MBR (Membrane Bioreactor) for deeply treating sewage in urban sewage treatment plant

Abstract

The invention belongs to the technical field of sewage treatment, particularly relates to an MBR (Membrane Biological Reactor) for deeply treating sewage in an urban sewage treatment plant, and provides the following scheme aiming at the problems that the sewage treatment process is interrupted, the cleaning is incomplete, aeration holes are blocked by dirt and the like in the existing membrane filter tube cleaning process. The sewage treatment device comprises a sewage tank, two treatment tanks are arranged in the sewage tank, fixed pipes are fixed in the two treatment tanks, the outer walls of the two fixed pipes are rotationally sleeved with two hollow rotating discs, and a plurality of membrane filter pipes are rotationally connected between the two hollow rotating discs located in the same treatment tank. The treatment tanks can be alternately used when the membrane filter tube is cleaned, sewage treatment can be continuously completed, the membrane filter tube can be cleaned, the inner wall of the membrane filter tube can be uniformly coated with a cleaning agent in the cleaning process, and the membrane filter tube is effectively cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant. Background Art

[0002] MBR membrane-bioreactor is a new type of wastewater treatment system that organically combines membrane separation technology with biological treatment technology. It replaces the secondary sedimentation tank at the end of traditional biological treatment technology with membrane components, maintains a high concentration of activated sludge in the bioreactor, increases the organic load of biological treatment, thereby reducing the footprint of sewage treatment facilities and reducing the amount of residual sludge by maintaining a low sludge load. It mainly uses membrane separation equipment immersed in an aerobic biological pool to intercept the activated sludge and macromolecular organic matter in the tank.

[0003] In the prior art, the following deficiencies still exist when treating sewage through MBR membrane-bioreactor:

[0004] 1. The surface of the membrane filter tube is used to clean the sludge particles, but a large amount of dirt will adhere to the surface of the membrane filter tube over a long period of time, which will cause the entire sewage treatment process to be interrupted during cleaning, affecting the efficiency of sewage treatment;

[0005] 2. The membrane filter tube cannot be cleaned effectively and thoroughly, which affects the filtering effect of the membrane filter tube in the later stage;

[0006] 3. Aeration is generally required during sewage treatment. Oxygen is essential for maintaining the healthy operation of the biological community in sewage and can promote the decomposition of organic matter and the conversion of nitrogen. However, if the aeration pipe is in the sewage pool for a long time, the aeration holes will be easily blocked by dirt in the sewage pool, affecting the aeration effect in the later stage.

[0007] In view of the above problems, the present invention document proposes an MBR membrane bioreactor for deep sewage treatment in urban sewage treatment plants. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings of the existing membrane filter tube cleaning, which leads to the interruption of the entire sewage treatment process, the inability to effectively and comprehensively clean the membrane filter tube, and the aeration holes being blocked by dirt in the sewage pool. The MBR membrane bioreactor for deep sewage treatment in urban sewage treatment plants is proposed.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant comprises a sewage pool, wherein two treatment pools are arranged in the sewage pool, wherein fixed pipes are fixed in both treatment pools, wherein two hollow rotating disks are rotatably sleeved on the outer walls of the two fixed pipes, wherein a plurality of membrane filter tubes are rotatably connected between the two hollow rotating disks in the same treatment pool, and wherein the two treatment pools and the plurality of membrane filter tubes cooperate to alternately complete sewage treatment;

[0011] The outer wall of the fixed tube is provided with a plurality of through holes, and the hollow rotating disk is connected with the fixed tube through the plurality of through holes;

[0012] It also includes a medicine storage box fixed on the top of the sewage pool, a multi-stage cylinder is fixed on the top of the medicine storage box, the output shaft of the multi-stage cylinder extends into the medicine storage box and is fixed with a sealing plate, and the sealing plate is sealed and slid in the medicine storage box, and is used to inject cleaning agents into multiple membrane filter tubes in the two treatment pools;

[0013] It also includes a three-way pipe fixed on one side of the sewage pool, and the liquid inlet end of the three-way pipe is connected to the external sewage sedimentation tank, and the two liquid outlet ends of the three-way pipe are respectively connected to the two treatment pools, and the inner wall of one side of the two treatment pools is slidably connected with the same closing plate, which is used to alternately block the two liquid outlet ends of the three-way pipe;

[0014] Among them, transfer pipes are fixed on the inner walls of the two treatment pools on the sides away from each other, which are used to inject air into the treatment pools;

[0015] A control structure, disposed on one side of the closing plate, for controlling the movement of the closing plate;

[0016] an aeration structure, disposed in the treatment tank, for injecting air into the treatment tank;

[0017] The medicine injection structure is arranged in the medicine storage box and is used to inject cleaning agents into the membrane filter tube to remove dirt attached to the outer wall of the membrane filter tube;

[0018] The flushing structure is arranged in the treatment tank and is used to clean the residual cleaning agent on the membrane filter tube.

[0019] In a possible design, the control structure includes two trapezoidal blocks fixed on one side of the closing plate, and the two trapezoidal blocks are respectively located in two treatment tanks, and a plurality of push plates are fixed on one side of the two hollow rotating disks close to each other, and the trapezoidal blocks cooperate with adjacent push plates; the hollow rotating disk drives the push plate to rotate, and the push plate cooperates with the inclined surface of the trapezoidal block to drive the trapezoidal block and the closing plate to move. At this time, the closing plate can just block one liquid inlet end of the three-way pipe, and the magnet block and the closing plate generate magnetic attraction to ensure the stability of the sealing of one end of the magnet block by the closing plate, so that the treatment tank can be replaced, which can not only continue to complete the sewage treatment but also clean the membrane filter tube.

[0020] In one possible design, the aeration structure includes a plurality of aeration tubes rotating on the inner wall of one side of the treatment tank, one end of each of the aeration tubes being rotatably connected to a transfer tube, and the aeration tubes are communicated with the transfer tube, an air injection tube is fixed to one side of the transfer tube, one end of the air injection tube is fixedly extended to one side of the sewage tank and is communicated with an external blower, a plurality of arc-shaped baffles are fixed to the inner wall of the bottom of the treatment tank through pillars, and the aeration tubes are rotatably arranged in the arc-shaped baffles for supporting the aeration tubes; air is injected into the aeration tubes through the blower, the air injection tubes and the transfer tube, and air is injected into the treatment tank through the aeration tubes for sewage treatment.

