Multi-stage strong-cut spiral mixing aerator

Abstract

The utility model provides a kind of multistage strong cut cyclone mixing aerator, it is related to aerator field, including aerator body, the aerator body includes straight cylinder type flow guide cylinder and fixedly installed in the cyclone subassembly and air inlet pipe of flow guide cylinder inside, flow guide cylinder is two ends open type structure, the cyclone subassembly includes three helical blades sequentially arranged along flow guide cylinder axial direction, and adjacent two helical blades are connected and present rotation staggered arrangement;The air inlet pipe is fixed in the lower side of cyclone subassembly, air inlet pipe is connected to flow guide cylinder outside and is equipped with air inlet, located in the lower side of cyclone subassembly, air inlet pipe wall is equipped with the air outlet that with its inner cavity intercommunication, and air inlet pipe with the lower end port between flow guide cylinder of being equipped with air outlet leaves preset distance;The utility model passes through its internal structure design, so that its import does not need to design into micropore, both avoid the problem that micropore can cause easy to block, simultaneously can also obtain excellent aeration effect.

Description

Technical Field

[0001] This utility model relates to the field of aerator technology, specifically to a multi-stage strong swirl mixing aerator. Background Technology

[0002] Tubular aerators are common aeration devices in aeration tanks. They introduce air into the aerator to provide oxygen to the activated sludge in the aeration tank, allowing aerobic microorganisms to degrade organic matter in the wastewater in the presence of oxygen.

[0003] In the past, the tubular aerators commonly used in industry were mostly double-spiral blower aerators disclosed in patent document CN2192619Y. However, they had the drawback of small aeration volume. Therefore, this type of aerator was gradually replaced by the microporous aerator that is now widely used. However, the air distribution pores of traditional microporous aerators are in the micrometer range, which makes them easy to clog, thus affecting the aeration effect and requiring more frequent maintenance. Utility Model Content

[0004] This utility model addresses the aforementioned problems in the prior art by providing a multi-stage strong tangential vortex mixing aerator. Based on the internal structure of this specially designed multi-stage strong tangential vortex mixing aerator, its inlet is not designed with a microporous structure, which avoids the problem of easy clogging that microporous structures may cause, while also achieving excellent aeration effect.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a multi-stage strong shear vortex mixing aerator, characterized in that it includes an aerator body, the aerator body includes a straight cylindrical guide tube and a vortex assembly and an air inlet pipe fixedly installed inside the guide tube, the guide tube is an open structure at both ends, the vortex assembly includes three spiral blades arranged sequentially along the axial direction of the guide tube, adjacent spiral blades are connected end to end and arranged in a rotating staggered manner; the air inlet pipe is fixed to the lower side of the vortex assembly, the air inlet pipe is connected to the outside of the guide tube and has an air inlet, an air outlet is provided on the wall of the air inlet pipe located on the lower side of the vortex assembly and communicating with its inner cavity, and a preset distance is left between the air inlet pipe with the air outlet and the lower port of the guide tube.

[0006] Furthermore, the air intake pipe penetrates the side wall of the guide tube and extends outward.

[0007] Furthermore, the air outlet faces a downward angle, preferably at 45° downward, that is, the direction of the air outlet forms a 45° angle with the axis of the air inlet pipe.

[0008] Furthermore, the air outlet is provided in multiple locations, and the air outlet is located at a position other than the bottom wall of the air inlet pipe.

[0009] Furthermore, the helical angle of each helical blade from bottom to top is 180°.

[0010] Furthermore, the three helical blades are arranged from bottom to top as a first helical blade, a second helical blade, and a third helical blade. The second helical blade rotates and intersects with the first helical blade around the axis of the guide tube by 90°, and the third helical blade rotates and intersects with the second helical blade around the axis of the guide tube by 90°.

[0011] Furthermore, the guide tube is provided with support frames fixed to its outer wall on both sides, the top of the swirl assembly is fixed with a connecting strip, the top spiral blades are fixedly connected to the support frame through the connecting strip, and the bottom of the support frame is bent to form a support base.

