Novel aerator

Abstract

The utility model relates to the technical field of water treatment equipment, in particular to a novel aerator, which comprises a venturi mixing section and an air pipe, the lower end of the air pipe is connected with an aeration pipe through a flange plate, the aeration pipe is U-shaped, the lower end of the aeration pipe is fixedly provided with an air nozzle, and the air nozzle is inserted into the inner side of the lower end of the venturi mixing section; according to the novel aerator disclosed by the utility model, through quadruple mixing of Venturi, rotation, shearing and diffusion, air flow is fully mixed with sewage in the aerator, large bubbles are continuously collided and cut into tiny bubbles by a shear knife in the rotating and rising process, micropore aeration is avoided, blockage is avoided, meanwhile, negative pressure formed at the bottom of the aerator can entrain sludge at the bottom of a pool, and the aeration efficiency is improved. The novel aerator disclosed by the utility model is simple in structure, can form a circulating flow with the upper part of the aerator, is high in oxygen transfer efficiency, is convenient to install, does not need to stop production, can be independently lifted up to check, clean and maintain the aerator, and does not need to pump water and influence the treatment capacity.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, specifically a novel aerator. Background Technology

[0002] Currently, aerators are generally installed at the bottom of the aerobic biological treatment tank in wastewater treatment plants. By pressurizing with a jet pump, the biological wastewater and compressed air are mixed in the aerator, creating dissolved oxygen and mixing conditions for the aerobic nitrification reaction of biological bacteria.

[0003] However, this aeration method has several drawbacks: firstly, it consumes a lot of energy, mainly because it requires multiple jet pumps to operate; secondly, it is impossible to check for leaks or blockages in the aerators during normal operation; and thirdly, when the aerators experience large-scale blockages or scaling, it can easily lead to an increased blind zone at the bottom of the tank, uneven dissolved oxygen, and sludge accumulation. This necessitates shutdown, pumping water into the confined space for operation, which is complex, affects processing capacity for extended periods, and poses significant safety risks. Therefore, this utility model proposes a novel aerator to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a novel aerator to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel aerator, comprising: a Venturi mixing section and an air pipe, wherein the lower end of the air pipe is connected to an aeration pipe via a flange, the aeration pipe is U-shaped, and an air nozzle is fixedly installed at the lower end of the aeration pipe, the air nozzle being inserted into the inner side of the lower end of the Venturi mixing section;

[0006] A swirling mixing section is fixedly installed at the upper end of the venturi mixing section, and a shearing cylinder is fixedly installed at the upper end of the swirling mixing section. A shearing blade is installed at the inner end of the shearing cylinder, and a diffuser top plate is installed at the upper end of the shearing cylinder through a connecting column.

[0007] Preferably, a plurality of aeration holes are evenly provided on the side wall of the aeration pipe at the end away from the air nozzle.

[0008] Preferably, a connector is fixedly installed on the outer wall of the swirling section and the shearing cylinder, and the other end of the connector is fixed to the outer wall of the aeration pipe.

[0009] Preferably, an aeration base is provided at the lower end of the Venturi mixing section, and an aeration pipe is fixedly passed through the aeration base.

[0010] Preferably, the diffuser top plate is conical, and a number of diffuser teeth are uniformly fixedly installed on the outer side of the upper end of the diffuser top plate.

[0011] Preferably, the lower end of the shearing cylinder is connected to the swirling section, and the upper end is provided with an air outlet.

[0012] Preferably, the diffuser top plate is located directly above the air outlet, one end of the connecting column is fixed to the outer wall of the diffuser top plate, and the other end is fixed to the outer wall of the shear cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This novel aerator utilizes a quadruple mixing process of Venturi, rotation, shearing, and diffused flow. The airflow is thoroughly mixed with the wastewater within the aerator. Large bubbles are continuously collided and cut into tiny bubbles by the shearing blades during their rotation and ascent. This process is not microporous aeration and will not cause blockage. Simultaneously, a negative pressure is created at the bottom of the aerator, which draws in sludge from the bottom of the tank and forms a circulating flow with the upper part of the aerator, resulting in high oxygen transfer efficiency.

[0015] The novel aerator of this utility model has an aeration pipe on its exterior, and the aeration holes of the aeration pipe are located in the central area of ​​the circulating flow. In this way, the pipe is not wasted, and the dead zone of aeration is reduced.

[0016] The novel aerator of this utility model is easy to install, requires no production shutdown, and can be lifted up separately for inspection, cleaning, and maintenance without the need for pumping water or affecting the treatment capacity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the aerator of this utility model;

[0018] Figure 2 This is a plan view of the diffuser top cover of the aerator of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the aerator shear cylinder of this utility model.

[0020] In the diagram: 1. Aeration base; 2. Air nozzle; 3. Venturi mixing section; 4. Swirling mixing section; 5. Shear blade; 6. Diffuser top cover; 7. Diffuser teeth; 8. Air pipe; 9. Aeration pipe; 10. Shear cylinder; 11. Connector; 12. Aeration hole; 13. Connecting column. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figures 1 to 3This utility model provides a technical solution: a novel aerator, comprising: a Venturi mixing section 3, an air pipe 8, an aeration pipe 9 connected to the lower end of the air pipe 8 via a flange, the aeration pipe 9 being U-shaped, an air nozzle 2 fixedly installed at the lower end of the aeration pipe 9, the air nozzle 2 being inserted into the inner side of the lower end of the Venturi mixing section 3, the air nozzle 2 being located at the throat of the Venturi mixing section 3, the air nozzle 2 being surrounded by air outlet holes, and the main airflow being sprayed upwards.

