A treatment device for efficiently removing nitrogen and phosphorus in domestic sewage

Abstract

The utility model relates to the field of domestic sewage treatment discloses a kind of processing device for efficiently removing nitrogen and phosphorus in domestic sewage, including shell one, the shell one top rotary connection has rotary drum one, the rotary drum one inner wall slidingly connected has cross bar one, the cross bar one bottom fixedly connected has fixed column, the fixed column outer wall fixedly connected has square shell two, the square shell two inner wall rotary connection has rotating rod, rotating rod outer wall fixedly connected has rotating support, square shell two inner wall is elastically connected with rotating support outer wall by torsion spring. In the utility model, rotary drum two of fixed column outer wall drives stirring rod synchronous motion, the water flow disturbance produced by its rotation and elastic swing, and the aeration of air outlet pipe form synergistic effect, at the same time, the scum generated on the surface of sewage will be dispersed and discharged in time due to the continuous movement of rotating support, so as to avoid the local anaerobic environment caused by scum covering, ensure the activity of aerobic microorganism stable.

Description

Technical Field

[0001] This utility model relates to the field of domestic sewage treatment, and in particular to a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage. Background Technology

[0002] Domestic sewage refers to wastewater generated by humans in their daily lives. It mainly comes from homes, schools, hospitals, commercial establishments, and public facilities. Its composition is mainly organic matter, but it also contains a variety of inorganic substances and microorganisms. Domestic sewage treatment refers to the process of removing or transforming pollutants in domestic sewage through physical, chemical, and biological methods, so that the treated water quality meets the discharge standards, thereby reducing environmental pollution and realizing the recycling or safe discharge of water resources.

[0003] Domestic sewage refers to wastewater generated by humans in their daily lives. It mainly comes from homes, schools, hospitals, commercial establishments, and public facilities. Its composition is mainly organic matter, but it also contains a variety of inorganic substances and microorganisms. Domestic sewage treatment refers to the process of removing or transforming pollutants in domestic sewage through physical, chemical, and biological methods, so that the treated water quality meets the discharge standards, thereby reducing environmental pollution and realizing the recycling or safe discharge of water resources.

[0004] The key to treating nitrogen and phosphorus in wastewater through aeration is to achieve oxygen dissolution through contact between air bubbles and wastewater. However, the dense layer of foam formed on the water surface hinders the upward path of air bubbles. Large air bubbles, due to buoyancy, rapidly impact the foam layer and break and dissipate before fully dissolving. Small air bubbles are easily adsorbed by the foam, agglomerate into air masses, and float upward as a whole, significantly reducing the contact area with wastewater. This necessitates continuous high-intensity operation of the aerator to maintain basic dissolved oxygen requirements. Therefore, a highly efficient treatment device for removing nitrogen and phosphorus from domestic wastewater is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, aiming to solve the problem of "excessive foaming during nitrogen and phosphorus aeration treatment of domestic sewage" in the prior art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, comprising an outer shell, an inner shell fixedly connected to the bottom of the inner wall of the outer shell, an outer shell two fixedly connected to the bottom of the outer shell, a rotating cylinder one rotatably connected to the top of the outer shell, a cross rod one slidably connected to the inner wall of the rotating cylinder one, a fixed column fixedly connected to the bottom of the cross rod one, a square shell two fixedly connected to the outer wall of the fixed column, a rotating rod rotatably connected to the inner wall of the square shell two, a rotating bracket fixedly connected to the outer wall of the rotating rod, the inner wall of the square shell two elastically connected to the outer wall of the rotating bracket via a torsion spring, a baffle one fixedly connected to the side of the rotating bracket, a guide groove opened at the top of the rotating bracket, a baffle two slidably connected to the inner wall of the rotating bracket, and a spherical body fixedly connected to the top of the baffle one.

