Integrated ao reactor with sludge-water separation function

Abstract

The present application relates to integrated AO reactor with sludge-water separation function, which comprises a hopper, an influent zone, an anoxic zone, an aerobic zone, a separation zone and an effluent zone from bottom to top, and comprises an inner cylinder and an outer cylinder from inside to outside, the inner cylinder and the outer cylinder are concentrically arranged, the top of the outer cylinder is higher than the top of the inner cylinder, and the bottom of the outer cylinder is lower than the bottom of the inner cylinder; the influent zone is at the bottom of the outer cylinder; the anoxic zone is at the lower part of the outer cylinder, the aerobic zone is at the inside of the inner cylinder, and the bottom of the inner cylinder is provided with an aeration pipe; the top of the inner cylinder is open and communicates with the inside space of the outer cylinder, the space between the inner cylinder and the outer cylinder is a nitrification liquid reflux zone, and a gap is left between the bottom opening of the inner cylinder and the inner wall of the outer cylinder, so that the refluxed nitrification liquid can enter the anoxic zone; the separation zone is above the outer cylinder, and is used for separating the sludge and water of the treated water output by the inner cylinder; the space between the outer cylinder and the inner wall of the reactor is a sludge settling zone, and the sludge separated from the separation zone falls into the hopper through the sludge settling zone.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to an integrated AO reactor with mud-water separation function. Background Technology

[0002] With the improvement of people's living standards and increasing emphasis on environmental protection, my country's wastewater discharge standards are becoming increasingly stringent. These standards not only restrict the types of pollutants but also require increasingly lower pollutant concentrations. This is beneficial for improving the water quality of my country's rivers and enhancing the quality of reclaimed / reused water. Anaerobic / aerobic (AO) treatment is an important wastewater treatment method. Traditional AO treatment processes employ a series of anoxic tanks, aerobic tanks, and sludge sedimentation tanks. This results in numerous structural units, a large footprint, and high investment and operating energy consumption, which to some extent limits the widespread application of the AO process. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an integrated AO reactor with sludge-water separation function, comprising, from bottom to top, a sludge hopper, an inlet zone, an anoxic zone, an aerobic zone, a separation zone, and an outlet zone. The integrated AO reactor comprises, from inside to outside, an inner cylinder and an outer cylinder, which are concentrically arranged. The top of the outer cylinder is higher than the top of the inner cylinder, and the bottom of the outer cylinder is lower than the bottom of the inner cylinder.

[0004] The inlet zone is located at the bottom of the outer cylinder and is used to input wastewater into the outer cylinder; the anoxic zone is located at the bottom of the outer cylinder, and the aerobic zone is located inside the inner cylinder. An aeration pipe is installed at the bottom of the inner cylinder to provide oxygen to the aerobic zone; the top of the inner cylinder is open and communicates with the internal space of the outer cylinder. The space between the inner and outer cylinders is the nitrification liquid return zone. A gap is left between the bottom opening of the inner cylinder and the inner wall of the outer cylinder so that the nitrification liquid for return can enter the anoxic zone.

[0005] The separation zone is located above the outer cylinder and is used to separate the treated water output from the inner cylinder into mud and water. The area between the outer cylinder and the inner wall of the integrated AO reactor is a sludge settling zone, where the sludge separated by the separation zone falls into the sludge hopper.

[0006] Optionally, the bottom of the integrated AO reactor is provided with a sludge discharge port, which is connected in parallel to a sludge return pump and a sludge discharge pipe via a pipeline;

[0007] The inlet of the sludge return pump is connected to the sludge discharge port, and the outlet of the sludge return pump is connected to the water inlet area through the sludge return pipe, so that some of the sludge can be returned to the bottom of the outer cylinder and then rise to the anoxic zone.

[0008] Optionally, the outer cylinder has openings at both the top and bottom. The outer cylinder wall, from top to bottom, includes a vertical wall, an inclined wall, a contraction wall, and an expansion wall. The vertical wall, the contraction wall, and the inner cylinder wall are all vertical and straight. The inclined wall is inclined towards the inside of the integrated AO reactor, causing the inner diameter of the outer cylinder to contract. The expansion wall is inclined towards the outside of the integrated AO reactor, causing the inner diameter of the outer cylinder to increase.

