Chemical cleaning device for DTRO membrane

Abstract

The utility model provides a DTRO membrane chemical cleaning device which comprises a cleaning box, a flushing assembly is arranged in the cleaning box, and a clamping and fixing assembly is arranged on the upper side in the cleaning box. The low-speed motor drives the double-thread lead screw to rotate forwards, and the displacement seat drives the left clamping plate and the right clamping plate to synchronously move towards the inner side so as to clamp and fix the disc tube type reverse osmosis membrane. Then pumping the diluted hydrochloric acid solution in the liquid storage cavity into the disc tube type reverse osmosis membrane through a first three-way valve, a first connecting pipe, a liquid inlet connecting pipe, a flow dividing pipe and a right clamping plate in sequence by using an acid and alkali resistant pump so as to remove calcium, magnesium and other inorganic salt scales, and after chemical washing, closing the acid and alkali resistant pump and respectively turning the first three-way valve and a second three-way valve; and then the vertical water pump is used for pumping the purified water in the water storage cavity into the disc tube type reverse osmosis membrane through a first three-way valve, a first connecting pipe, a liquid inlet hose, a liquid inlet connecting pipe, a shunt pipe and a right clamping plate in sequence, so that the residual diluted hydrochloric acid solution in the disc tube type reverse osmosis membrane is cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of DTRO membrane cleaning, in particular to a chemical cleaning device for DTRO membranes. Background Technique

[0002] The DTRO membrane (disc tube reverse osmosis membrane) is a form of reverse osmosis and is a membrane module specifically used to treat high-concentration sewage. Its core technology is the disc tube membrane sheet membrane column. Stack the reverse osmosis membrane sheet and the hydraulic guide disc together, fix them with a central pull rod and end plates, and then place them in a pressure-resistant sleeve to form a membrane column. During the use of the DTRO membrane, in order to ensure the filtration performance and service life of the DTRO membrane, a cleaning device is required to disassemble and clean the DTRO membrane regularly.

[0003] During the cleaning process of the DTRO membrane by the existing cleaning device, the staff needs to connect the two ends of the DTRO membrane to the outlet and inlet of the cleaning device with the help of connecting flanges. However, this connection method not only requires the use of screws to connect and fix the connecting flanges, but also has cumbersome disassembly and assembly steps, thus affecting the cleaning efficiency of the DTRO membrane. Moreover, after the existing cleaning device chemically flushes the DTRO membrane, the staff needs to transfer the DTRO membrane to a clear water tank to rinse the residual chemical solution inside with clear water, which increases the labor intensity of the staff and has poor practicability. Content of the Utility Model

[0004] The purpose of the utility model is to provide a chemical cleaning device for DTRO membranes to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A chemical cleaning device for DTRO membranes includes a cleaning tank and a disc tube reverse osmosis membrane. The disc tube reverse osmosis membrane is placed on the upper side inside the cleaning tank. A flushing component is arranged inside the cleaning tank, and the flushing component is used to chemically flush the inside of the disc tube reverse osmosis membrane. A clamping and fixing component is arranged on the upper side inside the cleaning tank, and the clamping and fixing component is used to clamp and fix the disc tube reverse osmosis membrane to prevent the disc tube reverse osmosis membrane from shifting or shaking during the flushing process.

