Aeration device for sewage treatment

Abstract

The application discloses a sewage treatment aeration device, and belongs to the technical field of sewage treatment. The aeration device comprises a tank body, a tank cover, a driving element, a rotating shaft, a sealing assembly, a gas supply assembly and a plurality of aeration assemblies. The driving element is arranged on the tank cover, the rotating shaft extends into the tank body and is in transmission connection with the driving element, a gas conveying channel is formed in the rotating shaft, a plurality of aeration assemblies are arranged on the rotating shaft, gas outlet pipes are arranged on the aeration assemblies, and end covers are arranged on the gas outlet pipes. The rotating shaft is in communication with the gas supply assembly, and the gas supply assembly is in communication with an external gas source. The plurality of aeration assemblies can stir the sewage in the tank body at multiple points, so that dissolved oxygen can uniformly diffuse to each region in the tank body, thereby improving the oxygen utilization rate and the decomposition efficiency of microorganisms on organic matters. The end covers can close the gas outlet pipes, thereby preventing the sewage from flowing back into the gas outlet pipes, significantly reducing the system maintenance requirement, and improving the practicality and long-term operation stability.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an aeration device for wastewater treatment. Background Technology

[0002] Aeration refers to the process of forcibly transferring oxygen from the air into a liquid, with the aim of obtaining sufficient dissolved oxygen. In addition, aeration also prevents suspended matter in the tank from settling and enhances the contact between organic matter, microorganisms, and dissolved oxygen. This ensures that microorganisms in the tank can effectively oxidize and decompose organic matter in the wastewater under conditions of sufficient dissolved oxygen.

[0003] The applicant disclosed a wastewater treatment aeration tank in patent publication number CN212640212U. Its structure includes a base, a tank body, an inlet, and a drain outlet. The base is welded to the tank body, the inlet is embedded in the surface of the tank body, and the drain outlet is embedded in the tank body. The tank body interior includes an outer shell, a movable door, a retaining post, a filter screen, a filter screen cleaning connector, an aeration pipe, and a biological treatment layer. The outer shell and retaining post are movably engaged, the retaining post is embedded in the movable door, the aeration pipe is embedded in the outer shell, and the biological treatment layer is installed inside the outer shell. The aeration pipe and the biological treatment layer are fitted with a gap. This utility model's filter screen cleaning connector can effectively fix the filter screen under normal conditions, preventing it from sliding. After debris accumulates on the filter screen, it can be manually rotated for cleaning to prevent clogging. If cleaning is impossible, the filter screen can be popped out with a single click using the movable door, eliminating the tedious process of opening the aeration tank and replacing the filter screen, making operation faster and more convenient.

[0004] As can be seen from the patent above, although this type of sewage treatment aeration tank can clean the filter screen and prevent it from clogging, and can pop the filter screen out with one click through the movable door, making the operation faster and more convenient, the applicant found after long-term use that the bubbles generated by the aeration pipe are usually concentrated in local areas (such as the bottom of the tank or around the aeration pipe), making it difficult for oxygen to diffuse evenly throughout the tank. This results in some areas having excessive dissolved oxygen or other areas (especially corners or upper layers far from the aeration pipe) having insufficient dissolved oxygen, thereby reducing the efficiency of microorganisms in decomposing organic matter. At the same time, since the aeration pipe is located below the biological treatment layer, suspended solids in the sewage (such as organic matter and microbial flocs) tend to settle at the bottom of the tank, making the aeration pipe prone to clogging and requiring frequent cleaning and maintenance. Utility Model Content

[0005] The main purpose of this utility model is to provide an aeration device for sewage treatment, which aims to solve the problems of existing sewage treatment aeration tanks reducing the decomposition efficiency of microorganisms on organic matter, and aeration pipes being prone to blockage and requiring frequent cleaning and maintenance.

[0006] To achieve the above objectives, this utility model provides an aeration device for wastewater treatment, including a tank and a tank cover, and further including a drive component, a rotating shaft, a sealing assembly, an air supply assembly, and several aeration components. The drive component is disposed on the tank cover, and the rotating shaft extends into the tank and is drivenly connected to the drive component. An air supply channel is formed inside the rotating shaft, and several aeration components communicating with the air supply channel are spaced apart on the rotating shaft. Each of the several aeration components is provided with an air outlet pipe, and an end cap is movably disposed on the air outlet pipe. The rotating shaft is connected to the air supply assembly through the sealing assembly, and the air supply assembly is connected to an external air source and is used to supply oxygen to the several aeration components.

[0007] Preferably, a plurality of aeration components are evenly and spaced apart along the extension direction of the rotating shaft, and each of the plurality of aeration components includes a plurality of aeration pipes, which are evenly and spaced apart along the circumference of the rotating shaft and communicate with the air supply channel.