[0023] An aeration base 1 is installed at the lower end of the Venturi mixing section 3. An aeration pipe 9 is fixedly passed through the aeration base 1. Wastewater and sludge around the base are sucked into the Venturi mixing section 3 and mixed with air for the first time. A vortex mixing section 4 is fixedly installed at the upper end of the Venturi mixing section 3. The upper part of the Venturi mixing section 3 is expanded and connected to the vortex mixing section 4. The air-water mixture is mixed again in the vortex mixing section 4 and then begins to rotate at high speed. A shearing cylinder 10 is connected to the upper part of the vortex mixing section 4. A connector 11 is fixedly installed on the outer wall of the vortex mixing section 4 and the shearing cylinder 10. The other end of the connector 11 is fixed to the outer wall of the aeration pipe 9. The vortex mixing section 4, the shearing cylinder 10, and the Venturi mixing section 3 are fixed to one side of the aeration pipe 9. The equipment can be lifted out of the water surface by lifting the aeration pipe 9 and the air pipe 8 for easy maintenance.

[0024] The lower end of the shearing cylinder 10 is connected to the swirling mixing section 4, and the upper end is provided with an air outlet. The upper end of the shearing cylinder 10 is equipped with a diffuser top plate 6 through a connecting column 13. The diffuser top plate 6 is conical, and several diffuser teeth 7 are evenly fixed on the outer side of the upper end of the diffuser top plate 6. The diffuser top plate 6 is located directly above the air outlet. One end of the connecting column 13 is fixed to the outer wall of the diffuser top plate 6, and the other end is fixed to the outer wall of the shearing cylinder 10, thus fixing the diffuser top plate 6 to the upper end of the shearing cylinder 10. Shearing blades 5 are arranged rotating inside the shearing cylinder 10. The shearing blades 5 are thin in the middle and thick around the edges. After the air bubbles in the air-water mixture are cut by the rotating shearing blades 5, they flow to the diffuser top plate 6. After passing through the diffuser teeth 7 on the outer side of the diffuser top plate 6, the microbubbles are dispersed into the sewage around the aerator.

[0025] A plurality of aeration holes 12 are evenly provided on the side wall of the aeration pipe 9 away from the air nozzle 2. One end of the aeration pipe 9 is connected to the air nozzle 2 and the other end is connected to the air pipe 8. Air enters from the air pipe 8 and is sprayed out from the aeration holes 12 or the air nozzle 2. The aeration holes 12 of the aeration pipe 9 are set in the central area of ​​the circulating flow. In this way, the pipe is not wasted and the aeration dead zone is reduced.

[0026] When this device is working, air enters through the air pipe 8 and is ejected from the air nozzle 2. Wastewater and sludge around the aeration base 1 are sucked into the Venturi mixing section 3 and mixed with the air for the first time. The upper part of the Venturi mixing section 3 is expanded and connected to the swirl mixing section 4. The air-water mixture is mixed again in the swirl mixing section 4 and then begins to rotate at high speed. The upper part of the swirl mixing section 4 is connected to the shearing cylinder 10. Shearing blades 5 are arranged rotating inside the shearing cylinder 10. The shearing blades 5 are thin in the middle and thick around the edges. The air bubbles in the air-water mixture are cut by the rotating shearing blades 5 and flow to the diffuser top cover 6. Finally, the microbubbles cut by the shearing blades 5 are dispersed into the sewage around the aerator through the diffuser teeth 7.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel aerator, comprising: Venturi mixing section (3) and air pipe (8), characterized in that: the lower end of the air pipe (8) is connected to an aeration pipe (9) through a flange, the aeration pipe (9) is U-shaped, and an air nozzle (2) is fixedly installed at the lower end of the aeration pipe (9), and the air nozzle (2) is inserted into the inner side of the lower end of the Venturi mixing section (3); A swirling mixing section (4) is fixedly installed at the upper end of the venturi mixing section (3), and a shearing cylinder (10) is fixedly installed at the upper end of the swirling mixing section (4). A shearing blade (5) is provided at the inner end of the shearing cylinder (10), and a diffuser top plate (6) is installed at the upper end of the shearing cylinder (10) through a connecting column (13).

2. The novel aerator according to claim 1, characterized in that: The aeration pipe (9) has several aeration holes (12) evenly distributed on the side wall of the end away from the air nozzle (2).

3. The novel aerator according to claim 1, characterized in that: A connector (11) is fixedly installed on the outer wall of the swirling section (4) and the shearing cylinder (10), and the other end of the connector (11) is fixed on the outer wall of the aeration pipe (9).

4. A novel aerator according to claim 1, characterized in that: An aeration base (1) is provided at the lower end of the Venturi mixing section (3), and an aeration pipe (9) is fixedly passed through the aeration base (1).

5. A novel aerator according to claim 1, characterized in that: The diffuser top plate (6) is conical, and several diffuser teeth (7) are uniformly fixedly installed on the outer side of the upper end of the diffuser top plate (6).

6. A novel aerator according to claim 5, characterized in that: The lower end of the shearing cylinder (10) is connected to the swirling section (4), and the upper end is provided with an air outlet.

7. A novel aerator according to claim 6, characterized in that: The diffuser top plate (6) is located directly above the air outlet. One end of the connecting column (13) is fixed to the outer wall of the diffuser top plate (6), and the other end is fixed to the outer wall of the shear cylinder (10).

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