[0021] In a possible design, the flushing structure includes a rotating rod that rotates on the top of the sewage pool through a base, the outer wall of the rotating rod is fixedly sleeved with two second rubber wheels, and the two second rubber wheels are respectively matched with two hollow rotating disks to drive the hollow rotating disks to rotate, the outer walls of the plurality of membrane filter tubes are fixedly sleeved with two first rubber wheels, two adjacent first rubber wheels on the same side touch each other, and the two first rubber wheels are transmission-connected, the inner wall of the treatment pool on one side away from each other is fixed with an arc plate, and the arc plate touches the first rubber wheel, and the friction between the arc plate and the first rubber wheel drives the first rubber wheel to rotate, and one side of the sewage pool is connected by a frame A first water pump is fixed, one end of the fixed pipe is fixedly passed through the inner wall of one side of the sewage pool and extends to one side of the sewage pool, a first three-way valve is fixed to the bottom of the fixed pipe through a hose, one port of the first three-way valve is connected with the first water pump, and is used to extract water treated by the membrane filter tube, and the other port of the first three-way valve is fixed with a first water inlet pipe, and the first water inlet pipe is connected with an external water source, and is used to inject clean water into the hollow rotating disk and the membrane filter tube; clean water is injected into the fixed pipe through the cooperation of the first water inlet pipe and the first three-way valve, and the clean water is injected into the corresponding hollow rotating disk through the through hole and enters the membrane filter tube, thereby flushing the inside of the membrane filter tube.

[0022] In a possible design, the flushing structure also includes two closing blocks fixed in the fixed tube, a reciprocating threaded rod is rotatably connected between the two closing blocks, a nut block is provided with a threaded sleeve on the outer wall of the reciprocating threaded rod, a rectangular groove is provided on the top of the fixed tube, a connecting block fixedly connected to the nut block is slidably connected in the rectangular groove, a liquid storage ring is provided with a sliding sleeve on the outer wall of the fixed tube, the top of the connecting block is fixedly connected to the inner wall of the top of the liquid storage ring, a plurality of nozzles are fixed on the outer wall of the liquid storage ring for flushing the outer wall of the rotating medium membrane filter tube, one end of the reciprocating threaded rod rotates through one of the closing blocks and extends to one side of the fixed tube, and a synchronous wheel, A synchronous belt transmission connection is used to drive the liquid storage ring to reciprocate. A third water pump is fixed to one side of the sewage pool through a frame. The liquid inlet of the third water pump is connected with an external water source through a hose. The liquid outlet of the third water pump is fixed with a second water inlet pipe. The second water inlet pipe is fixedly penetrated through the closing block and is connected with the liquid storage ring to provide clean water to the nozzle. The third water pump cooperates with the second water inlet pipe to inject clean water into the liquid storage ring, and the clean water is sprayed outward through the nozzle. The reciprocating threaded rod drives the liquid storage ring to move reciprocatingly in a straight line through the nut block. Multiple nozzles flush the outer wall of the rotating membrane filter tube. The combination of inside and outside can fully complete the flushing operation of the membrane filter tube to avoid residual cleaning agents in the membrane filter tube and affect the later sewage treatment effect.

[0023] In one possible design, the drug injection structure includes two drug injection tubes fixed at the bottom of the drug storage box, and the two drug injection tubes are respectively used to provide cleaning agents to multiple membrane filter tubes in two treatment pools, the bottom ends of the drug injection tubes are connected to the fixed tubes, and the drug injection tubes cooperate with the through holes to inject cleaning agents into the corresponding hollow rotating disks, the bottom inner wall of the drug storage box is rotatably connected to two rotating plates through a rotating shaft, and the two rotating plates are respectively used to seal the two drug injection tubes, and the two rotating plates are each provided with a first clearance groove, and the two first clearance grooves are both slidably fitted with a first pin rod, and the same U-shaped frame is fixed at both ends of the first pin rod, and two pull rods are sealingly and slidingly penetrated through the bottom inner wall of the drug storage box, and the top ends of the two pull rods are respectively fixedly connected to the bottom of the corresponding U-shaped frames, and the bottom ends of the two pull rods are fixed with push plates, and the bottom of the drug storage box is provided with two centrifugal structures, and the push plates and the centrifugal structures The structure is used to drive the rotating plate to rotate to complete the opening and closing of the injection tube; the rotating rod drives the turntable to rotate when rotating, and the centrifugal block moves outward under the action of centrifugal force, the tension spring is stretched, and the centrifugal block drives the push plate and the pull rod to move downward, and the pull rod drives the rotating plate to rotate through the cooperation of the first pin rod and the first give way groove, thereby releasing the blocking of the injection tube by the rotating plate, and the output shaft of the multi-stage cylinder pushes the sealing plate to move downward, which is used to quickly inject the cleaning agent into the fixed tube through the injection tube, and enter the corresponding hollow rotating disk through the through hole, and then enter the membrane filter tube through the hollow rotating disk. Since the second rubber wheel drives the hollow rotating disk to rotate, the hollow rotating disk drives multiple membrane filter tubes to rotate, and the adjacent two membrane filter tubes are connected by the first rubber wheel transmission. Therefore, under the action of the arc plate, multiple membrane filter tubes can be driven to rotate. At this time, the cleaning agent in the membrane filter tube can be evenly distributed in the membrane filter tube, and the dirt can be comprehensively and effectively removed.

[0024] In a possible design, the centrifugal structure includes a turntable rotating under the medicine storage box, and a plurality of sliding grooves are provided on one side of the turntable, and a plurality of sliding grooves are slidably connected with centrifugal blocks, and the centrifugal blocks cooperate with a push plate to drive the push plate to move, and a tension spring is fixed on one side of the plurality of centrifugal blocks, and the ends of the plurality of tension springs close to each other are respectively fixedly connected to the inner wall of one side of the corresponding sliding groove, and the other side of the turntable is fixedly connected to one end of an adjacent rotating rod; the rotating rod drives the turntable to rotate when it rotates, and the centrifugal block moves outward under the action of centrifugal force, the tension spring is stretched, and the centrifugal block drives the push plate and the pull rod to move downward, and the pull rod drives the rotating plate to rotate through the cooperation of the first pin rod and the first give way groove, thereby releasing the blocking of the rotating plate on the medicine injection tube.

[0025] In a possible design, a second water pump is fixed to a side of the sewage pool away from the three-way pipe through a frame, a second three-way valve is fixed to the liquid inlet end of the second water pump, and two liquid inlet ports of the second three-way valve are connected to the two treatment pools through a hose, and a third three-way valve is fixed to the liquid outlet end of the second water pump, and two liquid outlet ports of the third three-way valve are connected to the two treatment pools through a hose; the second water pump cooperates with the third three-way valve and the third three-way valve to discharge the remaining sewage in the treatment pool into another treatment pool according to the situation, so as to facilitate the cleaning of the membrane filter tube in the later stage.

