Multi-stage wastewater treatment device

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a multi-stage wastewater treatment device which comprises a shell, a dosing barrel and an aeration tank, one side of the shell is fixedly connected with a motor I, the output end of the motor I is fixedly connected with a conical barrel, the interior of the shell is fixedly connected with a wastewater pipe, the interior of the shell is fixedly connected with a partition plate, and the partition plate is fixedly connected with the dosing barrel. A grating is fixedly connected to the interior of the shell, auger blades are fixedly connected to the outer wall of the conical barrel, an open hole is formed in the conical barrel, and a sludge pipe is fixedly connected to the interior of the shell. According to the utility model, through the cooperation of the shell, the dosing barrel, the stirring blade, the auger blade, the conical barrel, the aeration tank and the air pipe, the problems that the screening mode of a filter screen is relatively single, only a solid-liquid mixture is filtered, and further complete solid-liquid separation work cannot be efficiently performed on sewage and sludge are solved; therefore, the working efficiency of wastewater treatment operation is greatly reduced, and the treatment efficiency of the multi-stage wastewater treatment device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a multi-stage wastewater treatment device. Background Art

[0002] Wastewater refers to water used in production, life and other activities, and contains various pollutants and waste materials. These pollutants and waste materials can come from industrial emissions, agricultural activities, urban drainage systems, domestic sewage, rainwater runoff and other sources. Untreated wastewater contains various pollutants and harmful substances. If it is directly discharged into natural water bodies, it will pollute water sources, destroy ecosystems, and affect the ecological balance of the surrounding environment. By treating wastewater, the adverse effects on water bodies and ecological environments can be reduced, and the health of the natural environment can be protected. In order to improve the efficiency of wastewater treatment, by using a multi-stage wastewater treatment device, each treatment unit can focus on removing specific types of pollutants, so that the wastewater can reach higher water quality standards after multi-stage treatment.

[0003] The traditional multi-stage wastewater treatment device is equipped with a treatment box, a filter screen, a compression spring, a vibration motor, a filter box and a mounting pipe. When in use, the wastewater is poured into the treatment box, and the filter screen can filter the garbage and sludge in the wastewater. Since the filter screen is arranged in an inclined state inside the treatment box and a vibration motor is arranged on the surface of the treatment box, the vibration generated by the vibration motor can make the compression spring drive the filter screen to move up and down, so that the garbage on the filter screen can be discharged to the outside of the treatment box, and the sewage and sludge are separated in this way.

[0004] However, the structure of the traditional multi-stage wastewater treatment device is complex, and only a single filter is used to separate the solid and liquid from the sludge and sewage. However, the screening method of the filter is relatively simple, and only one side of the solid-liquid mixture is filtered, and the sewage and sludge cannot be efficiently separated completely into solid and liquid. As a result, when entering the next step, it is necessary to return to the first step for repeated operations, which takes too long to treat the sewage, and even affects the amount of sewage treatment work, resulting in a significant reduction in the efficiency of the wastewater treatment operation. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a multi-stage wastewater treatment device, which aims to improve the problem that the screening method of the filter net is relatively single and only filters one side of the solid-liquid mixture, and thus cannot efficiently separate the sewage and sludge into solid and liquid, resulting in a significant reduction in the working efficiency of the wastewater treatment operation.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-stage wastewater treatment device, comprising a shell, a dosing barrel and an aeration tank, a motor 1 is fixedly connected to one side of the shell, a conical barrel is fixedly connected to the output end of the motor 1, a wastewater pipe is fixedly connected to the inside of the shell, a partition is fixedly connected to the inside of the shell, a grille is fixedly connected to the inside of the shell, an auger blade is fixedly connected to the outer wall of the conical barrel, an opening is opened inside the conical barrel, a sludge pipe is fixedly connected to the inside of the shell, a motor 2 is fixedly connected to the top of the dosing barrel, a transmission gear is fixedly connected to the output end of the motor 2, a sleeve 1 is rotatably connected to the inside of the dosing barrel, a driven gear is fixedly connected to the outer wall of the sleeve 1, the driven gear is meshed with the outer wall of the transmission gear, a stirring blade is arranged on the outer wall of the sleeve 1, a blower is fixedly connected to one side of the aeration tank, an air pipe 1 is fixedly connected to the output end of the blower, an air pipe 2 is arranged on one side of the air pipe 1, a limit position component is arranged inside the aeration tank, and a dosing pipe is fixedly connected to the inside of the dosing barrel.

