the two pH measuring units are respectively arranged in the pickling tank 20 and the alkali washing tank 30, the control unit is respectively connected with the acid adding pump 40, the alkali adding pump 50 and the two PH measuring units, and the control unit respectively controls the opening and closing of the acid adding pump 40 and the alkali adding pump 50 according to the pH values fed back by the two pH measuring units, and the washing water is treated by the water circulation pipeline 10 and then washes the membrane 90.

Specifically, the water circulation pipeline 10 is used for processing the cleaning water, so that the cleaning effect of the membrane 90 by the cleaning water is better, and the cleaning efficiency is higher. The wash water is preferably RO product water, and if no RO product water is present, industrial water may be used. In this embodiment, the RO product water is clean water and concentrated water obtained after treatment by a reverse osmosis water treatment system, the clean water and the concentrated water can enter the pickling tank 20 or the alkaline washing tank 30 through different pipelines to be treated, and then the membrane 90 is washed, and the membrane 90 is washed by the washing force of the washing water and the chemical reaction between the washing water and the precipitate attached to the surface of the membrane 90, so that the membrane 90 is washed.

In this embodiment, membrane belt cleaning device can integrate in a mobile device, for example, a box similar to the container, when membrane 90 need wash, can send this container to membrane 90 and locate, connect business turn over water pipe and discharge line and power after, operating personnel can realize the self-cleaning of membrane 90 through the control unit, owing to be portable's device, can remove the use in certain extent, can be convenient wash the membrane 90 to different places, different treatment capacities, greatly reduced the equipment investment.

In this embodiment, the water inlet end and the water outlet end of the water circulation pipeline 10 can be provided with acid and alkali resistant electric ball valves, and the electric ball valves are controlled by the control unit to remotely control the opening and closing of the water circulation pipeline 10.

In this embodiment, the membrane cleaning apparatus further includes a return line, and the cleaning water flows back to the water circulation line 10 through the return line for recycling after cleaning the membrane 90. After the membrane 90 is cleaned, the cleaned water can be recycled through the return pipeline, the utilization rate of the water is improved, and the cleaning cost is reduced.

Referring to fig. 1, the water circulation line 10 is provided with the pickling tank 20 and the alkaline washing tank 30 in parallel. Since the precipitates on the surface of the membrane 90 contain calcium ions, magnesium ions, organic substances, microorganisms, and the like, the acidic solution or the alkaline solution is added to the cleaning water to remove the various precipitates on the surface of the membrane 90. For example, the control unit controls the start of the alkali adding pump 50 to add an alkaline solution into the alkaline washing tank 30, so that the alkaline solution is mixed with the washing water, the PH of the washing water is measured by the PH measuring unit in the alkaline washing tank 30 and information is fed back to the control unit until the PH of the washing water is in accordance with the desired value, and the control unit controls the discharge of the washing water and the flushing of the membrane 90, so that the sediments such as organic matters and microorganisms on the membrane 90 are removed. In this embodiment, the alkaline solution is, for example, a sodium hydroxide solution, and is used to adjust the PH of the washing water to be between 10 and 11, so as to improve the washing effect of the washing water.

The membrane cleaning device can also be used for pickling the membrane 90, the control unit can be used for controlling the starting of the acid adding pump 40 to add an acid solution into the pickling tank 20, so that the acid solution is mixed with cleaning water, then the pH measuring unit in the pickling tank 20 is used for measuring and feeding back information to the control unit until the pH value of the cleaning water is in accordance with the expectation, and then the control unit is used for controlling the discharge of the cleaning water and washing the membrane 90, so that precipitates containing metal ions such as calcium ions and magnesium ions on the membrane 90 are removed. In this embodiment, the acidic solution is, for example, a sodium chloride solution, and is used to adjust the PH of the washing water to be between 2 and 3, so as to improve the washing effect of the washing water.

In this embodiment, the pickling tank 20 and the alkaline washing tank 30 are both made of acid and alkali resistant plastic, and the PH measuring unit is an acid and alkali resistant PH meter.

In this embodiment, the control unit is a PLC controller. Each part of the membrane cleaning device is controlled by the PLC, so that the automation and intelligent cleaning of the membrane 90 are realized, the labor intensity of operators is greatly reduced, and the cleaning effect of the membrane 90 is improved.

With reference to fig. 1, the membrane cleaning apparatus further includes a centrifugal pump 60 and a variable frequency motor, the centrifugal pump 60 is disposed on the water circulation pipeline 10, and the cleaning water flows out from the pickling tank 20 or the alkaline washing tank 30 and then enters the centrifugal pump 60, the variable frequency motor is configured to drive the centrifugal pump 60 to operate and adjust an output flow of the centrifugal pump 60, and the control unit is connected to the variable frequency motor to control start and stop of the variable frequency motor. The centrifugal pump 60 is used in cooperation with the variable frequency motor, and the output flow of the centrifugal pump 60 can be effectively controlled through the variable frequency motor, so that the flow and the pressure of washing water for washing the membrane 90 are controlled, the washing water can be kept in a low-pressure large-flow state, a good washing effect can be achieved, and the membrane 90 can be prevented from being damaged.

With continued reference to fig. 1, the membrane cleaning device further comprises a cartridge filter 70, and the cartridge filter 70 is disposed on the water circulation pipe 10 and behind the centrifugal pump 60. Because the cleaning water is recycled and may contain some impurities, the impurities in the cleaning water can be filtered by the cartridge filter 70, and the impurities can be prevented from damaging the surface of the membrane 90 when the membrane 90 is washed by the impurities.

