A device and method for cleaning MBR membrane modules in situ online without disassembly

Abstract

The present application relates to the technical field of MBR membrane, particularly relates to a kind of air floatation self-driven type in-situ online disassembly-free cleaning device and method of MBR membrane module, including membrane box body, the membrane box body is provided with a plurality of MBR membranes, driving assembly is arranged between the two sides of the membrane box body inner chamber, the cleaning assembly, the cleaning assembly includes sliding rod, the sliding rod is fixedly connected between the two sides of membrane box body inner chamber, the sliding rod is provided with a plurality of, the present application is driven by the change of aeration airflow intensity directly driving cleaning tank lifting by the synergistic effect of suspension box and spring rope, without additional configuration motor, air cylinder or hydraulic cylinder and other power devices, suspension box generates upward buoyancy when aeration is enhanced, overcomes spring rope tension and pushes cleaning tank to rise;After aeration returns to normal, spring rope tension makes cleaning tank automatically reset, this design combines the original aeration system and cleaning mechanism into one, and equipment manufacturing cost and operating energy consumption are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of MBR membrane technology, and in particular to an apparatus and method for air-flotation self-driven online in-situ non-disassembly cleaning of MBR membrane modules. Background Technology

[0002] In membrane bioreactor (MBR) wastewater treatment systems, membrane fouling is the core issue restricting their efficient and stable operation. As the operating time increases, pollutants such as sludge flocs, colloidal particles, and microbial metabolites are gradually adsorbed and deposited on the membrane surface and inside the membrane pores, leading to increased transmembrane pressure difference and decreased permeate flow. In severe cases, the system needs to be shut down for cleaning. Currently, MBR membrane cleaning methods are mainly divided into two categories: offline cleaning and online cleaning, but both have obvious technical defects.

[0003] Offline cleaning requires lifting the membrane module from the membrane tank and transporting it to a dedicated cleaning area. Operators then manually rinse the membrane fibers using a high-pressure water gun, followed by chemical cleaning by sequentially immersing it in acid, alkali, and clear water tanks. Finally, it is lifted back into the membrane tank. This process not only requires production shutdowns and wastewater treatment interruptions, but also involves cumbersome lifting, transportation, and disassembly procedures, consuming significant manpower and time. High-pressure water gun rinsing can easily damage the membrane fibers, and improper use of chemicals can cause secondary pollution. Furthermore, manual operation makes it difficult to ensure consistent cleaning, resulting in limited membrane flux recovery. As the membrane fibers age, the frequency of offline cleaning increases, leading to a sharp rise in maintenance costs. Online cleaning, on the other hand, eliminates the need to lift the membrane module from the membrane tank. The process includes online aeration cleaning and online water backwashing. Online aeration cleaning uses an air compressor to aerate the bottom of the membrane tank, utilizing the shear force generated by the gas-liquid two-phase flow to flush the membrane surface. Online water backwashing uses reverse water flow to rinse the inside of the membrane pores. However, existing online cleaning technologies have two major drawbacks: First, they are extremely energy-intensive, with aeration energy consumption typically accounting for more than 70% of the total energy consumption of an MBR system. To maintain the cleaning effect, long-term high-intensity aeration is often required, resulting in high operating costs. Second, the cleaning is not thorough. Relying solely on airflow flushing and water backwashing is insufficient to effectively remove stubborn fouling such as colloids and microorganisms adhering to the membrane pores and membrane fiber surface. As the operating time increases, the membrane flux will gradually decrease, ultimately requiring offline cleaning. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an apparatus and method for air-flotation self-driven online in-situ non-disassembly cleaning of MBR membrane modules.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a device for air-flotation self-driven online in-situ non-disassembly cleaning of MBR membrane modules, comprising a membrane tank body, on which a plurality of MBR membranes are disposed, a driving component is disposed between the two sides of the inner cavity of the membrane tank body, and a cleaning component, the cleaning component comprising sliding rods fixedly connected between the two sides of the inner cavity of the membrane tank body, a plurality of sliding rods being disposed, a cleaning box being sleeved on the surface of the sliding rods, sliding holes being provided on both sides of the cleaning box, a linkage rod being fixedly connected to one side of the cleaning box, and spring ropes being fixedly connected to both sides of the linkage rods, the end of the spring ropes away from the linkage rod being fixedly connected to the top of the inner cavity of the membrane tank body, and a cleaning component being disposed on the surface of the cleaning box.

