CN114772852A

CN114772852A - Sewage treatment device

Info

Publication number: CN114772852A
Application number: CN202210439895.3A
Authority: CN
Inventors: 宋超; 王旭; 赵云生; 董兴隆
Original assignee: Beijing Huayu Huihuang Ecological Environmental Protection Technology Co ltd
Current assignee: Beijing Huayu Huihuang Ecological Environmental Protection Technology Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-07-22
Anticipated expiration: 2042-04-25
Also published as: CN114772852B

Abstract

The utility model belongs to the technical field of the technique of environmental protection water treatment facilities and specifically relates to a sewage treatment device is related to, include the membrane cisterna, set up the first dynamic membrane group ware in last membrane cisterna, the below of going up the membrane cisterna is provided with down the membrane cisterna, be provided with cross-flow shearing aeration equipment in the membrane cisterna down, it is provided with the separate layer to go up between membrane cisterna and the lower membrane cisterna, set up the intercommunication groove that is used for going up membrane cisterna and lower membrane cisterna intercommunication on the separate layer, the upper surface of separate layer is provided with and is used for the fan board with intercommunication groove shutoff, the one end rotation of fan board cooperates on the separate layer, and the upper surface in last membrane cisterna is set up to the other end. This application has can be with aeration reutilization, and then reduces the effect of the extravagant phenomenon of aeration energy.

Description

Sewage treatment device

Technical Field

The application relates to the technical field of environment-friendly water treatment equipment, in particular to a sewage treatment device.

Background

At present, sewage treatment: in order to achieve the process of purifying sewage which is discharged into a certain water body or reused, the sewage treatment is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, wherein the sewage treatment process needs to use sewage treatment equipment to purify the sewage, and a dynamic membrane bioreactor is a novel sewage treatment equipment in the sewage treatment equipment, wherein a dynamic membrane refers to a filter cake layer formed by pre-coating agent or activated sludge on the surface of a base membrane (microfiltration membrane, ultrafiltration membrane) or a large-aperture support body, and has the advantages of large preparation flux, easiness in back washing, easiness in controlling membrane pollution and the like.

The existing dynamic membrane bioreactor usually consists of a treatment tank and a dynamic membrane group, when sewage is treated, the sewage firstly enters the treatment tank, then passes through the dynamic membrane group and is filtered through the dynamic membrane group, the sewage is treated, aeration needs to be introduced into the treatment tank in the sewage treatment process, and the sewage is directly discharged to the outside from the treatment tank after being used in the aeration process.

In view of the above-mentioned related arts, the inventors of the present invention have considered that there is a disadvantage that the discharge is performed after the use of aeration, which results in the waste of aeration energy.

Disclosure of Invention

In order to be able to utilize the aeration for the second time, and then reduce the extravagant phenomenon of aeration energy, this application provides a sewage treatment plant.

The application provides a sewage treatment plant adopts following technical scheme:

the utility model provides a sewage treatment device, includes the membrane cisterna, sets up the first dynamic membrane group ware in the membrane cisterna, the below of going up the membrane cisterna is provided with down the membrane cisterna, be provided with cross-flow shearing aeration equipment in the membrane cisterna down, it is provided with the separate layer to go up between membrane cisterna and the membrane cisterna down, set up the intercommunication groove that is used for going up membrane cisterna and membrane cisterna intercommunication down on the separate layer, the upper surface of separate layer is provided with the sector that is used for the shutoff of intercommunication groove, the one end of sector rotates to cooperate on the separate layer, and the upper surface in membrane cisterna is set up to the other end.

By adopting the technical scheme, the cross flow shearing aeration device is arranged, so that the aeration generated by the lower membrane tank is upwards diffused, the fan plate is pushed to rotate, the communicating groove is not blocked, then the aeration enters the upper membrane tank through the communicating groove, secondary utilization is carried out, and the phenomenon of aeration energy waste is reduced.

Optionally, a second dynamic membrane group device is arranged in the lower membrane pool.

Through adopting above-mentioned technical scheme, through the setting of second developments membrane group ware, can carry out secondary filter to the water that gets into in the lower membrane pond, filter the back and discharge, can make the purifying effect of water better.

Optionally, a first regenerative aeration device is arranged in the upper membrane tank, and a second regenerative aeration device is arranged in the lower membrane tank.

