Aeration device for sewage treatment

Abstract

The utility model belongs to the technical field of aeration equipment, and particularly relates to an aeration device for sewage treatment. According to the technology, an aeration tank is included, and an aeration assembly used for injecting air into sewage is arranged in the aeration tank; a cleaning assembly for cleaning residues at the bottom of the aeration tank is arranged below the aeration assembly; a groove is formed in the edge of the bottom of the aeration tank, and a collecting assembly for collecting residues at the bottom of the aeration tank is arranged in the groove. According to the aeration tank, the problem that residues at the bottom of the aeration tank are inconvenient to clean is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aeration equipment, and particularly relates to an aeration device for sewage treatment. Background Technique

[0002] Aeration devices play a crucial role in sewage treatment. By injecting air into the water body, they increase the dissolved oxygen concentration, promote the degradation and decomposition of microorganisms in organic wastewater and bottom sludge, and help improve the ecological environment of the water body and enhance the self-purification ability of the water body.

[0003] The aeration device mainly consists of an aeration tank, aerators, air delivery equipment, and pipelines; the aerators can release air into the water in the form of bubbles; the air delivery equipment mainly includes an air compressor or a blower, which is used to compress and deliver air to the aerators; the pipelines are used to connect the air delivery equipment and the aerators to evenly distribute the compressed air to each aerator; during installation, the aerators are installed on the pipelines, and the pipelines and aerators are installed at the bottom of the aeration tank; then the air delivery equipment is connected and communicated with the pipelines; during use, the sewage to be treated is injected into the aeration tank, and then air can be input into the pipelines through the air delivery equipment, and then the air is released from the bottom of the aeration tank through the aerators, and the air can be injected into the sewage, so as to achieve the purpose of treating the sewage.

[0004] During the use of the aeration device, although the sewage can be treated, when the sewage in the aeration tank is discharged, there may be residual sludge and garbage at the bottom of the aeration tank. These residues mainly come from suspended solids, colloidal substances in the sewage, and biological flocs produced by the metabolism of the microbial population; if not cleaned in time, these residues will form deposits at the bottom of the tank, affecting the sewage treatment efficiency and effect; however, during the cleaning process, the aerators and pipelines are both installed at the bottom of the aeration tank, and the aerators and pipelines will block the residues at the bottom of the tank, so it is not convenient to clean the residues at the bottom of the aeration tank. Content of the Utility Model

[0005] The purpose of the utility model is to provide an aeration device for sewage treatment, which solves the problem of inconvenient cleaning of the residues at the bottom of the aeration tank.

[0006] The described aeration device for sewage treatment includes an aeration tank, and an aeration assembly for injecting air into the sewage is arranged in the aeration tank; a cleaning assembly for cleaning the residues at the bottom of the aeration tank is arranged below the aeration assembly; a groove is formed at the edge of the bottom of the aeration tank, and a collection assembly for collecting the residues at the bottom of the aeration tank is arranged in the groove.

[0007] Furthermore, the aeration assembly includes a horizontally arranged first pipe. The first pipe has a rectangular structure and is installed on the inner sidewall of the aeration tank. A number of second pipes connected and communicating with the first pipe are arranged inside the first pipe. A number of aerators for releasing air into the sewage in the form of bubbles are installed on each second pipe. An air inlet pipe is vertically arranged in the aeration tank. One end of the air inlet pipe is connected and communicating with the first pipe, and the other end is used for connecting with an air conveying device.

[0008] Furthermore, the cleaning assembly includes a scraper. Sliding plates fixed on the inner sidewall of the aeration tank are arranged on both the front and rear sides of the scraper. Sliding grooves for the left - right sliding of the scraper are formed on the sliding plates. Both the front and rear sidewalls of the scraper are in left - right sliding fit with the sliding grooves through sliders. Two horizontally arranged rotating shafts in a left - right arrangement are provided at the top of the aeration tank. One end of each rotating shaft is rotatably connected to the top of the aeration tank through a mounting seat, and the other end of each is fixed with a servo motor installed on the top of the aeration tank. Steel wires for pulling the sliders to move left and right in the sliding grooves are arranged on both the left and right sides of the sliders. One end of each steel wire is fixed on the slider, and the other end is fixed on the adjacent rotating shaft.

