CN219701193U

CN219701193U - Airlift sludge discharge device of sedimentation tank

Info

Publication number: CN219701193U
Application number: CN202320864402.0U
Authority: CN
Inventors: 罗丹; 胡鸿; 杨永飞; 毛卫兵; 何辉; 张亚
Original assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Current assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-09-19
Anticipated expiration: 2033-04-18

Abstract

The utility model relates to the technical field of sludge discharge devices, and discloses a gas-lift sludge discharge device of a sedimentation tank, which comprises the sedimentation tank with a sludge collecting tank at the bottom, wherein one end of the sludge collecting tank is a collecting end, and the device further comprises: the mud pushing mechanism is used for pushing the mud in the mud collecting groove to the collecting end; the air lift mud discharging mechanism comprises an air feeder, an air supply pipe, an air lift mud discharging pipe and a mud discharging canal, wherein the mud discharging canal is arranged on the top side of the sedimentation tank, the air feeder is communicated with one end of the air supply pipe, the other end of the air supply pipe is branched into a flexible branch pipe and a gas lift branch pipe, one end of the air lift mud discharging pipe is a collecting port, the other end of the air lift mud discharging pipe is a mud outlet, the mud outlet is communicated into the mud discharging canal, the collecting port stretches into the mud collecting groove to be opposite to the collecting port, the gas lift branch pipe is communicated with one side of the air lift mud discharging pipe close to the collecting port, and the pipe orifice of the flexible branch pipe is arranged at the bottom of the collecting port. According to the utility model, the sludge is concentrated to the collecting end by using the sludge pushing mechanism, and the sludge is lifted and discharged by using the air lift sludge discharging mechanism, so that the sludge is prevented from being accumulated and hardened in the sludge collecting groove.

Description

Airlift sludge discharge device of sedimentation tank

Technical Field

The utility model relates to the technical field of sludge discharge devices, in particular to a gas-lift sludge discharge device of a sedimentation tank.

Background

The sedimentation tank is used for settling impurities or soil and the like to the bottom of the tank in a sedimentation mode, so that the clean water above the tank body can be discharged into the next tank body for continuous water treatment. For sludge deposited to the bottom of the tank, the sludge must be removed at regular time by a sludge discharge device.

One common sludge discharge mode of the existing sedimentation tank is to suck and discharge sludge by using a pump, and the mode has the following problems: the energy consumption is increased, and the sludge is accumulated in the sludge hopper for a long time, so that the sludge hopper is easy to be blocked, and the sludge discharge is not smooth; in order to save investment, a mode that one sewage pump is provided with a plurality of mud suction pipes is adopted, so that uneven mud discharge is easy to occur, and the problem of mud collection dead zone occurs at the bottom of the tank.

In addition, there are sedimentation tanks which use a gas-lift sludge discharge device, and the air is conveyed into a gas-lift sludge discharge pipe, and the bottom opening of the gas-lift sludge discharge pipe faces to a sludge collecting tank at the bottom of the tank so as to mix the sludge in a sludge suction pipe with the air and discharge the mixed sludge ascending along the gas-lift sludge discharge pipe. However, in order to ensure the air-lift mud discharging effect, the bottom opening of the air-lift mud discharging pipe is limited in size, mud can be discharged only in a local area of the mud collecting groove, and mud collecting dead areas are easy to appear at the bottom of the tank.

Disclosure of Invention

The utility model aims to solve the technical problems that: the existing sedimentation tank mud discharging device has low mud discharging efficiency, and the problem of mud collecting dead zone easily occurs at the bottom of the sedimentation tank.

In order to solve the technical problems, the utility model provides a gas-lift mud discharging device of a sedimentation tank, which comprises the sedimentation tank, wherein a mud collecting groove is arranged at the bottom of the sedimentation tank, one end of the mud collecting groove is a collecting end, and the gas-lift mud discharging device of the sedimentation tank further comprises:

the mud pushing mechanism is used for pushing the mud in the mud collecting groove to the collecting end;

the air lift sludge discharging mechanism comprises an air feeder, an air supply pipe, an air lift sludge discharging pipe and a sludge discharging channel, wherein the sludge discharging channel is arranged on the top side of the sedimentation tank, the air feeder is communicated with one end of the air supply pipe, the other end of the air supply pipe is branched into a flexible branch pipe and an air lift branch pipe, one end of the air lift sludge discharging pipe is a sludge outlet, the sludge outlet is communicated into the sludge discharging channel, a collecting port is formed in the other end of the air lift sludge discharging pipe, the collecting port stretches into the sludge collecting tank and is right opposite to the collecting port, the air lift branch pipe is communicated with one side of the air lift sludge discharging pipe, which is close to the collecting port, and a pipe orifice of the flexible branch pipe is arranged at the bottom of the collecting port.

