Sewage treatment system

Abstract

The invention relates to the technical field of rural domestic sewage treatment, in particular to a sewage treatment system. Comprising an aeration tank, a sliding part is arranged at the upper end of the aeration tank, and a plurality of defoaming and slag blocking assemblies are arranged at the lower end of the sliding part; the defoaming and slag blocking assembly comprises an upper conical block fixed to the lower end of the sliding piece, an upper conical ring is rotationally arranged on the outer edge of the upper conical block in an embedded mode, bristles are fixed to the outer edge of the upper conical ring, a lower conical block is concentrically arranged below the upper conical block, and the upper end of the upper conical block is fixedly connected with the lower end of the lower conical block through a plurality of fixing rods; a lower conical ring is rotationally embedded in the outer edge of the lower conical block, a stirring and conveying assembly is arranged at the lower end of the upper conical block, and a vortex elastic piece is arranged on the outer side of the lower conical ring. According to the system, bubbles and scum on the liquid level of sewage are actively sucked through the stirring and conveying assembly and conveyed into the vortex storage tank, in the vortex storage tank, the bubbles are broken, liquid flows back to the aeration tank through the filter screen, the surface of the sewage is prevented from being covered with the bubbles, and it is ensured that air makes direct contact with the sewage.

Description

Technical Field

[0001] This invention relates to the field of rural domestic sewage treatment technology, specifically to a sewage treatment system. Background Technology

[0002] Rural living environment improvement has become a core task of rural development. Among these efforts, domestic sewage treatment is a crucial link in improving the rural ecological environment, playing an irreplaceable role, especially in water resource protection, sanitation improvement, and the achievement of ecological livability goals. Traditional rural domestic sewage treatment often employs the activated sludge process, whose core aeration tank promotes microbial degradation of pollutants by injecting air into the sewage. However, this process faces significant challenges in practical operation.

[0003] During wastewater aeration, a large amount of viscous foam and organic scum continuously cover the wastewater surface, forming a physical barrier. This not only hinders the effective transfer of oxygen to the water and reduces the metabolic efficiency of microorganisms, but also leads to uneven distribution of dissolved oxygen concentration, severely affecting treatment efficiency. More importantly, in rural areas with fluctuating population density, the seasonal changes in wastewater composition are significant (such as a surge in detergent concentration during holidays), making foam accumulation a particularly prominent problem. Traditional manual removal methods are inefficient and costly to maintain.

[0004] Many defoaming devices in aeration tanks use fixed mechanical scraping structures, which have limited coverage and are difficult to dynamically respond to changes in the foam generation area. Rural wastewater treatment plants are often scattered and lack maintenance support. The equipment's insufficient adaptability to complex water quality fluctuations exacerbates the failure rate. Incomplete scum removal can lead to a chain of problems such as equipment blockage and scaling of aeration heads, ultimately causing system shutdown. This sharply contradicts the principles of "low cost, easy maintenance, and sustainability" in the construction and management of rural infrastructure.

[0005] Meanwhile, foam that is not removed in time carries a large amount of undegraded organic matter and pathogenic microorganisms, which may pollute the surrounding soil and crops after being spread by the wind, posing a threat to rural ecological security. If the nitrogen, phosphorus and other nutrients enriched in the foam are directly crushed and recycled, it will not only increase the treatment load, but also miss the window for resource recovery.

[0006] The aforementioned problems have become common issues hindering the stable operation and long-term service of rural sewage treatment facilities. As rural development shifts from engineering construction to refined management, it is necessary to develop an aeration system with intelligent defoaming, dynamic sludge removal, and self-cleaning capabilities to overcome the limitations of traditional processes and support the sustainable development of rural water environment governance. Summary of the Invention

[0007] The main objective of this invention is to provide a wastewater treatment system that effectively defoams and intercepts scum during the aeration process of wastewater. The defoaming and scum interception components in this system are easy to clean.

