Backwashing structure of reverse osmosis membrane

Abstract

The utility model discloses a backwashing structure of a reverse osmosis membrane, which comprises a cleaning water tank, a water pump, a security filter, a forward washing pipeline, a backwashing pipeline, a reverse osmosis membrane main body and a discharge pipe, the input end of the water pump is fixedly connected with one side of the cleaning water tank, and the input end of the security filter is fixedly connected with the output end of the water pump; the positive flushing pipeline and the back flushing pipeline are fixedly mounted at the output end of the security filter, a positive flushing valve is arranged between the positive flushing pipeline and the output end of the security filter, and a back flushing valve is arranged between the back flushing pipeline and the output end of the security filter. According to the utility model, the forward washing pipeline and the back washing pipeline are arranged, so that the reverse osmosis membrane main body can be subjected to forward washing and back washing alternately, impurities on the inner surface of the reverse osmosis membrane are washed away, and the washing effect on the reverse osmosis membrane main body is effectively improved, so that the service life and the washing period of the reverse osmosis membrane are prolonged, and the water production time is prolonged; and the cleaning cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse osmosis membrane cleaning, in particular to a reverse osmosis membrane backwashing structure. Background Art

[0002] Reverse osmosis is a process that relies on reverse osmosis membranes to separate the solvent and solute in a solution under pressure. The development of reverse osmosis membranes is the core technology of this treatment method. It can block all soluble salts and organic matter with a molecular weight greater than 100, but allows water molecules to pass through. It is widely used in seawater and brackish water desalination, boiler water supply, industrial pure water preparation, electronic grade ultrapure water preparation, drinking pure water production, wastewater treatment and special separation processes. After reverse osmosis has been running continuously for a period of time, due to membrane pollution problems, it will lead to related problems such as reduced water production, increased pressure difference, and decreased desalination rate. Membrane pollution mainly includes organic pollution, inorganic pollution, and biological pollution formed by the attachment, growth and reproduction of microorganisms on the membrane surface. Organic matter usually forms a filter cake layer on the membrane surface.

[0003] The existing reverse osmosis cleaning generally adopts the forward cleaning method, that is, the direction of the cleaning water flow is the same as the direction of the water inlet during reverse osmosis operation, and the water flow during cleaning is the same as the pollution layer of the pollutants. Usually, forward cleaning cannot effectively remove the above-mentioned membrane pollution problem, resulting in incomplete cleaning of pollutants, increasing the cleaning time, correspondingly reducing the water production time, increasing costs, and reducing the use efficiency of the membrane. Therefore, it is urgent to design a reverse osmosis membrane backwashing structure to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a backwashing structure for a reverse osmosis membrane to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A reverse osmosis membrane backwashing structure, comprising a cleaning water tank, a variable frequency water pump, a security filter, a forward flushing pipeline, a backwashing pipeline, a reverse osmosis membrane body and a discharge pipe, wherein the input end of the variable frequency water pump is fixedly connected to one side of the cleaning water tank, the input end of the security filter is fixedly connected to the output end of the variable frequency water pump, the forward flushing pipeline and the backwashing pipeline are both fixedly installed at the output end of the security filter, a forward flushing valve is arranged between the forward flushing pipeline and the output end of the security filter, and a valve is arranged between the backwashing pipeline and the output end of the security filter. A backwash valve is arranged between the two sides, one end of the forward washing pipeline is connected to the water inlet of the reverse osmosis membrane body, one end of the backwash pipeline is connected to the water outlet of the reverse osmosis membrane body, one end of the discharge pipe is connected to the sewage pipe of the reverse osmosis membrane body, a discharge pipe valve is arranged between the discharge pipe and the sewage pipe of the reverse osmosis membrane body, a backwash discharge pipe is arranged on one side of the forward washing pipeline, a backwash discharge pipe valve is arranged between the backwash discharge pipe and the forward washing pipeline, and one end of the backwash discharge pipe is fixedly connected to one side of the discharge pipe.

[0007] A first one-way valve is arranged between the backwash pipeline and the water outlet of the reverse osmosis membrane body, a second one-way valve is arranged between the forward wash pipeline and the water inlet of the reverse osmosis membrane body, and a water outlet pipe valve is arranged at the water outlet of the reverse osmosis membrane body.

[0008] A support frame is fixedly installed on the upper side of the cleaning water tank, and a medicine dispensing component is arranged between the support frame and the cleaning water tank.

