Integrated sedimentation tank

Abstract

The utility model relates to an integrated sedimentation tank, which is characterized in that the side wall of a sedimentation tank body of the integrated sedimentation tank is provided with a water passing hole, an inclined tube filler is arranged in the sedimentation tank body, and a water outlet groove for leading clear water out of the sedimentation tank body is arranged on the upper side of the inclined tube filler in the sedimentation tank body. A big-end-up sludge hopper is arranged on the lower side of the inclined tube filler on the sedimentation tank body, a sludge settling opening is formed in the bottom of the sludge hopper, a sludge falling hopper with the upper end communicated with the sludge settling opening and the lower end communicated with the aerobic tank is arranged at the bottom of the sedimentation tank body, and a sludge falling opening deviating to one side of the sludge settling opening is formed in the bottom of the sludge falling hopper; and an air release port located right above the sludge falling port is formed between the side wall of the sludge falling hopper and the side wall of the sludge settling hopper. According to the utility model, the technical problem that the whole sewage treatment tank occupies a large space because the sedimentation tank is arranged on the outer side of the aerobic tank in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an integrated sedimentation tank. Background Art

[0002] The prevention and control of water pollution has become a key content of environmental pollution prevention and control in China. In sewage treatment, traditional A-O (anaerobic-aerobic) and A-A-O (anaerobic-anoxic-aerobic) processes are the simplest biological chemical systems for nitrogen and phosphorus removal with the widest application at present. The existing sewage treatment equipment using the AAO process, such as the treatment tank disclosed in "Integrated Sewage Treatment Tank and Sewage Treatment Method for Improving AAO" disclosed in Chinese Patent CN104891656B, includes an anaerobic phosphorus removal area, a low-oxygen aeration area, an enhanced aeration area, and a sedimentation area that are adjacent to each other in sequence, integrally arranged, and separated by partition walls; water flow channels are respectively arranged on each partition wall; the anaerobic phosphorus removal area is divided into a first anaerobic phosphorus removal area and a second anaerobic phosphorus removal area by a first partition wall, and water flow channels are respectively arranged at both ends of the first partition wall, and a push-flow stirring device is arranged at the wastewater inlet end of the first anaerobic phosphorus removal area and at one end of the second anaerobic phosphorus removal area far from the wastewater inlet end; the low-oxygen aeration area is divided into a first low-oxygen aeration area and a second low-oxygen aeration area by a second partition wall, water flow channels are respectively arranged at both ends of the second partition wall, and an air push-flow area is arranged at the inlet end of the first low-oxygen aeration area; the sedimentation area is communicated with the anaerobic phosphorus removal area through a sludge return channel; an air pusher is arranged in the air push-flow area; the air push-flow area and the first low-oxygen aeration area are separated by a partition wall.

[0003] The first low-oxygen aeration area and the second low-oxygen aeration area are anaerobic areas, and the enhanced aeration area is an aerobic area. In the anaerobic area, microorganisms are used to absorb and degrade COD, ammonia nitrogen, TN, and TP, and at the same time, nitrification reaction and denitrification reaction are carried out, so as to effectively remove some refractory organic matters and improve the removal efficiency of organic matters. In the aerobic area, the absorption of phosphorus by microorganisms can be improved, and the removal efficiency of phosphorus can be improved. The mixed liquid treated in the aerobic area enters the sedimentation area for mud-water separation. Part of the separated sludge is refluxed to the anaerobic area and the aerobic area, and part is recovered and treated. The refluxed sludge is used to adjust the sludge concentration in the corresponding tank, and the ammonia nitrogen in the sludge can be effectively reintroduced into the biological reaction to increase the removal efficiency of suspended solids and organic matters.

[0004] The problem of the existing sewage treatment device is that the sedimentation area is arranged outside the aerobic area, so the sedimentation area itself will occupy a large land space. For many old sewage treatment plants, the land is very tight, and there are great restrictions on the size of newly built tank bodies. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide an integrated sedimentation tank, so as to solve the technical problem that the sedimentation tank is arranged outside the aerobic tank in the prior art, resulting in a large occupied space for the entire sewage treatment tank.

