A gas stripping aerator

Abstract

The utility model relates to a stripping type aerator, including the pipe body of vertical setting and the air inlet pipe of connecting pipe body, the bottom of pipe body is close to the setting of air inlet pipe, the thickness of arc convexity gradually increases along the vertical direction upwards, the downside of arc convexity and the pipe wall of pipe body smooth transition, the upper side of arc convexity and the pipe wall form the step between, in the same horizontal plane, around the axis of pipe body, the even setting of a row at least two arc convexity is set, along the axis of pipe body, the pipe wall is provided at least two rows arc convexity, and the arc convexity of adjacent column is set in dislocation. The utility model discloses a step hinders the reflux of gas-liquid mixture, and the oxygen supply efficiency of stripping type aerator is improved. And arc convexity is continuously and evenly set, reduces the generation of turbulent flow, reduces the resistance of arc convexity to gas-liquid mixture, is convenient for the ascending of gas-liquid mixture, and guarantees the oxygen supply efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aerator technology, and in particular to an airlift aerator. Background Technology

[0002] Airlift aerators supply oxygen to the water by releasing compressed air into it. Simultaneously, the rising compressed air lifts sludge from the bottom of the pool, preventing it from accumulating.

[0003] In an airlift aerator, the upward force comes from the power of compressed air and the buoyancy of the gas-liquid mixture. When the air supply pressure fluctuates or is insufficient, the gas-liquid mixture inside the pipe will flow back along the pipe. This backflow of the gas-liquid mixture hinders the normal flow of the medium inside the pipe, significantly increasing the resistance to the flow of the medium and affecting the oxygen supply efficiency of the airlift aerator. Furthermore, the gas-liquid mixture usually contains sludge particles and suspended impurities, which can easily accumulate inside the pipe, causing blockage. This increases the maintenance frequency and downtime of the airlift aerator, further reducing its oxygen supply efficiency.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an airlift aerator to improve oxygen supply efficiency.

[0006] The technical solution of this utility model is as follows: The airlift aerator includes a vertically arranged tube and an air inlet pipe connecting to the tube. The air inlet pipe is located near the bottom of the tube. Arc-shaped protrusions are formed on the tube wall. The thickness of the arc-shaped protrusions gradually increases vertically upwards. The lower side of the arc-shaped protrusion smoothly transitions to the tube wall, while the upper side forms a step between the arc-shaped protrusion and the tube wall. Within the same horizontal plane, at least two arc-shaped protrusions are evenly arranged in a row around the axis of the tube. Along the axis of the tube, at least two rows of arc-shaped protrusions are formed on the tube wall, with adjacent rows of arc-shaped protrusions staggered.

[0007] A further technical solution is that, around the axis of the tube, the thickness of the arc-shaped protrusion gradually decreases in a clockwise or counterclockwise direction.

[0008] A further technical solution is that the cross-section of the step is circular along the axial direction of the pipe body.

[0009] A further technical solution is that the diameter of the pipe gradually increases upward along the axis of the pipe body.

[0010] A further technical solution is that the surface of the arc-shaped protrusion away from the pipe wall is the outer facade. The angle between the pipe wall and the pipe axis is greater than or equal to the angle between the outer facade and the pipe wall.

[0011] A further technical solution is that the surface of the arc-shaped protrusion away from the pipe wall is the outer facade. The angle between the pipe wall and the pipe axis is less than the angle between the outer facade and the pipe wall.

[0012] A further technical solution involves providing an upper flare at the top of the pipe body. The diameter of the upper flare gradually increases upwards along the pipe body's axis.

[0013] A further technical solution involves providing a flared opening at the lower end of the pipe body. The diameter of the flared opening gradually increases downwards along the axis of the pipe body.

[0014] A further technical solution is that the intake pipe connects to the pipe body along the outer cylindrical surface of the pipe body.

