MBR flat membrane module for sewage treatment

Abstract

The present application relates to sewage treatment technical field, specifically disclose a kind of MBR flat membrane module for sewage treatment, including frame body, multiple processing mechanisms being arranged in frame body and water production pipe being installed on frame body, multiple sealing mechanisms are equipped on water production pipe, the drainage mechanism is connected on the sealing mechanism, the drainage mechanism is connected with processing mechanism;The MBR flat membrane module for sewage treatment of the present application, when one of processing mechanisms is damaged, the negative pressure in the corresponding fixed pipe thereof will immediately decrease, at this time, sealing assembly resets and seals sealing seat, when resetting, sealing assembly can push the blocking assembly to move to open the drain pipe, when the drain pipe is opened, the water production entering subsequent processing mechanism can backflow into sewage treatment tank through drain pipe, avoid to cause pollution to the treated water production.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to an MBR flat sheet membrane module for wastewater treatment. Background Technology

[0002] Wastewater treatment is a technological system that purifies water bodies using physical, chemical, and biological methods to meet discharge or reuse standards. It is mainly divided into two categories: industrial wastewater treatment and domestic wastewater treatment. The treatment process includes three stages: primary treatment removes suspended solids using physical methods such as screens and sedimentation; secondary treatment uses biological technologies such as activated sludge and biofilm processes to degrade organic matter; and tertiary treatment uses technologies such as membrane separation and ion exchange for deep purification. The industry is gradually promoting high-efficiency processes such as membrane bioreactors (MBRs) and electron beam treatment. Among them, the MBR is a new type of wastewater treatment system that organically combines membrane separation technology and biological treatment technology. When the MBR membrane is working, a vacuum pump evacuates the permeate side of the membrane module, gradually reducing the pressure and creating a negative pressure environment (vacuum environment). At this time, the influent side of the membrane module (connected to the biological reactor containing the wastewater to be treated) is still at a relatively high pressure (usually atmospheric pressure), thus establishing a significant pressure difference across the membrane. Under this pressure difference, water molecules in the mixed liquor (containing water, microorganisms, organic matter, suspended solids, etc.) in the bioreactor overcome membrane resistance and pass through the membrane pores to reach the permeate side, becoming the permeate (i.e., the treated effluent). Meanwhile, large molecules such as microorganisms, suspended solids, and colloids in the mixed liquor are retained by the membrane and remain in the bioreactor, ensuring the quality of the effluent.

[0003] The patent document with authorization announcement number CN223561397U discloses an MBR membrane bioreactor, which includes an outer shell and multiple membrane modules disposed inside the outer shell. Multiple movable rods are slidably connected to the outer top surface of the outer shell, and the multiple movable rods are arranged alternately with the multiple membrane modules. Part of the movable rods is located inside the outer shell, and the other part of the movable rods is located outside the outer shell.

[0004] However, the structural design of the aforementioned technologies, while capable of cleaning impurities from the MBR membrane surface, carries the risk of scratching the membrane during the cleaning process. Furthermore, when the aeration holes in the aeration pipe become clogged, uneven aeration can occur, leading to high-speed airflow directly impacting the membrane and further exacerbating damage. When the MBR membrane is damaged, it is difficult to shut it off promptly, potentially allowing untreated wastewater to enter the permeate side and be discharged through the pipeline, thus polluting the treated wastewater and affecting the overall wastewater treatment efficiency.

[0005] Therefore, an MBR flat sheet membrane module for wastewater treatment is proposed to address the problems mentioned above. Summary of the Invention

[0006] This invention provides an MBR flat sheet membrane module for wastewater treatment, aiming to solve the problem in related technologies where it is inconvenient to shut down damaged MBR membranes in a timely manner, which can easily pollute the treated wastewater.

[0007] The wastewater treatment MBR flat sheet membrane module of the present invention includes a frame, a plurality of treatment mechanisms disposed in the frame, and a permeate pipe installed on the frame. The permeate pipe is provided with a plurality of sealing mechanisms, and a drainage mechanism is connected to the sealing mechanism. The drainage mechanism is connected to the treatment mechanism.

[0008] The sealing mechanism includes a fixed pipe installed on the water production pipe, an adjusting component installed on the inner wall of the fixed pipe, a reset component elastically connected to the adjusting component, a sealing component disposed on the reset component, and a sealing seat disposed on the outside of the sealing component. The fixed pipe has a large-diameter section and a small-diameter section. The adjusting component is installed in the large-diameter section of the fixed pipe, and the sealing seat is installed in the small-diameter section of the fixed pipe. The sealing component can seal the fixed pipe by inserting into the sealing seat.