[0007] As a further description of the above technical solution:

[0008] The limiting assembly comprises a limiting seat, the bottom of which is fixedly connected to the inside of the aeration tank, and the second outer wall of the air pipe is rotatably connected to the inside of the limiting seat.

[0009] As a further description of the above technical solution:

[0010] A connecting pipe 1 is fixedly connected to the inside of the shell, a water pump 1 is arranged at one end of the connecting pipe 1, an input end of the water pump 1 is fixedly connected to one end of the connecting pipe 1, an output end of the water pump 1 is fixedly connected to the inside of the dosing barrel, a connecting pipe 2 is fixedly connected to the outer wall of the dosing barrel, a water pump 2 is arranged at one end of the connecting pipe 2, an input end of the water pump 2 is fixedly connected to one end of the connecting pipe 2, and an output end of the water pump 2 is fixedly connected to the inside of the aeration tank.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the sleeve 1 is fixedly connected to the sleeve 2, the interior of the sleeve 2 is rotatably connected to a limiting column, one end of the limiting column is fixedly connected to one side of the stirring blade, and the other end of the limiting column is fixedly connected to the bevel gear 1.

[0013] As a further description of the above technical solution:

[0014] The top of the sleeve one is fixedly connected to the motor three, the output end of the motor three is fixedly connected to the rotating shaft, the outer wall of the rotating shaft is fixedly connected to the bevel gear two, and the bevel gear two is meshed with the outer wall of the bevel gear one.

[0015] As a further description of the above technical solution:

[0016] A groove is provided inside the aeration tank, and a drainage pipe is fixedly connected inside the aeration tank.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the air pipe one is fixedly connected to a limiting ring, a rotating roller is rotatably connected inside the limiting ring, a limiting groove is arranged inside the air pipe two, the air pipe two is rotatably connected to the outer wall of the limiting ring through the limiting groove, and the outer wall of the rotating roller fits inside the limiting groove.

[0019] As a further description of the above technical solution:

[0020] The outer wall of the first trachea is fixedly connected with a sealing ring, and the outer wall of the sealing ring is fitted inside the second trachea.

[0021] As a further description of the above technical solution:

[0022] A through hole is provided inside the second air pipe, and a guide plate is fixedly connected to the outer wall of the second air pipe.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the utility model, firstly, the multi-stage treatment effect is achieved through the cooperation between the shell, the dosing barrel, the stirring blade, the auger blade, the conical barrel, the aeration tank and the air pipe, which solves the problem that the screening method of the traditional filter is relatively single and only filters one side of the solid-liquid mixture, and then cannot efficiently separate the sewage and the sludge completely, resulting in a significant reduction in the working efficiency of the wastewater treatment operation. It not only improves the treatment efficiency of the multi-stage wastewater treatment device, but also correspondingly improves the continuity of the wastewater treatment.

[0025] 2. In the utility model, the effect of adjusting the angle of the stirring blade is achieved through the cooperation between the stirring blade, bevel gear 1, bevel gear 2, rotating shaft, sleeve 1 and sleeve 2, which solves the problem that the angle of the stirring blade cannot be adjusted when adding medicine in the traditional wastewater treatment device, resulting in the need to extend the stirring time with the wastewater when stirring the liquid medicine, thereby improving the dosing and stirring efficiency of the multi-stage wastewater treatment device.

[0026] 3. In the utility model, the coordination among the limit seat, the air pipe 2, the limit ring, the rotating roller, the sealing ring and the guide plate achieves the effect of driving the air pipe to rotate during aeration, thereby solving the problem that the contact and mixing efficiency of wastewater and air is low in the traditional multi-stage wastewater treatment device when aeration occurs, and improving the mixing efficiency of wastewater and air in the multi-stage wastewater treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of a multi-stage wastewater treatment device proposed by the utility model;

[0028] Figure 2 A schematic diagram of the grid structure of a multi-stage wastewater treatment device proposed by the utility model;

[0029] Figure 3 This is a schematic diagram of the internal structure of a conical barrel of a multi-stage wastewater treatment device proposed by the utility model;

[0030] Figure 4 This is a schematic diagram of the internal structure of a dosing barrel of a multi-stage wastewater treatment device proposed by the utility model;

[0031] Figure 5 This is a schematic diagram of the limit column structure of a multi-stage wastewater treatment device proposed by the utility model;

[0032] Figure 6 A schematic diagram of the internal structure of an aeration tank of a multi-stage wastewater treatment device proposed by the utility model;

[0033] Figure 7 This is a schematic diagram of the rotating roller structure of a multi-stage wastewater treatment device proposed by the utility model.

