CN210286890U

CN210286890U - MBR membrane module with mediation function

Info

Publication number: CN210286890U
Application number: CN201920662059.5U
Authority: CN
Inventors: 何正新; 李凯; 庄伟华; 花徐敏
Original assignee: Jiangsu Yuanneng Environment Engineering Co ltd
Current assignee: Jiangsu Yuanneng Environment Engineering Co ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-04-10
Anticipated expiration: 2029-05-09

Abstract

The utility model relates to an MBR membrane component with dredging function, which comprises an aerator, a round pipe, an aeration pipe, a water outlet pipe, two purification mechanisms and two supporting rods, wherein each purification mechanism comprises a purification pipe, a connecting pipe, a supporting net, an MBR membrane and a driving component, a first cross rod and a spring are arranged in the purification pipe, the driving component comprises a gas collecting box and two limiting units, each limiting unit comprises a sliding rod and a sliding ring, the MBR membrane component with the dredging function filters sewage through the MBR membrane in the purification mechanism, and shakes off impurities on the surface through the gas collecting box, the compression spring and the spring action connecting pipe in the driving component, so that the MBR membrane vibrates, the dredging of the MBR membrane is realized, the sewage treatment efficiency is improved, the cleaning period is prolonged, the maintenance cost is saved, and bubbles generated by aeration are used as a power source for compressing the spring and driving the MBR membrane to vibrate, the electricity is saved, and therefore the practicability of the equipment is improved.

Description

MBR membrane module with mediation function

Technical Field

The utility model relates to a water treatment facilities field, in particular to MBR membrane module with mediation function.

Background

In the fields of sewage treatment and water resource recycling, MBR (Membrane bioreactor) is a novel water treatment technology combining a Membrane separation unit and a biological treatment unit. According to the structure of the membrane, the membrane can be divided into a flat membrane, a tubular membrane, a hollow fiber membrane and the like, and according to the membrane aperture, the membrane can be divided into a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and the like. In the practical application process, people often utilize MBR membranes to purify sewage.

But current MBR membrane water treatment facilities is in the use, and the particle impurity of aquatic piles up the surface of MBR membrane along with rivers easily, and long-time operation back leads to the fenestra blockage of MBR membrane, is unfavorable for the circulation of water, has reduced sewage treatment efficiency to lead to current MBR membrane water treatment facilities practicality to reduce.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome the defects of the prior art, the MBR membrane module with the dredging function is provided.

The utility model provides a technical scheme that its technical problem adopted is: an MBR membrane module with a dredging function comprises an aerator, a round pipe, an aerator pipe, a water outlet pipe, two purification mechanisms and two supporting rods, wherein two ends of the aerator pipe are respectively fixed below the water outlet pipe through the two supporting rods;

the purification mechanism comprises a purification pipe, a connecting pipe, a support net, an MBR membrane and a driving component, the top end of the purification pipe is communicated with a water outlet pipe, the periphery of the top end of the connecting pipe is hermetically connected with the inner wall of the bottom end of the purifying pipe, the MBR membrane and the supporting net are both tubular, the inner diameter of the supporting net is the same as that of the connecting pipe, the top end of the supporting net is fixed at the bottom end of the connecting pipe, the MBR membrane is fixed on the periphery of the support net, the driving component is positioned below the MBR membrane, a first cross bar and a spring are arranged in the purifying tube, two ends of the first cross bar are fixed on the inner wall of the purifying tube, a second cross bar is arranged in the connecting pipe, two ends of the second cross bar are fixed on the inner wall of the purifying pipe, two ends of the spring are respectively connected with the center of the first cross rod and the center of the second cross rod, and the spring is in a stretching state;

drive assembly includes gas collection box and two spacing units, the shape of gas collection box is the cuboid, the gas collection box is located between two spacing units, the opening of gas collection box sets up downwards, spacing unit includes slide bar and sliding ring, sliding ring and gas collection box fixed connection, the sliding ring cover is established on the slide bar, one side that is close to the slide bar on the upper portion of gas collection box is equipped with the unit of disappointing.

