Reverse osmosis membrane cleaning device

Abstract

The utility model provides a reverse osmosis membrane cleaning device, comprising a mounting frame, on which a first water pump, a second water pump and a filter are fixed; the first water pump is respectively connected to a water tank connecting pipe, a first pipeline and a first connecting pipe of the filter; the first pipeline is connected to a membrane shell water inlet pipeline; the first pipeline is also connected to a second pipeline, and both ends of the second pipeline are connected to the first pipeline; a second valve and a second flow meter are provided in a pipe section between two connections with the second pipeline, and the first pipeline is also connected to a third pipeline; a fourth pipeline is connected to the third pipeline, and both ends of the fourth pipeline are connected to the third pipeline; a fifth valve, a fourth flow meter and a sixth valve are sequentially provided in a pipe section between two connections with the fourth pipeline; the other end of the third pipeline is connected to an annular pipeline, on which a seventh valve, a second water pump and an eighth valve are sequentially provided, and a membrane shell water outlet pipeline is connected to a pipe section between the seventh valve and the second water pump.

Description

Technical Field

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

[0002] The reverse osmosis membrane is the core component of water treatment equipment. The pore size of the reverse osmosis membrane is one millionth of a hair, about 0.0001 microns. Only water molecules and some mineral ions can pass through (the ions passing through have no lossy orientation), and other impurities and heavy metals are discharged, thus achieving a good filtration effect.

[0003] After a period of operation, the reverse osmosis membrane will be clogged and needs to be cleaned to restore a certain filtering effect. In the prior art, a reverse osmosis membrane cleaning device is disclosed in the Chinese utility model patent document with the announcement number CN220091027U. The device inserts the flushing pipe into the central tube of the reverse osmosis membrane for rotational cleaning through the arrangement of structures such as a positioning seat, a baffle, a positioning assembly and an anti-detachment assembly. This cleaning method is physical cleaning, which can only clean the surface and is difficult to clean the internal structure of the membrane. Chemical cleaning can clean the internal structure of the membrane. A reverse osmosis membrane online cleaning device and a cleaning method are disclosed in the Chinese patent application with the publication number CN117430204A, which can realize chemical cleaning, but a cleaning pump and four dosing pumps need to be set in the reverse osmosis membrane online cleaning device, and several ultrasonic generators are also provided. There are many devices, the cost is high, and a large space is required to arrange these devices. Utility Model Content

[0004] In order to solve the above problems, the utility model aims to provide a reverse osmosis membrane cleaning device which has less equipment, reasonable layout and can be chemically cleaned.

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

[0006] The utility model provides a reverse osmosis membrane cleaning device, characterized in that: it comprises a mounting frame, on which a first water pump, a second water pump and a filter are fixed; the first water pump is connected to a water tank through a water tank connecting pipe, the first water pump is connected to the filter through a first connecting pipe of the filter, and the first water pump is also connected to a first pipeline; the first pipeline is connected to a membrane shell water inlet pipeline, and a plurality of membrane shell water inlet connecting pipes are connected to the membrane shell water inlet pipeline, and the membrane shell water inlet connecting pipe is used to be connected to the water inlet of the reverse osmosis membrane; the first pipeline is also connected to a second pipeline, both ends of the second pipeline are connected to the first pipeline, and a first valve and a first flow meter are arranged on the second pipeline; the first pipeline is provided with a second valve and a second flow meter in a pipe section between two connection points with the second pipeline, and is also connected to a third pipeline; the third pipeline is connected to a fourth pipeline, and both ends of the fourth pipeline are connected to the first pipeline. The ends are connected to the third pipeline, and the fourth pipeline is sequentially provided with a third valve, a third flowmeter and a fourth valve; the fourth pipeline is connected to the outlet pipeline in the pipe section between the third valve and the third flowmeter; the third pipeline is sequentially provided with a fifth valve, a fourth flowmeter and a sixth valve in the pipe section between the two connections with the fourth pipeline; the other end of the third pipeline is connected to the annular pipeline, and the seventh valve, a second water pump and an eighth valve are sequentially provided on the annular pipeline; the pipe section of the annular pipeline between the seventh valve and the second water pump is connected to the membrane shell outlet pipeline, and a number of membrane shell outlet connecting pipes are connected to the membrane shell outlet pipeline; the membrane shell water inlet connecting pipe and the membrane shell water inlet connecting pipe are connected to the membrane shell accordingly; the pipe section of the annular pipeline between the eighth valve and the third pipeline is connected to the second connecting pipe of the filter, and the second connecting pipe of the filter is connected to the other end of the filter.

