Anaerobic floc sludge collecting system

Abstract

The utility model provides an anaerobic floc sludge collection system, which is characterized in that an inclined plate separation device is arranged in a sludge sedimentation tank, so that floc sludge in anaerobic effluent can be effectively separated and settled. In order to keep the flowability of the sludge, the system is particularly provided with a hydraulic stirring device, and a sludge-water mixture in the tank is used as a power source to continuously stir the floc sludge which is separated and settled at the bottom of the tank, so that the sludge is prevented from being deposited. The design not only is beneficial for sludge to flow back to the anaerobic unit, but also saves more space compared with the traditional reaction tank which needs to be provided with sludge discharging equipment such as a sludge scraper and the like. A backwashing device for regularly washing the inclined plate separation device is also arranged, so that the problem of blockage is avoided, and the sludge separation and collection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to an anaerobic flocculent sludge collection system. Background Technology

[0002] In existing anaerobic reactors (or anaerobic reaction tanks), flocculent sludge often cannot be completely retained. As the effluent flows out, the amount of sludge gradually decreases, directly leading to a significant decline in the reactor's anaerobic COD treatment capacity. To address this issue, a flocculent sludge collection system is typically installed to separate and recover sludge from the effluent. When a radial flow sedimentation tank is chosen as the flocculent sludge collection system, it suffers from drawbacks such as a large footprint and incomplete sludge collection. If an inclined plate sedimentation tank is chosen, a sludge hopper is required to collect the settled sludge, and a scraper must be installed to periodically remove the sludge from the hopper. If sludge is not cleaned in a timely manner, the sludge at the bottom of the tank may float back to the surface due to changes in water flow or agitation within the tank, thus affecting the effluent quality and causing it to decline. This additional treatment equipment also increases the operational complexity and investment cost of sludge collection. Utility Model Content

[0003] To address the problems of existing anaerobic reactors (anaerobic reaction tanks) such as large footprint, poor treatment efficiency, and increased system complexity due to additional sludge removal equipment, this invention provides an anaerobic flocculent sludge collection system. An inclined plate separation device is installed in the sludge sedimentation tank to effectively separate and settle the flocculent sludge carried in the anaerobic effluent. To maintain the sludge's suspension state, a hydraulic agitator is also included, using the sludge-water mixture as a power source to continuously agitate the separated and settled flocculent sludge, preventing further sedimentation. This design not only facilitates sludge return to the anaerobic unit for continued participation in the anaerobic treatment process but also, compared to traditional technologies that require additional sludge scrapers and other sludge removal devices in the reaction tank, occupies less space and achieves maximum sludge return.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anaerobic flocculent sludge collection system includes: several sludge sedimentation tanks, a hydraulic stirring pipe, and a sludge circulation pipe. The sludge sedimentation tanks are internally equipped with: an inclined plate separation device, a collection plate, and a flocculent sludge zone. The inclined plate separation device includes several spaced-apart inclined plates, with adjacent inclined plates forming channels for the flocculent sludge to descend. The collection plate is located at the bottom of the inclined plate separation device, and the collection plate slopes downwards from one end near the inclined plate separation device to the end furthest from it. The flocculent sludge separated by the inclined plates slides down the collection plate to the bottom of the sludge sedimentation tank. The space between the outer wall of the inclined plate separator, the outer wall of the collecting plate, and the inner wall of the sludge sedimentation tank forms the flocculent sludge zone. One end of the hydraulic stirring pipe extends into the flocculent sludge zone, and several small holes are provided on the pipe wall located within the flocculent sludge zone. Water is injected into the flocculent sludge zone through the small holes, and the resulting stirring force causes the separated flocculent sludge to suspend in the flocculent sludge zone. One end of the sludge circulation pipe is connected to the flocculent sludge zone, and the other end is connected to the upstream anaerobic unit to return the separated flocculent sludge to the anaerobic unit to continue participating in anaerobic treatment.

[0006] In some embodiments, the length of the collecting plate in the vertical direction is the same as the length of the sludge settling tank, and the bottom of the side wall of the inclined plate separation device is connected to the top of the collecting plate.

[0007] In some embodiments, the anaerobic flocculent sludge collection system further includes: an effluent trough and an inclined plate effluent pipe. The effluent trough is located at the top of the inclined plate separation device, and the inclined plate effluent pipe is connected to the effluent trough. Water after separating the flocculent sludge flows into the effluent trough and is then discharged from the sludge sedimentation tank through the inclined plate effluent pipe.