[0009] The bottom opening of the inner cylinder is within the range of the inclined wall, and the gap between the bottom opening of the inner cylinder and the inclined wall is the nitrification liquid return slit. The area below the nitrification liquid return slit up to the bottom of the contraction wall is the anoxic zone. The nitrification liquid in the nitrification liquid return zone is input into the anoxic zone through the nitrification liquid return slit.

[0010] A water distributor is installed at the bottom of the expansion wall, and the water inlet area is above the water distributor.

[0011] Optionally, the inlet of the water distributor is connected to an inlet pipe, allowing wastewater to be treated to be input from the outside; a stirrer is provided in the inlet zone to agitate the wastewater input by the water distributor, causing the wastewater to swirl upwards and then enter the anoxic zone.

[0012] Optionally, the anoxic zone is equipped with a first microbial carrier loaded with anoxic microorganisms. When wastewater rising from the swirling inlet zone passes through the anoxic zone, it undergoes anoxic biochemical treatment.

[0013] Optionally, the aeration pipe is connected to an aeration blower outside the reactor via a pipeline; a second microbial carrier is provided inside the aerobic zone and loaded with aerobic microorganisms, so that when wastewater rising from the anoxic zone passes through the aerobic zone, it undergoes aerobic biochemical treatment.

[0014] Optionally, the top of the nitrification liquid reflux zone is provided with an intercepting net, the outer edge of which is connected to the top edge of the outer cylinder, and the inner edge of which is connected to the top edge of the inner cylinder.

[0015] Optionally, the mud hopper is an inverted cone shape, surrounded by four trapezoidal inclined wall support plates. The upper surface of each inclined wall support plate is provided with a corrugated structure layer. The corrugated structure layer includes two corrugated plates, which are stacked one on top of the other. The corrugated plates include several peaks and troughs. The peaks of the two corrugated plates correspond to each other, and the troughs correspond to each other.

[0016] Each crest and trough points from the upper part of the inclined wall support plate to the lower part of the inclined wall support plate;

[0017] Several telescopic crossbeams are evenly provided on the lower surface of each crest of the upper and lower corrugated plates. The two ends of the telescopic crossbeams abut against the two sides of the crest to adjust the angle of the crest.

[0018] The troughs of the lower corrugated plate are slidably connected to the guide rail grooves, and several guide rail grooves are horizontally arranged on the upper surface of the inclined wall support plate.

[0019] Optionally, several telescopic vertical rods are evenly arranged below each crest of the lower corrugated plate to extend the lower corrugated plate and adjust the height of the upper corrugated plate.

[0020] Several telescopic vertical rods are evenly arranged on the upper surface of the inclined wall support plate along the length direction of the corresponding same wave crest, and the position of the telescopic vertical rods does not coincide with the guide rail groove.

[0021] The bottom of the telescopic vertical rod is fixed to the inclined wall support plate, and the top is provided with an inverted U-shaped fixing bracket to support the lower surface of the crest of the upper corrugated plate;

[0022] The lower corrugated plate has notches at the positions of the crests corresponding to the telescopic vertical rods, allowing the telescopic vertical rods to extend and retract vertically. The spacing between the upper and lower corrugated plates can be adjusted by changing the height of the telescopic vertical rods.

[0023] Optionally, for the upper corrugated plate, several upper telescopic crossbeams are evenly arranged on the lower surface of the upper corrugated plate along the length direction of the corresponding same corrugation crest, and the position of the upper telescopic crossbeams corresponds to the position of the notch of the lower corrugated plate.

[0024] For the lower corrugated plate, several lower telescopic crossbeams are evenly arranged on the lower surface of the lower corrugated plate along the length direction of the same corresponding wave crest, and the position of the lower telescopic crossbeams does not correspond to the position of the notch. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an integrated AO reactor with mud-water separation function;

[0026] Figure 2 This is a top view of the mud bucket;

[0027] Figure 3 This is a structural diagram of the upper corrugated plate and the lower corrugated plate;

[0028] Figure 4 This is a schematic diagram showing the coordination between the telescopic vertical rod and the upper and lower corrugated plates.