[0026] In a possible design, a magnet stopper is fixed to the inner wall of one side of the two treatment pools, and an iron sheet layer is fixed to both sides of the closing plate. A magnetic attraction force is generated between the magnet stopper and the iron sheet layer to control the stability of the closing plate.

[0027] In a possible design, a driving structure is provided in each of the two treatment tanks, and the driving structure is used to drive the multiple aeration pipes in the treatment tanks to rotate;

[0028] The driving structure includes a gear rotating in the treatment tank, and the gear is fixedly sleeved on the outer wall of one of the aeration pipes, and the outer walls of the plurality of aeration pipes are connected by synchronous wheels and synchronous belt transmission. A push rod is slidably penetrated in the sewage tank, and a rack is fixed on the bottom end of the push rod, and the rack is meshed with the gear to drive the aeration pipe to rotate. A second pin is fixedly penetrated on the top end of the push rod, and a second clearance groove is provided on the inner wall of the rotating plate away from each other, and the two ends of the second pin extend into the two second clearance grooves respectively, and the second pin is slidably matched with the second clearance groove; when the second water pump is turned on, the second water pump is turned on. When sewage in one treatment tank is pumped into another treatment tank, the rotating rod rotates quickly to drive the rotating plate to rotate and release the blockage of the injection tube. At this time, the rotating plate drives the rack to move upward through the cooperation of the second give way groove and the second pin rod, and the rack drives one of the aeration tubes to rotate through the gear, and multiple aeration tubes are connected through synchronous wheels and synchronous belts. Therefore, the aeration tube rotates 180°, and the arc baffle closes the aeration holes of the aeration tube to prevent dirt from blocking the aeration holes as the water level decreases during the sewage extraction process. When the water level is lower than the arc baffle, the rotating rod rotates slowly to flush the membrane filter tube.

[0029] Beneficial effects: In the present invention, the bottom inner wall of the medicine storage box is rotatably connected to two rotating plates, a first pin rod is slidably matched in the rotating plate through a first giving way groove, the top end of the pull rod is fixedly connected to the bottom of the U-shaped frame, and a push plate is fixed to the bottom end of the pull rod. The bottom of the medicine storage box is provided with two centrifugal structures, and the push plates cooperate with the centrifugal structures; the centrifugal block moves outward under the action of centrifugal force, and the centrifugal block drives the rotating plate to rotate through the cooperation of the push plate and the pull rod, thereby releasing the blockage of the medicine injection tube, and the cleaning agent can enter the membrane filter tube through the hollow rotating disk, and while the hollow rotating disk drives the multiple membrane filter tubes to revolve, the multiple membrane filter tubes also rotate, so that the cleaning agent can be evenly distributed in the membrane filter tube, and the dirt can be removed comprehensively and effectively;

[0030] In the present invention, a three-way pipe is fixed on one side of the sewage pool, and the two liquid outlet ends of the three-way pipe are respectively connected to the two treatment pools, and the inner walls of one side of the two treatment pools are slidably connected with the same closing plate, and two trapezoidal blocks on one side of the closing plate are matched with adjacent pushing plates; the hollow rotating disk drives the pushing plate to rotate, and the pushing plate cooperates with the inclined surface of the trapezoidal block to drive the trapezoidal block and the closing plate to move, at which time the closing plate can just block one liquid inlet end of the three-way pipe, and the magnet block and the closing plate generate magnetic attraction to ensure the stability of the closing plate blocking one end of the magnet block, so that the treatment pool can be replaced, which can not only continue to complete the sewage treatment but also clean the membrane filter tube;

[0031] In the present invention, the outer wall of the rotating rod is fixedly sleeved with two second rubber wheels, the outer walls of the plurality of membrane filter tubes are fixedly sleeved with two first rubber wheels, the two first rubber wheels are transmission-connected, the inner walls of the treatment pools on one side away from each other are fixed with arc plates, a first three-way valve is fixed to the bottom of the fixed tube through a hose, and a first water inlet pipe is fixed to the other port of the first three-way valve; clean water is injected into the fixed tube through the cooperation of the first water inlet pipe and the first three-way valve, and the clean water is injected into the corresponding hollow rotating disk through the through hole and enters the membrane filter tube, thereby flushing the interior of the membrane filter tube.

[0032] In the present invention, a reciprocating threaded rod is rotatably connected between the two closing blocks, a nut block is provided on the threaded sleeve of the outer wall of the reciprocating threaded rod, a liquid storage ring is fixed to the nut block through the connecting block, a plurality of nozzles are fixed to the outer wall of the liquid storage ring, the reciprocating threaded rod and the rotating rod are connected by a synchronous wheel and a synchronous belt transmission; the third water pump cooperates with the second water inlet pipe to inject clean water into the liquid storage ring, and the clean water is sprayed to the outside through the nozzle, the reciprocating threaded rod drives the liquid storage ring to move back and forth in a straight line through the nut block, and the plurality of nozzles flush the outer wall of the rotating membrane filter tube, and the combination of inside and outside can fully complete the flushing operation of the membrane filter tube, avoid residual cleaning agent in the membrane filter tube, and affect the later sewage treatment effect.

[0033] In the present invention, the gear is fixedly sleeved on the outer wall of one of the aeration tubes, and the outer walls of the plurality of aeration tubes are connected by synchronous wheels and synchronous belt transmission. A rack is fixed to the bottom end of the push rod, and a second pin is fixedly passed through the top end of the push rod. The inner walls of the rotating plate on the side away from each other are provided with second makeshift grooves, and the two ends of the second pin extend into the two second makeshift grooves respectively. The rotating plate drives the rack to move upward through the cooperation of the second makeshift groove and the second pin, and drives the aeration tube to rotate 180° through the gear. The arc-shaped baffle closes the aeration hole of the aeration tube to prevent dirt from blocking the aeration hole as the water level decreases during the sewage extraction process.

