Circulating cleaning system for pressure film

Abstract

The utility model discloses a circulating cleaning system for a pressure membrane, which relates to the technical field of wastewater membrane treatment and aims to solve the problem of low cleaning efficiency of an existing device for treating a polluted membrane, and the circulating cleaning system comprises a cleaning water tank, and a stirring device, a temperature control device, a security filter and a variable-frequency booster pump which are connected with a controller, a stirring device used for stirring cleaning liquid and a temperature control device used for controlling the temperature of the cleaning liquid are arranged in the cleaning water tank, the input end of the pressure membrane pipe is connected with the output end of the security filter, the input end of the security filter is connected with the output end of the cleaning water tank, and the security filter is used for filtering the cleaning liquid discharged from the cleaning water tank. The output end of the pressure membrane pipe is connected with the input end of the cleaning water tank, and a variable-frequency booster pump is arranged between the security filter and the cleaning water tank, so that the pressure and flow of cleaning liquid can be adjusted at any time, cleaning of different pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis is met, and the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater membrane treatment, and more specifically to a circulation cleaning system for a pressure membrane. Background Art

[0002] With the advocacy and requirements of near-zero wastewater discharge treatment in recent years, as well as the increasing demand for high-quality water from the people and industrial production, membrane treatment technologies such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis have gradually become the dominant treatment technologies for wastewater treatment and resource utilization due to their advantages such as high separation efficiency, good effluent quality, compact layout, easy standardization and equipment.

[0003] Generally speaking, the price of microfiltration, ultrafiltration, nanofiltration or reverse osmosis membranes is often high, resulting in high cost of use. During the membrane separation process, pollutants (inorganic salts, organic matter, colloidal particles and microorganisms, etc.) will inevitably be adsorbed or deposited on the surface and inside of the membrane, causing membrane pollution. Membrane pollution will not only reduce the water output of the membrane, but also deteriorate the water quality of the produced water, affect the service life of the membrane, cause frequent replacement of membrane components, and greatly increase the cost of use. The existing device for treating membrane pollution will increase the temperature of the cleaning fluid during long-term use, thereby affecting the cleaning effect of the membrane and the service life of the membrane.

[0004] Therefore, how to solve the problem of low cleaning efficiency of existing devices for treating contaminated membranes is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a circulation cleaning system for a pressure membrane, which can enable the pressure membrane to be circulated and cleaned for a long period of time under appropriate cleaning water temperature and pressure, so as to improve the cleaning efficiency, extend the service life of the pressure membrane, and thus save operating costs.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A circulation cleaning system for a pressure membrane, comprising:

[0008] A cleaning water tank, wherein the cleaning water tank is provided with a stirring device for stirring the cleaning liquid, and a temperature control device for controlling the temperature of the cleaning liquid;

[0009] A security filter, the input end of which is connected to the output end of the cleaning water tank. The security filter is used to filter the cleaning liquid discharged from the cleaning water tank. A variable frequency booster pump is provided between the security filter and the cleaning water tank.

[0010] A pressure membrane tube, wherein the input end of the pressure membrane tube is connected to the output end of the safety filter, and the output end of the pressure membrane tube is connected to the input end of the cleaning water tank;

[0011] The stirring device, the temperature control device, the safety filter and the variable frequency booster pump are all connected with the controller.

[0012] Preferably, the temperature control device comprises:

[0013] A water chiller is arranged in the cleaning water tank and connected to the controller, and is used to reduce the temperature of the cleaning liquid in the cleaning water tank;

[0014] A heat exchanger is arranged in the cleaning water tank and connected to the controller, and the heat exchanger is used to increase the temperature of the cleaning liquid in the cleaning water tank;

[0015] The thermometer is arranged in the cleaning water tank and connected to the controller. The thermometer is used to measure the temperature of the cleaning liquid in the cleaning water tank.

[0016] Preferably, a heat exchange valve for controlling the operating state of the heat exchanger is provided on the heat exchanger, and the heat exchange valve is connected to the controller.

[0017] Preferably, a pressure sensor is provided between the safety filter and the pressure membrane tube, and the pressure sensor is connected to the controller.