[0029] In the attached diagram, 1-sludge hopper, 2-inlet zone, 3-anoxic zone, 4-aerobic zone, 5-separation zone, 6-outlet zone, 7-inner cylinder, 8-outer cylinder, 9-aeration pipe, 10-nitrification liquor return zone, 11-sludge settling zone, 12-sludge return pump, 13-sludge discharge pipe, 14-vertical wall, 15-inclined wall, 16-contraction wall, 17-expansion wall, 18-nitrification liquor return slit, 1 9-Water distributor, 20-Aeration blower, 21-Inclined plate, 22-Outlet weir, 23-Interception net, 24-Inclined wall support plate, 25-Curved section, 26-Upper corrugated plate, 27-Lower corrugated plate, 28-Upper telescopic crossbeam, 29-Telescopic vertical rod, 30-Guide rail groove, 31-Slider, 32-Inverted U-shaped fixed support, 33-Notch, 34-Lower telescopic crossbeam, 35-Straight section. Detailed Implementation

[0030] This embodiment provides an integrated AO reactor with mud-water separation function, such as Figures 1-4 As shown, from bottom to top, the integrated AO reactor includes a mud hopper 1, an inlet zone 2, anoxic zone 3, aerobic zone 4, separation zone 5, and outlet zone 6. From the inside to the outside, the integrated AO reactor includes an inner cylinder 7 and an outer cylinder 8. The inner cylinder 7 and the outer cylinder 8 are concentrically arranged. The top of the outer cylinder 8 is higher than the top of the inner cylinder 7, and the bottom of the outer cylinder 8 is lower than the bottom of the inner cylinder 7.

[0031] The inlet zone 2 is located at the bottom of the outer cylinder 8 and is used to input wastewater into the outer cylinder 8; the anoxic zone 3 is located at the bottom of the outer cylinder 8, and the aerobic zone 4 is located inside the inner cylinder 7. The bottom of the inner cylinder 7 is equipped with an aeration pipe 9 to provide oxygen to the aerobic zone 4; the top of the inner cylinder 7 is open and communicates with the internal space of the outer cylinder 8. The nitrification liquid return zone 10 is located between the inner cylinder 7 and the outer cylinder 8. A gap is left between the bottom opening of the inner cylinder 7 and the inner wall of the outer cylinder 8 so that the nitrification liquid for return can enter the anoxic zone 3.

[0032] The separation zone 5 is located above the outer cylinder 8 and is used to separate the treated water from the inner cylinder 7. The space between the outer cylinder 8 and the inner wall of the integrated AO reactor is the sludge settling zone 11, and the sludge separated by the separation zone 5 falls into the sludge hopper 1 through the sludge settling zone 11.

[0033] Optionally, the bottom of the integrated AO reactor is provided with a sludge discharge port, which is connected in parallel to a sludge return pump 12 and a sludge discharge pipe 13 through a pipeline. The sludge discharge pipe 13 discharges part of the sludge from the AO reactor for subsequent specialized treatment.

[0034] The inlet of the sludge return pump 12 is connected to the sludge discharge port, and the outlet of the sludge return pump 12 is connected to the water inlet zone 2 through the sludge return pipe, so that part of the sludge is returned to the bottom of the outer cylinder 8 so that it can rise to the anoxic zone 3.

[0035] Optionally, the outer cylinder 8 has openings at both the top and bottom. The outer cylinder 8 wall, from top to bottom, includes a vertical wall 14, an inclined wall 15, a contraction wall 16, and an expansion wall 17. The vertical wall 14, the contraction wall 16, and the inner cylinder 7 wall are all vertical and straight. The inclined wall 15 is inclined toward the interior of the integrated AO reactor, causing the inner diameter of the outer cylinder 8 to contract. The expansion wall 17 is inclined toward the exterior of the integrated AO reactor, causing the inner diameter of the outer cylinder 8 to increase.

[0036] The bottom opening of the inner cylinder 7 is within the range of the inclined wall 15, and the gap between the bottom opening of the inner cylinder 7 and the inclined wall 15 is the nitrification liquid return slit 18. The area below the nitrification liquid return slit 18 up to the bottom of the contraction wall 16 is the anoxic zone 3. The nitrification liquid in the nitrification liquid return zone 10 is input into the anoxic zone 3 through the nitrification liquid return slit 18.

[0037] The bottom of the expansion wall 17 is provided with a water distributor 19, and the water inlet area 2 is located above the water distributor 19.

[0038] Further optionally, the top opening of the inner cylinder 7 is slightly lower than the top opening of the outer cylinder 8. For example, the distance between the top opening of the inner cylinder 7 and the top opening of the outer cylinder 8 is 1 / 10 of the height of the vertical wall 14, so that the nitrified liquid rising from the aerobic zone 4 inside the inner cylinder 7 can first flow into the nitrified liquid return zone 10.

