Sludge in-situ reduction device and method based on A2O process

Abstract

The invention discloses a sludge in-situ reduction device based on an A2O process, which is characterized by comprising: a waste liquid treatment box, which is provided with a reaction chamber; a plurality of inorganic sludge precipitation pits are arranged at the bottom of the waste liquid treatment box; an outlet of the water distribution pipe extends into the reaction cavity; a suction port and a discharge port of the sludge discharge pipe are respectively communicated with the inorganic sludge settling pit and the external environment; the rotary filtering device comprises a vertical rotary power mechanism and an intercepting plate, and the intercepting plate is arranged in the reaction cavity and located below an outlet of the water distribution pipe; the vertical rotating power mechanism is in transmission connection with the intercepting plate and can drive the intercepting plate to rotate so as to change the included angle relative to the horizontal plane.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an in-situ sludge reduction device and method based on an A2O process. Background Art

[0002] The A2O process is an anaerobic-anoxic-aerobic combined process that achieves simultaneous nitrogen and phosphorus removal through phosphorus release, denitrification and nitrification. Sludge return and mixed liquor return ensure treatment efficiency. It has the characteristics of compact structure and stable operation and is widely used in urban sewage treatment.

[0003] Three-phase separators are specifically designed to separate organic sludge (i.e., microbial particles), inorganic sludge, and biogas. They are significantly effective for in-situ sludge reduction in the A2O process. However, current three-phase separators are ineffective at discharging inorganic sludge and can even clog pipelines when inorganic sludge is high. Forced discharge of inorganic sludge can also contaminate organic sludge, which plays an essential role in treating organic pollutants. Therefore, it is crucial to find a way to discharge inorganic sludge from in-situ sludge reduction devices to increase its organic sludge content and, therefore, improve the efficiency of the A2O process in treating organic pollutants. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an in-situ sludge reduction device and method based on the A2O process, which can effectively discharge inorganic sludge to increase the content ratio of organic sludge, thereby improving the treatment efficiency of the A2O process for organic pollutants.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A sludge in-situ reduction device based on the A2O process comprises: a waste liquid treatment tank, a water distribution pipe, a sludge discharge pipe, and a rotary filter device.

[0007] The waste liquid treatment tank has a reaction chamber; a plurality of inorganic sludge sedimentation pits are provided at the bottom of the waste liquid treatment tank;

[0008] The outlet of the water distribution pipe extends into the reaction chamber;

[0009] The suction port and the discharge port of the sludge discharge pipe are connected to the inorganic sludge sedimentation pit and the external environment respectively;

[0010] The rotary filtering device includes a vertical rotating power mechanism and an intercepting plate, which is arranged in the reaction chamber and below the outlet of the water distribution pipe; the vertical rotating power mechanism and the intercepting plate are transmission-connected and can drive the intercepting plate to rotate to change the angle relative to the horizontal plane.

[0011] Furthermore, the interception plate is a filter plate.

[0012] Further, the intercepting plate includes a plurality of rotating unit plates, and the plurality of rotating unit plates are spaced apart in the horizontal direction and are connected in an interlocking manner to be connected to the vertical rotation power mechanism.

[0013] Further, the vertical rotation power mechanism includes a motor, a driving gear, a chain, a driven gear, a worm and a plurality of rotating shafts that are sequentially connected in transmission. The chain is vertically arranged, the driving gear is located above the chain, the driven gear is located below the chain, the worm extends in the horizontal direction, and each of the rotating shafts is coaxially and interlockingly connected to one of the rotating unit plates.

[0014] Further, an inorganic sludge partition plate is connected to the waste liquid treatment tank. The top end of the inorganic sludge partition plate is connected to the inner wall of the waste liquid treatment tank to be supported by the waste liquid treatment tank; the bottom end of the inorganic sludge partition plate extends towards the bottom of the inorganic sludge sedimentation pit and is spaced from the side wall of the inorganic sludge sedimentation pit to form a starting space for dilute-phase transportation, and the suction port of the sludge discharge pipe is located in the starting space for dilute-phase transportation.