[0034] Legend:

[0035] 1. Shell; 2. Dosing barrel; 3. Aeration tank; 4. Wastewater pipe; 5. Motor 1; 6. Grille; 7. Conical barrel; 8. Auger blade; 9. Opening; 10. Baffle; 11. Sludge pipe; 12. Connecting pipe 1; 13. Water pump 1; 14. Motor 2; 15. Transmission gear; 16. Sleeve 1; 17. Sleeve 2; 18. Stirring blade; 19. Connecting pipe 2; 20. Water pump 2; 2 1. Driven gear; 22. Motor three; 23. Limiting column; 24. Bevel gear one; 25. Rotating shaft; 26. Bevel gear two; 27. Blower; 28. Air pipe one; 29. ​​Limiting seat; 30. Slot; 31. Drain pipe; 32. Limiting ring; 33. Rotating roller; 34. Sealing ring; 35. Air pipe two; 36. Limiting groove; 37. Through hole; 38. Guide plate; 39. Dosing pipe. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Reference Figure 1-3, an embodiment provided by the utility model: a multi-stage wastewater treatment device, including a shell 1, a dosing barrel 2 and an aeration tank 3, a motor 5 is fixedly connected to one side of the shell 1, a conical barrel 7 is fixedly connected to the output end of the motor 5, a wastewater pipe 4 is fixedly connected to the inside of the shell 1, a partition 10 is fixedly connected to the inside of the shell 1, a grille 6 is fixedly connected to the inside of the shell 1, an auger blade 8 is fixedly connected to the outer wall of the conical barrel 7, an opening 9 is provided inside the conical barrel 7, a sludge pipe 11 is fixedly connected to the inside of the shell 1, a motor 2 14 is fixedly connected to the top of the dosing barrel 2, a transmission gear 15 is fixedly connected to the output end of the motor 2 14, a sleeve 16 is rotatably connected to the inside of the dosing barrel 2, a driven gear 21 is fixedly connected to the outer wall of the sleeve 16, the driven gear 21 is meshed with the outer wall of the transmission gear 15, a stirring blade 18 is arranged on the outer wall of the sleeve 16, and a wastewater pipe 4 is fixedly connected to the inside of the shell 1, a partition 10 is fixedly connected to the inside of the shell 1, a grille 6 is fixedly connected to the inside of the shell 1, an auger blade 8 is fixedly connected to the outer wall of the conical barrel 7, an opening 9 is provided inside the conical barrel 7, a sludge pipe 11 is fixedly connected to the inside of the shell 1, a motor 2 14 is fixedly connected to the top of the dosing barrel 2, a transmission gear 15 is fixedly connected to the output end of the motor 2 14, a sleeve 16 is rotatably connected to the inside of the dosing barrel 2, a driven gear 21 A blower 27 is connected, an air pipe 28 is fixedly connected to the output end of the blower 27, an air pipe 2 35 is arranged on one side of the air pipe 28, a limiting assembly is arranged inside the aeration tank 3, a dosing pipe 39 is fixedly connected inside the dosing barrel 2, the limiting assembly includes a limiting seat 29, the bottom of the limiting seat 29 is fixedly connected to the inside of the aeration tank 3, the outer wall of the air pipe 2 35 is rotatably connected to the inside of the limiting seat 29, a connecting pipe 12 is fixedly connected to the inside of the shell 1, a water pump 13 is arranged at one end of the connecting pipe 12, an input end of the water pump 13 is fixedly connected to one end of the connecting pipe 12, an output end of the water pump 13 is fixedly connected to the inside of the dosing barrel 2, a connecting pipe 2 19 is fixedly connected to the outer wall of the dosing barrel 2, a water pump 20 is arranged at one end of the connecting pipe 2 19, an input end of the water pump 20 is fixedly connected to one end of the connecting pipe 2 19, and an output end of the water pump 20 is fixedly connected to the inside of the aeration tank 3;