[0008] To achieve the above objectives, the technical solution provided by this invention is as follows: A wastewater treatment system includes an aeration tank. A sliding member, capable of sliding along the length of the aeration tank, is located at the upper end of the aeration tank. Multiple defoaming and sludge-blocking components are located at the lower end of the sliding member. Each defoaming and sludge-blocking component includes an upper conical block fixed to the lower end of the sliding member. The upper conical block has a larger upper end and a smaller lower end. An upper conical ring is rotatably mounted on the outer edge of the upper conical block. An upper drive assembly capable of driving the upper conical ring to rotate is located inside the upper conical block. Brush bristles are fixed to the outer edge of the upper conical ring. A lower conical block, concentrically located below the upper conical block, has a smaller upper end and a larger lower end. The upper end of the upper conical block and the lower end of the lower conical block are fixedly connected by multiple fixing rods. An inner hole is formed inside the lower conical block. A lower conical ring is rotatably mounted on the outer edge of the lower conical block. A lower drive assembly capable of driving the lower conical ring to rotate is located inside the lower conical block. A mixing and conveying assembly is located at the lower end of the upper conical block, extending through the upper conical block. The inner hole has a vortex spring plate on the outer side of the lower conical ring. The vortex spring plate includes a narrow section on the upper side and a wide section on the lower side. There is a gap between the narrow section of the vortex spring plate and the outer edge of the lower conical ring. The wide section of the vortex spring plate contacts the outer edge of the lower conical ring, forming a vortex storage tank between the wide section of the vortex spring plate and the outer edge of the lower conical ring. A baffle is fixed to the lower end of one of the fixed rods, which blocks the lower port of the vortex storage tank. A vertically arranged first slide rod is fixed to the lower end of the wide section of the vortex spring plate. The first slide rod is slidably connected to the upper conical block. A drive unit capable of driving the first slide rod to rise and fall is provided on the upper conical block. A vertical second slide rod is fixed to the upper end of the narrow section of the vortex spring plate. The second slide rod is slidably connected to the upper conical ring. Multiple through holes are opened on the wide section of the vortex spring plate. A filter screen is fixed in the through holes. After the first slide rod moves upward, the vortex spring plate deforms and can adhere to the outer side of the upper conical ring.

[0009] Specifically, the sliding component includes a horizontal plate, and electrically controlled slide rails are fixed on both sides of the upper end of the aeration tank. The sliding part of the electrically controlled slide rail is fixedly connected to the horizontal plate, and the defoaming and slag-blocking assembly is fixed at the lower end of the horizontal plate.

[0010] Specifically, the upper drive assembly includes a second toothed ring fixed inside the upper conical ring, the second toothed ring being rotatably disposed in an annular groove outside the upper conical block, a third motor being fixed inside the upper conical block, and a third gear being concentrically fixed on the output shaft of the third motor, the third gear meshing with the second toothed ring.

[0011] Specifically, the lower drive assembly includes a first toothed ring fixed inside the lower conical ring, the first toothed ring being rotatably disposed in an annular groove outside the lower conical block, a second motor being fixed inside the lower conical block, and a second gear being concentrically fixed on the output shaft of the second motor, the second gear meshing with the first toothed ring.

[0012] Specifically, the upper conical block, lower conical block, upper conical ring, and lower conical ring have the same taper.

[0013] Specifically, the drive unit includes a rack fixed on a first slide bar, the rack being vertically arranged, a first motor fixed inside an upper conical block, and a first gear concentrically fixed on the output shaft of the first motor, the first gear meshing with the first rack.

[0014] Specifically, the upper cone has a vertically arranged stepped hole, which is larger at the top and smaller at the bottom. A slider is slidably installed in the larger hole of the stepped hole, and the upper end of the second slider passes through the smaller hole of the stepped hole and is fixedly connected to the slider.

[0015] Specifically, an aeration pipe is fixed inside the lower end of the aeration tank.