[0007] Preferably, the flushing assembly includes a liquid inlet hose, a liquid inlet connecting pipe, a shunt pipe, a liquid outlet hose, a reflux pipe, an acid and alkali resistant pump, a first three-way valve, a first connecting pipe, a manifold pipe, a liquid outlet connecting pipe and a communicating pipe. A partition is fixedly connected to the lower side inside the cleaning tank. An acid and alkali resistant pump is installed on the lower side of the right end face of the cleaning tank. A first three-way valve is installed at the outlet of the acid and alkali resistant pump. The upper end of the first three-way valve is connected to a first connecting pipe. A reflux pipe is fixedly connected to the lower side of the left end face of the cleaning tank. A second three-way valve is installed at the inlet of the reflux pipe. A second connecting pipe is installed at the upper end of the second three-way valve. A shunt pipe is arranged on the right side of the spiral wound reverse osmosis membrane. The right side of the circumferential side of the shunt pipe is connected to a liquid inlet connecting pipe. A liquid inlet hose is connected between the inlet of the liquid inlet connecting pipe and the outlet of the first connecting pipe. A manifold pipe is arranged on the left side of the spiral wound reverse osmosis membrane. A liquid outlet connecting pipe is arranged on the left side of the circumferential side of the manifold pipe. A liquid outlet hose is connected between the outlet of the liquid outlet connecting pipe and the inlet of the second connecting pipe. Communicating pipes are connected to both the left side of the circumferential side of the shunt pipe and the right side of the circumferential side of the manifold pipe.

[0008] Preferably, a water storage cavity is formed in the upper side inside the cleaning tank, a liquid storage cavity is formed in the lower side inside the cleaning tank, a filter mesh cover is installed on the right side inside the liquid storage cavity, and a vertical water pump is installed on the upper side of the right end face of the cleaning tank.

[0009] Preferably, the clamping and fixing assembly includes a right clamping plate, a left clamping plate, a double-threaded lead screw, a displacement seat, a low-speed motor, a support plate and a guide groove. A support plate is fixedly connected to the upper side inside the cleaning tank. Guide grooves are symmetrically formed in the left and right sides of the upper end face of the support plate. A double-threaded lead screw is installed in the upper side inside the support plate. A low-speed motor is installed at the right end of the double-threaded lead screw. A right clamping plate clamps the right end of the spiral wound reverse osmosis membrane, and a left clamping plate clamps the left end of the spiral wound reverse osmosis membrane. Displacement seats are arranged at the bottoms of both the left clamping plate and the right clamping plate.

[0010] Preferably, the guide groove matches the displacement seat. Limiting cavities are symmetrically formed in the front and rear sides of the inner walls of both the left clamping plate and the right clamping plate. A sealing ring is adhesively bonded to the circumferential side inside the limiting cavity, and the sealing ring matches the spiral wound reverse osmosis membrane. A limiting support seat is fixedly connected to the middle position of the upper end face of the support plate.

[0011] Preferably, a water replenishing valve is installed on the left side of the front end face of the cleaning tank, a drain valve is installed below the water replenishing valve, a liquid replenishing valve is installed below the drain valve, and a liquid discharging valve is installed below the liquid replenishing valve.

[0012] Preferably, observation windows are installed on both the upper and lower sides of the front end face of the cleaning tank, and a maintenance sealing plate is installed on the lower side of the front end face of the cleaning tank, and the maintenance sealing plate is of a detachable structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When cleaning the inside of the spiral wound reverse osmosis membrane, start the acid and alkali resistant pump, so that the acid and alkali resistant pump pumps the dilute hydrochloric acid solution in the liquid storage chamber into the inside of the spiral wound reverse osmosis membrane through the first three-way valve, the first connecting pipe, the liquid inlet connecting pipe, the shunt pipe and the right splint in sequence to remove inorganic salt scaling such as calcium and magnesium. After chemical flushing, turn off the acid and alkali resistant pump and turn the first three-way valve and the second three-way valve respectively. Then start the vertical water pump, so that the vertical water pump pumps the purified water in the water storage chamber into the inside of the spiral wound reverse osmosis membrane through the first three-way valve, the first connecting pipe, the liquid inlet hose, the liquid inlet connecting pipe, the shunt pipe and the right splint to flush the remaining dilute hydrochloric acid solution inside. Thus, it is unnecessary for the staff to transfer the chemically flushed spiral wound reverse osmosis membrane to the clean water tank for flushing, thereby reducing the labor intensity of the staff;