[0006] As a preferred embodiment of the present invention, the cleaning assembly includes a high-pressure nozzle and an air compressor. The air compressor is located at the top of the membrane chamber body, and the high-pressure nozzle is located at the bottom of the cleaning chamber and on the side near the MBR membrane. A suspension trough is provided at the top of the cleaning chamber, and a suspension box is fixedly connected inside the suspension trough. An air inlet is provided on one side of the cleaning chamber, and a rubber hose is fixedly connected to one side of the air compressor. The rubber hose is fixedly connected to the air inlet. A rubber brush is fixedly connected to the side of the cleaning chamber near the MBR membrane.

[0007] As a preferred embodiment of the present invention, a fixing component is provided on one side of the inner cavity of the membrane box body. The fixing component includes a threaded opening and a first sliding groove. The threaded opening is opened on the side of the membrane box body surface close to the MBR membrane. A threaded rod is threadedly connected inside the threaded opening. A rotating block is fixedly connected on the side of the threaded rod away from the membrane box body. The rotating block is used to rotate the threaded rod and can limit the threaded rod to prevent it from falling off.

[0008] As a preferred embodiment of the present invention, a pressing plate is rotatably connected to one end of the threaded rod that extends into the interior of the membrane box body.

[0009] As a preferred embodiment of the present invention, a collection assembly is provided at the bottom of the membrane box body, the first slide groove is opened on both sides of the membrane box body, and a first slider is slidably connected inside the first slide groove. Both first sliders are fixedly connected to a pressing plate on the adjacent side.

[0010] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention utilizes the synergistic effect of the suspension box and the spring rope to directly drive the lifting and lowering of the cleaning tank by changing the intensity of the aeration airflow. It eliminates the need for additional power devices such as motors, cylinders, or hydraulic cylinders. When aeration is enhanced, the suspension box generates upward buoyancy, which overcomes the tension of the spring rope and pushes the cleaning tank upward. After aeration returns to normal, the tension of the spring rope causes the cleaning tank to automatically reset. This design integrates the original aeration system and cleaning mechanism into one, significantly reducing equipment manufacturing costs and operating energy consumption.

[0011] 2. This invention simultaneously equips the cleaning tank with high-pressure nozzles and rubber brushes, achieving a combined effect of airflow rinsing and physical scrubbing. During the rising phase, the high-pressure nozzles spray strong airflow to directly peel off the deposits on the membrane surface, while the rubber brushes simultaneously apply lateral scrubbing pressure to the membrane fibers. During the descending phase, low-pressure auxiliary airflow works in conjunction with the rubber brushes again to complete bidirectional scraping. This dual mechanism of air rinsing and brushing can effectively remove stubborn fouling such as colloids and microorganisms from inside the membrane pores and on the surface of the membrane fibers, resulting in a membrane flux recovery rate that is significantly higher than that of traditional single aeration cleaning.

[0012] 3. The cleaning box of the present invention is slidably connected to the inside of the membrane tank through a sliding rod and a sliding hole, which can directly carry out cleaning operations in the normal installation state of the MBR membrane module without lifting the membrane module out of the membrane tank. This avoids production losses, risks of manual high-altitude operations and mechanical damage to the membrane fibers during offline cleaning. At the same time, the device supports continuous or intermittent cleaning modes and can flexibly adjust the cleaning frequency and intensity according to the degree of membrane fouling, so as to realize automated and intelligent operation and maintenance.

[0013] 4. Through the cooperation of the threaded rod, the pressing plate and the first slider in the fixed component, the operator can easily adjust the distance between the cleaning tank and the MBR membrane. Rotating the threaded rod drives the pressing plate to slide along the first slide groove, thereby changing the contact pressure between the rubber brush and the membrane surface to adapt to different membrane fiber thicknesses, installation errors or membrane fiber slack. This design ensures the consistency of the cleaning effect and extends the service life of the rubber brush and membrane fiber. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the membrane box body of the present invention; Figure 2 This is a schematic diagram of the cleaning tank of the present invention; Figure 3 This is a schematic diagram of the suspension tank of the present invention; Figure 4 This is a schematic diagram of the structure of the rubber hose of the present invention; Figure 5 This is a schematic diagram of the structure of the spring rope of the present invention; Figure 6 This is a schematic diagram of the pressing plate of the present invention; Figure 7 This is a schematic diagram of the structure of the first slide groove of the present invention.