[0016] Specifically, the stirring and conveying assembly includes a fourth motor concentrically fixed inside the lower end of the upper cone block, a stirring rod concentrically fixed on the output shaft of the fourth motor, the stirring rod passing through the inner hole, a spiral fan blade fixed on the stirring rod inside the inner hole, and multiple stirring blades fixed on the stirring rod on the lower side of the lower cone block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This system actively draws in air bubbles and scum from the surface of the wastewater through a stirring and conveying component and transports them to a vortex storage tank. Inside the vortex storage tank, the air bubbles break, and the liquid flows back to the aeration tank through a filter screen. This avoids foam covering the surface of the wastewater, ensures direct contact between air and wastewater, significantly reduces aeration obstruction, eliminates the need for external auxiliary equipment, and improves overall treatment efficiency.

[0018] 2. This system has a built-in self-cleaning function. When the lower cone ring rotates, the wide section of the vortex spring automatically scrapes off the scum adhering to the outer edge of the lower cone ring. After the Qidong drive unit, the vortex spring deforms and attaches to the cone ring, and cleans the residual scum by rotating the brush. The integrated design allows for quick cleaning of components during operation or shutdown, reducing the frequency of manual intervention and maintenance costs.

[0019] 3. The sliding component can move along the length of the aeration tank, driving the defoaming and scum-blocking components to fully cover the surface of the sewage, thus overcoming the limitations of fixed equipment and ensuring that foam and scum can be dealt with in a timely manner regardless of where they are distributed in the tank. It is also suitable for aeration tank operation scenarios of different sizes.

[0020] 4. All components are highly integrated on the upper part of the sliding part, with a compact structure and strong synergy, which simplifies the startup and operation process, improves system stability, and facilitates installation and daily management.

[0021] 5. This system separates and captures scum in the vortex storage tank, realizing centralized recovery of scum. This not only reduces the risk of foam corrosion to surrounding equipment, but also reduces the total amount of wastewater and subsequent treatment load through liquid reflux, promoting resource recycling and environmental protection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system.

[0023] Figure 2 This is a schematic diagram of the defoaming and slag-blocking component.

[0024] Figure 3 This is a schematic diagram showing the connection between the upper and lower cone blocks.

[0025] Figure 4 This is a cross-sectional view of the connection structure between the upper and lower conical blocks.

[0026] Figure 5 This is a schematic diagram of the through hole on the wide section of the vortex spring.

[0027] Figure 6 This is a schematic diagram of the drive unit.

[0028] Figure 7 This is a schematic diagram of the aeration pipes inside the aeration tank.

[0029] Figure 8 This is a schematic diagram showing the deformation of the vortex-shaped spring sheet and its attachment to the outside of the upper conical ring.

[0030] Figure 9 This is a schematic diagram of the upper driving component.

[0031] Figure 10 This is a schematic diagram of the baffle on the fixed rod.

[0032] Figure 11 This is a schematic diagram of the baffle blocking the lower port of the vortex storage tank.

[0033] The components in the attached diagram are named as follows: 1. Aeration tank; 2. Electrically controlled slide rail; 3. Horizontal plate; 4. Upper conical block; 5. Fixing rod; 51. Baffle; 6. Lower conical block; 7. Vortex spring; 71. Wide section; 72. Narrow section; 8. Through hole; 9. Filter screen; 10. First slide rod; 11. Second slide rod; 111. Sliding block; 112. Stepped hole; 12. Rack; 13. First gear; 14. First motor; 15. Lower conical ring; 16. First gear ring; 17. Second gear; 18. Second motor; 19. Upper conical ring; 20. Second gear ring; 21. Third gear; 22. Third motor; 23. Fourth motor; 24. Stirring rod; 25. Spiral fan blade; 26. Aeration pipe; 27. Inner hole; 28. Stirring blade. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figures 1-11As shown, a wastewater treatment system includes an aeration tank 1, with an aeration pipe 26 fixed inside the lower end of the aeration tank 1. A sliding member capable of sliding along the length of the aeration tank 1 is provided at the upper end of the aeration tank 1, and multiple defoaming and sludge-blocking components are provided at the lower end of the sliding member.