[0039] Optionally, the inlet of the water distributor 19 is connected to an inlet pipe, allowing the wastewater to be treated to be input from the outside; a conventional water distributor can be used for the water distributor 19.

[0040] Optionally, the inlet zone 2 is equipped with a stirrer to agitate the wastewater input by the water distributor 19, so that the wastewater swirls upward and enters the anoxic zone 3. The stirrer includes a vertical stirring shaft, several horizontally placed stirring paddles and a motor. The stirring paddles are fixedly connected to the stirring shaft, and the motor is located below the stirring shaft. The stirring shaft is located at the center of the outer cylinder 8. The motor adopts a waterproof design and can be connected to the side wall of the inlet zone 2 through a bracket or support rod to fix the stirrer.

[0041] Optionally, the anoxic zone 3 is provided with a first microbial carrier loaded with anoxic microorganisms. When the wastewater rising from the swirling water inlet zone 2 passes through the anoxic zone 3, it undergoes anoxic biochemical treatment.

[0042] Further optionally, the anoxic zone 3 includes a plurality of first guide plates and a plurality of second guide plates, the first guide plates and the second guide plates are alternately arranged and are both horizontally arranged, and a first microbial carrier is provided between adjacent first guide plates and second guide plates;

[0043] In hypoxic zone 3, the bottom and top guide plates are both first guide plates. A first microbial carrier is set above the top first guide plate, and no first microbial carrier is set below the bottom first guide plate.

[0044] Alternatively, the outer edge of the first guide plate is fixed to the constriction wall 16, and a water guide hole is provided in the center to allow wastewater below the first guide plate to pass through;

[0045] The lower surface of the second guide plate is evenly provided with several support rods. The bottom end of the support rods is connected to the upper surface of the first guide plate to support the second guide plate. The outer edge of the second guide plate does not contact the contraction wall 16, and the gap left is a water guide channel.

[0046] Optionally, the first microbial carrier includes a central axis and several biological discs arranged side by side on the central axis. The central axis is horizontally positioned, the biological discs are perpendicular to the central axis, and the several biological discs are evenly arranged along the length of the central axis. The two ends of the central axis are connected to a shrinkage wall 16.

[0047] Wastewater rising from inlet zone 2 into anoxic zone 3 passes through the water guide holes of the first guide plate at the bottom, spreading outwards from the center and undergoing anoxic treatment through the various biological discs of the first microbial carrier. Then, the wastewater continues upwards through the water guide channels of the second guide plate, flowing from the periphery towards the center and passing through the first microbial carrier on the second guide plate. When the wastewater flows back to the center, it passes through the water guide holes of the first guide plate above. This process is repeated to prolong the residence time and improve the treatment effect of anoxic zone 3.

[0048] Optionally, the aeration pipe 9 is connected to the aeration fan 20 outside the reactor through a pipeline to input air and oxygen into the upper aerobic zone 4, and the gas enters the aerobic zone 4 upward;

[0049] The aerobic zone 4 contains a second microbial carrier loaded with aerobic microorganisms. When wastewater from the anoxic zone 3 passes through the aerobic zone 4, it undergoes aerobic biochemical treatment.

[0050] The choice between anaerobic and aerobic microorganisms depends on the type of pollutants in the wastewater being treated.

[0051] Optionally, a plurality of inclined plates 21 are provided in the separation zone 5. The inclined plates 21 are parallel to each other. Multiple layers of inclined plates 21 can also be provided. The liquid output from the aerobic zone 4 enters the separation zone 5 upward and is separated into mud and water by the inclined plates 21.

[0052] Optionally, the top of the water outlet zone 6 is provided with a water outlet weir 22, which is connected to a water outlet pipe. The water separated by the separation zone 5 continues to rise to the water outlet zone 6 and overflows from the water outlet weir 22 and is discharged through the water outlet pipe.

[0053] Because the bottom of the nitrification liquid return zone 10 is narrowed on both sides by the nitrification liquid return slit 18 and the inclined wall 15, a negative pressure is formed at the nitrification liquid return slit 18, which attracts water from above. Some of the water (i.e., nitrification liquid) that has passed through the aerobic zone 4 is attracted to the top of the nitrification liquid return zone 10, and then flows down along the outer wall of the inner cylinder 7 and the inner wall of the outer barrel, and finally returns to the anoxic zone 3 through the nitrification liquid return slit 18.