[0015] The components include: 1. Membrane box body; 2. MBR membrane; 10. Sliding rod; 11. Cleaning tank; 12. Sliding hole; 13. Linkage rod; 14. Spring rope; 20. High-pressure nozzle; 21. Air compressor; 22. Suspension tank; 30. Suspension box; 31. Air inlet; 32. Rubber hose; 33. Rubber brush; 40. Threaded opening; 41. Threaded rod; 42. Rotating block; 43. First slide groove; 44. Pressing plate; 45. First slider. Detailed Implementation

[0016] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0017] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a device for air-flotation self-driven online in-situ non-disassembly cleaning of MBR membrane modules includes a membrane tank body 1, on which a plurality of MBR membranes 2 are disposed. A drive assembly is disposed between the two sides of the inner cavity of the membrane tank body 1. A cleaning assembly includes sliding rods 10, which are fixedly connected between the two sides of the inner cavity of the membrane tank body 1. A plurality of sliding rods 10 are provided. A cleaning box 11 is sleeved on the surface of the sliding rod 10. Sliding holes 12 are opened on both sides of the cleaning box 11. A linkage rod 13 is fixedly connected to one side of the cleaning box 11. Spring ropes 14 are fixedly connected to both sides of the linkage rod 13. The spring ropes 14 are away from the linkage rod 13. One end is fixedly connected to the top of the inner cavity of the membrane box body 1. A cleaning assembly is provided on the surface of the cleaning box 11. The cleaning assembly includes a high-pressure nozzle 20 and an air compressor 21. The air compressor 21 is located at the top of the membrane box body 1. The high-pressure nozzle 20 is located at the bottom of the cleaning box 11 and on the side near the MBR membrane 2. A suspension trough 22 is opened at the top of the cleaning box 11. A suspension box 30 is fixedly connected inside the suspension trough 22. An air inlet 31 is provided on one side of the cleaning box 11. A rubber hose 32 is fixedly connected to one side of the air compressor 21. The rubber hose 32 is fixedly connected to the air inlet 31. A rubber brush 33 is fixedly connected to the side of the cleaning box 11 near the MBR membrane 2.

[0018] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the membrane tank body 1 is filled with wastewater to be treated, and the MBR membrane 2 is submerged in water, performing normal water production operations. The cleaning tank 11 is connected to multiple sliding rods 10 through sliding holes 12. Under the continuous tension of the spring rope 14, it is stably stationary at the bottom of the sliding rod 10 near the bottom of the membrane tank. The air compressor 21 is in basic aeration operation, supplying a small amount of gas to the suspension box 30 through the rubber hose 32 and air inlet 31. However, the buoyancy generated at this time is insufficient to overcome the tension of the spring rope 14, so the cleaning tank 11 remains stationary, and the high-pressure nozzle 20 is not turned on or Maintaining only a small airflow, the system triggers and drives the upward movement. The control system monitors the transmembrane pressure difference, sludge concentration, or permeate flow rate in real time. When any parameter exceeds a preset threshold, the cleaning program is automatically triggered. The power of the air compressor 21 increases, and the aeration intensity increases instantaneously. A large amount of gas rapidly enters the suspension box 30 through the rubber hose 32 and air inlet 31. The internal pressure of the suspension box 30 increases, generating a strong upward buoyancy. This buoyancy overcomes the tension of the spring rope 14, propelling the cleaning box 11 to slide smoothly upward along the sliding rod 10 for cleaning. During the upward movement of the cleaning box 11, the components installed on... High-pressure nozzles 20 at the bottom of the cleaning tank 11 and on the side near the MBR membrane 2 simultaneously spray high-pressure airflow. The front and rear rows of high-pressure nozzles are angled at 30° to the surface of the MBR membrane 2, generating high-speed impact airflow to peel off sludge, colloids, and microorganisms adhering to the membrane surface. The downward-facing high-pressure nozzles below spray airflow to assist in pushing the cleaning tank 11 upward, reducing the resistance of the spring rope 14. Simultaneously, rubber brushes 33 fixed to the side of the cleaning tank 11 are in close contact with the surface of the MBR membrane 2, generating relative friction during the upward movement to physically scrub the membrane fibers. Depending on the degree of contamination, multiple cycles or a continuous lifting mode can be performed for cyclic cleaning. In the continuous cleaning mode, the power of the air compressor 21 changes periodically between "high-medium-high-medium", causing the cleaning box 11 to move up and down repeatedly along the sliding rod 10 under the alternating action of the tension of the spring rope 14 and the buoyancy of suspension. Each time it is lifted, the rubber brush 33 and the high-pressure nozzle 20 perform a complete "upper scraping and lower brushing" double-effect cleaning on the membrane surface. The control system can automatically adjust the number of cleaning cycles according to the real-time monitored changes in transmembrane pressure difference until the membrane flux is restored to the set value.