[0015] The beneficial technical effects of this utility model are as follows: (1) In this utility model, the air-lift aerator has an air inlet pipe connected to one end of the pipe near the bottom. The compressed air injected by the air inlet pipe increases the contact area between the water and the air to supply oxygen to the water. The pipe wall is provided with arc-shaped protrusions. The lower side of the arc-shaped protrusion and the pipe wall transition smoothly, and the upper side of the arc-shaped protrusion and the pipe wall form a step. When the gas-liquid mixture rises, the smooth transition between the arc-shaped protrusion and the pipe wall reduces the resistance to the flow of the gas-liquid mixture. When the upward power provided by the compressed air is insufficient, the gas-liquid mixture flows back along the pipe wall, and there is interference between the gas-liquid mixture and the step, which hinders the backflow of the gas-liquid mixture. The reduction of the backflow of the gas-liquid mixture improves the oxygen supply efficiency of the air-lift aerator. The arc-shaped protrusions are evenly staggered in at least two rows around the axis of the pipe. The continuous and uniform arrangement of the arc-shaped protrusions reduces the generation of turbulence, reduces the resistance of the arc-shaped protrusions to the gas-liquid mixture, facilitates the rise of the gas-liquid mixture, and ensures the oxygen supply efficiency of the air-lift aerator.

[0016] (2) Further, the thickness of the arc-shaped protrusion gradually decreases around the axis of the pipe body in a clockwise or counterclockwise direction. When the gas-liquid mixture flows along the outer surface of the arc-shaped protrusion, the outer surface provides the gas-liquid mixture with forces in both axial and radial directions. The axial component continues to push the gas-liquid mixture to move along the axis of the pipe body; the radial component pushes the gas-liquid mixture to rotate around the axis of the pipe body along the pipe wall, thereby driving the rising gas-liquid mixture in the pipe body to spiral upward. The centrifugal force generated when the gas-liquid mixture spirals upward can offset part of the gravity of the gas-liquid mixture, ensuring that the gas-liquid mixture flows upward into the water body along the pipe body, thus ensuring the oxygen supply efficiency of the airlift aerator.

[0017] (3) Further, along the axial direction of the pipe body, the cross section of the step is arc-shaped. A guide groove is formed between adjacent arc protrusions. The arc-shaped step avoids abrupt changes in the flow direction of the gas-liquid mixture when it flows along the guide groove, so as to reduce the resistance encountered by the gas-liquid mixture when it flows along the guide groove. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of an airlift aerator according to an embodiment of the present disclosure is shown.

[0019] Figure 2 A vertical cross-sectional schematic diagram of an airlift aerator according to an embodiment of the present disclosure is shown.

[0020] Figure 3 A schematic diagram of the arc-shaped protrusion in the main view direction is shown in an airlift aerator according to an embodiment of the present disclosure.

[0021] Figure 4 The diagram shows a top view of the arc-shaped protrusion in an airlift aerator according to an embodiment of the present disclosure.

[0022] Marked in the attached diagram: 1. Upper flare; 2. Pipe body; 21. Arc-shaped protrusion; 22. Vortex zone; 23. Step; 24. Exterior facade; 25. Guide groove; 26. Pipe wall; 3. Inlet pipe; 4. Lower flare. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0024] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0025] Figure 1A three-dimensional structural schematic diagram of an airlift aerator according to an embodiment of the present disclosure is shown. Figure 2 A vertical cross-sectional schematic diagram of an airlift aerator according to an embodiment of the present disclosure is shown. Figure 3 A schematic diagram of the arc-shaped protrusion in the main view direction is shown in an airlift aerator according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 and Figure 3 The airlift aerator includes a vertically arranged pipe body 2 and an air inlet pipe 3 connected to the pipe body 2. The air inlet pipe 3 is located near the bottom of the pipe body 2 and is connected to a compressed air source (not shown in the figure). The compressed air injected by the air inlet pipe 3 increases the contact area between the water and the air to supply oxygen to the water. An arc-shaped protrusion 21 is provided on the pipe wall 26 of the pipe body 2. The thickness of the arc-shaped protrusion 21 gradually increases vertically upwards. The lower side of the arc-shaped protrusion 21 smoothly transitions to the pipe wall 26 of the pipe body 2, and a step 23 is formed between the upper side of the arc-shaped protrusion 21 and the pipe wall 26. When the gas-liquid mixture rises, the smooth transition between the arc-shaped protrusion 21 and the pipe wall 26 reduces the resistance to the flow of the gas-liquid mixture. When the upward force provided by the compressed air is insufficient, and the gas-liquid mixture flows back along the pipe wall 26, interference occurs between the gas-liquid mixture and the step 23, and the step 23 hinders the backflow of the gas-liquid mixture. The reduction of gas-liquid mixture backflow improves the oxygen supply efficiency of the airlift aerator. The abrupt change in flow area at step 23 creates a low-pressure vortex, specifically a vortex zone 22 between the arc-shaped protrusion 21 and the pipe wall 26 at step 23. This vortex zone 22 prevents localized stagnation on the pipe wall 26, ensuring the flow velocity of the gas-liquid mixture within the pipe body 2. At least two arc-shaped protrusions 21 are evenly arranged in a row around the axis of the pipe body 2 on the same horizontal plane. At least two rows of arc-shaped protrusions 21 are arranged on the pipe wall 26 along the axis of the pipe body 2, with adjacent rows staggered. The continuous and uniform arrangement of the arc-shaped protrusions 21 reduces turbulence and resistance to the gas-liquid mixture, facilitating its upward movement and ensuring the oxygen supply efficiency of the airlift aerator.