[0009] The drainage mechanism includes a drain pipe installed on a fixed pipe, a limiting component rotatably connected to the inner wall of the drain pipe, a sealing component slidably connected in the drain pipe, and a locking component set on the sealing component. The drain pipe is connected to the treatment mechanism. The end of the sealing component slides in the sealing component. When the sealing component is disengaged from the sealing seat, it can drive the sealing component to seal the drain pipe.

[0010] When treating wastewater, a negative pressure pump is activated to create negative pressure inside the fixed pipe. This negative pressure then drives the sealing assembly to move from the smaller diameter section of the fixed pipe to the larger diameter section. When the sealing assembly enters the larger diameter section, the sealing block releases its seal on the sealing seat, allowing permeable water to enter the fixed pipe through the drain pipe and exit through the permeable water pipe. If one of the treatment components malfunctions, the negative pressure in the corresponding fixed pipe will immediately decrease. At this point, the sealing assembly resets and seals the sealing seat. During reset, the sealing assembly pushes the sealing component to open the drain pipe. When the drain pipe is open, permeable water entering the treatment components can flow back into the wastewater treatment tank through the drain pipe, preventing contamination of the treated permeable water.

[0011] Preferably, the adjustment assembly includes a fixed frame, a slide rod, and a movable plate. The fixed frame is installed in the large-diameter section of the fixed pipe, the slide rod is slidably connected in the fixed frame, the movable plate is installed at one end of the slide rod, and the other end of the slide rod is connected to the reset assembly.

[0012] Preferably, the reset assembly includes a connecting plate, one end of which is mounted on a slide rod, and the other end of which is elastically connected to a sealing assembly.

[0013] Preferably, the sealing assembly includes a sealing plate, a sealing block, a connecting rod, and a push block. The sealing plate is elastically connected to the connecting plate and slidably connected to the small-diameter section of the fixed pipe. The sealing block is mounted on the sealing plate and is tapered in shape and adapted to the sealing seat. One end of the connecting rod is mounted on the sealing block, and the push block is mounted on the other end of the connecting rod and slidably connected in the sealing assembly.

[0014] Preferably, a water-proof cover one is installed between the fixed frame and the movable plate, and a water-proof cover two is installed between the connecting plate and the sealing plate.

[0015] Preferably, the drain pipe is a tee pipe, with one end of the vertical section of the drain pipe facing downwards and connected to the sewage treatment tank, and the sealing component can enter the vertical section of the drain pipe.

[0016] When the sealing component is removed from the vertical section of the drain pipe, the produced water that subsequently enters the treatment mechanism can flow back into the sewage treatment tank through the drain pipe.

[0017] Preferably, the limiting component includes a rotating rod rotatably connected to the drain pipe, the sealing component is slidably disposed on the rotating rod, the outer side of the rotating rod is provided with an arc-shaped groove and a sliding groove, the tail end of the arc-shaped groove and the tail end of the sliding groove are connected, the depth of the sliding groove is greater than the depth of the arc-shaped groove, and the inner bottom wall of the first end of the sliding groove is provided with a limiting hole adapted to the locking component.

[0018] Preferably, the sealing assembly includes a sliding plate, a first wedge, a second wedge, and a sealing plate. The sliding plate has a slot on one side that is compatible with the push block, and a hole at one end of the sliding plate for the rotating rod to slide. The first and second wedges are installed diagonally on both sides of the sliding plate, and the sealing plate is installed on the sliding plate and can seal with the vertical section of the drain pipe.

[0019] During the process of the sealing block moving out of the sealing seat, the push block can drive the sealing plate on the slide plate into the vertical section of the drain pipe through the second wedge to close the drain pipe. When the negative pressure decreases, the sealing block enters the sealing seat again, and the push block can drive the sealing plate on the slide plate out of the vertical section of the drain pipe through the first wedge to open the drain pipe.

[0020] Preferably, the locking assembly includes a movable rod and a plug rod. The movable rod is threaded onto the slide plate, and a mounting groove is provided at the bottom end of the movable rod. One end of the plug rod is elastically connected to the mounting groove, and the other end of the plug rod passes through the movable rod and extends to the outside of the movable rod.

