Sewage microbubble aeration device

Abstract

The utility model relates to the technical field of sewage aeration devices, in particular to a sewage microbubble aeration device which comprises an aeration assembly and an air pump connected with the aeration assembly, the aeration assembly comprises an air guide shell, a plurality of pore plates arranged in the air guide shell at intervals, a micro motor arranged on one side of the pore plates, an impeller arranged at the output end of the micro motor, and a cavity arranged at an air inlet in the bottom of the air guide shell; according to the aeration effect of the device, micro-bubbles are generated by breaking bubbles through the pore plate and the impeller, the bubble breaking efficiency is improved through the reasonable pore plate design and intermittent air supply, and the spirally arranged air guide shell is compact in structure, small in occupied space in a sewage treatment facility, convenient to mount and uniformly arranged, and high in aeration efficiency. And the dissolved oxygen in the sewage is fully supplemented.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage aeration devices, specifically to a sewage microbubble aeration device. Background Technology

[0002] Wastewater contains large amounts of organic matter, nitrogen, phosphorus, and other pollutants. If discharged directly into the natural environment without effective treatment, it will cause serious damage to water bodies, soil, and ecosystems. For example, excessive organic matter consumes dissolved oxygen in the water, leading to oxygen deficiency and the death of aquatic organisms; nutrients such as nitrogen and phosphorus can cause eutrophication, resulting in the proliferation of algae and disrupting the ecological balance of aquatic bodies. Therefore, wastewater treatment has become a crucial link in environmental protection and sustainable development.

[0003] Traditional wastewater treatment aeration technologies mainly include microporous aeration and surface aeration. Microporous aeration involves installing microporous aerators in an aeration tank to disperse air into the wastewater in the form of tiny bubbles, increasing the dissolved oxygen content in the wastewater and providing the necessary conditions for the growth and metabolism of microorganisms, thereby decomposing organic matter in the wastewater.

[0004] According to mass transfer theory, smaller bubbles have a larger specific surface area, resulting in higher gas-liquid mass transfer efficiency. While traditional microporous aeration can produce relatively small bubbles, their size is still relatively large. Larger bubbles rise quickly in water, resulting in shorter contact time with wastewater and lower oxygen mass transfer efficiency. Furthermore, the large bubbles generated by traditional aeration restrict oxygen transfer from the bubbles to the wastewater, preventing sufficient replenishment of dissolved oxygen in the wastewater. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a wastewater microbubble aeration device.

[0006] The present invention relates to a wastewater microbubble aeration device, comprising an aeration assembly and an air pump connected to the aeration assembly. The aeration assembly includes an air guide housing, a plurality of perforated plates spaced apart within the air guide housing, a micro motor mounted on one side of the perforated plates, an impeller mounted on the output end of the micro motor, and a cavity located at the air inlet at the bottom of the air guide housing. The air guide housing is provided with a water inlet valve and a nozzle mounted on the top of the air guide housing. A piston block is provided inside the cavity, and the piston block is connected to the cavity via a spring. Check valves are provided at both the air inlet and outlet of the cavity.

[0007] Explanation: When the air pump starts supplying air, gas enters the chamber. Due to the gas pressure, the piston block slides within the chamber, stretching the spring. At this time, the gas in the chamber is sent into the air guide housing through the check valve at the outlet. As gas is continuously supplied to the air guide housing, the gas pressure in the chamber gradually decreases. When the gas pressure drops to a certain level, the spring begins to rebound, pushing the piston block back. When the piston block slides back to a certain position, the outlet is blocked, stopping the supply of gas to the air guide housing. This mechanism achieves intermittent air supply and performs preliminary bubble generation treatment on the gas. In addition, the intermittent air supply mechanism can also reduce the risk of impurity deposition and blockage on the orifice plate.

[0008] Furthermore, the air guide shell is a longitudinally extending helical tubular structure.