[0008] In some embodiments, the anaerobic flocculent sludge collection system further includes: an inlet unit, comprising an inlet, a main inlet channel, several inlet distribution channels, and several gate valves; the inlet is disposed on the sludge sedimentation tank to input water into the sludge sedimentation tank; the main inlet channel is connected to each of the inlet distribution channels, and each of the inlet distribution channels is connected to the inlet; a gate valve is disposed between the main inlet channel and each of the inlet distribution channels to control the flow of water between the main inlet channel and the inlet distribution channels.

[0009] In some embodiments, the anaerobic flocculent sludge collection system further includes: a backwashing device, the backwashing device including a blower, a backwash pipe and several backwashing branch pipes, the blower being connected to the backwash pipe to provide an air source for backwashing; one end of the backwashing branch pipe being connected to the backwash pipe, and the other end extending into the sludge sedimentation tank, corresponding one-to-one with the inclined plates of the inclined plate separation device, the water outlet direction of the backwashing branch pipe being the same as the inclination direction of the inclined plate.

[0010] In some embodiments, the backflush device further includes an air control valve disposed on the backflush pipe for controlling the on / off of the backflush air source.

[0011] In some embodiments, the anaerobic flocculent sludge collection system further includes a stirring power supply pipe, one end of which extends into the flocculent sludge zone and the other end is connected to the hydraulic stirring pipe, so as to transport the sludge-water mixture as a stirring power source to the hydraulic stirring pipe.

[0012] In some embodiments, the stirring power supply pipe is also equipped with a sludge circulation pump to provide power for extracting the flocculent sludge from the flocculent sludge zone.

[0013] In some embodiments, the sludge circulation pipe is connected to the stirring power supply pipe, and the sludge circulation pipe is equipped with a sludge return automatic control valve for controlling the sludge return process.

[0014] In some embodiments, the anaerobic flocculent sludge collection system further includes: an anaerobic effluent pipe and an aerobic influent pipe; the anaerobic effluent pipe is connected to the sludge sedimentation tank, and an inclined plate influent self-control valve is provided on the anaerobic effluent pipe; the aerobic influent pipe is connected to the anaerobic effluent pipe and the downstream aerobic unit respectively, and an aerobic influent self-control valve is provided on the aerobic influent pipe; by controlling the opening and closing of the inclined plate influent self-control valve and the aerobic influent self-control valve, the effluent from the anaerobic unit is controlled to enter the sludge sedimentation tank or the downstream aerobic unit.

[0015] Compared with the prior art, the anaerobic flocculent sludge collection system provided by this utility model has the following beneficial effects:

[0016] 1. The anaerobic flocculent sludge collection system provided by this utility model is equipped with an inclined plate separation device in the sludge sedimentation tank. The flocculent sludge separated by the inclined plate in the anaerobic effluent effectively settles to the bottom of the tank. The water flow input through the hydraulic stirring pipe agitates the settled flocculent sludge again, keeping it suspended in the flocculent sludge zone in the tank, thus avoiding sludge deposition. This part of the mud-water mixture can be extracted and converted into the stirring power source of the hydraulic stirring pipe and reintroduced into the tank. This design not only ensures that the sludge is reused to the anaerobic unit to the maximum extent, but also ensures the uniformity and stability of the returned sludge.

[0017] 2. Compared with the sludge scraper and other sludge removal devices configured in traditional reaction tanks, the hydraulic stirring device provided by this utility model reduces the space occupied. At the same time, it uses the mud-water mixture in the flocculent sludge zone as a power source to achieve energy self-sufficiency and reduce energy consumption. In addition, by optimizing the hydraulic flow design, the sludge settled in the tank is stirred in all directions, completely eliminating the sedimentation dead corners in the tank.

[0018] 3. In the design of the sludge sedimentation tank, this utility model abandons the traditional sludge hopper, which not only significantly reduces the civil engineering cost and construction complexity, but also the configured separation plate effectively prevents the settled flocculent sludge from entering the inclined plate separation device, thereby avoiding interference with the sludge separation and sedimentation process and further improving the separation efficiency.

[0019] 4. The anaerobic flocculent sludge collection system provided by this utility model has flexible water flow path switching and control capabilities. The anaerobic effluent can be guided to the sludge sedimentation tank as needed for effective sludge separation and recirculation, or it can flow directly to the downstream aerobic unit for further aerobic treatment.