[0021] When the sealing block re-enters the sealing seat, the insertion rod aligns with the limiting hole in the slide groove, allowing the insertion rod to enter the limiting hole and lock the sealing plate, preventing the corresponding fixing tube from reopening after the processing mechanism is damaged.

[0022] Preferably, an adjusting rod is rotatably connected between the plurality of fixed tubes, and a plurality of adjusting components are installed on the adjusting rod. The plurality of adjusting components are respectively located in the fixed tubes and abut against the movable plate.

[0023] By rotating the adjusting rod, the adjusting component can be rotated to adjust the reset resistance of the sealing block, thereby adapting to different negative pressure intensities.

[0024] The beneficial effects of the present invention, achieved by adopting the above technical solution, are as follows: When treating wastewater, the sealing component is moved from the small diameter section to the large diameter section of the fixed pipe by negative pressure. When the sealing component enters the large diameter section of the fixed pipe, the sealing block releases the seal on the sealing seat, allowing the produced water to enter the fixed pipe through the drain pipe and be discharged through the produced water pipe. When one of the treatment mechanisms is damaged, the negative pressure in the corresponding fixed pipe will immediately decrease. At this time, the sealing component resets and seals the sealing seat. When the sealing component resets, it can push the sealing component to move to open the drain pipe. When the drain pipe is opened, the produced water that subsequently enters the treatment mechanism can flow back into the wastewater treatment tank through the drain pipe, avoiding pollution of the treated produced water. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the support mechanism in a specific embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the fixed tube in a specific embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the processing mechanism in a specific embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the fixed tube in a specific embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the sealing assembly in a specific embodiment of the present invention.

[0031] Figure 7 This is a schematic diagram of the connecting plate in a specific embodiment of the present invention.

[0032] Figure 8This is a schematic diagram of the sealing component in a specific embodiment of the present invention.

[0033] Figure 9 This is a schematic diagram of the limiting component in a specific embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of the locking component in a specific embodiment of the present invention.

[0035] Figure label:

[0036] 10. Supporting mechanism; 11. Frame; 12. Aeration pipe; 13. Support plate;

[0037] 20. Treatment unit; 21. Fixing frame; 22. MBR membrane; 23. Product water outlet;

[0038] 30. Water production pipe;

[0039] 40. Sealing mechanism; 41. Fixed pipe; 42. Adjusting assembly; 421. Fixed frame; 422. Slide rod; 423. Movable plate; 424. Spring 1; 425. Waterproof cover 1; 43. Reset assembly; 431. Connecting plate; 432. Spring 2; 433. Waterproof cover 2; 44. Sealing assembly; 441. Sealing plate; 442. Fixed rod; 443. Sealing block; 444. Connecting rod; 445. Push block; 45. Sealing seat;

[0040] 50. Drainage mechanism; 51. Drainage pipe; 52. Connecting pipe; 53. Limiting component; 531. Rotating rod; 532. Arc groove; 533. Slide groove; 534. Limiting hole; 54. Sealing component; 541. Slide plate; 542. Slot; 543. Insertion hole; 544. Wedge one; 545. Wedge two; 546. Sealing plate; 55. Locking component; 551. Movable rod; 552. Mounting groove; 553. Spring three; 554. Insert rod;

[0041] 60. Adjustment mechanism; 61. Adjustment rod; 62. Adjustment component. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] like Figures 1 to 10As shown, the MBR flat-sheet membrane module for wastewater treatment of the present invention includes a support structure 10, a treatment mechanism 20, a permeate pipe 30, a sealing mechanism 40, and a drainage mechanism 50. The support structure 10 is disposed in a wastewater treatment tank. Multiple treatment mechanisms 20 are disposed inside the support structure 10, and the permeate pipe 30 is disposed on one side of the top of the support structure 10. Multiple sealing mechanisms 40 and multiple drainage mechanisms 50 are also disposed. One end of each sealing mechanism 40 is sequentially disposed on the permeate pipe 30, and the other end of each sealing mechanism 40 is connected to one end of each drainage mechanism 50. The other ends of each drainage mechanism 50 are connected to the multiple treatment mechanisms 20. An adjusting mechanism 60 is also connected between the multiple sealing mechanisms 40 to adapt the sealing mechanisms 40 to different pumping pressures.