As preferred, in order to facilitate the deflation after the gas collection box rises, the gas release unit comprises a gas release port, a sealing plate, a driving rod, a roller and a fixing rod, the gas release port is arranged on the inner wall of the gas collection box, the manufacturing material of the gas collection box is iron, the manufacturing material of the sealing plate is a magnet, the sealing plate is positioned inside the gas collection box, the sealing plate and the gas release port are both circular, the diameter of the sealing plate is larger than the inner diameter of the gas release port, the sealing plate and the gas release port are coaxially arranged, one end of the driving rod is vertically fixed on one side of the sealing plate close to the sliding rod, the roller is fixed at the other end of the driving rod, the fixing rod is fixed on one side of the end of the sliding rod far away from the aeration pipe close to the gas release port, the distance between one end of the fixing, the distance between one end of the fixed rod, which is far away from the sliding rod, and the gas collection box is smaller than the maximum distance between the roller and the gas collection box.

As preferred, in order to guarantee the leakproofness of disappointing the mouth, the one side of disappointing the mouth of closing plate is equipped with the sealing washer, sealing washer and the coaxial setting of closing plate, the shape of sealing washer is circular cone cylindricality, the biggest external diameter of sealing washer is greater than the internal diameter of disappointing the mouth, the minimum external diameter of sealing washer is less than the internal diameter of disappointing the mouth, the external diameter of the one end of keeping away from the closing plate of sealing washer is less than the external diameter of the other end of sealing washer.

As preferred, coaxial with the mouth of disappointing all the time for fixed seal plate, be equipped with solid fixed ring and a plurality of side lever in the mouth of disappointing, gu fixed ring overlaps and establishes on the actuating lever, side lever circumference evenly distributed is in solid fixed ring's periphery, gu fixed ring passes through side lever and the inner wall sealing connection of mouthful.

Preferably, in order to limit the position between the connecting pipe and the purifying pipe, a sealing ring and a plurality of pull wires are arranged on the periphery of the bottom end of the connecting pipe, the periphery of the connecting pipe is fixed on the inner wall of the sealing ring, the pull wires are uniformly distributed above the sealing ring in the circumferential direction, the sealing ring is fixedly connected with the water outlet pipe through the pull wires, and the pull wires are in a tightened state.

Preferably, in order to ensure the aeration amount, one end of the gas collecting box close to the aeration pipe is in a rectangular pyramid column shape, and the size of the end of the gas collecting box close to the aeration pipe is smaller than that of the other end of the gas collecting box.

The beneficial effects of the utility model are that, this MBR membrane module with mediation function carries out filtration treatment to sewage through the MBR membrane in the purification mechanism, and through the gas collection box gas collection among the drive assembly, support MBR membrane rebound, compression spring makes the MBR membrane lose the support after disappointing the rebound by the gas collection box again, the spring action connecting pipe, make MBR membrane vibration, shake off the impurity on surface, realize the mediation to the MBR membrane, improve sewage treatment efficiency, the extension cleaning cycle, practice thrift the maintenance cost, and utilize the bubble that the aeration produced as the power supply of compression spring and drive MBR membrane vibration, the power saving consumption, thereby the practicality of equipment has been improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an MBR membrane module with a dredging function according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of section C of FIG. 1;

in the figure: 1. the device comprises an aerator, a circular tube 2, an aerator tube 3, an aerator tube 4, a water outlet tube 5, a pull wire, a support rod 6, an aerator head 7, a purification tube 8, a connecting tube 9, a support net 10, an MBR membrane 11, a first cross rod 12, a spring 13, a second cross rod 14, a gas collection box 15, a slide rod 16, a slide ring 17, a slide ring 18, a sealing plate 19, a driving rod 20, a roller 21, a fixing rod, a sealing ring 22, a fixing ring 23, a side rod 24 and a sealing ring 25.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, an MBR membrane module with a dredging function includes an aerator 1, a circular tube 2, an aerator tube 3, a water outlet pipe 4, two purification mechanisms and two support rods 6, wherein two ends of the aerator tube 3 are respectively fixed below the water outlet pipe 4 through the two support rods 6, the aerator 1 is fixed below the water outlet pipe 4, the top end and the bottom end of the circular tube 2 are respectively communicated with the centers of the aerator 1 and the aerator tube 3, one side of the aerator tube 3 close to the water outlet pipe 4 is uniformly provided with a plurality of aeration heads 7, and the two purification mechanisms are symmetrically arranged about the circular tube 2;

when using this equipment to carry out sewage treatment, place equipment in the effluent water sump, make aeration pipe 3 be located the bottom back in the sewage treatment pond, aeration machine 1 starts, through introducing outside air, compress, cut into a large amount of micro-bubbles, the bubble passes through in pipe 2 gets into aeration pipe 3, then upwards flow from aeration head 7, the micro-bubble drives the impurity of aquatic and upwards floats to the liquid level, when realizing solid-liquid separation, sewage carries out purification treatment through two purification mechanism, from the clean rivers of outlet pipe 4 discharge.