[0036] Furthermore, the sliding component includes a horizontal plate 3, and electrically controlled slide rails 2 are fixed on both sides of the upper end of the aeration tank 1. The sliding part of the electrically controlled slide rail 2 is fixedly connected to the horizontal plate 3, and the defoaming and slag-blocking assembly is fixed at the lower end of the horizontal plate 3.

[0037] The defoaming and slag-blocking assembly includes an upper conical block 4 fixed to the lower end of the sliding member. The upper conical block 4 is larger at the upper end and smaller at the lower end. An upper conical ring 19 is rotatably embedded in the outer edge of the upper conical block 4. An upper drive assembly capable of driving the upper conical ring 19 to rotate is provided inside the upper conical block 4. Brush bristles are fixed to the outer edge of the upper conical ring 19.

[0038] Furthermore, such as Figure 4 As shown, the upper drive assembly includes a second gear ring 20 fixed inside the upper conical ring 19. The second gear ring 20 is rotatably disposed in an annular groove outside the upper conical block 4. A third motor 22 is fixed inside the upper conical block 4. A third gear 21 is concentrically fixed on the output shaft of the third motor 22, and the third gear 21 meshes with the second gear ring 20. After the third motor 22 is started, the third motor 22 drives the third gear 21 to rotate, and the third gear 21 drives the upper conical ring 19 and the brush bristles to rotate through the second gear ring 20.

[0039] A lower cone block 6 is concentrically arranged below the upper cone block 4. The lower cone block 6 is smaller at the top and larger at the bottom. The upper end of the upper cone block 4 and the lower end of the lower cone block 6 are fixedly connected by multiple fixing rods 5. An inner hole 27 is opened in the lower cone block 6. A lower cone ring 15 is rotatably set in the outer edge of the lower cone block 6. A lower drive assembly capable of driving the lower cone ring 15 to rotate is arranged in the lower cone block 6.

[0040] Furthermore, such as Figure 4 As shown, the lower drive assembly includes a first gear ring 16 fixed inside the lower conical ring 15. The first gear ring 16 is rotatably disposed in an annular groove outside the lower conical block 6. A second motor 18 is fixed inside the lower conical block 6. A second gear 17 is concentrically fixed on the output shaft of the second motor 18, and the second gear 17 meshes with the first gear ring 16. After the second motor 18 is started, the second motor 18 drives the second gear 17 to rotate, and the second gear 17 drives the lower conical ring 15 to rotate through the first gear ring 16.

[0041] The upper conical block 4, the lower conical block 6, the upper conical ring 19, and the lower conical ring 15 have the same taper.

[0042] A stirring and conveying assembly is provided at the lower end of the upper conical block 4, and the stirring and conveying assembly passes through the inner hole 27.

[0043] Furthermore, such as Figure 4As shown, the mixing and conveying assembly includes a fourth motor 23 concentrically fixed inside the lower end of the upper conical block 4. A stirring rod 24 is concentrically fixed to the output shaft of the fourth motor 23, passing through an inner hole 27. A spiral fan blade 25 is fixed to the stirring rod 24 inside the inner hole 27, and multiple stirring blades 28 are fixed to the stirring rod 24 on the lower side of the lower conical block 6. After the fourth motor 23 starts, the stirring rod 24 drives the spiral fan blade 25 and stirring blades 28 to rotate. During the aeration of the wastewater in the aeration tank 1, the spiral fan blade 25, when rotating in the inner hole 27, can draw scum and air bubbles from the surface of the wastewater into the inner hole 27, and can also convey the air bubbles and scum entering the inner hole 27 upwards.