[0018] Preferably, a flow component connected to the controller is provided between the pressure sensor and the pressure membrane tube, and the flow component is used to monitor and control the flow rate of the cleaning liquid in real time.

[0019] Preferably, the flow assembly includes a flow meter and a flow control valve both connected to the controller, the flow meter is used to monitor the flow of the cleaning liquid in real time, and the flow control valve is used to control the flow rate of the cleaning liquid in real time.

[0020] Preferably, a circulation valve is provided on the circulation pipeline connecting the pressure membrane tube and the cleaning water tank, and the circulation valve is connected to the controller.

[0021] Preferably, the output end of the pressure membrane tube is also connected to the waste liquid tank via a waste liquid pipeline, and the waste liquid pipeline is provided with a drain valve connected to the controller.

[0022] Preferably, the circulation valve and the drain valve are both one-way valves.

[0023] Preferably, a cleaning water tank control valve is provided on the pipeline connecting the cleaning water tank and the variable frequency booster pump, and the cleaning water tank control valve is connected to the controller.

[0024] The circulation cleaning system of the pressure membrane provided by the utility model comprises a cleaning water tank, a stirring device, a safety filter, a pressure membrane tube and a controller. Specifically, the stirring device, the temperature control device, the safety filter and the variable frequency booster pump are all connected to the controller, and the operation states of the stirring device, the temperature control device, the safety filter and the variable frequency booster pump are controlled by the controller. The cleaning water tank is provided with a stirring device for stirring the cleaning liquid, and is also provided with a temperature control device for controlling the temperature of the cleaning liquid. The stirring device is controlled to operate by the controller so that the stirring device stirs the cleaning liquid in the cleaning water tank so that the cleaning liquid in the cleaning water tank is in a uniform state. The temperature control device is controlled to operate so that the cleaning liquid in the cleaning water tank can be maintained at an appropriate temperature to avoid the cleaning liquid in the cleaning water tank from being overly hot and damaging the pressure membrane. It can also avoid the cleaning liquid in the cleaning water tank from being too hot due to the low ambient temperature, so as to increase the viscosity of the cleaning liquid and reduce the cleaning efficiency of the pressure membrane.

[0025] The input end of the pressure membrane tube is connected to the output end of the security filter, and the input end of the security filter is connected to the output end of the cleaning water tank. The security filter is used to filter the cleaning liquid discharged from the cleaning water tank. Before cleaning the pressure membrane, the security filter is controlled to operate so that the security filter can filter the cleaning liquid once to prevent harder impurities in the cleaning liquid from scratching the pressure membrane and ensure the normal use of the pressure membrane. The output end of the pressure membrane tube is connected to the input end of the cleaning water tank so that the cleaning waste liquid passing through the pressure membrane tube can circulate back to the cleaning water tank to achieve the recycling of the cleaning liquid, thereby saving the consumption of cleaning liquid and reducing operating costs. A variable frequency booster pump is provided between the security filter and the cleaning water tank. According to the size and requirements of the pressure membrane to be cleaned, the operating state of the variable frequency booster pump is controlled to adjust the pressure and flow of the cleaning liquid at any time to meet the cleaning of different pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis to improve the cleaning effect.

[0026] The circulating cleaning system of the pressure membrane set up in the above manner ensures, through the effective cooperation of the temperature control device and the variable frequency booster pump, that the pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis can be cleaned for a long period of time under suitable cleaning water temperature and pressure under different ambient temperatures, thereby improving the cleaning efficiency and extending the service life of the pressure membrane. The cleaning waste liquid can be collected and reused, thereby saving operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1This is a schematic structural diagram of a circulating cleaning system for a pressure membrane provided by the utility model.

[0029] Reference numerals:

[0030] 1- Clean the water tank;

[0031] 2- stirring device;

[0032] 3-temperature control device, 31-water chiller, 32-heat exchanger, 33-thermometer, 34-heat exchange valve;

[0033] 4- Security filter;

[0034] 5- variable frequency booster pump;

[0035] 6-pressure membrane tube;

[0036] 7- Pressure sensor;

[0037] 8-Flow component;

[0038] 9- Waste liquid tank;

[0039] 10-Circulation valve;

[0040] 11-Drain valve;

[0041] 12-Clean the water tank control valve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The core of the utility model is to provide a circulation cleaning system for a pressure membrane, which can enable the pressure membrane to be circulated and cleaned for a long period of time under suitable cleaning water temperature and pressure, so as to improve the cleaning efficiency, extend the service life of the pressure membrane, and thus save operating costs.

