Aeration device applied to MBBR (Moving Bed Biofilm Reactor) process and aeration method thereof

Abstract

The invention relates to the related technical field of water treatment, discloses an aeration device applied to an MBBR (moving bed biofilm reactor) process and an aeration method thereof, and aims to solve the problem of limited single-pipe aeration coverage. An aeration transverse pipe is movably mounted at the bottom of an aeration vertical pipe, and the center line of the aeration transverse pipe is relatively perpendicular to that of the aeration vertical pipe; a plurality of aeration holes are formed in the same side part of the aeration transverse pipe, when air flow in the aeration vertical pipe is discharged through the aeration holes in the aeration transverse pipe, high-speed air flow discharged from the aeration holes realizes aeration, and meanwhile, the air flow acts on sewage in the sedimentation tank to force the aeration transverse pipe to have a tendency of rotating at the bottom of the aeration vertical pipe; power is provided according to the aeration holes to force the aeration holes to rotate continuously, so that the actual aeration range of the bottom of the detection cylinder is circular, and finally the effect of expanding the aeration range by rotary aeration is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and particularly to an aeration device and an aeration method applied to the MBBR process. Background Art

[0002] MBBR, that is, Moving Bed Biofilm Reactor, is an efficient biological treatment technology and is widely used in the field of sewage treatment.

[0003] The working principle of MBBR is based on the biofilm method. By adding a certain number of suspended carriers (packing materials) to the reactor, these carriers provide a surface for microorganisms to attach and grow. Under the condition of oxygenation, the sewage flows through the packing materials at a certain flow rate, and microorganisms form a biofilm on the surface of the packing materials. The microorganisms in the biofilm use organic matters, nitrogen, phosphorus and other pollutants in the sewage as nutrient sources for metabolic activities, and convert them into harmless substances such as carbon dioxide, water and nitrogen, thereby realizing the purification of sewage.

[0004] After retrieval, the publication number CN208166693U discloses an aerated biological filter, including an aeration pipe vertically inserted into the biological filter layer, and a microporous aerator is installed at one inserted end. If the microporous aerator is blocked, the aeration pipe can be directly pulled out and a new microporous aerator can be replaced. The replacement process is simple and the maintenance cost is low.

[0005] In the actual application process of this device, due to the relatively limited diameter of the aeration pipe, this directly leads to a relatively limited aeration coverage range of a single aeration pipe. In order to achieve the full aeration of the biological filter layer, it is necessary to increase the number of aeration pipes used. However, too many aeration pipes not only make the layout of the gas pipeline complex and cumbersome, but also bring great difficulties to the staff during maintenance and replacement, increasing the difficulty of subsequent maintenance and replacement. Summary of the Invention

[0006] The present invention provides an aeration device and an aeration method applied to the MBBR process, which have the advantage of expanding the aeration range by rotational aeration, and are used to solve the problem of limited aeration coverage range of single-pipe aeration proposed in the above background art.

[0007] To achieve the above object, the present invention adopts the following technical scheme: An aeration device applied to the MBBR process includes: a sedimentation tank, with a biological filter layer installed in the middle and a gas supply pipe installed at the top. The side of the gas supply pipe is connected with an aeration vertical pipe located below the biological filter layer; a rotating base, movably installed at the bottom of the aeration vertical pipe, and a rotating base is movably installed at the bottom of the rotating base with an aeration horizontal pipe perpendicular to the aeration vertical pipe. Aeration holes are provided on the side of the aeration horizontal pipe; the airflow impact on the sewage in the sedimentation tank in the aeration holes can cause the aeration horizontal pipe to generate torque and drive the rotating base to rotate.

[0008] Furthermore, an axial flow fan blade is movably sleeved outside the aeration vertical pipe. A traction rod is fixedly installed at the bottom of the axial flow fan blade, and a pull rope is fixedly connected between the bottom of the traction rod and the aeration horizontal pipe. An inspection cylinder arranged coaxially with the aeration vertical pipe is movably installed outside the axial flow fan blade. An installation screw rod is movably installed inside the inspection cylinder, and the top of the installation screw rod is threadedly connected to the outer side of the aeration vertical pipe.

[0009] Furthermore, the inspection cylinder is in the shape of a cylinder with a through middle part.

