Novel aeration structure suitable for high sludge concentration and MBR (Membrane Bioreactor) membrane frame

Abstract

The utility model relates to a novel aeration structure and MBR membrane frame suitable for high sludge concentration, the novel aeration structure comprises a ventilation part and a gas distribution part, the ventilation part comprises a main gas pipe and a plurality of gas distribution pipes, the plurality of gas distribution pipes are arranged along the axial direction of the main gas pipe, and the gas distribution pipes are communicated with the main gas pipe; the gas distributing part comprises a plurality of gas distributing rings, at least two layers of gas distributing rings are arranged in the axial direction of the main gas pipe, each gas distributing ring comprises a plurality of gas distributing columns, the gas distributing columns are arranged in the circumferential direction of the inner wall of the gas distributing pipe to form the gas distributing rings, and the ends, away from the inner wall of the gas distributing pipe, of the gas distributing columns are cones. The aeration structure disclosed by the utility model is stronger in stirring performance on high-concentration sludge and better in effect. And secondly, the aeration structure generates few bubbles, the service area is large, the opportunity that the aeration terminal structure is exposed in sludge for a long time is reduced, and sludge blockage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment biological treatment method, in particular to a new aeration structure and MBR membrane frame suitable for high sludge concentration. Background Art

[0002] MBR is an efficient combination of membrane separation technology and biological treatment, used to replace the secondary sedimentation tank in the activated sludge method; the membrane frame for placing the MBR membrane curtain is composed of columns, beams, water inlet pipes, aeration pipes and other parts. The aeration pipe is responsible for carrying the high-speed air medium produced by the blower from the starting end of the aeration pipe during the operation of the membrane assembly, and releasing the air medium to the end structure of the aeration pipe, which maintains the mixing and stirring state of the activated sludge in the membrane pool, ensures the uniform distribution of microorganisms and waste particles in the wastewater, and improves the ventilation performance of the membrane. At the same time, it can also increase the oxygen transfer efficiency, promote the growth and metabolism of microorganisms (thereby accelerating the degradation and removal of organic matter). Through aeration, the MBR system can treat wastewater more efficiently, improve treatment efficiency and water quality.

[0003] In the prior art, the end of the MBR aeration pipe adopts micropores with an outer diameter of 4 to 6 mm. The air is eventually released from the micropores to form many tiny bubbles, which increases the contact area between the bubbles and the water body. The small bubbles have a small density and a large buoyancy, and stay in the water body for a long time, thereby achieving the effect of increasing the oxygen transfer efficiency and stirring the water body. However, the aeration method of the microporous structure is not suitable for water bodies with high sludge concentrations. The diameter of the micropores is small, and the sludge particles are easily blocked at the micropore mouth, causing the micropores to lose permeability. The more micropores there are, the greater the possibility of blockage. Since the micropores are usually distributed on a large area of ​​filter materials, the more micropores there are. Once there is sludge blocking, it will affect the normal operation of the entire filtration system. The organic matter in the sludge is easy to adhere to the surface of the micropores. The sludge contains a large amount of organic matter, which is easy to adhere to the surface of the micropores to form dirt, which in turn causes the micropores to be blocked. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the aeration pipe structure in the prior art that micropores are easily blocked in high-sludge water bodies.

[0005] In order to solve the above technical problems, the utility model provides a new aeration structure suitable for high sludge concentration, including:

[0006] A ventilation part, the ventilation part comprises a main air pipe and a plurality of branch air pipes, the plurality of branch air pipes are arranged axially along the main air pipe, and the branch air pipes are connected to the main air pipe;

[0007] The air dividing part includes a plurality of air dividing rings, at least two layers of the air dividing rings are arranged axially along the main air pipe, the air dividing ring includes a plurality of air dividing columns, and the plurality of air dividing columns are arranged circumferentially along the inner wall of the air dividing pipe to form the air dividing ring, and the end of the air dividing column away from the inner wall of the air dividing pipe is a cone.

[0008] In one embodiment of the utility model, one end of the main air pipe is an air inlet, and the other end of the main air pipe is provided with a plug.

[0009] In one embodiment of the present invention, the axial direction of the sub-gas pipe is perpendicular to the axial direction of the main gas pipe.