[0015] Further, the inorganic sludge partition plate includes a shielding section and an inclined downward extending section. The shielding section is connected to the inner wall of the waste liquid treatment tank to be supported by the waste liquid treatment tank and is used to shield the starting space for dilute-phase transportation; the top of the inclined downward extending section is connected to the shielding section, and the bottom of the inclined downward extending section extends towards the bottom of the inorganic sludge sedimentation pit; the inclined downward extending section is provided with water passing through holes that penetrate the inclined downward extending section along the wall thickness direction of the inclined downward extending section; the bottom of the inclined downward extending section is spaced from the inorganic sludge sedimentation pit to form a sludge flow port, and the sludge flow port is used for the sludge in the reaction chamber to flow towards the...

[0016] Further, a plurality of sludge discharge pipes are provided, and the plurality of sludge discharge pipes are sequentially spaced apart in the direction of gravity; the plurality of sludge discharge pipes are spaced apart in the horizontal direction in the starting space for dilute-phase transportation.

[0017] Furthermore, the in-situ sludge reduction device based on the A2O process also includes a first inclined guide plate and a second inclined guide plate arranged in the reaction chamber, the first inclined guide plate and the second inclined guide plate are both located above the intercepting plate, the bottom end of the first inclined guide plate is located directly above the bottom end of the second inclined guide plate, and is spaced apart from the bottom end of the second inclined guide plate to form a liquid hole; an organic sludge retention space is formed between the first inclined guide plate and the second inclined guide plate, the organic sludge retention space is provided with an inclined tube filler, and the inclined tube filler is used to intercept organic sludge; the top of the organic sludge retention space is connected to an overflow pipe.

[0018] Furthermore, the in-situ sludge reduction device based on the A2O process also includes a water distribution plate, which is located directly below the outlet of the water distribution pipe.

[0019] A method for in-situ sludge reduction based on an A2O process, comprising the following steps of an in-situ sludge reduction device based on an A2O process according to any one of claims 1 to 9:

[0020] The intercepting plate is driven to swing by the vertical rotation power mechanism so that the intercepting plate is in a vertical state or an inclined state;

[0021] The sewage to be treated is discharged into the reaction chamber, and the organic sludge is reacted with the organic pollutants according to the preset time until the inorganic sludge settles to the inorganic sludge sedimentation pit;

[0022] After the reaction process is completed, the intercepting plate is driven to swing by the vertical rotation power mechanism, so that the intercepting plate is switched from a vertical state or an inclined state to a horizontal state;

[0023] Start the water pump to drive the sludge discharge pipe to discharge the sludge in the inorganic sludge sedimentation pit.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Based on the multiple inorganic sludge sedimentation pits set at the bottom of the waste liquid treatment tank, when the sewage enters the reaction chamber and flows into the inorganic sludge sedimentation pit, it can have more buffer space, thereby reducing the short flow or turbulence of the sewage, thereby reducing the impact of the fluctuation caused by the sewage entering the reaction chamber from the water distribution pipe on the inorganic sludge precipitation, thereby improving the precipitation efficiency of the inorganic sludge.

[0026] 2. Based on the outlet of the water distribution pipe extending into the reaction chamber, the sewage can be arranged into the inorganic sludge sedimentation pit according to the expected plan, so that the sewage can be more evenly distributed in each inorganic sludge sedimentation pit, thereby making the inorganic sludge content of each inorganic sludge sedimentation pit similar, so as to facilitate the subsequent discharge of inorganic sludge.