[0015] 2. Before cleaning the inside of the spiral wound reverse osmosis membrane, drive the double-threaded lead screw to rotate forward by the low-speed motor and drive the left splint and the right splint to move synchronously inward through the displacement seat to clamp and fix the spiral wound reverse osmosis membrane, avoiding loosening and leakage of the spiral wound reverse osmosis membrane during the flushing process. Similarly, when controlling the low-speed motor to rotate in reverse, the left splint and the right splint can be moved synchronously outward to release the clamping and fixing of the spiral wound reverse osmosis membrane, so that the staff can take away the flushed spiral wound reverse osmosis membrane, making the disassembly and assembly of the cleaned spiral wound reverse osmosis membrane more convenient. Brief Description of the Drawings

[0016] Figure 1 is the schematic diagram of the main structure of the present utility model;

[0017] Figure 2 is the structural diagram of the flushing component and the clamping and fixing component of the present utility model;

[0018] Figure 3 is the front sectional view of the flushing component and the clamping and fixing component of the present utility model;

[0019] Figure 4 is the partial structural diagram of the flushing component and the clamping and fixing component of the present utility model;

[0020] Figure 5 is Figure 3 the enlarged view of A in

[0021] In the figure: 1. Cleaning tank; 11. Maintenance sealing plate; 12. Observation window; 13. Make-up water valve; 14. Drain valve; 15. Liquid supplement valve; 16. Liquid discharge valve; 2. Flushing assembly; 21. Inlet liquid hose; 22. Inlet liquid connecting pipe; 23. Shunt pipe; 24. Outlet liquid hose; 25. Second connecting pipe; 26. Second three-way valve; 27. Return pipe; 28. Liquid storage cavity; 29. Partition board; 211. Water storage cavity; 212. Filter mesh cover; 213. Acid and alkali resistant pump; 214. First three-way valve; 215. Vertical water pump; 216. First connecting pipe; 217. Manifold pipe; 218. Outlet liquid connecting pipe; 219. Connecting pipe; 3. Clamping and fixing assembly; 31. Right clamping plate; 311. Limiting cavity; 32. Limiting support seat; 33. Left clamping plate; 34. Double-threaded lead screw; 35. Displacement seat; 36. Low-speed motor; 37. Support plate; 38. Guide groove; 4. Disc tube reverse osmosis membrane. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0024] Embodiment 1:

[0025] A DTRO membrane chemical cleaning device includes a cleaning tank 1 and a disc tube reverse osmosis membrane 4. The disc tube reverse osmosis membrane 4 is placed on the upper side inside the cleaning tank 1. The disc tube reverse osmosis membrane 4 is a membrane component specifically used to treat high-concentration sewage. Since the detailed internal structure and working principle of the disc tube reverse osmosis membrane 4 are relatively mature technologies in the prior art, no further elaboration will be made here. A control panel is installed on the right side of the front end face of the cleaning tank 1. The control panel is respectively connected to the low-speed motor 36, the vertical water pump 215, and the acid and alkali resistant pump 213 through wires. The control panel facilitates the staff to respectively control the operation of the low-speed motor 36, the vertical water pump 215, and the acid and alkali resistant pump 213 according to needs. Since the detailed internal structure and working principle of the control panel are relatively mature technologies in the prior art, no further elaboration will be made here.

[0026] A flushing assembly 2 is arranged inside the cleaning tank 1, and the flushing assembly 2 is used for chemically flushing the inside of the disc tube reverse osmosis membrane 4. A clamping and fixing assembly 3 is arranged on the upper side inside the cleaning tank 1, and the clamping and fixing assembly 3 is used for clamping and fixing the disc tube reverse osmosis membrane 4 to prevent the disc tube reverse osmosis membrane 4 from shifting or shaking during the flushing process.