[0044] Please refer to Figure 1 A circulating cleaning system for a pressure membrane includes a cleaning water tank 1, a stirring device 2, a safety filter 4, a pressure membrane tube 6 and a controller.

[0045] Specifically, the stirring device 2, the temperature control device 3, the safety filter 4 and the variable frequency booster pump 5 are all connected to the controller, and the operating states of the stirring device 2, the temperature control device 3, the safety filter 4 and the variable frequency booster pump 5 are controlled by the controller. The cleaning water tank 1 is provided with a stirring device 2 for stirring the cleaning liquid, and is also provided with a temperature control device 3 for controlling the temperature of the cleaning liquid. The stirring device 2 is controlled by the controller to stir the cleaning liquid in the cleaning water tank 1 so that the cleaning liquid in the cleaning water tank 1 is in a uniform state. The temperature control device 3 is controlled to operate so that the cleaning liquid in the cleaning water tank 1 can be maintained at an appropriate temperature to avoid the cleaning liquid in the cleaning water tank 1 from being too hot and damaging the pressure membrane. It can also avoid the cleaning liquid in the cleaning water tank 1 from being too hot due to the low ambient temperature, so as to increase the viscosity of the cleaning liquid and reduce the cleaning efficiency of the pressure membrane.

[0046] The input end of the pressure membrane tube 6 is connected to the output end of the security filter 4, and the input end of the security filter 4 is connected to the output end of the cleaning water tank 1. The security filter 4 is used to filter the cleaning liquid discharged from the cleaning water tank 1. Before cleaning the pressure membrane, the security filter 4 is controlled to operate so that the security filter 4 filters the cleaning liquid once to prevent the harder impurities in the cleaning liquid from scratching the pressure membrane and ensuring the normal use of the pressure membrane. The output end of the pressure membrane tube 6 is connected to the input end of the cleaning water tank 1 so that the cleaning waste liquid passing through the pressure membrane tube 6 can circulate back to the cleaning water tank 1 to achieve the recycling of the cleaning liquid, thereby saving the consumption of the cleaning liquid and reducing the operating cost. A variable frequency booster pump 5 is provided between the security filter 4 and the cleaning water tank 1. According to the size and requirements of the pressure membrane to be cleaned, the operating state of the variable frequency booster pump 5 is controlled to adjust the pressure and flow of the cleaning liquid at any time to meet the cleaning of different pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis to improve the cleaning effect.

[0047] Among them, in this embodiment, the stirring device 2 is specifically a stirring paddle, which stirs the cleaning liquid circulated back to the cleaning water tank 1 and the cleaning liquid in the cleaning water tank 1 evenly to improve the stability of the cleaning liquid for cleaning the pressure membrane. The cleaning water tank 1 stores and configures the cleaning liquid with membrane water or soft water. The variable frequency booster pump 5 can adjust the pressure and flow of the cleaning liquid at any time to meet the cleaning requirements of different pressure membranes and improve the cleaning effect. In practical applications, the cleaning liquid is mostly acid or alkaline solution, so the stirring device 2 needs to be corrosion-resistant. There is no restriction on the type and structure of the stirring device 2, as long as the above-mentioned technical effect can be achieved.

[0048] The circulating cleaning system of the pressure membrane set up in the above manner ensures, through the effective cooperation of the temperature control device 3 and the variable frequency booster pump 5, that the pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis can be circulated and cleaned for a long period of time at suitable cleaning water temperature and pressure under different ambient temperatures, thereby improving the cleaning efficiency and extending the service life of the pressure membrane. The cleaning waste liquid can be collected and reused, thereby saving operating costs.

[0049] In the above embodiment, the temperature control device 3 includes a chiller 31, a heat exchanger 32 and a thermometer 33. The chiller 31, the heat exchanger 32 and the thermometer 33 are all arranged in the cleaning water tank 1 and connected to the controller. The chiller 31 is used to reduce the temperature of the cleaning liquid in the cleaning water tank 1, the heat exchanger 32 is used to increase the temperature of the cleaning liquid in the cleaning water tank 1, and the thermometer 33 is used to measure the temperature of the cleaning liquid in the cleaning water tank 1.