[0009] Explanation: The longitudinally extending spiral tubular structure increases the flow path length of gas within the gas guide shell, resulting in a smaller footprint in wastewater treatment facilities. Its long flow path allows for the installation of multiple sets of orifice plates and impellers. Compared to a straight gas guide shell, gas travels a longer distance to reach the nozzle within the spiral shell. This extended residence time allows for more thorough mixing with the water and interaction with the impeller, further enhancing bubble breakage and contributing to the generation of more and more uniform microbubbles.

[0010] Furthermore, the aperture of the perforated plates spaced apart within the gas guide housing decreases sequentially from bottom to top.

[0011] Explanation: The gradual breakup process helps form microbubbles of more uniform size. Using a single-aperture plate or a single-stage breakup can lead to uneven bubble breakup and significant size variations. However, an orifice plate with decreasing apertures ensures relatively even breakup at each stage, resulting in more uniform microbubbles. This is crucial for achieving uniform aeration in wastewater. As uniformly sized microbubbles rise in wastewater, their trajectory is relatively stable and regular. These microbubbles can mix better with pollutants in the wastewater, promoting the reaction between pollutants and oxygen. Compared to bubbles of varying sizes, uniform microbubbles can penetrate deeper into the wastewater, resulting in more thorough mixing and improved mixing efficiency of the entire aeration device in wastewater treatment. The gradual breakup method also reduces the impact on the equipment and minimizes wear on the orifice plate and impeller.

[0012] Furthermore, the orifice plates are arranged in pairs opposite each other, and both impellers are located in the cavity between the two orifice plates; there are multiple water inlet valves, and each water inlet valve is located on the air guide shell wall of the cavity between the two orifice plates.

[0013] Explanation: When gas passes through the orifice plate, water enters between the two orifice plates via the inlet valve. The water interacts with the gas, causing both to flow and mix more directly and intensely. This significantly improves the bubble-breaking effect, breaking the gas bubbles into smaller, more uniform microbubbles. Furthermore, this design helps improve oxygen dissolution efficiency because smaller microbubbles have a larger surface area and longer residence time in wastewater, thus enhancing wastewater treatment. Simultaneously, this design enhances the uniformity of wastewater mixing, preventing uneven oxygen concentrations in certain areas. The water flow also flushes the orifice plates, reducing the risk of clogging and ensuring the stability of the gas-water mixing process, which is beneficial for the stable operation of the equipment.

[0014] Furthermore, the two impellers rotate in opposite directions.

[0015] Explanation: The oppositely rotating impellers enhance the mixing effect of gas and water. When gas mixes with water through the orifice plate, the oppositely rotating impellers exert forces on the mixed fluid from different directions, making the mixing of gas and water more intense, thereby further increasing the degree of bubble breakage and promoting the generation of more, smaller and more uniform microbubbles. This impeller configuration can also stabilize the fluid flow state. The opposite rotations counterbalance each other, reducing vortices or turbulent instability caused by rotation in one direction, thus ensuring the stability of the entire device during operation.

[0016] Furthermore, there are multiple aeration components, and the air inlets of the multiple aeration components are connected to the air pump through check pipes.

[0017] Explanation: Setting up multiple aeration components expands the aeration range, reduces dead zones, and distributes gas more evenly over a larger area, improving aeration efficiency and effectiveness, and ensuring a sufficient gas supply to the entire treatment area. The presence of check valves is crucial, as they prevent backflow of gas. When the air pump stops working or pressure fluctuates, the check valves prevent gas already in the aeration components from flowing back into the pump. This not only protects the pump from the impact of backflowing gas, reducing the risk of pump damage, but also maintains stable air pressure within the aeration components, ensuring relatively stable gas flow in each component, thereby ensuring the stable and efficient operation of the entire aeration system.

[0018] Furthermore, the impeller blades have comb-shaped serrations along their edges.

[0019] Explanation: The presence of comb-shaped serrations enhances the ability to break up bubbles. When the impeller rotates, the serrations on the edge of the blades cut and disturb the passing bubbles. Compared to blades with smooth edges, this serrated structure can more effectively cut larger bubbles into smaller ones, thereby improving the bubble breaking effect and generating more uniform microbubbles. During rotation, the comb-shaped serrations disrupt the flow state of the surrounding fluid, promoting more thorough mixing between gas and water. It can create complex flow fields locally, allowing gas and water to mix better and improving the oxygen dissolution efficiency in water.