[0010] Furthermore, an inspection seat located above the inspection cylinder is movably installed outside the aeration vertical pipe, and a spring is connected between the top of the inspection seat and the outer side of the aeration vertical pipe.

[0011] Furthermore, a pressure regulating cylinder is threadedly connected to the outer side of the aeration vertical pipe, and the top of the spring abuts against the bottom end of the pressure regulating cylinder.

[0012] Furthermore, an alarm whistle is fixedly installed outside the aeration vertical pipe, and the alarm whistle is located above the top of the inspection seat.

[0013] An aeration method for an aeration device applied to the MBBR process includes the following steps:

[0014] S1. Sewage is input from the bottom of the sedimentation tank, purified through the biological filter layer, and then discharged outwards from the top of the sedimentation tank.

[0015] S2. Start the air compressor and input air source into the air supply pipe. The air flow is input into the rotary base through the aeration vertical pipe. The air in the rotary base is input into the inner cavity of the aeration horizontal pipe from the end of the aeration horizontal pipe, and finally discharged into the sewage in the sedimentation tank through the aeration holes to complete the aeration work.

[0016] S3. When the high-speed air flow is ejected outwards from the aeration holes, the air flow impacts the sewage in the sedimentation tank, forcing the aeration horizontal pipe to generate torque. The aeration horizontal pipe drives the rotary base to rotate at the bottom of the aeration vertical pipe, and the aeration horizontal pipe drives the position of the aeration holes to change, so that the aeration position changes.

[0017] The present invention has the following beneficial effects:

[0018] An aeration device and an aeration method applied to the MBBR process provided by the present invention, by movably installing an aeration horizontal pipe at the bottom of the aeration vertical pipe, the center line of the aeration horizontal pipe and the aeration vertical pipe are relatively perpendicular. Moreover, a plurality of aeration holes are uniformly arranged on the same side of the aeration horizontal pipe.

[0019] During the working process, when air flow is introduced into the vertical aeration pipe, the air flow will be discharged through the aeration holes on the horizontal aeration pipe. While achieving the aeration function, these high-speed air flows discharged from the aeration holes will exert a force on the sewage in the sedimentation tank. Due to the impact and disturbance of the air flow, a torque that causes it to rotate will act on the horizontal aeration pipe at the bottom of the vertical aeration pipe, thus generating a tendency to rotate.

[0020] The air flow discharged from the aeration holes provides continuous power for the rotation of the horizontal aeration pipe. Under the continuous action of the air flow, the horizontal aeration pipe will keep rotating. As the horizontal aeration pipe rotates, the area it covers is also constantly changing, making the actual aeration range at the bottom of the detection cylinder present a circular area. Through this rotating aeration method, the aeration range can be effectively expanded and the sewage treatment effect can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of the specification depict the embodiments disclosed by the present invention and, together with the specification, are used to explain the principles disclosed by the present invention.

[0022] Referring to the drawings, the present invention can be more clearly understood according to the following detailed description, wherein:

[0023] Figure 1 is a schematic external three-dimensional structure diagram of the whole of the present invention;

[0024] Figure 2 is a schematic internal plan view of the whole of the present invention;

[0025] Figure 3 is a schematic external three-dimensional structure diagram of the aeration structure of the present invention;

[0026] Figure 4 is a schematic internal sectional structure diagram of the aeration structure in the present invention;

[0027] Figure 5 is Figure 4 an enlarged structure diagram at position E in

[0028] In the drawings: 1, sedimentation tank; 2, biological filter layer; 3, air supply pipe; 4, vertical aeration pipe; 5, pressure regulating cylinder; 6, installation screw; 7, detection seat; 8, spring; 9, detection cylinder; 10, rotating base; 11, horizontal aeration pipe; 110, aeration hole; 12, alarm whistle; 13, axial flow fan blade; 14, towing rod; 140, pull rope. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Example 1, please refer to Figure 1 It can be seen that the sedimentation tank 1 is mainly used to provide a space for storing sewage. A biological filter layer 2 for purifying sewage is fixedly installed in the middle of the sedimentation tank 1. During application, sewage is introduced into the sedimentation tank 1 from the bottom through a pipeline. After being purified by the biological filter layer 2, it is discharged outwards from the cofferdam at the top of the sedimentation tank 1.