[0019] refer to Figure 1 , Figure 6 and Figure 7As shown, a fixing component is provided on one side of the inner cavity of the membrane box body 1. The fixing component includes a threaded opening 40 and a first sliding groove 43. The threaded opening 40 is opened on the surface of the membrane box body 1 near the MBR membrane 2. A threaded rod 41 is threadedly connected inside the threaded opening 40. A rotating block 42 is fixedly connected to the side of the threaded rod 41 away from the membrane box body 1. The rotating block 42 is used to rotate the threaded rod 41 and can limit the threaded rod 41 to prevent it from falling off. A pressing plate 44 is rotatably connected to one end of the threaded rod 41 that extends into the membrane box body 1. The first sliding groove 43 is opened on both sides of the membrane box body 1. A first slider 45 is slidably connected inside the first sliding groove 43. Both first sliders 45 are fixedly connected to the pressing plate 44 on the adjacent side.

[0020] refer to Figure 1 , Figure 6 and Figure 7 As shown, the pressing plate 44 in the fixing assembly has been adjusted to a suitable position according to the membrane fiber thickness via the threaded rod 41. The first slider 45 slides along the first groove 43 to guide the rubber brush 33 to maintain slight contact with the surface of the MBR membrane 2. The pressing plate 44 in the fixing assembly is stably guided by the first slider 45 along the first groove 43, ensuring that the contact pressure between the rubber brush 33 and the membrane surface is uniform and not biased. The operator can rotate the threaded rod 41 in advance via the rotating block 42 to fine-tune the distance between the pressing plate 44 and the MBR membrane 2 to adapt to different membrane fiber thicknesses or installation errors. The length of the threaded rod 41 screwed into the threaded opening 40 determines the extension amount of the pressing plate 44, thereby accurately controlling the brushing force. The sliding of the first slider 45 in the first groove 43 is smooth and stable, avoiding jamming or displacement of the pressing plate 44 during the cleaning process. The cleaning tank 11 rises to the highest point of the sliding rod 10. After the end, the control system restores the power of the air compressor 21 to the initial basic aeration state, the amount of gas entering the suspension box 30 decreases, and the buoyancy weakens rapidly. At this time, the tension of the spring rope 14 takes the lead, pulling the cleaning box 11 to slide down and reset quickly along the sliding rod 10. During the descent, the high-pressure nozzle 20 maintains a low-pressure auxiliary airflow to perform a secondary purging of the membrane surface; the rubber brush 33 rubs against the surface of the MBR membrane 2 again to complete the reverse brushing. At this time, the pressing plate 44 in the fixed component still maintains a stable contact pressure through the first sliding groove 43 and the first slider 45. The threaded rod 41 will not loosen unexpectedly under the limit of the rotating block 42. The diameter of the rotating block 42 is larger than the threaded opening 40, which plays a role in preventing it from falling off, ensuring that the descent brushing effect is consistent with the rising stage. A complete rising-falling cycle completes one cleaning. Depending on the degree of pollution, multiple cycles can be performed or a continuous lifting mode can be adopted.