[0020] 5. The anaerobic flocculent sludge collection system provided by this utility model greatly simplifies the manual operation process and significantly improves the system's operating efficiency by cleverly combining automatic control valves with intelligent programs. The sludge collection process is highly automated and easy to operate. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 A top view of the anaerobic flocculent sludge collection system provided by this utility model;

[0023] Figure 2 A side view of the sludge sedimentation tank 1 provided by this utility model;

[0024] Figure 3 This is another side view of the sludge sedimentation tank 1 provided by this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the hydraulic stirring tube 2 provided by this utility model.

[0026] Figure Labels

[0027] 1—Sludge sedimentation tank; 2—Hydraulic mixing pipe; 201—Small hole; 3—Sludge circulation pipe; 301—Sludge return automatic control valve; 4—Inclined plate; 5—Collection plate; 6—Flocculent sludge zone; 7—Mixing power supply pipe; 701—Sludge circulation pump; 8—Anaerobic effluent pipe; 801—Inclined plate inlet automatic control valve; 9—Aerobic inlet pipe; 901—Aerobic inlet automatic control valve; 10—Effluent trough; 11—Inclined plate effluent pipe; 12—Inlet; 13—Main inlet channel; 14—Inlet distribution channel; 15—Gate valve; 16—Blower; 17—Backflush pipe; 18—Backflush branch pipe; 19—Air automatic control valve. Detailed Implementation

[0028] The present invention will be further explained in detail below with reference to the accompanying drawings and specific embodiments. However, the following description of the embodiments is only intended to enable those skilled in the art to better understand the principles and essence of the present invention, and does not imply any limitation on the present invention.

[0029] This invention provides an anaerobic flocculent sludge collection system, such as... Figure 1-4 As shown, it includes: several sludge sedimentation tanks 1, hydraulic stirring pipes 2, and sludge circulation pipes 3. Inside the sludge sedimentation tanks 1, there are inclined plate separation devices 4, collection plates 5, and flocculent sludge zones 6. The inclined plate separation devices 4 include several inclined plates 4 arranged at intervals, and a channel for flocculent sludge to descend is formed between adjacent inclined plates 4. The collection plates 5 are located at the bottom of the inclined plate separation devices 4. The collection plates 5 are inclined downward from the end near the inclined plate separation devices 4 to the end away from the inclined plate separation devices 4. The flocculent sludge separated by the inclined plates 4 slides down the collection plates 5 to the bottom of the sludge sedimentation tank 1.

[0030] The space between the outer wall of the inclined plate 4 separation device, the outer wall of the collection plate 5, and the inner wall of the sludge sedimentation tank 1 constitutes the flocculent sludge zone 6.

[0031] One end of the hydraulic stirring pipe 2 extends into the flocculent sludge zone 6, and the pipe wall within the flocculent sludge zone 6 is provided with several evenly distributed small holes 201. Water flows through these small holes 201 and is injected into the flocculent sludge zone 6, allowing the separated flocculent sludge to remain suspended in the flocculent sludge zone 6 and maintain a uniform distribution. One end of the sludge circulation pipe 3 is connected to the flocculent sludge zone 6, while the other end is connected to the upstream anaerobic unit, returning the separated concentrated flocculent sludge to the anaerobic unit to continue participating in the anaerobic treatment process, maintaining the sludge balance of the anaerobic system, and ensuring the stable operation of the anaerobic unit.

[0032] Preferred, such as Figure 3 As shown, the hydraulic stirring pipe 2 includes a vertical section and a horizontal section. The horizontal section is set at the bottom of the sludge settling tank 1, and the vertical section is set near the side wall of the sludge settling tank 1. Small holes 201 can be set on both the vertical and horizontal sections to comprehensively stir the sludge in the vertical direction of the entire flocculent sludge zone 6 and prevent sedimentation.

[0033] Furthermore, such as Figure 2 and 3 As shown, the length of the collection plate 5 in the vertical direction is the same as the length of the sludge sedimentation tank 1, and the bottom of the side wall of the inclined plate 4 separation device is connected to the top of the collection plate 5.

[0034] As shown in the figure, due to the special design of the collection plate 5, the suspended flocculent sludge in the flocculent sludge zone 6 is effectively isolated, preventing it from entering the inclined plate 4 separation device, thus ensuring the purity of the sludge separation process and avoiding potential interference of suspended sludge with the separation efficiency.

