Efficient offline cleaning device for single RO (Reverse Osmosis) membrane

Abstract

The efficient single RO membrane off-line cleaning device comprises a cleaning water tank, an RO membrane element and a positioning seat are arranged at the upper end of the cleaning water tank, the upper end of the RO membrane element is sleeved with a pipe sleeve, and the front end of the pipe sleeve is fixedly connected with a water inlet; a circulating cleaning pump is arranged at the front end of the cleaning water tank, the water inlet end of the circulating cleaning pump is fixedly connected with the cleaning water tank through a water inlet pipe, the water outlet end of the circulating cleaning pump is fixedly connected with a water outlet pipe, and the end, away from the circulating cleaning pump, of the water outlet pipe is fixedly connected with a security filter. The upper end of the branch pipe is fixedly connected with a connecting pipe, and one end, far away from the branch pipe, of the connecting pipe is fixedly connected with the water inlet. By using a pipe sleeve insertion type cleaning mode, the operation steps during RO membrane element cleaning are simplified, cleaning liquid is recycled according to the pollution characteristics of the RO membrane element, cleaning is performed in a targeted mode, the cleaning effect is enhanced, the cleaning cost is saved, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reverse osmosis, in particular to a high-efficiency single-branch RO membrane offline cleaning device. Background Art

[0002] Reverse osmosis (RO) technology is the most sophisticated membrane separation technology. It applies an operating pressure greater than the natural osmotic pressure to the concentrated solution, allowing water molecules on the concentrated solution to pass through the membrane and become purified water, effectively intercepting organic matter, colloids, dissolved salts, microorganisms, and other substances in the water. After RO equipment has been operating for a period of time, the membrane surface is prone to fouling and scaling. To ensure the normal operation of the RO system, the membrane system's performance and indicators must be regularly checked, and the RO membrane elements must be cleaned when certain conditions are met.

[0003] The existing offline cleaning technology is to remove the membrane elements in the membrane assembly and install them separately in the pressure vessel of the cleaning system, and then use a pump to pump in acidic or alkaline cleaning liquid. The cleaned liquid returns to the cleaning water tank. However, since the end plates of each pressure vessel need to be disassembled and installed during cleaning, and the membrane elements need to be fixed in the pressure vessel, the operation steps are complicated and time-consuming, so the cleaning efficiency of the existing offline cleaning technology is low. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an efficient single RO membrane offline cleaning device.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: an efficient single-branch RO membrane offline cleaning device, comprising a cleaning water tank, an RO membrane element and a positioning seat are provided at the upper end of the cleaning water tank, the RO membrane element and the positioning seat are each provided in three groups, the RO membrane element is connected to the cleaning water tank via the positioning seat, the upper end of the RO membrane element is provided with a pipe sleeve, and the front end of the pipe sleeve is fixedly connected to the water inlet;

[0006] A circulating cleaning pump is provided at the front end of the cleaning water tank, the water inlet end of the circulating cleaning pump is fixedly connected to the cleaning water tank through an inlet pipe, the water outlet end of the circulating cleaning pump is fixedly connected to the outlet pipe, and the end of the outlet pipe away from the circulating cleaning pump is fixedly connected to a safety filter; the upper part of the side end of the safety filter is fixedly connected to the main pipeline, the upper end of the main pipeline is fixedly connected to a branch pipe, three branch pipes are provided, and electric valves, flow meters and pressure gauges are installed on the branch pipes, and the electric valves, flow meters and pressure gauges are distributed on the branch pipes from bottom to top in sequence, the upper end of the branch pipe is fixedly connected to a connecting pipe, and the end of the connecting pipe away from the branch pipe is fixedly connected to the water inlet.

[0007] As a further description of the above technical solution:

[0008] The connecting pipe is a hose.

[0009] As a further description of the above technical solution:

[0010] A circular notch is provided on the upper end surface of the cleaning water tank, a grate is fixedly connected inside the circular notch, and the grate matches the RO membrane element; the positioning seat is located at the upper end of the circular notch.

[0011] As a further description of the above technical solution:

[0012] A PLC controller is fixedly connected to the side end of the cleaning water tank, and the PLC controller is electrically connected to the circulating cleaning pump and the electric valve respectively.

[0013] As a further description of the above technical solution:

[0014] A stepped hole is provided on the upper end surface of the pipe sleeve, a sealing column is provided inside the stepped hole, the lower end of the sealing column is inserted into the interior of the RO membrane element, and a plug is fixedly connected to the lower end of the sealing column.

[0015] As a further description of the above technical solution:

[0016] The inner arc surface of the positioning seat is provided with a protrusion, and the protrusion corresponds to the groove of the RO membrane element.