As shown in fig. 2-3, the purification mechanism includes a purification tube 8, a connection tube 9, a support net 10, an MBR membrane 11 and a driving assembly, the top end of the purification tube 8 is communicated with the water outlet tube 4, the outer periphery of the top end of the connection tube 9 is hermetically connected with the inner wall of the bottom end of the purification tube 8, the MBR membrane 11 and the support net 10 are both tubular, the inner diameter of the support net 10 is the same as the inner diameter of the connection tube 9, the top end of the support net 10 is fixed at the bottom end of the connection tube 9, the MBR membrane 11 is fixed at the outer periphery of the support net 10, the driving assembly is located below the MBR membrane 11, a first cross bar 12 and a spring 13 are arranged in the purification tube 8, two ends of the first cross bar 12 are fixed on the inner wall of the purification tube 8, a second cross bar 14 is arranged in the connection tube 9, two ends of the second cross bar 14 are fixed on the inner wall of the purification tube 8, two ends of the spring 13 are, the spring 13 is in a stretched state;

drive assembly includes gas collection box 15 and two spacing units, gas collection box 15's shape is the cuboid, gas collection box 15 is located between two spacing units, gas collection box 15's opening sets up downwards, spacing unit includes slide bar 16 and sliding ring 17, sliding ring 17 and gas collection box 15 fixed connection, sliding ring 17 cover is established on slide bar 16, one side that is close to slide bar 16 on the upper portion of gas collection box 15 is equipped with the unit of losing heart.

In the purification mechanism, utilize the fixed MBR membrane 11's of pipy supporting network 10 shape, MBR membrane 11 stretches into in the sewage, connecting pipe 9 and supporting network 10 fixed connection, and connecting pipe 9 can slide from top to bottom along the inner wall of purge tube 8, the inside of purge tube 8, spring 13 through stretching state produces the pulling force to second horizontal pole 14, thereby make the top of connecting pipe 9 be located the bottom in purge tube 8, MBR membrane 11 stretches into aquatic, when debris in the sewage got into the inboard from MBR membrane 11's the outside, filter through MBR membrane 11, make sewage after the processing flow upwards through connecting pipe 9 and get into in purge tube 8, discharge from outlet pipe 4 again. Because MBR carries out the easy jam of the epimembranal hole on purification unit surface, influence the circulation of water, consequently, when carrying out purification treatment, drive MBR membrane 11 rebound through drive assembly, make connecting pipe 9 drive the horizontal pipe rebound of second, make spring 13 change into the compression state by original tensile state, then drive assembly loses the support to MBR membrane 11, the spring 13 of compression is for resumeing the deformation, promote connecting pipe 9 rebound, thereby make connecting pipe 9, supporting network 10 and MBR membrane 11 restore under the effect of deformation at spring 13, vibrate from top to bottom, MBR membrane 11 shakes the debris on surface in the process of shake, make MBR membrane 11 resume the mediation, the circulation of the sewage of being convenient for, the cleaning cycle of MBR membrane 11 has been prolonged, and the maintenance cost is saved, thereby the practicality of equipment has been improved. In the driving assembly, the gas collecting box 15 with a downward opening is used for collecting micro bubbles emitted by the aeration head 7, the bubbles are accumulated in the gas collecting box 15, the size of the bubbles is increased, upward buoyancy is generated on the gas collecting box 15, the gas collecting box 15 is supported to move upwards, two sides of the gas collecting box 15 move on a slide bar 16 through a slide ring 17, the lifting direction of the gas collecting box 15 is fixed, the gas collecting box 15 moves upwards, a support MBR membrane 11 moves upwards, a spring 13 is compressed, after the gas collecting box 15 rises to a certain height, the spring 13 is compressed, an air discharging unit is started, the bubbles in the gas collecting box 15 are discharged through the air discharging unit, the gas collecting box 15 loses the support buoyancy of the bubbles, the gas collecting box 15 moves downwards, the air discharging unit does not perform air discharging, at the moment, the compressed spring 13 in the purification pipe 8 recovers deformation, and pushes the connecting pipe 9 and the MBR membrane 11 to vibrate up and down, shake off the debris on MBR membrane 11 surface, realize the mediation to MBR membrane 11, equipment continues to move a terminal time after, the bubble that aeration head 7 produced in gas collection box 15, upward movement, thereby upwards jack-up MBR membrane 11, the unit loses heart through disappointing again, so circulate, realize the periodic vibration of MBR membrane 11, shake off the filth on MBR membrane 11 surface, be convenient for realize the mediation of MBR membrane 11, improve sewage treatment efficiency, simultaneously because the bubble that utilizes aeration head 7 to produce is gathered in gas collection box 15, make gas collection box 15 float upwards, compression spring 13, drive MBR membrane 11 through the deformation of spring 13 vibrates from top to bottom, need not to drive MRB membrane vibration with the help of external power equipment, thereby the power consumption cost has been reduced, the practicality of this water treatment equipment has further been improved.

