Wastewater purification device based on AOA process

Abstract

The application discloses a sewage purification device based on an AOA process and particularly relates to the technical field of sewage purification, comprising a treatment tank arranged on the ground and used for treating sewage, two auxiliary components arranged on the upper part of the inner surface of the treatment tank, a stirring component one arranged below the auxiliary component on the rear side, a mixing component arranged on the middle part of the inner surface of the treatment tank, and a stirring component two arranged on the front side of the inner surface of the treatment tank. The application forms a nearly sealed anaerobic reaction space through cooperation of the intercepting plate one and the intercepting plate two, realizes a low-oxygen environment required by anaerobic reaction, avoids penetration of external oxygen to destroy anaerobic conditions, realizes continuous air suction and gas collection of the anaerobic zone and the anoxic zone through cooperation of the sliding plate, the vertical plate and the air bag, reduces the oxygen content above the anaerobic zone to guarantee reaction conditions, recycles methane generated by the anaerobic reaction, reduces nitrogen residue in the anoxic zone, and solves the problems of methane leakage pollution and sludge floating caused by nitrogen adhesion to sludge.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, and in particular to a wastewater purification device based on the AOA process. Background Technology

[0002] The core of the AOA (Anaerobic-Oxic-Anoxic) process is to adjust the sequence of reaction zones to prioritize the supply of carbon sources for phosphorus removal and eliminate the internal reflux of nitrification liquid, thereby efficiently solving the problems of carbon source competition and high energy consumption in the denitrification and phosphorus removal of wastewater with low carbon-to-nitrogen ratio.

[0003] Chinese Patent Publication No. CN206616117U discloses a mobile sewage treatment vehicle based on the A2O process. The vehicle includes a body, with a first, second, and third tank fixedly mounted on the top of the body. A first, second, and third water pump are fixedly mounted on one side of each of the first, second, and third tanks, respectively. Inlet and outlet pipes are fixedly mounted on both sides of each of the first, second, and third water pumps, respectively. The inlet and outlet pipes on both sides of the first water pump are fixedly connected to the first and second tanks, respectively. This patent has a reasonable structural design, is simple to operate, and can effectively improve the sewage purification effect and efficiency.

[0004] During operation, the above-mentioned device can only stir and mix the sewage, but cannot achieve continuous aeration and gas collection in the anaerobic and anoxic zones. This not only reduces the oxygen content above the anaerobic zone to ensure reaction conditions, but also recovers the methane produced by the anaerobic reaction and reduces nitrogen residue in the anoxic zone, thus solving the problems of methane leakage pollution and nitrogen adhering to sludge causing sludge to float. Summary of the Invention

[0005] The main objective of this invention is to provide a wastewater purification device based on the AOA process, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A wastewater treatment device based on the AOA process includes a treatment tank installed on the ground for treating wastewater. The treatment tank has an inlet for conveying wastewater at its upper rear end and an outlet for discharging treated wastewater at its lower front end. Two auxiliary components are installed on the upper part of the inner surface of the treatment tank. A stirring component one for slowly mixing wastewater from the anaerobic zone is located below the rear auxiliary component. An aeration component for continuously supplying air to the aerobic zone is installed on the bottom wall of the middle part of the inner surface of the treatment tank. A mixing component for mixing wastewater from the aerobic zone is located in the middle of the inner surface of the treatment tank. A stirring component two for mixing wastewater from the anoxic zone is located at the front of the inner surface of the treatment tank.

[0007] Preferably, an interceptor plate one is fixedly installed on the rear side of the bottom wall of the inner surface of the treatment tank, an interceptor plate two is fixedly installed in the middle of the bottom wall of the inner surface of the treatment tank, an interceptor plate three is fixedly installed on the front side of the bottom wall of the inner surface of the treatment tank, a plurality of conical channels are opened on the rear side of the bottom wall of the inner surface of the treatment tank, a water supply pipe is provided on the side of the bottom wall of the inner surface of the treatment tank where the interceptor plate one and the interceptor plate two are close to each other, and a stepped grid for filtering impurities in sewage is fixedly connected to the left and right walls of the inner surface of the treatment tank.

[0008] Preferably, the auxiliary component includes a horizontal plate that is slidably connected to the left and right walls of the inner surface of the treatment tank. A sealing box for protecting the internal structure is fixedly installed at the upper end of the horizontal plate, and the upper middle part of the sealing box is connected to a hydraulic drive structure in the prior art. A motor is fixedly installed at the middle of the top wall of the inner surface of the sealing box, and a cam is fixedly installed on the lower side of the output end of the motor.