[0009] Furthermore, two horizontally arranged limiting blocks are fixed at the bottom of the sliding plate. Through holes for the steel wires to pass through are formed on the limiting blocks, and the through holes communicate with each other left and right.

[0010] Furthermore, connecting plates are fixed on both the left and right sidewalls of the sliding plate, and first pulleys for the steel wires to bypass are installed at the bottom of each connecting plate.

[0011] Furthermore, two horizontally arranged fixing plates are arranged in the aeration tank. The fixing plates are both fixed at the mouth of the aeration tank, and second pulleys for the steel wires to bypass are installed at the top of each fixing plate.

[0012] Furthermore, the collection assembly includes a collection basket, and a pulling rope for pulling it out of the aeration tank is installed at the top of the collection basket.

[0013] Furthermore, water outlet pipes are installed at the bottoms of both the first pipe and the second pipes, and a water pump is installed at the top of the aeration tank. The water outlet ends of the water outlet pipes are provided with a number of nozzles with downward spray openings, and the water inlet ends of the water outlet pipes are connected and communicating with the water pump.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] By installing the aeration component on the side wall of the aeration tank, a scraper can be arranged between the aeration component and the bottom of the aeration tank. The scraper is connected to a slider, and the left and right sides of the slider are respectively connected to steel wires. The steel wires are respectively connected to rotating shafts, and the rotating shafts are respectively fixed on servo motors. Therefore, when the servo motors rotate to drive the rotating shafts to rotate, the steel wires can be driven to move. During the movement of the steel wires, the scraper can be driven to move left and right, so that the scraper can scrape the residues at the bottom of the aeration tank. The residues scraped by the scraper can finally be scraped into the collection basket, and then by taking out the collection basket from the aeration tank, it is convenient to clean the residues at the bottom of the aeration tank. Therefore, the utility model avoids the problem that it is inconvenient to clean the residues at the bottom of the aeration tank. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is Figure 1 the sectional structural diagram at A-A in

[0018] Figure 3 is Figure 1 the top view structural diagram;

[0019] Figure 4 is Figure 1 the enlarged structural diagram at B in

[0020] Names of each component in the figure: 1. Aeration tank; 2. Pulling rope; 3. First pulley; 4. Water outlet hole; 5. Collection basket; 6. Limit block; 7. Slide plate; 8. First pipeline; 9. Scraper; 10. Slider; 11. Sprinkler; 12. Connecting plate; 13. Water outlet pipe; 14. Water pump; 15. Air inlet pipe; 16. Second pulley; 17. Fixed plate; 18. Steel wire rope; 19. Rotating shaft; 20. Servo motor; 21. Mounting seat; 22. Aerator; 23. Second pipeline. Detailed Embodiment

[0021] The following further illustrates the utility model through specific embodiments with reference to the drawings, but the utility model is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the present invention.

[0022] Embodiment 1

[0023] The aeration device for sewage treatment described in this embodiment, as Figure 1 shown, includes an aeration tank 1. The aeration tank 1 is mainly composed of a tank body, a water inlet hole and a water outlet hole. The tank body is generally made of reinforced concrete; the water inlet hole of the aeration tank 1 can be the opening at its top, or a water inlet hole communicating inside and outside can be opened on the tank body of the aeration tank 1; According toFigure 1 In terms of the orientation in [description], the water outlet hole 4 is the position where water flows out; during use, sewage is injected into the aeration tank 1 through the water inlet hole. After the sewage treatment is completed, by opening the water outlet hole 4, the sewage can be discharged from the position of the water outlet hole 4.