[0034] In the present invention, when cleaning the membrane filter tube, the treatment pools can be used alternately, so that the sewage treatment can be continued and the membrane filter tube can be cleaned. In the process of cleaning, the inner wall of the membrane filter tube can be evenly coated with the cleaning agent, so the membrane filter tube can be effectively cleaned. In addition, after cleaning, the membrane filter tube can be cleaned from the inside and the outside of the membrane filter tube simultaneously, so as to comprehensively and effectively complete the cleaning of the membrane filter tube. When the cleaning agent is injected, the aeration tube can also be driven to rotate to prevent the dirt in the sewage from clogging the aeration holes of the aeration tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a three-dimensional structure from a first perspective of an MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant provided in Example 1 of the present invention;

[0036] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0037] Figure 3 This is a schematic diagram of the main cross-sectional structure of the hollow rotating disk and fixed pipe of the MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant provided in Example 1 of the present invention;

[0038] Figure 4 A schematic diagram of a three-dimensional explosion structure of a hollow rotating disk, an arc plate, a membrane filter tube and a second rubber wheel of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0039] Figure 5 A schematic diagram of a partial three-dimensional cross-sectional structure of a fixed pipe and a liquid storage ring of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0040] Figure 6 A schematic diagram of a three-dimensional exploded structure of a push plate, a trapezoidal block and a tee pipe of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0041] Figure 7 A partial three-dimensional cross-sectional structural schematic diagram of the third water pump of the MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant provided in Example 1 of the present invention;

[0042] Figure 8 A schematic diagram of a three-dimensional exploded structure of a rotating plate, a U-shaped frame and a push plate of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0043] Fig. 9 A schematic diagram of a three-dimensional exploded structure of a push plate, a centrifugal block and a rotating disk of an MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 1 of the present invention;

[0044] Fig.10 A schematic diagram of the three-dimensional structure of a MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant provided in Example 1 of the present invention from a second perspective;

[0045] Fig.11 This is a schematic diagram of the three-dimensional matching structure of the aeration pipe, the rotating plate and the rack of the MBR membrane bioreactor for deep sewage treatment in the urban sewage treatment plant provided by Example 2 of the present invention;

[0046] Fig.12 This is a schematic diagram of the three-dimensional cross-sectional coordination structure of the rotating plate of the MBR membrane bioreactor for deep sewage treatment in an urban sewage treatment plant provided in Example 2 of the present invention.

[0047] In the figure: 1, sewage pool; 2, treatment pool; 3, fixed pipe; 4, through hole; 5, hollow rotating disk; 6, membrane filter tube; 7, first rubber wheel; 8, arc plate; 9, rotating rod; 10, second rubber wheel; 11, first three-way valve; 12, first water pump; 13, first water inlet pipe; 14, push plate; 15, three-way pipe; 16, closing plate; 17, trapezoidal block; 18, magnet stopper; 19, second water pump; 20, second three-way valve; 21, third three-way valve; 22, closing block; 23, reciprocating threaded rod; 24, nut block; 25, liquid storage ring ; 26. Nozzle; 27. The third water pump; 28. The second water inlet pipe; 29. ​​Sealing plate; 30. Medicine injection pipe; 31. Rotating plate; 32. The first clearance groove; 33. The first pin rod; 34. U-shaped frame; 35. Pull rod; 36. Push plate; 37. Turntable; 38. Sliding groove; 39. Centrifugal block; 40. Tension spring; 41. Transfer pipe; 42. Air injection pipe; 43. Aeration pipe; 44. Arc baffle; 45. Gear; 46. Rack; 47. Push rod; 48. The second clearance groove; 49. The second pin rod; 50. Medicine storage box; 51. Multi-stage cylinder. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] Example 1: Reference Figure 1-Figure 4 , MBR membrane bioreactor, which is used in the field of sewage treatment, mainly includes a sewage pool 1, the interior of the sewage pool 1 is divided into two independent and adjacent treatment pools 2. A fixed pipe 3 is fixed in each treatment pool 2, and a plurality of through holes 4 are evenly distributed on the outer wall of the fixed pipe 3. Around each fixed pipe 3, two hollow rotating disks 5 are rotatably sleeved on the outer wall of the fixed pipe 3 through the through holes 4, and the two hollow rotating disks 5 are rotatably connected by a plurality of membrane filter tubes 6. The arrangement of the treatment pool 2 and the membrane filter tube 6 enables the two treatment pools 2 to alternately perform sewage treatment work.

[0050] Reference Figure 1 , Figure 3 and Figure 7 A medicine storage box 50 is fixedly installed on the top of the sewage tank 1, and a multi-stage cylinder 51 is installed on the top of the medicine storage box 50. The output shaft of the multi-stage cylinder 51 extends into the inside of the medicine storage box 50 and is fixedly connected to a sealing plate 29. The sealing plate 29 can slide in a sealed manner in the medicine storage box 50. When it is necessary to inject a cleaning agent into the membrane filter tube 6, the multi-stage cylinder 51 drives the sealing plate 29 to move and release the agent into the membrane filter tube 6 to remove the dirt attached to the outer wall of the membrane filter tube 6.

[0051] Reference Figure 1 and Figure 6 The sewage is introduced from the external sewage sedimentation tank through the liquid inlet end of the three-way pipe 15, and the two liquid outlet ends of the three-way pipe 15 are respectively connected to the two treatment tanks 2. A closing plate 16 is slidably connected to the inner wall of one side of the two treatment tanks 2, and the closing plate 16 can slide between the two treatment tanks 2 to alternately block the two liquid outlet ends of the three-way pipe 15, thereby realizing alternating treatment of sewage.

[0052] Reference Figure 1 and Figure 6 The control structure includes two trapezoidal blocks 17 fixed on one side of the closing plate 16, and the two trapezoidal blocks 17 are respectively located in the two treatment tanks 2. A plurality of push plates 14 are fixed on one side of two hollow rotating disks 5 close to each other.

[0053] Specifically, when the hollow rotating disk 5 rotates, the push plate 14 will cooperate with the inclined surface of the trapezoidal block 17 to drive the trapezoidal block 17 and the closing plate 16 to move. During the movement, the closing plate 16 will alternately block the two liquid outlets of the three-way pipe 15 to achieve alternating treatment of sewage. At the same time, in order to increase the stability of the closing plate 16, a magnet block 18 is also provided in the treatment tank 2 to generate a magnetic attraction with the closing plate 16 to ensure that the closing plate 16 can stably block the liquid outlet.

[0054] Reference Figure 2 The aeration structure includes a plurality of aeration tubes 43 rotatably mounted on the inner wall of one side of each treatment tank 2. One end of these aeration tubes 43 is rotatably connected and communicated with the transfer tube 41, and the transfer tube 41 is communicated with the external blower through the air injection tube 42. One end of the air injection tube 42 is fixedly extended to one side of the sewage tank 1 to facilitate the connection of the blower. A plurality of arc-shaped baffles 44 are fixed to the inner wall of the bottom of the treatment tank 2 through pillars, and the aeration tubes 43 are rotatably set in the arc-shaped baffles 44 to obtain stable support. When the blower is working, air enters the aeration tube 43 through the air injection tube 42 and the transfer tube 41, and then the air is injected into the treatment tank 2 by the aeration tube 43 to promote the sewage treatment process.

