A reverse osmosis membrane cleaning device

Abstract

The utility model relates to reverse osmosis membrane cleaning technical field, concretely relates to a kind of reverse osmosis membrane cleaning device, including multiple reverse osmosis membrane components, cleaning water tank, low-pressure cleaning pump, cleaning filter and high-pressure detection pump, cleaning water tank is used to configure cleaning liquid medicine and outlet is connected with the import of low-pressure cleaning pump by pipeline, the import of cleaning filter is connected with the outlet of low-pressure cleaning pump by pipeline, the outlet of low-pressure cleaning pump is connected to cleaning water tank by backflow pipe, the dissolution of reagent is accelerated by backflow mode, the import of high-pressure detection pump is connected with the outlet of cleaning filter by pipeline, the outlet of high-pressure detection pump is connected with each reverse osmosis membrane component by first water outlet pipe. Membrane component can be flushed and chemically cleaned, cleaning is more thorough, each membrane membrane component is independently cleaned, and it is not easy to cause secondary pollution, and the cleaning condition of each membrane component can be judged according to multiple indexes after cleaning.

Description

Technical Field

[0001] This utility model relates to the field of reverse osmosis membrane cleaning technology, and specifically to a reverse osmosis membrane cleaning device. Background Technology

[0002] Reverse osmosis technology is a highly efficient water treatment process that uses a semi-permeable membrane to selectively separate solvents and solutes. By applying external pressure to overcome natural osmotic pressure, water molecules permeate from a high-concentration solution to a low-concentration side, achieving desalination, purification, and concentration. After a period of operation, impurities accumulate on one side of the reverse osmosis membrane, causing a decrease in permeation and affecting subsequent water quality. Therefore, cleaning the reverse osmosis membrane is particularly important.

[0003] Reverse osmosis membrane cleaning can be divided into online cleaning and offline cleaning. When the fouling level is low, online cleaning is usually used. The feed water passes through the membrane surface at low pressure and high flow rate to wash away the contaminants. However, when the reverse osmosis membrane is more severely fouled, offline cleaning is required. Online cleaning is not targeted enough and may cause secondary fouling of the membrane; offline cleaning is inefficient and it is difficult to determine the cleaning status of each membrane.

[0004] Therefore, this invention provides a reverse osmosis membrane cleaning device to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a reverse osmosis membrane cleaning device, which effectively solves the problems of poor targeting and incomplete cleaning of online cleaning, which may cause secondary contamination of the membrane, and low efficiency of offline cleaning and difficulty in judging the cleaning status of each membrane.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A reverse osmosis membrane cleaning device includes multiple reverse osmosis membrane modules, a cleaning water tank, a low-pressure cleaning pump, a cleaning filter, and a high-pressure detection pump. The cleaning water tank is used to prepare the cleaning solution, and its outlet is connected to the inlet of the low-pressure cleaning pump via a pipe. The outlet of the low-pressure cleaning pump is connected to the inlet of the cleaning filter via a pipe. The outlet of the low-pressure cleaning pump is connected to the cleaning water tank via a return pipe to accelerate the dissolution of the cleaning solution. The outlet of the cleaning filter is connected to the inlet of the high-pressure detection pump via a pipe. The outlet of the high-pressure detection pump is connected to each reverse osmosis membrane module via a first outlet pipe. Each reverse osmosis membrane module is equipped with a concentrate pipe and a desalination pipe. Each concentrate pipe is equipped with a cleaning pipe and a detection pipe. Each cleaning pipe and detection pipe returns to the cleaning water tank. Each desalination pipe is connected to the cleaning water tank and returns to the cleaning water tank. The desalination and concentrate from each reverse osmosis membrane module are recycled back to the cleaning water tank.

[0007] Preferably, a water inlet conductivity meter is installed on the outlet pipe of the low-pressure cleaning pump, and a fresh water return pipe is connected between the outlet pipe of each reverse osmosis membrane module and the cleaning water tank. A product water conductivity meter is installed on the fresh water return pipe. The product water conductivity meter is used to accurately measure the desalination rate of each reverse osmosis membrane module.

[0008] Preferably, a bypass pipe is connected between the inlet pipe and the outlet pipe of the high-pressure testing pump, and a testing pump bypass valve is installed on the bypass pipe. The testing pump bypass valve is opened during cleaning and closed during testing.

[0009] Preferably, each of the reverse osmosis membrane modules has a reverse osmosis membrane installed inside its membrane housing to prevent secondary contamination. Each reverse osmosis membrane module has a membrane inlet pressure gauge and a membrane inlet valve installed on its inlet pipe. Each concentrate pipe has a membrane outlet pressure gauge installed on its outlet pipe to accurately measure the pressure difference of each reverse osmosis membrane module. Each concentrate pipe has a concentrate cleaning valve installed on its inlet pipe, and each concentrate cleaning valve is connected to a cleaning water tank via a concentrate cleaning return pipe. Each concentrate pipe has an outlet pipe connected to the cleaning water tank via a concentrate detection return pipe, and each concentrate pipe has a concentrate detection valve installed on its outlet pipe.