Through adopting above-mentioned technical scheme, through the setting of first regeneration aeration equipment and second regeneration aeration equipment, can produce the aeration, promote the treatment effect to sewage.

Optionally, a backwashing high liquid level marking line is arranged on the upper membrane pool, a liquid level meter is arranged on the upper membrane pool, and the first dynamic membrane group device is connected with a flushing device for flushing the first dynamic membrane group device.

Through adopting above-mentioned technical scheme, through the setting of level gauge, catch the liquid level of going up the membrane pond when the level gauge and surpass backwash high liquid level marking after, start washing unit, wash first dynamic membrane group ware, guarantee the normal use of first dynamic membrane group ware.

Optionally, the top of going up the membrane cisterna is provided with strong magnetic adsorption device, strong magnetic adsorption device is including setting up the mounting panel on going up the membrane cisterna inner wall and setting up on the mounting panel and be used for carrying out a plurality of adsorption tubes that adsorb to metal piece in the sewage.

Through adopting above-mentioned technical scheme, through strong magnetic adsorption equipment's setting, can adsorb the metallic debris in with sewage through the adsorption tube, reduce the metallic debris's in the sewage content, and then make the processing of sewage more convenient, the effect is fine.

Optionally, the adsorption tubes are arranged in a plurality along the height direction of the upper membrane pool, and the adsorption tubes are arranged in a staggered manner along the height direction of the upper membrane pool.

Through adopting above-mentioned technical scheme, through the crisscross setting of a plurality of adsorption tubes, make sewage behind the space between the adsorption tube through the top, can reach the adsorption tube department of below, adsorb metallic debris through the adsorption tube of below, and then can promote the adsorption effect to metallic debris.

Optionally, be provided with the limiting plate on the inner wall of going up the membrane pond, the one end that the limiting plate is close to the adsorption tube is provided with spacing inclined plane, spacing inclined plane sets up along the direction slope that highly upwards deviates from the adsorption tube of going up the membrane pond, be provided with on the mounting panel with the extrusion inclined plane of spacing inclined plane looks adaptation, and the mounting panel butt is on spacing inclined plane.

Through adopting above-mentioned technical scheme, through the setting of limiting plate, when installing in the membrane tank of mounting panel, carry out spacing processing to the mounting panel through the limiting plate, can reduce the phenomenon that the mounting panel dropped, will extrude the setting on inclined plane simultaneously, can make the better butt of mounting panel receive on the limiting plate.

Optionally, be provided with clamping device in the last membrane pond, clamping device is including being used for to the mounting panel extrusion locking and the grip block of unblock and the promotion subassembly that is used for promoting the grip block motion, it sets up on the limiting plate to promote the subassembly.

Through adopting above-mentioned technical scheme, through clamping device's setting, through promoting the subassembly, can promote the grip block to the mounting panel extrusion locking, realize the location to the mounting panel, make the installation of mounting panel in last membrane pond more stable.

Optionally, promote the subassembly including sliding fit promote the rack on the limiting plate, set up mount pad on last membrane pond, rotate the gear of cooperation on the mount pad and set up the dwang on the gear, the one end that promotes the rack and be close to the mounting panel is provided with the inclined plane with extrusion inclined plane looks adaptation, the gear meshes with promoting the rack mutually, the dwang deviates from one end and the grip block normal running fit of gear.

Through adopting above-mentioned technical scheme, when the mounting panel inserted to limiting plate department, the extrusion inclined plane can promote the inclined plane that promotes the rack, and then made the promotion rack to keeping away from mounting panel department and slide to drive gear revolve, drive the dwang and rotate, the dwang can drive the grip block and rotate to mounting panel department, and realize the extrusion locking to the mounting panel, make the installation of mounting panel more convenient.

Optionally, an elastic member for sliding the pushing rack close to the mounting plate is mounted on the inner wall of the upper membrane tank.