[0044] During wastewater treatment, the outlet of the product water pipe 30 is connected to a negative pressure pump. The negative pressure in the product water pipe 30 then opens the sealing mechanism 40. When the sealing mechanism 40 is open, the drainage mechanism 50 is closed. At this time, the wastewater in the wastewater treatment tank, after being filtered by the treatment mechanism 20, passes sequentially through the drainage mechanism 50, the sealing mechanism 40, and the product water pipe 30 before being discharged. If one of the treatment mechanisms 20 is damaged, the negative pressure in the corresponding sealing mechanism 40 will immediately decrease, causing the sealing mechanism 40 to close, preventing untreated wastewater from entering the product water pipe 30. Simultaneously, the drainage mechanism 50 opens to discharge untreated wastewater back into the wastewater treatment tank.

[0045] like Figures 1 to 2 As shown, the support mechanism 10 includes a frame 11, an aeration pipe 12, and a support plate 13. The frame 11 is installed in the sewage treatment tank, and multiple treatment devices 20 are sequentially inserted into the inner side of the frame 11. The aeration pipe 12 is installed at the bottom of the frame 11. There are two support plates 13, both of which are installed on the top of one side of the frame 11, and the product water pipe 30 is installed on the top of the two support plates 13.

[0046] like Figures 1 to 4 As shown, the treatment mechanism 20 includes a fixing frame 21, an MBR membrane 22, and a product outlet 23. The fixing frame 21 is inserted into the inner side of the frame 11, and the MBR membrane 22 is installed inside the fixing frame 21. The product outlet 23 is installed on the top side of the fixing frame 21 and is connected to the MBR membrane 22. The top of the product outlet 23 is connected to the drainage mechanism 50.

[0047] Under negative pressure, the sewage in the sewage treatment tank passes through the MBR membrane 22 and enters the interior of the MBR membrane 22 to form permeate water. At this time, the permeate water enters the drainage mechanism 50 through the permeate water outlet 23 and enters the permeate water pipe 30 through the sealing mechanism 40.

[0048] like Figure 1 and Figure 5As shown, the sealing mechanism 40 includes a fixed pipe 41, an adjusting assembly 42, a resetting assembly 43, a sealing assembly 44, and a sealing seat 45. The fixed pipe 41 has a large-diameter section and a small-diameter section. One end of the large-diameter section of the fixed pipe 41 is installed on one side of the product water pipe 30, and one end of the small-diameter section of the fixed pipe 41 is connected to the drainage mechanism 50. The adjusting assembly 42 is disposed on the inner wall of the large-diameter section of the fixed pipe 41, the resetting assembly 43 is disposed at one end of the adjusting assembly 42, and the sealing assembly 44 is disposed at one end of the resetting assembly 43. The sealing seat 45 is installed on the inner wall of the small-diameter section of the fixed pipe 41, and the inner side of the sealing seat 45 has a conical groove adapted to the sealing assembly 44.

[0049] When the negative pressure pump draws water, the negative pressure in the fixed pipe 41 pulls the sealing assembly 44 out of the sealing seat 45, and at the same time, the drainage mechanism 50 closes, allowing the permeate water in the drainage mechanism 50 to pass through the sealing seat 45 and enter the fixed pipe 41. When the MBR membrane 22 corresponding to the fixed pipe 41 is damaged, the negative pressure inside the fixed pipe 41 will decrease. At this time, the reset assembly 43 drives the sealing assembly 44 into the sealing seat 45, thereby resealing the sealing seat 45 to prevent water from the MBR membrane 22 from continuing to enter the fixed pipe 41. At the same time, the drainage mechanism 50 opens, allowing water from the MBR membrane 22 to flow back into the wastewater treatment tank through the drainage mechanism 50.

[0050] like Figure 1 and Figures 5 to 7 As shown, the adjusting assembly 42 includes a fixed frame 421, a slide rod 422, a movable plate 423, a spring 424, and a water-proof cover 425. The fixed frame 421 is circular and its outer side is mounted on the inner wall of the large-diameter section of the fixed pipe 41. A hole for the slide rod 422 to slide through is opened at the center of the fixed frame 421. The movable plate 423 is mounted on one end of the slide rod 422, and the other end of the slide rod 422 passes through the fixed frame 421 and is connected to the reset assembly 43. The adjusting mechanism 60 abuts against one end of the movable plate 423. The spring 424 is sleeved on the outer side of the slide rod 422, and its two ends are respectively mounted on the fixed frame 421 and the movable plate 423. The water-proof cover 425 is installed between the fixed frame 421 and the movable plate 423 and sleeved on the outer side of the spring 424. The water-proof cover 425 can compress along with the spring 424 to prevent water from contacting the spring 424.