[0009] Preferably, the auxiliary component further includes symmetrically fixedly installed limiting plates on the upper end of the horizontal plate, with two limiting plates slidably mounted on a sliding plate. A rectangular groove is provided in the middle of the upper end of the sliding plate, and the output shaft of the first motor is located on the inner surface of the rectangular groove. A circular roller is symmetrically rotatably mounted on the lower end of the sliding plate, with the outer surface of the first circular roller on the left side in close contact with the outer surface of the cam. Vertical plates are symmetrically installed on the lower end of the sliding plate, with two vertical plates located on the side away from each other of the two limiting plates. Fixed plates are symmetrically fixedly installed on the upper end of the horizontal plate, with airbags fixedly installed on the side of the two fixed plates close to each other and on the same side of the vertical plates. A hose is fixedly installed on the rear side of the outer surface of the two airbags, and a hose is fixedly installed on the front side of the outer surface of the two airbags. A spray plate is fixedly installed in the middle of the lower end of the horizontal plate, with the end of the hose away from the airbag fixedly connected to the upper end of the spray plate.

[0010] Preferably, the stirring assembly includes two rotating rollers, which are rotatably connected to the upper end of the horizontal plate located at the rear. The two rotating rollers are connected to each other by a belt pulley transmission device in the prior art. At the same time, the outer surface of the rotating roller on the right side is connected to the outer surface of the output shaft of the motor located at the rear by a belt pulley transmission device in the prior art. The lower ends of the two rotating rollers pass through the upper end of the horizontal plate and extend to the lower part of the horizontal plate. A limit roller is fixedly installed at the lower end of each of the two rotating rollers.

[0011] Preferably, the stirring assembly one further includes two circular rollers two rotatably mounted on the bottom wall of the inner surface of the treatment tank. The outer surfaces of the two circular rollers two are spirally arrayed with several stirring rods, and the spiral directions of the outer surfaces of the two circular rollers two are opposite. The upper ends of the two circular rollers two are respectively in close contact with the outer surface of the limiting roller one on the same side. The middle of the rear end of the intercepting plate two is provided with anaerobic packing material that mixes and reacts with sewage.

[0012] Preferably, the aeration assembly includes two rectangular frames rotatably mounted on the middle of the inner surface of the treatment tank. A motor is fixedly mounted on the right end of each of the two rectangular frames. The two rectangular frames are positioned between the first and second interceptor plates and the aerobic zone formed by the inner surface of the treatment tank.

[0013] Preferably, the aeration assembly further includes two aeration pipe groups, which are respectively fixedly connected to the left side wall of the inner surface of the treatment tank. The right side of the two aeration pipe groups is fixedly connected to an air supply pipe, and the end of the air supply pipe away from the aeration pipe group is connected to the aeration structure in the prior art.

[0014] Preferably, the mixing component includes two guide plates 1, which are rotatably connected to the lower side of the left and right side walls of the inner surface of the treatment tank, respectively. Each of the two guide plates 1 has several through holes 1 at its upper end. Two guide plates 2 are rotatably installed in the middle of the left and right side walls of the inner surface of the treatment tank. Each of the two guide plates 2 has several through holes 2 at its upper end. Two guide plates 3 are rotatably installed in the upper part of the left and right side walls of the inner surface of the treatment tank. Each of the two guide plates 3 has several through holes 3 at its upper end, and the inner diameter of the several through holes 3 is larger than the inner diameter of the several through holes 2 and larger than the inner diameter of the several through holes 1.

[0015] Preferably, the stirring assembly includes two rotating rollers, which are rotatably connected to the upper end of the front horizontal plate. The lower ends of the two rotating rollers penetrate the upper end of the horizontal plate and extend to the lower part of the horizontal plate. Limiting rollers are fixedly installed at the lower ends of the two rotating rollers. A stirrer is provided on the lower side of the outer surface of the two limiting rollers, and the lower ends of the two stirrers are rotatably connected to the bottom wall of the inner surface of the treatment tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention forms a near-sealed anaerobic reaction space through the cooperation of interceptor plate one and interceptor plate two, achieving the low-oxygen environment required for anaerobic reaction and preventing external oxygen from seeping in and disrupting anaerobic conditions. Furthermore, through the cooperation of sliding plate, vertical plate, and airbag, continuous air intake and gas collection are achieved in the anaerobic and anoxic zones. This not only reduces the oxygen content above the anaerobic zone to ensure reaction conditions, but also recovers the methane produced by the anaerobic reaction and reduces nitrogen residue in the anoxic zone, solving the problems of methane leakage pollution and nitrogen adhering to sludge causing sludge to float.