[0010] Preferably, a concentrate flow meter is installed on the outlet pipe of each concentrate pipe, and a pure water flow meter is installed on each desalination pipe, which can accurately measure the concentrate and desalination flow rates of the reverse osmosis membrane module.

[0011] Preferably, the cleaning water tank, cleaning filter, and reverse osmosis membrane module are each equipped with a drain pipe, each drain pipe is equipped with a drain valve, the cleaning water tank is equipped with a water supply pipe, and the low-pressure cleaning pump, high-pressure detection pump, and the inlet and outlet pipes of the reverse osmosis membrane module are each equipped with a control valve.

[0012] Preferably, a cleaning return valve is installed on the return pipe, each of the cleaning pipes is used for pipe cleaning, and each of the detection pipes is used for pipe detection.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. It can perform flushing and chemical cleaning on membrane modules, resulting in a more thorough cleaning. Each membrane module can be cleaned independently, which is highly targeted and less likely to cause secondary pollution. After cleaning, the cleaning status of each membrane module can be judged based on multiple indicators.

[0014] 2. By simulating the actual operating conditions of the reverse osmosis membrane using a high-pressure testing pump, the influent and effluent water parameters are tested to determine the membrane cleaning effect.

[0015] 3. Each membrane housing contains a reverse osmosis membrane, which can be cleaned and tested independently, preventing secondary contamination that may occur between different membranes.

[0016] 4. The number of items to be cleaned can be flexibly selected, and individual or simultaneous cleaning is possible, which improves convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] The diagram shows the following markings: 1. Reverse osmosis membrane module; 2. Cleaning water tank; 3. Low-pressure cleaning pump; 4. Cleaning filter; 5. High-pressure detection pump; 6. Concentrate pipe; 7. Desalinated water pipe; 8. Permeate conductivity meter; 9. Detection pump bypass valve; 10. Membrane module inlet pressure gauge; 11. Concentrate flow meter; 12. Pure water flow meter; 13. Inlet conductivity meter; 14. Bypass pipe; 15. Membrane module outlet pressure gauge; 16. Return pipe; 17. Cleaning return valve; 18. First outlet pipe; 19. Membrane module inlet valve; 20. Concentrate cleaning valve; 21. Concentrate detection valve; 22. Desalinated water return pipe; 23. Concentrate cleaning return pipe; 24. Concentrate detection return pipe. Detailed Implementation

[0019] The following reference Figure 1 The embodiments of this utility model will be described in detail. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0020] A reverse osmosis membrane cleaning device, such as Figure 1 As shown, the system includes four equidistantly arranged reverse osmosis membrane modules 1, a cleaning water tank 2, a low-pressure cleaning pump 3, a cleaning filter 4, and a high-pressure detection pump 5. The cleaning water tank 2 is used to prepare the cleaning solution. The outlet of the cleaning water tank 2 is connected to the inlet of the low-pressure cleaning pump 3 via a pipe. The outlet of the low-pressure cleaning pump 3 is connected to the inlet of the cleaning filter 4 via a pipe. The outlet of the low-pressure cleaning pump 3 is connected to the cleaning water tank 2 via a return pipe 16 to accelerate the dissolution of the cleaning solution through reflux. The outlet of the cleaning filter 4 is connected to the inlet of the high-pressure detection pump 5 via a pipe. The outlet of the high-pressure detection pump 5 is connected to... The first outlet pipe 18 is connected to the inlet of each reverse osmosis membrane module 1. Each reverse osmosis membrane module 1 is equipped with a concentrate pipe 6 and a desalination pipe 7. Each concentrate pipe 6 is equipped with a cleaning pipe and a testing pipe. Each cleaning pipe is used for pipe cleaning, and each testing pipe is used for pipe testing. Each cleaning pipe and testing pipe is returned to the cleaning water tank 2. Each desalination pipe 7 is connected to the cleaning water tank 2 and returns to the cleaning water tank 2. The desalination and concentrate of each reverse osmosis membrane module 1 are returned to the cleaning water tank 2 for recycling, thus saving water resources.

[0021] A feed water conductivity meter 13 is installed on the outlet pipe of the low-pressure cleaning pump 3. A fresh water return pipe 22 is connected between the outlet pipe of each reverse osmosis membrane module 1 and the cleaning water tank 2. Each fresh water pipe 7 is connected to the cleaning water tank 2 through the fresh water return pipe 22. A product water conductivity meter 8 is installed on the fresh water return pipe 22. The product water conductivity meter 8 is used to accurately measure the desalination rate of each reverse osmosis membrane module 1.

