A reverse osmosis membrane off-line cleaning device

Abstract

The utility model relates to membrane offline cleaning device technical field, concretely relates to a kind of reverse osmosis membrane offline cleaning device, including rack, and rack is provided with cleaning water tank, and cleaning water tank side wall installs test equipment, and cleaning water tank top installs circulating stirring valve, cleaning backflow valve and water replenishing valve, and circulating stirring valve is connected cleaning security filter by pipeline, and cleaning security filter side is communicated with cleaning water tank by the pipeline of being provided with cleaning water pump, and cleaning security filter other side is connected the cleaning water inlet side of quick-open quick-mounting RO membrane shell by pipeline, and offline cleaning device supports to each membrane element is carried out performance test, according to pollution type, select specific cleaning agent and cleaning process, cleaning efficiency is improved by more than 50% than online mode, and cleaning water tank and test water tank are set as standby for each other, effectively improve equipment operation stability;Security filter increases backwash, and filter can recover, extend the service life of filter element, reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the technical field of membrane offline cleaning devices, specifically to an offline cleaning device for reverse osmosis membranes. Background Technology

[0002] With the explosive growth of the energy storage market, lithium iron phosphate batteries have formed core competitiveness through "low cost + high safety + technological iteration". Combined with the expansion of demand in both the power and energy storage markets, as well as the scale advantages of China's industrial chain and policy support, they have jointly promoted their rapid development.

[0003] With the development of the lithium iron phosphate battery industry, the expansion of lithium iron phosphate battery production scale has driven a surge in the amount of lithium iron phosphate wastewater to be treated. Membrane treatment is widely used as an important part of lithium iron phosphate wastewater treatment. Due to the high concentration of sulfates, phosphates, iron salts, etc. in the wastewater, it is easy to form insoluble salts and colloids, which leads to scaling on the membrane surface and blockage of membrane pores. At the same time, residual organic matter and colloidal particles in the wastewater may still adhere to the surface of the reverse osmosis membrane after passing through the ultrafiltration membrane, forming a biofilm or gel layer, resulting in serious fouling of the membrane elements.

[0004] Because the treatment scale of ferric phosphate wastewater is large and the membrane elements are severely fouled, during the online cleaning process, the pollutants stripped off may flow into adjacent membrane elements with the cleaning solution, leading to cross-contamination such as the spread of organic matter or flocculated pollution. Utility Model Content

[0005] Technical problems to be solved

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an offline cleaning device for reverse osmosis membranes, which can effectively solve the problems in the existing technology.

[0007] Technical solution

[0008] This utility model provides an offline reverse osmosis membrane cleaning device, including a frame with a cleaning water tank mounted on it. Testing equipment is installed on the side wall of the cleaning water tank. A circulation stirring valve, a cleaning return valve, and a water supply valve are installed on the top of the cleaning water tank. The circulation stirring valve is connected to a cleaning security filter via a pipe. One side of the cleaning security filter is connected to the cleaning water tank via a pipe equipped with a cleaning water pump. The other side of the cleaning security filter is connected to the cleaning inlet side of a quick-opening, quick-installing RO membrane housing via a pipe. The outlet and concentrate sides of the quick-opening, quick-installing RO membrane housing flow back to the testing water tank and the cleaning water tank via pipes equipped with outlet valves and shut-off valves. The outlet of the cleaning water tank is connected to the cleaning water pump via a pipe equipped with an outlet valve.

[0009] Furthermore, the water supply valve is connected to an external water source at the project site via a pipeline, and one end of the quick-opening and quick-installing RO membrane housing is connected to the cleaning and security filter via an inlet pipe.

[0010] Furthermore, the testing equipment includes a heater, a pH meter, a TI thermometer, a cond conductivity meter, and a rotor flow meter, and one end of the cleaning security filter is connected to the cleaning water tank through a concentrated water production pipeline.

[0011] Furthermore, one end of the cleaning water tank is connected to the test water pump via a pipe, and a first valve is installed on the pipe, while a second valve is installed at the front end of the test water pump.

[0012] Furthermore, a circulation stirring valve, a cleaning return valve, and a water replenishment valve are installed on the top of the test water tank, and the circulation stirring valve, the cleaning return valve, and the water replenishment valve are all connected to the cleaning water tank through pipes.

