Membrane cleaning mechanism of MBR (Membrane Bioreactor)
By combining air-water cleaning and chemical cleaning, the problem of incomplete removal of contaminants from the membrane surface in MBR membrane bioreactors was solved, achieving a highly efficient membrane cleaning effect and reducing operating costs and energy consumption.
Patent Information
- Application Number
- CN202423076801.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In MBR membrane bioreactors, traditional aeration devices are installed below the membrane bioreactor, resulting in poor membrane fiber vibration, which fails to completely remove pollutants from the membrane surface, affecting filtration efficiency and increasing operating costs.
A combined cleaning method of air-water cleaning and chemical cleaning was designed, which promotes membrane fiber vibration through air-water oscillation and combines it with a chemical cleaning mechanism that uses cleaning fluid to decompose pollutants by flowing backward through the membrane micropores.
It effectively removes contaminants from the membrane surface, keeps the membrane clean, extends the membrane's lifespan, reduces the frequency of chemical cleaning and operating costs, and improves filtration efficiency and flux.
Smart Images
Figure CN223592518U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to MBR membrane bioreactor technical field, specifically related to a membrane cleaning mechanism of MBR membrane bioreactor. BACKGROUND
[0002] MBR (membrane bioreactor) as a kind of efficient, stable wastewater treatment technology, has been widely applied.MBR system carries out solid-liquid separation to sewage by membrane module, effectively removes suspended particles, floc and organic impurities in water, improves effluent water quality.
[0003] However, in the operation process of MBR system, membrane module is easily polluted, leading to the decline of filtration efficiency, thereby affecting the stability and treatment effect of system.MBR membrane module is easily polluted in the operation process, leading to the decline of filtration efficiency.In order to maintain the efficient operation of system, membrane module needs to be cleaned regularly, and the traditional membrane cleaning method is to set aeration device below MBR membrane bioreactor, and such aeration device is not good at membrane filament shaking or mutual scrubbing between membrane filaments, therefore, it can not completely remove pollutants on membrane surface, leading to the decline of filtration efficiency, and due to poor cleaning effect, chemical cleaning needs to be frequently carried out, increasing operating cost.
[0004] Therefore, it is necessary to provide a membrane cleaning mechanism of MBR membrane bioreactor to clean MBR membrane module. UTILITY MODEL CONTENT
[0005] The present application aims to solve the technical problem that the aeration device in the prior art is installed below MBR membrane bioreactor, and such aeration device is not good at membrane filament shaking or mutual scrubbing between membrane filaments, and can not completely remove pollutants on membrane surface.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] A membrane cleaning mechanism of MBR membrane bioreactor, comprising rack, gas-water cleaning mechanism and chemical cleaning mechanism;
[0008] Rack is installed with several groups of hollow fiber membrane module made of PVDF as membrane material;
[0009] Gas-water cleaning mechanism is arranged in hollow fiber membrane module, and circulation flow of fluid in reactor is promoted by gas-water oscillation, membrane filament shaking or mutual scrubbing between membrane filaments is caused to clean hollow fiber membrane module, and gas-water cleaning mechanism comprises air pump, air inlet manifold connected with air pump, gas distribution pipe connected with air inlet manifold, several inverted U-shaped air pipe lines inserted between adjacent two groups of hollow fiber membrane module and connected with gas distribution pipe and aeration disc uniformly distributed on inverted U-shaped air pipe line;
[0010] The chemical cleaning mechanism is used to reverse the flow of the specified chemical solution from the treated water pipe to the inside of the hollow fiber membrane on the hollow fiber membrane module, and permeate to the raw water side through the membrane micropore, decompose the organic matter attached to the membrane surface, restore the transmembrane pressure difference, and the chemical cleaning mechanism includes a chemical cleaning tank and a liquid supply pump for pumping the chemical solution in the chemical cleaning tank into the treated water pipe.
[0011] Through regular air-water cleaning and chemical cleaning, the pollutants on the membrane surface can be effectively removed, the membrane is kept clean, and the filtration efficiency and flux are maintained at a high level. Regular cleaning can reduce the wear and chemical corrosion of the membrane material, prolong the service life of the membrane. The cleaned membrane module requires a lower transmembrane pressure difference, so the pumping energy consumption can be reduced. The cleaning mechanism ensures the filtration performance of the membrane module, thereby improving the quality of the treated water. Efficient air-water cleaning can reduce the frequency of chemical cleaning, thereby reducing the use of chemical agents and operating costs. The cleaning mechanism can be integrated with the control system to achieve automatic control, improve the convenience of operation and the stability of the system.
