Shallow aeration aerobic tank

Abstract

The utility model discloses a shallow aeration aerobic tank, which relates to the technical field of sewage treatment and comprises an aerobic tank body which is of a hollow cylinder structure with a sealed bottom end and an open top end, and a water inlet pipe and a water outlet pipe which are communicated with an inner cavity of the aerobic tank body are arranged on the side wall of the upper part of the aerobic tank body; the air main pipe is arranged at the upper part of the top end opening of the aerobic tank body in parallel and extends along the radial direction of the aerobic tank body by taking the center of the aerobic tank body as a midpoint, and an oxygen supply pipeline for supplying oxygen to the interior of the aerobic tank body is arranged on the outer wall of the air main pipe. According to the utility model, air blast aeration is adopted, the aeration depth is shallow aeration at the middle upper part of the tank body of the aerobic tank, and the aeration depth is shallower than that of conventional aeration, so that the pressure of a fan can be lower, and the energy consumption is low; at least one mechanical stirrer is installed in the aerobic tank body and used for preventing sludge on the lower portion of the aeration head of the aerobic tank from settling to the tank bottom and dispersing and evenly dissolving oxygen, the stirring contact area is enlarged through the mechanical stirring device, and stirring is even and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a shallow aeration aerobic pool. Background Art

[0002] Among the many links in sewage treatment, aerobic tanks play a vital role. Traditional aerobic tanks generally use conventional aeration methods, which covers the entire aerobic tank area with a relatively deep aeration depth.

[0003] However, this aeration method brings many disadvantages:

[0004] 1. Conventional aeration requires a higher fan pressure to achieve aeration of the entire aerobic tank. This means that during operation, the fan needs to consume a lot of energy to maintain this deep aeration, increasing the cost of sewage treatment;

[0005] 2. The sludge under the aeration head is very easy to settle to the bottom of the pool. This is because under this aeration method, the water flow dynamics at the bottom are relatively weak and cannot effectively prevent the sludge from sinking. The uneven distribution of sludge directly affects the treatment effect of the aerobic pool. Excessive sludge accumulation in some areas may cause local hypoxia, affecting the normal metabolic activities of microorganisms, thereby reducing the ability to decompose organic matter in sewage. It is difficult to ensure that the aerobic pool as a whole has sufficient dissolved oxygen and stable sludge content, which greatly affects the growth and metabolic activities of microorganisms in the aerobic pool, and thus affects the sewage treatment effect.

[0006] In view of this, this application is hereby filed. Utility Model Content

[0007] The purpose of the utility model is to provide a shallow aeration aerobic tank to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the utility model provides a shallow aeration aerobic tank, comprising

[0009] The aerobic tank body is a hollow cylindrical structure with a sealed bottom and an open top, and a water inlet pipe and a water outlet pipe communicating with the inner cavity are provided on the side wall of the upper part;

[0010] The air main pipe is arranged in parallel on the upper part of the top port of the aerobic tank body and extends radially along the aerobic tank body with the center of the aerobic tank body as the midpoint. The outer wall of the air main pipe is provided with an oxygen supply pipeline for supplying oxygen to the inside of the aerobic tank body.

[0011] A mechanical agitator is installed inside the aerobic tank body and is located below the air main pipe.

[0012] Furthermore, the oxygen supply pipeline includes

[0013] A plurality of air branches, which are in a circular tube structure and are connected to the main air pipe, and the air branches extend vertically downward from the outer wall of the main air pipe;

[0014] The aeration head is connected to the bottom end of the air branch pipe and communicates with the air branch pipe.

[0015] Furthermore, the aeration head is arranged in parallel with the air main pipe, and an air outlet is opened on the outer wall of the aeration head, and a plurality of the air outlets are provided.

[0016] Furthermore, the aeration head is composed of two long straight tubes arranged in parallel and a short straight tube connected between the two long straight tubes, and the long straight tubes and the short straight tubes form an H-shaped aeration head.

[0017] Furthermore, the air main pipe is a hollow circular tube structure with one end blocked and the other end open. The open end of the air main pipe is connected to a blower, which is fixed on the outer wall of the aerobic tank body.

[0018] Furthermore, the aeration head outlet is no more than 6m away from the pool surface, and the aeration head is no less than 0.5m away from the pool bottom.

[0019] Furthermore, a plurality of mechanical agitators are provided, and the plurality of mechanical agitators are arranged in an interval-distributed manner inside the aerobic tank body.