[0024] As Figure 1 and Figure 3 shown, a first pipe 8 is horizontally arranged in the aeration tank 1. The first pipe 8 has a rectangular structure and is installed on the inner side wall of the aeration tank 1. A number of second pipes 23 connected and communicating with it are arranged in the first pipe 8. A number of aerators 22 for releasing air into the sewage in the form of bubbles are installed on each of the second pipes 23. An air inlet pipe 15 is vertically arranged in the aeration tank 1. One end of the air inlet pipe 15 is connected and communicating with the first pipe 8, and the other end is used to connect with an air conveying device. This section of the solution as a whole constitutes an aeration assembly for injecting air into the sewage. When the first pipe 8 is specifically installed, the front side wall of the first pipe 8 is fixed on the front inner side wall of the aeration tank 1, the rear side wall of the first pipe 8 is fixed on the rear inner side wall of the aeration tank 1, and there is a space for the collection basket 5 to move up and down between the left and right side walls of the first pipe 8 and the aeration tank 1. After the first pipe 8 is installed, its position is close to the bottom of the aeration tank 1. The aerator 22 is a known product. The aerator 22 in this design is a disk aerator, which is mainly used for oxygenating the water body and mainly consists of an aeration disk, a main pipe, a branch pipe, etc. Its working principle is that the surface of the aeration disk has micropores, and the micropores can generate a large number of tiny bubbles. When the air in the tiny bubbles comes into contact with the water, the oxygen content in the sewage can be increased, thereby promoting the growth and metabolism of microorganisms in the water, and thus achieving the treatment of sewage. The air conveying device can be an air compressor. The air compressor compresses the gas to increase the pressure of the gas, so as to be used for pipeline transportation of the gas. During use, first, the sewage to be treated is injected into the aeration tank 1. Then, because the first pipe 8 is connected and communicating with the second pipe 23 and the air inlet pipe 15, when the other end of the air inlet pipe 15 is connected to the air compressor, the gas can be sent into the air inlet pipe 15, then enter the second pipe 23 through the inside of the first pipe 8, and finally the air can be ejected from the aerator 22 on the second pipe 23. When the air is ejected, because the first pipe 8, the second pipe 23, and the aerator 22 are close to the bottom of the aeration tank 1, the air can flow from bottom to top, and during the flowing process, it can be mixed with the sewage in the aeration tank 1, thereby carrying out sewage treatment. The first pipe 8, the second pipe 23, and the air inlet pipe 15 can be made of materials such as steel, ABS, or PVC during production.

[0025] In the specific implementation process, the air conveying device in the aeration assembly can also be a blower.