[0051] When it is necessary to seal the fixed tube 41, rotating the adjusting mechanism 60 can push the movable plate 423 to move and compress the spring 424. At this time, the movable plate 423 can drive the sealing component 44 on the reset assembly 43 to move and enter the sealing seat 45 through the slide rod 422, thereby sealing the fixed tube 41.

[0052] like Figures 5 to 7As shown, the reset assembly 43 includes a connecting plate 431, a second spring 432, and a second water-proof cover 433. One end of the connecting plate 431 is mounted on the slide rod 422, and the second spring 432 is mounted on the other end of the connecting plate 431. The second water-proof cover 433 is sleeved on the outside of the second spring 432 and installed between the connecting plate 431 and the sealing assembly 44. The second water-proof cover 433 can compress along with the second spring 432 to prevent water from contacting the second spring 432.

[0053] When the adjusting mechanism 60 pushes the movable plate 423 to move, the movable plate 423 drives the connecting plate 431 to move through the slide rod 422. At the same time, the connecting plate 431 drives the spring 432 to be further compressed, so that the sealing assembly 44 is always kept in the sealing seat 45 under different negative pressure conditions.

[0054] like Figure 1 and Figures 5 to 8 As shown, the sealing assembly 44 includes a sealing plate 441, a fixing rod 442, a sealing block 443, a connecting rod 444, and a push block 445. One end of the second spring 432 and the second water-proof cover 433 are both mounted on the sealing plate 441. The sealing plate 441 is slidably connected to the inner wall of the small-diameter section of the fixed pipe 41 and seals against the fixed pipe 41. The fixing rod 442 is mounted on one end of the sealing plate 441, and the sealing block 443 is mounted on one end of the fixing rod 442. The sealing block 443 is conical in shape and fits the sealing seat 45. One end of the connecting rod 444 is mounted on the sealing block 443, and the other end of the connecting rod 444 passes through the sealing seat 45 and extends into the drainage mechanism 50. The push block 445 is mounted on the other end of the connecting rod 444.

[0055] When a negative pressure is generated inside the fixed pipe 41, the negative pressure drives the sealing plate 441 to move from the small-diameter section of the fixed pipe 41 to the large-diameter section of the fixed pipe 41. At this time, the spring 432 is further compressed. When the sealing plate 441 enters the large-diameter section of the fixed pipe 41, the sealing plate 441 releases the seal with the small-diameter section of the fixed pipe 41, and at the same time, the sealing block 443 releases the seal on the sealing seat 45. At this time, the drainage mechanism 50 is connected to the fixed pipe 41, so that the produced water can enter the fixed pipe 41 through the drainage mechanism 50 and be discharged through the produced water pipe 30.

[0056] like Figure 1 and Figures 3 to 6 as well as Figure 8As shown, the drainage mechanism 50 includes a drain pipe 51, a connecting pipe 52, a limiting component 53, a sealing component 54, and a locking component 55. The drain pipe 51 is a tee pipe. The two ends of the horizontal section of the drain pipe 51 are connected to the fixed pipe 41 and the connecting pipe 52, respectively. One end of the connecting pipe 52 is connected to the water outlet 23. One end of the vertical section of the drain pipe 51 is positioned downwards and connected to the sewage treatment tank via a plastic pipe. The limiting component 53 is rotatably connected to the inner wall of the drain pipe 51. The sealing component 54 is slidably connected to the outer side of the limiting component 53. A push block 445 is slidably disposed within the sealing component 54. The locking component 55 is disposed on the sealing component 54 and connected to the limiting component 53.