In some embodiments, the mud pushing mechanism is a screw conveyor, the screw conveyor comprises a motor, a speed reducer and a helical blade, the motor is mounted on the outer wall of one side of the sediment Chi Yuan, which is away from the collecting end, the motor is provided with an output end, the output end penetrates through the tank wall of the sedimentation tank, the helical blade is arranged in the mud collecting groove, and one end of the helical blade, which is far away from the collecting end, is sequentially connected with the speed reducer and the output end.

In some embodiments, the air lift mud discharging device of the sedimentation tank further comprises a control system, a first valve is arranged on the flexible branch pipe, a second valve is arranged on the air lift branch pipe, and the control system is electrically connected with the air feeder, the motor, the first valve and the second valve.

In some embodiments, the mud collecting grooves sequentially decrease in width from top to bottom along the depth direction of the sedimentation tank.

In some embodiments, the collecting end is provided with a collecting pit, the bottom wall of the collecting pit protrudes downwards from the bottom wall of the mud collecting groove, the pipe orifice of the flexible branch pipe is arranged at the bottom of the collecting pit, and the collecting opening extends into the collecting pit.

In some embodiments, the flexible branch pipe comprises a flexible pipe body and a diffusion nozzle, the diffusion nozzle comprises a guide part, a mounting part and a diffusion part, the mounting part is connected with the flexible pipe body, a communication hole for communicating with the flexible pipe body is formed in the mounting part, the guide part is parallel and is arranged on one side of the mounting part away from the flexible pipe body at intervals, the diffusion part is connected with the mounting part and the periphery of the guide part, the diffusion part and the mounting part are arranged in an included angle manner, a diffusion cavity is defined by the mounting part, the diffusion part is provided with a plurality of nozzles at intervals, and the guide part is parallel to the bottom wall of the collecting pit.

In some embodiments, the cross section of the mounting portion is square, the shape and the size of the guiding portion are consistent with those of the mounting portion, the diffusing portion is perpendicular to the mounting portion, and two nozzles are arranged on each side of the periphery of the mounting portion at intervals along the diffusing portion.

In some embodiments, the bottom wall of the side of the sludge collection trough facing away from the collection end is arcuate in cross section.

In some embodiments, the mud outlet is upward, and a mud guard is disposed on the top side of the mud outlet, and the mud guard is disposed between two side walls of the mud discharge channel.

In some embodiments, the airlift sludge discharge device of the sedimentation tank further comprises a sludge scraping mechanism for scraping the bottom sludge into the sludge collection tank.

Compared with the prior art, the air-lift mud discharging device of the sedimentation tank has the beneficial effects that:

this airlift sludge discharge device of sedimentation tank pushes away mud mechanism through setting up, can push away the collection end of collection mud inslot with the mud of collection mud inslot to collection end of collection mud inslot, avoid mud to pile up in collection mud inslot, this airlift sludge discharge device of sedimentation tank still is equipped with airlift sludge discharge mechanism, it includes air supply ware, the air supply pipe, airlift sludge discharge pipe and row's mud canal, air supply ware carries the air supply pipe, the air supply pipe branch is flexible branch pipe and air stripping branch pipe, wherein flexible branch pipe carries out the gas to the mud of collection end bottom of collection mud inslot and spouts the dispersion, air stripping branch pipe then communicates to the collection mouth one side of airlift sludge pipe just facing to the collection end, from this gas gets into airlift sludge discharge pipe, drive mud along airlift sludge discharge pipe rise and finally gather into in the mud canal under buoyancy effect. This airlift sludge discharge device of sedimentation tank uses pushing away mud mechanism to concentrate to collect the end with mud from the mud collection groove and handles and has improved the mud efficiency greatly, and guaranteed that mud in time discharges, avoided the mud to pile up the hardening in the mud collection groove, still used the branch to flexible the air supply pipe of branch pipe and stripping branch pipe to carry out dual utilization to the air at the collection end, both can jet off collecting end bottom mud, can drive the rising of mud along airlift sludge discharge pipe for airlift sludge pipe air feed again and discharge, effectively solve the unsmooth problem of sludge discharge, avoided the hardening and the come-up of mud.