[0027] The flushing assembly 2 includes a liquid inlet hose 21, a liquid inlet connecting pipe 22, a shunt pipe 23, a liquid outlet hose 24, a return pipe 27, an acid and alkali resistant pump 213, a first three-way valve 214, a first connecting pipe 216, a manifold pipe 217, a liquid outlet connecting pipe 218, and a communicating pipe 219. A partition plate 29 is fixedly connected to the lower side inside the cleaning tank 1. The partition plate 29 can separate the water storage cavity 211 and the liquid storage cavity 28. An acid and alkali resistant pump 213 is installed on the lower side of the right end face of the cleaning tank 1. When the acid and alkali resistant pump 213 works, it can pump the dilute hydrochloric acid solution in the liquid storage cavity 28 into the first three-way valve 214. A first three-way valve 214 is installed at the outlet of the acid and alkali resistant pump 213. The first three-way valve 214 facilitates the staff to control the inflow of clean water or dilute hydrochloric acid solution into the first connecting pipe 216. The upper end of the first three-way valve 214 is connected to the first connecting pipe 216. The first connecting pipe 216 facilitates the connection between the first three-way valve 214 and the liquid inlet hose 21. A return pipe 27 is fixedly connected to the lower side of the left end face of the cleaning tank 1. The return pipe 27 can redirect the dilute hydrochloric acid solution discharged from the second three-way valve 26 back to the liquid storage cavity 28 for recycling.

[0028] A second three-way valve 26 is installed at the inlet of the return pipe 27. The left end outlet of the second three-way valve 26 is connected to the inlet of the external wastewater treatment tank through a pipeline. The second three-way valve 26 facilitates the staff to control the outflow of the flushing water or dilute hydrochloric acid solution flowing into the second connecting pipe 25. A second connecting pipe 25 is installed at the upper end of the second three-way valve 26. The second connecting pipe 25 facilitates the connection between the second three-way valve 26 and the liquid outlet hose 24. A shunt pipe 23 is arranged on the right side of the disc tube reverse osmosis membrane 4. The shunt pipe 23 can shunt the flushing water or dilute hydrochloric acid solution diverted by the liquid inlet connecting pipe 22 into the communicating pipe 219 on the right side. The right side of the circumferential side of the shunt pipe 23 is connected to the liquid inlet connecting pipe 22. The liquid inlet connecting pipe 22 facilitates the connection between the shunt pipe 23 and the liquid inlet hose 21. A liquid inlet hose 21 is connected between the inlet of the liquid inlet connecting pipe 22 and the outlet of the first connecting pipe 216. The liquid inlet hose 21 can not only divert the flushing water or dilute hydrochloric acid solution inside the first connecting pipe 216 into the liquid inlet connecting pipe 22, but also has flexibility itself to facilitate the left and right movement of the right clamping plate 31. A manifold pipe 217 is arranged on the left side of the disc tube reverse osmosis membrane 4. The manifold pipe 217 can concentrate and divert the flushing water or dilute hydrochloric acid solution diverted by the connecting pipe on the left side into the liquid outlet connecting pipe 218. A liquid outlet connecting pipe 218 is arranged on the left side of the circumferential side of the manifold pipe 217. The liquid outlet connecting pipe 218 can divert the flushing water or dilute hydrochloric acid solution diverted from the manifold pipe 217 into the liquid outlet hose 24.

[0029] A liquid outlet hose 24 is connected between the outlet of the liquid outlet connecting pipe 218 and the inlet of the second connecting pipe 25. The liquid outlet hose 24 can not only divert the flushing water or dilute hydrochloric acid solution inside the liquid outlet connecting pipe 218 into the second connecting pipe 25, but also has flexibility itself to facilitate the left and right movement of the left splint 33. On the left side of the annular side of the shunt pipe 23 and the right side of the annular side of the manifold pipe 217, communication pipes 219 are connected respectively. The communication pipes 219 facilitate the connection between the shunt pipe 23 and the right splint 31, and the connection between the manifold pipe 217 and the left splint 33. On the upper side inside the cleaning tank 1, a water storage cavity 211 is provided, and a certain amount of purified water is stored inside the water storage cavity 211. The water storage cavity 211 is convenient for storing purified water for flushing. On the lower side inside the cleaning tank 1, a liquid storage cavity 28 is provided, and a certain amount of dilute hydrochloric acid solution is stored inside the liquid storage cavity 28. The liquid storage cavity 28 is convenient for storing dilute hydrochloric acid solution for flushing. A filter mesh cover 212 is installed on the right side inside the liquid storage cavity 28. The filter mesh cover 212 can block large particle insoluble substances in the passing dilute hydrochloric acid solution, avoiding the easy blockage of the acid and alkali resistant pump 213. The filter mesh cover 212 is a detachable structure, and the detachable filter mesh cover 212 is convenient for later replacement.