[0031] During use, by aerating the bottom of the biological filter layer 2, necessary oxygen is provided for microorganisms, supporting the metabolic activities of aerobic microorganisms and promoting the degradation of organic matter and the nitrification reaction of ammonia nitrogen. For the aeration structure, from Figure 1 and Figure 2 It can be seen that an air supply pipe 3 horizontally arranged above the biological filter layer 2 is fixedly installed at the top of the sedimentation tank 1. The end of the air supply pipe 3 is generally connected to an air compressor, and the power / frequency of the air compressor is set at 3kw / 50HZ. Ensure that the air compressor can input stable air flow into the air supply pipe 3. The side of the air supply pipe 3 is threadedly connected with an aeration vertical pipe 4. The aeration vertical pipe 4 is vertically arranged and there are multiple of them. The bottom end of the aeration vertical pipe 4 passes through the biological filter layer 2 and is located below. The air ejected from the bottom of the aeration vertical pipe 4 is placed below the biological filter layer 2 to complete the aeration work.

[0032] Since the coverage range of the air flow ejected from the bottom of the aeration vertical pipe 4 is relatively limited, in order to increase the aeration range, from Figure 2 、 Figure 4 and Figure 5 It can be seen that a rotating base 10 is movably installed at the bottom of the aeration vertical pipe 4, and the rotating base 10 can only rotate at the bottom of the aeration vertical pipe 4. Moreover, the rotation center line of the rotating base 10 coincides with the center line of the aeration vertical pipe 4. The inner cavity of the rotating base 10 is interconnected with the inner cavity of the aeration vertical pipe 4. The air flow in the aeration vertical pipe 4 will eventually be input into the inner cavity of the rotating base 10. A horizontal aeration pipe 11 perpendicular to the central axis of the aeration vertical pipe 4 is movably installed at the bottom of the rotating base 10, and the inner cavity of the horizontal aeration pipe 11 is interconnected with the inner cavity of the rotating base 10. More importantly, equally spaced air holes 110 are opened on the same side of the horizontal aeration pipe 11, and the air in the horizontal aeration pipe 11 can be released into the sewage in the sedimentation tank 1 through the air holes 110.

[0033] In actual application, sewage is input through the bottom of the sedimentation tank 1, and after being purified by the biological filter material layer 2, it is discharged from the cofferdam position at the top of the sedimentation tank 1. At the same time, the air compressor is started and a stable air source is input into the air supply pipe 3, and the air flow is input into the rotating base 10 through the aeration vertical pipe 4. The air in the rotating base 10 is input into the inner cavity of the aeration horizontal pipe 11 from the end of the aeration horizontal pipe 11, and finally discharged from the aeration hole 110 into the sewage in the sedimentation tank 1, completing the aeration work.

[0034] Since the aeration holes 110 are placed on the same side of the aeration transverse pipe 11, when the aeration holes 110 eject high-speed airflow outward, on the one hand, the air is discharged into the sewage in the inner cavity of the sedimentation tank 1; on the other hand, when the airflow impacts the sewage in the sedimentation tank 1, the aeration transverse pipe 11 is forced to generate torque, and the aeration transverse pipe 11 drives the rotating base 10 to rotate at the bottom of the aeration vertical pipe 4. The aeration transverse pipe 11 drives the position of the aeration holes 110 to change, which also causes the aeration position to change. Since the aeration transverse pipe 11 rotates continuously, the aeration range of the aeration vertical pipe 4 is finally distributed in a circular shape.

[0035] The advantage of this arrangement is that, in the circular area covered by the aeration horizontal pipe 11, no other aeration vertical pipes 4 need to be arranged for aeration, thus reducing the use of aeration vertical pipes 4 and simplifying the arrangement of the gas pipeline.