[0017] 2. This invention uses a driving stirring rod to form a bidirectional vortex flow to stir the wastewater in the anaerobic zone, achieving full contact between the wastewater and the anaerobic packing material. This avoids short-circuit flow of wastewater and the occurrence of dead zones in the reaction. At the same time, the vortex shear force breaks down large molecular pollutants. Furthermore, the rectangular frame and the multi-layer guide plates of the mixing components, along with through holes of different diameters, drive the wastewater to form a spiral upward flow, which in turn drives the sludge in dead corners to flow and disperse the wastewater. This prevents sludge from settling at the bottom of the tank and affecting the treatment effect, while also preventing the sludge flocs from breaking down and ensuring the activity of microorganisms in the aerobic zone. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the treatment pool of the present invention; Figure 4 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 5 This is a bottom view of the auxiliary component structure of the present invention; Figure 6 This is a schematic diagram of the stirring assembly of the present invention; Figure 7 This is a schematic diagram of the aeration component structure of the present invention; Figure 8 This is a schematic diagram of the hybrid component structure of the present invention; Figure 9 This is a schematic diagram of the second stirring component of the present invention.

[0019] In the diagram: 1. Treatment tank; 11. Stepped grating; 12. Conical channel; 13. Water supply pipe; 14. Interception plate one; 15. Interception plate two; 16. Interception plate three; 2. Auxiliary components; 21. Sealing box; 22. Horizontal plate; 23. Motor one; 24. Cam; 25. Slide plate; 251. Vertical plate; 252. Circular roller one; 253. Rectangular channel; 26. Limiting plate; 27. Fixing plate; 28. Airbag; 281. Hose one; 282. Hose two; 29. ​​Spray plate; 3. Stirring 31. Mixing Component 1; 32. Rotating Roller 1; 33. Limiting Roller 1; 34. Circular Roller 2; 35. Anaerobic Packing Material; 4. Stirring Rod; 4. Aeration Component; 41. Motor 2; 42. Rectangular Frame; 43. Air Supply Pipe; 44. Aeration Pipe Assembly; 5. Mixing Component; 51. Guide Plate 1; 511. Through Hole 1; 52. Guide Plate 2; 521. Through Hole 2; 53. Guide Plate 3; 531. Through Hole 3; 6. Stirring Component 2; 61. Rotating Roller 2; 62. Limiting Roller 2; 63. Agitator. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figure 1 and Figure 2 As shown, the wastewater purification device based on the AOA process includes a treatment tank 1 installed on the ground for treating wastewater. The treatment tank 1 has an inlet for conveying wastewater on the upper rear side and an outlet for discharging treated wastewater on the lower front side. Two auxiliary components 2 are installed on the upper inner surface of the treatment tank 1. A stirring component 3 for slowly mixing wastewater in the anaerobic zone is installed below the rear auxiliary component 2. An aeration component 4 for continuously supplying air to the aerobic zone is installed on the bottom wall in the middle of the inner surface of the treatment tank 1. A mixing component 5 for mixing wastewater in the aerobic zone is installed in the middle of the inner surface of the treatment tank 1. A stirring component 6 for mixing wastewater in the anoxic zone is installed on the front side of the inner surface of the treatment tank 1.

[0022] When treating organic wastewater discharged from industries such as chemical processing, food processing, and printing and dyeing, the wastewater is introduced through the inlet into the rear side of the inner surface of the treatment tank 1. It passes through the stirring component 3 and the auxiliary component 2 located at the rear side, which converts the recalcitrant organic pollutants in the wastewater into easily degradable small molecule organic matter. The aeration component 4 and the mixing component 5 are used to convert the ammonia nitrogen in the wastewater after the previous stage of treatment into nitrate nitrogen. At the same time, phosphorus in the wastewater is absorbed by polyphosphate-accumulating bacteria. The auxiliary component 2 and the stirring component 6 located at the front side are used to further degrade the residual organic pollutants in the wastewater.

[0023] like Figure 3 A first interceptor plate 14 is fixedly installed on the rear side of the bottom wall of the inner surface of the treatment tank 1. A second interceptor plate 15 is fixedly installed in the middle of the bottom wall of the inner surface of the treatment tank 1. A third interceptor plate 16 is fixedly installed on the front side of the bottom wall of the inner surface of the treatment tank 1. Through the cooperation of the first interceptor plate 14, the second interceptor plate 15, and the third interceptor plate 16 with the inner surface of the treatment tank 1, the inner surface of the treatment tank 1 is divided into a sewage pretreatment zone, an anaerobic treatment zone, an aerobic treatment zone, and an anoxic treatment zone in sequence. Several conical channels 12 are opened on the rear side of the bottom wall of the inner surface of the treatment tank 1. A water supply pipe 13 is set on the bottom wall of the inner surface of the treatment tank 1 on the side where the first interceptor plate 14 and the second interceptor plate 15 are close to each other. The lower side of the outer surface of the water supply pipe 13 is connected to several conical channels 12 through a delivery pump. The left and right walls of the inner surface of the treatment tank 1 are fixedly connected with stepped grids 11 for filtering impurities in sewage.