[0044] A vortex spring 7 is provided on the outer side of the lower conical ring 15. The vortex spring 7 includes a narrow section 72 on the upper side and a wide section 71 on the lower side. A gap is provided between the narrow section 72 of the vortex spring 7 and the outer edge of the lower conical ring 15, and the wide section 71 of the vortex spring 7 is in contact with the outer edge of the lower conical ring 15.

[0045] During the rotation of the lower conical ring 15, the wide section 71 of the vortex spring 7 can scrape off the scum adhering to the outer edge of the lower conical ring 15.

[0046] A vortex storage tank is formed between the wide section 71 of the vortex spring 7 and the outer edge of the lower conical ring 15. A baffle 51 is fixed to the lower end of one of the fixing rods 5, and the baffle 51 blocks the lower port of the vortex storage tank. Multiple through holes 8 are provided on the wide section 71 of the vortex spring 7, and a filter screen 9 is fixed in the through holes 8.

[0047] After being discharged from the upper end of the inner hole 27, the scum and bubbles enter the vortex storage tank through the gap between the narrow section 72 of the vortex spring 7 and the outer edge of the lower conical ring 15. During the flow within the vortex storage tank, the bubbles break down. Simultaneously, the liquid in the scum passes through the filter screen 9 and flows into the aeration tank 1 through the through-hole 8. The scum within the vortex storage tank can be blocked by the baffle 51.

[0048] The lower end of the wide section 71 of the vortex spring 7 is fixed with a vertically arranged first slide rod 10. The first slide rod 10 is slidably connected to the upper conical block 4. The upper conical block 4 is provided with a drive unit that can drive the first slide rod 10 to rise and fall.

[0049] Furthermore, such as Figure 6 As shown, the drive unit includes a rack 12 fixed on the first slide bar 10, the rack 12 being vertically arranged. A first motor 14 is fixed inside the upper conical block 4, and a first gear 13 is concentrically fixed on the output shaft of the first motor 14, the first gear 13 meshing with the first rack 12. After the first motor 14 is started, the first motor 14 drives the first gear 13 to rotate, and the first gear 13 drives the first slide bar 10 upward through the rack 12.

[0050] The upper end of the narrow section 72 of the vortex spring 7 is fixed with a vertical second slide rod 11, which is slidably connected to the upper conical ring.

[0051] Furthermore, such as Figure 4 As shown, a vertically arranged stepped hole 112 is provided in the upper truncated cone. The stepped hole 112 is larger at the top and smaller at the bottom. A slider 111 is slidably arranged in the larger hole of the stepped hole 112. The upper end of the second slider 11 passes through the smaller hole of the stepped hole 112 and is fixedly connected to the slider 111.

[0052] After the first slide bar 10 moves upward, the vortex spring 7 deforms and is able to attach to the outside of the upper cone ring 19.

[0053] like Figure 8 and Figure 9 As shown, during the upward movement of the first slide bar 10, the vortex spring 7 deforms. Simultaneously, the second slide bar 11 drives the slider 111 upward. When the upper end of the narrow section 72 of the vortex spring 7 contacts the outer edge of the upper conical block 4, the second slide bar 11 and the slider 111 stop moving upward. Then, as the first slide bar 10 continues to move upward, the vortex spring 7 gradually adheres to the outer side of the upper conical ring 19. After the vortex spring 7 adheres to the outer side of the upper conical ring 19, the third motor 22 is activated to make the upper conical ring 19 rotate. During the rotation of the upper conical ring 19, the bristles can brush away and clean the floating debris adhering to the vortex spring 7.

[0054] During operation, when aerating the wastewater in aeration tank 1, the fourth motor 23 is started. The fourth motor 23 drives the stirring rod 24, the spiral fan blade 25, and the stirring blade 28 to rotate. The stirring blade 28 can stir the wastewater in aeration tank 1. During the rotation of the spiral fan blade 25, it can suck the scum and air bubbles on the surface of the wastewater into the inner hole 27 and transport them upward.