[0007] Furthermore, the reverse osmosis membrane cleaning device provided by the utility model may also have the following feature: wherein a valve is provided on each membrane shell water inlet connecting pipe.

[0008] Furthermore, in the reverse osmosis membrane cleaning device provided by the utility model, it can also have the following characteristics: wherein, a membrane shell installation position is provided on the installation frame, and a plurality of membrane shells are arranged in parallel from top to bottom and placed correspondingly at the membrane shell installation position.

[0009] Furthermore, in the reverse osmosis membrane cleaning device provided by the utility model, it can also have the following characteristics: there are three water tanks, namely a clean water tank, an alkaline agent water tank, and an acidic agent water tank; each water tank is connected to a water tank outlet pipe, and a valve is provided on the water tank outlet pipe; the ends of the three water tank outlet pipes converge into a water tank outlet main pipe, and the water tank outlet main pipe is connected to the water tank connecting pipe.

[0010] Furthermore, in the reverse osmosis membrane cleaning device provided by the utility model, it can also have the following characteristics: wherein, a first pressure gauge is installed on the first connecting pipe of the filter; a second pressure gauge is installed on the filter; a third pressure gauge is installed on the membrane shell water inlet pipe; and a fourth pressure gauge is installed on the membrane shell water outlet pipe.

[0011] Furthermore, in the reverse osmosis membrane cleaning device provided by the utility model, it can also have the following feature: wherein the filter is a bag filter.

[0012] Furthermore, in the reverse osmosis membrane cleaning device provided by the utility model, it can also have the following characteristics: it also includes an electric control box, an electric control box installation position is also provided on the mounting frame, the electric control box is installed at the electric control box installation position, and the first water pump, the second water pump and the filter are electrically connected to the electric control box respectively.

[0013] Beneficial effects of the utility model:

[0014] The reverse osmosis membrane cleaning device provided by the utility model only needs to be provided with two water pumps, combined with a reasonable pipeline layout, and also provided with a bag filter. The reverse osmosis membrane cleaning device of the utility model has a scientific and reasonable structural design, less equipment, low cost, and greatly saves occupied space. The reverse osmosis membrane cleaning device can realize acid and alkali flushing and clean water flushing of the reverse osmosis membrane, and can be washed forward and reversely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the reverse osmosis membrane cleaning device in the embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the pipelines and equipment in the reverse osmosis membrane cleaning device of the embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of a water tank and a water outlet pipe of the water tank in an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the connection of the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, and the water outlet pipeline in the embodiment of the utility model;

[0019] Figure 5 It is a schematic diagram of the connection of the membrane shell water inlet connecting pipe, the membrane shell water outlet connecting pipe, the membrane shell water inlet pipeline, and the membrane shell water outlet pipeline in the embodiment of the utility model;

[0020] Figure 6 It is a schematic diagram of the connection between the first water pump and the filter in the embodiment of the utility model.