[0010] In one embodiment of the present invention, a plurality of the gas dividing rings are equidistantly arranged along the inner wall of the gas dividing pipe, and the angle between the axes of any two adjacent gas dividing columns is 60°.

[0011] In one embodiment of the present invention, any two adjacent gas splitters rotate around the axis of the gas splitter pipe, so that any two adjacent gas splitter rings are staggered along the axis of the gas splitter pipe.

[0012] In one embodiment of the present invention, one end of the gas distribution column away from the gas distribution pipe is a polygonal pyramid.

[0013] In one embodiment of the present invention, one end of the gas distribution column away from the gas distribution pipe is a cone.

[0014] In one embodiment of the utility model, the main air pipe is provided with a plurality of installation openings along the axial direction for matching with the branch air pipes.

[0015] An MBR membrane frame comprises the novel aeration structure suitable for high sludge concentration, and also comprises a support frame, a plurality of main air pipes are installed at the bottom of the support frame, and one end of the air distribution pipe faces the bottom of the support frame.

[0016] In one embodiment of the utility model, an air pump is provided on the support frame, and the air pump is communicated with the interior of the main air pipe.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The utility model discloses a new aeration structure and MBR membrane frame suitable for high sludge concentration. The aeration structure is that when high-speed air passes through the aeration terminal structure, it is cut by the air separation column to form bubbles. The bubbles are much larger than the diameter of the micropores in the microporous filtration system, and have stronger stirring performance and better effect on high-concentration sludge. Secondly, the aeration structure produces a small number of bubbles and a large service area. Even if part of the terminal structure is blocked, it will not seriously affect the overall aeration effect. Finally, the bubbles produced by the new aeration have strong buoyancy and mobility, can quickly rise to the water surface and burst, and are difficult to be adhered to and accumulated by sludge, which reduces the chance of the aeration terminal structure being exposed to sludge for a long time and avoids sludge blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0020] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the gas distribution pipe in FIG.

[0022] Figure 3 for Figure 2 Axial section view of the median trachea;

[0023] Figure 4 for Figure 3 Radial section view at AA;

[0024] Figure 5 for Figure 1 Front view of the middle trachea;

[0025] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0026] Explanation of the reference numerals in the drawings in the specification: 1. ventilation part; 2. air distribution part; 3. support frame; 4. air pump; 11. main air pipe; 12. air distribution pipe; 21. air distribution ring; 111. air inlet; 112. plug; 113. installation port; 211. air distribution column. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] Embodiment 1

[0029] Reference Figure 1-Figure 5As shown, the utility model discloses a new aeration structure suitable for high sludge concentration, comprising:

[0030] A ventilation part 1, the ventilation part 1 comprises a main air pipe 11 and a plurality of branch air pipes 12, the plurality of branch air pipes 12 are arranged axially along the main air pipe 11, and the branch air pipes 12 are communicated with the main air pipe 11;

[0031] The air distribution part 2 includes a plurality of air distribution rings 21, at least two layers of the air distribution rings 21 are arranged along the axial direction of the main air pipe 11, such as Figure 4 As shown, in the radial cross-sectional view of the air dividing pipe (the structure of an air dividing ring), the air dividing ring 21 includes a plurality of air dividing columns 211, and the plurality of air dividing columns 211 are circumferentially arranged along the inner wall of the air dividing pipe 12 to form the air dividing ring 21, and the end of the air dividing column 211 away from the inner wall of the air dividing pipe 12 is a cone.

[0032] It can be seen that in the present invention, multiple branch air pipes 12 are arranged axially along the main air pipe 11, and each branch air pipe 12 is connected to the main air pipe 11. The gas enters from the main air pipe 11 and then is ejected from the branch air pipe 12. Secondly, compared with the method of opening microholes on the main air pipe 11 in the prior art, the branch air pipe 12 has a larger aperture.