[0006] To solve the above technical problem, the technical solution of an integrated sedimentation tank in the present utility model is as follows:

[0007] An integrated sedimentation tank includes a sedimentation tank body used to be placed in the aerobic tank during use. There are water passing holes provided on the side wall of the sedimentation tank body. A water distribution channel with its bottom connected to the water passing holes is arranged outside the water passing holes on the sedimentation tank body. The upper end of the water distribution channel is a water distribution channel water inlet communicating with the aerobic tank. Inside the sedimentation tank body, there is inclined tube packing. Above the inclined tube packing in the sedimentation tank body, there is a water outlet trough for leading clear water out of the sedimentation tank body. Below the inclined tube packing on the sedimentation tank body, there is a sludge hopper with a larger upper part and a smaller lower part. The bottom of the sludge hopper is a sedimentation opening. The bottom of the sedimentation tank body has a sludge dropping hopper with its upper end communicating with the sedimentation opening and its lower end communicating with the aerobic tank. The bottom of the sludge dropping hopper is a sludge dropping opening biased towards one side of the sedimentation opening. Between the side wall of the sludge dropping hopper and the side wall of the sedimentation hopper, there is an air release opening located directly above the sludge dropping opening.

[0008] Further, the length of the sedimentation tank body extends in the left - right direction, the width of the sedimentation tank body extends in the front - back direction. The water distribution channel is located on the left side of the sedimentation tank body. The water passing opening is arranged on the left side wall of the sedimentation tank body. The length of the sedimentation opening extends in the left - right direction. The length of the sludge dropping opening extends in the left - right direction. The length of the water outlet trough extends in the left - right direction.

[0009] Further, the sludge dropping opening is located in front of the sedimentation opening.

[0010] Further, the widths of the sludge dropping opening and the air release opening are less than one - half of the width of the sedimentation opening.

[0011] Further, the front side wall of the sludge hopper is a movable wall with its upper end hinged to the sedimentation tank body. The hinge axis of the movable wall extends in the left - right direction. An active wall driving mechanism for driving the movable wall to swing around its hinge axis is arranged between the movable walls of the sludge dropping hopper. The rear side wall of the sludge hopper is a fixed wall with its upper end fixedly connected to the sedimentation tank body. A sludge discharge opening extending in the left - right direction is arranged on the fixed wall. A sludge discharge door capable of being opened and closed is arranged at the sludge discharge opening. The sedimentation tank body further includes a vertical side wall located behind the fixed wall. The left and right ends of the fixed wall and the vertical side wall are respectively provided with a left side wall and a right side wall. The fixed wall, the vertical side wall, the left side wall and the right side wall enclose a sludge discharge space. A sludge discharge auger with its axis extending in the left - right direction is arranged in the sludge discharge space. A sludge discharge trough is arranged on the right side of the sludge discharge auger. The integrated sedimentation tank further includes a sludge discharge pump connected to the sludge discharge trough through a sludge discharge pipeline.

[0012] Further, the sludge discharge auger includes an auger housing and an auger shaft disposed within the auger housing with a rotation axis extending in the left-right direction. The auger shaft is provided with spiral conveying blades. The upper end of the auger housing is provided with a housing sludge inlet extending in the left-right direction and communicating with the sludge discharge port. The front and rear sides of the auger housing are respectively fixedly and sealingly connected to the fixed wall and the vertical side wall.

[0013] Further, the movable wall is a telescopic movable wall with adjustable length. The movable wall includes a first part of the movable wall and a second part of the movable wall that is in guiding and moving cooperation with the first part of the movable wall. A length adjustment cylinder for driving the second part of the movable wall to expand and contract relative to the first part of the movable wall is provided between the first part of the movable wall and the second part of the movable wall.

[0014] The beneficial effects of the present utility model are as follows: The sedimentation tank in the present utility model is arranged inside the aerobic tank rather than outside the aerobic tank. Therefore, the floor space of the entire sewage treatment tank can be reduced. During specific use, the sewage in the aerobic tank enters the interior of the integrated sedimentation tank through the distribution channel and the water passing holes. The sludge is separated from the water and mud through the inclined tube packing. The clear water is collected by the water outlet trough on the upper side and flows into the next unit. The sludge naturally settles to the sludge hopper, and is again concentrated and collected to the sludge dropping port through the sedimentation mud port. The gravity of the concentrated sludge is greater than the buoyancy generated by the bubbles of the aeration device. Therefore, the sludge sinks to the aerobic tank through the sludge dropping port. In order to prevent the bubbles generated by the aeration device from rising and affecting the water and mud separation effect, an air release port is provided on the upper side of the sludge dropping port. The bubbles can be discharged from the integrated sedimentation tank through the air release port, and the bubbles will not affect the water and mud separation in the sludge hopper. Description of the Drawings