Through adopting above-mentioned technical scheme, through the setting of elastic component, when making the mounting panel no longer promote the rack, the elastic component release elasticity restoring force will promote the rack and slide on the direction of leaving the membrane cell inner wall back to drive gear revolve, drive the grip block and reset, make the resetting of grip block more convenient, labour saving and time saving.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the cross-flow shearing aeration device, the aeration generated by the lower membrane tank is upwards diffused, the fan plate is pushed to rotate and not to block the communicating groove, and then the aeration enters the upper membrane tank through the communicating groove for secondary utilization, so that the phenomenon of aeration energy waste is reduced;

2. through strong magnetic adsorption device's setting, can adsorb the metallic debris in with sewage through the adsorption tube, reduce the metallic debris's in the sewage content, and then make the processing of sewage more convenient, the effect is fine.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic configuration diagram showing a connection relationship between the strong magnetic adsorption device and the holding device;

FIG. 3 is a partial sectional view showing a connection relationship of a strong magnetic adsorption device and a clamp device;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a partially enlarged view at B in fig. 3.

Description of the reference numerals: 1. a membrane loading pool; 2. a first dynamic membrane combiner; 3. a membrane tank is arranged; 4. a cross-flow shearing aeration device; 5. a separation layer; 51. a communicating groove; 6. a fan plate; 7. a second dynamic membrane combiner; 8. a first regenerative aeration device; 9. a second regenerative aeration device; 10. a liquid level meter; 11. a flushing device; 12. a strong magnetic adsorption device; 121. mounting a plate; 122. an adsorption tube; 123. extruding the inclined plane; 124. a yielding groove; 13. a limiting plate; 131. a limit inclined plane; 14. a clamping device; 141. a clamping plate; 142. a pushing assembly; 143. pushing the rack; 144. a mounting base; 145. a gear; 146. rotating the rod; 15. an elastic member; 16. a pushing device; 161. a push plate; 162. a carriage; 163. a pushing assembly; 164. a screw; 165. a guide rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a sewage treatment device. Referring to fig. 1 and 2, including last membrane cisterna 1, set up first dynamic membrane group ware 2 in last membrane cisterna 1, the below of going up membrane cisterna 1 is provided with membrane cisterna 3 down, goes up membrane cisterna 1 and sets up with membrane cisterna 3 an organic whole down, and the top of going up membrane cisterna 1 is the open end, and the bottom of membrane cisterna 3 is the seal end down. Be provided with second developments membrane group ware 7 in the lower membrane pool 3, first developments membrane group ware 2 and second developments membrane group ware 7 are the rectangle structure, are provided with the drain pipe on the first developments membrane group ware 2, and drain pipe and second developments membrane group ware 7 intercommunication, all are provided with drainage system (can directly adopt drainage pipe and control valve) on first developments membrane group ware 2 and the second developments membrane group ware 7. When needing to sewage treatment, let in sewage from the top of last membrane cisterna 1 earlier, carry out sewage treatment through first dynamic membrane group ware 2 earlier, after the processing is accomplished, qualified water is directly got rid of, and unqualified water advances the drain pipe and enters into second dynamic membrane group ware 7 and carries out purification treatment once more, and the water after the processing is discharged through the drainage system of second dynamic membrane group ware 7, accomplishes the processing operation to sewage.

Referring to fig. 1 and 2, a separation layer 5 is arranged between the upper membrane pool 1 and the lower membrane pool 3, the separation layer 5 can be a rectangular plate, a plurality of communicating grooves 51 used for communicating the upper membrane pool 1 with the lower membrane pool 3 are formed in the separation layer 5, and the communicating grooves 51 are rectangular through grooves. The upper surface of separate layer 5 is provided with the fan board 6 that is used for the shutoff of intercommunication groove 51, and fan board 6 is the rectangular plate, and the one end of fan board 6 articulates in the upper surface of separate layer 5, and the upper surface of membrane pond 1 is set up to the other end. The fan plate 6 abuts against the separator 5 by the water pressure, and closes the communication groove 51. When a sufficient amount of gas is present in the lower membrane tank 3, the fan plate 6 is impacted, so that the fan plate 6 rotates and opens, and the gas can enter the upper membrane tank 1 through the communication groove 51.

Referring to fig. 1 and 2, a first regenerative aeration device 8 is arranged in the upper membrane tank 1, and a second regenerative aeration device 9 is arranged in the lower membrane tank 3 for generating aeration for sewage treatment. Go up and be provided with the high liquid level marking of backwash on the membrane cisterna 1, go up and be provided with level gauge 10 on the membrane cisterna 1, first developments membrane group ware 2 is connected with and is used for organizing the washing unit 11 that ware 2 washed to first developments membrane, washing unit 11 can directly adopt flushing pipe and control valve, after the liquid level of membrane cisterna 1 surpassed the high liquid level marking of backwash in the capture of level gauge 10, the control valve that will flush the pipeline opens, through flushing pipe jet water, wash first developments membrane group ware 2, the system need not to shut down this moment, the stability and the high efficiency of system have been guaranteed.