[0054] The sludge separated in separation zone 5 moves downward. Because the top opening of inner cylinder 7 has an upward water flow, the falling sludge cannot fall into inner cylinder 7. Instead, the falling sludge falls into sludge settling zone 11. The bottom of sludge settling zone 11 is connected to sludge hopper 1, so that the sludge eventually falls into sludge hopper 1 and is discharged from sludge discharge port.

[0055] Optionally, the top of the nitrification liquid return zone 10 is provided with an intercepting net 23. The outer edge of the intercepting net 23 is connected to the top edge of the outer cylinder 8, and the inner edge of the intercepting net 23 is connected to the top edge of the inner cylinder 7. The intercepting net 23 can prevent sludge falling from the separation zone 5 from entering the nitrification liquid return zone 10, while not affecting the entry of nitrification liquid from the inner cylinder 7 into the nitrification liquid return zone 10. Since the top of the inner cylinder 7 is lower than the top of the outer cylinder 8, the intercepting net 23 is oblique, or the inner side of the intercepting net 23 has a right-angle bend, and the vertical part after the bend is used to connect to the top edge of the inner cylinder 7.

[0056] Optionally, the mud hopper 1 is an inverted cone shape, surrounded by four trapezoidal inclined wall support plates 24. The upper surface of each inclined wall support plate 24 is provided with a corrugated structure layer. The corrugated structure layer includes two corrugated plates, which are stacked one on top of the other. The corrugated plates include several peaks and troughs. The peaks of the two corrugated plates correspond to each other, and the troughs correspond to each other.

[0057] Each crest and trough points from the upper part of the inclined wall support plate 24 to the lower part of the inclined wall support plate 24, that is, the central axis of the crest and trough is in the vertical direction. The corrugated plate on the inclined wall support plate 24 makes up for the deficiency of the insufficient tilt angle of the inclined wall support plate 24 and provides the tilt angle bonus for the inclined wall support plate 24.

[0058] Several telescopic crossbeams are evenly provided on the lower surface of each corrugated peak of the upper corrugated plate 26 and the lower corrugated plate 27. The two ends of the telescopic crossbeams abut against the two sides of the corrugated peak to adjust the angle of the corrugated peak. That is, when the telescopic crossbeams are extended, the angle of the corrugated peak increases, and when the telescopic crossbeams are shortened, the angle of the corrugated peak decreases.

[0059] The troughs of the lower corrugated plate 27 are slidably connected to the guide rail grooves 30, and several guide rail grooves 30 are horizontally arranged on the upper surface of the inclined wall support plate 24.

[0060] The corrugated structural layers on adjacent inclined wall support plates 24 are not connected to each other, which facilitates the independent movement of each corrugated structural layer. Each crest and trough points from the upper part of the inclined wall support plate 24 to the lower part of the inclined wall support plate 24. The sludge falling on the crest slides down the slope of the crest into the trough, and then continues to slide down the trough to the bottom of the sludge hopper 1. The sludge falling on the trough slides directly down the trough to the bottom of the sludge hopper 1.

[0061] Optionally, the inclined wall support plate 24 is made of steel plate, stainless steel plate or the same material as the sedimentation tank. The strength of the inclined wall support plate 24 is sufficient to support the weight of the effective water depth and the weight of the sludge in the integrated AO reactor, serving as the corrugated structure layer and the bottom support structure of the entire integrated AO reactor.

[0062] Optionally, several telescopic vertical rods 29 are evenly arranged below each crest of the lower corrugated plate 27 for extending out of the lower corrugated plate 27 and adjusting the height of the upper corrugated plate 26.

[0063] Several telescopic vertical rods 29 are evenly arranged on the upper surface of the inclined wall support plate 24 along the length direction of the corresponding same wave crest, and the position of the telescopic vertical rods 29 does not coincide with the guide rail groove 30.

[0064] The bottom of the telescopic vertical rod 29 is fixed on the inclined wall support plate 24, and the top is provided with an inverted U-shaped fixing bracket 32 ​​to support the lower surface of the crest of the upper corrugated plate 26.