[0012] As a preferred, the hollow fiber membrane module includes a plurality of membrane filaments and a water outlet pipe fixed to the upper and lower ends of the membrane filaments and connected to the membrane filaments, and a fixed pipe, both ends of the fixed pipe are sealed and positioned on the side support plate provided on the rack through the socket seal and the screw rod cooperation.
[0013] As a preferred, the socket seal includes a plug-in ring inserted into the port of the fixed pipe, two sealing rings A and one sealing ring B sleeved on the outer side of the plug-in ring, a locking block with an internally threaded hole fixed on the inner side of the plug-in ring and protruding from the plug-in ring, and the sealing ring B is located at the port of the plug-in ring and on the outer side of the locking block.
[0014] As a preferred, the side support plate is fixed to the rack by bolts, a circular groove is provided on the inner side of the side support plate to accommodate the locking block, and a hidden thread port is provided on the side support plate and connected to the circular groove and the screw thread.
[0015] The screw rod is screwed into the internally threaded hole of the socket seal after penetrating the hidden thread port, thereby locking and fixing the socket seal on the side support plate, and the socket seal is inserted into the port of the fixed pipe.
[0016] Through the design of the socket seal and the sealing ring, the sealing between the water outlet pipe of the membrane module and the fixed pipe is ensured, and leakage is prevented. The design of the socket seal and the screw rod makes the installation and replacement of the membrane module simple, reduces the difficulty and time of maintenance. The connection of the locking block and the screw rod increases the mechanical strength of the module, ensuring the stability during operation. Due to the good sealing and fixing effect, the downtime caused by leakage or module damage is reduced, thereby reducing the operating cost.
[0017] As a preferred, the two ends of the water outlet pipe are fixed on the upper limiting frame and the lower supporting plate of the rack by threads respectively. The limiting support of the fixed frame and the supporting plate helps to ensure the firm positioning of the water outlet pipe, avoids the shaking during operation, and improves the stability of the system.
[0018] As a preferred, the two ends of the fixed pipe are fixed on the bracket support of the rack by threads respectively. The bracket support provides an additional fixing point, enhances the support force of the fixed pipe, and reduces the damage caused by water flow impact and vibration.
[0019] As a preferred, one end of the inverted U-shaped air pipeline is connected with the air distribution pipe, and the other end is connected with the double-head sealing pipe. The air distribution pipe and the double-head sealing pipe are fixed on the rack by pipe clamps A respectively. The design of the pipe clamps A makes the installation, disassembly and maintenance of the pipeline more convenient.
[0020] As a preferred, the air inlet manifold is fixed on the rack by pipe clamps B. The pipe clamps B provide a firm fixing method to ensure that the air inlet manifold remains stable during operation.
[0021] As a preferred, the treated water pipe includes an outlet manifold, a bidirectional water distribution pipe connected to the outlet manifold, and two water collection pipes connected to the bidirectional water distribution pipe. The two ends of the outlet pipe are connected to the two water collection pipes through elbow pipes respectively. The two water collection pipes and the bidirectional water distribution pipe are fixed on the rack by pipe clamps C.
[0022] As a preferred, a three-way valve is provided on the outlet manifold. The other two ports of the three-way valve are connected to the clean water pipe and the liquid supply pipe respectively. The liquid supply pipe is connected to the liquid supply pump. The three-way valve allows the operator to switch the water flow direction as needed, realizing flexible distribution of water flow, such as switching between different operation modes such as normal filtration, cleaning and discharge.
[0023] Compared with the prior art, the technical effects and advantages of the utility model are:
[0024] The membrane cleaning mechanism of the MBR membrane bioreactor combines air-water cleaning and chemical cleaning. The air-water cleaning mechanism provides compressed air through an air pump. The inverted U-shaped air pipeline is inserted between the adjacent two groups of hollow fiber membrane assemblies, so that the air bubble is formed on the aeration disc, causing the water to flow and oscillate, and the membrane wire on the membrane assembly is shaken, realizing physical cleaning. The chemical cleaning mechanism pumps the cleaning solution into the treated water pipe through the liquid supply pump, so that the cleaning liquid flows reversely through the hollow fiber membrane and penetrates to the raw water side through the membrane micropore, chemically decomposes the organic pollutants on the membrane surface, and restores the filtration performance of the membrane. The combination of the two cleaning methods effectively removes the pollutants on the membrane surface and maintains the cleanliness of the membrane.