[0026] As Figure 1, Figure 2 and Figure 3As shown in the figure, a scraper 9 is arranged below the aeration component. Slide plates 7 fixed to the inner side walls of the aeration tank 1 are arranged on both the front and rear sides of the scraper 9. A sliding groove for the left-right sliding of the scraper 9 is formed in the slide plate 7. Both the front and rear side walls of the scraper 9 are in left-right sliding fit with the sliding groove through sliders 10; two rotating shafts 19 arranged horizontally in a left-right manner are provided at the top of the aeration tank 1; one end of each rotating shaft 19 is rotatably connected to the top of the aeration tank 1 through a mounting seat 21, and a servo motor 20 installed on the top of the aeration tank 1 is fixed to the other end thereof; steel wire ropes 18 for pulling the sliders 10 to move left and right in the sliding groove are arranged on both the left and right sides of the sliders 10. One end of each steel wire rope 18 is fixed to the slider 10, and the other end is fixed to the adjacent rotating shaft 19; the overall scheme of this section constitutes a cleaning component for cleaning the residues at the bottom of the aeration tank 1; the slide plate 7 on the front side of the scraper 9 is fixed to the front inner side wall of the aeration tank 1, and the slide plate 7 on the rear side of the scraper 9 is fixed to the rear inner side wall of the aeration tank 1; sliders 10 are fixed to both the front and rear side walls of the scraper 9. The slider 10 on the front side of the scraper 9 is in left-right sliding fit with the sliding groove on the front side slide plate 7, and the slider 10 on the rear side of the scraper 9 is in left-right sliding fit with the sliding groove on the rear side slide plate 7; therefore, the scraper 9 can slide left and right between the two slide plates 7 through the sliders 10; after the scraper 9 is installed, the bottom of the scraper 9 contacts the bottom of the aeration tank 1; during the specific installation of the rotating shaft 19 and the mounting seat 21, the mounting seat 21 is fixed to the top of the aeration tank 1. A through mounting hole is formed in the mounting seat 21, and a bearing is installed in the mounting hole. The outer ring of the bearing is fixed in the mounting hole, and one end of the rotating shaft 19 is fixed to the inner ring of the bearing. Therefore, one end of the rotating shaft 19 realizes a rotating connection; because the other end of the rotating shaft 19 is installed on the servo motor 20, when the servo motor 20 rotates, the rotating shaft 19 can be driven to rotate; preferably, two steel wire ropes 18 are arranged on both the left and right sides of the slider 10. When the two steel wire ropes 18 on the left side of the slider 10 are installed, since sliders 10 are fixed to both the front and rear sides of the scraper 9, one end of one steel wire rope 18 is fixed to the left side wall of the front side slider 10, and one end of the other steel wire rope 18 is fixed to the left side wall of the rear side slider 10. The other ends of the two steel wire ropes 18 are fixed to the rotating shaft 19 from the right side direction of the left side rotating shaft 19; when the two steel wire ropes 18 on the right side of the slider 10 are installed, since sliders 10 are fixed to both the front and rear sides of the scraper 9, one end of one steel wire rope 18 is fixed to the right side wall of the front side slider 10, and one end of the other steel wire rope 18 is fixed to the right side wall of the rear side slider 10. The other ends of the two steel wire ropes 18 are fixed to the rotating shaft 19 from the left side direction of the right side rotating shaft 19; through the design of the two steel wire ropes 18, the process of the steel wire ropes 18 pulling the sliders 10 to move left and right can be more stable and easy, so as to drive the scraper 9 to move left and right more stably; the two servo motors 20 are electrically connected to the same controller, and the controller can turn on the two servo motors 20 simultaneously and rotate in the same direction; preferably, a battery for supplying power to the servo motor 20 is installed on the top of the aeration tank 1.During use, for example, when both servo motors 20 rotate forward (clockwise), they drive the two rotating shafts 19 to rotate forward. At this time, the right servo motor 20 winds the right steel wire rope 18, and the left servo motor 20 pays out the left steel wire rope 18. Therefore, the steel wire rope 18 will move to the right as a whole. At this time, since the steel wire rope 18 is connected to the slider 10 and the slider 10 is fixed to the scraper 9, the scraper 9 can be pulled to move to the right. During the process of the scraper 9 moving to the right, the bottom of the scraper 9 contacts the bottom of the aeration tank 1. Therefore, the residues at the bottom of the aeration tank 1 can be scraped to the right; similarly, when both servo motors 20 rotate in reverse (counterclockwise), the scraper 9 can be driven to move to the left, and at this time, the residues at the bottom of the aeration tank 1 can be scraped to the left. Thus, through the design of the left and right movement of the scraper 9, it is convenient to clean the residues at the bottom of the aeration tank 1. During the cleaning process, since the aeration component is located above it, the aeration component will not block the scraper 9; the scraper 9 can be made of materials such as iron, plastic, or silicone during production; the slide plate 7, the slider 10, the rotating shaft 19, and the mounting seat 21 can be made of materials such as iron, aluminum, and steel during production;

[0027] In the specific implementation process, the scraper 9 in the cleaning component can also be replaced with a brush. By moving the brush left and right, the purpose of cleaning the bottom of the aeration tank 1 can also be achieved;