[0026] Preferably, the air inlet pipe 3 is connected to the pipe body 2 along the outer cylindrical surface of the pipe body 2. This ensures that the compressed air ejected from the air inlet pipe 3 is sprayed upwards into the water body along the pipe body 2, allowing the compressed air to carry away the sludge and other impurities that have accumulated at the position of the pool body aligned with the pipe body 2.

[0027] Figure 4 The diagram shows a top-view schematic of the arc-shaped protrusion in an airlift aerator according to an embodiment of this disclosure. Please refer to... Figure 2 , Figure 3 and Figure 4Around the axis of the pipe body 2, the thickness of the arc-shaped protrusion 21 gradually decreases in a clockwise or counterclockwise direction. When the gas-liquid mixture flows along the outer surface 24 of the arc-shaped protrusion 21, the outer surface 24 provides the gas-liquid mixture with forces in both axial and radial directions. The axial component continues to propel the gas-liquid mixture along the axis of the pipe body 2; the radial component propels the gas-liquid mixture to rotate around the axis of the pipe body 2 along the pipe wall 26, thereby driving the rising gas-liquid mixture within the pipe body 2 to spiral upwards. The centrifugal force generated by the spiral upward movement of the gas-liquid mixture can partially offset the gravity of the gas-liquid mixture, ensuring that the gas-liquid mixture flows upwards into the water body along the pipe body 2, thus guaranteeing the oxygen supply efficiency of the airlift aerator.

[0028] Preferably, the cross-section of the step 23 along the axial direction of the pipe body 2 is arc-shaped. Specifically, a V-shaped or W-shaped guide groove 25 is formed between adjacent arc protrusions. The arc-shaped step 23 avoids abrupt changes in the flow direction of the gas-liquid mixture when it flows along the guide groove 25, thereby reducing the resistance encountered by the gas-liquid mixture when it flows along the guide groove 25.

[0029] Please refer to Figure 2 and Figure 3 Along the axis of pipe 2, the diameter of pipe 2 gradually increases. Since flow velocity = flow rate / cross-sectional area, when the diameter of pipe 2 decreases, the flow velocity of the gas-liquid mixture from the bottom to the top of pipe 2 will decrease, thus prolonging the oxygen dissolution efficiency within pipe 2. At the same time, the gradual increase in the diameter of pipe 2 allows the gas-liquid mixture within pipe 2 to flow more smoothly into the water tank, avoiding sudden changes in the flow velocity of the gas-liquid mixture, thereby reducing turbulence and pressure drop.

[0030] In some embodiments, the surface of the arcuate protrusion 21 away from the pipe wall 26 is the outer facade 24. The angle between the pipe wall 26 and the axis of the pipe body 2 is greater than or equal to the angle between the outer facade 24 and the pipe wall 26. That is, the inclination of the pipe wall 26 offsets the inclination angle of the outer facade 24 of the arcuate protrusion, thus preventing the outer facade 24 of the arcuate protrusion from reducing the cross-sectional area inside the pipe body 2 and hindering the flow of the gas-liquid mixture.