[0038] Specifically, first, wastewater enters the interior of the housing 1 through the wastewater pipe 4. Next, the output end of the motor 5 drives the auger blade 8 to rotate. The main purpose of this step is to introduce sewage into the interior of the conical barrel 7. When the sewage extends into the conical barrel 7 through the wastewater pipe 4, the sewage is thrown out from the opening 9 due to the centrifugal force generated by the rotation of the auger blade 8. In this process, due to the heavy mass of the sludge in the sewage, the sludge will be guided by the auger blade 8 and discharged to the right side of the partition 10. The relatively clear sewage will pass through the grille 6 and remain on the left side of the partition 10. In this way, the sludge and sewage are initially separated. Subsequently, the sludge is discharged from the system through the sludge pipe 11 for further treatment or disposal. The sewage left on the left side of the partition 10 needs further purification. At this time, the input end of the water pump 13 starts to work, and the sewage inside the housing 1 is pumped into the connecting pipe 12. Then, through the output end of the water pump 13, the sewage is sent to the inside of the dosing barrel 2. Inside the dosing barrel 2, sodium hypochlorite is added through the dosing pipe 39. Sodium hypochlorite is a commonly used disinfectant that can effectively remove malodorous substances in sewage. When the liquid medicine is fully mixed with the sewage, the chemical reaction between them can effectively purify the sewage. In order to ensure that the liquid medicine and the sewage can be fully mixed, the output end of the motor 2 14 starts to work, driving the transmission gear 15 to rotate. The transmission gear 15 then drives the stirring blade 18 on the sleeve 16 to rotate through the driven gear 21. In this way, the stirring blade 18 can mix the sewage and the liquid medicine to ensure that they can fully contact and react. The treated sewage is then pumped into the interior of the connecting pipe 2 19 through the input end of the water pump 2 20. Then, through the output end of the water pump 2 20, the sewage is pumped into the aeration tank 3. In the aeration tank 3, the sewage will further contact with the air to promote the activity of microorganisms therein, thereby further purifying the water quality. At the same time, the input end of the blower 27 starts to work and inhales external air. Subsequently, through the output end of the blower 27, the air is blown into the air pipe 1 28 and finally blown out through the air pipe 2 35 to provide the required oxygen for the aeration tank 3.

[0039] Reference Figure 4-Figure 5 The outer wall of sleeve 16 is fixedly connected with sleeve 2 17, the inner part of sleeve 2 17 is rotatably connected with a limit column 23, one end of the limit column 23 is fixedly connected to one side of the stirring blade 18, and the other end of the limit column 23 is fixedly connected with a bevel gear 1 24, the top of sleeve 16 is fixedly connected with motor 3 22, the output end of motor 3 22 is fixedly connected with a rotating shaft 25, the outer wall of the rotating shaft 25 is fixedly connected with a bevel gear 2 26, and the bevel gear 26 is meshed with the outer wall of the bevel gear 1 24;

[0040] Specifically, when it is necessary to improve the mixing efficiency of the liquid medicine and the sewage, the output end of the motor three 22 will drive the rotating shaft 25 to start rotating. This rotation process is achieved through precise mechanical transmission, ensuring the stability and accuracy of power transmission. The rotation of the rotating shaft 25 is not isolated, it is connected to the bevel gear one 24 through the bevel gear two 26. The mutual engagement of the bevel gear two 26 and the bevel gear one 24 enables the rotational power of the rotating shaft 25 to be transmitted to the bevel gear one 24, so that it starts to rotate. The rotation of the bevel gear one 24 is not only a simple transmission process, but also an important link in the entire sewage treatment system. It is directly related to the adjustment of the inclination angle of the stirring blade 18. As the bevel gear one 24 rotates, the inclination angle of the stirring blade 18 will change, and this change is precisely adjusted according to the actual needs of sewage treatment. The increase in the inclination angle of the stirring blade 18 not only changes its contact area with the sewage, but more importantly, improves the stirring efficiency. A larger contact area means that more sewage can be touched by the stirring blade 18, thereby achieving faster and more uniform mixing.