Drawings

FIG. 1 is a top view of a lift mud discharging apparatus of a settling tank according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken in the direction A-A of FIG. 1;

FIG. 3 is a cross-sectional view in the direction B-B of FIG. 1;

FIG. 4 is a cross-sectional view in the direction C-C of FIG. 1;

FIG. 5 is an enlarged view at D of FIG. 2;

in the figure, 10, a sedimentation tank; 20. a mud collecting groove; 21. a collection end; 30. a mud pushing mechanism; 31. a motor; 32. a speed reducer; 33. a helical blade; 40. a airlift sludge discharge mechanism; 41. an air supply; 42. an air supply pipe; 421. a flexible branch pipe; 4211. the tube body is scratched; 4212. a diffusion nozzle; 42121. a guide part; 42122. a mounting part; 42123. a diffusion section; 421231, nozzles; 422. a gas stripping branch pipe; 43. a gas-lift mud discharging pipe; 431. a collection port; 432. a mud outlet; 44. a mud discharging channel; 45. a main air supply pipe; 46. a mud discharging main pipe; 47. a mud guard; 50. a mud scraping mechanism; 60. collecting pits; 70. a first bracket; 80. a second bracket; 81. a hoop; 90. and (5) a mounting seat.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1 to 4, the air-lift sludge discharge device of the sedimentation tank according to the preferred embodiment of the present utility model includes a sedimentation tank 10, a sludge collecting tank 20 is disposed at the bottom of the sedimentation tank 10, one end of the sludge collecting tank 20 is a collecting end 21, and the air-lift sludge discharge device of the sedimentation tank further includes:

a mud pushing mechanism 30, wherein the mud pushing mechanism 30 is used for pushing the mud in the mud collecting groove 20 to the collecting end 21;

the air-lift sludge discharging mechanism 40, the air-lift sludge discharging mechanism 40 comprises an air feeder 41, an air supply pipe 42, an air-lift sludge discharging pipe 43 and a sludge discharging channel 44, the air feeder 41 can be an air compressor or an air blower, the sludge discharging channel 44 is arranged on the top side of the sedimentation tank 10, the air feeder 41 is communicated with one end of the air supply pipe 42, the air feeder 41 can be preferably communicated with one air supply main pipe 45, the air supply main pipe 45 is provided with a plurality of air supply pipes 42 which are in one-to-one correspondence with each sedimentation tank 10 and are communicated with the air supply main pipe 45, the other end of the air supply pipe 42 is branched into a flexible branch pipe 421 and a lifting branch pipe 422, one end of the air-lift sludge discharging pipe 43 is a collecting port 431, the other end of the air-lift sludge discharging pipe 43 is a sludge outlet 432, the sludge outlet 432 is communicated into the sludge discharging channel 44, the bottom of the sludge discharging main pipe 46 is additionally communicated with the bottom of the sludge discharging channel 44, the collecting port 431 stretches into the sludge collecting tank 20 and is opposite to the collecting end 21, the air lifting branch pipe 422 is communicated with one side of the air supply main pipe 43, which is close to the collecting port 431, the collecting port 421 is arranged at the bottom 21 of the collecting end 21.

According to the air-lift sludge discharge device of the sedimentation tank based on the above embodiment, by arranging the sludge pushing mechanism 30, sludge in the sludge collecting tank 20 can be pushed to the collecting end 21 of the sludge collecting tank 20, and the sludge is prevented from accumulating in the sludge collecting tank 20, the air-lift sludge discharge device of the sedimentation tank is further provided with the air-lift sludge discharge mechanism 40, which comprises an air feeder 41, an air supply pipe 42, an air-lift sludge discharge pipe 43 and a sludge discharge channel 44, the air feeder 41 conveys air to the air supply pipe 42, the air supply pipe 42 is branched into a flexible branch pipe 421 and a air-lift branch pipe 422, the flexible branch pipe 421 carries out air-jet flushing on sludge at the bottom of the collecting end 21 of the sludge collecting tank 20, the air-lift branch pipe 422 is communicated to the collecting port 431 side of the air-lift sludge discharge pipe 43, and thus the air enters the air-lift sludge discharge pipe 43 from the air-lift branch pipe 422, and the air-lift sludge is driven to rise along the air-lift sludge discharge pipe 43 and finally collect into the sludge discharge channel 44 under the buoyancy.