[0020] The beneficial effects of this invention are as follows: In terms of aeration, this device generates microbubbles by breaking up air bubbles through a perforated plate and impeller. These microbubbles have a large specific surface area, which can more effectively transfer oxygen to the wastewater and have a longer residence time in the wastewater, thus enhancing the oxygenation effect. Furthermore, the bubble breaking and intermittent air supply make the gas distribution more uniform, promoting the reaction between pollutants and oxygen and improving the wastewater treatment effect. The reasonable perforated plate design and intermittent air supply improve the bubble breaking efficiency. The spirally arranged air guide shell makes the bubble treatment process longer and the degree of bubble breaking higher. The structure is compact and occupies little space in wastewater treatment facilities, making it easy to install and distribute evenly according to usage needs, thus achieving sufficient replenishment of dissolved oxygen in wastewater. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a cross-sectional view of the air guide shell of Embodiment 1 of this utility model;

[0023] Figure 3 This is a partial structural schematic diagram of a pair of perforated plates according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a longitudinal sectional view of the cavity in Embodiment 1 of this utility model;

[0025] Among them, 1-air guide shell, 11-nozzle, 12-water inlet valve, 2-orifice plate, 3-micro motor, 4-impeller, 5-cavity, 51-piston block, 52-spring. Detailed Implementation

[0026] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0027] Example 1: As Figures 1-3The wastewater microbubble aeration device shown includes an aeration component and an air pump connected to the aeration component; the aeration component includes an air guide housing 1, a plurality of perforated plates 2 spaced apart in the air guide housing 1, a micro motor 3 disposed on one side of the perforated plates 2, an impeller 4 disposed on the output end of the micro motor 3, and a cavity 5 disposed at the air inlet at the bottom of the air guide housing 1.

[0028] like Figure 1 , 3 As shown, the air guide housing 1 is provided with a water inlet valve 12, and the top of the air guide housing 1 is provided with a nozzle 11; the water inlet valve 12 is provided with a one-way water inlet valve from the outside to the inside of the air guide housing 1, and the nozzle 11 is provided with a one-way outlet valve from the inside to the outside of the air guide housing 1.

[0029] like Figure 4 As shown, a piston block 51 is provided inside the cavity 5. The piston block 51 is connected to the inside of the cavity 5 by a spring 52. A check valve is provided at the air inlet of the cavity 5 to allow one-way air intake from the inside of the pipe connected to the air pump into the cavity 5. A check valve is provided at the air outlet to allow one-way air intake from the inside of the cavity 5 into the air-to-air housing 1.

[0030] like Figure 3 As shown, the orifice plates 2 are arranged in pairs opposite each other, and the two impellers 4 are located in the cavity between the two orifice plates 2; there are a total of eight pairs, that is, sixteen orifice plates 2. There are eight water inlet valves 12, and each water inlet valve 12 is located on the wall of the air guide housing 1 of the cavity between the two orifice plates 2; the two impellers 4 rotate in opposite directions.

[0031] The air guide shell 1 is a longitudinally extending spiral tubular structure; the aperture of the perforated plates 2 arranged at intervals inside the air guide shell 1 decreases sequentially from bottom to top; the apertures of the eight pairs of perforated plates 2 are as follows from bottom to top: 7mm, 6mm, 5mm, 3mm, 2mm, 1mm, 0.8mm, and 0.5mm; there are ten aeration components, and the air inlets of the ten aeration components are connected to the air pump through check pipes.

[0032] It should be noted that this embodiment also includes a power supply and a controller, and the power supply, controller, air pump, micro motor 3, impeller 4 and nozzle 11 are all commercially available products, which will not be described in detail here;

[0033] In this embodiment, the air pump, micro motor 3, and impeller 4 are all electrically connected to the power supply and the controller, respectively.