[0050] It should be noted that a heat exchange coil connected to the chiller 31 is provided in the cleaning water tank 1, and a heat exchange coil connected to the heat exchanger 32 is also provided. The thermometer 33 can monitor the temperature of the cleaning liquid in real time, and feed back the temperature data of the cleaning liquid in the cleaning water tank 1 to the controller in real time, and control the next operation through the controller, so as to ensure that the cleaning liquid can always be at a suitable temperature for cleaning the pressure membrane.

[0051] When the thermometer 33 detects that the temperature of the cleaning liquid in the cleaning water tank 1 is higher than the preset temperature, the controller controls the chiller 31 to operate to lower the temperature of the cleaning liquid. When the temperature of the cleaning liquid drops to the preset temperature, the controller controls the chiller 31 to shut down to ensure long-term circulation cleaning of pressure membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis, ensuring that the cleaning liquid is always at a suitable cleaning temperature, realizing long-term circulation cleaning of the pressure membrane, avoiding irreversible damage to the pressure membrane caused by excessively high cleaning liquid temperature, saving the amount of cleaning agent added, and reducing costs.

[0052] When the thermometer 33 detects that the temperature of the cleaning liquid in the cleaning water tank 1 is lower than the preset temperature, the controller controls the heat exchanger 32 to operate to increase the temperature of the cleaning liquid. When the temperature of the cleaning liquid rises to the preset temperature, the controller controls the heat exchanger 32 to close. This is mainly to avoid the situation where the cleaning liquid temperature is low and the viscosity increases when the ambient temperature is low, resulting in a decrease in the flow rate of the cleaning liquid and a decrease in the cleaning efficiency.

[0053] The chiller 31, the heat exchanger 32 and the thermometer 33 may also be replaced by other components without limitation, as long as the above-mentioned technical effects can be achieved.

[0054] In the above situation, the heat exchanger 32 is provided with a heat exchange valve 34 for controlling the operating state of the heat exchanger 32 , and the heat exchange valve 34 is connected to the controller.

[0055] It can be understood that the controller controls the heat exchange valve 34 to open, and adjusts the temperature of the cleaning liquid in the cleaning water tank 1 through the heat exchanger 32 so that the cleaning liquid is at an optimal cleaning temperature.

[0056] Furthermore, a pressure sensor 7 is provided between the safety filter 4 and the pressure membrane tube 6 , and the pressure sensor 7 is connected to the controller.

[0057] It should be noted that the safety filter 4 is connected to the pressure membrane tube 6 through a circulation pipeline. The pressure sensor 7 is arranged on the circulation pipeline to monitor the pressure of the cleaning fluid in the circulation pipeline in real time, and the monitored pressure data of the cleaning fluid is fed back to the controller, which controls the variable frequency booster pump 5 through the controller to adjust the cleaning pressure in the circulation pipeline.

[0058] In the above embodiment, a flow component 8 connected to the controller is provided between the pressure sensor 7 and the pressure membrane tube 6, and the flow component 8 is used to monitor and control the flow rate of the cleaning liquid in real time.

[0059] It can be understood that a flow component 8 is provided on the circulation pipeline for real-time monitoring of the flow of the cleaning liquid in the circulation pipeline and feeding back the monitored flow rate data to the controller.

[0060] On the basis of the above embodiment, the flow component 8 includes a flow meter and a flow control valve both connected to the controller, the flow meter is used to monitor the flow of the cleaning liquid in real time, and the flow control valve is used to control the flow rate of the cleaning liquid in real time.

[0061] It should be noted that the flow meter is used to monitor the flow of the cleaning fluid in the circulation pipe in real time and feed the monitored data back to the controller. The controller further controls the degree of opening of the flow control valve by judging the relationship between the monitored real-time flow rate and the preset flow rate.

[0062] Among them, in this embodiment, the control of the flow rate of the cleaning liquid in the circulation pipeline is achieved through the cooperation of the controller, the flow meter and the flow control valve. However, in actual applications, the flow rate of the cleaning liquid in the circulation pipeline can also be directly controlled through the cooperation of the controller, the flow meter and the variable frequency booster pump 5. There is no limitation to this, as long as the above-mentioned technical effect can be achieved.