[0030] On the upper side of the right end face of the cleaning tank 1, a vertical water pump 215 is installed. When the vertical water pump 215 is working, it can pump the purified water in the water storage cavity 211 into the first three-way valve 214. On the left side of the front end face of the cleaning tank 1, a water replenishing valve 13 is installed. The outlet of the water replenishing valve 13 is communicated with the water storage cavity 211, and the inlet of the water replenishing valve 13 is connected with the outlet of an external water storage tank through a pipeline. When the water replenishing valve 13 is opened, it can replenish water into the water storage cavity 211. Below the water replenishing valve 13, a drain valve 14 is installed. The inlet of the drain valve 14 is communicated with the water storage cavity 211, and the outlet of the drain valve 14 is connected with the inlet of an external wastewater treatment tank through a pipeline. When the drain valve 14 is opened, it can discharge the water inside the water storage cavity 211 for replacement. Below the drain valve 14, a liquid replenishing valve 15 is installed. The inlet of the liquid replenishing valve 15 is connected with the outlet of an external dilute hydrochloric acid solution storage tank through a pipeline. When the liquid replenishing valve 15 is opened, it can supplement an appropriate amount of dilute hydrochloric acid solution into the liquid storage cavity 28. Below the liquid replenishing valve 15, a liquid discharge valve 16 is installed. The inlet of the liquid discharge valve 16 is communicated with the liquid storage cavity 28, and the outlet of the liquid discharge valve 16 is connected with the inlet of an external waste liquid treatment tank through a pipeline. When the liquid discharge valve 16 is opened, it can discharge the dilute hydrochloric acid solution inside the liquid storage cavity 28 for replacement. On the upper and lower sides of the front end face of the cleaning tank 1, observation windows 12 are installed. The upper and lower observation windows 12 facilitate the staff to observe the internal conditions of the liquid storage cavity 28 and the water storage cavity 211 in real time. On the lower side of the front end face of the cleaning tank 1, a maintenance sealing plate 11 is installed, and the maintenance sealing plate 11 is a detachable structure. The detachable maintenance sealing plate 11 is convenient for the staff to enter the liquid storage cavity 28 later to disassemble and replace the filter mesh cover 212.

[0031] Embodiment Two:

[0032] On the basis of the first embodiment, in this embodiment, the low-speed motor 36 drives the double-threaded lead screw 34 to rotate forward, and drives the left clamping plate 33 and the right clamping plate 31 to move synchronously inward through the displacement seat 35 to clamp and fix the spiral wound reverse osmosis membrane 4, avoiding loosening and leakage of the spiral wound reverse osmosis membrane 4 during the flushing process. Similarly, when the low-speed motor 36 is reversed, the left clamping plate 33 and the right clamping plate 31 can be moved synchronously outward to release the clamping and fixing of the spiral wound reverse osmosis membrane 4, so that the staff can take away the spiral wound reverse osmosis membrane 4 after flushing, making the disassembly and assembly of the cleaned spiral wound reverse osmosis membrane 4 more convenient.