[0020] Furthermore, it also includes a traction mechanism arranged on the aerobic tank body, the traction mechanism includes a bracket installed at the top port of the aerobic tank body, a traction rope is provided on the bracket, and a winch for winding the traction rope is also provided on the bracket, one end of the traction rope is connected to the winch, and the other end of the traction rope is connected to the mechanical stirrer.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The device adopts air blast aeration, and the aeration depth is shallow aeration in the middle and upper part of the aerobic tank body. The aeration depth is shallower than that of conventional aeration, so the fan pressure can be relatively low and the energy consumption is low. At least one mechanical agitator is installed in the aerobic tank body to prevent the sludge below the aeration head of the aerobic tank from settling to the bottom of the tank and at the same time disperse the dissolved oxygen evenly. The stirring contact area is expanded by this mechanical stirring device, and the stirring is uniform and stable; the efficiency of shallow aeration is improved, ensuring that the aerobic tank body as a whole has sufficient dissolved oxygen and stable sludge content. It has the characteristics of high aeration efficiency, stable shallow aeration, low operating cost, flexible operation, saving aerobic tank construction cost, etc., and is particularly suitable for aerobic biological treatment of medium and large water volume wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the principle structure of the utility model;

[0024] Figure 2 This is a structural diagram of the air main in the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the air branch pipe in the utility model;

[0026] Figure 4 It is a structural schematic diagram of the aeration head in the utility model.

[0027] In the figure: 1. Aerobic tank body; 2. Water inlet pipe; 3. Water outlet pipe; 4. Air main pipe; 5. Aeration head; 6. Air branch pipe; 7. Mechanical agitator. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-4 The utility model provides a technical solution: a shallow aeration aerobic pool, including

[0030] The aerobic tank body 1 is a hollow cylindrical structure with a sealed bottom and an open top. An inlet pipe 2 and an outlet pipe 3 communicating with the inner cavity of the aerobic tank body are provided on the side wall of the upper portion.

[0031] The air main pipe 4 is arranged in parallel on the upper part of the top port of the aerobic tank body 1 and extends radially along the aerobic tank body 1 with the center of the aerobic tank body 1 as the midpoint, and its outer wall is provided with an oxygen supply pipeline for supplying oxygen to the interior of the aerobic tank body 1;

[0032] The mechanical agitator 7 is installed inside the aerobic tank body 1 and is located below the air main pipe 4.

[0033] Specifically, the device adopts air to be connected with the air main pipe 4, and the outside air can be blown into the aerobic tank body 1 through the air main pipe 4 for aeration. Since the air main pipe 4 is located at the upper part of the aerobic tank body 1, the aeration depth is shallow in the upper middle part of the aerobic tank body 1, which is shallower than conventional aeration. In this way, the fan pressure can be relatively low and the energy consumption is low.

[0034] At least one mechanical agitator 7 is installed in the aerobic tank body 1 to prevent the sludge below the aeration head 5 of the aerobic tank from settling to the bottom of the tank and at the same time disperse the dissolved oxygen evenly. The mechanical agitator device expands the stirring contact area, and the stirring is uniform and stable; the efficiency of shallow aeration is improved, ensuring that the aerobic tank body 1 as a whole has sufficient dissolved oxygen and a stable sludge content. It has the characteristics of high aeration efficiency, stable shallow aeration, low operating cost, flexible operation, and saving of aerobic tank construction cost, and is particularly suitable for aerobic biological treatment of medium and large water volume wastewater.

[0035] See Figure 1 and Figure 2 , oxygen supply pipeline includes

[0036] A plurality of air branch pipes 6 are in a circular tube structure and are connected to the main air pipe 4. The air branch pipes 6 extend vertically downward from the outer wall of the main air pipe 4.

[0037] The aeration head 5 is connected to the bottom end of the air branch pipe 6 and communicates with the air branch pipe 6.

[0038] Specifically, air can be evenly injected into the interior of the aerobic tank body 1 through the provided air branch pipe 6 and the aeration head 5 .

[0039] It should be noted that the number of air branches 6 in this application is four, and more air branches 6 can be installed according to the length of the air main pipe 4 or the required air injection volume.

[0040] It should be noted that the mechanical stirrer 7 is mainly composed of a stirring shaft, stirring blades and a driving motor.

[0041] Stirring shaft: Made of high-strength and corrosion-resistant material, it is installed vertically in the aerobic tank body 1. The length of the stirring shaft is adjusted according to the depth of the aerobic tank to ensure that it can cover the area below the aeration head.