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

[0008] A square shell is fixedly connected to the top of the outer shell. An electric actuator is fixedly connected to the top of the square shell. The bottom end of the inner rod of the electric actuator is rotatably connected to the top of the cross rod via a bearing. A motor is fixedly connected to the top of the outer shell. A rotating shaft is fixedly connected to the output shaft of the motor. A helical gear is fixedly connected to the outer wall of the rotating shaft. A helical gear is meshed with the outer wall of the helical gear. The inner wall of the helical gear is fixedly connected to the outer wall of the rotating cylinder. A mud pipe is fixedly connected to the outer wall of the outer shell. A submersible mud pump is fixedly connected to the bottom end of the mud pipe. A water inlet pipe is fixedly connected to the outer wall of the outer shell. A water outlet pipe is fixedly connected to the outer wall of the outer shell. The outer wall of the water inlet pipe is fixedly connected to the inner wall of the inner shell. The outer wall of the mud pipe is fixedly connected to the inner wall of the inner shell. A drain pipe is fixedly connected to the outer wall of the outer shell. A ring column is fixedly connected to the top end of the inner wall of the outer shell. A ring shell is fixedly connected to the bottom end of the outer wall of the inner shell.

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

[0010] A rotating cylinder two is fixedly connected to the inner wall of the fixed column. A cross rod two is slidably connected to the inner wall of the rotating cylinder two. A stirring rod is fixedly connected to the outer wall of the rotating cylinder two. A connecting rod two is fixedly connected to the bottom end of the cross rod two. An air outlet pipe is fixedly connected to the outer wall of the connecting rod two. An aerator is fixedly connected to the bottom end of the inner wall of the outer shell two. A connecting air pipe is fixedly connected to the outer wall of the aerator. The end of the connecting air pipe away from the aerator is rotatably connected to the bottom end of the connecting rod two through a rotary joint.

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

[0012] The left end of the inner wall of the rotating bracket is elastically connected to the two sides of the baffle by a spring.

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

[0014] One end of the spring is fixedly connected to the inner wall of the rotating bracket, and the other end of the spring is fixedly connected to the two side walls of the baffle.

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

[0016] One side wall of the baffle is attached to the two side walls of the square shell.

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

[0018] One end of the torsion spring is fixedly connected to the inner wall of the square shell, and the other end of the torsion spring is fixedly connected to the outer wall of the rotating bracket.

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

[0020] The outer wall of the second outer casing has an air inlet, and the top of the first outer casing has an exhaust outlet.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the rotating cylinder on the outer wall of the fixed column drives the stirring rod to move synchronously. The water flow disturbance generated by its rotation and elastic swing forms a synergistic effect with the aeration of the air outlet pipe. At the same time, the foam generated on the surface of the sewage will be dispersed and discharged in time due to the continuous movement of the rotating support, thereby avoiding the local anaerobic environment caused by foam coverage and ensuring the stable activity of aerobic microorganisms.

[0023] 2. In this utility model, the electric actuator drives the cross rod to move up and down, which in turn moves the fixed column and the rotating cylinder up and down, so that the rotating bracket and the stirring rod move synchronously. The rotating bracket can accurately reach the water surface to scrape off the foam. When it rises, it is reset by the spring to temporarily store the foam. Finally, the foam is discharged by the squeezing of the spherical body and the ring column. This adapts to different foam conditions with different water volumes. The stirring rod moves up and down to cover different depths of sewage, enhancing the stirring effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to the present invention.

[0025] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, as proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the internal components of the outer shell 1 and outer shell 2 of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, as proposed in this utility model.

[0027] Figure 4This is a schematic diagram of the square shell and rotating support structure of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, as proposed in this utility model.

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the square shell and rotating support of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, as proposed in this utility model.

[0029] Figure 6 This is a schematic diagram of the two cross-sectional structures of the square fixed column and the fixed shell of the treatment device for efficiently removing nitrogen and phosphorus from domestic sewage proposed in this utility model.

[0030] Figure 7 This is a cross-sectional structural diagram of a fixed shell for a treatment device that efficiently removes nitrogen and phosphorus from domestic sewage, as proposed in this utility model.