[0025] By regular air-water cleaning and chemical cleaning, the pollutants on the membrane surface can be effectively removed, the membrane is kept clean, and thus the high filtration efficiency and flux are maintained. Regular cleaning can reduce the abrasion and chemical corrosion of the membrane material, prolong the service life of the membrane. The cleaned membrane assembly requires a lower transmembrane pressure difference, and thus the pumping energy consumption can be reduced and the operation efficiency is improved. Meanwhile, the design of the cleaning mechanism improves the sealing and stability of the membrane assembly, reduces the possibility of leakage and damage, and reduces the operation cost.
[0026] The operator can switch the water flow direction as needed to realize flexible distribution of the water flow, and switch among different operation modes such as normal filtration, cleaning and discharge. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a structural schematic view of the utility model;
[0028] Figure 2 It is a top view of the utility model;
[0029] Figure 3 It is a structural schematic view of the hollow fiber membrane assembly in the utility model;
[0030] Figure 4 It is a structural schematic view of the air-water cleaning mechanism in the utility model;
[0031] Figure 5 It is an exploded view of the side support plate, the fixed tube and the screw rod in the utility model;
[0032] Figure 6 It is a structural schematic view of the socket sealing element in the utility model.
[0033] In the figure: 1, rack; 2, hollow fiber membrane assembly; 21, membrane filament; 22, water outlet pipe; 23, fixed tube; 3, air inlet main pipe; 4, air distribution pipe; 5, inverted U-shaped air pipe; 6, aeration disc; 7, double-head sealing pipe; 8, socket sealing element; 81, plug-in ring; 82, sealing ring A; 83, sealing ring B; 84, internal thread hole; 85, locking block; 9, screw rod; 10, side support plate; 101, circular groove; 102, invisible thread port; 11, upper limiting frame; 12, lower supporting plate; 13, bracket; 14, pipe clamp A; 15, pipe clamp B; 16, water outlet main pipe; 17, bidirectional water distribution pipe; 18, water collecting pipe; 19, elbow pipe; 20, pipe clamp C; 31, three-way valve; 32, clean water pipe; 33, liquid supply pipe. DETAILED DESCRIPTION
[0034] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Figures 1-6 The present application will be further described in detail,
[0036] The present application discloses a membrane cleaning mechanism of an MBR (Membrane Bioreactor), which comprises a rack 1, a gas-water cleaning mechanism and a chemical cleaning mechanism.
[0037] The rack 1 is provided with a plurality of hollow fiber membrane assemblies 2 made of PVDF as membrane material.
[0038] The hollow fiber membrane assembly 2 comprises a plurality of membrane filaments 21, water outlet pipes 22 fixed on the upper and lower ends of the membrane filaments 21 and in communication with the membrane filaments 21, and fixed pipes 23. The hollow fiber membrane assembly 2 is installed in the vertical direction of the membrane filaments 21, and the fiber is ensured to have a certain slack. There is a slack allowance of 10-20 mm between the upper and lower ends of the membrane filaments 21, which facilitates the shaking of the membrane filaments 21 or the mutual scrubbing and cleaning of the membrane filaments 21.
[0039] The upper and lower sides of the two ends of the water outlet pipe 22 are respectively fixed on the upper limiting frame 11 and the lower supporting plate 12 of the rack 1 by threads. The limiting support of the fixed frame and the supporting plate helps to ensure the firm positioning of the water outlet pipe 22, avoids the shaking in the running process, and improves the stability of the system. The two ends of the fixed pipe 23 are respectively fixed on the bracket 13 of the rack 1 by threads. The support of the bracket 13 provides an additional fixing point, enhances the support force of the fixed pipe 23, and reduces the damage caused by water flow impact and vibration.
[0040] The two ends of the fixed pipe 23 are sealed and positioned on the side support plate 10 provided on the rack 1 by the cooperation of the socket sealing element 8 and the screw rod 9.