[0031] In other embodiments, the angle between the pipe wall 26 of the pipe body 2 and the axis of the pipe body 2 is less than the angle between the outer surface 24 and the pipe wall 26. In this case, the arc-shaped convex outer surface 24 can provide greater radial separation to propel the gas-liquid mixture spirally upward within the pipe body 2.

[0032] Please refer to Figure 1 An upper flare 1 is provided at the upper end of the pipe body 2. The diameter of the upper flare 1 gradually increases along the axis of the pipe body 2. The upper flare 1 allows the gas-liquid mixture in the pipe body 2 to flow more smoothly into the water pool, avoiding sudden changes in the flow velocity of the gas-liquid mixture, thereby reducing turbulence and pressure drop.

[0033] Preferably, a flared opening 4 is provided at the lower end of the pipe body 2. The diameter of the flared opening 4 gradually increases downwards along the axis of the pipe body 2. This allows for the covering of a larger area of ​​the pool, enabling more extensive collection and agitation of sludge at the bottom of the pool, and preventing sludge accumulation at the bottom. The larger diameter of the flared opening 4 also reduces the probability of clogging.

[0034] The specific workflow of this utility model is as follows: The operator places the entire airlift aerator vertically at the bottom of the pool. The compressed air source is activated, and compressed air is injected into the pipe 2 through the air inlet pipe 3. Under the influence of buoyancy, the compressed air moves upward along the pipe 2, carrying the liquid and impurities at the lower flare 4 upward as well. As the gas-liquid mixture moves upward along the outer surface 24 of the arc-shaped protrusion 21, the outer surface 24 provides axial and radial forces to the gas-liquid mixture. The axial component continues to propel the gas-liquid mixture along the axis of the pipe 2; the radial component propels the gas-liquid mixture to rotate around the axis of the pipe 2 along the pipe wall 26, thus driving the rising gas-liquid mixture within the pipe 2 to spiral upward. When the upward force provided by the compressed air is insufficient, and the gas-liquid mixture flows back along the pipe wall 26, interference occurs between the gas-liquid mixture and the step 23, with the step 23 hindering the backflow of the gas-liquid mixture.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas lift aerator, characterized by, The airlift aerator includes a vertically arranged tube and an air inlet pipe connected to the tube; the air inlet pipe is located near the bottom of the tube; an arc-shaped protrusion is provided on the tube wall; the thickness of the arc-shaped protrusion gradually increases vertically upwards; the lower side of the arc-shaped protrusion smoothly transitions with the tube wall, and a step is formed between the upper side of the arc-shaped protrusion and the tube wall; at least two arc-shaped protrusions are evenly arranged in a row around the axis of the tube in the same horizontal plane; at least two rows of arc-shaped protrusions are provided on the tube wall along the axis of the tube, and adjacent rows of arc-shaped protrusions are staggered.

2. The gas-lift aerator of claim 1, wherein: Around the axis of the tube, in a clockwise or counterclockwise direction, the thickness of the arc-shaped protrusion gradually decreases.

3. The gas-lift aerator of claim 1, wherein: Along the axial direction of the tube, the cross-section of the step is circular arc-shaped.

4. The gas-lift aerator of claim 1, wherein: As the tube body moves upward along its axis, the diameter of the tube body gradually increases.

5. The airlift aerator as described in claim 4, characterized in that: The surface of the arc-shaped protrusion away from the pipe wall is the outer facade; the angle between the pipe wall and the axis of the pipe body is greater than or equal to the angle between the outer facade and the pipe wall.

6. The airlift aerator as described in claim 4, characterized in that: The surface of the arc-shaped protrusion away from the pipe wall is the outer facade; the angle between the pipe wall and the axis of the pipe body is less than the angle between the outer facade and the pipe wall.

7. The gas-lift aerator of claim 1, wherein: The upper end of the tube is provided with an upper flare; the diameter of the upper flare gradually increases along the axis of the tube upward.

8. The gas-lift aerator of claim 1, wherein: The lower end of the tube is provided with a flared opening; the diameter of the flared opening gradually increases downward along the axis of the tube.

9. The gas-lift aerator of claim 1, wherein: The intake pipe connects to the pipe body along the outer cylindrical surface of the pipe body.

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