[0055] After being discharged from the upper end of the inner hole 27, scum and bubbles enter the vortex storage tank through the gap between the narrow section 72 of the vortex spring 7 and the outer edge of the lower conical ring 15. During the flow of scum and bubbles in the vortex storage tank, the bubbles break up. At the same time, the liquid in the scum passes through the filter screen 9 and flows into the aeration tank 1 through the through hole 8. The scum in the vortex storage tank can be blocked by the baffle 51, thereby realizing the recovery of foam and scum generated on the surface of the sewage.

[0056] After reducing the number of bubbles and scum on the surface of the sewage in aeration tank 1, it avoids the situation where a large amount of foam and scum cover the surface of the sewage, preventing the atmosphere from directly contacting the sewage.

[0057] When the defoaming and slag-blocking assembly needs cleaning, the second motor 18 is started first. The second motor 18 drives the second gear 17 to rotate, and the second gear 17 drives the lower conical ring 15 to rotate through the first gear ring 16. During the rotation of the lower conical ring 15, the wide section 71 of the vortex spring 7 can scrape off the scum or impurities adhering to the outside of the lower conical ring 15. Then, the lower conical block 6 and the vortex spring 7 are rinsed, thereby removing the scum in the vortex storage tank. At this time, some scum or impurities are still adhering to the vortex spring 7.

[0058] Then, the first motor 14 is started, which drives the first gear 13 to rotate. The first gear 13, through the rack 12, causes the first slide bar 10 to move upward. During the upward movement of the first slide bar 10, the vortex spring 7 deforms. At the same time, the second slide bar 11 drives the slider 111 upward. When the upper end of the narrow section 72 of the vortex spring 7 contacts the outer edge of the upper conical block 4, the second slide bar 11 and the slider 111 stop moving upward. Then, as the first slide bar 10 continues to move upward, the vortex spring 7 gradually adheres to the outer side of the upper conical ring 19. The state in which the vortex spring 7 gradually adheres to the outer side of the upper conical ring 19 is as follows: Figure 8 As shown. After the vortex spring 7 is attached to the outside of the upper conical ring 19, the third motor 22 is started to make the upper conical ring 19 rotate. During the rotation of the upper conical ring 19, the bristles can brush away and clean the floating scum adhering to the vortex spring 7. Then the upper conical ring 19 and the vortex spring 7 are rinsed.

[0059] Finally, after the first slide bar 10 is lowered and reset, and the vortex spring 7 is reset, the defoaming and slag-blocking assembly is rinsed as a whole.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater treatment system, comprising an aeration tank (1), wherein a sliding member capable of sliding along the length direction of the aeration tank (1) is provided at the upper end of the aeration tank (1), characterized in that, Multiple defoaming and slag-blocking components are provided at the lower end of the sliding component; the defoaming and slag-blocking components include an upper conical block (4) fixed at the lower end of the sliding component, the upper conical block (4) is larger at the upper end and smaller at the lower end, an upper conical ring (19) is rotatably embedded in the outer edge of the upper conical block (4), an upper driving component capable of driving the upper conical ring (19) to rotate is provided inside the upper conical block (4), bristles are fixed on the outer edge of the upper conical ring (19), and a lower conical block (6) is concentrically arranged below the upper conical block (4), the lower conical block (6) is smaller at the upper end and larger at the lower end, the upper end of the upper conical block (4) and the lower conical block (6) are concentrically arranged below the upper conical block (4). The lower end of block (6) is fixedly connected by multiple fixing rods (5). An inner hole (27) is opened in the lower conical block (6). A lower conical ring (15) is rotatably set on the outer edge of the lower conical block (6). A lower drive assembly capable of driving the lower conical ring (15) to rotate is set in the lower conical block (6). A stirring and conveying assembly is set at the lower end of the upper conical block (4). The stirring and conveying assembly passes through the inner hole (27). A vortex spring (7) is set on the outer side of the lower conical ring (15). The vortex spring (7) includes a narrow section (72) on the upper side and a wide section (71) on the lower side. A gap is provided between the narrow section (72) of the vortex spring (7) and the outer edge of the lower conical ring (15), and the wide section (71) of the vortex spring (7) contacts the outer edge of the lower conical ring (15). A vortex storage groove is formed between the wide section (71) of the vortex spring (7) and the outer edge of the lower conical ring (15). A baffle (51) is fixed to the lower end of one of the fixed rods (5), and the baffle (51) blocks the lower port of the vortex storage groove. A vertically arranged first slide rod (10) is fixed to the lower end of the wide section (71) of the vortex spring (7). 10) is slidably connected to the upper conical block (4). The upper conical block (4) is provided with a drive unit that can drive the first slide rod (10) to rise and fall. The upper end of the narrow section (72) of the vortex spring (7) is fixed with a vertical second slide rod (11). The second slide rod (11) is slidably connected to the upper conical ring. The wide section (71) of the vortex spring (7) is provided with multiple through holes (8). A filter screen (9) is fixed in the through hole (8). After the first slide rod (10) moves upward, the vortex spring (7) deforms and can attach to the outside of the upper conical ring (19).