Referring to fig. 2 and 3, in order to treat the magnetic metal debris in the sewage, the effect of sewage treatment is improved, the top end of the upper membrane pool 1 is provided with the strong magnetic adsorption device 12, the strong magnetic adsorption device 12 comprises an installation plate 121 arranged on the inner wall of the upper membrane pool 1 and a plurality of adsorption tubes 122 arranged on the installation plate 121 and used for adsorbing the metal debris in the sewage, the installation plate 121 is a rectangular plate, the installation plate 121 is arranged at intervals along the length direction of the upper membrane pool 1 and is provided with two opposite installation plates, the bottom end of the installation plate 121 is provided with an extrusion inclined plane 123, the extrusion inclined plane 123 is arranged along the direction of the height of the upper membrane pool 1 towards the upper inner wall of the upper membrane pool 1 in an inclined manner. The adsorption tubes 122 are made of a magnetic material, the adsorption tubes 122 are fixedly connected with one of the mounting plates 121, two rows of adsorption tubes 122 are arranged along the height direction of the upper membrane pool 1, three adsorption tubes 122 are arranged in one row above the adsorption tubes, two adsorption tubes 122 are arranged in one row below the adsorption tubes, and the two rows of adsorption tubes 122 are arranged in a staggered manner along the height direction of the upper membrane pool 1.

Referring to fig. 2 and 3, fixed limiting plate 13 that is provided with on the inner wall of going up membrane pond 1, limiting plate 13 is provided with two along the length direction of going up membrane pond 1 relatively, and limiting plate 13 is the rectangular plate, combines fig. 4, and the one end that limiting plate 13 is close to adsorption tube 122 is provided with spacing inclined plane 131, and spacing inclined plane 131 upwards sets up towards the direction slope that deviates from adsorption tube 122 along the height of going up membrane pond 1, extrudes inclined plane 123 and spacing inclined plane 131 looks adaptation. When the mounting plate 121 is mounted, the mounting plate 121 is inserted into the upper membrane tank 1, and the mounting plate 121 abuts against the limiting inclined surface 131, thereby completing the mounting operation of the mounting plate.

Referring to fig. 3 and 4, in order to make the installation of the installation plate 121 more stable, the clamping devices 14 are arranged in the upper membrane pool 1, two sets of the clamping devices 14 are oppositely arranged along the length direction of the upper membrane pool 1, two clamping devices 14 are arranged at intervals along the width direction of the upper membrane pool 1 in each set, and the installation plate 121 is pressed and locked by the clamping devices 14.

Referring to fig. 3 and 4, the clamping device 14 includes a clamping plate 141 for pressing, locking and unlocking the mounting plate 121, and a pushing assembly 142 for pushing the clamping plate 141 to move, the clamping plate 141 is a rectangular plate disposed along the height direction of the upper membrane tank 1, and the clamping plate 141 may be made of an elastic rubber material. The pushing component 142 is disposed on the limiting plate 13, the pushing component 142 includes a pushing rack 143 slidably fitted on the upper surface of the limiting plate 13, a mounting seat 144 fixedly disposed on the upper membrane pool 1, a gear 145 rotatably fitted on the mounting seat 144, and a rotating rod 146 fixedly disposed on the gear 145, the mounting seat 144 is in an "i" shape, the rotating rod 146 is a rectangular rod, one end of the rotating rod 146 is fixed to the gear 145, and the other end is hinged to the side of the clamping plate 141. The pushing rack 143 is meshed with the gear 145, the lower surface of the pushing rack 143 abuts against the upper surface of the limiting plate 13, and an inclined surface matched with the extrusion inclined surface 123 is arranged at one end, close to the mounting plate 121, of the pushing rack 143.