[0035] In some embodiments, the system also provides a stirring power supply pipe 7 that provides stirring water flow to the hydraulic stirring pipe 2. One end of the stirring power supply pipe 7 extends into the flocculent sludge zone 6, and the other end is connected to the hydraulic stirring pipe 2, drawing mud-water mixture from the flocculent sludge zone 6 as a stirring power source and transporting it into the hydraulic stirring pipe 2.

[0036] Preferably, the stirring power supply pipe 7 is also equipped with a sludge circulation pump 701 to provide power for extracting flocculent sludge from the flocculent sludge zone 6.

[0037] More preferably, the stirring power supply pipe 7 is equipped with multiple suction ports in the pipe inside the tank, ensuring that the flocculent sludge extraction process can reach all areas and avoid the existence of dead zones.

[0038] Furthermore, the sludge circulation pipe 3 is connected to the stirring power supply pipe 7, and the sludge extracted by the stirring power supply pipe 7 can be directly sent to the upstream anaerobic unit through the sludge circulation pipe 3 to continue to participate in anaerobic treatment.

[0039] Preferably, the sludge circulation pipe 3 is equipped with a sludge return automatic control valve 301 for controlling the sludge return process.

[0040] In some embodiments, the anaerobic flocculent sludge collection system further includes: an effluent trough 10 and an inclined plate effluent pipe 11, wherein the effluent trough 10 is located at the top of the inclined plate 4 separation device, and the inclined plate effluent pipe 11 is connected to the effluent trough 10. The clear water after separating the flocculent sludge flows into the effluent trough 10 and is then discharged from the sludge sedimentation tank 1 through the inclined plate effluent pipe 11 and flows into the aerobic unit.

[0041] In some embodiments, the anaerobic flocculent sludge collection system also includes an inlet unit, which mainly includes several inlets 12, a main inlet channel 13, several inlet distribution channels 14, and several gate valves 15.

[0042] In this utility model, taking the setting of 3 water inlets 12 as an example, such as Figure 2 As shown, the inlet 12 is installed on the sludge sedimentation tank 1 to input water into the sludge sedimentation tank 1.

[0043] by Figure 1Taking the demonstrated configuration as an example, it includes two sludge sedimentation tanks 1. Correspondingly, the number of inlet distribution channels 14 should match the number of sludge sedimentation tanks 1. Each inlet distribution channel 14 is connected to its corresponding sludge sedimentation tank 1 via an inlet 12, ensuring proper water distribution. All inlet distribution channels 14 are connected to the main inlet channel 13, and a gate valve 15 is installed between the main inlet channel 13 and each inlet distribution channel 14. This allows for precise control of the water flow between the main inlet channel 13 and each inlet distribution channel 14, thus flexibly distributing the water entering each sludge sedimentation tank 1.

[0044] In some embodiments, the anaerobic flocculent sludge collection system further includes an anaerobic effluent pipe 8 and an aerobic influent pipe 9. The anaerobic effluent pipe 8 is connected to the sludge sedimentation tank 1, and the aerobic influent pipe 9 is connected to both the anaerobic effluent pipe 8 and the downstream aerobic unit. The anaerobic effluent pipe 8 and the aerobic influent pipe 9 are respectively equipped with an inclined plate influent automatic control valve 801 and an aerobic influent automatic control valve 901 to control the flow and flow rate of the fluid in the pipeline.

[0045] The effluent from the upstream anaerobic reactor (or reaction tank) flows into the anaerobic effluent pipe 8. By adjusting the opening and closing of the inclined plate inlet automatic control valve 801 and the aerobic inlet automatic control valve 901, the effluent flow path of the anaerobic unit can be precisely controlled.

[0046] If the inclined plate inlet automatic control valve 801 is opened and the aerobic inlet automatic control valve 901 is closed, the anaerobic effluent will flow by gravity to the sludge sedimentation tank 1; if the aerobic inlet automatic control valve 901 is opened and the inclined plate inlet automatic control valve 801 is closed, the anaerobic effluent will flow by gravity to the aerobic unit.

[0047] Furthermore, in the anaerobic flocculent sludge collection system equipped with the above-mentioned inlet unit, the anaerobic outlet pipe 8 is connected to the main inlet channel 13. According to the treatment requirements, the water flow is distributed to the inlet distribution channel 14 connected to each sludge sedimentation tank 1 by adjusting the gate valve 15.