[0065] The lower corrugated plate 27 has a notch 33 at the position of the telescopic vertical rod 29 corresponding to the crest of the wave, allowing the telescopic vertical rod 29 to extend and retract vertically. The spacing between the upper and lower corrugated plates 27 can be adjusted by changing the height of the telescopic vertical rod 29.

[0066] Optionally, for the upper corrugated plate 26, several upper telescopic beams 28 are evenly arranged on the lower surface of the upper corrugated plate 26 along the length direction of the corresponding same corrugation crest, and the position of the upper telescopic beams 28 corresponds to the position of the notch 33 of the lower corrugated plate 27.

[0067] For the lower corrugated plate 27, several lower telescopic beams 34 are evenly arranged on the lower surface of the lower corrugated plate 27 along the length direction of the same corresponding wave crest, and the position of the lower telescopic beams 34 does not correspond to the position of the notch 33.

[0068] Preferably, since the inclined wall support plate 24 is an inverted trapezoid, the telescopic beams of the same wave crest gradually decrease in length from top to bottom, so that the apex angle of the same wave crest gradually decreases from top to bottom. In this way, after several wave crests are combined, the width of the upper part of the corrugated plate is greater than the width of the lower part, which conforms to the shape of the inclined wall support plate 24.

[0069] Preferably, the lower telescopic beam 34 is positioned close to the notch 33, meaning that the horizontal distance between the corresponding upper telescopic beam 28 and the lower telescopic beam 34 will not differ significantly.

[0070] The apex angles of the corresponding upper and lower corrugated plate 26 and the lower corrugated plate 27 are the same, that is, the extension lengths of the upper telescopic beam 28 and the lower telescopic beam 34 corresponding to the upper and lower corrugated plate 26 are equal.

[0071] The telescopic heights of the telescopic vertical rods 29 corresponding to different crests of the upper corrugated plate 26 at the same horizontal height are equal, making the upper corrugated plate 26 straight. The telescopic heights of the telescopic vertical rods 29 corresponding to the same crest of the upper corrugated plate 26 can be equal or gradually decrease from top to bottom, so that the overall tilt angle of the upper corrugated plate 26 can be increased, further increasing the tilt angle, while the overall tilt angle of the lower corrugated plate 27 remains unchanged.

[0072] The crest angle, trough arc, and trough radius of the upper and lower corrugated plates 27 can be adjusted according to the actual size of the mud hopper 1. Gaps are reserved between both sides of the upper and lower corrugated plates 27 and the corresponding sides of the inclined wall support plate 24, allowing the corrugated plates to extend on both sides when the crest angle increases; the top and bottom of the upper and lower corrugated plates 27 remain fixed.

[0073] Optionally, the guide rail groove 30 includes a straight portion 35 in the middle and curved portions 25 on both sides. The curved portions 25 have an upward convex curvature. Since the inclined wall support plate 24 is an inverted trapezoid, the apex angle of the upper and lower corrugated plates 27 increases, thereby increasing the width of the corrugated plates. In order to match the shape characteristics of the inclined wall support plate 24, the apex angle of the upper corrugated plate increases more than that of the lower corrugated plate, so that when the corrugated plate is widened to a greater extent, it forms a shape that is wider at the top and narrower at the bottom. Therefore, the two sides of the guide rail groove 30 are upward convex curved portions 25. If the corrugated plate is not widened much and the corrugated plate is still square with the same width at the top and bottom, then the straight portion 35 of the guide rail groove 30 is used.

[0074] Several sliders 31 are provided within the same guide rail groove 30, and each slider 31 is connected to a corresponding trough. Within the same guide rail groove 30, the distance between two adjacent sliders 31 is the distance between two adjacent troughs.

[0075] Preferably, the straight portion 35 of a guide rail groove 30 is parallel to the nearest upper telescopic crossbeam 28 or lower telescopic crossbeam 34, so that the expansion and contraction of the corrugated plate can be carried out along the guide rail groove 30.

[0076] Optionally, the upper surface of the guide rail groove 30 is provided with a rubber cover plate with a slit in the middle, allowing the top of the slider 31 to be exposed without affecting the movement of each slider 31 along the guide rail groove 30. The rubber cover plate prevents excessive sludge from falling into the guide rail groove 30 from the mud hopper 1.