2. The wastewater treatment system according to claim 1, characterized in that, The sliding component includes a horizontal plate (3), and an electrically controlled slide rail (2) is fixed on both sides of the upper end of the aeration tank (1). The sliding part of the electrically controlled slide rail (2) is fixedly connected to the horizontal plate (3), and the defoaming and slag-blocking assembly is fixed at the lower end of the horizontal plate (3).

3. The wastewater treatment system according to claim 1, characterized in that, The upper drive assembly includes a second toothed ring (20) fixed inside the upper conical ring (19). The second toothed ring (20) is rotatably disposed in the annular groove outside the upper conical block (4). A third motor (22) is fixed inside the upper conical block (4). A third gear (21) is concentrically fixed on the output shaft of the third motor (22). The third gear (21) meshes with the second toothed ring (20).

4. The wastewater treatment system according to claim 1, characterized in that, The lower drive assembly includes a first gear ring (16) fixed inside the lower conical ring (15), the first gear ring (16) is rotatably disposed in the annular groove outside the lower conical block (6), a second motor (18) is fixed inside the lower conical block (6), a second gear (17) is concentrically fixed on the output shaft of the second motor (18), and the second gear (17) meshes with the first gear ring (16).

5. The wastewater treatment system according to claim 1, characterized in that, The taper of the upper conical block (4), the lower conical block (6), the upper conical ring (19), and the lower conical ring (15) is equal.

6. The wastewater treatment system according to claim 1, characterized in that, The drive unit includes a rack (12) fixed on the first slide bar (10), the rack (12) is vertically arranged, a first motor (14) is fixed inside the upper conical block (4), a first gear (13) is concentrically fixed on the output shaft of the first motor (14), and the first gear (13) meshes with the first rack (12).

7. The wastewater treatment system according to claim 1, characterized in that, The upper cone has a vertically arranged stepped hole (112) inside. The stepped hole (112) is larger at the top and smaller at the bottom. A slider (111) is slidably arranged in the larger hole of the stepped hole (112). The upper end of the second slider (11) passes through the smaller hole of the stepped hole (112) and is fixedly connected to the slider (111).

8. The wastewater treatment system according to claim 1, characterized in that, An aeration pipe (26) is fixed inside the lower end of the aeration tank (1).

9. The wastewater treatment system according to claim 1, characterized in that, The stirring and conveying assembly includes a fourth motor (23) concentrically fixed inside the lower end of the upper conical block (4), a stirring rod (24) concentrically fixed on the output shaft of the fourth motor (23), the stirring rod (24) passing through the inner hole (27), a spiral fan blade (25) fixed on the stirring rod (24) inside the inner hole (27), and multiple stirring blades (28) fixed on the stirring rod (24) on the lower side of the lower conical block (6).

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