[0057] When the sealing plate 441 releases the seal on the sealing seat 45 by driving the sealing block 443 through the fixing rod 442, the sealing block 443 drives the push block 445 to slide in the sealing assembly 54 through the connecting rod 444. At this time, the sealing assembly 54 enters the vertical section of the drain pipe 51 along the limiting assembly 53, thereby closing the vertical section of the drain pipe 51 to prevent the product water from being discharged directly from the vertical section of the drain pipe 51. When the MBR membrane 22 is damaged, the negative pressure inside the fixing pipe 41 will show a downward trend. At this time, the spring 432 pushes the sealing block 443 into the sealing seat 45 through the fixing rod 442 on the sealing plate 441 and seals the sealing seat 45. During the process of the sealing block 443 entering the sealing seat 45, the connecting rod 444 drives the sealing assembly 54 to move out of the vertical section of the drain pipe 51 through the push block 445, so that the subsequent permeate water is discharged through the vertical section of the drain pipe 51, so that the permeate water in the subsequent MBR membrane 22 flows back into the sewage treatment tank, avoiding pollution of the treated permeate water.

[0058] like Figure 5 and Figures 8 to 9 As shown, the limiting component 53 includes a rotating rod 531 rotatably connected to the inner wall of the drain pipe 51, and a sealing component 54 slidably disposed on the outer side of the rotating rod 531. An arc-shaped groove 532 and a sliding groove 533 are formed on the outer side of the rotating rod 531, with the tail end of the arc-shaped groove 532 and the tail end of the sliding groove 533 connected. The depth of the sliding groove 533 is greater than the depth of the arc-shaped groove 532, and a limiting hole 534 adapted to the locking component 55 is formed on the inner bottom wall of the first end of the sliding groove 533.

[0059] As the sealing assembly 54 enters the vertical section of the drain pipe 51 along the rotating rod 531, the locking assembly 55 slides from the first end to the last end of the arc-shaped groove 532. When the sealing assembly 54 enters the vertical section of the drain pipe 51, the locking assembly 55 moves from the last end of the arc-shaped groove 532 into the slide groove 533. When the sealing assembly 54 moves out of the vertical section of the drain pipe 51, the locking assembly 55 moves from the last end of the slide groove 533 to the first end of the slide groove 533 and inserts into the limiting hole 534 of the slide groove 533 to lock the sealing assembly 54, preventing the sealing assembly 54 from blocking the vertical section of the drain pipe 51 again, so that the permeate after the MBR membrane 22 is damaged can continuously flow back to the wastewater treatment tank.

[0060] Continue to refer to Figure 5 and Figures 8 to 9 As shown, the sealing assembly 54 includes a sliding plate 541, a first wedge 544, a second wedge 545, and a sealing plate 546. A slot 542 for inserting a pusher block 445 is provided on one side of the sliding plate 541, and an insertion hole 543 for sliding a rotating rod 531 is provided at one end of the sliding plate 541. The first wedge 544 and the second wedge 545 are installed diagonally on both sides of the sliding plate 541. The second wedge 545 has a clearance groove for the connecting rod 444 to pass through. Both the first wedge 544 and the second wedge 545 can contact the pusher block 445. The sealing plate 546 is installed on the sliding plate 541 and can seal against the vertical section of the drain pipe 51.

[0061] When the sealing block 443 releases the seal of the sealing seat 45, the push block 445 contacts the second wedge block 545. At this time, the second wedge block 545 drives the sealing plate 546 to move through the sliding plate 541 and seals the vertical section of the drain pipe 51, allowing the produced water to pass through the drain pipe 51 and enter the fixed pipe 41. At this time, one end of the push block 445 contacts the first wedge block 544. When the sealing block 443 seals with the sealing seat 45 again, the push block 445 drives the sliding plate 541 to reset through the first wedge block 544, so that the sealing plate 546 moves out of the vertical section of the drain pipe 51. When the sliding plate 541 is fully reset, the locking assembly 55 is inserted into the limiting hole 534 on the rotating rod 531 to lock the sliding plate 541. At the same time, the sliding plate 541 locks the push block 445 through the second wedge block 545 to prevent the sealing plate 441 from re-entering the large-diameter section of the fixed pipe 41 under negative pressure.

[0062] like Figures 8 to 10As shown, the locking assembly 55 includes a movable rod 551, a spring 553, and a insert rod 554. The movable rod 551 is threaded into the interior of the slide plate 541, and a mounting groove 552 is formed at the bottom end of the movable rod 551. One end of the spring 553 is mounted on the inner wall of the mounting groove 552, and the other end of the spring 553 is mounted on the insert rod 554. One end of the insert rod 554 passes through the movable rod 551 and extends to the outside of the movable rod 551. In the initial state, the bottom end of the insert rod 554 is located at the beginning of the arc-shaped groove 532 of the rotating rod 531 and contacts the inner wall of the arc-shaped groove 532, and the spring 553 is in a compressed state.