[0015] By referring to the accompanying drawings and reading the detailed description below, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0016] Figure 1 is the usage state diagram of Embodiment 1 of an integrated sedimentation tank in the present utility model;

[0017] Figure 2 is Figure 1 the distribution schematic diagram of each integrated sedimentation tank in the aerobic tank;

[0018] Figure 3 is Figure 1 the top view of the integrated sedimentation tank in

[0019] Figure 4 is Figure 3 the sectional view taken along the 1-1 direction of

[0020] Figure 5 is Figure 3Cross-sectional view taken along line 2-2;

[0021] Figure 6 It is a schematic structural diagram of Embodiment 2 of an integrated sedimentation tank in the present utility model;

[0022] Figure 7 is Figure 6 A schematic diagram of the cooperation between the middle sludge discharge auger and the sludge discharge trough;

[0023] Figure 8 is Figure 6 An enlarged view of Area A in;

[0024] Figure 9 is Figure 6 An enlarged view of Area B in;

[0025] 1. Anaerobic tank; 2. Aerobic tank; 3. Integrated sedimentation tank; 4. Outlet trough; 5. Outlet pipe; 6. Aeration device; 7. Bubbles generated by the aeration device; 8. Sedimentation tank body; 9. Inclined tube packing; 10. Sludge hopper; 11. Mud dropping hopper; 12. Sludge settling port; 13. Mud dropping port; 14. Gas release port; 15. Liquid level line; 16. Diversion wall; 17. Water distribution channel; 18. Clear water layer; 19. Front side wall of the mud dropping hopper; 20. Rear side wall of the mud dropping hopper; 21. Right side wall; 22. Movable wall; 23. Fixed wall; 24. Vertical side wall; 25. Sludge discharge port; 26. Sludge discharge door; 27. Gear; 28. Sludge discharge auger; 29. Sludge discharge space; 30. Auger housing; 31. Screw conveyor blade; 32. Housing sludge inlet; 33. Auger motor; 34. Auger shaft; 35. Sludge discharge trough; 36. Sludge discharge pipeline; 37. Length adjustment cylinder; 38. Flip adjustment cylinder; 39. First part of the movable wall; 40. Second part of the movable wall; 41. Connecting rod; 42. Connecting rod avoidance long hole; 43. Water passing opening. Detailed implementation manners

[0026] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive.

[0027] It should be noted that unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model.

[0028] Embodiment 1 of an integrated sedimentation tank in the present utility model is as shown in Figures 1 - 5As shown in the figure: The sewage treatment tank includes an anaerobic tank 1 and an aerobic tank 2 arranged left and right. Inside the aerobic tank 2, there are four integrated bottom sedimentation tanks 3 arranged at intervals in the front-rear direction. The integrated sedimentation tank 3 includes a sedimentation tank body 8. The upper end of the sedimentation tank body 8 is supported and fixed on the edge of the aerobic tank. An aeration device 6 is arranged at the bottom of the aerobic tank. The length directions of both the anaerobic tank and the aerobic tank extend in the front-rear direction.

[0029] The structures of each integrated sedimentation tank are the same. The length of the sedimentation tank body extends in the left-right direction, and the width of the sedimentation tank body extends in the front-rear direction.

[0030] When in use, the sedimentation tank body 8 of the integrated sedimentation tank is used to be placed in the aerobic tank. The left side wall of the sedimentation tank body forms a diversion wall 16. A water baffle is arranged on the left side of the diversion wall 16. A water distribution channel 17 is formed between the water baffle and the diversion wall. A water passing opening 43 is arranged on the diversion wall 16. The lower end of the water distribution channel is communicated with the water passing opening, and the upper end of the water distribution channel is a water distribution channel water inlet communicated with the aerobic tank.

[0031] Inside the sedimentation tank body, there is inclined tube packing 9. Above the inclined tube packing in the sedimentation tank body, there is a water outlet tank 4 for guiding clear water out of the sedimentation tank body. The length of the water outlet tank extends in the left-right direction. The water outlet tanks of each integrated sedimentation tank are connected in parallel to the same water outlet pipe 5. In the figure, item 18 represents the clear water layer, and item 15 represents the liquid level line of the clear water layer. The clear water can flow to the water outlet pipe through the water outlet tank.