[0013] Furthermore, the test water tank is connected to the inlet of the quick-opening and quick-installation RO membrane housing via a pipe equipped with a test water pump.

[0014] Beneficial effects

[0015] This invention features an offline cleaning device, employing a 12-membrane offline cleaning system, which supports the simultaneous cleaning of 12 membrane elements, thereby improving cleaning efficiency. It is particularly suitable for the offline cleaning of a large number of membrane elements in ferric phosphate wastewater treatment systems. The offline cleaning device supports performance testing of each membrane element, allowing selection of specific cleaning agents and processes based on the type of fouling. Cleaning efficiency is increased by more than 50% compared to online methods. The cleaning water tank and testing water tank are configured as backups for each other, effectively improving equipment operational stability. The security filter incorporates backwashing, enabling filter recovery, extending filter element lifespan, and reducing operating costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the process flow of this utility model;

[0018] Figure 2 This is one of the schematic diagrams of the present invention;

[0019] Figure 3 This is the second structural schematic diagram of the present utility model. Figure 2 back).

[0020] The labels in the diagram represent: 1. Frame; 2. Cleaning water tank; 3. Test water tank; 4. Cleaning water pump; 5. Security filter; 6. Inlet pipe; 7. Quick-opening RO membrane housing; 8. Test water pump; 9. Concentrate product water pipe; 10. Test equipment; 11. Third valve; 12. Outlet valve; 23. Outlet valve; 24. Shut-off valve; 25. Circulation stirring valve; 26. Cleaning reflux valve; 27. Make-up water valve; 28. Circulation stirring valve; 29. ​​Cleaning reflux valve; 30. Make-up water valve; 31. First valve; 32. Second valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example: An offline cleaning device for reverse osmosis membranes, as shown in the attached document. Figure 1 -Appendix Figure 3 The system includes a frame 1, on which a cleaning water tank 2 is mounted. A testing device 10 is installed on the side wall of the cleaning water tank 2. A circulating stirring valve 25, a cleaning return valve 26, and a water supply valve 27 are installed on the top of the cleaning water tank 2. The circulating stirring valve 25 is connected to a cleaning security filter 5 through a pipe. One side of the cleaning security filter 5 is connected to the cleaning water tank 2 through a pipe equipped with a cleaning water pump 4. The other side of the cleaning security filter 5 is connected to the cleaning inlet side of a quick-opening and quick-installing RO membrane housing 7 through a pipe. The outlet side and the concentrate side of the quick-opening and quick-installing RO membrane housing 7 flow back to the testing water tank 3 and the cleaning water tank 2 through a pipe equipped with an outlet valve 23 and a shut-off valve 24. The outlet of the cleaning water tank 2 is connected to the cleaning water pump 4 through a pipe equipped with an outlet valve 12.

[0024] The water supply valve 27 is connected to the external water source of the project site through a pipeline. One end of the quick-opening and quick-installing RO membrane housing 7 is connected to the cleaning and security filter 5 through the water inlet pipe 6. The test equipment 10 includes a heater, pH meter, TI thermometer, cond conductivity meter and rotor flow meter. One end of the cleaning and security filter 5 is connected to the cleaning water tank 2 through the concentrate product water pipe 9. One end of the cleaning water tank 2 is connected to the test water pump 8 through a pipeline, and a first valve 31 is installed on the pipeline, and a second valve 32 is installed at the front end of the test water pump 8. The top of the test water tank 3 is equipped with a circulation stirring valve 28, a cleaning return valve 29 and a water supply valve 30. The circulation stirring valve 28, the cleaning return valve 29 and the water supply valve 30 are all connected to the cleaning water tank 2 through pipelines. The test water tank 3 is connected to the water inlet of the quick-opening and quick-installing RO membrane housing 7 through a pipeline equipped with the test water pump 8.