[0017] The present invention has the following beneficial effects:

[0018] Compared to existing technologies, this highly efficient single-unit RO membrane offline cleaning device simplifies the cleaning process for R membrane elements by utilizing a sleeve-insertion cleaning method. Based on the contamination characteristics of the R membrane elements, the cleaning fluid is recycled for targeted cleaning, enhancing the cleaning effect. This not only saves cleaning costs but also improves cleaning efficiency. Compared to conventional reverse osmosis offline cleaning devices, this device does not require the use of a pressure vessel or the installation and removal of end plates. It operates using a PLC controller and can simultaneously clean varying numbers of RO membrane elements. Its simple operation effectively improves RO membrane element cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an efficient single RO membrane offline cleaning device proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of an efficient single-branch RO membrane offline cleaning device proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a cleaning water tank for an efficient single-tube RO membrane offline cleaning device proposed by the present invention;

[0022] Figure 4This is a schematic diagram of the structure of an efficient single-tube RO membrane offline cleaning device proposed by the present invention after the tube sleeve and RO membrane element are separated;

[0023] Figure 5 This is a structural schematic diagram of a positioning seat for an efficient single-branch RO membrane offline cleaning device proposed in the present invention.

[0024] Legend:

[0025] 1. Cleaning water tank; 2. Water inlet pipe; 3. Circulating cleaning pump; 4. Water outlet pipe; 5. Safety filter; 6. Main pipeline; 7. Branch pipe; 8. Electric valve; 9. Flow meter; 10. Pressure gauge; 11. Connecting pipe; 12. Circular notch; 13. Pipe sleeve; 14. RO membrane element; 15. Positioning seat; 1501, protrusion; 16. Sealing column; 17. Plug; 18. Step hole; 19. Water inlet; 20. PLC controller; 21. Grate. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 1-5 The present invention provides an efficient single-unit RO membrane offline cleaning device, comprising a cleaning water tank 1, an RO membrane element 14 and a positioning seat 15 are provided at the upper end of the cleaning water tank 1, and the RO membrane element 14 and the positioning seat 15 are each provided with three groups. The RO membrane element 14 is connected to the cleaning water tank 1 through the positioning seat 15, and the upper end of the RO membrane element 14 is provided with a pipe sleeve 13, and the front end of the pipe sleeve 13 is fixedly connected to the water inlet 19;

[0028] A circulating cleaning pump 3 is provided at the front end of the cleaning water tank 1. The water inlet end of the circulating cleaning pump 3 is fixedly connected to the cleaning water tank 1 through the water inlet pipe 2. The water outlet end of the circulating cleaning pump 3 is fixedly connected to the outlet pipe 4. The end of the outlet pipe 4 away from the circulating cleaning pump 3 is fixedly connected to the safety filter 5; the upper part of the side end of the safety filter 5 is fixedly connected to the main pipe 6, and the upper end of the main pipe 6 is fixedly connected to the branch pipe 7. There are three branch pipes 7, and an electric valve 8, a flow meter 9 and a pressure gauge 10 are installed on the branch pipe 7. The electric valve 8, the flow meter 9 and the pressure gauge 10 are distributed on the branch pipe 7 from bottom to top. The upper end of the branch pipe 7 is fixedly connected to the connecting pipe 11, and the end of the connecting pipe 11 away from the branch pipe 7 is fixedly connected to the water inlet 19.

[0029] Specifically, when in use, first install the RO membrane element 14 into the positioning seat 15, then put the pipe sleeve 13 on the upper end of the RO membrane element 14, and then the circulating cleaning pump 3 works. At this time, the cleaning liquid inside the cleaning water tank 1 can be extracted under the action of the water inlet pipe 2, and then enters the security filter 5 through the water outlet pipe 4. The cleaning liquid is filtered through the security filter 5 to filter out impurities in the cleaning liquid. The filtered cleaning liquid enters the main pipeline 6 and then enters the branch pipe 7. Open the electric valve 8 according to the use requirements. At this time, the cleaning liquid inside the branch pipe 7 will flow. When it flows through the flow meter 9, it will The size of the flow rate can be clearly observed. After the cleaning liquid flows out of the branch pipe 7, it enters the interior of the connecting pipe 11 and then enters the interior of the pipe sleeve 13 from the water inlet 19. At this time, the cleaning liquid can clean the RO membrane element 14, so that the waste liquid after cleaning flows directly into the cleaning water tank 1 from the concentrated water flow channel and the water production pipe at the bottom of the RO membrane element 14, thereby realizing the collection of the waste liquid. In this way, when cleaning the RO membrane element 14, the operation steps of cleaning the RO membrane element are simplified. According to the pollution characteristics of the RO membrane element, the cleaning liquid is recycled and targeted cleaning is carried out to enhance the cleaning effect, which not only saves the cleaning cost but also improves the cleaning efficiency.

[0030] The connecting pipe 11 is a hose. During operation, since the connecting pipe 11 is a hose, it is not only convenient for workers to put on the pipe sleeve 13, but the hose can also reduce the pressure shock caused by backwashing.