[0024] Furthermore, both interceptor plate 2 (15) and interceptor plate 3 (16) are equipped with several conveying pipes and suitable conveying pumps at their lower ends for conveying sewage from different treatment areas.

[0025] The fixed connection between the stepped bar screen 11 and the inner surface of the treatment tank 1 includes, but is not limited to, the slot fixing commonly used in the prior art. It is only necessary to ensure that the stepped bar screen 11 is fixed to the inner surface of the treatment tank 1 during the sewage treatment process, and that the stepped bar screen 11 can be removed for cleaning periodically.

[0026] Specifically, the wastewater pretreatment zone is formed by the rear end of the first interceptor plate 14 and the inner surface of the treatment tank 1. When the wastewater to be treated enters the rear side of the inner surface of the treatment tank 1 through the inlet at the rear end of the treatment tank 1, the wastewater is filtered and intercepted by the stepped grid 11 and then enters the lower end of the stepped grid 11. Then, the conveying pump between the water conveying pipe 13 and several conical channels 12 operates, and the wastewater filtered and intercepted by the stepped grid 11 is conveyed through the conical channels 12 and the water conveying pipe 13 to the anaerobic zone between the first interceptor plate 14 and the second interceptor plate 15 for the conversion treatment of organic pollutants.

[0027] like Figure 4 and Figure 5 The auxiliary component 2 includes a horizontal plate 22 that is slidably connected to the left and right walls of the inner surface of the treatment tank 1. A sealing box 21 that protects the internal structure is fixedly installed on the upper end of the horizontal plate 22, and the upper middle part of the sealing box 21 is connected to the hydraulic drive structure in the prior art. When treating the sewage in the anaerobic zone and the anoxic zone, the sealing box 21 and the horizontal plate 22 are driven to descend by the hydraulic drive structure to ensure the reaction conditions in the anaerobic zone and the anoxic zone. A motor 23 is fixedly installed on the middle part of the top wall of the inner surface of the sealing box 21, and a cam 24 is fixedly installed on the lower side of the output end of the motor 23.

[0028] Furthermore, when sewage enters between interceptor plate 14 and interceptor plate 25, the hydraulic drive structure in the prior art pushes the sealing box 21 and the horizontal plate 22 located on the rear side downward. After the horizontal plate 22 descends to the appropriate position, a near-sealed reaction area is formed between the horizontal plate 22 located on the rear side, interceptor plate 14, interceptor plate 25, and the inner surface of the treatment tank 1. At the same time, as the horizontal plate 22 descends, it will drive the motor 23 and cam 24 and other structures to descend simultaneously.

[0029] like Figure 4 and Figure 5 The auxiliary component 2 also includes a limiting plate 26 symmetrically fixedly installed on the upper end of the horizontal plate 22. The two limiting plates 26 are slidably mounted on a slide plate 25. A rectangular groove 253 is opened in the middle of the upper end of the slide plate 25. The output shaft of the motor 23 is located on the inner surface of the rectangular groove 253. A circular roller 252 is symmetrically rotatably mounted on the lower end of the slide plate 25. The outer surface of the left circular roller 252 is in close contact with the outer surface of the cam 24. Vertical plates 251 are symmetrically mounted on the lower end of the slide plate 25. The two vertical plates 251 are located on the side of the two limiting plates 26 that are far apart from each other.

[0030] Specifically, after the horizontal plate 22 located on the rear side descends to a suitable height, the motor 23 on the same side is activated, causing the output shaft of the motor 23 to drive the cam 24 to rotate. Similarly, during the rotation of the cam 24, the two rollers 252 run along the outer surface of the cam 24, and the two limiting plates 26 limit the slide plate 25. Thus, for each rotation of the cam 24, the rollers 252 are pushed to drive the slide plate 25 to move left and right three times. When the slide plate 25 moves left and right, it drives the two vertical plates 251 to move in the same direction.

[0031] Furthermore, during the left and right movement of the slide plate 25, the output shaft of motor 23 is always located on the inner surface of the rectangular groove 253, meaning that the left and right movement of the slide plate 25 and the rotation of the output shaft of motor 23 do not interfere with each other.

[0032] like Figure 5 A fixing plate 27 is symmetrically fixedly installed on the upper end of the horizontal plate 22. The two fixing plates 27 are close to each other on one side and together with the vertical plate 251 on the same side, airbags 28 are fixedly installed. A hose 1 281 is fixedly installed on the rear side of the outer surface of the two airbags 28. A hose 282 is fixedly installed on the front side of the outer surface of the two airbags 28. A spray plate 29 is fixedly installed in the middle of the lower end of the horizontal plate 22. The end of the hose 1 281 away from the airbag 28 is fixedly connected to the upper end of the spray plate 29.