[0063] In the above embodiment, a circulation valve 10 is provided on the circulation pipeline connecting the pressure membrane tube 6 and the cleaning water tank 1, and the circulation valve 10 is connected to the controller.

[0064] In the above case, the output end of the pressure membrane tube 6 is also connected to the waste liquid tank 9 through a waste liquid pipeline, and the waste liquid pipeline is provided with an emptying valve 11 connected to the controller.

[0065] It can be understood that when the contaminated pressure membrane needs to be cleaned for a long time, the controller controls the circulation valve 10 to open, and controls the emptying valve 11 to close, so that the waste liquid after cleaning the pressure membrane tube 6 is returned to the cleaning water tank 1 through the circulation pipe, so as to realize the circulation cleaning of the pressure membrane tube 6. When the long-term cleaning of the contaminated pressure membrane is suspended, when the cleaning liquid discharged from the cleaning water tank 1 completes the cleaning of the pressure membrane tube 6, the controller controls the emptying valve 11 to open, and controls the circulation valve 10 to close, so that the waste liquid is discharged into the waste liquid tank 9 through the waste liquid pipe for collection or reuse.

[0066] As a preferred embodiment, the drain valve 11 and the circulation valve 10 are both one-way valves.

[0067] It should be noted that, in this embodiment, both the drain valve 11 and the circulation valve 10 are set as one-way valves to avoid the backflow of the cleaning liquid. However, in actual applications, there is no limitation to this as long as the above-mentioned technical effects can be achieved.

[0068] In the above embodiment, a cleaning water tank control valve 12 is provided on the pipeline connecting the cleaning water tank 1 and the variable frequency booster pump 5, and the cleaning water tank control valve 12 is connected to the controller.

[0069] It can be understood that when the pressure membrane tube 6 needs to be cleaned, the controller controls the cleaning water tank control valve 12 to open so that the cleaning liquid in the cleaning water tank 1 can flow out smoothly. When the pressure membrane tube 6 does not need to be cleaned, the controller controls the cleaning water tank control valve 12 to close to prevent the cleaning liquid in the cleaning water tank 1 from flowing out.

[0070] The operation process of the circulating cleaning system set up in the present application is as follows: after the cleaning liquid is prepared with membrane water or soft water, it is added into the cleaning water tank 1 to a preset height, the controller controls the cleaning water tank control valve 12 and the circulation valve 10 to open, and at the same time controls the emptying valve 11 to close, and controls the stirring device 2 to open, so that the cleaning liquid in the cleaning water tank 1 is stirred evenly, and the cleaning liquid flows out from the output end of the cleaning water tank 1. After the controller controls the variable frequency booster pump 5 to adjust to the appropriate pressure and flow, the cleaning liquid is filtered through the safety filter 4 and enters the pressure membrane tube 6 to clean the pressure membrane. The cleaning liquid flowing out of the pressure membrane tube 6 is returned to the cleaning water tank 1 for circulating cleaning.

[0071] During the long-term circulation cleaning process, the temperature of the cleaning liquid in the cleaning water tank 1 is monitored in real time by the thermometer 33, and the monitored data is fed back to the controller in real time. When the monitored temperature of the cleaning liquid is higher than the preset cleaning liquid temperature, the chiller 31 is controlled to open, so that the temperature of the cleaning liquid in the cleaning water tank 1 is reduced to ensure that the cleaning liquid in the cleaning water tank 1 is at an appropriate cleaning temperature. When the temperature of the cleaning liquid in the cleaning water tank is reduced to the preset cleaning liquid temperature, the chiller 31 is controlled to be closed; when the ambient temperature is low and the temperature of the cleaning liquid monitored by the thermometer 33 is lower than the preset cleaning liquid temperature, the controller controls the heat exchange valve 34 to open, and controls the heat exchange valve 34 to close after the cleaning liquid temperature rises to the preset water temperature; when the pressure membrane cleaning is completed, the drain valve 11 is controlled to be opened, and the circulation valve 10 is controlled to be closed at the same time, so that the cleaning liquid is discharged into the waste liquid tank 9 for collection or reuse.