[0032] Below the inclined tube packing on the sedimentation tank body, there is a sludge hopper 10 with a large upper part and a small lower part. The bottoms of the front and rear side walls of the sludge hopper approach each other. The bottom of the sludge hopper is a sedimentation opening 12. The sludge in the sludge hopper converges and concentrates under the action of sedimentation due to the action of the front and rear side walls of the sludge hopper.

[0033] At the bottom of the sedimentation tank body, there is a sludge dropping hopper 11 with its upper end communicated with the sedimentation opening and its lower end communicated with the aerobic tank. The bottom of the sludge dropping hopper is a sludge dropping opening 13 biased towards one side of the sedimentation opening. An air release opening 14 is formed between the side wall of the sludge dropping hopper and the side wall of the sedimentation hopper and is located directly above the sludge dropping opening. In this embodiment, the sludge dropping opening is located in front of the sedimentation opening, and the sludge dropping opening is a slit-like structure with its length extending in the left-right direction. The widths of the sludge dropping opening and the air release opening are less than half of the width of the sedimentation opening. When in use, the bubbles generated by the aeration device pass through the sludge dropping opening from top to bottom and then are discharged from bottom to top through the air release opening. The bubbles generated by the aeration device will not enter the sedimentation opening and will not affect the convergence and concentration of the sludge at the sedimentation opening position. The sludge that has converged and concentrated slides down along the rear side wall of the sludge dropping hopper to the sludge dropping opening position. The weight of the sludge that has converged and concentrated is greater than the buoyancy of the bubbles generated by the aeration device. Therefore, it can fall into the aerobic tank through the sludge dropping opening, which is equivalent to realizing the sludge reflux without the need to rely on a reflux device.

[0034] The designed surface loading of the integrated sedimentation tank is 1.2 - 3.5 m³ / ㎡.h.

[0035] The designed inclination angle of the inclined tube packing is 60°, and the designed vertical height is 0.866 - 1.5 m.

[0036] The effluent trough is arranged along the length direction of the integrated sedimentation tank to uniformly collect clear water.

[0037] The length-width ratio of the integrated sedimentation tank should meet 1:2 - 1:4. The water distribution channel is set on the side with the shorter length of the sedimentation tank. The flow velocity of the water passing through the holes at the bottom of the diversion wall should be ≤ 0.3 m / s. The low flow velocity increases the water distribution uniformity.

[0038] The inclination angles of the front and rear side walls of the sludge hopper are set at 45° - 60°. The flow velocity at the sludge settling port below the sludge hopper should be guaranteed to be ≤ 0.1 m / s. The sludge settling port is a through-port arranged along the length direction of the sedimentation tank.

[0039] The connecting side wall from the sludge settling port to the sludge discharging port must be inclined to one side. It is necessary to ensure that the bottom of the rear side wall of the sludge discharging hopper exceeds the width of the sludge settling port by ≥ 30 cm to prevent air bubbles from rising to the sludge settling port and disturbing the sludge hopper area. The inclination angle of the rear side wall of the sludge discharging hopper is 45° - 60°.

[0040] In the present utility model, the sewage flow direction is to first enter the anaerobic tank, and then enter the aerobic tank, also called the aeration tank. According to needs, an appropriate number of integrated sedimentation tanks are placed in the aerobic tank to achieve sludge sedimentation. This can not only reduce the occupied space of the entire sewage treatment tank, but also directly settle the sludge into the aerobic tank, reducing the energy consumption of sludge reflux. According to different treatment scales, multiple sets of integrated sedimentation tanks can be connected in parallel, which is applicable to small-scale and large-scale sewage treatment facilities. The two-stage sedimentation areas of the sludge hopper and the sludge discharging hopper improve the sedimentation efficiency. The air bubbles entering through the sludge discharging port are discharged through the air release port. The air release port can reduce the disturbance of air bubbles to the sludge settling port and ensure the smooth convergence and concentration of sludge in the sludge hopper.