[0077] The two-layer corrugated plate provided by this invention expands the tilt angle addition range of the corrugated structure layer, making its application more flexible. When a single-layer corrugated plate can meet the tilt angle addition requirements, the two layers of corrugated plates can be stacked vertically without needing to increase the distance between them. In this case, the trough of the upper corrugated plate 26 is nested in the trough of the lower corrugated plate 27, and the crest of the upper corrugated plate 26 overlaps the crest of the lower corrugated plate 27. Since the position of the upper telescopic beam 28 corresponds to the position of the notch 33 of the lower corrugated plate 27, when stacking, the upper telescopic beam 28 is engaged in the notch 33, allowing the upper and lower corrugated plates 27 to be stacked stably. At this time, the telescopic vertical rod 29 is in its shortest state, and the inverted U-shaped fixing bracket 32 ​​is located below the crest of the lower corrugated plate 27.

[0078] When a single-layer corrugated plate cannot meet the requirements for tilt angle adjustment, the telescopic vertical rod 29 extends, and the inverted U-shaped fixing bracket 32 ​​extends from the notch 33, engaging the lower surface of the crest of the upper corrugated plate 26 to lift it up. Sludge at the bottom of the upper corrugated plate 26 can also fall into the bottom of the sludge hopper 1 and be discharged through the sludge discharge port. When it is necessary to adjust the crest angle of the upper and lower corrugated plates 27, the upper telescopic crossbeam 28 and the lower telescopic crossbeam 34 extend or shorten synchronously, changing the angle of the crests of the two corrugated plates and thus changing the width of the two corrugated plates; and the angles of the corresponding upper and lower crests of the upper and lower corrugated plates 27 always remain the same. As the crest angle increases, the overall width of the two corrugated plates increases, causing the slider 31 to slide in the straight section 35 of the guide rail groove 30, allowing the corrugated plates to widen. When the crest angle of the upper part of the two corrugated plates further increases, making the corrugated plates fan-shaped, the slider 31 slides in the arc section 25 of the guide rail groove 30. When the upper corrugated plate 26 widens, the position of the crest will move slightly, thereby causing the inverted U-shaped fixed support 32 to move slightly, which in turn causes the corresponding telescopic vertical rod 29 to tilt to a certain extent. However, since the notch 33 has a certain lateral length, the telescopic vertical rod 29 is allowed to tilt.

[0079] Alternatively, the corrugated plate may be made of UPVC (rigid PVC) or HDPE (high-density polyethylene), utilizing the smooth surface of the plastic material to improve the sludge removal effect.

Claims

1. An integrated AO reactor with sludge-water separation function, characterized in that, The integrated AO reactor comprises a sludge hopper, an influent zone, an anoxic zone, an aerobic zone, a separation zone and an effluent zone from bottom to top, and comprises an inner cylinder and an outer cylinder from inside to outside, the inner cylinder and the outer cylinder are concentrically arranged, the top of the outer cylinder is higher than the top of the inner cylinder, and the bottom of the outer cylinder is lower than the bottom of the inner cylinder; The influent zone is arranged at the bottom of the outer cylinder and is used for inputting wastewater into the outer cylinder; the anoxic zone is arranged at the lower part of the outer cylinder, the aerobic zone is arranged in the inner cylinder, the bottom of the inner cylinder is provided with an aeration pipe for providing oxygen for the aerobic zone; the top of the inner cylinder is open and communicates with the inner space of the outer cylinder, the space between the inner cylinder and the outer cylinder is a nitrification liquid reflux zone, and a gap is left between the bottom opening of the inner cylinder and the inner wall of the outer cylinder, so that the refluxed nitrification liquid can enter the anoxic zone; The separation zone is arranged above the outer cylinder and is used for separating sludge from water; the space between the outer cylinder and the inner wall of the integrated AO reactor is a sludge settling zone, and the sludge separated from the separation zone falls into the sludge hopper through the sludge settling zone; The sludge hopper is a reverse cone shape and is surrounded by four trapezoidal inclined wall support plates, the upper surface of each inclined wall support plate is provided with a corrugated structure layer, the corrugated structure layer comprises two corrugated plates which are stacked one above another, the corrugated plate comprises a plurality of peaks and troughs, and the peaks of the two corrugated plates correspond to each other and the troughs correspond to each other; Each peak and trough is directed from the upper part of the inclined wall support plate to the lower part of the inclined wall support plate; The lower surface of each peak of the upper corrugated plate and the lower corrugated plate is uniformly provided with a plurality of expansion beams, the two ends of the expansion beam abut against the two side surfaces of the peak, and the angle of the peak is adjusted by the expansion beam; The trough of the lower corrugated plate is slidably connected with a guide rail groove, and a plurality of guide rail grooves are transversely arranged on the upper surface of the inclined wall support plate.

2. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The bottom of the integrated AO reactor is provided with a sludge discharge port, the sludge discharge port is connected with a sludge reflux pump and a sludge discharge pipe in parallel through a pipeline; The inlet of the sludge reflux pump is connected with the sludge discharge port, the outlet of the sludge reflux pump is connected with the influent zone through a sludge reflux pipe, and part of the sludge is refluxed to the bottom of the outer cylinder so as to rise to the anoxic zone.

3. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The top and bottom of the outer cylinder are both provided with openings, the cylinder wall of the outer cylinder comprises a vertical wall, an inclined wall, a contraction wall and an expansion wall from top to bottom, the vertical wall, the contraction wall and the cylinder wall of the inner cylinder are all vertical and flat, the inclined wall is inclined towards the inside of the integrated AO reactor, so that the inner diameter of the outer cylinder is contracted, and the expansion wall is inclined towards the outside of the integrated AO reactor, so that the inner diameter of the outer cylinder is increased; The bottom opening of the inner cylinder is located in the range of the inclined wall, and the gap between the bottom opening of the inner cylinder and the inclined wall is a nitrification liquid reflux slit, the lower part of the nitrification liquid reflux slit to the bottom end of the contraction wall is the anoxic zone, and the nitrification liquid of the nitrification liquid reflux zone is input into the anoxic zone through the nitrification liquid reflux slit; The bottom of the expansion wall is provided with a water distributor, and the upper part of the water distributor is the influent zone.

4. The integrated AO reactor with sludge-water separation function according to claim 3, characterized in that, The inlet of the water distributor is connected with an influent pipe, and the wastewater to be treated is input from the outside; the influent zone is provided with a stirrer for stirring the wastewater input by the water distributor, so that the wastewater is spirally raised and then enters the anoxic zone.

5. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The anoxic zone is internally provided with a first microbial carrier and is loaded with anoxic microorganisms, and when the wastewater spirally raised from the influent zone passes through the anoxic zone, anoxic biochemical treatment is performed.

6. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The aeration pipe is connected with an aeration blower outside the reactor through a pipeline; the aerobic zone is internally provided with a second microbial carrier and loaded with aerobic microorganisms, and when the wastewater rising from the anoxic zone passes through the aerobic zone, aerobic biochemical treatment is performed.

7. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The top of the nitration liquid reflux zone is provided with a screen, the outer side edge of the screen is connected with the top edge of the outer cylinder, and the inner side edge of the screen is connected with the top edge of the inner cylinder.

8. The integrated AO reactor with sludge-water separation function according to claim 1, characterized in that, The bottom of each wave crest of the lower corrugated plate is uniformly provided with a plurality of telescopic vertical rods for extending the lower corrugated plate and adjusting the height of the upper corrugated plate; The plurality of telescopic vertical rods are uniformly arranged on the upper surface of the inclined wall support plate along the length direction of the corresponding same wave crest, and the positions of the telescopic vertical rods do not coincide with the guide rail grooves; The bottom of the telescopic vertical rod is fixed on the inclined wall support plate, and the top is provided with an inverted U-shaped fixed support for supporting the lower surface of the wave crest of the upper corrugated plate; The wave crest of the lower corrugated plate is provided with an opening corresponding to the position of the telescopic vertical rod, allowing the telescopic vertical rod to extend up and down, and by changing the height of the telescopic vertical rod, the spacing between the upper and lower corrugated plates is adjusted.

9. The integrated AO reactor with sludge-water separation function according to claim 8, characterized in that, For the upper corrugated plate, a plurality of upper telescopic cross beams are uniformly arranged on the lower surface of the upper corrugated plate along the length direction of the corresponding same wave crest, and the positions of the upper telescopic cross beams correspond to the opening positions of the lower corrugated plate. For the lower corrugated plate, a plurality of lower telescopic cross beams are uniformly arranged on the lower surface of the lower corrugated plate along the length direction of the corresponding same wave crest, and the positions of the lower telescopic cross beams do not correspond to the opening positions.

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