Aeration device

Abstract

The invention relates to an aeration device, and relates to the technical field of aeration, the aeration device comprises an oscillator, the oscillator comprises a plurality of jet flow groups, the jet flow groups are symmetrically arranged, each jet flow group comprises a main jet flow channel and a feedback channel, the main jet flow channels are obliquely arranged, the plurality of main jet flow channels share one air inlet, and the main jet flow channels are provided with independent air outlets; an aeration disc is mounted at the air outlet and comprises a disc surface, micropores are formed in the disc surface, one end of each feedback flow channel is communicated with the air inlet of the corresponding main jet flow channel, and the other end of each feedback flow channel is communicated with the corresponding main jet flow channel. The oxygen distribution device has the advantage of being good in oxygen distribution effect.

Description

Technical Field

[0001] The present application relates to the technical field of aeration, and in particular to an aeration device. Background Art

[0002] In the sewage treatment process, the aerobic tank is a key treatment unit, relying primarily on aerobic microorganisms to decompose and transform organic matter in the sewage. Aeration is an important means of providing sufficient oxygen for aerobic microorganisms. The effectiveness of aeration directly affects the activity of aerobic microorganisms and the ultimate sewage treatment results.

[0003] Most traditional aeration devices use a fixed aeration method, such as perforated tube aeration or microporous aeration disk. The distribution of oxygen in the sewage is not uniform, and some areas may have excess or insufficient oxygen, which reduces the efficiency of oxygen utilization and affects the growth and metabolism of aerobic microorganisms. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide an aeration device, which has the advantage of better oxygen distribution effect.

[0005] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0006] An aeration device includes an oscillator, the oscillator includes multiple jet groups, the jet groups include a main jet channel and a feedback channel, the main jet channel is arranged obliquely, the multiple main jet channels share an air inlet, the main jet channel has an independent air outlet, an aeration plate is installed at the air outlet, the aeration plate includes a plate surface, micropores are provided on the plate surface, one end of the feedback channel is connected to the air inlet of the main jet channel, and the other end is connected to the corresponding main jet channel, the incident angle b2 of the gas entering the main jet channel satisfies 30°≤b2≤60°, the included angle b1 of the main jet channel satisfies 45°≤b1≤75°, and the diameter d of the air inlet of the main jet channel satisfies The diameter of the aeration plate is D, unit: cm, the micropore radius is r, unit: cm, and the micropore density is ρ, unit: cm -2 , the gas flow rate of a single micropore is q mi , unit: ml / s, the gas flow rate at the inlet is v in , unit: cm / s, the curvature radius R of the feedback channel satisfies 10mm≤R≤30mm.

[0007] In a preferred example, the present application can be further configured as follows: the disk surface material of the aeration disk includes at least one of EPDM rubber, polyvinyl chloride or ceramic material.

[0008] In a preferred example, the present application can be further configured as follows: the material of the oscillator is flexible and corrosion-resistant.

[0009] In a preferred example, the present application can be further configured as follows: the diameter of the micropores ranges from 0.1 mm to 0.5 mm, and the density of the micropores ranges from 40 to 100 per square centimeter.

[0010] In a preferred example, the present application can be further configured as follows: the density of microholes is relatively high in the central area of ​​the disk surface and gradually decreases towards the edge.

[0011] In a preferred example, the present application can be further configured as follows: it also includes a main pipe, a plurality of oscillators are provided on the main pipe, and the aeration disks on the plurality of oscillators are cross-distributed.

[0012] In a preferred example, the present application can be further configured as follows: the projection of the oscillator on the horizontal plane and the projection of the main pipe on the horizontal plane form an angle.

[0013] This application has the following advantages:

[0014] When airflow enters the main jet channel, the channel's geometry forces the incident angle b2 to fall within the range of 30° ≤ b2 ≤ 60°. This causes the airflow to separate and accelerate at specific locations, resulting in unstable flow conditions. A portion of the airflow, driven by the Coanda effect, flows along the channel walls and into the feedback channel, generating backflow. This backflow remixes with the main jet, altering its direction and velocity distribution. This interaction enables dynamic and regular switching of airflow between the two outlets, enabling intermittent aeration control of the connected aeration discs and ensuring more uniform oxygen distribution throughout the wastewater. Furthermore, intermittent aeration allows the wastewater's own flow dynamics to flush and clean impurities that have adhered to the micropores during periods of inactivity, effectively preventing further accumulation and solidification. The dynamic changes in airflow and water flow caused by intermittent aeration alter the pressure distribution and flow patterns around the aeration discs, making it difficult for impurities to form stable deposits on the micropores and significantly reducing clogging. It reduces the frequency and cost of maintenance, significantly improves the stability and reliability of device operation, and effectively guarantees the good performance of the device in long-term operation.

[0015] The intermittent aeration achieved by the Coanda effect generated by the fluid oscillator based on the non-steady-state excitation of the fluid makes the movement trajectory of the bubbles in the sewage complicated, effectively increases the contact time and contact area between the bubbles and the sewage, and strongly promotes the dissolution of oxygen.