[0041] Reference Figure 6 and Figure 7 A groove 30 is provided inside the aeration tank 3, a drain pipe 31 is fixedly connected inside the aeration tank 3, a limit ring 32 is fixedly connected to the outer wall of the air pipe 1 28, a rotating roller 33 is rotatably connected inside the limit ring 32, a limit groove 36 is provided inside the air pipe 2 35, the air pipe 2 35 is rotatably connected to the outer wall of the limit ring 32 through the limit groove 36, the outer wall of the rotating roller 33 is fitted inside the limit groove 36, a sealing ring 34 is fixedly connected to the outer wall of the air pipe 1 28, the outer wall of the sealing ring 34 is fitted inside the air pipe 2 35, a through hole 37 is provided inside the air pipe 2 35, and a guide plate 38 is fixedly connected to the outer wall of the air pipe 2 35;

[0042] Specifically, in order to improve the aeration efficiency, the air is discharged through the through hole 37, and the through hole 37 is at an angle of 45° with the horizontal plane. Such a design not only ensures that the air can overflow smoothly, but also through the clever diversion of the guide plate 38, the air pipe 2 35 rotates while the air overflows. This rotation action makes the aeration process more uniform, thereby greatly improving the aeration efficiency. In order to ensure the stable rotation and precise positioning of the air pipe 2 35, the limit ring 32 is tightly sleeved on the air pipe 2 35, and the limit groove 36 is fixed on the air pipe 1 28. When the air pipe 2 35 rotates under the action of the air, the limit ring 32 will be limited inside the limit groove 36, thereby ensuring the stability and accuracy of the air pipe 2 35. In addition, in order to prevent the exhaust gas from leaking, we installed a sealing ring 34 between the air pipe 1 28 and the air pipe 2 35. This sealing ring 34 is made of high-quality materials, has good elasticity and sealing performance, ensures that the connection between the two air pipes is tight and seamless, and effectively prevents gas leakage.

[0043] Working principle: When the multi-stage wastewater treatment device is used, the wastewater first enters the shell 1 through the wastewater pipe 4, and then the output end of the motor 5 drives the auger blade 8 to rotate, so that the sewage extends into the conical barrel 7 through the wastewater pipe 4, and the sewage is thrown out from the opening 9 by centrifugal force. Since the sludge in the sewage is heavy, it will be discharged to the right side of the partition 10 through the guidance of the auger blade 8, while the sewage passes through the grille 6 so that the sewage remains on the left side of the partition 10. The sludge is discharged through the sludge pipe 11, and the sewage draws the sewage inside the shell 1 into the connecting pipe 12 through the input end of the water pump 13, and then enters the dosing barrel 2 through the output end of the water pump 13, and then sodium hypochlorite is added into the dosing barrel 2 through the dosing pipe 39 to remove the odorous substances in the sewage. When the liquid medicine and the sewage are fully mixed, the output end of the motor 14 drives the transmission gear 15 to rotate, and the transmission gear 15 drives the stirring blade 18 on the sleeve 16 to rotate through the driven gear 21 to mix the sewage and the liquid medicine. It is necessary to increase the mixing When the efficiency is improved, the output end of the motor 3 22 drives the shaft 25 to rotate, and the shaft 25 drives the bevel gear 1 24 to rotate through the bevel gear 2 26, so that the bevel gear 1 24 drives the stirring blade 18 to adjust the inclination angle to increase the contact surface between the stirring blade 18 and the sewage to improve the stirring efficiency. Subsequently, the treated sewage is pumped into the connecting pipe 2 19 through the input end of the water pump 2 20, and is pumped into the aeration tank 3 through the output end of the water pump 2 20. The input end of the blower 27 sucks the external air The air enters, and then the air is blown into the inside of the second air pipe 35 through the air pipe 1 28 through the output end of the blower 27, and then the air is discharged through the through hole 37. The blower 27 is at an angle of 45° with the horizontal plane inside the second air pipe 35. Therefore, while the air overflows, the air pipe 2 35 is driven to rotate through the guide plate 38 to make the aeration more uniform. The second air pipe 35 is limited in the limiting groove 36 by the limiting ring 32, and the air pipe 1 28 and the second air pipe 35 are sealed by the sealing ring 34.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage wastewater treatment device, comprising a housing (1), a dosing tank (2) and an aeration tank (3), characterized in that: A motor 1 (5) is fixedly connected to one side of the shell (1), a conical barrel (7) is fixedly connected to the output end of the motor 1 (5), a wastewater pipe (4) is fixedly connected to the inside of the shell (1), a partition (10) is fixedly connected to the inside of the shell (1), a grille (6) is fixedly connected to the inside of the shell (1), an auger blade (8) is fixedly connected to the outer wall of the conical barrel (7), an opening (9) is provided inside the conical barrel (7), a sludge pipe (11) is fixedly connected to the inside of the shell (1), a motor 2 (14) is fixedly connected to the top of the dosing barrel (2), and a transmission gear is fixedly connected to the output end of the motor 2 (14). The medicine-adding barrel (2) is rotatably connected to a sleeve 1 (16), the outer wall of the sleeve 1 (16) is fixedly connected to a driven gear (21), the driven gear (21) is meshed with the outer wall of the transmission gear (15), the outer wall of the sleeve 1 (16) is provided with a stirring blade (18), one side of the aeration tank (3) is fixedly connected to a blower (27), the output end of the blower (27) is fixedly connected to an air pipe 1 (28), one side of the air pipe 1 (28) is provided with an air pipe 2 (35), a limit position component is provided inside the aeration tank (3), and a medicine-adding pipe (39) is fixedly connected inside the medicine-adding barrel (2).