[0012] The beneficial effects of this utility model are as follows: This utility model uses an aerator body mainly composed of a guide tube, a swirl component, and an air inlet pipe. In particular, the swirl component is composed of three spiral blades, with adjacent spiral blades connected end to end and arranged in a rotating staggered manner. It is equipped with an air outlet designed in a downward direction to connect to the air inlet pipe. The mud-water-air mixture in the pool flows in a high-speed ring around the aerator as the aeration center, washing over the bottom and walls of the pool, realizing the longitudinal mixing of the sewage pool. While ensuring its aeration effect, it also avoids the use of microporous structures and avoids the problem of sludge clogging the pores. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the aerator body according to an embodiment of the present invention (excluding the support frame); Figure 2 This is a cross-sectional structural schematic diagram of the aerator body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the intake pipe and guide tube in a downward view according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a cyclone assembly according to an embodiment of the present invention; In the diagram: 1. Guide tube, 2. Swirl assembly, 3. Inlet pipe, 31. Outlet, 32. Limiting post, 4. First spiral blade, 5. Second spiral blade, 6. Third spiral blade, 7. Support frame, 8. Connecting strip, 9. Support base. Detailed Implementation

[0014] The principles and features of this utility model are described below. The embodiments given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0015] As shown in the attached figure, the multi-stage strong swirl mixing aerator of this embodiment is specifically a three-stage strong swirl mixing aerator, which includes an aerator body. The aerator body includes a straight cylindrical guide tube 1 and a swirl assembly 2 and an air inlet pipe 3 fixedly installed inside the guide tube 1. The guide tube 1 has an open structure at both ends, with the bottom being the inlet and the top being the outlet. In this embodiment, the diameter of the guide tube 1 is approximately 10cm.

[0016] The swirl assembly 2 includes three identical spiral blades arranged sequentially along the axial direction of the guide tube 1. The rotation trajectory of the swirl assembly is adapted to the inner diameter of the guide tube. The spiral angle of each spiral blade from bottom to top is 180°. The three spiral blades are arranged from bottom to top as the first spiral blade 4, the second spiral blade 5, and the third spiral blade 6. Adjacent spiral blades are connected end to end and arranged in a rotating staggered manner. Specifically, the second spiral blade 5 is rotated and staggered by 90° relative to the first spiral blade 4 around the axis of the guide tube 1, and the third spiral blade 6 is rotated and staggered by 90° relative to the second spiral blade 5 around the axis of the guide tube 1.

[0017] The air inlet pipe 3 is fixed to the lower side of the vortex assembly 2. The air inlet pipe 3 penetrates the side wall of the guide tube 1 and extends outward to the outside of the guide tube 1. Its air inlet is located outside the guide tube 1. The air outlet 31, which communicates with the inner cavity of the air inlet pipe 3, is provided on the lower side of the vortex assembly 2 and on the pipe wall. In this embodiment, there are two sets of air outlets 31 arranged along the axial direction of the air inlet pipe 3. Each set has two outlets, and they are all located on the side wall of the air inlet pipe 3, which is not at the bottom wall position. Each outlet is staggered and located at a 45° downward angle, that is, the direction of the outlet 31 is at a 45° angle with the axial direction of the air inlet pipe 3. A preset distance is left between the air inlet pipe 3 with the outlet 31 and the lower port of the guide tube 1. The space located at the bottom of the guide tube 1 and below the air inlet pipe 3 is used as the initial mixing area of ​​the air-sludge.

[0018] In a preferred embodiment of this utility model, in order to facilitate the processing and quick installation of the aerator body 100, support frames 7 fixed to the outer wall of the guide tube 1 are provided on both sides. A connecting strip 8 is fixed to the top of the swirl assembly 2. The spiral blades at the top are fixedly connected to the support frame 7 through the connecting strip 8. Specifically, the connecting strip 8 is U-shaped, and its bottom edge is fixedly connected to the top of the third spiral blade 6 by bolts. Its two sides are fixed to the support frames 7 located on both sides of the aerator body 100 by bolts. The bottom of the support frame 7 is bent to form a support base 9, and the support base 9 is lower than the bottom inlet of the guide tube 1.