[0072] In summary, the circulation cleaning system of the pressure membrane provided by the utility model utilizes the effective cooperation of the chiller 31, the heat exchanger 32 and the variable frequency booster pump 5 to ensure that under different ambient temperatures, pressure-driven membranes such as microfiltration, ultrafiltration, nanofiltration or reverse osmosis can be circulated and cleaned for a long time at appropriate cleaning water temperature and pressure, thereby improving the cleaning efficiency, extending the service life of the membrane, and collecting or reusing the cleaning waste liquid to save operating costs.

[0073] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0074] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] The above is a detailed introduction to a circulation cleaning system for a pressure membrane provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A circulation cleaning system for a pressure membrane, characterized in that: include: A cleaning water tank (1), wherein the cleaning water tank (1) is provided with a stirring device (2) for stirring the cleaning liquid, and is also provided with a temperature control device (3) for controlling the temperature of the cleaning liquid; A security filter (4), the input end of the security filter (4) being connected to the output end of the cleaning water tank (1), the security filter (4) being used to filter the cleaning liquid discharged from the cleaning water tank (1), and a variable frequency booster pump (5) being provided between the security filter (4) and the cleaning water tank (1); A pressure membrane tube (6), wherein the input end of the pressure membrane tube (6) is connected to the output end of the security filter (4), and the output end of the pressure membrane tube (6) is connected to the input end of the cleaning water tank (1); The stirring device (2), the temperature control device (3), the safety filter (4) and the variable frequency booster pump (5) are all connected to a controller.

2. The circulating cleaning system for pressure membrane according to claim 1, characterized in that: The temperature control device (3) comprises: a water chiller (31), disposed in the cleaning water tank (1) and connected to the controller, the water chiller (31) being used to reduce the temperature of the cleaning liquid in the cleaning water tank (1); a heat exchanger (32), arranged in the cleaning water tank (1) and connected to the controller, the heat exchanger (32) being used to increase the temperature of the cleaning liquid in the cleaning water tank (1); A thermometer (33) is provided in the cleaning water tank (1) and connected to the controller, wherein the thermometer (33) is used to measure the temperature of the cleaning liquid in the cleaning water tank (1).

3. The circulating cleaning system for pressure membrane according to claim 2, characterized in that: The heat exchanger (32) is provided with a heat exchange valve (34) for controlling the operating state of the heat exchanger (32), and the heat exchange valve (34) is connected to the controller.

4. The circulating cleaning system for pressure membrane according to claim 3, characterized in that: A pressure sensor (7) is provided between the safety filter (4) and the pressure membrane tube (6), and the pressure sensor (7) is connected to the controller.

5. The circulating cleaning system for pressure membrane according to claim 4, characterized in that: A flow component (8) connected to the controller is provided between the pressure sensor (7) and the pressure membrane tube (6), and the flow component (8) is used to monitor and control the flow rate of the cleaning liquid in real time.

6. The circulating cleaning system for pressure membrane according to claim 5, characterized in that: The flow assembly (8) comprises a flow meter and a flow control valve both connected to the controller, the flow meter being used to monitor the flow of the cleaning liquid in real time, and the flow control valve being used to control the flow rate of the cleaning liquid in real time.

7. The circulating cleaning system for pressure membrane according to claim 6, characterized in that: A circulation valve (10) is provided on the circulation pipeline connecting the pressure membrane tube (6) and the cleaning water tank (1), and the circulation valve (10) is connected to the controller.

8. The circulating cleaning system for pressure membrane according to claim 7, characterized in that: The output end of the pressure membrane tube (6) is also connected to a waste liquid tank (9) via a waste liquid pipeline, and the waste liquid pipeline is provided with a drain valve (11) connected to the controller.

9. The circulation cleaning system for pressure membrane according to claim 8, characterized in that: The circulation valve (10) and the drain valve (11) are both one-way valves.

10. The pressure membrane circulation cleaning system according to any one of claims 1 to 9, characterized in that: A cleaning water tank control valve (12) is provided on the pipeline connecting the cleaning water tank (1) and the variable frequency booster pump (5), and the cleaning water tank control valve (12) is connected to the controller.

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