[0063] When push block 445, via wedge block 2 545, drives the sealing plate 546 on slide plate 541 into the vertical section of drain pipe 51, insert rod 554 slides from the first end to the last end of arc groove 532. When sealing plate 546 enters the vertical section of drain pipe 51, insert rod 554 moves from the last end of arc groove 532 into slide groove 533. When sealing plate 546 moves out of the vertical section of drain pipe 51, insert rod 554 moves from the last end to the first end of slide groove 533. When insert rod 554 aligns with the limiting hole 534 in slide groove 533, spring 3 553 resets and pushes insert rod 554 into limiting hole 534 to lock sealing plate 546, preventing sealing plate 546 from blocking the vertical section of drain pipe 51 again.

[0064] like Figure 1 and Figures 5 to 6 As shown, the adjusting mechanism 60 includes an adjusting rod 61 and adjusting members 62. The adjusting rod 61 is rotatably connected between fixed tubes 41 in multiple sealing mechanisms 40, and an adjusting block is installed at the head end of the adjusting rod 61 to drive the adjusting rod 61 to rotate. There are multiple adjusting members 62, which are sequentially installed on the outside of the adjusting rod 61 and located inside the fixed tube 41. The adjusting member 62 is a cam, and in the initial state, the adjusting member 62 is tilted and abuts against the movable plate 423.

[0065] When the adjusting rod 61 is rotated, it pushes the movable plate 423 to move via the adjusting member 62. The movable plate 423 drives the spring 432 to be further compressed via the connecting plate 431 on the slide rod 422, thereby increasing the resistance of the sealing block 443 to disengage from the sealing seat 45, so that the sealing block 443 can adapt to different intensities of negative pressure.

[0066] Working principle: When treating wastewater, the negative pressure pump is started, creating negative pressure inside the fixed pipe 41. This negative pressure drives the sealing plate 441 from the small-diameter section of the fixed pipe 41 to the large-diameter section, compressing the spring 432. When the sealing plate 441 enters the large-diameter section of the fixed pipe 41, it releases the seal between itself and the small-diameter section, and simultaneously, the sealing block 443 releases the seal on the sealing seat 45, allowing the produced water to enter the fixed pipe 41 through the drain pipe 51 and exit through the produced water pipe 30.

[0067] During the process of releasing the seal of the sealing seat 45, the push block 445, through the wedge block 545, drives the sealing plate 546 on the slide plate 541 to move and seal the vertical section of the drain pipe 51. During the movement of the slide plate 541, the insertion rod 554 slides from the first end of the arc groove 532 to the last end of the arc groove 532. When the sealing plate 546 enters the vertical section of the drain pipe 51, the insertion rod 554 is transferred from the last end of the arc groove 532 to the sliding groove 533.

[0068] When one of the MBR membranes 22 is damaged, the negative pressure in the corresponding fixed tube 41 will immediately decrease. At this time, under the action of the spring 432, the negative pressure in the fixed tube 41 is insufficient to keep the sealing plate 441 in the large diameter section of the fixed tube 41, so that the sealing plate 441 can be reset, and the sealing block 443 can be sealed with the sealing seat 45 again.