As shown in fig. 4, the air-release unit includes an air-release opening, a sealing plate 18, a driving rod 19, a roller 20 and a fixing rod 21, the air-release opening is disposed on the inner wall of the gas-collecting box 15, the manufacturing material of the gas-collecting box 15 is iron, the manufacturing material of the sealing plate 18 is magnet, the sealing plate 18 is located inside the gas-collecting box 15, the shapes of the sealing plate 18 and the air-release opening are both circular, the diameter of the sealing plate 18 is greater than the inner diameter of the air-release opening, the sealing plate 18 and the air-release opening are coaxially disposed, one end of the driving rod 19 is perpendicularly fixed on one side of the sealing plate 18 close to the sliding rod 16, the roller 20 is fixed at the other end of the driving rod 19, the fixing rod 21 is fixed on one side of the sliding rod 16 close to the air-release opening, the distance between one end of the fixing rod 21 far away, the distance between one end of the fixing rod 21 far away from the sliding rod 16 and the gas collecting box 15 is smaller than the maximum distance between the roller 20 and the gas collecting box 15.

The gas collecting box 15 is made of iron, the sealing plate 18 is made of a magnet, the sealing plate 18 is attached to the inner wall of the gas collecting box 15 to block a gas release port, gas leakage when the gas collecting box 15 collects bubbles is prevented, buoyancy force borne by the gas collecting box 15 is gradually increased along with increase of micro bubbles collected in the gas collecting box 15 and floats upwards, the height of the driving rod 19 is increased, after the roller 20 on the driving rod 19 contacts the fixing rod 21, the fixing rod 21 acts on the roller 20 to press the roller 20, the roller 20 moves towards the gas release port, the driving rod 19 pushes the sealing plate 18, the gas release port is opened, bubbles accumulated in the gas collecting box 15 are conveniently discharged from the gas release port, bubble supporting force borne by the gas collecting box 15 is rapidly reduced, the gas collecting box 15 moves downwards due to compression of the spring 13 to recovery deformation at the moment, the roller 20 does not contact with the fixing rod 21 any more at the moment, the gas collection box 15 generates attraction force for the sealing plate 18, so that the sealing plate 18 is adsorbed on the inner wall of the gas collection box 15, the air leakage opening is sealed, the aeration head 7 generates bubbles, the gas collection box 15 continues to collect gas, and the gas collection box 15 is convenient to move up and down periodically.

As preferred, in order to guarantee the leakproofness of disappointing the mouth, the one side of being close to the disappointing mouth of sealing plate 18 is equipped with sealing washer 22, sealing washer 22 and the coaxial setting of sealing plate 18, sealing washer 22's shape is the circular cone cylindricality, sealing washer 22's the biggest external diameter is greater than the internal diameter of disappointing the mouth, sealing washer 22's minimum external diameter is less than the internal diameter of disappointing the mouth, the external diameter of the one end of keeping away from sealing plate 18 of sealing washer 22 is less than the external diameter of the other end of sealing. The sealing ring 25 is used for filling the gap at the inner wall of the air leakage opening, so that the air bubbles are prevented from flowing out of the air leakage opening when air collection is carried out.

Preferably, in order to fix the sealing plate 18 to be coaxial with the air release opening all the time, a fixing ring 23 and a plurality of side rods 24 are arranged in the air release opening, the fixing ring 23 is sleeved on the driving rod 19, the side rods 24 are circumferentially and uniformly distributed on the periphery of the fixing ring 23, and the fixing ring 23 is connected with the inner wall of the air release opening in a sealing mode through the side rods 24. The position of the fixing ring 23 is fixed through the side rod 24, and the fixing ring 23 is sleeved on the driving rod 19, so that the moving direction of the driving rod 19 is fixed, and the sealing plate 18 moves along the axis of the air leakage port all the time when moving horizontally.