[0033] Furthermore, as the skateboard 25 moves the two vertical boards 251 left and right, it will cooperate with the fixed plate 27 on the same side to compress one airbag 28 while stretching the other airbag 28. This ensures that as the skateboard 25 moves the two vertical boards 251, one of the two airbags 28 will always continuously draw in air through hose 1 281, while the other will expel internal gas through hose 282.

[0034] It should be noted that the lower end of the spray plate 29 is provided with several nozzles, and one-way air inlet valves are provided at the connection points of the two airbags 28 and the first hose 281. At the same time, one-way air outlet valves are provided at the connection points of the two airbags 28 and the second hose 282. The end of the second hose 282 away from the airbags 28 is connected to the existing air collection tank.

[0035] Furthermore, during the anaerobic reaction of wastewater, in order to meet the reaction conditions in the anaerobic zone, motor 23 is activated, thereby enabling one of the airbags 28 to continuously draw in air through hose 281 and a one-way air inlet valve, along with spray plate 29 and several nozzles. This reduces the oxygen content above the wastewater in the anaerobic zone while drawing in gases such as methane produced by the anaerobic reaction into the airbag 28. At the same time, another airbag 28 is squeezed and, through hose 282 and in conjunction with a one-way air outlet valve, discharges the methane and other gases drawn in from the airbag 28 into the gas collection tank in the prior art.

[0036] like Figure 6The stirring assembly 3 includes two rotating rollers 31, which are rotatably connected to the upper end of the horizontal plate 22 located on the rear side. The two rotating rollers 31 are connected by a belt pulley transmission device in the prior art. At the same time, the outer surface of the rotating roller 31 on the right side is connected to the outer surface of the output shaft of the motor 23 located on the rear side by a belt pulley transmission device in the prior art. The lower ends of the two rotating rollers 31 pass through the upper end of the horizontal plate 22 and extend to the lower part of the horizontal plate 22. Limiting rollers 32 are fixedly installed at the lower ends of the two rotating rollers 31.

[0037] Similarly, when the horizontal plate 22 located at the rear is pushed down, it will drive the two rotating rollers 31 to descend simultaneously.

[0038] Furthermore, it should be noted that the belt drive connection between the outer surface of the output shaft of the motor 23 and the outer surface of the roller 31 is a speed reduction drive, that is, the speed of the output shaft of the motor 23 is greater than the speed of the roller 31.

[0039] like Figure 6 The stirring assembly 3 also includes two circular rollers 33 rotatably mounted on the bottom wall of the inner surface of the treatment tank 1. The outer surfaces of the two circular rollers 33 are spirally arrayed with several stirring rods 35, and the spiral directions of the outer surfaces of the two circular rollers 33 are opposite. The upper ends of the two circular rollers 33 are respectively in close contact with the outer surface of the limiting roller 32 on the same side. The middle of the rear end of the intercepting plate 15 is provided with anaerobic packing material 34 that reacts with sewage.

[0040] Specifically, in order to avoid dead zones in the anaerobic wastewater reaction, during the mixing and reaction process of the wastewater in the anaerobic zone with the internal packing material of the anaerobic packing 34, a motor 23 with two rotating rollers 31 is used. During the operation of the motor 23, the two rotating rollers 31 rotate slowly.

[0041] Similarly, during the process of the horizontal plate 22 driving the two rotating rollers 31 to descend, the rotating rollers 31 drive the matching limiting rollers 32 to descend and are locked in place at the upper end of the circular rollers 33 on the same side. In addition, the output shaft of the motor 23 drives the cam 24 to rotate, and then through the slide plate 25 and other structures, the area between the intercepting plate 14 and the intercepting plate 15 is sucked up. During this process, the two rotating rollers 31 drive the matching limiting rollers 32 and the circular rollers 33 to rotate slowly, stirring the sewage behind the anaerobic zone, ensuring that the sewage reacts and combines fully with the packing material inside the anaerobic packing 34.

[0042] Similarly, as the two circular rollers 33 are driven to rotate, they will drive the matching stirring rollers 35 to rotate. As the two sets of stirring rollers 35 with opposite spiral directions rotate, they will drive the sewage to form a bidirectional vortex flow. On the one hand, this avoids short-circuit flow of sewage and ensures that the sewage and anaerobic packing 34 are in full contact. On the other hand, the shearing force generated by the reverse vortex can break down large molecular organic pollutants in the sewage and ensure that the reaction is complete.