[0031] Legend:

[0032] 1. Outer shell one; 2. Outer shell two; 3. Motor; 4. Square shell one; 5. Electric actuator; 6. Rotating shaft; 7. Helical gear one; 8. Helical gear two; 9. Rotating drum one; 10. Fixed column; 11. Stirring rod; 12. Rotating drum two; 13. Cross rod two; 14. Air outlet pipe; 15. Rotary joint; 16. Connecting air pipe; 17. Aerator; 18. Submersible sludge pump; 19. Sludge pipe; 20. Drain pipe; 21. Water inlet pipe; 22. Water outlet pipe; 23. Ring column; 24. Inner shell; 25. Ring shell; 26. Exhaust port; 27. Air inlet port; 28. Square shell two; 29. ​​Rotating support; 30. Baffle one; 31. Connecting rod two; 32. Torsion spring; 33. Rotating rod; 34. Baffle two; 35. Spring; 36. Spherical body; 37. Guide channel; 38. Cross rod one. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 , Figure 4 and Figure 5The present invention provides an embodiment of a treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, comprising an outer shell 1, which provides space for the installation of an inner shell 24. The inner shell 24 is fixedly connected to the bottom of the inner wall of the outer shell 1, providing space for sewage treatment. An outer shell 2 is fixedly connected to the bottom of the outer shell 1, providing space for the installation of an aerator 17. A rotating cylinder 9 is rotatably connected to the top of the outer shell 1, providing space for the sliding of a cross rod 38 and driving the cross rod 38 to move and rotate. The cross rod 38 is slidably connected to the inner wall of the rotating cylinder 9, driving the fixed column 10 fixedly connected to the bottom to move up and down. The fixed column 10 is fixedly connected to the bottom of the cross rod 38, providing space for the installation of the rotating cylinder 2, driving the square shell 28 to move and rotate. The square shell 28 is fixedly connected to the outer wall of the fixed column 10, and the square shell 28 is the installation location for a torsion spring 32. The inner wall of the square shell 28 is rotatably connected to a rotating rod 33, which allows the rotating support 29 to rotate inside the square shell 28. The outer wall of the rotating rod 33 is fixedly connected to the rotating support 29, which is used to scrape off and pour out the foam. The inner wall of the square shell 28 is elastically connected to the outer wall of the rotating support 29 through a torsion spring 32. The torsion spring 32 provides elastic support for the rotating support 29 and resets the rotating support 29 after squeezing out the foam. A baffle 30 is fixedly connected to the side of the rotating support 29. A guide groove 37 is opened at the top of the rotating support 29. The guide groove 37 cooperates with the baffle 30 to prevent the foam from flowing out of the rotating support 29 when it is scraped off. A baffle 34 is slidably connected to the inner wall of the rotating support 29 to prevent the foam from flowing back into the inner shell 24 when it is poured out. A spherical body 36 is fixedly connected to the top of the baffle 30. The spherical body 36 cooperates with the ring column 23 to squeeze and tilt the rotating support 29 to pour out the foam.