[0055] Reference Figure 2-Figure 5 The flushing structure includes a rotating rod 9 installed on the top of the sewage pool 1 through a base, and the rotating rod 9 can rotate freely. On the outer wall of the rotating rod 9, two second rubber wheels 10 are fixedly sleeved, and the two second rubber wheels 10 are respectively in contact with the sides of the two hollow rotating disks 5. When the rotating rod 9 rotates, the hollow rotating disks 5 are driven to rotate by friction. On the outer wall of each membrane filter tube 6, two first rubber wheels 7 are fixedly sleeved, and the two adjacent first rubber wheels 7 on the same side touch each other and are connected by transmission, so that they can rotate synchronously. On the inner wall of the treatment pool 2, an arc plate 8 is fixed, and the arc plate 8 contacts the first rubber wheel 7, and the first rubber wheel 7 is driven to rotate by friction, thereby driving the entire membrane filter tube 6 to rotate. On one side of the sewage pool 1, a first water pump 12 is fixed through a frame, and the liquid inlet of the first water pump 12 is connected to the fixed pipe 3 through a hose. One end of the fixed pipe 3 passes through the inner wall of one side of the sewage pool 1 and extends to the inside of the sewage pool 1. At the bottom of the fixed pipe 3, a first three-way valve 11 is connected through a hose, one port of the first three-way valve 11 is connected to a first water pump 12 for extracting water treated by the membrane filter tube 6; the other port is connected to a first water inlet pipe 13, and the first water inlet pipe 13 is connected to an external water source.

[0056] Specifically, when flushing is required, clean water is injected into the fixed tube 3 through the first water inlet pipe 13, and the clean water enters the hollow rotating disk 5 through the through hole 4 on the fixed tube 3, and then flows into the membrane filter tube 6 to flush the inside of the membrane filter tube 6.

[0057] Reference Figure 2-Figure 5 In order to further flush the outer wall of the membrane filter tube 6, the flushing structure also includes two closed blocks 22 fixed in the fixed tube 3, and a reciprocating threaded rod 23 is rotatably connected between the two closed blocks 22. The outer wall of the reciprocating threaded rod 23 is threadedly sleeved with a nut block 24, and the nut block 24 is slidably connected to the rectangular groove at the top of the fixed tube 3 through the connecting block. The outer wall of the fixed tube 3 is also slidably sleeved with a liquid storage ring 25, and the top of the liquid storage ring 25 is fixedly connected to the connecting block. The outer wall of the liquid storage ring 25 is fixed with multiple nozzles 26 for spraying clean water. Power and water supply system: One end of the reciprocating threaded rod 23 rotates through one of the closed blocks 22 and extends to the outside of the fixed tube 3, and is connected to the rotating rod 9 through a synchronous wheel and a synchronous belt transmission to achieve synchronous rotation. A third water pump 27 is fixed to the other side of the sewage pool 1 through a frame, and the liquid inlet of the third water pump 27 is connected to the external water source through a hose, and the liquid outlet is connected to the liquid storage ring 25 through a second water inlet pipe 28.

[0058] Specifically, when the third water pump 27 is started, clean water is injected into the liquid storage ring 25 and sprayed outward through the nozzle 26. At the same time, due to the rotation of the rotating rod 9, the reciprocating threaded rod 23 is driven to rotate through the synchronous transmission, and then through the cooperation of the nut block 24 and the connecting block, the liquid storage ring 25 is reciprocated and linearly moved on the fixed pipe 3. In this way, multiple nozzles 26 can perform all-round flushing on the outer wall of the rotating membrane filter tube 6.

[0059] Reference Figure 7-Figure 9 The injection structure includes two injection tubes 30 fixed at the bottom of the medicine storage box 50, and the two injection tubes 30 are respectively connected to the multiple membrane filter tubes 6 in the two treatment pools 2. The bottom end of the injection tube 30 is connected to the fixed tube 3, and the cleaning agent is injected into the hollow rotating disk 5 through the through hole 4. At the bottom of the medicine storage box 50, two rotating plates 31 are also connected to the rotation of the rotating shaft to block the injection tube 30. In each rotating plate 31, a first clearance groove 32 is provided, and a first pin rod 33 is slidably matched in the first clearance groove 32. The same U-shaped frame 34 is fixed at both ends of the first pin rod 33, and the bottom of the U-shaped frame 34 is connected to the two pull rods 35 that are sealed and slidably penetrated through the inner wall of the bottom of the medicine storage box 50 through the pull rod 35. A push plate 36 is fixed to the bottom end of the pull rod 35, and the push plate 36 cooperates with the centrifugal structure at the bottom of the medicine storage box 50, such as the rotating disk 37, the centrifugal block 39, the tension spring 40, etc.

[0060] Specifically, when the rotating rod 9 rotates, the rotating disk 37 is driven to rotate through the transmission mechanism, and the centrifugal block 39 moves outward under the action of centrifugal force, and the tension spring 40 is stretched. The centrifugal block 39 drives the push plate 36 and the pull rod 35 to move downward through the connecting mechanism, and the pull rod 35 drives the rotating plate 31 to rotate through the cooperation of the first pin rod 33 and the first clearance groove 32, thereby releasing the blockage of the injection tube 30. At this time, the output shaft of the multi-stage cylinder 51 pushes the sealing plate 29 to move downward, and the cleaning agent is quickly injected into the fixed tube 3, and enters the hollow rotating disk 5 through the through hole 4, and finally enters the membrane filter tube 6. Due to the rotation of the membrane filter tube 6, the cleaning agent can be evenly distributed in the membrane filter tube 6, and the dirt can be removed comprehensively and effectively.

[0061] Reference Figure 7-Figure 9 The centrifugal structure is specifically designed as follows: a turntable 37 is installed below the medicine storage box 50, and the turntable 37 is rotated by a bearing and other structures. A plurality of equally spaced sliding grooves 38 are processed on one side edge of the turntable 37, and a centrifugal block 39 is slidably installed in each sliding groove 38. One end of the centrifugal block 39 is designed as an inclined surface, which cooperates with the bottom surface of the push plate 36 and is used to push the push plate 36 to move under the action of centrifugal force. A tension spring 40 is fixedly connected to the other side of the centrifugal block 39, and the other end of the tension spring 40 is fixedly connected to the side wall of the sliding groove 38, which is used to pull the centrifugal block 39 back to the initial position when the turntable 37 stops rotating. The central axis of the turntable 37 is fixedly connected to one end of a rotating rod 9 to ensure that when the rotating rod 9 is driven by a motor or other driving device to rotate, it can synchronously drive the turntable 37 to rotate.