Referring to fig. 3 and 4, an elastic member 15 for sliding the pushing rack 143 to a position close to the mounting plate 121 is fixedly mounted on the inner wall of the upper membrane tank 1, the elastic member 15 may be a spring, one end of the elastic member 15 is fixedly disposed on the inner wall of the upper membrane tank 1, and the other end is fixedly disposed on a side surface of the pushing rack 143. When the mounting plate 121 is installed and the mounting plate 121 is inserted into the position of the limiting plate 13, the extrusion inclined plane 123 extrudes the inclined plane of the pushing rack 143, so that the pushing rack 143 slides away from the mounting plate 121 and extrudes the elastic member 15, and when the pushing rack 143 slides, the gear 145 can be driven to rotate, the rotating rod 146 is driven to rotate, and the clamping plate 141 is driven to rotate at the same time, so that the clamping plate 141 abuts against the side surface of the mounting plate 121 and is extruded and locked to the mounting plate 121, and the mounting operation on the mounting plate 121 is completed. When the strong magnetic adsorption device 12 needs to be detached from the upper membrane tank 1, the mounting plate 121 is directly pulled upwards, so that the extrusion inclined plane 123 does not extrude the inclined plane of the pushing rack 143 any more, and meanwhile, the elastic part 15 drives the pushing rack 143 to slide towards the position close to the mounting plate 121, so as to drive the gear 145 and the rotating rod 146 to rotate, and drive the clamping plate 141 to rotate towards the direction far away from the mounting plate 121.

Referring to fig. 3 and 5, in order to clean the metal debris on the adsorption tube 122, a pushing device 16 is provided on the adsorption tube 122. The pushing device 16 includes a pushing plate 161 sliding fitted on the adsorption tube 122, a sliding frame 162 sliding fitted on the adsorption tube 122, and a pushing component 163 for pushing the pushing plate 161, the pushing plate 161 is a rectangular plate, and the pushing plate 161 is arranged along the height direction of the upper membrane pool 1, two abdicating grooves 124 are provided on the outer peripheral surface of the adsorption tube 122, the two abdicating grooves 124 are symmetrically arranged with the central axis of the adsorption tube 122, the abdicating grooves 124 are rectangular blind grooves along the length direction of the adsorption tube 122, one end of the abdicating groove 124 departing from the pushing plate 161 is a sealed end, and the other end is an open end.

Referring to fig. 3 and 5, the sliding frame 162 is composed of a sliding sleeve penetrating the adsorption tube 122 and two fixing rods fixed on the sliding sleeve, the fixing rods are cylindrical rods arranged along the length direction of the adsorption tube 122, the two fixing rods are symmetrically arranged around the central axis of the adsorption tube 122, the sliding sleeve is slidably fitted in the abdicating groove 124, one end of each fixing rod is fixedly arranged on the side of the pushing plate 161, and the other end of each fixing rod is fixedly arranged on the side of the mounting plate 121 away from the pushing plate 161.

Referring to fig. 3 and 5, the pushing assembly 163 includes a screw 164 and a guide rod 165 rotatably fitted in the mounting plate 121 at a position away from the pushing plate 161, the screw 164 is inserted into the adsorption tube 122 at a middle position of the upper row, the inner surface of the adsorption tube 122 is threaded to be in threaded engagement with the screw 164, and one end of the screw 164 located on the sliding frame 162 is rotatably fitted in the sliding frame 162. The guide rod 165 is arranged along the length direction of the upper membrane pool 1, the guide rod 165 penetrates through the adsorption pipe 122, the guide rod 165 is in sliding fit with the mounting plate 121 deviated from the pushing plate 161, and the guide rod 165 is fixedly connected with the corresponding sliding frame 162.

Referring to fig. 3 and 5, after the ferromagnetic adsorption device 12 is detached from the upper membrane tank 1, when metal debris on the outer peripheral surface of the adsorption tube 122 needs to be cleaned, the screw 164 is rotated first, the screw 164 is rotated out of the adsorption tube 122, and the sliding frame 162 is driven to slide in a direction away from the push plate 161, the guide rod 165 is driven to slide in the adsorption tube 122, the push plate 161 and the mounting plate 121 away from the push plate 161 are driven to slide towards the outside of the adsorption tube 122 at the same time, the metal debris on the adsorption tube 122 is pushed by the push plate 161, and the metal debris is cleaned.