[0027] 3. Based on the set rotary filtration device, when sewage enters the reaction chamber, the interception plate can be controlled to rotate to form an angle with the horizontal plane so that the sewage can enter the inorganic sludge sedimentation pit for the sedimentation of inorganic sludge; when the inorganic sludge sedimentation is completed and needs to be pumped out, the rotary filtration device controls the interception plate to rotate to the horizontal plane to block the sewage from continuing to enter the inorganic sludge sedimentation pit, so that when discharging the inorganic sludge, the inorganic sludge sedimentation pits will not affect each other when pumping continues after a certain inorganic sludge sedimentation pit has completed the discharge work. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the first embodiment of a sludge in-situ reduction device based on the A2O process of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the first embodiment of a sludge in-situ reduction device based on the A2O process of the present invention.

[0030] In the figure: 1, waste liquid treatment tank; 2, reaction chamber; 3, inorganic sludge sedimentation pit; 4, water distribution pipe; 5, sludge discharge pipe; 6, vertical rotary power mechanism; 7, interception plate; 8, rotary unit plate; 9, inorganic sludge partition plate; 10, inclined downward extension section; 11, water passing through hole; 12, first inclined drainage plate; 13, second inclined drainage plate; 14, inclined tube packing; 15, water distribution plate; 16, overflow pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, in combination with the drawings and specific embodiments, the present invention will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. The "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] First Embodiment:

[0035] Refer to Figure 1 - Figure 2 , a sludge in-situ reduction device based on the A2O process according to a preferred embodiment of the present invention, comprising: a waste liquid treatment tank 1, a water distribution pipe 4, a sludge discharge pipe 5, and a rotary filtration device.

[0036] The waste liquid treatment tank 1 has a reaction chamber 2. After the sewage enters the reaction chamber 2, appropriate agents are put into the reaction chamber 2 to react with the sewage for sewage treatment; a plurality of inorganic sludge sedimentation pits 3 are provided at the bottom of the waste liquid treatment tank 1. Such a setting of a plurality of inorganic sludge sedimentation pits 3 can enable inorganic sludge to precipitate simultaneously in multiple places, thereby reducing the influence of sewage fluctuations on the sedimentation effect of inorganic sludge; the inorganic sludge after the sewage reaction will settle into the inorganic sludge sedimentation pits 3 due to the action of gravity and wait for subsequent discharge; the overall contour of the inorganic sludge sedimentation pits 3 can be a rectangular body, a triangular body or other irregular shapes. Preferably, in order to facilitate the discharge of inorganic sludge more conveniently, a conical inorganic sludge sedimentation pit 3 is selected; since the particle diameters of the organic sludge and inorganic sludge in the sewage are different, the particle diameter of the inorganic sludge is smaller than that of the organic sludge. When the organic sludge precipitates along the conical side wall of the inorganic sludge sedimentation pit 3, it will get stuck at a certain height, while the inorganic sludge will settle to the bottom of the inorganic sludge sedimentation pit 3 first through the gaps between the organic sludge, and when the inorganic sludge accumulates gradually in the inorganic sludge sedimentation pit 3, it will push the organic sludge out of the inorganic sludge sedimentation pit 3, so as to fill the inorganic sludge sedimentation pit 3, so that all the subsequent discharged sludge is inorganic sludge, thereby increasing the content ratio of the organic sludge in the reaction chamber 2.

[0037] The water distribution pipe 4 can be arranged with only one pipe or multiple pipes; the outlet of the water distribution pipe 4 extends into the reaction chamber 2, so that when the sewage enters the reaction chamber 2, it can be more evenly distributed into each inorganic sludge sedimentation pit 3 for subsequent precipitation of inorganic sludge; the outlet of the water distribution pipe 4 can be arranged on the side wall of the reaction chamber 2 or extend from the side wall into the reaction chamber 2; the sewage is discharged into the reaction chamber 2 through the outlet of the water distribution pipe 4 for reaction.