[0021] Markings in the figure: 1, mounting frame; 2, first water pump; 3, second water pump; 4, filter; 5, water tank; 6, water tank connecting pipe; 7, first pipeline; 8, second pipeline; 9, third pipeline; 10, fourth pipeline; 11, first connecting pipe of filter; 12, second connecting pipe of filter; 13, membrane shell water inlet pipeline; 14, membrane shell water inlet connecting pipe; 15, membrane shell water outlet pipeline; 16, membrane shell water outlet connecting pipe; 17, first valve; 18, second valve; 19, third valve; 20, the first valve; Four valves; 21. The fifth valve; 22. The sixth valve; 23. The seventh valve; 24. The eighth valve; 25. The first flow meter; 26. The second flow meter; 27. The third flow meter; 28. The fourth flow meter; 29. ​​The outlet pipe; 30. The annular pipe; 31. The valve; 32. The water tank outlet pipe; 33. The valve; 34. The water tank outlet main pipe; 35. The first pressure gauge; 36. The second pressure gauge; 37. The third pressure gauge; 38. The fourth pressure gauge; 39. The electric control box; 40. The membrane shell. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments specifically illustrate the technical solutions of the present invention in conjunction with the accompanying drawings.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0024] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "inner", "outer", "middle", "vertical", "horizontal", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific directions, or to be constructed and operated in specific directions.

[0025] <Example>

[0026] like Figure 1 As shown, a reverse osmosis membrane cleaning device is provided in this embodiment, and the device includes a mounting frame 1, on which a first water pump 2, a second water pump 3, a filter 4 and an electric control box 39 are fixedly mounted.

[0027] See also Figure 1 and Figure 3There are three water tanks 5, namely a clean water tank, an alkaline agent water tank, and an acidic agent water tank, and the water tanks store corresponding cleaning liquids (clean water or agent solutions). Each water tank 5 is connected to a water tank outlet pipe 32, and a valve 33 is provided on the water tank outlet pipe 32. The valve 33 is used to control the outflow of the cleaning liquid in the water tank. The ends of the three water tank outlet pipes 32 converge into a water tank outlet main pipe 34, and the water tank outlet main pipe 34 is connected to a water tank connecting pipe 6. The water tank connecting pipe 6 is connected to the first water pump 2. Preferably, the three water tanks are open water tanks.

[0028] The filter 4 is a bag filter, which has a small size and high filtering efficiency. Figure 1 and Figure 2 The first water pump 2 is connected to one end of the filter 4 through the first filter connecting pipe 11, and the second filter connecting pipe 12 is connected to the other end of the filter 4. The second filter connecting pipe 12 is connected to the annular pipeline 30.

[0029] See also Figure 1 , Figure 2 and Figure 6 The first water pump 2 is also connected to the first pipeline 7. The first pipeline 7 is connected to the membrane shell water inlet pipeline 13, and the membrane shell water inlet pipeline 13 is connected to a plurality of membrane shell water inlet connecting pipes 14, and the membrane shell water inlet connecting pipes 14 are used to connect with the membrane shell 40. A valve 31 is provided on each membrane shell water inlet connecting pipe 14. The other end of the membrane shell 40 is connected to a membrane shell water outlet connecting pipe 16, and a plurality of membrane shell water outlet connecting pipes 16 are connected to the membrane shell water outlet pipeline 15.

[0030] See also Figure 1 , Figure 2 and Figure 4 , the first pipeline 7 is also connected to the second pipeline 8, and both ends of the second pipeline 8 are connected to the first pipeline 7. The second pipeline 8 is provided with a first valve 17 and a first flowmeter 25. The first pipeline 7 is provided with a second valve 18 and a second flowmeter 26 in the pipe section between the two connections with the second pipeline 8, and is also connected to the third pipeline 9. The third pipeline 9 is connected to the fourth pipeline 10, and both ends of the fourth pipeline 10 are connected to the third pipeline 9, and the fourth pipeline 10 is provided with a third valve 19, a third flowmeter 27, and a fourth valve 20 in sequence. The fourth pipeline 10 is connected to a water outlet pipeline 29 in the pipe section between the third valve 19 and the third flowmeter 27. The third pipeline 9 is provided with a fifth valve 21, a fourth flowmeter 28, and a sixth valve 22 in the pipe section between the two connections with the fourth pipeline 10.