[0033] The clamping and fixing assembly 3 includes a right clamping plate 31, a left clamping plate 33, a double-threaded lead screw 34, a displacement seat 35, a low-speed motor 36, a support plate 37 and a guide groove 38. The upper side inside the cleaning tank 1 is fixedly connected with a support plate 37. The support plate 37 is connected to the cleaning tank 1 and the limit support seat 32 by welding. The support plate 37 can support the double-threaded lead screw 34 and the limit support seat 32. Guide grooves 38 are symmetrically formed on the left and right sides of the upper end surface of the support plate 37. The guide grooves 38 match the displacement seat 35. The guide grooves 38 can limit and guide the displacement seat 35, avoiding deviation or shaking of the displacement seat 35 during the displacement process. A double-threaded lead screw 34 is installed on the upper side inside the support plate 37. The external threads on the left side of the circumferential side of the double-threaded lead screw 34 and the external threads on the right side of the circumferential side have opposite thread rotation directions. The double-threaded lead screw 34 with opposite thread rotation directions on the left and right sides of the circumferential side can drive the displacement seats 35 on the left and right sides to move synchronously and in opposite directions when rotating. A low-speed motor 36 is installed at the right end of the double-threaded lead screw 34. The low-speed motor 36 can drive the double-threaded lead screw 34 to rotate slowly when working.

[0034] The right end of the disc tube reverse osmosis membrane 4 is clamped by a right clamping plate 31, and the left end of the disc tube reverse osmosis membrane 4 is clamped by a left clamping plate 33. When the right clamping plate 31 and the left clamping plate 33 move synchronously inward, they can clamp and fix the disc tube reverse osmosis membrane 4. Displacement seats 35 are provided at the bottoms of both the left clamping plate 33 and the right clamping plate 31. There are two groups of displacement seats 35, and the two groups of displacement seats 35 have the same specifications. The two groups of displacement seats 35 are connected to the left clamping plate 33 and the right clamping plate 31 by welding respectively. The two groups of displacement seats 35 can support the left clamping plate 33 and the right clamping plate 31. An internal threaded through hole is opened on the lower side inside the displacement seat 35, and the internal threaded through hole is engaged with the double-threaded screw rod 34. The internal threaded through hole facilitates the double-threaded screw rod 34 to drive the displacement seat 35 to move left and right. Limiting cavities 311 are symmetrically opened on the front and rear sides of the inner walls of the left clamping plate 33 and the right clamping plate 31. The limiting cavities 311 facilitate the left and right ends of the disc tube reverse osmosis membrane 4 to be inside the left clamping plate 33 and the right clamping plate 31. A sealing ring is adhesively bonded to the inner circumferential surface of the limiting cavity 311, and the sealing ring is matched with the disc tube reverse osmosis membrane 4. The material of the sealing ring is fluororubber. The sealing ring made of fluororubber makes the sealing between the left clamping plate 33 and the right clamping plate 31 and the left and right ends of the disc tube reverse osmosis membrane 4 better, avoiding leakage during the flushing process of the disc tube reverse osmosis membrane 4. A limiting support seat 32 is fixedly connected to the middle position of the upper end surface of the support plate 37. A semi-circular groove is opened on the upper end surface of the limiting support seat 32, and the semi-circular groove is matched with the disc tube reverse osmosis membrane 4. The limiting support seat 32 with a semi-circular groove opened on the upper end surface can limit and support the disc tube reverse osmosis membrane 4 that is not clamped by the left clamping plate 33 and the right clamping plate 31, avoiding the situation of the disc tube reverse osmosis membrane 4 rolling back and forth during the process of not being clamped and fixed.