[0021] Working principle: Before use: Refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the membrane tank body 1 is filled with wastewater to be treated, and the MBR membrane 2 is submerged in water, performing normal water production operations. The cleaning tank 11 is connected to multiple sliding rods 10 through sliding holes 12. Under the continuous tension of the spring rope 14, it is stably stopped at the bottom of the sliding rod 10 near the bottom of the membrane tank. The air compressor 21 is in the basic aeration working state, and a small amount of gas is delivered to the suspension box 30 through the rubber hose 32 and the air outlet 31. However, the buoyancy generated at this time is not enough to overcome the tension of the spring rope 14, so the cleaning tank 11 remains stationary. The high-pressure nozzle 20 is not turned on or only maintains a small amount of airflow. The pressing plate 44 in the fixing assembly has been adjusted to a suitable position according to the membrane fiber thickness through the threaded rod 41. The first slider 45 slides along the first sliding groove 43 to guide the rubber brush 33 to maintain slight contact with the surface of the MBR membrane 2. The collection slot 51 on the collection plate 50 is in an empty state.

[0022] When using: Refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the system triggers and drives the upward movement. The control system monitors the transmembrane pressure difference, sludge concentration, or permeate flow rate in real time. When any parameter exceeds a preset threshold, the cleaning program is automatically triggered. The power of the air compressor 21 is increased, and the aeration intensity increases instantaneously. A large amount of gas quickly enters the suspension box 30 through the rubber hose 32 and the air outlet 31. The internal pressure of the suspension box 30 increases, generating a strong upward buoyancy. This buoyancy overcomes the tension of the spring rope 14, pushing the cleaning box 11 to slide smoothly upward along the sliding rod 10 for cleaning. During the upward movement of the cleaning box 11, the high-pressure nozzles 20 installed at the bottom of the cleaning box 11 and on the side near the MBR membrane 2 simultaneously spray high-pressure airflow. The front and rear rows of high-pressure nozzles are tilted at a 30° angle to the surface of the MBR membrane 2, generating a high-speed impact airflow to peel off the sludge, colloids, and microorganisms attached to the membrane surface. The high-pressure nozzles below spray airflow vertically downward to assist in pushing the cleaning box 11 upward and reduce the resistance of the spring rope 14. At the same time, the rubber brush 33 fixed to the side of the cleaning box 11 is in close contact with the surface of the MBR membrane 2, generating relative friction during the upward movement. The membrane fibers are physically brushed. During this process, the pressing plate 44 in the fixed assembly is stably guided along the first slide groove 43 by the first slider 45, ensuring that the contact pressure between the rubber brush 33 and the membrane surface is uniform and not biased. The operator can rotate the threaded rod 41 in advance by rotating the rotating block 42 to fine-tune the distance between the pressing plate 44 and the MBR membrane 2 to adapt to different membrane fiber thicknesses or installation errors. The length of the threaded rod 41 screwed into the threaded opening 40 determines the extension amount of the pressing plate 44, thereby precisely controlling the brushing force. The first slider 45 is in the first... The sliding within the chute 43 is smooth and stable, preventing the pressing plate 44 from getting stuck or shifting during the cleaning process. When the cleaning box 11 rises to the highest point of the sliding rod 10, the control system returns the power of the air compressor 21 to the initial basic aeration state. The amount of gas entering the suspension box 30 decreases, and the buoyancy weakens rapidly. At this time, the tension of the spring rope 14 takes the lead, pulling the cleaning box 11 to slide down and reset quickly along the sliding rod 10. During the descent, the high-pressure nozzle 20 maintains a low-pressure auxiliary airflow to perform secondary sweeping on the membrane surface.Rubber brush 33 rubs against the surface of MBR membrane 2 again, completing the reverse brushing. At this time, the pressing plate 44 in the fixing assembly still maintains stable contact pressure through the first sliding groove 43 and the first slider 45. The threaded rod 41 will not loosen unexpectedly under the limit of the rotating block 42. The diameter of the rotating block 42 is larger than the thread opening 40, which plays a role in preventing it from falling off, ensuring that the brushing effect of the descent is consistent with the rising stage. One complete rising-falling cycle completes one cleaning cycle. Depending on the degree of contamination, multiple cycles can be performed or a continuous lifting mode can be used for cyclic cleaning. In the continuous cleaning mode, the power of the air compressor 21 changes periodically between high-medium-high-medium, causing the cleaning box 11 to move up and down repeatedly along the sliding rod 10 under the alternating action of the tension of the spring rope 14 and the buoyancy of suspension. After each rise and fall, the rubber brush 33 and the high-pressure nozzle 20 perform a complete upper scraping and lower brushing double-effect cleaning of the membrane surface. The control system can automatically adjust the number of cleaning cycles according to the real-time monitored changes in transmembrane pressure difference until the membrane flux recovers to the set value.