[0028] Such as Figure 1 and Figure 4 As shown, two limiting blocks 6 arranged left and right are fixed to the bottom of the slide plate 7. Through holes for the steel wire rope 18 to pass through are formed in the limiting blocks 6, and the through holes communicate with each other left and right; the left limiting block 6 is preferably close to the left side wall of the slide plate 7, and the right limiting block 6 is preferably close to the right side wall of the slide plate 7; when the steel wire rope 18 passes through the through holes in the limiting blocks 6, it is convenient to limit the steel wire rope 18, so that the steel wire rope 18 can more stably pull the slider 10 to move left and right; the limiting blocks 6 can be made of materials such as iron, aluminum, and steel during production;

[0029] Such as Figure 1 and Figure 4As shown in the figure, connecting plates 12 are fixed to both the left and right side walls of the skateboard 7. First pulleys 3 around which the steel wire ropes 18 pass are installed at the bottoms of the connecting plates 12. When specifically installing the connecting plates 12, the right side wall of the left connecting plate 12 is fixed to the left side wall of the skateboard 7, and the left side wall of the right connecting plate 12 is fixed to the right side wall of the skateboard 7. During use, after the left steel wire rope 18 passes through the through hole in the left limit block 6, it comes into contact with the left first pulley 3; after the right steel wire rope 18 passes through the through hole in the right limit block 6, it comes into contact with the right first pulley 3. Therefore, through the design of the steel wire rope 18 sliding on the first pulley 3, it is convenient to pull the steel wire rope 18 for movement, and the operation is time-saving and labor-saving. The connecting plates 12 can be made of materials such as iron, aluminum, and steel during production;

[0030] As Figure 1 shown in the figure, two fixed plates 17 arranged left and right are provided in the aeration tank 1. The fixed plates 17 are both fixed at the mouth of the aeration tank 1. Second pulleys 16 around which the steel wire ropes 18 pass are installed at the tops of the fixed plates 17. The left side wall of the left fixed plate 17 is fixed to the left inner side wall of the aeration tank 1, and the right side wall of the right fixed plate 17 is fixed to the right inner side wall of the aeration tank 1. During use, after the left steel wire rope 18 passes around the bottom of the left first pulley 3, it then passes around the top of the left second pulley 16 and is fixed to the left rotating shaft 19; after the right steel wire rope 18 passes around the bottom of the right first pulley 3, it then passes around the top of the right second pulley 16 and is fixed to the right rotating shaft 19. Therefore, through the design of the steel wire rope 18 sliding on the first pulley 3 and the second pulley 16, it is even more convenient to pull the steel wire rope 18 for movement, and the operation is even more time-saving and labor-saving. The fixed plates 17 can be made of materials such as iron, aluminum, and steel during production;

[0031] As Figure 1 shown in the figure, grooves are provided at the bottom edge of the aeration tank 1. When specifically opening the grooves, grooves are provided at the bottom of the aeration tank 1 on both the left and right sides of the first pipe 8. The grooves are of rectangular structure;