[0041] The socket sealing element 8 comprises a plug-in ring 81 inserted into the port of the fixed pipe 23, two sealing rings A 82 and one sealing ring B 83 sleeved on the outer side surface of the plug-in ring 81, a locking block 85 with an internal threaded hole 84 fixed on the inner side surface of the plug-in ring 81 and protruding from the plug-in ring 81, and the sealing ring B 83 is located in the port of the plug-in ring 81 and on the outer side surface of the locking block 85.
[0042] The side plate 10 is fixed on the frame 1 by bolts, and a circular groove 101 is formed on the inner side of the side plate 10 for inserting the locking block 85. A hidden thread port 102 is formed on the side plate 10 and is connected with the circular groove 101 and the screw rod 9.
[0043] The screw rod 9 is screwed into the hidden thread port 102 and is connected with the inner thread hole 84 of the socket sealing element 8, so as to lock and fix the socket sealing element 8 on the side plate 10. The socket sealing element 8 is inserted into the port of the fixed pipe 23.
[0044] The design principle of the sealing and fixing mechanism of the hollow fiber membrane module 2 is to realize reliable sealing and fixing of the membrane module through a series of mechanical structures. The two ends of the membrane filament 21 are connected with the water outlet pipe 22 and the fixed pipe 23 respectively, forming the basic structure of the membrane module. The two ends of the fixed pipe 23 are sealed by the socket sealing element 8. The plug-in ring 81 is inserted into the port of the fixed pipe 23, and the sealing ring A 82 and the sealing ring B 83 are sleeved on the outer side of the plug-in ring 81, playing a sealing role. The locking block 85 is fixed on the inner side of the plug-in ring 81 and protrudes from the plug-in ring 81, and has an inner thread hole 84 for connecting with the screw rod 9.
[0045] The side plate 10 is fixed on the frame 1 by bolts, and a circular groove 101 is formed on the inner side of the side plate 10 for inserting the locking block 85. A hidden thread port 102 is formed on the side plate 10 and is connected with the circular groove 101 and the screw rod 9. By tightening the screw rod 9, the socket sealing element 8 is locked and fixed on the side plate 10, and is inserted into the port of the fixed pipe 23, realizing sealing and fixing.
[0046] Through the design of the socket sealing element 8 and the sealing ring, the sealing between the water outlet pipe 22 and the fixed pipe 23 of the membrane module is ensured, and leakage is prevented. The design of the socket sealing element 8 and the screw rod 9 makes the installation and replacement of the membrane module simple, reducing the difficulty and time of maintenance. The connection of the locking block 85 and the screw rod 9 increases the mechanical strength of the module, ensuring the stability during operation. Due to the good sealing and fixing effect, the downtime caused by leakage or damage of the module is reduced, thereby reducing the operation cost.
[0047] The air-water cleaning mechanism is arranged inside the hollow fiber membrane module 2, which promotes the circulation of the fluid in the reactor by air-water oscillation, causes the membrane filament 21 on the hollow fiber membrane module 2 to shake or the membrane filament 21 to rub against each other, so as to clean the hollow fiber membrane module 2. The air-water cleaning mechanism includes an air pump, an air inlet main pipe 3 connected with the air pump, a gas distribution pipe 4 connected with the air inlet main pipe 3, a plurality of inverted U-shaped air pipes 5 inserted between adjacent two groups of hollow fiber membrane modules 2 and connected with the gas distribution pipe 4, and a gas distribution disc 6 uniformly arranged on the inverted U-shaped air pipe 5.
[0048] The inverted U-shaped air pipeline 5 is inserted between two adjacent groups of hollow fiber membrane modules 2 for aeration. Compared with the conventional aeration device arranged below the MBR membrane bioreactor, the aeration effect is good, and the membrane filaments 21 vibrate or rub against each other, thus achieving good removal effect of pollutants on the membrane surface.
[0049] One end of the inverted U-shaped air pipeline 5 is connected to the air distribution pipe 4, and the other end is connected to the double-head sealing pipe 7. The air distribution pipe 4 and the double-head sealing pipe 7 are fixed to the rack 1 by pipe clamps A14. The design of the pipe clamps A14 makes the installation, disassembly and maintenance of the pipeline system more convenient.
[0050] The air inlet manifold 3 is fixed to the rack 1 by pipe clamps B15. The pipe clamps B15 provide a secure fixing method to ensure that the air inlet manifold 3 remains stable during operation. The pipe clamps B15 help to absorb and reduce vibrations caused by the flow of compressed air. The fixing method of the pipe clamps B15 facilitates quick installation and disassembly of the air inlet manifold 3, improving the maintainability of the system.