[0008] Preferably, each of the aeration pipes is in the shape of a spiral blade, and each of the aeration pipes is provided with a plurality of air outlet pipes evenly and at intervals along its respective extension direction.

[0009] Preferably, each of the several air outlet pipes is provided with an elastic element and connected to an end cap through the elastic element. The end cap is sleeved on the air outlet pipe, and a number of air holes are opened on the outer wall of the end cap.

[0010] Preferably, the gas supply assembly includes a gas delivery pipe, a valve, and an air inlet pipe. One end of the gas delivery pipe is detachably connected to the sealing assembly, and the other end of the gas delivery pipe extends out of the tank body and is connected to the valve. The valve is provided with the air inlet pipe connected to an external gas source.

[0011] Preferably, the tank also includes a base, the tank body is detachably mounted on the base, a drain outlet is provided on the bottom surface of the tank body, and a cover is detachably mounted on the drain outlet.

[0012] Beneficial effects: 1. The aeration device for sewage treatment of this utility model can agitate the sewage in the tank at multiple points through several aeration components during use, thereby allowing dissolved oxygen to be evenly diffused to various areas inside the tank, thus significantly improving oxygen utilization and the decomposition efficiency of organic matter by microorganisms, and is reliable in use.

[0013] 2. In the aeration device for sewage treatment of this utility model, when sewage does not need to be aerated, the end cap naturally seals the air outlet pipe under the action of water pressure inside the tank, thereby preventing sewage from flowing back into the air outlet pipe and effectively avoiding impurities in the sewage from clogging the air outlet pipe, several aeration components or air delivery channels, thus significantly reducing the system maintenance requirements and improving practicality and long-term operational stability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an aeration device for sewage treatment according to an embodiment of the present invention from a first-view perspective. Figure 2 A top view of an aeration device for sewage treatment according to an embodiment of this utility model; Figure 3 yes Figure 2 Cross-sectional view at point AA; Figure 4 This is a partial structural schematic diagram of an aeration device for sewage treatment according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the rotating shaft and several aeration components in an aeration device for sewage treatment according to an embodiment of the present invention.

[0016] In the diagram: 1-Drive component; 2-Rotating shaft; 3-Sealing assembly; 4-Air supply assembly; 5-Aeration assembly; 6-Air delivery channel; 7-Air outlet pipe; 8-End cap; 9-Aeration pipe; 10-Elastic component; 11-Air hole; 12-Air delivery pipe; 13-Valve; 14-Air inlet pipe; 15-Base; 16-Drain outlet; 17-Cover plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Example 1: This utility model proposes an aeration device for sewage treatment.

[0024] In one embodiment of this utility model, an aeration device for sewage treatment includes a tank and a tank cover, and also includes a drive component 1, a rotating shaft 2, a sealing component 3, an air supply component 4, and a plurality of aeration components 5. The drive component 1 is disposed on the tank cover, the rotating shaft 2 extends into the tank and is connected to the drive component 1 for transmission, an air supply channel 6 is formed inside the rotating shaft 2, and a plurality of aeration components 5 communicating with the air supply channel 6 are disposed at intervals on the rotating shaft 2, and an air outlet pipe 7 is disposed on each of the plurality of aeration components 5, and an end cap 8 is movably disposed on the air outlet pipe 7; the rotating shaft 2 is connected to the air supply component 4 through the sealing component 3, and the air supply component 4 is connected to an external air source and is used to supply oxygen to the plurality of aeration components 5.

[0025] Specifically, such as Figures 1 to 5 As shown, in this utility model of an aeration device for sewage treatment, the tank body and the tank cover can be installed by threaded connection. The operator can open or close the inner cavity of the tank body by disassembling and assembling the tank cover, thereby providing a stable working environment for sewage aeration treatment and preventing external debris from entering the tank body. At the same time, the tank body is equipped with an inlet pipe and an outlet pipe (which can be flanged connection) that are connected to the external sewage system, thereby enabling sewage to be automatically transported into the tank body and automatically transported to the next process after aeration treatment. The structural design is simple and reasonable.