[0036] Embodiment 2 is a further improvement on Embodiment 1. Figure 3 and Figure 4 It can be seen that the outer side of the aeration vertical pipe 4 is movably equipped with an axial flow blade 13, and a traction rod 14 is fixedly installed at the bottom of the axial flow blade 13. The traction rod 14 is movably connected to the rotating base 10. There are generally three traction rods 14, and the three traction rods 14 are arranged in a circular shape with equal angles. On the one hand, the axial flow blade 13 is guided by the traction rod 14 so that it can reciprocate up and down along the axial direction of the aeration vertical pipe 4. On the other hand, when the rotating base 10 rotates, the axial flow blade 13 is driven by the traction rod 14 to force the axial flow blade 13 to rotate synchronously. A pull rope 140 is fixedly connected between the bottom of the traction rod 14 and the aeration cross pipe 11. Since the aeration cross pipe 11 and the bottom of the rotating base 10 are mainly hinged, when the traction rod 14 pulls the aeration cross pipe 11 upward through the pull rope 140, the aeration cross pipe 11 and the aeration vertical pipe 4 are relatively vertically arranged; similarly, when the traction rod 14 pushes the aeration cross pipe 11 downward, the aeration cross pipe 11 can be deflected downward based on the bottom of the traction rod 14 hitting the side of the aeration cross pipe 11 until the aeration cross pipe 11 and the aeration vertical pipe 4 are both in a vertical arrangement.

[0037] At the same time, a detection cylinder 9 coaxially arranged with the aeration vertical pipe 4 is movably installed outside the axial flow blade 13. The axial flow blade 13 can not only rotate relatively inside the detection cylinder 9, but the detection cylinder 9 can also move up and down synchronously with the axial flow blade 13.Figure 3 and Figure 4 As can be seen, the mounting screw rod 6 is movably installed inside the detection cylinder 9, and the top of the mounting screw rod 6 is threadedly connected to the outer side of the aeration vertical pipe 4. According to the handle fixedly installed at the top of the mounting screw rod 6, the mounting screw rod 6 can be rotated and move up and down along the axial direction of the aeration vertical pipe 4. Generally speaking, when the mounting screw rod 6 is screwed in to the upper limit, the mounting screw rod 6 pulls the detection cylinder 9 to move upward. The detection cylinder 9 pulls the aeration cross pipe 11 to move upward synchronously according to the axial flow fan blade 13, the traction rod 14 and the pull rope 140 until the side of the aeration cross pipe 11 abuts against the bottom of the rotary base 10. At this time, the aeration cross pipe 11 and the aeration vertical pipe 4 are relatively perpendicular to each other. Similarly, when the mounting screw rod 6 is screwed in reversely and moves downward, the traction rod 14 finally abuts against the side of the aeration cross pipe 11, and the aeration cross pipe 11 deflects downward until it is in a relatively vertical arrangement with the aeration vertical pipe 4. The advantage of this design is that by manually controlling the deflection of the aeration cross pipe 11, when the aeration cross pipe 11 is installed, according to the fact that the aeration cross pipe 11 and the aeration vertical pipe 4 are both in a vertical state, it is easier to pass through the biological filter layer 2; when the aeration cross pipe 11 is working, through the operator's adjustment of the mounting screw rod 6, the detection cylinder 9 is pulled upward until the aeration cross pipe 11 and the aeration vertical pipe 4 are relatively vertically arranged.

[0038] Since the air holes 110 will be blocked after long-term operation, this will cause the air flow to be unable to be discharged normally. From Figure 4 and Figure 5 As can be seen, a detection seat 7 is movably installed outside the aeration vertical pipe 4 above the detection cylinder 9. Since the detection cylinder 9 is in the shape of a cylinder with a through middle part, when the detection seat 7 presses on the top of the detection cylinder 9, the top opening of the detection cylinder 9 can be relatively closed. Further, a spring 8 is connected between the top of the detection seat 7 and the outside of the aeration vertical pipe 4. Pushed by the elastic force of the spring 8, it is ensured that the detection seat 7 always blocks the top opening of the detection cylinder 9 under normal conditions. From the above work content, it can be known that when the aeration cross pipe 11 is working, it will cause the rotary base 10 to rotate rapidly. When the detection seat 7 blocks the top of the detection cylinder 9, when the aeration cross pipe 11 drives the rotary base 10 to rotate rapidly, the rotation of the axial flow fan blade 13 will cause the sewage in the sedimentation tank 1 to enter the inner cavity of the detection cylinder 9. As the sewage in the inner cavity of the detection cylinder 9 increases, it will push the detection seat 7 to compress the spring 8 upward, and the spring 8 is compressed and stores energy. Since the detection seat 7 needs to overcome the storage resistance of the spring 8 when moving upward, this is equivalent to an increase in the load when the axial flow fan blade 13 conveys water into the detection cylinder 9. Since the air flow pressure input into the aeration cross pipe 11 is relatively constant, the air flow intensity discharged from the air holes 110 is also relatively constant. Finally, the torque actually generated by the rotary base 10 is relatively constant. The operator only needs to adjust the intensity of the load that the detection seat 7 can generate, and can also adjust the movement speed of the rotary base 10 within a certain range. More detailed, combined with Figure 4It can be seen that a pressure regulating cylinder 5 is threadedly connected to the outside of the aeration vertical pipe 4, and the top of the spring 8 abuts against the bottom end of the pressure regulating cylinder 5. By rotating the pressure regulating cylinder 5, the intensity of the downward pressing on the spring 8 can be adjusted, and thus the load intensity of the upward movement of the detection seat 7 can be adjusted. Finally, by adjusting the load intensity of the axial flow fan blade 13, the actual rotation speed of the rotating base 10 can be affected.