[0043] like Figure 7 The aeration component 4 includes two rectangular frames 42 rotatably mounted in the middle of the inner surface of the treatment tank 1. A motor 41 is fixedly mounted on the right end of each of the two rectangular frames 42. The two rectangular frames 42 are positioned between the interceptor plate 14 and the interceptor plate 15 and the aerobic zone formed by the inner surface of the treatment tank 1.

[0044] The two motors 41 are fixedly installed on the lower right side of the treatment tank 1, and the output ends of the two motors 41 extend through the right end of the treatment tank 1 to the inner surface of the treatment tank 1.

[0045] Furthermore, after the wastewater treatment in the anaerobic zone is completed, the wastewater is transported to the aerobic zone formed by the interceptor plate 2 15 and the interceptor plate 3 16 and the inner surface of the treatment tank 1 through several transfer pumps and suitable transfer pipes at the lower end of the interceptor plate 2 15 for the next step of wastewater treatment.

[0046] Furthermore, during the wastewater treatment process in the aerobic zone, the two motors 41 operate intermittently, driving the two rectangular frames 42 to rotate slowly and intermittently for a period of time before stopping, in order to prevent the sludge flocs from breaking.

[0047] like Figure 7 The aeration assembly 4 also includes two aeration pipe groups 44. The two aeration pipe groups 44 are fixedly connected to the left side wall of the inner surface of the treatment tank 1 respectively. The right side of the two aeration pipe groups 44 is fixedly connected to an air supply pipe 43, and the end of the air supply pipe 43 away from the aeration pipe group 44 is connected to the aeration structure in the prior art.

[0048] When the wastewater from the anaerobic zone is transported between interceptor plate 2 15 and interceptor plate 3 16, the existing aeration structure operates, continuously supplying air to the two aeration pipe groups 44 through the air supply pipe 43. As the wastewater enters between interceptor plate 2 15 and interceptor plate 3 16 and the water level rises, it mixes with the air supplied by the two aeration pipe groups 44. The mixing of the air supplied by the two aeration pipe groups 44 also promotes the flow and mixing of the wastewater.

[0049] like Figure 8 The mixing component 5 includes two guide plates 51, which are rotatably connected to the lower side of the left and right walls of the inner surface of the treatment tank 1, respectively. Each of the two guide plates 51 has several through holes 511 at its upper end. Two guide plates 52 are rotatably installed in the middle of the left and right walls of the inner surface of the treatment tank 1. Each of the two guide plates 52 has several through holes 521 at its upper end. Two guide plates 53 are rotatably installed in the upper part of the left and right walls of the inner surface of the treatment tank 1. Each of the two guide plates 53 has several through holes 531 at its upper end. The inner diameter of the several through holes 531 is larger than the inner diameter of the several through holes 521 and larger than the inner diameter of the several through holes 511.

[0050] It should be noted that the two guide vanes 1 51, the two guide vanes 2 52, and the two guide vanes 3 53 are all inclined at 15 degrees. At the same time, aerobic packing is provided at the lower end of the two guide vanes 1 51, the two guide vanes 2 52, and the two guide vanes 3 53.

[0051] Furthermore, between and after the sewage enters the interceptor plate 2 15 and the interceptor plate 3 16, the sewage reacts with the air introduced by the two aeration pipe groups 44 and the aerobic packing material set at the lower end of the two guide plates 1 51, two guide plates 2 52 and two guide plates 3 53, converting ammonia nitrogen in the sewage into nitrate nitrogen, thus achieving simultaneous nitrification and phosphorus uptake.

[0052] When sewage enters between interceptor plate 2 15 and interceptor plate 3 16, the flowing sewage is dispersed into multiple fine streams by the cooperation of two guide plates 1 51 and several small-diameter through holes 511, and the sewage fine streams are evenly dispersed to prevent the sewage from staying on the inner surface and bottom wall of the treatment tank 1.

[0053] Meanwhile, during the sewage treatment process, two guide plates 51, two guide plates 52, and two guide plates 53 work together to divide the aerobic zone into three layers. With the help of through holes 521 and 531 of different diameters, the rectangular frame 42 is slowly rotated by motor 41 to promote the flow of sewage. The water flows through the holes to form a spiral upward flow, which drives the sludge in the dead corner to flow. At the same time, several through holes 521, 531, and 511 are used to disperse the sewage.

[0054] like Figure 9 The stirring assembly 26 includes two rotating rollers 261, which are rotatably connected to the upper end of the front horizontal plate 22. The lower ends of the two rotating rollers 261 pass through the upper end of the horizontal plate 22 and extend to the lower part of the horizontal plate 22. Limiting rollers 262 are fixedly installed at the lower ends of the two rotating rollers 261. Agitators 63 are provided on the lower side of the outer surface of the two limiting rollers 262, and the lower ends of the two agitators 63 are rotatably connected to the bottom wall of the inner surface of the treatment tank 1.