[0038] The suction port and the discharge port of the sludge discharge pipe 5 are respectively connected to the inorganic sludge sedimentation pit 3 and the external environment. The sludge discharge pipe 5 is used to discharge the inorganic sludge from the inorganic sludge tank to the outside; the sludge discharge pipe 5 can be arranged with only one pipe or multiple pipes. For better sludge discharge effect, preferably, we adopt the scheme of arranging multiple sludge discharge pipes 5. The sludge discharge pipes 5 are distributed in stages along the vertical direction to extract inorganic sludge at different heights; at the same time, multiple sludge discharge pipes 5 are also arranged along the horizontal direction to avoid the influence on the sludge discharge effect when a single sludge discharge pipe 5 is blocked.

[0039] The rotary filtration device includes a vertical rotary power mechanism 6 and an interception plate 7. The interception plate 7 is disposed within the reaction chamber 2 and below the outlet of the water distribution pipe 4. The vertical rotary power mechanism 6 and the interception plate 7 are connected by a transmission mechanism and can drive the interception plate 7 to rotate to change its angle relative to the horizontal plane. When water is discharged from the water distribution pipe 4, the vertical rotary power mechanism 6 drives the interception plate 7 to rotate, so that the interception plate 7 forms a certain angle with the horizontal direction, thereby allowing the water ejected from the water outlet of the water distribution pipe 4 to flow into the inorganic sludge sedimentation pit 3 through the space between the interception plates 7. In order to make the sewage enter the inorganic sludge sedimentation pit 3 more quickly, the interception plate 7 can preferably be rotated to a vertical direction. When the amount of sludge contained in the inorganic sludge settling pit 3 approaches saturation, the interception plate 7 is rotated to a horizontal direction by the vertical rotation power mechanism 6 to prevent more sludge from entering the inorganic sludge settling pit 3. At the same time, sludge can be extracted from multiple inorganic sludge settling pits 3. Each inorganic sludge settling pit 3 operates independently, and the sludge content in each inorganic sludge settling pit 3 does not vary, resulting in one inorganic sludge pit 3 being completely extracted first and affecting other inorganic sludge settling pits 3. At the same time, one or more concentration sensors are also installed in the inorganic sludge settling pit 3 to detect the accumulation of inorganic sludge. When the inorganic sludge in the inorganic sludge settling pit 3 reaches a certain level, the concentration sensor provides feedback to the interception plate 7, causing it to rotate to a horizontal direction to prevent further sludge from entering.

[0040] Based on the multiple inorganic sludge sedimentation pits 3 set at the bottom of the waste liquid treatment box 1, when the sewage enters the reaction chamber 2 and flows into the inorganic sludge sedimentation pit 3, it can have more buffer space, thereby reducing the short flow or turbulence of the sewage, thereby reducing the impact of the fluctuation caused by the sewage entering the reaction chamber from the water distribution pipe 4 on the precipitation of inorganic sludge, thereby improving the precipitation efficiency of the inorganic sludge.

[0041] Since the outlet of the water distribution pipe 4 extends into the reaction chamber 2, the sewage can be arranged into the inorganic sludge sedimentation pit 3 according to the expected plan, so that the sewage can be more evenly distributed in each inorganic sludge sedimentation pit 3, thereby making the inorganic sludge content of each inorganic sludge sedimentation pit 3 similar, to facilitate the subsequent discharge of inorganic sludge.

[0042] Based on the set rotary filtering device, when the sewage enters the reaction chamber, the intercepting plate 7 can be controlled to rotate to form an angle with the horizontal plane so that the sewage can enter the inorganic sludge sedimentation pit 3 for precipitation of the inorganic sludge; when the inorganic sludge is precipitated and needs to be extracted, the rotary filtering device controls the intercepting plate 7 to rotate to the horizontal plane to prevent the sewage from continuing to enter the inorganic sludge sedimentation pit 3, so that when the inorganic sludge is discharged, the various inorganic sludge sedimentation pits 3 will not affect each other because a certain inorganic sludge sedimentation pit 3 completes the discharge work first and continues to suck.