[0016] The angle b1 of the main jet channel satisfies the range of 45°≤b1≤75°. This design ensures the production of uniformly sized and appropriately sized fine bubbles at varying aeration intensities. When the airflow from the fluid oscillator outlet enters the aeration disc, it is efficiently dispersed into a large number of tiny bubbles, increasing the contact area and duration between the bubbles and the wastewater, and improving oxygen transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the usage status of this application.

[0018] Figure 2 This is a schematic diagram of the oscillator structure of this application.

[0019] Figure 3 This is a schematic diagram of the water flow redirection structure of the present application, in which the direction of the arrow in the oscillator indicates the direction of water flow.

[0020] Reference numerals: 1. Main pipe; 2. Jet group; 21. Main jet channel; 22. Feedback channel; 3. Aeration disc. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the accompanying drawings.

[0022] Reference Figure 1-Figure 3 The present application discloses an aeration device comprising a main pipe 1 equipped with multiple oscillators. The horizontal projections of the oscillators form an angle with the horizontal projection of the main pipe 1. The main pipe 1 is connected to an external air source, such as a blower. The oscillators are made of a flexible and corrosion-resistant material, such as high-strength rubber or plastic. Their inner surfaces are smoothed to ensure smooth airflow.

[0023] The oscillator includes a plurality of jet groups 2, the oscillator includes a plurality of jet groups 2, the jet group 2 includes a main jet channel 21 and a feedback channel 22, the main jet channel 21 is tilted, and the plurality of main jet channels 21 share an air inlet, the main jet channel 21 has an independent air outlet, an aeration plate 3 is installed at the air outlet, the aeration plate 3 includes a disk surface, and micropores are provided on the disk surface. One end of the feedback channel is connected to the air inlet of the main jet channel 21, and the other end is connected to the corresponding main jet channel 21. The incident angle b2 of the gas entering the main jet channel 21 satisfies 30°≤b2≤60°, the angle b1 of the main jet channel 21 satisfies 45°≤b1≤75°, and the diameter d of the air inlet of the main jet channel 21 satisfies The diameter of the aeration plate is D, unit: cm, the micropore radius is r, unit: cm, and the micropore density is ρ, unit: cm -2 When ρ = 1, that is, 1 per square centimeter, the gas flow rate of a single micropore is q mi , unit: ml / s, the gas flow rate at the inlet is vin , unit: cm / s, the curvature radius R of the feedback channel satisfies 10mm≤R≤30mm.

[0024] The material of the disk surface is one or more combinations of EPDM rubber, polyvinyl chloride or ceramic materials. The diameter of the micropores ranges from 0.1 mm to 0.5 mm, and the density of the micropores ranges from 40 to 100 per square centimeter.

[0025] The operating principle of this embodiment is as follows: The gas source is activated, and gas enters the oscillator's air inlet, forming a primary jet within the main jet channel 21. This primary jet, under the action of feedback reflux, switches the main stream, allowing the gas to enter the aeration disks 3 of different jet groups 2. After receiving the gas, the aeration disks 3 disperse the gas into tiny bubbles through micropores on their surfaces, releasing them into the wastewater in the aerobic tank. As the bubbles rise through the wastewater, they come into contact with it, dissolving oxygen into the wastewater, providing the necessary oxygen for aerobic microorganisms and promoting the decomposition and conversion of organic matter in the wastewater.

[0026] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An aeration device, characterized in that: The oscillator includes an oscillator, which includes multiple jet groups. The jet group includes a main jet channel and a feedback channel. The main jet channel is tilted. The multiple main jet channels share an air inlet. The main jet channel has an independent air outlet. An aeration plate is installed at the air outlet. The aeration plate includes a plate surface. Micropores are provided on the plate surface. One end of the feedback channel is connected to the air inlet of the main jet channel, and the other end is connected to the corresponding main jet channel. The incident angle b2 of the gas entering the main jet channel satisfies 30°≤b2≤60°, the angle b1 of the main jet channel satisfies 45°≤b1≤75°, and the diameter d of the air inlet of the main jet channel satisfies The diameter of the aeration plate is D, unit: cm, the micropore radius is r, unit: cm, and the micropore density is ρ, unit: cm -2 , the gas flow rate of a single micropore is q mi , unit: ml / s, the gas flow rate at the inlet is v in , unit: cm / s, the curvature radius R of the feedback channel satisfies 10mm≤R≤30mm.

2. An aeration device according to claim 1, characterized in that: The disk surface material of the aeration disk includes at least one of EPDM rubber, polyvinyl chloride or ceramic material.

3. An aeration device according to claim 1, characterized in that: The material of the oscillator is flexible and corrosion-resistant.

4. An aeration device according to claim 2, characterized in that: The diameter of the micropores ranges from 0.1 mm to 0.5 mm, and the density of the micropores ranges from 40 to 100 per square centimeter.

5. An aeration device according to claim 4, characterized in that: The density of micropores is relatively high in the center of the disk and gradually decreases towards the edge.

6. An aeration device according to claim 1, characterized in that: It also includes a main pipe, on which a plurality of oscillators are arranged, and the aeration plates on the plurality of oscillators are cross-distributed.

7. An aeration device according to claim 6, characterized in that: The projection of the oscillator on the horizontal plane and the projection of the main pipe on the horizontal plane form an angle.

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