[0033] The gas distribution pipe 12 is used as a support for installing the gas distribution ring 21. The gas distribution ring 21 is composed of multiple gas distribution columns 211. The multiple gas distribution columns 211 are arranged along the inner wall of the gas distribution pipe 12. When the gas is ejected from the gas distribution pipe 12, the gas will be divided by the multiple gas distribution columns 211 when passing through the gas distribution columns 211. When the gas passes through the gas distribution columns 211, it will be cut by a special structure to form bubbles with a diameter of 1 to 3 mm, which is much larger than the diameter of the micropores in the microporous filtration system, and has stronger stirring performance and better effect on high-concentration sludge. Secondly, the end of each gas distribution column 211 adopts a cone, which can achieve rapid separation of the gas and reduce the number of bubbles.

[0034] The aeration structure in the utility model is that when high-speed air passes through the aeration terminal structure, it is cut by the air separation column 211 to form bubbles, which are much larger than the diameter of the micropores in the microporous filtration system, and have stronger stirring performance and better effect on high-concentration sludge. Secondly, the number of bubbles generated by the aeration structure is small and the service area is large. Even if part of the terminal structure is blocked, it will not seriously affect the overall aeration effect. Finally, the bubbles generated by the new aeration have strong buoyancy and mobility, can quickly rise to the water surface and burst, and are difficult to be adhered to and accumulated by sludge, which reduces the chance of the aeration terminal structure being exposed to sludge for a long time and avoids sludge blockage.

[0035] Furthermore, one end of the main air pipe 11 is an air inlet 111, and the other end of the main air pipe 11 is provided with a plug 112. Specifically, in the actual working process, compressed air enters the main air pipe 11 from the air inlet 111 of the main air pipe 11, and since the other end of the main air pipe 11 is blocked by the plug 112, the gas will enter each branch air pipe 12.

[0036] Furthermore, as a preferred solution of the present invention, the axial direction of the gas branch pipe 12 is perpendicular to the axial direction of the main gas pipe 11 .

[0037] Specifically, multiple branch pipes 12 are vertically connected to the main air pipe 11, which can ensure the stability of the connection on the one hand, and ensure uniform distribution of flow on the other hand, so that the amount of air reaching each branch pipe is consistent, avoiding sludge blockage caused by uneven flow.

[0038] Furthermore, the main air pipe 11 is provided with a plurality of installation openings 113 along the axial direction to cooperate with the branch air pipes 12 .

[0039] Specifically, during the actual installation process, a plurality of installation openings 113 are opened axially on the surface of the main air pipe 11, and then the sub-air pipe 12 is aligned with the installation openings 113. In the present utility model, the sub-air pipe 12 and the main air pipe 11 are fixed by welding.

[0040] Furthermore, the plurality of gas dividing rings 21 are equidistantly arranged along the inner wall of the gas dividing pipe 12 , and the angle between the axes of any two adjacent gas dividing columns 211 is 60°.

[0041] As a preferred embodiment of the present invention, the air dividing ring 21 in the present invention includes six air dividing columns 211 equidistantly distributed circumferentially, and the angle between the axes of any two adjacent air dividing columns 211 is 60°. The flow rate of the separated airflow is controlled by controlling the spacing between the air dividing columns 211.

[0042] Furthermore, any two adjacent air dividing rings 21 rotate around the axis of the air dividing pipe 12, so that any two air dividing rings 21 are staggered along the axis of the air dividing pipe.

[0043] Specifically, in the present invention, any two adjacent air dividing rings 21 rotate 30° around the axis of the air dividing pipe 12, that is, when the gas passes through the air dividing pipe 12, from the cross section of the air dividing pipe 12, there is an air dividing column 211 every 30°. An appropriate number of air dividing columns 211 can ensure the air flow speed through the air dividing columns 211, and bubbles of appropriate size can be generated when the air flow passes through the air dividing columns 211. If the air dividing columns 211 are too densely distributed, the number of bubbles will be too large or too small, resulting in blockage of the aeration structure.

[0044] Furthermore, one end of the gas distribution column 211 away from the gas distribution pipe 12 is a polygonal pyramid.

[0045] Specifically, as a preferred solution of the present invention, the end of the gas column 211 in the present invention away from the inner wall of the gas distribution pipe 12 is a quadrangular pyramid. As other preferred solutions, it can also be a triangular pyramid or other multi-sided pyramid. When the airflow passes through the multi-sided pyramid, bubbles are generated while changing the flow rate.