In this embodiment, the filtering precision of the security filter 70 is not greater than 5um, that is, the filtering pore diameter of the security filter 70 is not greater than 5 um. The cartridge filter 70 has the advantages of high filtering precision, uniform filter element aperture, large flux, strong dirt blocking capability, acid and alkali resistance and other chemical solvents, low operation cost, easy cleaning and the like, and is a better choice. Of course, other filters may be used for filtering, and the present application is not limited thereto.

With reference to fig. 1, the membrane cleaning device further includes a heating unit 80 and two temperature measuring units, the heating unit 80 is disposed on the water circulation pipeline 10 and behind the cartridge filter 70, the two temperature measuring units are respectively disposed in the pickling tank 20 and the alkaline washing tank 30, the control unit is respectively connected to the heating unit 80 and the two temperature measuring units, and the control unit controls the heating amount of the heating unit 80 according to the temperature value fed back by the temperature measuring units. The heating unit 80 heats the washing water, thereby increasing the reaction efficiency between the washing water and the precipitate on the surface of the membrane 90 and improving the washing effect.

In this embodiment, the temperature of the washing water heated by the heating unit 80 is between 25 ℃ and 45 ℃. Since the membrane 90 is easily damaged by the excessive temperature of the washing water, and the washing effect is affected by the excessive temperature of the washing water, the washing effect is optimal and the membrane 90 is not damaged when the temperature of the washing water is controlled to be 25-45 ℃ by the heating unit 80.

In this embodiment, the heating unit 80 is an adjustable constant temperature electric heater. The adjustable constant-temperature electric heater can adjust the temperature of the cleaning water and control the temperature of the cleaning water to be in a constant-temperature state so as to achieve the best cleaning effect.

In this embodiment, the temperature measuring unit is an acid and alkali resistant thermometer. Of course, the temperature measuring unit may also adopt other devices, and the application is not limited to this.

To sum up, the embodiment of the utility model provides a membrane belt cleaning device, including the water flow pipeline, the control unit, the descaling bath, alkali wash tank, add the acid pump, add alkali pump and two PH measuring unit, descaling bath and alkali wash tank connect in parallel on the rivers siphunculus, add the acid pump and be connected with the descaling bath in order to add acid solution to the descaling bath, add the alkali pump and be connected with alkali wash tank in order to add alkaline solution to alkali wash tank, two PH measuring unit set up respectively in descaling bath and alkali wash tank, the control unit respectively with add the acid pump, add alkali pump and two PH measuring unit and be connected, and the control unit controls respectively with the switching of acid pump and alkali pump according to the PH value of two PH measuring unit feedbacks, wash the membrane after rivers road processing. The acid adding pump and the alkali adding pump are respectively controlled by the control unit to carry out acid washing and alkali washing on the membrane, so that various pollutants precipitated on the surface of the membrane can be pertinently removed, the automatic cleaning of the membrane is realized, the labor intensity of operators is reduced, and the cleaning effect of the membrane is improved.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. The utility model provides a membrane belt cleaning device, its characterized in that, includes water circulation pipeline, the control unit, descaling bath, alkali wash tank, add the acid pump, add alkali pump and two PH measuring unit, the descaling bath reaches it is parallelly connected to alkali wash tank on the water circulation pipeline, add the acid pump with the descaling bath connect with to add acid solution in the descaling bath, add alkali pump with alkali wash tank connect with to add alkaline solution, two in the alkali wash tank the PH measuring unit sets up respectively the descaling bath reaches in the alkali wash tank, the control unit respectively with add the acid pump, add alkali pump and two PH measuring unit connect, just the control unit is according to two the PH value of PH measuring unit feedback controls respectively add the acid pump with the switching of adding the alkali pump, wash the water warp to the membrane after the water circulation pipeline is handled.

2. The membrane cleaning device according to claim 1, further comprising a centrifugal pump and a variable frequency motor, wherein the centrifugal pump is arranged on the water flow pipeline, cleaning water flows out of the pickling tank or the alkaline washing tank and enters the centrifugal pump, the variable frequency motor is used for driving the centrifugal pump to operate and adjusting the output flow of the centrifugal pump, and the control unit is connected with the variable frequency motor to control the start and stop of the variable frequency motor.

3. The membrane cleaning device according to claim 2, further comprising a cartridge filter disposed on the water flow line after the centrifugal pump.

4. The membrane cleaning device according to claim 3, wherein the cartridge filter has a filtration precision of not more than 5 um.

5. The membrane cleaning device according to claim 3, further comprising a heating unit and two temperature measurement units, wherein the heating unit is disposed in the water flow passage and behind the cartridge filter, the two temperature measurement units are respectively disposed in the pickling tank and the alkaline washing tank, the control unit is respectively connected to the heating unit and the two temperature measurement units, and the control unit controls the amount of heating of the heating unit according to a temperature value fed back by the temperature measurement unit.

6. The membrane cleaning device according to claim 5, wherein the temperature of the cleaning water heated by the heating unit is between 25 ℃ and 45 ℃.

7. The membrane cleaning device according to claim 5, wherein the heating unit is an adjustable constant temperature electric heater.

8. The membrane cleaning apparatus according to claim 1, further comprising a return line through which the cleaning water flows back to the water circulation line for reuse after cleaning the membrane.

9. The membrane cleaning device according to claim 1, wherein the cleaning water is industrial water or RO production water.

10. The membrane cleaning device according to claim 1, wherein the control unit is a PLC controller.