[0019] When using the aerator body 100 of this invention for aeration treatment, the aerator body 100 is placed at the bottom of the biological treatment tank. After aeration is started, gas is ejected through the air inlet pipe 3 and the air outlet 31, creating a corresponding negative pressure zone at the bottom of the guide tube. This draws in the mud-water mixture from the bottom of the tank. The gas and mud-water mixture are initially mixed in the gas-sludge initial mixing zone, and then pass through three stages of 180° spiral blade flow shearing. The adjacent spiral blades are connected end to end and arranged in a 90° rotational staggered pattern, forming a strong mixing and stirring shearing. The mud-water-gas mixture in the tank flows in a high-speed ring around the aerator as the aeration center, scouring the bottom and walls of the tank, thus achieving longitudinal mixing of the sewage tank. In this embodiment, the inlet diameter at the bottom of the guide tube 1 is 10cm or even larger. Compared with the microporous aerators with micron-level air distribution holes in the prior art, this solves the problem of sludge clogging the holes. It can realize the longitudinal N-times vertical circulation mixing of sludge, water and air in the sewage tank. The service area of ​​a single aerator can reach more than 10 square meters, and its oxygen transfer efficiency can reach 20% or even more than 30%. It provides extremely stable oxygen supply conditions for the stable operation of the sewage treatment system. The dynamic resistance loss of the aerator is less than 5KPA, and the energy consumption is low.

[0020] For the treatment of toxic and harmful high-concentration wastewater, severe foam accumulation often forms on the surface of the biological treatment tank. Sometimes, it is necessary to add defoaming agents to defoam and maintain the operation of the system. The aerator in this embodiment, with its unique structure and the above-mentioned working principle, forms an aeration center. At the aeration center, the foam in the aeration tank is sheared and forced to break during the strong water flow impact and high-speed circular flow, which reduces foam accumulation and reduces the use of defoaming agents.

Claims

1. A multi-stage high-intensity swirl mixing aerator, characterized in that, The aerator body consists of a straight cylindrical guide tube (1) and a swirl assembly (2) and an air inlet pipe (3) fixedly installed inside the guide tube (1). The guide tube (1) has an open structure at both ends. The swirl assembly (2) consists of three spiral blades arranged sequentially along the axial direction of the guide tube (1). The two adjacent spiral blades are connected end to end and arranged in a rotating staggered manner. The air inlet pipe (3) is fixed to the lower side of the swirl assembly (2). The air inlet pipe (3) extends through and connects to the outside of the guide tube (1) and has an air inlet. An air outlet (31) communicating with its inner cavity is provided on the wall of the air inlet pipe (3) located on the lower side of the swirl assembly (2). A preset distance is left between the air inlet pipe (3) with the air outlet (31) and the lower end of the guide tube (1). The guide tube (1) is provided with support frames (7) fixed to its outer wall on both sides, and the top of the swirl assembly (2) is fixed with a connecting strip (8), and the top spiral blades are fixedly connected to the support frame (7) through the connecting strip (8). The bottom of the support frame (7) is bent to form a support base (9), and the support base (9) is lower than the bottom inlet of the guide tube (1).

2. The multi-stage strong tangential vortex mixing aerator according to claim 1, characterized in that, The air intake pipe (3) penetrates the side wall of the guide tube (1) and extends outward.

3. The multi-stage strong swirl mixing aerator according to claim 1, characterized in that, The air outlet (31) faces downwards.

4. The multi-stage strong tangential vortex mixing aerator according to claim 3, characterized in that, The direction of the air outlet (31) is at a 45° angle to the axial direction of the air inlet pipe (3).

5. The multi-stage strong swirl mixing aerator according to claim 1, 3, or 4, characterized in that, The air outlet (31) is provided with multiple outlets.

6. The multi-stage strong swirl mixing aerator according to claim 1, 3, or 4, characterized in that, The air outlet (31) is located on the non-bottom wall position of the air inlet pipe (3).

7. The multi-stage strong tangential vortex mixing aerator according to claim 1, characterized in that, Each helical blade has a helical angle of 180° from bottom to top.

8. The multi-stage strong tangential vortex mixing aerator according to claim 7, characterized in that, The three helical blades are, from bottom to top, the first helical blade (4), the second helical blade (5), and the third helical blade (6). The second helical blade (5) rotates and intersects with the first helical blade (4) around the axis of the guide tube (1) by 90°. The third helical blade (6) rotates and intersects with the second helical blade (5) around the axis of the guide tube (1) by 90°.

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