[0048] In some embodiments, the anaerobic flocculent sludge collection system is equipped with a dedicated backwashing device for cleaning the inclined plate 4 separation unit. This device includes a blower 16, a backwash pipe 17, and multiple backwash branch pipes 18. The blower 16 is connected to the backwash pipe 17 to provide a flushing air source for the backwashing process. One end of each backwash branch pipe 18 is connected to the backwash pipe 17, and the other end extends into the sludge settling tank 1, corresponding to each inclined plate 4 of the inclined plate 4 separation unit. The effluent direction of these backwash branch pipes 18 is consistent with the inclination direction of the inclined plate 4, such as... Figure 2 As shown in the example, the outlet of the backwash branch pipe 18 is located at the top of the inclined plate 4, which ensures that the flushing airflow can flow along the surface of the inclined plate 4, effectively remove the sludge deposits on the inclined plate 4, and maintain the efficient operation of the inclined plate 4 separation device.

[0049] Furthermore, an air control valve 19 for controlling the on / off of the backflush air source is also provided on the backflush pipe 17.

[0050] It should be noted that the hydraulic mixing pipe 2, mixing power supply pipe 7, backflush pipe 17 and backflush branch pipe 18 mentioned above are all conventional perforated pipes, all equipped with quick-connect fittings. When the pipes malfunction, they can be directly disassembled and replaced without emptying the tank for maintenance.

[0051] In some implementations, this anaerobic flocculent sludge collection system is highly automated, equipped with an intelligent controller connected to the control of each valve and pump. This controller incorporates specialized operating and backwashing programs, automatically adjusting and optimizing various system operations to ensure the efficiency and stability of the entire sludge collection process. This automated control method not only significantly improves operational convenience but also reduces manual intervention, guaranteeing the long-term reliability of the system's stable operation.

[0052] In summary, the treatment process of flocculent sludge by this anaerobic flocculent sludge collection system is briefly described as follows:

[0053] The effluent from the upstream anaerobic unit flows into the anaerobic effluent pipe 8, then the inclined plate inlet automatic control valve 801 is opened and the aerobic inlet automatic control valve 901 is closed, and the effluent is guided to the main inlet channel 13. According to the treatment needs of each sludge settling tank 1, the water flow is distributed to the connected inlet distribution channel 14. After entering the sludge settling tank 1, the flocculent sludge in the water is separated by the inclined plate 4 and settles to the bottom of the tank along the collection plate 5. Under the action of the hydraulic stirring pipe 2, these flocculent sludge particles are agitated and suspended in the flocculent sludge zone 6 within the tank.

[0054] The sludge circulation pump 701 continuously draws the sludge-water mixture from the flocculent sludge zone 6 and uses it as the input hydraulic stirring pipe 2 to continuously agitate the flocculent sludge zone 6. When the sludge return automatic control valve 301 is opened, the concentrated flocculent sludge in the flocculent sludge zone 6 is returned to the anaerobic unit through the sludge return pipe to achieve sludge recycling.

[0055] After a period of operation, the backwashing procedure of sludge sedimentation tank 1 is started: First, the air control valve 19 and blower 16 are turned on, so that air flows into each backwash branch pipe 18 through the backwash pipe 17 to thoroughly wash the inclined plate 4 in the inclined plate 4 sedimentation device, wash down the sediment attached to the inclined plate 4, and let it settle back into the flocculent sludge zone 6, thereby preventing the inclined plate 4 sedimentation device from becoming blocked.

[0056] During backwashing, open the aerobic inlet automatic control valve 901 and simultaneously close the inclined plate inlet automatic control valve 801 to ensure that the anaerobic effluent flows directly to the aerobic unit, thus avoiding interference with the backwashing effect. After backwashing is complete, close the aerobic inlet automatic control valve 901 and reopen the inclined plate inlet automatic control valve 801 to restore the normal operation of the anaerobic flocculent sludge collection system.

[0057] The preferred embodiment of this utility model is provided as an inspiration. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model.