[0055] Similarly, the two rollers 61 are connected by a belt pulley transmission device in the prior art, and the outer surface of the roller 61 on the right side is connected to the outer surface of the output shaft of the motor 23 on the front side by a belt pulley transmission device in the prior art.

[0056] It should be noted that the front end of the interceptor plate 316 is equipped with a packing layer required for the treatment of wastewater in the anoxic zone.

[0057] Furthermore, after the wastewater in the aerobic zone is treated, several transfer pumps at the lower end of the interceptor plate 316, in conjunction with suitable transfer pipes, transport the wastewater from the aerobic zone to the anoxic zone formed between the interceptor plate 316 and the front side of the inner surface of the treatment tank 1 for the next step of the operation.

[0058] Similarly, when treating wastewater in anoxic zones, the sealing box 21 and the horizontal plate 22 located at the front are pushed down to the appropriate position by the hydraulic drive structure in the prior art. At the same time, the horizontal plate 22 located at the front drives the rotating roller 61 and the limiting roller 62 to descend, so that the two limiting rollers 62 are respectively engaged and fixed with the matching agitator 63.

[0059] Furthermore, when treating wastewater in the anoxic zone, the output shaft of the motor 23 located at the front drives the two rotating rollers 61 to rotate slowly, thereby enabling the two agitators 63 to slowly stir the wastewater in the anoxic zone, ensuring that the wastewater reacts fully with the suitable packing material.

[0060] Furthermore, during the wastewater treatment process in the anoxic zone, nitrogen gas is continuously generated. To prevent nitrogen gas from adhering to the sludge surface and causing the sludge to rise, the motor 23 located at the front continues to operate. Consequently, the cam 24 located at the front is driven to work with the two rollers 252, causing the slide plate 25 located at the front to move back and forth. As a result, the spray plate 29 located at the front continuously draws in air through several nozzles, reducing the nitrogen content in the wastewater in the anoxic zone.

[0061] After the reaction in the anoxic zone is completed, the treated wastewater is transported to the disinfection and testing structure in the prior art through the outlet at the lower front of the treatment tank 1. After the test meets the standards, the wastewater can be discharged.

[0062] It should be noted that the specific installation method, circuit connection method, and control method of motor 23 and motor 41 used in this invention are all conventional designs, and will not be described in detail in this invention.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater purification device based on AOA technology, comprising a treatment tank (1) installed on the ground for treating wastewater, wherein an inlet for conveying wastewater is provided on the upper rear side of the treatment tank (1), and an outlet for discharging treated wastewater is provided on the lower front side of the treatment tank (1), characterized in that: Two auxiliary components (2) are provided on the upper part of the inner surface of the treatment tank (1). A stirring component (3) for slowly mixing anaerobic wastewater is provided below the auxiliary component (2) on the rear side. An aeration component (4) for continuously supplying air to the aerobic zone is provided on the bottom wall of the middle part of the inner surface of the treatment tank (1). A mixing component (5) for mixing aerobic wastewater is provided in the middle part of the inner surface of the treatment tank (1). A stirring component (6) for mixing anoxic wastewater is provided on the front side of the inner surface of the treatment tank (1).

2. The wastewater purification device based on AOA process according to claim 1, characterized in that: A first interceptor plate (14) is fixedly installed on the rear side of the bottom wall of the inner surface of the treatment tank (1). A second interceptor plate (15) is fixedly installed in the middle of the bottom wall of the inner surface of the treatment tank (1). A third interceptor plate (16) is fixedly installed on the front side of the bottom wall of the inner surface of the treatment tank (1). Several conical channels (12) are opened on the rear side of the bottom wall of the inner surface of the treatment tank (1). A water supply pipe (13) is provided on the bottom wall of the inner surface of the treatment tank (1) on the side where the first interceptor plate (14) and the second interceptor plate (15) are close to each other. A stepped grid (11) for filtering impurities in sewage is fixedly connected to the left and right walls of the inner surface of the treatment tank (1).

3. The wastewater purification device based on AOA process according to claim 2, characterized in that: The auxiliary component (2) includes a horizontal plate (22) that is slidably connected to the left and right walls of the inner surface of the treatment tank (1). A sealing box (21) for protecting the internal structure is fixedly installed on the upper end of the horizontal plate (22), and the middle part of the upper end of the sealing box (21) is connected to the hydraulic drive structure in the prior art. A motor (23) is fixedly installed on the middle part of the top wall of the inner surface of the sealing box (21), and a cam (24) is fixedly installed on the lower side of the output end of the motor (23).