[0026] Furthermore, since the driving component 1 is mounted on the tank cover, and the rotating shaft 2 extends into the tank body and is connected to the driving component 1 for transmission, the driving component 1 can be a motor as in the prior art. One end of the rotating shaft 2 can be detachably connected to the power output end of the driving component 1 by means of bolt connection or other methods, thereby enabling the driving component 1 to drive the rotating shaft 2 to rotate relative to the tank body. Understandably, in the use of the aeration device for sewage treatment of this utility model, since an air conveying channel 6 is formed inside the rotating shaft 2, and several aeration components 5 connected to the air conveying channel 6 are arranged at intervals on the rotating shaft 2, and the rotating shaft 2 can also be connected to the air supply component 4 through the sealing component 3, and the air supply component 4 is connected to an external air source, thereby enabling the air supply component 4 to deliver oxygen to the several aeration components 5 through the air conveying channel 6 inside the rotating shaft 2. When oxygen enters several aeration components 5, the end cap 8, which is movably installed on the air outlet pipe 7 (e.g., by a sliding snap-fit ​​installation method), opens under the impact of the airflow, allowing oxygen to be input into the tank through the air outlet pipe 7 and mixed with the sewage, thereby achieving aeration treatment of the sewage.

[0027] In addition, when the sewage does not need to be aerated, the external air source is turned off, the air supply component 4 stops supplying oxygen to the aeration components 5, and the end cap 8 naturally seals the air outlet pipe 7 under the action of the water pressure inside the tank. This prevents sewage from flowing back into the air outlet pipe 7 and effectively avoids impurities in the sewage from clogging the air outlet pipe 7, the aeration components 5, or the air supply channel 6. This significantly reduces the system maintenance requirements and improves practicality and long-term operational stability.

[0028] It is worth noting that, during the use of this wastewater treatment aeration device, since several aeration components 5 are spaced apart on the rotating shaft 2, when the driving component 1 drives the rotating shaft 2 to rotate, it can synchronously drive several aeration components 5 to rotate. Thus, the wastewater in the tank can be stirred at multiple points through several aeration components 5, thereby allowing dissolved oxygen to be evenly diffused to all areas inside the tank (including corners far from the external air source and the upper water layer), which significantly improves the oxygen utilization rate and the decomposition efficiency of microorganisms on organic matter, making it reliable in use.

[0029] It should be noted that the sealing component 3 can be a mature and conventional rotary seal in the existing technology, which can ensure the high sealing performance of the connection between the air supply channel 6 and the external air supply component 4 during the continuous rotation of the rotating shaft 2, effectively prevent oxygen leakage, and ensure a stable supply of aeration pressure.

[0030] In one embodiment, a plurality of aeration components 5 are uniformly and spaced apart along the extending direction of the rotating shaft 2. Each aeration component 5 includes a plurality of aeration pipes 9, which are uniformly and spaced apart along the circumference of the rotating shaft 2 and communicate with the air supply channel 6. Specifically, as shown... Figures 3 to 5 As shown, by evenly spacing several aeration components 5 along the extension direction of the rotating shaft 2, and evenly distributing several aeration pipes 9 in each aeration component 5 along the circumference of the rotating shaft 2, the diffusion coverage area of ​​oxygen and the contact efficiency of sewage can be increased, and the dead angle of oxygen distribution can be reduced. At the same time, the multi-layer aeration pipe 9 layout structure in the circumference and axial directions can form multi-point mixing and stirring of sewage in the tank, thereby improving the diffusion efficiency of oxygen and the reaction rate of microorganisms, making it highly efficient and reliable.

[0031] In one embodiment, the plurality of aeration pipes 9 are all in the shape of spiral blades, and the plurality of aeration pipes 9 are evenly and spaced apart along their respective extending directions by a plurality of air outlet pipes 7. Specifically, as shown in the figure... Figure 5 As shown, by making several aeration pipes 9 into spiral blades, they can form a continuous fluid dynamic effect of pushing the flow to the surrounding area during rotation, thereby achieving efficient oxygen transfer and further improving oxygen diffusion efficiency. At the same time, several outlet pipes 7 can achieve multi-point oxygen output from a single aeration pipe 9, thereby significantly expanding the oxygen diffusion coverage area and further reducing oxygen distribution dead zones. The structural design is simple and reasonable.

[0032] In one embodiment, each of the plurality of vent pipes 7 is provided with an elastic element 10 and connected to an end cap 8 through the elastic element 10. The end cap 8 is fitted onto the vent pipe 7, and a plurality of air holes 11 are formed on the outer wall of the end cap 8. Specifically, as shown in the figure... Figures 3 to 5As shown, when the airflow is delivered into the outlet pipe 7, the end cap 8 moves away from the outlet pipe 7 under the action of the airflow. Since an elastic element 10 is connected to the end cap 8, which can be a spring (as is available in the prior art), the spring is in a stretched state, thus preventing the end cap 8 from falling off the outlet pipe 7. Furthermore, the several air holes 11 on the outer wall of the end cap 8 are misaligned with the pipe wall of the outlet pipe 7, allowing airflow to be output through the air holes 11, thereby achieving aeration treatment of wastewater. Further, when the external air source stops supplying oxygen, the spring, under its own restoring force, moves the end cap 8 towards the outlet pipe 7 until it abuts against the end face of the outlet pipe 7. The pipe wall of the outlet pipe 7 blocks the air holes 11, effectively preventing wastewater or impurities from entering the outlet pipe 7 and causing blockage. This significantly improves the reliability, ease of maintenance, and long-term operational stability of the wastewater treatment aeration device of this invention.