[0022] A bypass pipe 14 is connected between the inlet and outlet pipes of the high-pressure testing pump 5. A testing pump bypass valve 9 is installed on the bypass pipe 14. The testing pump bypass valve 9 is opened during cleaning and closed during testing.

[0023] Each reverse osmosis membrane module 1 has a reverse osmosis membrane installed inside its membrane housing to prevent secondary fouling. Each reverse osmosis membrane module 1 has a membrane inlet pressure gauge 10 and a membrane inlet valve 19 installed on its inlet pipe. The membrane inlet pressure gauge 10 is located on the side of the membrane inlet valve 19. Each concentrate pipe 6 has a membrane outlet pressure gauge 15 installed on its outlet pipe to accurately measure the pressure difference of each reverse osmosis membrane module 1. Each concentrate pipe 6 has a concentrate cleaning valve 20 installed on its inlet pipe. Each concentrate cleaning valve 20 is connected to the cleaning water tank 2 through a concentrate cleaning return pipe 23. Each concentrate pipe 6 has an outlet pipe connected to the cleaning water tank 2 through a concentrate detection return pipe 24. Each concentrate pipe 6 has a concentrate detection valve 21 installed on its outlet pipe.

[0024] Each concentrate pipe 6 is equipped with a concentrate flow meter 11 on its outlet pipe. The concentrate flow meter 11 is located on one side of the concentrate detection valve 21. Each desalination pipe 7 is equipped with a pure water flow meter 12. The concentrate flow meter 11 can accurately measure the concentrate flow rate of the reverse osmosis membrane module 1, and the pure water flow meter 12 can accurately measure the desalination flow rate of the reverse osmosis membrane module 1.

[0025] The cleaning water tank 2, the cleaning filter 4, and the reverse osmosis membrane module 1 are each equipped with a drain pipe, and each drain pipe is equipped with a drain valve. Opening the drain valve allows the dirt to be discharged. The cleaning water tank 2 is equipped with a water supply pipe for replenishing the cleaning water tank 2. The low-pressure cleaning pump 3, the high-pressure detection pump 5, and the inlet and outlet pipes of the reverse osmosis membrane module 1 are each equipped with a control valve. The return pipe 16 is equipped with a cleaning return valve 17.

[0026] Work process: Step 1: Fill the cleaning water tank 2 with clean water. Install the reverse osmosis membranes to be cleaned (the number of reverse osmosis membranes can be selected by yourself, with a maximum of 4 reverse osmosis membranes to be cleaned at the same time) into the corresponding reverse osmosis membrane modules 1. Open the membrane inlet valve 19 and the concentrate cleaning valve 20 of the reverse osmosis membrane module 1 to be cleaned. Turn on the low-pressure cleaning pump 3 to perform low-pressure flushing on each reverse osmosis membrane module 1 for 10 minutes. After flushing, turn off the low-pressure cleaning pump 3 and open the drain valve to empty the cleaning water tank 2 and the reverse osmosis membrane modules 1. Step 2: Refill the cleaning water tank 2 with clean water and test the reverse osmosis membrane module 1 to be cleaned. The testing method is to test each reverse osmosis membrane module 1 in sequence. Open the inlet of reverse osmosis membrane module 1 and the corresponding concentrate detection valve 21. The valves of the other reverse osmosis membrane modules 1 are closed. Turn on the low-pressure cleaning pump 3 and the high-pressure detection pump 5 to test reverse osmosis membrane module 1. Adjust the concentrate detection valve 21 at the concentrate outlet to a pure water flow rate of 0.5 m3 / h. Record the inlet and outlet water pressure, inlet and outlet water conductivity and concentrate flow rate of reverse osmosis membrane module 1. Then repeat the above steps to test the remaining reverse osmosis membrane modules 1 that need to be cleaned in sequence. After the test is completed, empty the cleaning water tank 2 and each reverse osmosis membrane module 1.

[0027] Step 3: Add cleaning agent to cleaning water tank 2. Adjust the amount of agent according to the type of agent selected. Pay attention to the required pH value of the agent solution. Open cleaning return valve 17, and then turn on low-pressure cleaning pump 3 to circulate internally for 10 minutes to ensure that the cleaning agent is completely dissolved. After completion, close cleaning return valve 17.

[0028] Step 4: After the cleaning agent is prepared, open the bypass valve 9 of the detection pump to switch to the bypass pipe, open the inlet valve of the reverse osmosis membrane module 1 that needs to be cleaned and the concentrate cleaning valve 20, turn on the low-pressure cleaning pump 3 to perform circulation cleaning, and soak after 4 hours of circulation. Turn off the low-pressure cleaning pump 3 during soaking, and circulate again after 2 hours of soaking. Repeat the above steps, perform long-term soaking at night, and circulate again in the morning. Adjust the number of circulations according to the fouling of the membrane module. After cleaning, drain the cleaning water tank 2 and each reverse osmosis membrane module 1.