[0062] Specifically, when the rotating rod 9 rotates, the rotating disk 37 rotates accordingly, generating centrifugal force to make the centrifugal block 39 slide outward, and the tension spring 40 is stretched. The inclined surface of the centrifugal block 39 pushes the push plate 36 to move downward, and then the pull rod 35 and the first pin 33 in the first clearance groove 32 slide together, driving the rotating plate 31 to rotate around its fixed axis, thereby releasing the blocking state of the rotating plate 31 on the injection tube 30, allowing the medicine to enter the treatment tank 2 through the injection tube 30.

[0063] Reference Fig.10 In an urban sewage treatment plant, in order to achieve effective treatment and reuse of sewage, a second water pump 19 is fixedly installed on a side of the sewage pool 1 away from the three-way pipe 15 through a frame in this embodiment. A second three-way valve 20 is connected to the liquid inlet end of the second water pump 19, and the two liquid inlet ports of the second three-way valve 20 are respectively connected to the two treatment pools 2 through hoses, so as to selectively extract sewage from any treatment pool 2. A third three-way valve 21 is connected to the liquid outlet end of the second water pump 19, and the two liquid outlet ports of the third three-way valve 21 are also connected to the two treatment pools 2 through hoses, so as to discharge the extracted sewage into another treatment pool 2, so as to achieve the circulation treatment and reuse of sewage.

[0064] Reference Figure 6 In order to ensure the stability of the closing plate 16 in the treatment tank 2, a magnet stopper 18 is fixedly installed on the inner wall of one side of the two treatment tanks 2 in this embodiment. At the same time, a layer of iron sheet is fixed on both sides of the closing plate 16, so that when the closing plate 16 is lowered to the bottom of the treatment tank 2, a magnetic attraction is generated between the magnet stopper 18 and the iron sheet, which effectively prevents the closing plate 16 from shaking or shifting under the impact of water flow.

[0065] Example 2: Reference Fig.10 and Fig.11 , improved on the basis of Example 1: In each treatment tank 2, this embodiment is further provided with a set of driving structure for driving the rotation of multiple aeration tubes 43 in the treatment tank 2. Specifically, a gear 45 is fixedly provided on the outer wall of one of the aeration tubes 43, and the multiple aeration tubes 43 are connected by a synchronous wheel and a synchronous belt or a sprocket chain (and the stability of the transmission can be ensured by a tensioning wheel). A push rod 47 is slidably penetrated in the sewage tank 1, and a rack 46 meshing with the gear 45 is fixedly connected to the bottom end of the push rod 47. A second pin rod 49 is fixedly penetrated at the top end of the push rod 47, and the two ends of the second pin rod 49 respectively extend into the second clearance grooves 48 on the two rotating plates 31, and slide in cooperation with the second clearance grooves 48.

[0066] When the second water pump 19 pumps the sewage in one treatment tank 2 to another treatment tank 2, the rotating rod 9 will rotate rapidly, and the rotating plate 31 will be driven to rotate through the centrifugal structure to release the blockage of the injection tube 30. At the same time, the rotating plate 31 drives the push rod 47 and the rack 46 to move up through the cooperation of the second clearance groove 48 and the second pin 49. The meshing action of the rack 46 and the gear 45 causes one of the aeration tubes 43 to start rotating, and through the transmission of the synchronous wheel and the synchronous belt, drives all the aeration tubes 43 to rotate synchronously by about 180°. At this time, the arc baffle 44 installed on the aeration tube 43 will rotate to the aeration hole to close the aeration hole to prevent dirt from entering and clogging the aeration hole as the water level drops during the sewage extraction process. When the water level in the treatment tank 2 drops to below the arc baffle 44, the rotation speed of the rotating rod 9 will slow down, and the membrane filter tube 6 will start to be flushed to ensure the cleanliness and smoothness of the membrane filter tube 6. In summary, the present invention realizes the deep treatment of sewage in the urban sewage treatment plant and the automatic cleaning of the membrane filter tube 6 through the sophisticated structural design, thereby improving the sewage treatment efficiency and the stability of the equipment operation.

[0067] The method for using the MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant comprises the following steps:

[0068] S1. During sewage treatment, the precipitated sewage is injected into one of the treatment tanks 2 through the three-way pipe 15, and the sewage enters the hollow rotating disk 5 after being filtered by the membrane filter tube 6. Then, the treated sewage in the hollow rotating disk 5 is pumped out to the outside under the cooperation of the first water pump 12 and the first three-way valve 11. During sewage treatment, air is injected into the aeration pipe 43 through the blower, the air injection pipe 42 and the transfer pipe 41, and air is injected into the treatment tank 2 through the aeration pipe 43 for sewage treatment;

[0069] S2. When the membrane filter tube 6 needs to be cleaned, the treatment pool 2 in use needs to be closed, and another treatment pool 2 needs to be opened, and then the remaining sewage in the treatment pool 2 is pumped into the other treatment pool 2; specifically, the rotating rod 9 above the cleaning membrane filter tube 6 is driven by a motor, and the rotating rod 9 drives the hollow rotating disk 5 and the membrane filter tube 6 to rotate through the friction between the second rubber wheel 10 and the hollow rotating disk 5, and the hollow rotating disk 5 drives the push plate 14 to rotate, and the push plate 14 cooperates with the inclined surface of the trapezoidal block 17 to drive the trapezoidal block 17 and the closing plate 16 to move. The closing plate 16 can just block one of the liquid inlet ends of the three-way pipe 15 at this time, and the magnet stopper 18 and the closing plate 16 generate magnetic attraction to ensure the stability of the closing plate 16 blocking one end of the magnet stopper 18. In addition, the second water pump 19 cooperates with the second three-way valve 20 and the third three-way valve 21 to discharge the sewage in the previously used treatment pool 2 into the treatment pool 2 in use, so that the normal operation of the sewage treatment can be ensured when the membrane filter tube 6 is cleaned in the later stage, and the sewage in the corresponding treatment pool 2 is discharged, which is convenient for the later cleaning of the membrane filter tube 6;

[0070] S3. When cleaning, first inject the corresponding cleaning agent into the membrane filter tube 6 to remove the dirt attached to the outer wall of the membrane filter tube 6; in specific operation, the rotating rod 9 drives the turntable 37 to rotate when rotating, and the centrifugal block 39 moves outward under the action of centrifugal force, and the tension spring 40 is stretched, and the centrifugal block 39 drives the push plate 36 and the pull rod 35 to move downward, and the pull rod 35 drives the rotating plate 31 to rotate through the cooperation of the first pin rod 33 and the first give way groove 32, and releases the blocking of the rotating plate 31 on the injection tube 30, and the output shaft of the multi-stage cylinder 51 pushes the sealing plate 29 to move downward, which is used The cleaning agent is quickly injected into the fixed tube 3 through the injection tube 30, and enters the corresponding hollow rotating disk 5 through the through hole 4, and then enters the membrane filter tube 6 through the hollow rotating disk 5. Since the second rubber wheel 10 drives the hollow rotating disk 5 to rotate, the hollow rotating disk 5 drives the multiple membrane filter tubes 6 to rotate, and the two adjacent membrane filter tubes 6 are connected by the first rubber wheel 7. Therefore, under the action of the arc plate 8, the multiple membrane filter tubes 6 can be driven to rotate. At this time, the cleaning agent in the membrane filter tube 6 can be evenly distributed in the membrane filter tube 6, and the dirt can be fully and effectively removed;