[0032] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, a collection basket 5 is arranged in the groove. A pulling rope 2 for pulling it out of the aeration tank 1 is installed at the top of the collection basket 5. The overall solution of this paragraph constitutes a collection component for collecting the residues at the bottom of the aeration tank 1. Since there are two grooves on the left and right, there are also two collection baskets 5 on the left and right. After the collection basket 5 is placed in the groove, the top of the collection basket 5 and the bottom of the aeration tank 1 are on the same straight line. Because the residue at the bottom of the aeration tank 1 can be scraped left and right during the left and right movement of the scraper 9, when the scraper 9 moves to the left, the residue at the bottom of the aeration tank 1 can be scraped into the left collection basket 5, and when the scraper 9 moves to the right, the residue at the bottom of the aeration tank 1 can be scraped into the right collection basket 5. Since pulling ropes 2 are installed at the tops of the collection baskets 5, one end of the pulling rope 2 is fixed on the collection basket 5, and the other end is located outside the aeration tank 1. During use, by pulling the pulling rope 2 outside the aeration tank 1, it is convenient to pull the collection basket 5 upward, so that the collection basket 5 can be pulled out of the aeration tank 1, and then it is convenient to process the residue in the collection basket 5. During the process of pulling the collection basket 5 upward, if it is not convenient to pull manually, a winch can also be installed at the top of the aeration tank 1. The winch is connected to the pulling rope 2 on the collection basket 5. When the winch pulls the pulling rope 2 to drive the collection basket 5 to move, the collection basket 5 can be taken out of the aeration tank 1 more easily. Through the design of scraping the residue at the bottom of the aeration tank 1 by the scraper 9 and then collecting the residue by the collection basket 5, it is convenient to process the residue at the bottom of the aeration tank 1, thus avoiding the problem that it is not convenient to process the residue at the bottom of the aeration tank 1 in the prior art. A number of water leakage holes communicating inside and outside are provided on the collection basket 5, and the bottom of the groove is connected and communicated with the water outlet hole 4. When the treated water source in the aeration tank 1 needs to be discharged, the water source will pass through the collection basket 5 and be discharged from the position of the water outlet hole 4. Therefore, the collection basket 5 can not only filter the water source, but also collect the residue at the bottom of the aeration tank 1. The pulling rope 2 can also be a steel wire rope, and the collection basket 5 can be made of materials such as iron, aluminum and steel during production;

[0033] In the specific implementation process, the pulling ropes 2 in the collection component can be set to two front and back. One ends of the pulling ropes 2 are fixed on the front and back sides of the top of the collection basket 5. Through the design of the two pulling ropes 2, the collection basket 5 can be moved upward more stably.

[0034] Such as Figure 1 and Figure 3As shown, water outlet pipes 13 are installed at the bottoms of the first pipe 8 and the second pipe 23, and a water pump 14 is installed at the top of the aeration tank 1; a number of nozzles 11 with downward nozzles are installed at the water outlet ends of the water outlet pipes 13, and the water inlet ends of the water outlet pipes 13 are connected and communicated with the water pump 14; the water inlet end of the water pump 14 is connected and communicated with a water inlet pipe. During use, the water inlet pipe is placed in an external water source, such as the water in a water tank or the treated sewage. Then the water pump 14 can transport the external water source into the water outlet pipe 13, and then it can be sprayed out through the nozzles 11. Therefore, when the scraper 9 moves left and right, the nozzles 11 can spray and wash the bottom of the aeration tank 1, so as to achieve the purpose of spraying and washing while scraping, and make the bottom of the aeration tank 1 cleaner as much as possible;

[0035] In the specific use process: First, inject the sewage to be treated into the aeration tank 1, then connect the air inlet pipe 15 to the air transportation equipment, and the air enters the second pipe 23 through the air inlet pipe 15 and the first pipe 8, and then the air is sprayed into the sewage through the aerator 22, so as to increase the oxygen content in the sewage and promote the growth and metabolism of microorganisms in the water, so as to achieve the treatment of the sewage; when the treatment is completed, the water source in the aeration tank 1 is discharged through the water outlet hole 4; when the water source in the aeration tank 1 is discharged, there may be residues at the bottom of the aeration tank 1, such as sludge and garbage, etc.; at this time, turn on the two servo motors 20 at the same time to rotate in the same direction. During the rotation of the servo motor 20, the rotating shaft 19 can be driven to rotate. When the rotating shaft 19 rotates, the steel wire rope 18 pulls the slider 10 to move left and right. During the left and right movement of the slider 10, the scraper 9 can be driven to scrape left and right at the bottom of the aeration tank 1. When the scraper 9 scrapes to the left, the residues at the bottom of the aeration tank 1 can be scraped into the collection basket 5 on the left side, and when the scraper 9 scrapes to the right, the residues at the bottom of the aeration tank 1 can be scraped into the collection basket 5 on the right side; finally, by pulling the pull rope 2, the collection basket 5 can be pulled out of the aeration tank 1, and the residues in the collection basket 5 can be processed; in this use process, it is convenient to process the residues at the bottom of the aeration tank 1.