[0035] Reference Figure 2 , Figure 3 and Figure 7A square shell 4 is fixedly connected to the top of the outer casing 1. The square shell 4 supports an electric actuator 5. The electric actuator 5 causes a cross rod 38, whose bottom end is rotatably connected via a bearing, to move up and down. The bottom end of the inner rod of the electric actuator 5 is rotatably connected to the top of the cross rod 38 via a bearing. A motor 3 is fixedly connected to the top of the outer casing 1. The motor 3 provides rotational power. A rotating shaft 6 is fixedly connected to the output shaft of the motor 3, which drives the rotational force of the motor 3 to a helical gear 8 fixed to the outer wall. A helical gear 8 is fixedly connected to the outer wall of the rotating shaft 6. The helical gear 8 carries the rotational force to a helical gear 7 meshing with the outer wall of the helical gear 7. The helical gear 7 carries the rotational force to a rotating cylinder 9 fixedly connected to the inner wall of the rotating cylinder 9. The inner wall of the helical gear 7 is fixedly connected to the outer wall of the rotating cylinder 9. Next, a mud pipe 19 is fixedly connected to the outer wall of the outer shell 1. A submersible mud pump 18 is fixedly connected to the bottom end of the mud pipe 19. The submersible mud pump 18 cooperates with the mud pipe 19 to carry the sludge at the bottom end of the inner wall of the inner shell 24 out of the outer shell 1. A water inlet pipe 21 is fixedly connected to the outer wall of the outer shell 1. A water outlet pipe 22 is fixedly connected to the outer wall of the outer shell 1. The outer wall of the water inlet pipe 21 is fixedly connected to the inner wall of the inner shell 24. The outer wall of the water outlet pipe 22 is fixedly connected to the inner wall of the inner shell 24. The outer wall of the mud pipe 19 is fixedly connected to the inner wall of the inner shell 24. A drain pipe 20 is fixedly connected to the outer wall of the outer shell 1. A ring column 23 is fixedly connected to the top end of the inner wall of the outer shell 1. A ring shell 25 is fixedly connected to the bottom end of the outer wall of the inner shell 24. The ring shell 25 guides the foam poured out between the inner shell 24 and the outer shell 1 to the drain pipe 20 and cooperates with the drain pipe 20 to discharge the foam out of the outer shell 1.

[0036] Reference Figure 4-6A rotating cylinder 12 is fixedly connected to the inner wall of the fixed column 10. The rotating cylinder 12 provides space for the sliding of the cross rod 13 and drives the cross rod 13 to rotate. The cross rod 13 is slidably connected to the inner wall of the rotating cylinder 12. The cross rod 13 drives the connecting rod 31 fixedly connected to the bottom to rotate. A stirring rod 11 is fixedly connected to the outer wall of the rotating cylinder 12. The stirring rod 11 is driven to rotate and move by the rotating cylinder 12 to fully mix the sewage and gas. A connecting rod 31 is fixedly connected to the bottom end of the cross rod 13. The connecting rod 31 drives the air outlet pipe 14 to rotate. An air outlet pipe 14 is fixedly connected to the outer wall of the connecting rod 31. The air outlet pipe 14 is driven to rotate by the connecting rod 31 to evenly aerate the sewage. An aerator 17 is fixedly connected to the bottom end of the inner wall of the outer shell 2. The aerator 17 continuously supplies gas. A connecting air pipe 16 is fixedly connected to the outer wall of the aerator 17. Pipe 16 delivers gas. The end of the connecting pipe 16 away from the aerator 17 is rotatably connected to the bottom end of the connecting rod 31 via a rotary joint 15. The rotary joint 15 prevents the connecting pipe 16 from being affected by rotation. The left end of the inner wall of the rotating bracket 29 is elastically connected to the side end of the baffle 34 via a spring 35. When the foam is poured out, the spring 35 pops out the baffle 34. One end of the spring 35 is fixedly connected to the inner wall of the rotating bracket 29, and the other end of the spring 35 is fixedly connected to the side wall of the baffle 34. The side wall of the baffle 30 fits against the side wall of the square shell 28. One end of the torsion spring 32 is fixedly connected to the inner wall of the square shell 28, and the other end of the torsion spring 32 is fixedly connected to the outer wall of the rotating bracket 29. An air inlet 27 is opened on the outer wall of the outer shell 2, allowing external gas to flow into the device. An exhaust 26 is opened at the top of the outer shell 1, allowing the gas inside the device to be discharged to the outside.

[0037] Working principle: When aeration is required for nitrogen and phosphorus removal in wastewater, the wastewater can flow into the inner shell 24, which is fixedly connected to the bottom of the inner wall of the outer shell 1, through the inlet pipe 21. The aerator 17, which is fixedly connected to the top of the inner wall of the outer shell 2, will continuously supply air. The gas enters the outlet pipe 14 through the connecting air pipe 16. The outlet pipe 14 will rotate with the connecting rod 31 to make the gas evenly distributed in the wastewater.