Preferably, in order to limit the position between the connection pipe 9 and the purification pipe 8, a sealing ring 25 and a plurality of pull wires 5 are arranged on the periphery of the bottom end of the connection pipe 9, the periphery of the connection pipe 9 is fixed on the inner wall of the sealing ring 25, the pull wires 5 are circumferentially and uniformly distributed above the sealing ring 25, the sealing ring 25 is fixedly connected with the water outlet pipe 4 through the pull wires 5, and the pull wires 5 are in a tightened state. The sealing ring 25 is pulled by the tightened wire 5, thereby limiting the lowest position of the sealing ring 25 and preventing the connection pipe 9 from moving too far away from the purification pipe 8 when the spring 13 acts on the second rail 14.

Preferably, in order to ensure the aeration amount, one end of the gas collecting box 15 close to the aeration pipe 3 is in the shape of a rectangular pyramid cylinder, and the size of one end of the gas collecting box 15 close to the aeration pipe 3 is smaller than that of the other end of the gas collecting box 15. By reducing the size of the end of the gas collecting box 15 close to the aerator pipe 3, the aeration pipe 3 is convenient for the effused micro-bubbles of the enough aerator head 7 to enter the sewage, the sewage is aerated and purified, and the bubbles effused by a small part of the aerator head 7 enter the gas collecting box 15 to support the gas collecting box 15 to move upwards.

The water treatment equipment operates, sewage is filtered by the MBR membrane 11, meanwhile, the air collecting box 15 is used for collecting micro bubbles emitted by the aeration head 7, the bubbles are accumulated to increase the buoyancy of the air collecting box 15, the air collecting box 15 moves upwards to support the MBR membrane 11 and drive the MBR membrane 11 to move upwards, after a spring 13 in the purifying pipe 8 is changed from a stretching state to a compressing state, a roller 20 on a driving rod 19 in an air leakage unit acts on a fixed rod 21 to push a sealing plate 18 to move so as to open an air leakage opening, the bubbles collected by the air collecting box 15 are discharged from the air leakage opening, the air collecting box 15 loses the support of the bubbles and then moves downwards, the compressed spring 13 acts on a second cross rod 14, the connecting pipe 9 drives a support net 10 and the MBR membrane 11 to vibrate up and down, impurities on the surface of the MBR membrane 11 are shaken off, so that the MBR membrane 11 is kept dredged and the sewage treatment efficiency, prolong 11 cleaning cycle of MBR membrane, practice thrift the maintenance cost, simultaneously on the inner wall of gas collection box 15 is adsorbed to closing plate 18 in the disappointing unit after gas collection box 15 downstream, be convenient for collect gas once more, make things convenient for gas collection box 15 to float upward after collecting sufficient bubble and support MBR membrane 11 rebound, so circulate, realized the automatic mediation to MBR periodicity, improve sewage treatment efficiency, utilize the bubble drive gas collection box 15 rebound that the aeration produced simultaneously, make spring 13 drive MBR membrane 11 vibration after compressing, need not to drive MBR membrane 11 vibration with the help of outside power equipment, the power saving, thereby the practicality of equipment has been improved.

Compared with the prior art, this MBR membrane module with mediation function carries out filtration treatment through MBR membrane 11 in the purification mechanism to sewage, and through the 15 gas collections of gas collection box in the drive assembly, support MBR membrane 11 rebound, compression spring 13, make MBR membrane 11 lose the support after disappointing the rebound by gas collection box 15 again, spring 13 effect connecting pipe 9, make MBR membrane 11 vibrate, shake off the impurity on surface, realize the mediation to MBR membrane 11, improve sewage treatment efficiency, prolong the cleaning cycle, practice thrift the maintenance cost, and utilize the bubble that the aeration produced as the power supply of compression spring 13 and drive MBR membrane 11 vibration, the power saving, thereby the practicality of equipment has been improved.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The MBR membrane module with the dredging function is characterized by comprising an aerator (1), a round pipe (2), an aerator pipe (3), a water outlet pipe (4), two purification mechanisms and two support rods (6), wherein two ends of the aerator pipe (3) are respectively fixed below the water outlet pipe (4) through the two support rods (6), the aerator (1) is fixed below the water outlet pipe (4), the top end and the bottom end of the round pipe (2) are respectively communicated with the centers of the aerator (1) and the aerator pipe (3), one side of the aerator pipe (3) close to the water outlet pipe (4) is uniformly provided with a plurality of aeration heads (7), and the two purification mechanisms are symmetrically arranged relative to the round pipe (2);