In some embodiments, the mud pushing mechanism 30 is a screw conveyor, the screw conveyor includes a motor 31, a speed reducer 32 and a helical blade 33, the motor 31 is mounted on an outer wall of one side of the sedimentation tank 10 away from the collecting end 21, the motor 31 has an output end, the output end is arranged on a tank wall of the sedimentation tank 10 in a penetrating manner, the helical blade 33 is arranged in the mud collecting tank 20, and one end of the helical blade 33 away from the collecting end 21 is sequentially connected with the speed reducer 32 and the output end. By arranging the screw conveyor to push the sludge in the sludge collecting tank 20, the sludge in the sludge collecting tank 20 can be discharged in time, the accumulation of the sludge is avoided, the sludge turning phenomenon is avoided, and the water quality is stabilized.

Preferably, the air lift mud discharging device of the sedimentation tank further comprises a control system, a first valve is arranged on the flexible branch pipe 421, a second valve is arranged on the air lift branch pipe 422, and the control system is electrically connected with the air feeder 41, the motor 31, the first valve and the second valve, so that the first valve and the second valve can be selectively opened or closed as required. When in use, the first valve can be opened first, the second valve can be closed, so that the air in the air supply pipe 42 enters the flexible branch pipe 421 to provide larger dispersion force for dispersing the sludge at the bottom of the collecting end 21 by air jet, then the first valve is closed, the second valve is opened, so that the air in the air supply pipe 42 is led into the air stripping branch pipe 422, and therefore sufficient bubbles are provided to lift and discharge the dispersed and mixed muddy water upwards.

In some embodiments, the sludge collection tank 20 is sequentially reduced in width from top to bottom in the depth direction of the sedimentation tank 10 so that sludge can be naturally collected along the inclined side walls of the sludge collection tank 20.

In some embodiments, the collecting end 21 is provided with a collecting pit 60, the bottom wall of the collecting pit 60 protrudes downwards from the bottom wall of the sludge collecting tank 20, therefore, the sludge pushing mechanism 30 can push the sludge collected in the sludge collecting tank 20 into the collecting pit 60, the sludge in the collecting pit 60 cannot flow back into the sludge collecting tank 20, the pipe orifice of the flexible branch pipe 421 is arranged at the bottom of the collecting pit 60, and the collecting port 431 extends into the collecting pit 60, so that the air-lift sludge discharge pipe 43 can collect and discharge the sludge collected in the collecting pit 60.

As shown in fig. 5, in some embodiments, the flexible branch pipe 421 includes a flexible pipe 4211 and a diffusion nozzle 4212, the diffusion nozzle 4212 includes a guiding portion 42121, a mounting portion 42122 and a diffusion portion 42123, the mounting portion 42122 is connected to the flexible pipe 4211, a communication hole for communicating with the flexible pipe 4211 is formed in the mounting portion 42122, the guiding portion 42121 is parallel to and spaced apart from one side of the mounting portion 42122 away from the flexible pipe 4211, the diffusion portion 42123 is connected to the outer peripheries of the mounting portion 42122 and the guiding portion 42121, the diffusion portion 42123 and the mounting portion 42122 are disposed at an included angle, the mounting portion 42122, the diffusion portion 42123 and the guiding portion 42121 define a diffusion cavity, a plurality of nozzles 421231 are formed in the diffusion portion 42123 at intervals, the guiding portion 42121 is parallel to the bottom wall of the collecting pit 60, and a mounting seat 90 for firmly mounting the diffusion nozzle 4212 at the bottom of the collecting pit 60 is preferably further provided in the collecting pit 60. By installing the diffusion nozzle 4212 at one end of the flexible pipe 4211, the diffusion nozzle 4212 is a hollow diffusion chamber, and air enters the diffusion chamber from the flexible pipe 4211, and is ejected from the nozzles 421231 in each direction due to the blocking of the guide portion 42121, so that the gas ejection direction is adjusted, and the range in which the flexible branch pipe 421 can act is widened.