[0042] Mixing blades: Mixing blades are evenly distributed on the mixing shaft. Their number and shape can be designed based on actual needs. The shapes of the mixing blades can be spiral or paddle-shaped to increase the mixing contact area. The material of the mixing blades must also be corrosion-resistant to adapt to the working environment of the aerobic tank.

[0043] Drive Motor: Installed inside the aerobic tank body 1, the exterior of the aerobic tank is enclosed in a sealed housing that isolates it from external moisture. The drive motor is located within the sealed housing and connected to the agitator shaft via a coupling, providing power to the agitator shaft. The power and speed of the drive motor can be selected based on the size of the aerobic tank and the agitation requirements.

[0044] In order to further improve the performance of the mechanical stirrer 7, it is also equipped with:

[0045] Flow guide: It is installed on the outside of the mixing blades and is cylindrical in shape. The flow guide can guide the flow of water to make the mixing more uniform. It can also prevent the vortex generated during the mixing process from affecting other equipment in the aerobic tank body 1.

[0046] Speed regulating device: connected between the driving motor and the stirring shaft, it can adjust the speed of the stirring shaft according to parameters such as sludge concentration and dissolved oxygen content in the aerobic tank to achieve the best stirring effect.

[0047] When the mechanical agitator 7 is operating, the drive motor rotates the agitator shaft, which in turn rotates the agitator blades. The water flow generated by the rotating agitator blades prevents sludge below the aeration head 5 from settling to the tank bottom, while also evenly dispersing dissolved oxygen within the aerobic tank body 1. The flow deflector guides the water flow for more uniform agitation. The speed control device adjusts the agitator shaft speed based on the actual conditions within the aerobic tank to meet varying agitation requirements.

[0048] The structural design of the mechanical stirring device can effectively prevent the sludge below the aeration head 5 provided in the aerobic tank body 1 from settling to the bottom of the tank, while dispersing the dissolved oxygen evenly, improving the efficiency of shallow aeration, and ensuring that the aerobic tank as a whole has sufficient dissolved oxygen and a stable sludge content.

[0049] Reference Figure 3 and Figure 4 The aeration head 5 is arranged in parallel with the air main pipe 4, and an air outlet is opened on the outer wall of the aeration head 5, and a plurality of air outlets are provided.

[0050] Specifically, the gas can be uniformly injected into the aerobic tank body 1 through the provided aeration head 5 .

[0051] It should be noted that the number of air outlet holes on the outer wall of the aeration head 5 in the present application is 15 to 20, and more air outlet holes can be opened according to the length of the aeration head 5.

[0052] Reference Figure 4 The aeration head 5 is composed of two long straight pipes arranged in parallel and a short straight pipe connected between the two long straight pipes. The long straight pipe and the short straight pipe form an H-shaped aeration head 5.

[0053] The air main pipe 4 is a hollow circular tube structure with one end blocked and the other end open. The open end of the air main pipe 4 is connected to a blower fixed on the outer wall of the aerobic tank body 1.

[0054] The outlet of aeration head 5 is no more than 6m away from the pool surface, and the outlet of aeration head 5 is no less than 0.5m away from the pool bottom.

[0055] There are multiple mechanical stirrers 7 , which are arranged inside the aerobic tank body 1 at intervals.

[0056] Specifically, the number of mechanical agitators 7 should be no less than one, and multiple agitators may be installed, depending on the actual sewage treatment volume.

[0057] It also includes a traction mechanism arranged on the aerobic tank body 1, which includes a bracket installed at the top port of the aerobic tank body 1, a traction rope is provided on the bracket, and a winch for winding the traction rope is also provided on the bracket. One end of the traction rope is connected to the winch, and the other end of the traction rope is connected to the mechanical agitator 7.

[0058] Specifically, the traction mechanism plays an important role in the operation of the shallow aerated aerobic tank body 1. The bracket installed at the top end of the aerobic tank body 1 provides stable support for the entire traction mechanism. The bracket is provided with a traction rope and a winch for winding the traction rope.

[0059] When the position of the mechanical stirrer 7 needs to be adjusted or maintained, the winch is started and begins to reel in or release the traction rope. When the winch reels in the traction rope, one end of the traction rope is connected to the winch, and the other end pulls the mechanical stirrer 7 upward. Conversely, when the winch releases the traction rope, the mechanical stirrer 7 moves downward under its own weight or with appropriate auxiliary force.

[0060] By retracting and extending the traction rope with a winch, the position height of the mechanical agitator 7 in the aerobic tank body 1 can be accurately controlled to meet different work needs and maintenance requirements.