[0033] In one embodiment, the gas supply assembly 4 includes a gas delivery pipe 12, a valve 13, and an air inlet pipe 14. One end of the gas delivery pipe 12 is detachably connected to the sealing assembly 3, and the other end of the gas delivery pipe 12 extends out of the tank body and is connected to the valve 13. The valve 13 is provided with an air inlet pipe 14 connected to an external gas source. Specifically, as shown... Figure 3 and Figure 4 As shown, the gas supply pipe 12 and the sealing assembly 3 can be connected by threads, which facilitates the disassembly and replacement of the gas supply pipe 12 or the sealing assembly 3, making maintenance easier. Furthermore, the gas supply pipe 12 can stably deliver oxygen to the gas supply channel 6 of the rotating shaft 2, and the end of the gas supply pipe 12 away from the sealing assembly 3 extends to the outside of the tank and connects to the valve 13, allowing the operator to quickly and easily control the supply and stop of oxygen, making operation simple and convenient.

[0034] In one embodiment, a base 15 is also included, and the tank is detachably mounted on the base 15. A drain port 16 is provided on the bottom surface of the tank, and a cover plate 17 is detachably mounted on the drain port 16. Specifically, as shown... Figure 3 As shown, the aeration device for sewage treatment of this utility model can be mounted on the base 15 by means of threaded connection or other methods during use, which can significantly improve the placement stability of the tank. Furthermore, by opening a drain port 16 with a removable cover 17 at the bottom of the tank, the staff can periodically open the cover 17 to efficiently and conveniently discharge the sludge deposited in the tank, and facilitate the maintenance or replacement of the sealing components 3 and air pipes, thereby improving the convenience of cleaning and maintenance.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An aeration device for wastewater treatment, comprising a tank and a tank cover, characterized in that, It also includes a drive unit (1), a rotating shaft (2), a sealing assembly (3), an air supply assembly (4), and several aeration assemblies (5). The drive unit (1) is disposed on the tank cover. The rotating shaft (2) extends into the tank body and is connected to the drive unit (1) in a transmission connection. An air supply channel (6) is formed inside the rotating shaft (2). Several aeration assemblies (5) communicating with the air supply channel (6) are arranged at intervals on the rotating shaft (2). Each of the several aeration assemblies (5) is provided with an air outlet pipe (7). An end cap (8) is movably disposed on the air outlet pipe (7). The rotating shaft (2) is connected to the air supply assembly (4) through the sealing assembly (3). The air supply assembly (4) is connected to an external air source and is used to supply oxygen to the several aeration assemblies (5).

2. The aeration device for wastewater treatment according to claim 1, characterized in that, A plurality of aeration components (5) are evenly and spaced apart along the extension direction of the rotating shaft (2), and each of the plurality of aeration components (5) includes a plurality of aeration pipes (9). The plurality of aeration pipes (9) are evenly and spaced apart along the circumference of the rotating shaft (2) and are connected to the air supply channel (6).

3. The aeration device for wastewater treatment according to claim 2, characterized in that, The aeration pipes (9) are all in the shape of spiral blades, and the aeration pipes (9) are all provided with a number of air outlet pipes (7) evenly and at intervals along their respective extension directions.

4. An aeration device for wastewater treatment according to claim 3, characterized in that, Each of the several air outlet pipes (7) is provided with an elastic element (10) and is connected to an end cap (8) through the elastic element (10). The end cap (8) is sleeved on the air outlet pipe (7) and has several air holes (11) on its outer wall.

5. An aeration device for wastewater treatment according to claim 1, characterized in that, The gas supply assembly (4) includes a gas supply pipe (12), a valve (13) and an air inlet pipe (14). One end of the gas supply pipe (12) is detachably connected to the sealing assembly (3), and the other end of the gas supply pipe (12) extends out of the tank body and is connected to the valve (13). The valve (13) is provided with the air inlet pipe (14) connected to an external gas source.

6. An aeration device for wastewater treatment according to any one of claims 1-5, characterized in that, It also includes a base (15), the tank is detachably mounted on the base (15), a drain port (16) is provided on the bottom surface of the tank, and a cover plate (17) is detachably mounted on the drain port (16).

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