[0039] From Figure 3 and Figure 4 It can be seen that an alarm whistle 12 is fixedly installed on the outside of the aeration vertical pipe 4. The alarm whistle 12 is located above the top of the detection seat 7. Under normal conditions, when the detection seat 7 blocks the top of the detection cylinder 9, the aeration vertical pipe 4 is communicated with the outside through the alarm whistle 12, so that the air flow in the inner cavity of the aeration vertical pipe 4 is discharged from the alarm whistle 12, and the alarm whistle 12 can make a sound; when the sewage in the detection cylinder 9 increases and causes the detection seat 7 to be pushed upward, the detection seat 7 can block the alarm whistle 12, thereby preventing it from making a sound. Thus, it can be seen that whether the detection seat 7 can have the condition of upward movement depends on whether the axial flow fan blade 13 injects sewage medium into the inner cavity of the detection cylinder 9. If the air holes 110 normally discharge air flow outward, the aeration horizontal pipe 11 can drive the rotating base 10 to drive the axial flow fan blade 13 to rotate; on the contrary, if the air holes 110 are blocked, the rotating base 10 will not rotate either. By using whether the alarm whistle 12 makes a sound, it is possible to accurately judge whether the air holes 110 are working.

[0040] During actual application: When installation is required, by screwing down the installation screw 6, the detection cylinder 9 drives the axial flow fan blade 13 to be pushed downward. The axial flow fan blade 13 abuts against the side of the aeration horizontal pipe 11 through the traction rod 14, so that both the aeration horizontal pipe 11 and the aeration vertical pipe 4 are arranged relatively vertically. After passing the aeration horizontal pipe 11 and the aeration vertical pipe 4 through the biological filter layer 2, the top of the aeration vertical pipe 4 is threadedly connected to the air supply pipe 3. Then, screw up the installation screw 6, so that the detection cylinder 9 pulls the aeration horizontal pipe 11 to deflect upward through the axial flow fan blade 13, the traction rod 14 and the pull rope 140 until the aeration horizontal pipe 11 is perpendicular to the aeration vertical pipe 4. The detection seat 7 is pushed downward by the elastic force of the spring 8 and blocks the top of the detection cylinder 9. The detection seat 7 is located below the alarm whistle 12.

[0041] During normal operation, the air compressor inputs airflow into the rotating base 10 through the air supply pipe 3 and the aeration vertical pipe 4. The airflow passes through the inner cavity of the rotating base 10 and the aeration horizontal pipe 11 and is quickly discharged from the aeration hole 110. When the airflow discharged from the aeration hole 110 impacts the sewage, the aeration horizontal pipe 11 will drive the rotating base 10 to rotate. The rotating base 10 drives the axial flow blades 13 to rotate synchronously and rapidly through the traction rod 14. The rotating axial flow blades 13 continuously inject the sewage in the sedimentation tank 1 into the detection tube 9. When the sewage in the detection tube 9 increases, it will push the detection seat 7 to compress the spring 8 upward. The load provided by the elastic force of the spring 8 will increase the rotation resistance of the axial flow blades 13 relatively, thereby preventing the rotating base 10 from rotating too fast. At the same time, when the detection seat 7 moves upward, the inner side will block the alarm whistle 12 to ensure that the alarm whistle 12 will not make a sound when the aeration horizontal pipe 11 is working normally.