[0035] Working principle: When flushing the spiral wound reverse osmosis membrane 4, the operator first opens the water replenishing valve 13 to replenish an appropriate amount of clean water into the water storage cavity 211, then opens the liquid replenishing valve 15 to replenish an appropriate amount of dilute hydrochloric acid solution into the liquid storage cavity 28. Immediately afterwards, the two groups of spiral wound reverse osmosis membranes 4 to be flushed are placed on the upper end surface of the limit support seat 32. At this time, the low-speed motor 36 is controlled to rotate forward through the control panel, so that the low-speed motor 36 drives the double-threaded lead screw 34 to rotate forward and drives the displacement seats 35 on the left and right sides to move synchronously inward. The displacement seat 35 will drive the left clamping plate 33 and the right clamping plate 31 to move synchronously inward to clamp and fix the spiral wound reverse osmosis membrane 4 on the upper end surface of the limit support seat 32. Then, the acid and alkali resistant pump 213 is started, so that the acid and alkali resistant pump 213 pumps the dilute hydrochloric acid solution in the liquid storage cavity 28 to the liquid inlet hose 21 through the first three-way valve 214 and the first connecting pipe 216. The liquid inlet hose 21 will guide the dilute hydrochloric acid solution to the right clamping plate 31 through the liquid inlet connecting pipe 22, the shunt pipe 23 and the right connecting pipe 219 on the right side. At this time, the dilute hydrochloric acid solution entering the inside of the right clamping plate 31 will enter the inside of the spiral wound reverse osmosis membrane 4 to remove inorganic salt scaling such as calcium and magnesium. Immediately afterwards, the flushed dilute hydrochloric acid solution will enter the liquid outlet hose 24 through the left connecting pipe 219, the manifold pipe 217 and the liquid outlet connecting pipe 218. Finally, the dilute hydrochloric acid solution will flow back into the liquid storage cavity 28 again through the second connecting pipe 25, the second three-way valve 26 and the return pipe 27 for recycling, so as to save the usage amount of the dilute hydrochloric acid solution. And the filter screen 212 can block large particle insoluble substances in the passing dilute hydrochloric acid solution to prevent the acid and alkali resistant pump 213 from being easily blocked. When the spiral wound reverse osmosis membrane 4 is chemically flushed with dilute hydrochloric acid solution for the required time, the acid and alkali resistant pump 213 can be turned off and the first three-way valve 214 and the second three-way valve 26 are respectively turned. At this time, the vertical water pump 215 is started, so that the vertical water pump 215 pumps the clean water in the water storage cavity 211 to the inside of the spiral wound reverse osmosis membrane 4 through the first three-way valve 214, the first connecting pipe 216, the liquid inlet hose 21, the liquid inlet connecting pipe 22, the shunt pipe 23 and the right clamping plate 31 to flush it, so as to flush the residual dilute hydrochloric acid solution inside the spiral wound reverse osmosis membrane 4. And the flushed water will flow into the external wastewater treatment pool through the left clamping plate 33, the connecting pipe 219, the manifold pipe 217, the liquid outlet connecting pipe 218, the liquid outlet hose 24, the second connecting pipe 25 and the second three-way valve 26, so as to facilitate the operator to flush the spiral wound reverse osmosis membrane 4 with clean water after chemical flushing. When the spiral wound reverse osmosis membrane 4 is flushed with clean water for the required time, the vertical water pump 215 is turned off and the low-speed motor 36 is controlled to rotate in reverse, so that the low-speed motor 36 drives the double-threaded lead screw 34 to rotate in reverse. At this time, the left clamping plate 33 and the right clamping plate 31 will move synchronously outward to release the clamping and fixing of the spiral wound reverse osmosis membrane 4, so that the operator can take away the flushed spiral wound reverse osmosis membrane 4.

[0036] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A DTRO membrane chemical cleaning device, comprising a cleaning tank (1) and a disc-tube reverse osmosis membrane (4), characterized in that: A disc-tube reverse osmosis membrane (4) is placed on the upper side of the cleaning box (1), a flushing assembly (2) is arranged inside the cleaning box (1), and the flushing assembly (2) is used to chemically flush the inside of the disc-tube reverse osmosis membrane (4), and a clamping and fixing assembly (3) is arranged on the upper side of the cleaning box (1), and the clamping and fixing assembly (3) is used to clamp and fix the disc-tube reverse osmosis membrane (4) to prevent the disc-tube reverse osmosis membrane (4) from being displaced or shaken during the flushing process.