[0071] S4, after the cleaning agent is removed, the rotating rod 9 starts to rotate slowly, the injection tube 30 is closed again, and clean water is injected into the hollow rotating disk 5 and the membrane filter tube 6 for flushing to prevent residual cleaning agent in the hollow rotating disk 5 and the membrane filter tube 6; in specific operation, the rotating rod 9 rotates slowly, the centrifugal force of the centrifugal block 39 becomes smaller, and the centrifugal block 39 moves to the middle under the tension of the tension spring 40, and the rotating plate 31 rotates in the opposite direction to reset and close the injection tube 30 again, and clean water is injected into the fixed tube 3 through the cooperation of the first water inlet pipe 13 and the first three-way valve 11, and the clean water passes through the fixed tube 3. After being injected into the corresponding hollow rotating disk 5 through the through hole 4, it enters the membrane filter tube 6, and then the inside of the membrane filter tube 6 is flushed. At the same time, the third water pump 27 cooperates with the second water inlet pipe 28 to inject clean water into the liquid storage ring 25, and the clean water is sprayed outward through the nozzle 26. The reciprocating threaded rod 23 drives the liquid storage ring 25 to move reciprocatingly through the nut block 24. Multiple nozzles 26 flush the outer wall of the rotating membrane filter tube 6. The combination of inside and outside can fully complete the flushing operation of the membrane filter tube 6, avoiding residual cleaning agents in the membrane filter tube 6, which affects the later sewage treatment effect;

[0072] S5. When cleaning the membrane filter tube 6 in the corresponding treatment tank 2, it is necessary to protect the aeration tube 43 inside it to prevent the dirt in the treatment tank 2 from clogging the aeration holes. In specific operation, when the second water pump 19 pumps the sewage in one of the treatment tanks 2 into another treatment tank 2, the rotating rod 9 rotates quickly to drive the rotating plate 31 to rotate to release the blockage of the injection tube 30. At this time, the rotating plate 31 drives the rack 46 to move upward through the cooperation of the second yield groove 48 and the second pin rod 49. The rack 46 drives one of the aeration tubes 43 to rotate through the gear 45, and multiple aeration tubes 43 are connected by synchronous wheels and synchronous belts. Therefore, the aeration tube 43 rotates 180°, and the arc baffle 44 closes the aeration holes of the aeration tube 43 to prevent dirt from blocking the aeration holes as the water level decreases during the sewage extraction process. When the water level is lower than the arc baffle 44, the rotating rod 9 rotates slowly to flush the membrane filter tube 6.

[0073] However, as is well known to those skilled in the art, the working principles and wiring methods of the second water pump 19, the first water pump 12 and the third water pump 27 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0074] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. MBR membrane bioreactor for deep sewage treatment in urban sewage treatment plants, characterized by: The invention comprises a sewage pool (1), wherein two treatment pools (2) are arranged in the sewage pool (1), a fixed pipe (3) is fixed in each of the two treatment pools (2), two hollow rotating disks (5) are rotatably sleeved on the outer walls of the two fixed pipes (3), a plurality of membrane filter tubes (6) are rotatably connected between the two hollow rotating disks (5) located in the same treatment pool (2), and the two treatment pools (2) and the plurality of membrane filter tubes (6) cooperate to alternately complete the treatment of sewage; The outer wall of the fixed tube (3) is provided with a plurality of through holes (4), and the hollow rotating disk (5) is connected to the fixed tube (3) through the plurality of through holes (4); It also comprises a medicine storage box (50) fixed on the top of the sewage pool (1), a multi-stage cylinder (51) fixed on the top of the medicine storage box (50), an output shaft of the multi-stage cylinder (51) extending into the medicine storage box (50) and fixed with a sealing plate (29), and the sealing plate (29) slidingly seals in the medicine storage box (50) for injecting cleaning agents into a plurality of membrane filter tubes (6) in the two treatment pools (2); It also includes a three-way pipe (15) fixed on one side of the sewage pool (1), and the liquid inlet end of the three-way pipe (15) is connected to the external sewage sedimentation tank, and the two liquid outlet ends of the three-way pipe (15) are respectively connected to the two treatment pools (2), and the inner wall of one side of the two treatment pools (2) is slidably connected to the same closing plate (16) for alternately blocking the two liquid outlet ends of the three-way pipe (15); Wherein, a transfer pipe (41) is fixed to the inner wall of the two treatment pools (2) on the side away from each other, and is used to inject air into the treatment pools (2); A control structure, arranged on one side of the closing plate (16), for controlling the movement of the closing plate (16); an aeration structure, arranged in the treatment tank (2) and used for injecting air into the treatment tank (2); A medicine injection structure, arranged in the medicine storage box (50), is used to inject a cleaning agent into the membrane filter tube (6) to remove dirt attached to the outer wall of the membrane filter tube (6); The flushing structure is arranged in the treatment tank (2) and is used to clean the residual cleaning agent on the membrane filter tube (6).

2. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 1, characterized in that: The control structure comprises two trapezoidal blocks (17) fixed on one side of the closing plate (16), and the two trapezoidal blocks (17) are respectively located in two treatment tanks (2), and a plurality of push plates (14) are fixed on one side of two hollow rotating disks (5) close to each other, and the trapezoidal blocks (17) cooperate with adjacent push plates (14).

3. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 1, characterized in that: The aeration structure comprises a plurality of aeration pipes (43) rotatably mounted on the inner wall of one side of the treatment tank (2), one end of each of the plurality of aeration pipes (43) being rotatably connected to a transfer pipe (41), and the aeration pipes (43) being communicated with the transfer pipe (41), an air injection pipe (42) being fixedly mounted on one side of the transfer pipe (41), one end of the air injection pipe (42) being fixedly extended to one side of the sewage tank (1) and being communicated with an external blower, a plurality of arc-shaped baffles (44) being fixedly mounted on the inner wall of the bottom of the treatment tank (2) via pillars, and the aeration pipes (43) being rotatably mounted in the arc-shaped baffles (44) for supporting the aeration pipes (43).

4. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 1, characterized in that: The flushing structure comprises a rotating rod (9) which is rotated on the top of the sewage pool (1) through a base, the outer wall of the rotating rod (9) is fixedly sleeved with two second rubber wheels (10), and the two second rubber wheels (10) respectively cooperate with two hollow rotating disks (5) to drive the hollow rotating disks (5) to rotate, the outer walls of the plurality of membrane filter tubes (6) are fixedly sleeved with two first rubber wheels (7), two adjacent first rubber wheels (7) located on the same side touch each other, and the two first rubber wheels (7) are transmission-connected, and the inner wall of the treatment pool (2) on the side away from each other is fixedly provided with an arc plate (8), and the arc plate (8) touches the first rubber wheel (7), and the arc plate (8) and the first rubber wheel (7) are connected. The friction force between the two drives the first rubber wheel (7) to rotate. A first water pump (12) is fixed to one side of the sewage pool (1) through a frame. One end of the fixed pipe (3) is fixedly passed through the inner wall of one side of the sewage pool (1) and extends to one side of the sewage pool (1). A first three-way valve (11) is fixed to the bottom of the fixed pipe (3) through a hose. One of the ports of the first three-way valve (11) is connected to the first water pump (12) and is used to extract water treated by the membrane filter tube (6). A first water inlet pipe (13) is fixed to the other port of the first three-way valve (11). The first water inlet pipe (13) is connected to an external water source and is used to inject clean water into the hollow rotating disk (5) and the membrane filter tube (6).

5. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 4, characterized in that: The flushing structure also includes two closing blocks (22) fixed in the fixed tube (3), a reciprocating threaded rod (23) is rotatably connected between the two closing blocks (22), a nut block (24) is threadedly sleeved on the outer wall of the reciprocating threaded rod (23), a rectangular groove is provided on the top of the fixed tube (3), a connecting block fixedly connected to the nut block (24) is slidably connected in the rectangular groove, a liquid storage ring (25) is slidably sleeved on the outer wall of the fixed tube (3), the top of the connecting block is fixedly connected to the inner wall of the top of the liquid storage ring (25), and a plurality of nozzles (26) are fixed on the outer wall of the liquid storage ring (25) for flushing the outer wall of the rotating medium membrane filter tube (6) One end of the reciprocating threaded rod (23) rotates to penetrate one of the closed blocks (22) and extends to one side of the fixed pipe (3); the reciprocating threaded rod (23) and the rotating rod (9) are connected by a synchronous wheel and a synchronous belt transmission, and are used to drive the liquid storage ring (25) to reciprocate; a third water pump (27) is fixed to one side of the sewage pool (1) through a frame; the liquid inlet of the third water pump (27) is connected to an external water source through a hose; a second water inlet pipe (28) is fixed to the liquid outlet of the third water pump (27); the second water inlet pipe (28) is fixed to penetrate the closed block (22) and is connected to the liquid storage ring (25), and is used to provide clean water to the nozzle (26).

6. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 1, characterized in that: The drug injection structure comprises two drug injection tubes (30) fixed at the bottom of the drug storage box (50), and the two drug injection tubes (30) are respectively used to provide cleaning agents to a plurality of membrane filter tubes (6) in two treatment pools (2), the bottom ends of the drug injection tubes (30) are connected to the fixed tube (3), and the drug injection tubes (30) cooperate with the through holes (4) to inject cleaning agents into the corresponding hollow rotating disks (5), the bottom inner wall of the drug storage box (50) is rotatably connected to two rotating plates (31) via a rotating shaft, and the two rotating plates (31) are respectively used to block the two drug injection tubes (30), and the two rotating plates (31) are both provided with first clearance grooves (32), the first two give way grooves (32) are both slidably fitted with first pin rods (33), the two ends of the first pin rods (33) are fixed with the same U-shaped frame (34), the bottom inner wall of the medicine storage box (50) is sealed and slidably penetrated by two pull rods (35), the top ends of the two pull rods (35) are respectively fixedly connected to the bottom of the corresponding U-shaped frame (34), the bottom ends of the two pull rods (35) are both fixed with push plates (36), the bottom of the medicine storage box (50) is provided with two centrifugal structures, the push plates (36) cooperate with the centrifugal structures to drive the rotating plate (31) to rotate to complete the opening and closing of the injection tube (30).

7. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 6, characterized in that: The centrifugal structure includes a turntable (37) rotating below the medicine storage box (50), a plurality of sliding grooves (38) are provided on one side of the turntable (37), a plurality of sliding grooves (38) are slidably connected with centrifugal blocks (39), and the centrifugal blocks (39) cooperate with the push plate (36) to drive the push plate (36) to move, a tension spring (40) is fixed on one side of the plurality of centrifugal blocks (39), and the ends of the plurality of tension springs (40) close to each other are respectively fixedly connected to the inner wall of one side of the corresponding sliding groove (38), and the other side of the turntable (37) is fixedly connected to one end of an adjacent rotating rod (9).

8. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 1, characterized in that: A second water pump (19) is fixed to a side of the sewage pool (1) away from the three-way pipe (15) through a frame, a second three-way valve (20) is fixed to a liquid inlet end of the second water pump (19), and both liquid inlet ports of the second three-way valve (20) are connected to the two treatment pools (2) through a hose, and a third three-way valve (21) is fixed to a liquid outlet end of the second water pump (19), and both liquid outlet ports of the third three-way valve (21) are connected to the two treatment pools (2) through a hose.

9. The MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 8, characterized in that: A magnet block (18) is fixed to the inner wall of one side of the two treatment pools (2), and iron sheets are fixed to both sides of the closing plate (16), and a magnetic attraction force is generated between the magnet block (18) and the iron sheets to control the stability of the closing plate (16).

10. The method for using the MBR membrane bioreactor for deep sewage treatment in a municipal sewage treatment plant according to claim 9, characterized in that: A driving structure is provided in each of the two treatment tanks (2), and the driving structure is used to drive the plurality of aeration pipes (43) in the treatment tank (2) to rotate; The driving structure comprises a gear (45) rotating in the treatment tank (2), and the gear (45) is fixedly sleeved on the outer wall of one of the aeration tubes (43), and the outer walls of the plurality of aeration tubes (43) are connected by synchronous wheels and synchronous belt transmission. A push rod (47) is slidably penetrated in the sewage tank (1), and a rack (46) is fixed at the bottom end of the push rod (47), and the rack (46) is meshed with the gear (45) for driving the aeration tube (43) to rotate. A second pin rod (49) is fixedly penetrated at the top end of the push rod (47), and a second clearance groove (48) is provided on the inner wall of the rotating plate (31) away from each other, and the two ends of the second pin rod (49) respectively extend into the two second clearance grooves (48), and the second pin rod (49) is slidably matched with the second clearance groove (48).

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