[0031] See also Figure 1 and Figure 2 The other end of the third pipe 9 is connected to the annular pipe 30. The annular pipe 30 is provided with a seventh valve 23, a second water pump 3, and an eighth valve 24 in sequence. Figure 1The other end of the membrane housing outlet pipe 15 is connected to the pipe section between the seventh valve 27 and the second water pump 3 of the annular pipe 30. Figure 2 The second filter connecting pipe 12 is connected to the pipe section between the eighth valve 24 and the third pipe 9 of the annular pipe 30 .

[0032] See also Figure 1 The mounting frame 1 is provided with a membrane housing installation position formed by a frame, and a plurality of membrane housings 40 are arranged in parallel from top to bottom and are placed in the membrane housing installation position. In this embodiment, the number of membrane housings 40 is four, but it is not limited thereto. In other embodiments, the number of membrane housings 40 can be set to other numbers, such as five, six, seven, etc.

[0033] See also Figure 1 The mounting frame 1 is also provided with an electric control box installation position, and the electric control box 39 is installed at the electric control box installation position. The first water pump 2, the second water pump 3 and the filter 4 are electrically connected to the electric control box 39 respectively. Preferably, all valves in the reverse osmosis membrane cleaning device of this embodiment use commercially available solenoid valves with manual functions, and each valve is electrically connected to the electric control box 39 respectively. In this way, in addition to manual operation, the staff can also uniformly operate through the electric control box according to needs, thereby improving the operating efficiency.

[0034] See also Figure 2 A first pressure gauge 35 is installed on the first connecting pipe 11 of the filter. A second pressure gauge 36 is installed on the filter 4. A third pressure gauge 37 is installed on the membrane shell water inlet pipe 13. A fourth pressure gauge 38 is installed on the membrane shell water outlet pipe 15.

[0035] The following is an example of a cleaning process to illustrate the working conditions of the reverse osmosis membrane cleaning device of this embodiment:

[0036] The reverse osmosis membrane element to be cleaned is installed in the membrane shell. A stripping agent and water are added to the alkaline agent water tank to prepare an alkaline cleaning agent solution, a chelating agent and water are added to the acidic agent water tank to prepare an acid cleaning agent solution, and a certain amount of clean water is stored in the clean water tank. The cleaning process of the example is carried out in sequence: acid wash, alkaline wash, reverse wash, and clean water wash.

[0037] 1) First, pickling and forward washing are performed. Pickling can dissolve scale and rust. Open the valve 33 corresponding to the acidic agent water tank, start the first water pump 2, open the four valves 31, and the acidic agent flows into the membrane shell water inlet pipe 13 on the water tank connecting pipe 6 and the first pipe 7, and then flows into the membrane shell water inlet connecting pipe 14, enters the membrane shell to perform pickling and forward washing on the reverse osmosis, open the valve 23 and the valve 20 on the fourth pipe 10, and discharge the waste liquid through the outlet pipe 29. After the pickling is completed, close the first water pump 2 and the above valves.

[0038] 2) Then, alkaline washing and backwashing are performed. Alkaline washing can remove organic pollutants and microorganisms. The valve 33 corresponding to the alkaline agent water tank is opened, the second water pump 3 is turned on, and the valve 24 is opened. The alkaline agent flows through the water tank connecting pipe 6, the first filter connecting pipe 11, the filter 4, and the second filter connecting pipe 12, and then flows into the membrane shell outlet pipe 15 through the valve 24 and the second water pump 3, and enters the membrane shell outlet connecting pipe 16 to reversely input the alkaline washing agent solution into the membrane shell. The four valves 31 and the valve 18 on the first pipe 7 and the valve 19 on the fourth pipe are opened to discharge the waste liquid through the outlet pipe 29. After the alkaline washing is completed, the second water pump 3 and the above-mentioned valves are closed.

[0039] 3) After the alkaline washing is completed, clean water is rinsed and washed. The valve 33 corresponding to the clean water tank is opened, the first water pump 2 is turned on, and the four valves 31 are opened. Clean water flows through the water tank connecting pipe 6 and the membrane shell water inlet pipe 13 on the first pipe 7, and then flows into the membrane shell water inlet connecting pipe 14, enters the membrane shell, and performs clean water washing and washing for reverse osmosis. The valve 23 and the valve 20 on the fourth pipe 10 are opened, and the waste liquid is discharged through the outlet pipe 29. After the clean water washing is completed, the first water pump 2 and the above valves are closed.