[0023] After use: Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, after cleaning, the air compressor 21 returns to the basic aeration intensity, and the buoyancy inside the suspension box 30 decreases to an insufficient level to overcome the tension of the spring rope 14. Under the action of the spring rope 14, the cleaning box 11 remains stably at the bottom of the sliding rod 10, waiting for the next trigger. The sludge, colloids, and other impurities that have detached from the surface of the MBR membrane 2 settle downwards under the action of gravity and fall into the collection tank 51 of the collection plate 50 for centralized collection, preventing impurities from re-suspending and contaminating the membrane module. Operators can open the collection tank periodically. 51. Clean impurities. If it is necessary to replace the rubber brush 33 or repair the cleaning box 11, the threaded rod 41 can be loosened by rotating the block 42, so that the pressing plate 44 moves backward and the first slider 45 slides outward along the first slide groove 43 to release the limit on the MBR membrane 2. The cleaning box 11 can then be removed from the sliding rod 10. After maintenance, the cleaning box 11 is reinstalled, and the pressing plate 44 is adjusted to a suitable position by rotating the threaded rod 41 by rotating the block 42. Finally, the threaded rod 41 is locked, and the device can return to standby mode.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A device for self-driven online in-situ non-disassembly cleaning of MBR membrane modules using air flotation, comprising a membrane tank body (1), characterized in that, The membrane box body (1) is provided with a plurality of MBR membranes (2). A drive assembly is provided between the two sides of the inner cavity of the membrane box body (1). The cleaning assembly includes a sliding rod (10). The sliding rod (10) is fixedly connected between the two sides of the inner cavity of the membrane box body (1). A plurality of sliding rods (10) are provided. A cleaning box (11) is sleeved on the surface of the sliding rod (10). Sliding holes (12) are provided on both sides of the cleaning box (11). A linkage rod (13) is fixedly connected to one side of the cleaning box (11). Spring ropes (14) are fixedly connected to both sides of the linkage rod (13). The end of the spring rope (14) away from the linkage rod (13) is fixedly connected to the top of the inner cavity of the membrane box body (1). The cleaning assembly is provided on the surface of the cleaning box (11).

2. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 1, characterized in that, The cleaning assembly includes a high-pressure nozzle (20) and a pneumatic compressor (21). The pneumatic compressor (21) is located on the top of the membrane box body (1). The high-pressure nozzle (20) is located at the bottom of the cleaning box (11) and on the side near the MBR membrane (2). A suspension trough (22) is provided on the top of the cleaning box (11).

3. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 2, characterized in that, The suspension tank (22) is fixedly connected to a suspension box (30), the cleaning tank (11) is provided with an air inlet (31) on one side, the air compressor (21) is fixedly connected to a rubber hose (32) on one side, the rubber hose (32) is fixedly connected to the air inlet (31), and the cleaning tank (11) is fixedly connected to a rubber brush (33) on the side near the MBR membrane (2).

4. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 1, characterized in that, A fixing component is provided on one side of the inner cavity of the membrane box body (1). The fixing component includes a threaded opening (40) and a first sliding groove (43). The threaded opening (40) is opened on the side of the surface of the membrane box body (1) near the MBR membrane (2). A threaded rod (41) is connected to the threaded opening (40) internally.

5. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 4, characterized in that, A rotating block (42) is fixedly connected to the side of the threaded rod (41) away from the membrane box body (1). The rotating block (42) is used to rotate the threaded rod (41) and can limit the threaded rod (41) to prevent it from falling off.

6. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 4, characterized in that, The threaded rod (41) extends into the membrane box body (1) and is rotatably connected to a pressing plate (44). The first groove (43) is opened on both sides of the membrane box body (1).

7. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 6, characterized in that, The first slide groove (43) has a first slider (45) slidably connected inside.

8. The apparatus for self-driven online in-situ non-disassembly cleaning of MBR membrane modules by air flotation according to claim 1, characterized in that, Both of the first sliders (45) are fixedly connected to the pressing plate (44) on the adjacent side.

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