The implementation principle of the sewage treatment device in the embodiment of the application is as follows: when needing to handle sewage, earlier through in installing strong magnetic adsorption device 12 last membrane cisterna 1, and it is tight to push mounting panel 121 through clamping device 14 and press from both sides, let in sewage in the last membrane cisterna 1 afterwards, when through strong magnetic adsorption device 12 department, adsorb the processing through the metal debris of adsorption tube 122 in with sewage, the back sewage of handling reachs first dynamic membrane group ware 2 departments, first dynamic membrane group ware 2 carries out purification treatment to sewage, qualified water directly discharges after the processing, in unqualified water is carried second dynamic membrane group ware 7, carry out purification treatment through second dynamic membrane group ware 7, the water after the processing directly discharges, accomplish the processing operation to sewage.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a sewage treatment device, includes last membrane cisterna (1), sets up first dynamic membrane group ware (2) in last membrane cisterna (1), its characterized in that: the membrane bioreactor is characterized in that a lower membrane tank (3) is arranged below the upper membrane tank (1), a cross flow shearing aeration device (4) is arranged in the lower membrane tank (3), a separation layer (5) is arranged between the upper membrane tank (1) and the lower membrane tank (3), a communication groove (51) for communicating the upper membrane tank (1) with the lower membrane tank (3) is formed in the separation layer (5), a fan plate (6) for plugging the communication groove (51) is arranged on the upper surface of the separation layer (5), one end of the fan plate (6) is rotated and matched with the separation layer (5), and the other end of the fan plate is erected on the upper surface of the upper membrane tank (1).

2. The sewage treatment apparatus according to claim 1, wherein: and a second dynamic membrane group device (7) is arranged in the lower membrane pool (3).

3. The sewage treatment apparatus according to claim 2, wherein: a first regenerative aeration device (8) is arranged in the upper membrane pool (1), and a second regenerative aeration device (9) is arranged in the lower membrane pool (3).

4. The sewage treatment apparatus according to claim 3, wherein: go up and be provided with backwash high liquid level marking on membrane cisterna (1), go up and be provided with level gauge (10) on membrane cisterna (1), first dynamic membrane group ware (2) are connected with and are used for washing unit (11) that first dynamic membrane group ware (2) washed.

5. The sewage treatment apparatus according to claim 1, wherein: go up the top of membrane cisterna (1) and be provided with strong magnetic adsorption device (12), strong magnetic adsorption device (12) including set up mounting panel (121) on last membrane cisterna (1) inner wall and set up on mounting panel (121) and be used for carrying out absorbent a plurality of adsorption tubes (122) to metal debris in the sewage.

6. The sewage treatment apparatus according to claim 5, wherein: the adsorption tubes (122) are arranged in a plurality along the height direction of the upper membrane pool (1), and the adsorption tubes (122) are arranged in a staggered manner along the height direction of the upper membrane pool (1).

7. The sewage treatment apparatus according to claim 6, wherein: go up and be provided with limiting plate (13) on the inner wall of membrane cisterna (1), the one end that limiting plate (13) are close to adsorption tube (122) is provided with spacing inclined plane (131), the direction slope that highly upwards deviates from adsorption tube (122) along last membrane cisterna (1) sets up spacing inclined plane (131), be provided with on mounting panel (121) with the extrusion inclined plane (123) of spacing inclined plane (131) looks adaptation, and mounting panel (121) butt on spacing inclined plane (131).

8. The sewage treatment apparatus according to claim 7, wherein: go up and be provided with clamping device (14) in membrane pond (1), clamping device (14) are including being used for to mounting panel (121) extrusion locking and the grip block (141) of unblock and be used for promoting push assembly (142) of grip block (141) motion, push assembly (142) set up on limiting plate (13).

9. The sewage treatment apparatus according to claim 8, wherein: promote subassembly (142) including sliding fit promote rack (143) on limiting plate (13), set up mount pad (144) on last membrane pond (1), gear (145) that the normal running fit on mount pad (144) and set up dwang (146) on gear (145), the one end that promotes rack (143) is close to mounting panel (121) is provided with the inclined plane with extrusion inclined plane (123) looks adaptation, gear (145) and promotion rack (143) mesh mutually, the one end that dwang (146) deviates from gear (145) and grip block (141) normal running fit.

10. The sewage treatment apparatus according to claim 9, wherein: and an elastic piece (15) for sliding the pushing rack (143) to a position close to the mounting plate (121) is mounted on the inner wall of the upper membrane pool (1).