2. A DTRO membrane chemical cleaning device according to claim 1, characterized in that: The flushing assembly (2) comprises a liquid inlet hose (21), a liquid inlet connecting pipe (22), a flow dividing pipe (23), a liquid outlet hose (24), a return pipe (27), an acid-base resistant pump (213), a first three-way valve (214), a first connecting pipe (216), a collecting pipe (217), a liquid outlet connecting pipe (218) and a connecting pipe (219); a partition plate (29) is fixedly connected to the lower side of the interior of the cleaning box (1); an acid-base resistant pump (213) is installed on the lower side of the right end surface of the cleaning box (1); a first three-way valve (214) is installed at the outlet of the acid-base resistant pump (213); the upper end of the first three-way valve (214) is connected to the first connecting pipe (216); a return pipe (27) is fixedly connected to the lower side of the left end surface of the cleaning box (1); a second three-way valve (214) is installed at the inlet of the return pipe (27); A three-way valve (26) is provided on the upper end of the second three-way valve (26), a second connecting pipe (25) is installed, a shunt pipe (23) is provided on the right side of the disc-tube reverse osmosis membrane (4), a liquid inlet connecting pipe (22) is connected to the right side of the annular side of the shunt pipe (23), a liquid inlet hose (21) is connected between the inlet of the liquid inlet connecting pipe (22) and the outlet of the first connecting pipe (216), a collecting pipe (217) is provided on the left side of the disc-tube reverse osmosis membrane (4), a liquid outlet connecting pipe (218) is provided on the left side of the annular side of the collecting pipe (217), a liquid outlet hose (24) is connected between the outlet of the liquid outlet connecting pipe (218) and the inlet of the second connecting pipe (25), and a connecting pipe (219) is connected to the left side of the annular side of the shunt pipe (23) and the right side of the annular side of the collecting pipe (217).

3. A DTRO membrane chemical cleaning device according to claim 1, characterized in that: A water storage chamber (211) is provided on the upper side of the cleaning box (1), a liquid storage chamber (28) is provided on the lower side of the cleaning box (1), a filter screen cover (212) is installed on the right side of the liquid storage chamber (28), and a vertical water pump (215) is installed on the upper side of the right end surface of the cleaning box (1).

4. A DTRO membrane chemical cleaning device according to claim 1, characterized in that: The clamping and fixing assembly (3) comprises a right clamping plate (31), a left clamping plate (33), a double-threaded screw (34), a displacement seat (35), a low-speed motor (36), a support plate (37) and a guide groove (38). The support plate (37) is fixedly connected to the upper side of the interior of the cleaning box (1). The upper end surface of the support plate (37) is symmetrically provided with guide grooves (38) on the left and right sides. The double-threaded screw (34) is installed on the upper side of the interior of the support plate (37). The low-speed motor (36) is installed on the right end of the double-threaded screw (34). The right end of the disc-tube reverse osmosis membrane (4) is clamped by the right clamping plate (31), and the left end of the disc-tube reverse osmosis membrane (4) is clamped by the left clamping plate (33). The bottoms of the left clamping plate (33) and the right clamping plate (31) are both provided with displacement seats (35).

5. A DTRO membrane chemical cleaning device according to claim 4, characterized in that: The guide groove (38) matches the displacement seat (35), and the inner walls of the left clamping plate (33) and the right clamping plate (31) are symmetrically provided with limit cavities (311) on both the front and rear sides. A sealing ring is bonded to the inner annular side surface of the limit cavity (311), and the sealing ring matches the disc-tube reverse osmosis membrane (4). The middle position of the upper end surface of the support plate (37) is fixedly connected to the limit support seat (32).

6. A DTRO membrane chemical cleaning device according to claim 1, characterized in that: A water replenishment valve (13) is installed on the left side of the front end surface of the cleaning box (1), a water discharge valve (14) is installed below the water replenishment valve (13), a liquid replenishment valve (15) is installed below the water discharge valve (14), and a liquid discharge valve (16) is installed below the liquid replenishment valve (15).

7. A DTRO membrane chemical cleaning device according to claim 1, characterized in that: Observation windows (12) are installed on both upper and lower sides of the front end surface of the cleaning box (1), and an inspection sealing plate (11) is installed on the lower side of the front end surface of the cleaning box (1), and the inspection sealing plate (11) is a detachable structure.

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