[0043] Based on the concentration sensor set in the inorganic sludge sedimentation pit 3, when the inorganic sludge enters the inorganic sludge sedimentation pit 3 and accumulates to a certain level, the concentration sensor in the inorganic sludge sedimentation pit 3 will feedback information to the interception plate 7, so that the interception plate 7 is closed to prevent the sludge from continuing to enter the inorganic sludge sedimentation pit 3, so that when the sludge discharge pipe 5 performs the sludge discharge work, the inorganic sludge in a certain inorganic sludge sedimentation pit 3 will not complete the discharge work first, thereby affecting the inorganic sludge discharge work of other inorganic sludge sedimentation pits 3.

[0044] Preferably, the intercepting plate 7 is a filter plate, the mesh diameter of the filter plate is smaller than that of the organic sludge and larger than that of the inorganic sludge, so that the organic sludge can be separated from the inorganic sludge, thereby better allowing the inorganic sludge to enter the inorganic sludge pool for discharge.

[0045] Preferably, the interception plate 7 includes a plurality of rotating unit plates 8, which are spaced apart in the horizontal direction and interconnected to be driven by the vertical rotation power mechanism 6. The interception plate 7 can include only one rotating unit, but considering that a single rotating unit solution occupies a large space when the interception plate 7 is rotated to a certain angle with the horizontal plane, a solution with multiple rotating units is preferably adopted. The multiple rotating units cooperate with each other when rotating to the horizontal plane to achieve the effect of blocking the organic sludge from the outside.

[0046] Preferably, the vertical rotation power mechanism 6 includes a motor, a driving gear, a chain, a driven gear, a worm and multiple rotating shafts that are sequentially connected. The chain is placed vertically, the driving gear is located above the chain, the driven gear is located below the chain, and the worm extends in the horizontal direction. Each rotating shaft is coaxially and interconnectedly connected to one of the rotating unit plates 8. When the rotating unit needs to be controlled, all the rotating unit plates 8 can be uniformly controlled by only one set of rotating devices.

[0047] Preferably, the waste liquid treatment tank 1 is connected to an inorganic sludge baffle 9, the top of the inorganic sludge baffle 9 is connected to the inner wall of the waste liquid treatment tank 1 to be supported by the waste liquid treatment tank 1; the bottom end of the inorganic sludge baffle 9 extends toward the bottom of the inorganic sludge sedimentation pit 3, and is spaced apart from the side wall of the inorganic sludge sedimentation pit 3 to form a dilute phase conveying starting space, and the suction port of the sludge discharge pipe 5 is located in the dilute phase conveying starting space.

[0048] Preferably, the inorganic sludge baffle 9 includes a shielding section and an inclined downward extending section 10. The shielding section is connected to the inner wall of the waste liquid treatment tank 1 to be supported by the waste liquid treatment tank 1 and is used to shield the starting space of dilute phase transportation. The top of the inclined downward extending section 10 is connected to the shielding section, and the bottom of the inclined downward extending section 10 extends towards the bottom of the inorganic sludge sedimentation pit 3. The inclined downward extending section 10 is provided with water passing through holes 11, and the water passing through holes 11 penetrate through the inclined downward extending section 10 along the wall thickness direction of the inclined downward extending section 10. The bottom of the inclined downward extending section 10 is arranged at an interval from the inorganic sludge sedimentation pit 3 to form a sludge flow port, and the sludge flow port is used for the sludge in the reaction chamber 2 to flow.

[0049] Preferably, multiple sludge discharge pipes 5 are provided. If only a single sludge discharge pipe 5 is provided, it will have a great impact on the entire sludge discharge device and reduce the sludge discharge efficiency if it cannot be replaced in time when the sludge discharge pipe 5 is blocked. Therefore, preferably, the scheme of multiple sludge discharge pipes 5 is adopted. When a certain sludge discharge pipe 5 is blocked, other sludge discharge pipes 5 can still be used for sludge discharge work. The multiple sludge discharge pipes 5 are sequentially arranged at intervals along the gravity direction, so that the inorganic sludge can be discharged in stages from high to low to ensure that the inorganic sludge at each height is discharged. The multiple sludge discharge pipes 5 are arranged at intervals in the horizontal direction in the starting space of dilute phase transportation to improve the sludge discharge efficiency.