[0034] The working principle of this embodiment is as follows: When the air pump starts supplying air, the gas enters the cavity 5. Due to the gas pressure, the piston block 51 slides in the cavity, causing the spring 52 to stretch. At this time, the gas in the cavity 5 is sent into the air guide housing 1 through the check valve at the outlet. As the gas is continuously sent into the air guide housing 1, the gas pressure in the cavity 5 gradually decreases. When the gas pressure drops to a certain level, the spring 52 begins to rebound, pushing the piston block 51 back. When the piston block 51 slides back to a certain position, the outlet is blocked, stopping the supply of gas to the air guide housing 1. Intermittent gas supply is achieved through this mechanism. Multiple perforated plates 2 are arranged at intervals inside the air guide housing 1. When the gas entering the air guide housing 1 passes through these perforated plates 2, the gas is divided and refined due to the specific structure and size of the holes on the perforated plates 2. The micro motor 3 drives the impeller 4 to rotate. The impeller 4 is located on one side of the perforated plate 2. The rotating impeller 4 further stirs and breaks up the gas after it passes through the perforated plate 2. The high-speed rotation of the impeller 4 causes the gas to be fully mixed with the surrounding water and further refined, thereby breaking larger bubbles into microbubbles; the water inlet valve 12 on the air guide housing 1 allows water to enter the air guide housing 1, and inside the air guide housing 1, the microbubbles formed by the breakage are fully mixed with the water; the water mixed with microbubbles is discharged through the nozzle 11 at the top of the air guide housing 1.

[0035] Example 2: This example differs from Example 1 in that there are five aeration components, the perforated plates 2 are arranged in pairs facing each other, and the two impellers 4 are located in the cavity between the two perforated plates 2; there are a total of six pairs, that is, twelve perforated plates 2. There are six water inlet valves 12, and each water inlet valve 12 is located on the wall of the air guide shell 1 in the cavity between the two perforated plates 2; the diameters of the twelve pairs of perforated plates 2 from bottom to top are: 7mm, 5mm, 3mm, 2mm, 0.8mm, and 0.5mm.

[0036] Example 3: The difference between this example and Example 1 is that the impeller 4 has comb-shaped serrations on the edge of its blades.

Claims

1. A wastewater microbubble aeration device, characterized in that, It includes an aeration assembly and an air pump connected to the aeration assembly; the aeration assembly includes an air guide housing (1), a plurality of perforated plates (2) spaced apart in the air guide housing (1), a micro motor (3) disposed on one side of the perforated plates (2), an impeller (4) disposed on the output end of the micro motor (3), and a cavity (5) disposed at the air inlet at the bottom of the air guide housing (1); The air guide housing (1) is provided with a water inlet valve (12), and a nozzle (11) is provided on the top of the air guide housing (1); A piston block (51) is provided inside the cavity (5). The piston block (51) is connected to the inside of the cavity (5) by a spring (52). Check valves are provided at both the air inlet and the air outlet of the cavity (5).

2. The wastewater microbubble aeration device according to claim 1, characterized in that, The air guide shell (1) is a longitudinally extending spiral tubular structure.

3. The wastewater microbubble aeration device according to claim 2, characterized in that, The aperture of the perforated plates (2) arranged at intervals inside the air guide housing (1) decreases sequentially from bottom to top.

4. The wastewater microbubble aeration device according to claim 1, characterized in that, The orifice plates (2) are arranged in pairs opposite each other, and the two impellers (4) are located in the cavity between the two orifice plates (2); there are multiple water inlet valves (12), and each water inlet valve (12) is located on the wall of the air guide shell (1) of the cavity between the two orifice plates (2).

5. A wastewater microbubble aeration device according to claim 4, characterized in that, The two impellers (4) rotate in opposite directions.

6. A wastewater microbubble aeration device according to claim 1, characterized in that, There are multiple aeration components, and the air inlets of the multiple aeration components are connected to the air pump through check pipes.

7. A wastewater microbubble aeration device according to claim 1, characterized in that, The impeller (4) has comb-shaped serrations on the edge of its blades.

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