[0038] When motor 3 starts, it drives the rotating shaft 6, which is fixedly connected to the output shaft, to rotate. The rotating shaft 6 drives the helical gear 8, which is connected to the outer wall, to rotate. The helical gear 8 drives the helical gear 7, which is meshed with the outer wall, to rotate. The helical gear 7 drives the rotating cylinder 9, which is fixedly connected to the inner wall, to rotate. The rotating cylinder 9 drives the cross rod 38, which is slidably connected to the inner wall, to rotate. The cross rod 38 drives the fixed column 10, which is fixedly connected to the bottom, to rotate. The fixed column 10 drives the rotating cylinder 12, which is fixedly connected to the inner wall, to rotate. The rotating cylinder 12 drives the stirring rod 11, which is fixedly connected to the outer wall, to rotate. The rotating cylinder 12, which is slidably connected to the inner wall, drives the cross rod 13, which is slidably connected to the inner wall, to rotate. The cross rod 13 drives the connecting rod 31, which is fixedly connected to the bottom, to rotate. The stirring rod 11 continuously stirs the sewage, allowing the impurities in the sewage to fully mix with the microorganisms and aerated air in the pool. Moreover, the stirring rod 11 moves up and down with the rotating cylinder 12, which is fixedly connected to the inner wall of the fixed column 10. The stirring produces foam that floats on the water surface.

[0039] The electric actuator 5 extends and pushes the cross rod 38, which is fixedly connected to the inner rod, downward. The cross rod 38 drives the fixed column 10 to move downward. The fixed column 10 drives the square shell 28, which is fixed to the outer wall, to move downward. The rotating bracket 29, which is fixed to the inner wall of the square shell 28, moves downward to the water surface along with the square shell 28. The baffle 34, which is slidably connected to the inner wall of the rotating bracket 29, is squeezed back by the inner wall and compresses the spring 35. The fixed column 10 drives the square shell 28, which is fixed to the outer wall, to rotate. The rotating bracket 29 follows the rotation of the square shell 28 and scrapes the bubbles generated on the surface of the sewage into the guide groove 37 opened at the top of the rotating bracket 29. After scraping, the electric actuator 5 retracts. The square shell 28 moves upward and drives the rotating bracket 29 upward. When it reaches above the inner shell 24, the rotating bracket 29 moves upward. The baffle 2 34, which is slidably connected to the wall, is ejected by the spring 35 to prevent the water in the guide channel 37 from flowing back into the inner shell 24. It moves upward again. The spherical body 36, which is fixedly connected to the inner wall of the baffle 1 30, which is fixedly connected to the side end of the rotating bracket 29, will press against the annular column 23, which is fixedly connected to the top of the inner wall of the outer shell 1. This will cause the rotating bracket 29 to rotate and tilt around the rotating rod 33, which is fixedly connected to the inner wall, so that the foam in the guide channel 37 flows onto the baffle 2 34 and then flows into the gap between the outer shell 1 and the inner shell 24. Finally, the foam will be guided by the annular shell 25, which is fixedly connected to the bottom of the inner wall of the outer shell 1, and flow out from the drain pipe 20. When the electric push rod 5 extends, it will cause the rotating bracket 29 to move downward. The rotating bracket 29 will be reset due to the force of the torsion spring 32. The electric push rod 5 will start again after a period of time.