[0061] Flexible position adjustment: The traction mechanism can flexibly adjust the position of the mechanical agitator 7 according to the actual situation in the aerobic tank body 1. For example, in areas with different sludge concentrations or areas that require focused stirring, the mechanical agitator 7 can be adjusted to a suitable position to improve the stirring effect and aeration efficiency.

[0062] Easy maintenance and overhaul: When the mechanical agitator 7 needs to be maintained or overhauled, it can be easily lifted to the top of the aerobic tank body 1 by the winch, making it convenient for the staff to operate. This reduces the difficulty and time of maintenance and overhaul and improves the maintainability of the equipment.

[0063] Improve equipment adaptability: The position of the mechanical agitator 7 can be adjusted at any time according to different sewage treatment requirements and the operating status of the aerobic tank, so that the equipment can better adapt to various complex working environments, thereby improving the adaptability and reliability of the equipment.

[0064] Working principle: The device adopts air blast aeration, and the aeration depth is shallow aeration in the middle and upper part of the aerobic tank body 1. The aeration depth is shallower than that of conventional aeration, so the fan pressure can be relatively low and the energy consumption is low. At least one mechanical agitator 7 is installed in the aerobic tank body 1 to prevent the sludge below the aeration head 5 of the aerobic tank from settling to the bottom of the tank while dispersing the dissolved oxygen evenly. The stirring contact area is expanded by this mechanical stirring device, and the stirring is uniform and stable; the efficiency of shallow aeration is improved, ensuring that the aerobic tank body 1 as a whole has sufficient dissolved oxygen and stable sludge content. It has the characteristics of high aeration efficiency, stable shallow aeration, low operating cost, flexible operation, saving aerobic tank construction cost, etc., and is particularly suitable for aerobic biological treatment of medium and large water volume wastewater.

[0065] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A shallow aerated aerobic tank, characterized in that: include: The aerobic tank body (1) is a hollow cylindrical structure with a sealed bottom and an open top, and a water inlet pipe (2) and a water outlet pipe (3) communicating with the inner cavity of the aerobic tank body are provided on the side wall of the upper part; The air main pipe (4) is arranged in parallel at the upper portion of the top end port of the aerobic tank body (1), and extends radially along the aerobic tank body (1) with the center of the aerobic tank body (1) as the midpoint, and an oxygen supply pipe for supplying oxygen to the interior of the aerobic tank body (1) is provided on its outer wall; A mechanical stirrer (7) is installed inside the aerobic tank body (1) and is located below the air main pipe (4).

2. A shallow aerated aerobic pond according to claim 1, characterized in that: The oxygen supply pipeline comprises: a plurality of air branches (6) in a circular tube structure and connected to the air main pipe (4), wherein the air branches (6) extend vertically downward from the outer wall of the air main pipe (4); The aeration head (5) is connected to the bottom end of the air branch pipe (6) and communicates with the air branch pipe (6).

3. A shallow aerated aerobic pond according to claim 2, characterized in that: The aeration head (5) is arranged in parallel with the air main pipe (4), and an air outlet hole is opened on the outer wall of the aeration head (5), and a plurality of the air outlet holes are provided.

4. A shallow aerated aerobic pond as claimed in claim 3, characterized in that: The aeration head (5) is composed of two long straight pipes arranged in parallel and a short straight pipe connected between the two long straight pipes, and the long straight pipes and the short straight pipes form an H-shaped aeration head (5).

5. A shallow aerated aerobic pond as claimed in claim 2, characterized in that: The air main pipe (4) is a hollow circular tube structure with one end blocked and the other end open. The open end of the air main pipe (4) is connected to a blower, which is fixed on the outer wall of the aerobic tank body (1).

6. A shallow aerated aerobic pond according to claim 4, characterized in that: The distance between the outlet of the aeration head (5) and the pool surface is no more than 6 m, and the distance between the outlet of the aeration head (5) and the pool bottom is no less than 0.5 m.

7. A shallow aerated aerobic pond according to claim 1, characterized in that: A plurality of mechanical stirrers (7) are provided, and the plurality of mechanical stirrers (7) are arranged in an interval-distributed manner inside the aerobic tank body (1).

8. A shallow aerated aerobic pond according to claim 1, characterized in that: The invention also includes a traction mechanism arranged on the aerobic tank body (1), the traction mechanism including a bracket installed at the top end port of the aerobic tank body (1), a traction rope being arranged on the bracket, and a hoist for winding the traction rope being arranged on the bracket, one end of the traction rope being connected to the hoist, and the other end of the traction rope being connected to the mechanical stirrer (7).

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