[0050] Preferably, the sludge in-situ reduction device based on the A2O process further includes a first inclined drainage plate 12 and a second inclined drainage plate 13 arranged in the reaction chamber 2. Both the first inclined drainage plate 12 and the second inclined drainage plate 13 are located above the intercepting plate 7. The bottom end of the first inclined drainage plate 12 is directly above the bottom end of the second inclined drainage plate 13 and is arranged at an interval from the bottom end of the second inclined drainage plate 13 to form a liquid passing hole. An organic sludge interception space is formed between the first inclined drainage plate 12 and the second inclined drainage plate 13. The organic sludge interception space is provided with inclined tube fillers 14, and the inclined tube fillers 14 are used to intercept organic sludge. The top of the organic sludge interception space is connected with an overflow pipe 16.

[0051] Preferably, the sludge in-situ reduction device based on the A2O process further includes a water distribution plate 15. The water distribution plate 15 is directly below the outlet of the water distribution pipe 4 and is used to distribute the sewage sprayed from the water distribution pipe 4 into each inorganic sludge sedimentation pit 3.

[0052] A sludge in-situ reduction method based on the A2O process includes the following steps of a sludge in-situ reduction device based on the A2O process according to any one of claims 1-9:

[0053] Driving the intercepting plate 7 to swing through the vertical rotation power mechanism 6 so that the intercepting plate 7 is in a vertical state or an inclined state;

[0054] Discharge the sewage to be treated into the reaction chamber 2, wait for the organic sludge to react with the organic pollutants according to a preset time until the inorganic sludge settles to the inorganic sludge sedimentation pit 3;

[0055] After the reaction treatment is completed, drive the intercepting plate 7 to swing through the vertical rotation power mechanism 6 so that the intercepting plate 7 switches from the vertical state or the inclined state to the horizontal state;

[0056] Start the water pump to drive the sludge discharge pipe 5 to discharge the sludge in the inorganic sludge sedimentation pit 3.

[0057] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0059] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed in the present application, and these should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sludge in-situ reduction device based on the A2O process, characterized in that, Comprising: A waste liquid treatment tank (1), the waste liquid treatment tank (1) having a reaction chamber (2); a plurality of inorganic sludge sedimentation pits are provided at the bottom of the waste liquid treatment tank (1); A water distribution pipe (4), the outlet of the water distribution pipe (4) extending into the reaction chamber (2); A sludge discharge pipe (5), the suction port and the discharge port of the sludge discharge pipe (5) being respectively connected to the inorganic sludge sedimentation pit (3) and the external environment; A rotary filtering device, the rotary filtering device comprising a vertical rotary power mechanism (6) and an intercepting plate (7), the intercepting plate (7) being arranged in the reaction chamber (2) and located below the outlet of the water distribution pipe (4); the vertical rotary power mechanism (6) is in transmission connection with the intercepting plate (7) and can drive the intercepting plate (7) to rotate to change the angle relative to the horizontal plane.

2. The sludge in-situ reduction device based on the A2O process according to claim 1, wherein, The intercepting plate (7) is a filter plate.

3. The sludge in-situ reduction device based on the A2O process according to claim 1, wherein, The intercepting plate (7) comprises a plurality of rotary unit plates (8), the plurality of rotary unit plates (8) being spaced apart in the horizontal direction and interconnected to be in transmission connection with the vertical rotary power mechanism (6).

4. The sludge in-situ reduction device based on the A2O process according to claim 3, characterized in that The vertical rotary power mechanism (6) comprises a motor, a driving gear, a chain, a driven gear, a worm and a plurality of rotating shafts which are sequentially in transmission connection, the chain is vertically arranged, the driving gear is located above the chain, the driven gear is located below the chain, the worm extends in the horizontal direction, and each of the rotating shafts is coaxially and interconnectedly connected to one of the rotary unit plates (8).