[0040] During the above-mentioned pickling and alkali cleaning processes, the staff can adjust the pressure in the pipeline by adjusting the pipeline flow to meet the required cleaning pressure. The flow can be adjusted by adjusting the valves on the first pipeline 7, the second pipeline 8, the third pipeline 9 and the fourth pipeline 10. Flow meters are correspondingly provided on the pipelines to observe the flow conditions. In addition, multiple pressure gauges in the device can also facilitate the staff to know the pressure conditions.

[0041] The reverse osmosis membrane cleaning device of this embodiment is not limited to the above cleaning process, and it can also perform acid washing, backwashing, alkaline washing, forward washing, and clean water flushing and backwashing according to actual needs.

[0042] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A reverse osmosis membrane cleaning device, characterized in that: It comprises a mounting frame, on which a first water pump, a second water pump and a filter are fixed; The first water pump is respectively connected to the water tank connecting pipe, the first pipeline, and the first connecting pipe of the filter; The water tank connecting pipe is connected to the water tank; The first filter connecting pipe is connected to the filter; The first pipeline is connected to a membrane shell water inlet pipeline, and the membrane shell water inlet pipeline is connected to a plurality of membrane shell water inlet connecting pipes; The first pipeline is also connected to a second pipeline, both ends of the second pipeline are connected to the first pipeline, and the second pipeline is provided with a first valve and a first flow meter; The first pipeline is provided with a second valve and a second flow meter in the pipe section between the two connections with the second pipeline, and is also connected to a third pipeline; The third pipeline is connected to a fourth pipeline, both ends of the fourth pipeline are connected to the third pipeline, and the fourth pipeline is sequentially provided with a third valve, a third flow meter, and a fourth valve; The fourth pipeline is connected to a water outlet pipeline in a pipe section between the third valve and the third flow meter; The pipe section between the two connections of the third pipe and the fourth pipe is provided with a fifth valve, a fourth flow meter and a sixth valve in sequence; The other end of the third pipeline is connected to the annular pipeline, and the annular pipeline is provided with a seventh valve, the second water pump, and an eighth valve in sequence; The pipe section of the annular pipe between the seventh valve and the second water pump is connected to a membrane shell water outlet pipe, and the membrane shell water outlet pipe is connected to a plurality of membrane shell water outlet connecting pipes; The membrane shell water inlet connecting pipe and the membrane shell water inlet connecting pipe are connected to the membrane shell correspondingly; The pipe section of the annular pipe between the eighth valve and the third pipe is connected with a second filter connecting pipe, and the second filter connecting pipe is connected to the other end of the filter.

2. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: in, Each membrane housing water inlet connecting pipe is provided with a valve.

3. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: in, The mounting frame is provided with a membrane shell mounting position, and a plurality of the membrane shells are arranged in parallel from top to bottom and are correspondingly placed at the membrane shell mounting position.

4. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: in, There are three water tanks, namely a clean water tank, an alkaline agent water tank, and an acid agent water tank; Each water tank is connected to a water tank outlet pipe, and each water tank outlet pipe is provided with a valve; The ends of the three water tank water outlet pipes converge into a water tank water outlet main pipe, and the water tank water outlet main pipe is connected to the water tank connecting pipe.

5. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: in, A first pressure gauge is installed on the first connecting pipe of the filter; A second pressure gauge is installed on the filter; A third pressure gauge is installed on the membrane housing water inlet pipe; The membrane shell water outlet pipeline is installed with a fourth pressure gauge.

6. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: in, The filter is a bag filter.

7. The reverse osmosis membrane cleaning device according to claim 1, characterized in that: It also includes an electric control box. The mounting frame is also provided with an electric control box mounting position. The electric control box is mounted at the electric control box mounting position. The first water pump, the second water pump and the filter are electrically connected to the electric control box respectively.

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