[0009] The medicine dispensing assembly includes a driving motor, a rotating disk, an electric telescopic rod, a medicine dispensing box and a medicine dispensing pipe. The number of the electric telescopic rod and the medicine dispensing pipe are both four. The driving motor is fixedly mounted on the upper side of the support frame, the rotating disk is fixedly mounted on the output end of the driving motor, the rotating disk is located on the lower side of the support frame, the four electric telescopic rods are fixedly mounted on the lower side of the rotating disk, the medicine dispensing box is fixedly mounted on the output ends of the four electric telescopic rods, the four medicine dispensing pipes are arranged on the lower side of the medicine dispensing box, and the four medicine dispensing pipes are each provided with a medicine dispensing valve.

[0010] Four partitions are arranged in the medicine dispensing box, the medicine outlet pipe is located between two adjacent partitions, a medicine inlet is arranged on the upper side of the cleaning water tank, and the four medicine outlet pipes correspond to the medicine inlet.

[0011] A stirring motor is fixedly mounted on the upper side of the cleaning water tank, and a stirring rod is fixedly mounted on the output end of the stirring motor, and the stirring rod is located in the cleaning water tank.

[0012] In the above technical solution, the utility model provides a reverse osmosis membrane backwashing structure, the beneficial effects are:

[0013] (1) By setting up the forward flushing pipeline and the back flushing pipeline, the reverse osmosis membrane body can be alternately forward flushed and back flushed to flush away the impurities on the inner surface of the reverse osmosis membrane, effectively improving the flushing effect of the reverse osmosis membrane body, thereby extending the service life and cleaning cycle of the reverse osmosis membrane, increasing the water production time, and reducing the cleaning cost.

[0014] (2) By setting up a variable frequency water pump, the flow rate of the water pump can be adjusted by adjusting the speed of the water pump motor, so that the water pump can be adjusted according to the water pressure in the pipeline, thereby avoiding damage to the reverse osmosis membrane due to excessive water pressure and achieving the purpose of energy saving.

[0015] (3) By setting different valves, it is convenient for the staff to control the forward flushing pipeline and the backwashing pipeline, so that it is convenient for the staff to perform forward flushing operations or backwashing pipeline operations on the reverse osmosis membrane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The utility model provides an overall structural schematic diagram of a reverse osmosis membrane backwashing structure embodiment.

[0018] Figure 2 The present invention is a schematic diagram of the overall structure of a medicine packaging assembly provided in an embodiment of a reverse osmosis membrane backwash structure.

[0019] Figure 3 The present invention is a schematic diagram of the cross-sectional structure of a reagent dispensing box provided in an embodiment of the backwash structure of a reverse osmosis membrane.

[0020] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a cleaning water tank provided in an embodiment of the backwash structure of a reverse osmosis membrane.

[0021] 1. Cleaning water tank; 2. Chemical dispensing assembly; 3. Frequency conversion water pump; 5. Safety filter; 6. Forward flushing pipeline; 7. Forward flushing valve; 8. Backwashing pipeline; 9. Backwashing valve; 10. Second non-return valve; 12. Reverse osmosis membrane body; 14. Discharge pipe; 15. Discharge pipe valve; 17. Outlet pipe valve; 18. First non-return valve; 19. Backwashing discharge pipe; 20. Support frame; 21. Driving motor; 22. Rotating disk; 23. Electric telescopic rod; 24. Chemical dispensing box; 25. Drug outlet pipe; 26. Drug outlet valve; 27. Drug inlet; 28. Partition; 29. ​​Stirring motor; 30. Stirring rod. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-4 As shown, a backwashing structure of a reverse osmosis membrane provided by an embodiment of the utility model comprises a cleaning water tank 1, a variable frequency water pump 3, a security filter 5, a forward flushing pipeline 6, a backwashing pipeline 8, a reverse osmosis membrane body 12 and a discharge pipe 14, the input end of the variable frequency water pump 3 is fixedly connected to one side of the cleaning water tank 1, the input end of the security filter 5 is fixedly connected to the output end of the variable frequency water pump 3, the forward flushing pipeline 6 and the backwashing pipeline 8 are both fixedly installed at the output end of the security filter 5, a forward flushing valve 7 is arranged between the forward flushing pipeline 6 and the output end of the security filter 5, a backwashing valve 9 is arranged between the backwashing pipeline 8 and the output end of the security filter 5, one end of the forward flushing pipeline 6 is connected to the water inlet of the reverse osmosis membrane body 12, and the backwashing valve 9 is arranged between the backwashing pipeline 8 and the output end of the security filter 5. One end of the flushing pipeline 8 is connected to the water outlet of the reverse osmosis membrane body 12, one end of the discharge pipe 14 is connected to the sewage pipe of the reverse osmosis membrane body 12, a discharge pipe valve 15 is arranged between the discharge pipe 14 and the sewage pipe of the reverse osmosis membrane body 12, a backwash discharge pipe 19 is arranged on one side of the forward flushing pipeline 6, a backwash discharge pipe valve is arranged between the backwash discharge pipe 19 and the forward flushing pipeline 6, one end of the backwash discharge pipe 19 is fixedly connected to one side of the discharge pipe 14, a first one-way valve 18 is arranged between the backwash pipeline 8 and the water outlet of the reverse osmosis membrane body 12, a second one-way valve 10 is arranged between the forward flushing pipeline 6 and the water inlet of the reverse osmosis membrane body 12, and an outlet pipe valve 17 is arranged at the water outlet of the reverse osmosis membrane body 12.