[0041] An embodiment 2 of an integrated sedimentation tank is as Figures 6 - 9 shown:

[0042] The difference between embodiment 2 and embodiment 1 is:

[0043] In embodiment 1, the sludge generated by the integrated sedimentation tank is continuously discharged into the aerobic tank, which may cause the sludge level in the aerobic tank to be too high. To solve this problem, in this embodiment,

[0044] The front side wall of the sludge hopper is a movable wall 22 whose upper end is hinged to the sedimentation tank body. The hinge axis of the movable wall 22 extends in the left-right direction. An actuating mechanism for the movable wall is provided between the sludge hopper and the movable wall to drive the movable wall to swing around its hinge axis. The actuating mechanism for the movable wall is a tilting adjustment cylinder 38. One end of the tilting adjustment cylinder is hinged to the sludge hopper 11, and the other end of the tilting adjustment cylinder is hinged to the movable wall. When the piston rod of the tilting adjustment cylinder extends, the movable wall tilts backward. In this embodiment, the movable wall is a telescopic movable wall with adjustable length. The movable wall includes a first part 39 of the movable wall and a second part 40 of the movable wall that is in guiding and moving cooperation with the first part of the movable wall. The upper end of the first part of the movable wall is hinged to the sedimentation tank body, and the tilting adjustment cylinder is hinged to the first part of the movable wall. A length adjustment cylinder 37 is provided between the first part of the movable wall and the second part of the movable wall to drive the second part of the movable wall to expand and contract relative to the first part of the movable wall. The telescopic direction of the piston rod of the length adjustment cylinder is the same as the moving direction of the second part of the movable wall. The piston rod of the length adjustment cylinder is connected to the second part of the movable wall through a connecting rod 41. A long hole 42 for avoiding the connecting rod is provided at the lower end of the first part of the movable wall. When the piston rod of the length adjustment cylinder extends, the second part of the movable wall can extend out of the first part of the movable wall, thereby increasing the length of the entire movable wall.

[0045] The rear side wall of the sludge hopper is a fixed wall 23 whose upper end is fixedly connected to the sedimentation tank body. A sludge discharge port 25 extending in the left-right direction is provided on the fixed wall 23. A sludge discharge door 26 that can be opened and closed is provided at the sludge discharge port 25. Specifically, the sludge discharge door 26 is assembled on the sedimentation tank body in a guiding and moving manner. A sludge discharge door driving motor is provided on the sedimentation tank body. A gear 27 is connected to the power output end of the sludge discharge door driving motor. A rack that meshes with the gear is provided at the rear side of the upper end of the sludge discharge door. The gear transmission can drive the sludge discharge door to move up and down. When the sludge discharge door moves upward, the sludge discharge port can be opened. When the sludge discharge door moves downward, the sludge discharge port can be closed.

[0046] The sedimentation tank body further includes a vertical side wall 24 located behind the fixed wall. The left and right ends of the fixed wall 23 and the vertical side wall 24 are respectively provided with a left side wall and a right side wall. The fixed wall, the vertical side wall, the left side wall, and the right side wall enclose a sludge discharge space 29. A sludge discharge auger 28 whose axis extends in the left-right direction is provided in the sludge discharge space 29. A sludge discharge trough 35 is provided on the right side of the sludge discharge auger. The integrated sedimentation tank further includes a sludge discharge pump connected to the sludge discharge trough 35 through a sludge discharge pipeline 36. The sludge discharge auger includes an auger housing and an auger shaft 34 whose rotation axis extends in the left-right direction and is provided in the auger housing. A spiral conveyor blade 31 is provided on the auger shaft 34. The upper end of the auger housing is provided with a housing sludge inlet 32 extending in the left-right direction and communicating with the sludge discharge port. The front and rear sides of the auger housing are respectively sealed and fixedly connected to the fixed wall and the vertical side wall. The auger shaft is driven by an auger motor 33.

[0047] During normal use, such as Figure 6 shown, the sludge discharge gate closes the sludge discharge port, the second part of the movable wall of the movable wall is in the retracted state, and the sludge normally falls into the aerobic tank through the sedimentation port and the mud dropping port. When the sludge concentration in the aerobic tank is relatively high, the second part of the movable wall of the movable wall extends, and the movable wall driving mechanism drives the whole movable wall to turn backward, the sludge discharge gate moves upward to open the sludge discharge port, the sludge in the sludge hopper is guided to the sludge discharge port through the movable wall, and the sludge enters the auger housing through the sludge discharge port and the housing sludge inlet. The auger shaft drives the spiral conveying blade to rotate to convey the sludge from left to right to the sludge discharge trough, and the sludge pump discharges the sludge in the sludge discharge trough to avoid excessive sludge concentration in the aerobic tank.

[0048] In the above description of this specification, unless otherwise clearly specified and limited,

[0049] terms such as "fixed", "installed", "connected" or "coupled" should be understood in a broad sense. For example, for the term "connected", it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components or the interaction relationship between two components. Therefore, unless otherwise clearly limited in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to specific situations.