[0031] A circular notch 12 is provided on the upper end surface of the cleaning water tank 1, and a grate 21 is fixedly connected to the inside of the circular notch 12, and the grate 21 matches the RO membrane element 14; the positioning seat 15 is located at the upper end of the circular notch 12. When working, the circular notch 12 is provided and the grate 21 is installed inside the circular notch 12. Under the action of the grate 21, the RO membrane element 14 can be supported. Since the grate 21 is provided with holes, it is also convenient for the waste water for cleaning the RO membrane element 14 to flow into the inside of the cleaning water tank 1, which is conducive to the recycling of the cleaning liquid, thereby reducing the waste of water resources.

[0032] A PLC controller 20 is fixedly connected to the side end of the cleaning water tank 1. The PLC controller 20 is electrically connected to the circulating cleaning pump 3 and the electric valve 8 respectively. When working, by setting up the PLC controller 20, the circulating cleaning pump 3 and the electric valve 8 are controlled by the PLC controller 20 respectively. At this time, different numbers of RO membrane elements can be cleaned at the same time. The operation steps are simple and the cleaning efficiency of the RO membrane elements is effectively improved.

[0033] A stepped hole 18 is provided on the upper end surface of the pipe sleeve 13, and a sealing column 16 is provided inside the stepped hole 18. The lower end of the sealing column 16 is inserted into the RO membrane element 14, and the lower end of the sealing column 16 is fixedly connected to a plug 17. When working, the sealing column 16 is passed through the stepped hole 18 on the pipe sleeve 13 and inserted into the RO membrane element 14, so that the RO membrane element 14 can be positioned; at the same time, the plug 17 can prevent water from flowing out of the water production pipeline.

[0034] A protrusion 1501 is provided on the inner arc surface of the positioning seat 15, and the protrusion 1501 corresponds to the groove of the RO membrane element 14. When working, the RO membrane element 14 is installed inside the positioning seat 15. Since the protrusion 1501 corresponds to the groove of the RO membrane element 14, the RO membrane element 14 can be positioned.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An efficient single RO membrane offline cleaning device, comprising a cleaning water tank (1), characterized in that: The upper end of the cleaning water tank (1) is provided with an RO membrane element (14) and a positioning seat (15), and the RO membrane element (14) and the positioning seat (15) are each provided with three groups. The RO membrane element (14) is connected to the cleaning water tank (1) via the positioning seat (15). The upper end of the RO membrane element (14) is provided with a pipe sleeve (13), and the front end of the pipe sleeve (13) is fixedly connected to a water inlet (19); A circulating cleaning pump (3) is provided at the front end of the cleaning water tank (1); the water inlet end of the circulating cleaning pump (3) is fixedly connected to the cleaning water tank (1) through a water inlet pipe (2); the water outlet end of the circulating cleaning pump (3) is fixedly connected to a water outlet pipe (4); the end of the water outlet pipe (4) away from the circulating cleaning pump (3) is fixedly connected to a safety filter (5); the upper part of the side end of the safety filter (5) is fixedly connected to a main pipe (6); the upper end of the main pipe (6) is fixedly connected to a branch pipe (7); three branch pipes (7) are provided; an electric valve (8), a flow meter (9) and a pressure gauge (10) are installed on the branch pipe (7); the electric valve (8), the flow meter (9) and the pressure gauge (10) are distributed on the branch pipe (7) in sequence from bottom to top; the upper end of the branch pipe (7) is fixedly connected to a connecting pipe (11); the end of the connecting pipe (11) away from the branch pipe (7) is fixedly connected to the water inlet (19).

2. The efficient single-unit RO membrane off-line cleaning device according to claim 1, characterized in that: The connecting pipe (11) is a hose.

3. The efficient single RO membrane off-line cleaning device according to claim 1, characterized in that: The upper end surface of the cleaning water tank (1) is provided with a circular notch (12), a grate (21) is fixedly connected inside the circular notch (12), and the grate (21) matches the RO membrane element (14); the positioning seat (15) is located at the upper end of the circular notch (12).

4. The efficient single-unit RO membrane off-line cleaning device according to claim 1, characterized in that: A PLC controller (20) is fixedly connected to the side end of the cleaning water tank (1), and the PLC controller (20) is electrically connected to the circulating cleaning pump (3) and the electric valve (8) respectively.

5. The efficient single-unit RO membrane off-line cleaning device according to claim 1, characterized in that: The upper end surface of the pipe sleeve (13) is provided with a stepped hole (18), a sealing column (16) is provided inside the stepped hole (18), the lower end of the sealing column (16) is inserted into the interior of the RO membrane element (14), and the lower end of the sealing column (16) is fixedly connected with a plug (17).

6. The efficient single-unit RO membrane off-line cleaning device according to claim 1, characterized in that: The inner arc surface of the positioning seat (15) is provided with a protrusion (1501), and the protrusion (1501) corresponds to the groove of the RO membrane element (14).

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