Claims

1. An aeration device for sewage treatment, comprising an aeration tank (1), characterized in that: An aeration component for injecting air into the sewage is arranged in the aeration tank (1); A cleaning component for cleaning the residues at the bottom of the aeration tank (1) is arranged below the aeration component; the cleaning component includes a scraping plate (9), and sliding plates (7) fixed on the inner side walls of the aeration tank (1) are arranged on the front and rear sides of the scraping plate (9). A sliding groove for the left and right sliding of the scraping plate (9) is formed in the sliding plate (7). The front and rear side walls of the scraping plate (9) are in left and right sliding fit with the sliding groove through sliders (10); two rotating shafts (19) arranged horizontally from left to right are arranged at the top of the aeration tank (1); one ends of the rotating shafts (19) are rotatably connected to the top of the aeration tank (1) through mounting seats (21), and the other ends of the rotating shafts are fixed with servo motors (20) mounted on the top of the aeration tank (1); steel wires (18) for pulling the sliders (10) to move left and right in the sliding groove are arranged on the left and right sides of the sliders (10). One ends of the steel wires (18) are fixed on the sliders (10), and the other ends of the steel wires are fixed on the adjacent rotating shafts (19); A groove is formed at the bottom edge of the aeration tank (1), and a collecting component for collecting the residues at the bottom of the aeration tank (1) is arranged in the groove.

2. The aeration device for sewage treatment according to claim 1, characterized in that: The aeration component includes a horizontally arranged first pipeline (8), the first pipeline (8) has a rectangular structure, and the first pipeline (8) is installed on the inner side wall of the aeration tank (1); a plurality of second pipelines (23) connected and communicated with the first pipeline (8) are arranged in the first pipeline (8), and a plurality of aerators (22) for releasing air into the sewage in the form of bubbles are installed on the second pipelines (23); an air inlet pipe (15) is vertically arranged in the aeration tank (1); one end of the air inlet pipe (15) is connected and communicated with the first pipeline (8), and the other end of the air inlet pipe is used for connecting with an air conveying device.

3. The aeration device for sewage treatment according to claim 1, characterized in that: Two limiting blocks (6) arranged horizontally from left to right are fixed at the bottom of the sliding plate (7), and through holes for the steel wires (18) to pass through are formed in the limiting blocks (6), and the through holes are communicated left and right.

4. The aeration device for sewage treatment according to claim 3, characterized in that: Connecting plates (12) are fixed on the left and right side walls of the sliding plate (7), and first pulleys (3) for the steel wires (18) to bypass are installed at the bottoms of the connecting plates (12).

5. The aeration device for sewage treatment according to claim 4, characterized in that: Two fixing plates (17) arranged horizontally from left to right are arranged in the aeration tank (1), the fixing plates (17) are fixed at the tank mouth of the aeration tank (1), and second pulleys (16) for the steel wires (18) to bypass are installed at the tops of the fixing plates (17).

6. The aeration device for sewage treatment according to claim 1, characterized in that: The collecting component includes a collecting basket (5), and a pulling rope (2) for pulling the collecting basket (5) out of the aeration tank (1) is installed at the top of the collecting basket (5).

7. The aeration device for sewage treatment according to claim 2, characterized in that: Water outlet pipes (13) are installed at the bottoms of the first pipeline (8) and the second pipelines (23), and a water pump (14) is installed at the top of the aeration tank (1); a plurality of spray nozzles (11) with downward spray openings are installed at the water outlet ends of the water outlet pipes (13), and the water inlet ends of the water outlet pipes (13) are connected and communicated with the water pump (14).

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