4. The wastewater purification device based on AOA process according to claim 3, characterized in that: The auxiliary component (2) also includes a limiting plate (26) symmetrically fixedly installed on the upper end of the horizontal plate (22). The two limiting plates (26) are slidably mounted on a sliding plate (25). A rectangular groove (253) is provided in the middle of the upper end of the sliding plate (25). The output shaft of the motor (23) is located on the inner surface of the rectangular groove (253). A circular roller (252) is symmetrically rotated and mounted on the lower end of the sliding plate (25). The outer surface of the circular roller (252) on the left side is in close contact with the outer surface of the cam (24). Vertical plates (251) are symmetrically mounted on the lower end of the sliding plate (25). The two vertical plates (251) are located on two... On the side of the limiting plates (26) that are far apart from each other, the upper end of the horizontal plate (22) is symmetrically fixed with fixing plates (27). On the side of the two fixing plates (27) that are close to each other, airbags (28) are fixedly installed together with the vertical plate (251) on the same side. The rear side of the outer surface of the two airbags (28) is fixedly installed with hose one (281). The front side of the outer surface of the two airbags (28) is fixedly installed with hose two (282). The middle part of the lower end of the horizontal plate (22) is fixedly installed with a spray plate (29). The end of hose one (281) that is far away from the airbag (28) is fixedly connected to the upper end of the spray plate (29).

5. The wastewater purification device based on AOA process according to claim 3, characterized in that: The stirring assembly (3) includes two rotating rollers (31). The two rotating rollers (31) are rotatably connected to the upper end of the horizontal plate (22) located on the rear side, and the two rotating rollers (31) are connected by a belt pulley transmission device in the prior art. At the same time, the outer surface of the rotating roller (31) on the right side is connected to the outer surface of the output shaft of the motor (23) located on the rear side by a belt pulley transmission device in the prior art. The lower ends of the two rotating rollers (31) penetrate through the upper end of the horizontal plate (22) and extend to the lower part of the horizontal plate (22). The lower ends of the two rotating rollers (31) are fixedly installed with limit rollers (32).

6. The wastewater purification device based on AOA process according to claim 5, characterized in that: The stirring assembly (3) further includes two circular rollers (33) rotatably mounted on the bottom wall of the inner surface of the treatment tank (1). The outer surfaces of the two circular rollers (33) are spirally arrayed with several stirring rods (35), and the spiral directions of the outer surfaces of the two circular rollers (33) are opposite. The upper ends of the two circular rollers (33) are respectively in close contact with the outer surface of the limiting roller (32) on the same side. The middle of the rear end of the interceptor plate (15) is provided with anaerobic packing material (34) that reacts with sewage.

7. The wastewater purification device based on AOA process according to claim 2, characterized in that: The aeration assembly (4) includes two rectangular frames (42) rotatably installed in the middle of the inner surface of the treatment tank (1). Motor 2 (41) is fixedly installed on the right end of each of the two rectangular frames (42). At the same time, the two rectangular frames (42) are set between the interceptor plate 1 (14) and the interceptor plate 2 (15) and the aerobic zone formed by the inner surface of the treatment tank (1).

8. The wastewater purification device based on AOA process according to claim 7, characterized in that: The aeration assembly (4) also includes two aeration pipe groups (44), which are fixedly connected to the left side wall of the inner surface of the treatment tank (1) respectively. The right side of the two aeration pipe groups (44) is fixedly connected to an air supply pipe (43), and the end of the air supply pipe (43) away from the aeration pipe group (44) is connected to the aeration structure in the prior art.

9. The wastewater purification device based on AOA process according to claim 1, characterized in that: The mixing component (5) includes two guide plates (51), which are rotatably connected to the lower side of the left and right walls of the inner surface of the treatment tank (1). The upper ends of the two guide plates (51) are provided with several through holes (511). The middle of the left and right walls of the inner surface of the treatment tank (1) is rotatably installed with two guide plates (52), which are provided with several through holes (521) at their upper ends. The upper part of the left and right walls of the inner surface of the treatment tank (1) is rotatably installed with two guide plates (53), which are provided with several through holes (531) at their upper ends. The inner diameter of the several through holes (531) is larger than the inner diameter of the several through holes (521) and larger than the inner diameter of the several through holes (511).

10. The wastewater purification device based on AOA process according to claim 3, characterized in that: The stirring assembly 2 (6) includes two rotating rollers 2 (61), which are rotatably connected to the upper end of the front horizontal plate (22). The lower ends of the two rotating rollers 2 (61) penetrate the upper end of the horizontal plate (22) and extend to the lower part of the horizontal plate (22). The lower ends of the two rotating rollers 2 (61) are fixedly installed with limiting rollers 2 (62). The lower side of the outer surface of the two limiting rollers 2 (62) is provided with a stirrer (63), and the lower ends of the two stirrers (63) are rotatably connected to the bottom wall of the inner surface of the treatment tank (1).

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