[0051] The chemical cleaning mechanism is used to reverse the flow of a specified chemical solution from the treated water pipe to the inside of the hollow fiber membranes on the hollow fiber membrane modules 2, and to penetrate to the raw water side through the membrane micropores, decompose organic matter attached to the membrane surface, and restore the transmembrane pressure difference. The chemical cleaning mechanism includes a chemical cleaning tank and a liquid supply pump that pumps the chemical solution in the chemical cleaning tank into the treated water pipe.
[0052] The treated water pipe includes an outlet water manifold 16, a two-way water distribution pipe 17 connected to the outlet water manifold 16, and two water collection pipes 18 connected to the two-way water distribution pipe 17. The two ends of the outlet water pipe 22 are connected to the two water collection pipes 18 through elbow pipes 19. The two water collection pipes 18 and the two-way water distribution pipe 17 are fixed to the rack 1 by pipe clamps C20.
[0053] The two water collection pipes 18 and the two-way water distribution pipe 17 are fixed to the rack 1 by pipe clamps C20, ensuring the stability of the entire treated water pipe system and reducing shaking and vibration during operation. The design of the pipe clamps C20 allows the pipeline system to be quickly disassembled when maintenance or replacement is required, improving the maintainability of the system. Through the design of the two-way water distribution pipe 17 and the water collection pipe 18, uniform distribution of water flow in the membrane modules can be achieved.
[0054] The water outlet main pipe 16 is provided with a three-way valve 31, and the other two ports of the three-way valve 31 are connected with the clean water pipe 32 and the liquid supply pipe 33 respectively. The liquid supply pipe 33 is connected to the liquid supply pump. The three-way valve 31 allows the operator to switch the water flow direction as needed, realizing flexible distribution of water flow, such as switching in different operation modes such as normal filtration, cleaning and discharge. The three-way valve 31 enables the system to be connected with the clean water pipe 32 and the liquid supply pipe 33, expanding the functions of the system, for example, quickly switching to the liquid supply mode when chemical cleaning is needed. The liquid supply pipe 33 is connected to the liquid supply pump, which can provide cleaning liquid for the system when needed, improving the efficiency and effect of chemical cleaning. The design of the three-way valve 31 can reduce the additional valves and pipelines required by the system, saving materials and installation costs. The three-way valve 31 can usually be integrated with an automatic control system to realize remote control and automatic switching, improving the convenience of operation and the intelligent level of the system.
[0055] The membrane cleaning mechanism of the MBR membrane bioreactor combines physical and chemical cleaning methods, and its working principle is as follows:
[0056] Air-water cleaning mechanism: The air pump provides compressed air, which is distributed to the air distribution pipe 4 through the air inlet main pipe 3. The air distribution pipe 4 is connected to the inverted U-shaped air pipeline 5, which is inserted between adjacent membrane modules. The aeration discs 6 are evenly distributed on the inverted U-shaped air pipeline 5, and form bubbles when the compressed air is released through the aeration discs 6. The rising bubbles cause water to flow turbulently, and the impact of water flow and bubbles causes the membrane filaments 21 on the membrane module to vibrate and the membrane filaments 21 to rub against each other, thereby physically removing pollutants on the membrane surface.
[0057] Chemical cleaning mechanism: The chemical cleaning tank contains a specific cleaning solution. The liquid supply pump pumps the chemical solution in the chemical cleaning tank into the treated water pipe, and through backwashing, the chemical solution flows reversely through the hollow fiber membrane. The chemical solution penetrates through the membrane pores to the raw water side, chemically decomposing the organic matter attached to the membrane surface. This process helps to restore the filtration performance of the membrane and reduce the transmembrane pressure difference.
[0058] Through regular air-water cleaning and chemical cleaning, pollutants on the membrane surface can be effectively removed, keeping the membrane clean and maintaining high filtration efficiency and flux. Regular cleaning can reduce the wear and chemical corrosion of the membrane material, prolonging the service life of the membrane. The cleaned membrane module requires a lower transmembrane pressure difference, thus reducing the pumping energy consumption. The cleaning mechanism ensures the filtration performance of the membrane module, thereby improving the quality of the treated water. Efficient air-water cleaning can reduce the frequency of chemical cleaning, thereby reducing the use of chemical agents and operating costs. The cleaning mechanism can be integrated with a control system to realize automatic control, improving the convenience of operation and the stability of the system.