In some embodiments, the cross-section of the mounting portion 42122 is square, the guide portion 42121 is shaped and sized to conform to the shape of the mounting portion 42122, and the diffuser portion 42123 is perpendicular to the mounting portion 42122 such that air is ejected from the nozzles 421231 in a direction parallel to the bottom wall of the collecting well 60, and the diffuser portion 42123 is provided with two nozzles 421231 spaced along each side of the outer periphery of the mounting portion 42122.

In some embodiments, the bottom wall of the side of the sludge collection trough 20 facing away from the collecting end 21 is arcuate in cross-section to mate with the side of the helical blades 33 facing the bottom wall of the sludge collection trough 20.

In some embodiments, the mud outlet 432 faces upwards, and a mud guard 47 is disposed on the top side of the mud outlet 432, and the mud guard 47 is disposed between two side walls of the mud discharging channel 44 to prevent mud discharged from the mud outlet 432 from splashing out of the mud discharging channel 44.

In some embodiments, the air-lift sludge discharge device of the sedimentation tank further comprises a sludge scraping mechanism 50, the sludge scraping mechanism 50 is electrically connected with the control system, the sludge scraping mechanism 50 is used for scraping sludge at the bottom of the sedimentation tank into the sludge collecting tank 20, so that the accumulation of sludge in the sedimentation tank 10 is avoided, and a plurality of sludge collecting tanks 20 and a plurality of air-lift sludge discharge mechanisms 40 are not required to be arranged in one sedimentation tank 10, thus greatly improving the sludge discharge efficiency and saving the cost of the sludge discharge device of the sedimentation tank 10.

In some embodiments, the first bracket 70 is welded on the air supply pipe 42, and the first bracket 70 is fixedly welded on the inner wall of the sedimentation tank 10, so that the air supply pipe 42 is stable and does not shake; the second bracket 80 is welded on the air-lift mud discharging pipe 43, the second bracket 80 is fixedly welded on the inner wall of the sedimentation tank 10, the air-lift mud discharging pipe 43 and the second bracket 80 are locked through the anchor ear 81, and the anchor ear 81 is preferably a U-shaped anchor ear.

The working process of the utility model is as follows: firstly, the air feeder 41 is started, the first valve is opened, air is supplied into the flexible branch pipe 421 for a period of time, the accumulated sludge at the bottom of the collecting pit 60 is dispersed, then the first valve is closed, the second valve is opened, the air feeder 41 supplies air to the air stripping branch pipe 422, the air stripping branch pipe 422 conveys air to one side of a collecting port 431 of the air stripping mud discharging pipe 43, air finally enters the collecting pit 60, at the moment, the mud scraping mechanism 50 is started to push the sludge into the mud collecting groove 20, meanwhile, the screw conveyor is started to push the sludge in the mud collecting groove 20 into the collecting pit 60 with lower topography, under the action of the air, the air drives a mixture of water and the sludge to be discharged into the mud discharging canal 44 through the air stripping mud discharging pipe 43, and then the sediment tank 10 is discharged through the mud discharging main pipe 46.

In summary, the embodiment of the utility model provides an air-lift sludge discharging device of a sedimentation tank, which scrapes sludge into a sludge collecting tank 20 by utilizing a sludge scraping mechanism 50, then uses a sludge pushing mechanism 30 to push and concentrate sludge in the sludge collecting tank 20 to a collecting end 21 for treatment, greatly improves sludge discharging efficiency, ensures timely discharge of the sludge, avoids accumulation and hardening of the sludge in the sludge collecting tank 20, and uses an air supply pipe 42 branched into a flexible branch pipe 421 and a stripping branch pipe 422 at the collecting end 21 to double-utilize air supplied by an air feeder 41, so that the sludge at the bottom of the collecting end 21 can be sprayed and dispersed, and the air-lift sludge discharging pipe 43 can be supplied with air to drive the sludge to be lifted and discharged along the air-lift sludge discharging pipe 43, thereby effectively solving the problem of unsmooth sludge discharging and avoiding the hardening and floating of the sludge. Because the openings of the collecting port 431 and the flexible branch pipe 421 are basically and completely covered by the sludge, impurity sludge at a deeper position in the pond can be discharged, the sludge discharge amount can be randomly regulated, sludge discharge points can be arranged according to the needs, the limitation of the conditions of working environments such as pond depth and the like is avoided, the whole process is intensive, the automation degree is high, the operation is simple, and the sludge discharge system is suitable for sludge discharge systems of different types of sedimentation ponds.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. The utility model provides a gas lift mud discharging device of sedimentation tank, includes the sedimentation tank, its characterized in that, the bottom of sedimentation tank is equipped with album mud groove, the one end in album mud groove is the collecting end, the gas lift mud discharging device of sedimentation tank still includes:

the air lift sludge discharging mechanism comprises an air feeder, an air supply pipe, an air lift sludge discharging pipe and a sludge discharging channel, wherein the sludge discharging channel is arranged on the top side of the sedimentation tank, the air feeder is communicated with one end of the air supply pipe, the other end of the air supply pipe is branched into a flexible branch pipe and an air lift branch pipe, one end of the air lift sludge discharging pipe is a collecting port, the other end of the air lift sludge discharging pipe is a sludge outlet, the sludge outlet is communicated into the sludge discharging channel, the collecting port stretches into the sludge collecting tank and is right opposite to the collecting port, the air lift branch pipe is communicated with one side of the air lift sludge discharging pipe, and the pipe orifice of the flexible branch pipe is arranged at the bottom of the collecting port.

2. The air-lift mud discharging device of a sedimentation tank according to claim 1, wherein the mud pushing mechanism is a screw conveyor, the screw conveyor comprises a motor, a speed reducer and a screw blade, the motor is mounted on the outer wall of one side of the sedimentation Chi Yuan away from the collection end, the motor is provided with an output end, the output end penetrates through the tank wall of the sedimentation tank, the screw blade is arranged in the mud collecting tank, and one end of the screw blade, which is far away from the collection end, is sequentially connected with the speed reducer and the output end.

3. The apparatus according to claim 1, further comprising a control system, wherein the flexible manifold is provided with a first valve, the air-stripping manifold is provided with a second valve, and the control system is electrically connected to the air supply, the first valve, and the second valve.

4. The apparatus according to claim 1, wherein the sludge collecting grooves are sequentially reduced in width from top to bottom in the depth direction of the sedimentation tank.

5. The airlift sludge discharge device of a sedimentation tank as claimed in claim 1, wherein the collection end is provided with a collection pit, a bottom wall of the collection pit protrudes downwards from a bottom wall of the sludge collection tank, a pipe orifice of the flexible branch pipe is arranged at the bottom of the collection pit, and the collection port extends into the collection pit.

6. The device according to claim 5, wherein the flexible branch pipe comprises a flexible pipe body and a diffusion nozzle, the diffusion nozzle comprises a guide part, a mounting part and a diffusion part, the mounting part is connected with the flexible pipe body, a communication hole for communicating with the flexible pipe body is formed in the mounting part, the guide part is arranged on one side of the mounting part away from the flexible pipe body in parallel and at intervals, the diffusion part is connected with the mounting part and the periphery of the guide part, the diffusion part and the mounting part are arranged in an included angle, the mounting part, the diffusion part and the guide part define a diffusion cavity, a plurality of nozzles are formed in the diffusion part at intervals, and the guide part is parallel to the bottom wall of the collecting pit.

7. The device for air-lift sludge discharge of a sedimentation tank according to claim 6, wherein the cross section of the installation part is square, the guide part is in accordance with the shape and size of the installation part, the diffusion part is perpendicular to the installation part, and two nozzles are arranged at intervals along each side of the periphery of the installation part.

8. The lift-off sludge discharge apparatus of a sedimentation tank of claim 1, wherein a bottom wall cross section of a side of the sludge collection tank facing away from the collection end is arc-shaped.

9. The airlift sludge discharge apparatus of claim 1, wherein the sludge outlet is directed upward and a top side of the sludge outlet is provided with a sludge blanket disposed between both side walls of the sludge discharge channel.

10. The airlift sludge discharge apparatus of claim 1, further comprising a sludge scraping mechanism for scraping bottom sludge into a sludge collection tank.