[0046] As a preferred solution of the present invention, the end of the gas distribution column 211 away from the gas distribution pipe 12 is a cone.

[0047] Specifically, the end of the gas distribution column 211 away from the inner wall of the gas distribution pipe 12 can be a cone in addition to a polygonal pyramid, which can make the air flow smoother and ensure the stability of the flow rate. However, the amount of bubbles generated will be lower than that of the polygonal pyramid structure.

[0048] The above two structures can be selected to correspond to the structure of the gas distribution column 211 according to actual conditions, so as to control the size and number of bubbles while ensuring the flow rate.

[0049] Embodiment 2

[0050] Reference Figure 6 As shown, an MBR membrane frame includes the new aeration structure suitable for high sludge concentration described in Example 1, and also includes a support frame 3, multiple main air pipes 11 are installed at the bottom of the support frame 3, and one end of the branch air pipe 12 faces the bottom of the support frame 3.

[0051] Furthermore, an air pump 4 is provided on the support frame 3 , and the air pump 4 is communicated with the interior of the main air pipe 11 .

[0052] Specifically, one end of the support frame 3 connected to the main air pipe 11 is a hollow structure, and the air pump 4 passes the air through the support frame 3 and finally into the main air pipe 11. It should be noted that in order to avoid blockage of the aeration structure to a greater extent, the air outlet of the air distribution pipe 12 is installed facing the bottom.

[0053] In summary, the utility model introduces a new aeration structure and MBR membrane frame suitable for high sludge concentration. The aeration structure in the utility model is that when high-speed air passes through the aeration terminal structure, it is cut by the air separation column 211 to form bubbles, which are much larger than the diameter of the micropores in the microporous filtration system, and have stronger stirring performance and better effect on high-concentration sludge. Secondly, the aeration structure produces a small number of bubbles and a large service area. Even if part of the terminal structure is blocked, it will not seriously affect the overall aeration effect. Finally, the bubbles produced by the new aeration have strong buoyancy and mobility, can quickly rise to the water surface and burst, and are difficult to be adhered to and accumulated by sludge, which reduces the chance of the aeration terminal structure being exposed to sludge for a long time and avoids sludge blockage.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A new aeration structure suitable for high sludge concentration, It is characterized in that include: A ventilation part, the ventilation part comprises a main air pipe and a plurality of branch air pipes, the plurality of branch air pipes are arranged axially along the main air pipe, and the branch air pipes are connected to the main air pipe; The air dividing part includes a plurality of air dividing rings, at least two layers of the air dividing rings are arranged axially along the main air pipe, the air dividing ring includes a plurality of air dividing columns, and the plurality of air dividing columns are arranged circumferentially along the inner wall of the air dividing pipe to form the air dividing ring, and the end of the air dividing column away from the inner wall of the air dividing pipe is a cone.

2. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: One end of the main air pipe is an air inlet, and the other end of the main air pipe is provided with a plug.

3. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: The axial direction of the gas distribution pipe is perpendicular to the axial direction of the main gas pipe.

4. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: The plurality of gas distribution rings are arranged equidistantly along the inner wall of the gas distribution pipe, and the angle between the axes of any two adjacent gas distribution columns is 60°.

5. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: Any two adjacent gas splitters rotate around the axis of the gas splitter pipe, so that any two adjacent gas splitter rings are staggered along the axis of the gas splitter pipe.

6. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: The end of the gas distribution column away from the gas distribution pipe is a polygonal pyramid.

7. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: The end of the gas distribution column away from the gas distribution pipe is cone-shaped.

8. The novel aeration structure suitable for high sludge concentration according to claim 1, Features: The main air pipe is provided with a plurality of installation openings along the axial direction to match with the branch air pipes.

9. An MBR membrane frame, comprising a novel aeration structure suitable for high sludge concentration as claimed in any one of claims 1 to 8, Features: It also includes a support frame, a plurality of main air pipes are installed at the bottom of the support frame, and one end of the air distribution pipe faces the bottom of the support frame.

10. The MBR membrane frame according to claim 9, Features: An air pump is arranged on the support frame, and the air pump is communicated with the interior of the main air pipe.

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