[0050] According to the above description of this specification, those skilled in the art can also understand the terms used as follows. For example, terms indicating orientation or position relationship such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" are based on the orientation or position relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of this utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or component involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above orientation or position relationship terms cannot be understood or interpreted as a limitation to the solution of this utility model.

[0051] In addition, the terms "first" or "second" etc. used in this specification to refer to numbers or ordinals are only for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the present invention in each embodiment.

Claims

1. Integrated sedimentation tank, characterized in that: The utility model comprises a sedimentation tank body which is used to be placed in an aerobic tank when in use, wherein a water hole is arranged on the side wall of the sedimentation tank body, a water distribution channel whose bottom is connected to the water hole is arranged on the outside of the water hole on the sedimentation tank body, the upper end of the water distribution channel is a water inlet of the water distribution channel which is communicated with the aerobic tank, an inclined tube filler is arranged inside the sedimentation tank body, an outlet trough which is used to guide clean water out of the sedimentation tank body is arranged on the upper side of the inclined tube filler in the sedimentation tank body, a sludge hopper which is larger at the top and smaller at the bottom is arranged on the lower side of the inclined tube filler on the sedimentation tank body, the bottom of the sludge hopper is a sludge settling port, the bottom of the sedimentation tank body has a sludge drop hopper which is communicated with the sludge settling port at the upper end and communicated with the aerobic tank at the lower end, the bottom of the sludge drop hopper is a sludge drop port which is biased to one side of the sludge settling port, and a gas release port which is located just above the sludge drop port is formed between the side wall of the sludge drop hopper and the side wall of the sludge drop hopper.

2. The integrated sedimentation tank according to claim 1, characterized in that: The length of the sedimentation tank body is extended along the left-right direction, the width of the sedimentation tank body is extended along the front-back direction, the water distribution channel is located on the left side of the sedimentation tank body, the water outlet is arranged on the left side wall of the sedimentation tank body, the length of the mud settling port is extended along the left-right direction, the length of the mud discharge port is extended along the left-right direction, and the length of the water outlet trough is extended along the left-right direction.

3. The integrated sedimentation tank according to claim 2, characterized in that: The mud outlet is located in front of the mud settling outlet.

4. The integrated sedimentation tank according to claim 1, wherein: The width of the mud outlet and the air release outlet is less than half of the width of the mud settling outlet.

5. The integrated sedimentation tank according to any one of claims 1 to 4, characterized in that: The front side wall of the mud hopper is a movable wall whose upper end is hingedly connected to the sedimentation tank body, and the hinge axis of the movable wall is extended in the left and right directions. A movable wall driving mechanism for driving the movable wall to swing around its hinge axis is arranged between the mud hopper and the movable wall. The rear side wall of the mud hopper is a fixed wall whose upper end is fixedly connected to the sedimentation tank body, and a mud discharge port extending in the left and right directions is arranged on the fixed wall, and a mud discharge door that can be opened and closed is arranged at the mud discharge port. The sedimentation tank body also includes a vertical side wall located on the rear side of the fixed wall, and the left and right ends of the fixed wall and the vertical side wall are respectively provided with a left wall and a right wall. The fixed wall, the vertical side wall, the left wall and the right wall enclose a mud discharge space, and a mud discharge auger with an axis extending in the left and right directions is arranged in the mud discharge space, and a mud discharge trough is arranged on the right side of the mud discharge auger. The integrated sedimentation tank also includes a mud discharge pump connected to the mud discharge trough through a mud discharge pipeline.

6. The integrated sedimentation tank according to claim 5, wherein: The mud discharge auger includes an auger shell and an auger shaft with a rotating axis arranged in the auger shell and extending along the left-right direction, the auger shaft is provided with spiral conveying blades, and the upper end of the auger shell is provided with a shell sludge inlet extending along the left-right direction and communicating with the mud discharge port, and the front and rear sides of the auger shell are respectively sealed and fixedly connected to the fixed wall and the vertical side wall.

7. The integrated sedimentation tank according to claim 5, characterized in that: The movable wall is a telescopic movable wall with adjustable length. The movable wall includes a first movable wall part and a second movable wall part that cooperates with the first movable wall part in guiding movement. A length adjustment cylinder is arranged between the first movable wall part and the second movable wall part to drive the second movable wall part to extend and retract relative to the first movable wall part.

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