[0040] The air inlet 27 on the outer wall of the outer shell 2 and the exhaust 26 on the top of the outer shell 1 will allow better air circulation between the outside air and the air in the pool. The submersible sludge pump 18, which is fixedly connected to the bottom of the inner wall of the outer shell 1, will carry out the sludge settled at the bottom of the pool through the sludge pipe 19. Finally, after a long period of treatment, the pool water will flow into the next treatment device through the outlet pipe 22.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A treatment device for efficiently removing nitrogen and phosphorus from domestic sewage, comprising a casing (1), characterized in that: An inner shell (24) is fixedly connected to the bottom of the inner wall of the outer shell (1). An outer shell (2) is fixedly connected to the bottom of the outer shell (1). A rotating cylinder (9) is rotatably connected to the top of the outer shell (1). A cross rod (38) is slidably connected to the inner wall of the rotating cylinder (9). A fixing post (10) is fixedly connected to the bottom of the cross rod (38). A square shell (28) is fixedly connected to the outer wall of the fixing post (10). A rotating rod is rotatably connected to the inner wall of the square shell (28). (33) A rotating bracket (29) is fixedly connected to the outer wall of the rotating rod (33). The inner wall of the square shell (28) is elastically connected to the outer wall of the rotating bracket (29) through a torsion spring (32). A baffle (30) is fixedly connected to the side end of the rotating bracket (29). A guide groove (37) is opened at the top of the rotating bracket (29). A baffle (34) is slidably connected to the inner wall of the rotating bracket (29). A spherical body (36) is fixedly connected to the top of the baffle (30).

2. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: A square shell (4) is fixedly connected to the top of the outer shell (1). An electric actuator (5) is fixedly connected to the top of the square shell (4). The bottom end of the inner rod of the electric actuator (5) is rotatably connected to the top of the cross rod (38) via a bearing. A motor (3) is fixedly connected to the top of the outer shell (1). A rotating shaft (6) is fixedly connected to the output shaft of the motor (3). A helical gear (8) is fixedly connected to the outer wall of the rotating shaft (6). A helical gear (7) is meshed with the outer wall of the helical gear (8). The inner wall of the helical gear (7) is fixedly connected to the outer wall of the rotating cylinder (9). A mud pipe (19) is fixedly connected to the outer wall of the outer shell (1). A submersible sludge pump (18) is fixedly connected to the bottom end of the mud pipe (19). An inlet pipe (21) is fixedly connected to the outer wall of the outer shell (1). An outlet pipe (22) is fixedly connected to the outer wall of the outer shell (1). The outer wall of the inlet pipe (21) is fixedly connected to the inner wall of the inner shell (24). The outer wall of the outlet pipe (22) is fixedly connected to the inner wall of the inner shell (24). The outer wall of the mud pipe (19) is fixedly connected to the inner wall of the inner shell (24). A drain pipe (20) is fixedly connected to the outer wall of the outer shell (1). A ring column (23) is fixedly connected to the top end of the inner wall of the outer shell (1). A ring shell (25) is fixedly connected to the bottom end of the outer wall of the inner shell (24).

3. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: A rotating cylinder (12) is fixedly connected to the inner wall of the fixed column (10). A cross rod (13) is slidably connected to the inner wall of the rotating cylinder (12). A stirring rod (11) is fixedly connected to the outer wall of the rotating cylinder (12). A connecting rod (31) is fixedly connected to the bottom end of the cross rod (13). An air outlet pipe (14) is fixedly connected to the outer wall of the connecting rod (31). An aerator (17) is fixedly connected to the bottom end of the inner wall of the outer shell (2). A connecting air pipe (16) is fixedly connected to the outer wall of the aerator (17). The end of the connecting air pipe (16) away from the aerator (17) is rotatably connected to the bottom end of the connecting rod (31) through a rotary joint (15).

4. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: The left end of the inner wall of the rotating bracket (29) is elastically connected to the side end of the baffle (34) via a spring (35).

5. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 4, characterized in that: One end of the spring (35) is fixedly connected to the inner wall of the rotating bracket (29), and the other end of the spring (35) is fixedly connected to the side wall of the second baffle (34).

6. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: The side wall of the first baffle (30) is attached to the side wall of the second square shell (28).

7. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: One end of the torsion spring (32) is fixedly connected to the inner wall of the square shell (28), and the other end of the torsion spring (32) is fixedly connected to the outer wall of the rotating bracket (29).

8. The treatment device for efficiently removing nitrogen and phosphorus from domestic sewage according to claim 1, characterized in that: The outer wall of the second outer shell (2) is provided with an air inlet (27), and the top of the first outer shell (1) is provided with an exhaust hole (26).

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