the purification mechanism comprises a purification pipe (8), a connecting pipe (9), a support net (10), an MBR membrane (11) and a driving component, wherein the top end of the purification pipe (8) is communicated with a water outlet pipe (4), the periphery of the top end of the connecting pipe (9) is hermetically connected with the inner wall of the bottom end of the purification pipe (8), the MBR membrane (11) and the support net (10) are both in a tubular shape, the inner diameter of the support net (10) is the same as that of the connecting pipe (9), the top end of the support net (10) is fixed at the bottom end of the connecting pipe (9), the MBR membrane (11) is fixed at the periphery of the support net (10), the driving component is positioned below the MBR membrane (11), a first transverse rod (12) and a spring (13) are arranged in the purification pipe (8), two ends of the first transverse rod (12) are fixed on the inner wall of the purification pipe (8), a second transverse rod (14) is arranged in the connecting pipe, two ends of the second cross rod (14) are fixed on the inner wall of the purification pipe (8), two ends of the spring (13) are respectively connected with the center of the first cross rod (12) and the center of the second cross rod (14), and the spring (13) is in a stretching state;

drive assembly includes gas collection box (15) and two spacing units, the shape of gas collection box (15) is the cuboid, gas collection box (15) are located between two spacing units, the opening of gas collection box (15) sets up downwards, spacing unit includes slide bar (16) and sliding ring (17), sliding ring (17) and gas collection box (15) fixed connection, sliding ring (17) cover is established on slide bar (16), one side that is close to slide bar (16) on the upper portion of gas collection box (15) is equipped with the unit of losing heart.

2. The MBR membrane module with the function of dredging as claimed in claim 1, wherein the air leakage unit comprises an air leakage opening, a sealing plate (18), a driving rod (19), a roller (20) and a fixing rod (21), the air leakage opening is arranged on the inner wall of the air collection box (15), the air collection box (15) is made of iron, the sealing plate (18) is made of magnet, the sealing plate (18) is located inside the air collection box (15), the sealing plate (18) and the air leakage opening are both circular, the diameter of the sealing plate (18) is greater than the inner diameter of the air leakage opening, the sealing plate (18) and the air leakage opening are coaxially arranged, one end of the driving rod (19) is vertically fixed on one side of the sealing plate (18) close to the sliding rod (16), the roller (20) is fixed on the other end of the driving rod (19), and the fixing rod (21) is fixed on one side of the sliding rod (16) close to the air leakage opening, far away from one end of the aeration The distance between one end of the fixed rod (21) far away from the sliding rod (16) and the gas collecting box (15) is larger than the distance between the circle center of the roller (20) and the gas collecting box (15), and the distance between one end of the fixed rod (21) far away from the sliding rod (16) and the gas collecting box (15) is smaller than the maximum distance between the roller (20) and the gas collecting box (15).

3. The MBR membrane module with the function of dredging according to claim 2, wherein a sealing ring (22) is arranged on one side of the sealing plate (18) close to the air leakage port, the sealing ring (22) is coaxially arranged with the sealing plate (18), the sealing ring (22) is in the shape of a conical cylinder, the maximum outer diameter of the sealing ring (22) is larger than the inner diameter of the air leakage port, the minimum outer diameter of the sealing ring (22) is smaller than the inner diameter of the air leakage port, and the outer diameter of one end, away from the sealing plate (18), of the sealing ring (22) is smaller than the outer diameter of the other end of the sealing ring (22).

4. The MBR membrane module with the function of dredging as claimed in claim 2, wherein a fixed ring (23) and a plurality of side rods (24) are arranged in the air leakage port, the fixed ring (23) is sleeved on the driving rod (19), the side rods (24) are circumferentially and uniformly distributed on the periphery of the fixed ring (23), and the fixed ring (23) is hermetically connected with the inner wall of the air leakage port through the side rods (24).

5. The MBR membrane module with the dredging function according to claim 1, wherein the periphery of the bottom end of the connecting pipe (9) is provided with a sealing ring (25) and a plurality of pull wires (5), the periphery of the connecting pipe (9) is fixed on the inner wall of the sealing ring (25), the pull wires (5) are uniformly distributed above the sealing ring (25) in the circumferential direction, the sealing ring (25) is fixedly connected with the water outlet pipe (4) through the pull wires (5), and the pull wires (5) are in a tightening state.

6. The MBR membrane module with the function of dredging according to claim 1, wherein the end of the gas collection box (15) close to the aeration pipe (3) is in the shape of a rectangular pyramid cylinder, and the size of the end of the gas collection box (15) close to the aeration pipe (3) is smaller than that of the other end of the gas collection box (15).