[0025] Therefore, this device can be used by following these steps:

[0026] Preparation: Check that the equipment, connecting pipes, and valves inside the device are intact and that the valves are in the correct position. Add the specific cleaning agent to the manhole at the top of the cleaning tank 2, and simultaneously open the water supply valve 27 to add water into the cleaning tank 2. Simultaneously start the cleaning water pump 4, open valves 11 and 14, and the circulation stirring valve 25, and close valves 15, 16, and 17 to stir and mix the water and cleaning agent in the cleaning tank 2. The thermometer can be used to determine whether to turn on the testing device 10 for heating. After the cleaning agent passes the test instrument, close the circulation stirring valve 25, and you are ready to begin the cleaning process.

[0027] Cleaning process: First, check if the temperature and concentration of the prepared cleaning agent meet the requirements. Place the membrane elements to be cleaned into the quick-opening membrane housing 7 (up to 12 membrane elements can be cleaned). Open the third valve 11, cleaning pump 4, and valves 14, 15, 17, 22, 23, 24, and 18 to inject the cleaning agent into the membrane unit and begin circulating cleaning until the cleaning process is complete.

[0028] Filter backwashing: After a period of time, the filter element of the security filter 5 will become contaminated. At this time, close valves 14 and 17, turn on the cleaning water pump 4, and open valves 15 and 16 to backwash the security filter 5. The backwash wastewater will be discharged from valve 15. This can extend the service life of the filter element.

[0029] Testing Procedure: After cleaning is completed, close valves 17 and 18, turn on test water pump 8, and open first valve 31, second valve 32, and 19. The cleaning effect of the membrane element 7 can be tested by observing the inlet and outlet water on the online monitoring instrument. Multiple membrane elements can be tested simultaneously, or a single membrane element can be tested. Cleaning water tank 2 and test water tank 3 serve as backups for each other. Test water tank 3 can also be operated in the same manner as above.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An offline cleaning device for reverse osmosis membranes, characterized in that: The system includes a frame (1), on which a cleaning water tank (2) is installed. A test device (10) is installed on the side wall of the cleaning water tank (2). A circulating stirring valve (25), a cleaning return valve (26), and a water supply valve (27) are installed on the top of the cleaning water tank (2). The circulating stirring valve (25) is connected to a cleaning security filter (5) through a pipe. One side of the cleaning security filter (5) is connected to the cleaning water tank (2) through a pipe equipped with a cleaning water pump (4). The other side of the cleaning security filter (5) is connected to the cleaning inlet side of a quick-opening and quick-installing RO membrane housing (7) through a pipe. The outlet side and the concentrate side of the quick-opening and quick-installing RO membrane housing (7) are returned to the test water tank (3) and the cleaning water tank (2) through a pipe equipped with an outlet valve (23) and a shut-off valve (24). The outlet of the cleaning water tank (2) is connected to the cleaning water pump (4) through a pipe equipped with an outlet valve (12).

2. The reverse osmosis membrane offline cleaning device according to claim 1, characterized in that, The water supply valve (27) is connected to the external water source of the project site through a pipeline, and one end of the quick-opening and quick-installing RO membrane housing (7) is connected to the cleaning and security filter (5) through the water inlet pipe (6).

3. The reverse osmosis membrane offline cleaning device according to claim 1, characterized in that, The test equipment (10) includes a heater, a pH meter, a TI thermometer, a cond conductivity meter and a rotor flow meter. One end of the cleaning security filter (5) is connected to the cleaning water tank (2) through a concentrated water production pipe (9).

4. The reverse osmosis membrane offline cleaning device according to claim 1, characterized in that, One end of the cleaning water tank (2) is connected to the test water pump (8) through a pipe, and a first valve (31) is provided on the pipe, and a second valve (32) is provided at the front end of the test water pump (8).

5. The reverse osmosis membrane offline cleaning device according to claim 4, characterized in that, The test water tank (3) is equipped with a circulating stirring valve (28), a cleaning return valve (29) and a water replenishment valve (30) on its top. The circulating stirring valve (28), the cleaning return valve (29) and the water replenishment valve (30) are all connected to the cleaning water tank (2) through pipes.

6. The reverse osmosis membrane offline cleaning device according to claim 1, characterized in that, The test water tank (3) is connected to the inlet of the quick-opening and quick-installation RO membrane housing (7) via a pipe equipped with a test water pump (8).

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