[0029] Step 5: Rinse and test the cleaned membrane modules in the same way as in Step 1 and Step 2. Compare the pressure difference between the inlet and outlet of each reverse osmosis membrane module 1, the difference in conductivity between the inlet and outlet water, and the concentrate flow rate to judge the cleaning effect through multiple indicators.

[0030] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed installation, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A reverse osmosis membrane cleaning device, characterized in that, The system includes multiple reverse osmosis membrane modules (1), a cleaning water tank (2), a low-pressure cleaning pump (3), a cleaning filter (4), and a high-pressure detection pump (5). The cleaning water tank (2) is used to prepare the cleaning solution, and its outlet is connected to the inlet of the low-pressure cleaning pump (3) via a pipe. The outlet of the low-pressure cleaning pump (3) is connected to the inlet of the cleaning filter (4) via a pipe. The outlet of the low-pressure cleaning pump (3) is connected to the cleaning water tank (2) via a return pipe (16) to accelerate the dissolution of the cleaning agent through reflux. The outlet of the cleaning filter (4) is connected to the high-pressure detection pump (5) via a pipe. The outlet of the high-pressure detection pump (5) is connected to each reverse osmosis membrane module (1) through the first outlet pipe (18). Each reverse osmosis membrane module (1) is equipped with a concentrate pipe (6) and a desalination pipe (7). Each concentrate pipe (6) is equipped with a cleaning pipe and a detection pipe. Each cleaning pipe and detection pipe flows back to the cleaning water tank (2). Each desalination pipe (7) is connected to the cleaning water tank (2) and flows back to the cleaning water tank (2). The desalination and concentrate of each reverse osmosis membrane module (1) flow back to the cleaning water tank (2) for recycling.

2. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, A water inlet conductivity meter (13) is installed on the outlet pipe of the low-pressure cleaning pump (3). A fresh water return pipe (22) is connected between the outlet pipe of each reverse osmosis membrane module (1) and the cleaning water tank (2). A product water conductivity meter (8) is installed on the fresh water return pipe (22). The product water conductivity meter (8) is used to accurately measure the desalination rate of each reverse osmosis membrane module (1).

3. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, A bypass pipe (14) is connected between the inlet pipe and the outlet pipe of the high-pressure detection pump (5). A detection pump bypass valve (9) is installed on the bypass pipe (14). The detection pump bypass valve (9) is opened during cleaning and closed during detection.

4. The reverse osmosis membrane cleaning device according to claim 1, characterized in that, Each of the reverse osmosis membrane modules (1) has a reverse osmosis membrane installed in its membrane housing to prevent secondary pollution. Each of the reverse osmosis membrane modules (1) has a membrane inlet pressure gauge (10) and a membrane inlet valve (19) installed on its inlet pipe. Each of the concentrate pipes (6) has a membrane outlet pressure gauge (15) installed on its outlet pipe to accurately measure the pressure difference of each reverse osmosis membrane module (1). Each of the concentrate pipes (6) has a concentrate cleaning valve (20) installed on its inlet pipe. Each of the concentrate cleaning valves (20) is connected to the cleaning water tank (2) through a concentrate cleaning return pipe (23). Each of the concentrate pipes (6) has an outlet pipe connected to the cleaning water tank (2) through a concentrate detection return pipe (24). Each of the concentrate pipes (6) has a concentrate detection valve (21) installed on its outlet pipe.

5. A reverse osmosis membrane cleaning device according to claim 2, characterized in that, Each of the concentrate pipes (6) is equipped with a concentrate flow meter (11) on its outlet pipe, and each of the desalination pipes (7) is equipped with a pure water flow meter (12), which can accurately measure the concentrate and desalination flow rates of the reverse osmosis membrane module (1).

6. A reverse osmosis membrane cleaning device according to claim 2, characterized in that, The cleaning water tank (2), cleaning filter (4), and reverse osmosis membrane module (1) are each equipped with a drain pipe, and each drain pipe is equipped with a drain valve. The cleaning water tank (2) is equipped with a water supply pipe, and the low-pressure cleaning pump (3), high-pressure detection pump (5), and the inlet and outlet pipes of the reverse osmosis membrane module (1) are each equipped with a control valve.

7. A reverse osmosis membrane cleaning device according to claim 4, characterized in that, A cleaning return valve (17) is installed on the return pipe (16). Each of the cleaning pipes is used for pipe cleaning, and each of the detection pipes is used for pipe detection.

Images