[0059] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A membrane cleaning mechanism of an MBR membrane bioreactor, characterized by, The utility model relates to a kind of hollow fiber membrane module and its cleaning device, including: Frame (1), several groups of hollow fiber membrane module (2) using PVDF as film material are installed on frame (1); Air-water cleaning mechanism, be provided inside hollow fiber membrane module (2), promote the circulation flow of fluid in reactor by air-water oscillation, cause membrane silk (21) on hollow fiber membrane module (2) to shake or mutual scrubbing between membrane silk (21), to clean hollow fiber membrane module (2), air-water cleaning mechanism includes air pump, intake manifold (3) being connected with air pump, air distribution pipe (4) being connected with intake manifold (3), several inverted U type air pipe (5) being inserted between adjacent two hollow fiber membrane module (2) and being connected with air distribution pipe (4) and air distribution plate (6) being uniformly distributed on inverted U type air pipe (5); Chemical cleaning mechanism, for the specified liquid medicine from treatment water pipe reverse flow to the hollow fiber membrane inside on hollow fiber membrane module (2), and by membrane micropore penetration to raw water side, decompose organic matter adhered on membrane surface, restore transmembrane pressure difference, chemical cleaning mechanism includes chemical washing tank and liquid supply pump of pump liquid medicine in chemical washing tank into treatment water pipe.
2. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 1, characterized in that: Hollow fiber membrane module (2) includes several membrane filaments (21) and fixed water pipe (22) and fixed pipe (23) on the upper and lower ends of membrane filament (21) and with membrane filament (21) is connected, the both ends of fixed pipe (23) are sealed and positioned on the side support plate (10) arranged on frame (1) by socket seal (8) and screw rod (9) cooperation.
3. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 2, characterized in that: Socket seal (8) includes plug-in ring (81) inserted into the port of fixed pipe (23), two sealing rings A (82) and a sealing ring B (83) are sleeved on the outer side of plug-in ring (81), locking block (85) with internal thread hole (84) is fixed on the inner side of plug-in ring (81) and protrudes from plug-in ring (81), and sealing ring B (83) is located in the port of plug-in ring (81) and on the outer side of locking block (85).
4. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 3, characterized in that: The side support plate (10) is fixed on the frame (1) by bolts, and a circular groove (101) is formed on the inner side of the side support plate (10) to abut against the locking block (85), and a hidden thread port (102) is formed on the side support plate (10) to connect with the circular groove (101) and the screw rod (9). The screw rod (9) is screwed into the internal thread hole (84) of the socket seal (8) after penetrating the hidden thread port (102), thereby locking and fixing the socket seal (8) on the side support plate (10), and the socket seal (8) is inserted into the port of the fixed pipe (23).
5. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 2, characterized in that: The upper and lower sides of the both ends of the water outlet pipe (22) are limited and supported by the upper limiting frame (11) and the lower supporting plate (12) fixed on the frame (1) by threads.
6. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 2, characterized in that: The both ends of the fixed pipe (23) are supported by the bracket (13) fixed on the frame (1) by threads.
7. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 1, characterized in that: One end of the inverted U-shaped air pipe (5) is connected with the air distribution pipe (4), and the other end is connected with the double-head sealing pipe (7), and the air distribution pipe (4) and the double-head sealing pipe (7) are fixed on the frame (1) by pipe clamps A (14).
8. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 1, characterized in that: The air intake manifold (3) is fixed to the frame (1) by a pipe clamp B (15).
9. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 2, characterized in that: The water treatment pipe comprises a water outlet manifold (16), a two-way water distribution pipe (17) connected to the water outlet manifold (16), and two water collecting pipes (18) connected to the two-way water distribution pipe (17), two ends of the water outlet pipe (22) are connected to the two water collecting pipes (18) through two bends (19), and the two water collecting pipes (18) and the two-way water distribution pipe (17) are fixed to the frame (1) by a pipe clamp C (20).
10. The membrane cleaning mechanism of an MBR (Membrane Bioreactor) according to claim 1, characterized in that: A three-way valve (31) is arranged on the water outlet manifold (16), the other two ports of the three-way valve (31) are respectively connected to a clean water pipe (32) and a liquid supply pipe (33), and the liquid supply pipe (33) is connected to a liquid supply pump.