2. A multi-stage wastewater treatment device according to claim 1, characterized in that: The limiting assembly comprises a limiting seat (29), the bottom of the limiting seat (29) is fixedly connected to the inside of the aeration tank (3), and the outer wall of the second air pipe (35) is rotatably connected to the inside of the limiting seat (29).

3. A multi-stage wastewater treatment device according to claim 1, characterized in that: A connecting pipe 1 (12) is fixedly connected to the inside of the shell (1), and a water pump 1 (13) is arranged at one end of the connecting pipe 1 (12). The input end of the water pump 1 (13) is fixedly connected to one end of the connecting pipe 1 (12), and the output end of the water pump 1 (13) is fixedly connected to the inside of the dosing barrel (2). A connecting pipe 2 (19) is fixedly connected to the outer wall of the dosing barrel (2), and a water pump 2 (20) is arranged at one end of the connecting pipe 2 (19). The input end of the water pump 2 (20) is fixedly connected to one end of the connecting pipe 2 (19), and the output end of the water pump 2 (20) is fixedly connected to the inside of the aeration tank (3).

4. A multi-stage wastewater treatment device according to claim 1, characterized in that: The outer wall of the sleeve 1 (16) is fixedly connected to the sleeve 2 (17), and the sleeve 2 (17) is rotatably connected to a limit column (23) inside. One end of the limit column (23) is fixedly connected to one side of the stirring blade (18), and the other end of the limit column (23) is fixedly connected to the bevel gear 1 (24).

5. A multi-stage wastewater treatment device according to claim 1, characterized in that: The top of the sleeve one (16) is fixedly connected to a motor three (22), the output end of the motor three (22) is fixedly connected to a rotating shaft (25), the outer wall of the rotating shaft (25) is fixedly connected to a bevel gear two (26), and the bevel gear two (26) is meshed with the outer wall of the bevel gear one (24).

6. A multi-stage wastewater treatment device according to claim 1, characterized in that: A slot (30) is provided inside the aeration tank (3), and a drainage pipe (31) is fixedly connected inside the aeration tank (3).

7. A multi-stage wastewater treatment device according to claim 1, characterized in that: The outer wall of the air pipe one (28) is fixedly connected to a limit ring (32), and a rotating roller (33) is rotatably connected inside the limit ring (32). A limit groove (36) is provided inside the air pipe two (35), and the air pipe two (35) is rotatably connected to the outer wall of the limit ring (32) through the limit groove (36), and the outer wall of the rotating roller (33) fits inside the limit groove (36).

8. A multi-stage wastewater treatment device according to claim 1, characterized in that: The outer wall of the first air pipe (28) is fixedly connected with a sealing ring (34), and the outer wall of the sealing ring (34) is fitted inside the second air pipe (35).

9. A multi-stage wastewater treatment device according to claim 1, characterized in that: A through hole (37) is provided inside the second air pipe (35), and a guide plate (38) is fixedly connected to the outer wall of the second air pipe (35).

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