[0058] The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An anaerobic flocculent sludge collection system, characterized in that, include: Several sludge sedimentation tanks, hydraulic mixing pipes, and sludge circulation pipes. The sludge sedimentation tank is equipped with: an inclined plate separation device, a collection plate, and a flocculent sludge zone. The inclined plate separation device includes several inclined plates arranged at intervals, with channels formed between adjacent inclined plates for the sludge flocs to descend. The collecting plate is located at the bottom of the inclined plate separation device. The collecting plate is inclined downward from one end near the inclined plate separation device to the other end away from the inclined plate separation device. The flocculent sludge separated by the inclined plate slides down the collecting plate to the bottom of the sludge sedimentation tank. The space between the outer wall of the inclined plate separation device, the outer wall of the collection plate, and the inner wall of the sludge sedimentation tank forms the flocculent sludge zone; One end of the hydraulic stirring pipe extends into the flocculent sludge zone, and several small holes are provided on the pipe wall located in the flocculent sludge zone. Water is injected into the flocculent sludge zone through the small holes, and the resulting stirring force causes the separated flocculent sludge to suspend in the flocculent sludge zone. One end of the sludge circulation pipe is connected to the flocculent sludge zone, and the other end is connected to the upstream anaerobic unit, so that the separated flocculent sludge can be returned to the anaerobic unit to continue to participate in anaerobic treatment.

2. The anaerobic flocculent sludge collection system according to claim 1, characterized in that, The length of the collection plate in the vertical direction is the same as the length of the sludge sedimentation tank. The bottom of the side wall of the inclined plate separation device is connected to the top of the collecting plate.

3. The anaerobic flocculent sludge collection system according to claim 1, characterized in that, Also includes: Water outlet trough and inclined plate water outlet pipe, The effluent trough is located at the top of the inclined plate separation device, and the inclined plate effluent pipe is connected to the effluent trough. The water after separating the flocculent sludge flows into the effluent trough and is then discharged from the sludge sedimentation tank through the inclined plate effluent pipe.

4. The anaerobic flocculent sludge collection system according to claim 1, characterized in that, It also includes: water intake unit, including water inlet, main water intake channel, several water intake distribution channels, and several gate valves; The inlet is located on the sludge sedimentation tank to input water into the sludge sedimentation tank; The main water intake channel is connected to each of the water intake distribution channels, and each of the water intake distribution channels is connected to the water inlet; A gate valve is installed between the main water intake channel and each of the water intake distribution channels to control the flow of water between the main water intake channel and the water intake distribution channels.

5. The anaerobic flocculent sludge collection system according to claim 1, characterized in that, Also includes: Backwashing device, The backwashing device includes a blower, a backwash pipe, and several backwash branch pipes. The blower is connected to the backwash pipe to provide the air source for backwashing; One end of the backwash branch pipe is connected to the backwash pipe, and the other end extends into the sludge sedimentation tank. It is set up one-to-one with the inclined plate of the inclined plate separation device. The water outlet direction of the backwash branch pipe is the same as the inclination direction of the inclined plate.

6. The anaerobic flocculent sludge collection system according to claim 5, characterized in that, The backwashing device also includes an air control valve installed on the backwash pipe for controlling the on / off of the backwash air source.

7. The anaerobic flocculent sludge collection system according to claim 1, characterized in that, It also includes: the stirring power supply pipe, One end of the stirring power supply pipe extends into the flocculent sludge zone, and the other end is connected to the hydraulic stirring pipe to deliver the mud-water mixture as a stirring power source to the hydraulic stirring pipe.

8. The anaerobic flocculent sludge collection system according to claim 7, characterized in that, The stirring power supply pipe is also equipped with a sludge circulation pump to provide power for extracting the flocculent sludge from the flocculent sludge zone.

9. The anaerobic flocculent sludge collection system according to claim 7, characterized in that, The sludge circulation pipe is connected to the stirring power supply pipe, and the sludge circulation pipe is equipped with a sludge return automatic control valve for controlling the sludge return process.

10. The anaerobic flocculent sludge collection system according to any one of claims 1-9, characterized in that, It also includes: anaerobic effluent pipe and aerobic influent pipe; The anaerobic effluent pipe is connected to the sludge sedimentation tank, and the anaerobic effluent pipe is equipped with an inclined plate inlet automatic control valve. The aerobic water inlet pipe is connected to the anaerobic water outlet pipe and the downstream aerobic unit, and the aerobic water inlet pipe is equipped with an aerobic water inlet self-control valve; By controlling the opening and closing of the inclined plate inlet automatic control valve and the aerobic inlet automatic control valve, the effluent from the anaerobic unit can be controlled to enter the sludge sedimentation tank or the downstream aerobic unit.

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