[0069] During the process of sealing the sealing seat 45 again by the sealing block 443, the push block 445 drives the sliding plate 541 to reset via the wedge block 544, so that the sealing plate 546 moves out of the vertical section of the drain pipe 51. During the reset process of the sliding plate 541, the insertion rod 554 moves from the tail end of the slide groove 533 to the head end of the slide groove 533. When the sliding plate 541 is fully reset, the insertion rod 554 corresponds to the limiting hole 534 in the slide groove 533. At this time, the spring 3 553 resets and pushes the insertion rod 554 into the limiting hole 534 to lock the sealing plate 546. At the same time, the sliding plate 541 locks the push block 445 via the wedge block 2 545 to prevent the sealing plate 441 from re-entering the large-diameter section of the fixed pipe 41 under the action of negative pressure. This allows the permeate water in the subsequent MBR membrane 22 to flow back into the sewage treatment tank through the drain pipe 51, avoiding pollution of the treated permeate water. The opening status of the drain pipe 51 can also be used to determine whether the MBR membrane 22 is damaged, which facilitates maintenance.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flat-sheet membrane module for wastewater treatment, comprising a frame, a plurality of treatment units disposed within the frame, and a permeate pipe mounted on the frame, characterized in that, The water production pipe is equipped with multiple sealing mechanisms, and a drainage mechanism is connected to each sealing mechanism. The drainage mechanism is connected to the treatment mechanism. The sealing mechanism includes a fixed pipe installed on the water production pipe, an adjusting component installed on the inner wall of the fixed pipe, a reset component elastically connected to the adjusting component, a sealing component disposed on the reset component, and a sealing seat disposed on the outside of the sealing component. The fixed pipe has a large-diameter section and a small-diameter section. The adjusting component is installed in the large-diameter section of the fixed pipe, and the sealing seat is installed in the small-diameter section of the fixed pipe. The sealing component can seal the fixed pipe by inserting into the sealing seat. The drainage mechanism includes a drain pipe installed on a fixed pipe, a limiting component rotatably connected to the inner wall of the drain pipe, a sealing component slidably connected in the drain pipe, and a locking component set on the sealing component. The drain pipe is connected to the processing mechanism. The end of the sealing component slides in the sealing component. When the sealing component is disengaged from the sealing seat, it can drive the sealing component to seal the drain pipe. The reset assembly includes a connecting plate; The sealing assembly includes a sealing plate, a sealing block, a connecting rod, and a pusher. The sealing plate is elastically connected to the connecting plate and slidably connected to the small-diameter section of the fixed pipe. The sealing block is mounted on the sealing plate and is tapered in shape and adapted to the sealing seat. One end of the connecting rod is mounted on the sealing block, and the pusher is mounted on the other end of the connecting rod and slidably connected in the sealing assembly.

2. The MBR flat-sheet membrane module for wastewater treatment according to claim 1, characterized in that, The adjustment assembly includes a fixed frame, a slide rod, and a movable plate. The fixed frame is installed in the large-diameter section of the fixed pipe, the slide rod is slidably connected in the fixed frame, the movable plate is installed at one end of the slide rod, and the other end of the slide rod is connected to the reset assembly.

3. The MBR flat-sheet membrane module for wastewater treatment according to claim 2, characterized in that, One end of the connecting plate is mounted on the slide rod, and the other end of the connecting plate is elastically connected to the sealing assembly.

4. The MBR flat-sheet membrane module for wastewater treatment according to claim 3, characterized in that, A water-proof cover is installed between the fixed frame and the movable plate, and a water-proof cover is installed between the connecting plate and the sealing plate.

5. The MBR flat-sheet membrane module for wastewater treatment according to any one of claims 1-4, characterized in that, The drain pipe is a tee pipe, with one end of the vertical section facing downwards and connected to the sewage treatment tank. The sealing component can enter the vertical section of the drain pipe.

6. The MBR flat-sheet membrane module for wastewater treatment according to claim 1, characterized in that, The limiting component includes a rotating rod rotatably connected to the drain pipe, and the sealing component is slidably disposed on the rotating rod. An arc-shaped groove and a sliding groove are provided on the outer side of the rotating rod. The tail end of the arc-shaped groove and the tail end of the sliding groove are connected. The depth of the sliding groove is greater than the depth of the arc-shaped groove. A limiting hole adapted to the locking component is provided on the inner bottom wall of the first end of the sliding groove.

7. The MBR flat-sheet membrane module for wastewater treatment according to claim 6, characterized in that, The sealing assembly includes a sliding plate, a first wedge, a second wedge, and a sealing plate. The sliding plate has a slot on one side that matches the push block, and a hole at one end for the rotating rod to slide. The first and second wedges are installed diagonally on both sides of the sliding plate, and the sealing plate is installed on the sliding plate and can seal with the vertical section of the drain pipe.

8. The MBR flat-sheet membrane module for wastewater treatment according to claim 7, characterized in that, The locking assembly includes a movable rod and a plug rod. The movable rod is threaded onto the slide plate, and a mounting groove is provided at the bottom end of the movable rod. One end of the plug rod is elastically connected to the mounting groove, and the other end of the plug rod passes through the movable rod and extends to the outside of the movable rod.

9. The MBR flat-sheet membrane module for wastewater treatment according to claim 8, characterized in that, An adjusting rod is rotatably connected between the plurality of fixed tubes, and a plurality of adjusting components are installed on the adjusting rod. The plurality of adjusting components are respectively located in the fixed tubes and abut against the movable plate.

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