[0042] When the aeration hole 110 is blocked, the airflow in the aeration cross pipe 11 cannot be discharged from the aeration hole 110 normally. The lack of airflow discharged from the aeration hole 110 means that the aeration cross pipe 11 cannot drive the rotating base 10 to rotate, and the axial flow fan blades 13 will no longer input sewage into the inner cavity of the detection cylinder 9. The detection seat 7 moves downward under the elastic force of the spring 8 and reaches the top of the detection cylinder 9. The detection seat 7 no longer blocks the alarm whistle 12, and the airflow in the aeration vertical pipe 4 flows out from the alarm whistle 12, and the alarm whistle 12 makes a sound.

[0043] Finally, the operator can dismantle the aeration vertical pipe 4 that cannot be used normally for maintenance through the sounding part. Regarding the disassembly method, refer to the above installation method, first put the aeration horizontal pipe 11 and the aeration vertical pipe 4 in a vertical state, and dismantle the aeration vertical pipe 4 from the air supply pipe 3.

Claims

1. An aeration device applied to MBBR process, characterized in that: include: A sedimentation tank (1) is provided with a biological filter material layer (2) in the middle, an air supply pipe (3) is provided at the top, and the side of the air supply pipe (3) is connected to an aeration vertical pipe (4) located below the biological filter material layer (2); A rotating base (10) is movably mounted at the bottom of the aeration vertical pipe (4); an aeration horizontal pipe (11) perpendicular to the aeration vertical pipe (4) is movably mounted at the bottom of the rotating base (10); and an aeration hole (110) is provided on the side of the aeration horizontal pipe (11); The airflow in the aeration hole (110) impacts the sewage in the sedimentation tank (1), which can cause the aeration transverse pipe (11) to generate torque and drive the rotating base (10) to rotate.

2. The aeration device used in MBBR process according to claim 1, characterized in that: An axial flow fan blade (13) is movably mounted on the outer side of the aeration vertical pipe (4), a traction rod (14) is fixedly mounted on the bottom of the axial flow fan blade (13), and a pull rope (140) is fixedly connected between the bottom of the traction rod (14) and the aeration horizontal pipe (11); A detection cylinder (9) coaxially arranged with the aeration vertical pipe (4) is movably mounted on the outside of the axial flow blade (13), a mounting screw (6) is movably mounted on the inside of the detection cylinder (9), and a top of the mounting screw (6) is threadedly connected to the outside of the aeration vertical pipe (4).

3. The aeration device applied to MBBR process according to claim 2, characterized in that: The detection tube (9) is in the shape of a cylinder with a through middle.

4. The aeration device applied to MBBR process according to claim 3, characterized in that: A detection seat (7) located above the detection cylinder (9) is movably installed on the outside of the aeration vertical pipe (4), and a spring (8) is connected between the top of the detection seat (7) and the outside of the aeration vertical pipe (4).

5. The aeration device used in MBBR process according to claim 4, characterized in that: The outer side of the aeration vertical pipe (4) is threadedly connected to a pressure regulating cylinder (5), and the top of the spring (8) abuts against the bottom end of the pressure regulating cylinder (5).

6. The aeration device for MBBR process according to claim 4, characterized in that: An alarm whistle (12) is fixedly installed on the outside of the aeration vertical pipe (4), and the alarm whistle (12) is located above the top of the detection seat (7).

7. An aeration method for an aeration device applied to an MBBR process as claimed in claim 1, characterized in that: The following steps are involved: S1, sewage is input from the bottom of the sedimentation tank (1), purified by the biological filter layer (2), and then discharged from the top of the sedimentation tank (1); S2, start the air compressor and input the air source into the air supply pipe (3), the air flow is input into the rotating base (10) through the aeration vertical pipe (4), the air in the rotating base (10) is input into the inner cavity of the aeration horizontal pipe (11) from the end of the aeration horizontal pipe (11), and finally discharged from the aeration hole (110) into the sewage in the sedimentation tank (1), thereby completing the aeration work; S3. When the aeration holes (110) eject high-speed airflow outward, the airflow impacts the sewage in the sedimentation tank (1), forcing the aeration horizontal pipe (11) to generate torque. The aeration horizontal pipe (11) drives the rotating base (10) to rotate at the bottom of the aeration vertical pipe (4). The aeration horizontal pipe (11) drives the aeration holes (110) to change their positions, thereby changing the aeration position.

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