[0024] Specifically, in this embodiment, by setting the forward flushing pipeline 6 and the backwashing pipeline 8, when forward flushing is performed, the backwashing valve 9, the outlet pipe valve 17 and the backwashing discharge pipe valve are closed, and then the frequency conversion water pump 3 is started to filter the cleaning liquid of the cleaning water tank 1 through the security filter 5, and then the cleaning liquid is transported to the reverse osmosis membrane body 12 through the forward flushing pipeline 6 and the water inlet of the reverse osmosis membrane body 12, and the reverse osmosis membrane body 12 is forwardly cleaned, and then the cleaning water is discharged through the discharge pipe 14. When reverse flushing is performed, the forward flushing valve 7 and the discharge pipe valve 15 are closed, and then the frequency conversion water pump 3 is started to filter the cleaning liquid of the cleaning water tank 1 through the security filter 5. , and then the water is transported to the reverse osmosis membrane body 12 through the backwashing pipeline 8 and the water outlet of the reverse osmosis membrane body 12, and the reverse osmosis membrane body 12 is reversely washed. Then, the flushed water is transported to the discharge pipe 14 through the backwashing discharge pipe 19 and discharged. After the backwashing is completed, it is turned to positive flushing again to flush out the pollutants that have been stripped or become loose after backwashing. The system is flushed, so that the positive flushing and backwashing are performed alternately to flush away the impurities on the inner surface of the reverse osmosis membrane, effectively improving the flushing effect of the reverse osmosis membrane body 12. By adjusting the speed of the variable frequency water pump 3, the flow rate of the water pump is adjusted, thereby avoiding excessive water pressure to damage the reverse osmosis membrane and achieving the purpose of energy saving.

[0025] The utility model provides a reverse osmosis membrane backwashing structure, a support frame 20 is fixedly installed on the upper side of the cleaning water tank 1, a medicine dispensing assembly 2 is arranged between the support frame 20 and the cleaning water tank 1, the medicine dispensing assembly 2 comprises a driving motor 21, a rotating disk 22, an electric telescopic rod 23, a medicine dispensing box 24 and a medicine outlet pipe 25, the number of the electric telescopic rod 23 and the medicine outlet pipe 25 are both four, the driving motor 21 is fixedly installed on the upper side of the supporting frame 20, the rotating disk 22 is fixedly installed on the output end of the driving motor 21, the rotating disk 22 is located on the lower side of the supporting frame 20, and the four electric telescopic rods 23 are fixedly installed on the upper side of the supporting frame 20. On the lower side of the rotating disk 22, a medicine dispensing box 24 is fixedly installed at the output ends of four electric telescopic rods 23, four medicine dispensing pipes 25 are arranged on the lower side of the medicine dispensing box 24, and medicine dispensing valves 26 are arranged in the four medicine dispensing pipes 25. Four partitions 28 are arranged in the medicine dispensing box 24, and the medicine dispensing pipe 25 is located between two adjacent partitions 28. A medicine inlet 27 is arranged on the upper side of the cleaning water tank 1, and the four medicine dispensing pipes 25 correspond to the medicine inlet 27. A stirring motor 29 is fixedly installed on the upper side of the cleaning water tank 1, and a stirring rod 30 is fixedly installed on the output end of the stirring motor 29, and the stirring rod 30 is located in the cleaning water tank 1.

[0026] In another embodiment provided by the utility model, by setting up the medicine dispensing assembly 2 and the stirring rod 30, when preparing the cleaning liquid, the driving motor 21 is started to drive the medicine dispensing box 24 to rotate, and the medicine outlet pipe 25 installed with the medicine needed to be used in the medicine dispensing box 24 is rotated to be aligned with the medicine inlet 27, and then the electric telescopic rod 23 is started to drive the medicine dispensing box 24 to move, and the movement of the medicine dispensing box 24 drives the medicine inlet 27 to move, so that the medicine inlet 27 is inserted into the medicine inlet 27, and then the medicine outlet valve 26 is opened to allow the medicine to enter the cleaning water tank 1 through the medicine inlet 27, so that the user can deliver the required medicine into the cleaning water tank 1 according to the current demand, and then the stirring motor 29 is started to drive the stirring rod 30 to rotate. The rotation of the stirring rod 30 can mix the medicine with the water in the cleaning water tank 1 to form a cleaning liquid. The above steps can be controlled by the control console, so that automatic addition of medicine and mixing of the cleaning liquid can be realized.