5. The sludge in-situ reduction device based on the A2O process according to claim 3, characterized in that, The waste liquid treatment tank (1) is connected with an inorganic sludge baffle (9), the top end of the inorganic sludge baffle (9) is connected to the inner wall of the waste liquid treatment tank (1) to be supported by the waste liquid treatment tank (1); the bottom end of the inorganic sludge baffle (9) extends towards the bottom of the inorganic sludge sedimentation pit and is spaced from the side wall of the inorganic sludge sedimentation pit to form a starting space for dilute phase transportation, and the suction port of the sludge discharge pipe (5) is located in the starting space for dilute phase transportation.

6. The sludge in-situ reduction device based on the A2O process according to claim 5, wherein, The inorganic sludge baffle (9) comprises a shielding section and an inclined downward extending section (10), the shielding section is connected to the inner wall of the waste liquid treatment tank (1) to be supported by the waste liquid treatment tank (1) and is used for shielding the starting space for dilute phase transportation; the top of the inclined downward extending section (10) is connected to the shielding section, the bottom of the inclined downward extending section (10) extends towards the bottom of the inorganic sludge sedimentation pit (3); the inclined downward extending section (10) is provided with a water passing through hole (11), the water passing through hole (11) penetrating through the inclined downward extending section (10) along the wall thickness direction of the inclined downward extending section (10); the bottom of the inclined downward extending section (10) is spaced from the inorganic sludge sedimentation pit (3) to form a sludge flow through opening, and the sludge flow through opening is used for allowing the sludge in the reaction chamber (2) to flow towards the starting space for dilute phase transportation.

7. The sludge in-situ reduction device based on the A2O process according to claim 6, characterized in that, A plurality of the sludge discharge pipes (5) are provided, the plurality of sludge discharge pipes (5) being sequentially spaced apart in the direction of gravity; the plurality of sludge discharge pipes (5) are spaced apart in the horizontal direction in the starting space for dilute phase transportation.

8. The sludge in-situ reduction device based on the A2O process according to claim 1, characterized in that, The in-situ sludge reduction device based on the A2O process further includes a first inclined drainage plate (12) and a second inclined drainage plate (13) disposed in the reaction chamber (2). Both the first inclined drainage plate (12) and the second inclined drainage plate (13) are located above the intercepting plate (7). The bottom end of the first inclined drainage plate (12) is directly above the bottom end of the second inclined drainage plate (13) and is spaced from the bottom end of the second inclined drainage plate (13) to form a liquid passing hole. An organic sludge interception space is formed between the first inclined drainage plate (12) and the second inclined drainage plate (13). The organic sludge interception space is provided with inclined tube fillers (14) for intercepting organic sludge. The top of the organic sludge interception space is connected to an overflow pipe (16).

9. The sludge in-situ reduction device based on the A2O process according to claim 1, characterized in that, The in-situ sludge reduction device based on the A2O process further includes a water distribution plate (15) located directly below the outlet of the water distribution pipe (4).

10. A method for in-situ sludge reduction based on the A2O process, characterized in that, It includes the following steps for an in-situ sludge reduction device based on the A2O process according to any one of claims 1-9: Drive the intercepting plate to swing through the vertical rotation power mechanism (6) so that the intercepting plate (7) is in a vertical state or an inclined state; Discharge the sewage to be treated into the reaction chamber (2), wait for the organic sludge to react with the organic pollutants according to a preset time until the inorganic sludge settles to the inorganic sludge sedimentation pit (3); After the reaction treatment is completed, drive the intercepting plate (7) to swing through the vertical rotation power mechanism (6) so that the intercepting plate (7) is switched from a vertical state or an inclined state to a horizontal state; Start the water pump to drive the sludge discharge pipe (5) to discharge the sludge in the inorganic sludge sedimentation pit (3).

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