[0027] Working principle: By starting the medicine dispensing component 2 and the stirring rod 30, the medicine is added and the cleaning liquid is mixed. Then, the opening and closing of the forward flushing pipeline 6 and the backwashing pipeline 8 are controlled through different valves. The cleaning liquid is filtered through the security filter 5 through the variable frequency water pump 3, and then the reverse osmosis membrane body 12 is alternately forwardly flushed and backwashed through the forward flushing pipeline 6 and the backwashing pipeline 8 to flush away the impurities on the inner surface of the reverse osmosis membrane, effectively improving the flushing effect of the reverse osmosis membrane body 12.

[0028] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reverse osmosis membrane backwashing structure, comprising a cleaning water tank (1), a variable frequency water pump (3), a safety filter (5), a forward flushing pipeline (6), a backwashing pipeline (8), a reverse osmosis membrane body (12) and a discharge pipe (14), characterized in that: The input end of the variable frequency water pump (3) is fixedly connected to one side of the cleaning water tank (1), the input end of the safety filter (5) is fixedly connected to the output end of the variable frequency water pump (3), the forward flushing pipeline (6) and the backwashing pipeline (8) are both fixedly installed at the output end of the safety filter (5), a forward flushing valve (7) is provided between the forward flushing pipeline (6) and the output end of the safety filter (5), a backwashing valve (9) is provided between the backwashing pipeline (8) and the output end of the safety filter (5), one end of the forward flushing pipeline (6) is connected to the reverse osmosis membrane body (12), and the reverse osmosis membrane body (12) is connected to the reverse osmosis membrane body (12). The reverse osmosis membrane body (12) is connected to the water outlet, one end of the backwash pipe (8) is connected to the water outlet of the reverse osmosis membrane body (12), one end of the discharge pipe (14) is connected to the sewage pipe of the reverse osmosis membrane body (12), a discharge pipe valve (15) is provided between the discharge pipe (14) and the sewage pipe of the reverse osmosis membrane body (12), a backwash discharge pipe (19) is provided on one side of the forward flushing pipe (6), a backwash discharge pipe valve is provided between the backwash discharge pipe (19) and the forward flushing pipe (6), and one end of the backwash discharge pipe (19) is fixedly connected to one side of the discharge pipe (14).

2. A reverse osmosis membrane backwashing structure according to claim 1, characterized in that: A first one-way valve (18) is provided between the backwash pipeline (8) and the water outlet of the reverse osmosis membrane body (12), a second one-way valve (10) is provided between the forward flush pipeline (6) and the water inlet of the reverse osmosis membrane body (12), and a water outlet pipe valve (17) is provided at the water outlet of the reverse osmosis membrane body (12).

3. A reverse osmosis membrane backwashing structure according to claim 1, characterized in that: A support frame (20) is fixedly mounted on the upper side of the cleaning water tank (1), and a medicine sub-packaging assembly (2) is provided between the support frame (20) and the cleaning water tank (1).

4. A reverse osmosis membrane backwashing structure according to claim 3, characterized in that: The medicine dispensing assembly (2) comprises a driving motor (21), a rotating disk (22), an electric telescopic rod (23), a medicine dispensing box (24) and a medicine dispensing pipe (25). The number of the electric telescopic rod (23) and the number of the medicine dispensing pipe (25) are both four. The driving motor (21) is fixedly mounted on the upper side of the support frame (20), the rotating disk (22) is fixedly mounted on the output end of the driving motor (21), the rotating disk (22) is located on the lower side of the support frame (20), the four electric telescopic rods (23) are fixedly mounted on the lower side of the rotating disk (22), the medicine dispensing box (24) is fixedly mounted on the output ends of the four electric telescopic rods (23), the four medicine dispensing pipes (25) are arranged on the lower side of the medicine dispensing box (24), and the four medicine dispensing pipes (25) are each provided with a medicine dispensing valve (26).

5. A reverse osmosis membrane backwashing structure according to claim 4, characterized in that: Four partitions (28) are provided in the medicine packaging box (24), and the medicine outlet pipe (25) is located between two adjacent partitions (28). A medicine inlet (27) is provided on the upper side of the cleaning water tank (1), and the four medicine outlet pipes (25) all correspond to the medicine inlet (27).

6. A reverse osmosis membrane backwashing structure according to claim 5, characterized in that: A stirring motor (29) is fixedly mounted on the upper side of the cleaning water tank (1), and a stirring rod (30) is fixedly mounted on the output end of the stirring motor (29), and the stirring rod (30) is located inside the cleaning water tank (1).

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