Aeration mechanism

Abstract

The utility model provides an aeration mechanism which comprises a closed aeration box body, a plurality of partition plates are arranged in the aeration box body, the space in the aeration box body is divided into a plurality of normal aeration cavities and a plurality of intermittent aeration cavities by the partition plates, and the normal aeration cavities and the intermittent aeration cavities are sequentially arranged at intervals; a normal aeration pipe is arranged in the normal aeration cavity, and an intermittent aeration pipe is arranged in the intermittent aeration cavity; the normal aeration pipe is a vertically arranged straight pipe, the top of the normal aeration pipe is a normal air outlet, the bottom of the normal aeration pipe is a normal air inlet, and the normal air outlet penetrates out of the top of the aeration box body; the intermittent aeration pipe is a vertically arranged U-shaped pipe with unequal height, the high end of the intermittent aeration pipe is an intermittent air outlet, the other end of the intermittent aeration pipe is an intermittent air inlet, and the intermittent air outlet penetrates out of the top of the aeration box body. According to the aeration mechanism, the normal aeration pipe, the normal aeration cavity, the intermittent aeration pipe and the intermittent aeration cavity are reasonably arranged, so that the equipment cost is not increased, and normal aeration and intermittent aeration are realized at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of membrane bioreactors, in particular to an aeration mechanism. Background Art

[0002] The submerged membrane bioreactor (MBR) is an organic combination of membrane separation technology and biotechnology. It uses ultrafiltration or microfiltration membrane separation technology to replace the secondary sedimentation tank and conventional filtration units of the traditional activated sludge process, completely separating the hydraulic retention time (HRT) and sludge age (STR). This is an efficient and economical wastewater resource utilization technology with high solid-liquid separation capabilities. Not only does it have good effluent quality, with suspended solids and turbidity close to zero, but it can also intercept biological pollutants such as E. coli. Furthermore, because the effluent quality is significantly better than that of traditional wastewater treatment processes, the treated water can be directly reused, showing broad application prospects.

[0003] The membrane module is the core component of the submerged membrane bioreactor (MBR). Its reliable stability directly determines the application effect of the MBR. The membrane element is the water-producing component of the membrane module and is a key component of the membrane module. The performance of the membrane element directly determines the performance of the membrane module. During the water production process, impurities in the wastewater adhere to the membrane surface, affecting water production performance. Therefore, aeration is required to scrub the membrane surface to reduce impurity adhesion.

[0004] Existing aeration devices usually adopt constant aeration or intermittent aeration. Long-term constant aeration will make the aeration reach a dynamic equilibrium, and the membrane elements will gradually be contaminated in the later period. When all the air holes of intermittent aeration stop aeration, the continued use of the membrane will cause irreversible membrane pollution. Even if intermittent aeration is performed later, it is difficult to restore the membrane performance. Simply superimposing the mechanisms that produce constant aeration and intermittent aeration will increase equipment costs and occupy a large space.

[0005] Therefore, it is necessary to provide an aeration mechanism to solve or at least partially solve the above problems. Utility Model Content

[0006] The utility model provides an aeration mechanism, which realizes both constant aeration and intermittent aeration without increasing equipment cost through reasonable arrangement of a constant aeration pipe, a constant aeration cavity, an intermittent aeration pipe and an intermittent aeration cavity.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] An aeration mechanism, comprising:

[0009] The invention comprises a closed aeration box body, wherein a plurality of partitions are provided in the aeration box body, wherein the plurality of partitions divide the space in the aeration box body into a plurality of constant aeration chambers and a plurality of intermittent aeration chambers, wherein the constant aeration chambers and the intermittent aeration chambers are arranged in sequence; a constant aeration pipe is provided in the constant aeration chamber, and an intermittent aeration pipe is provided in the intermittent aeration chamber; the constant aeration pipe is a vertically arranged straight pipe, the top of the constant aeration pipe is a constant air outlet, the bottom is a constant air inlet, and the constant air outlet passes through the top of the aeration box body; the intermittent aeration pipe is a vertically arranged U-shaped pipe of unequal height, the higher end of the intermittent aeration pipe is an intermittent air outlet, the other end is an intermittent air inlet, and the intermittent air outlet passes through the top of the aeration box body.

[0010] Optionally, the cross-sectional area of ​​the intermittent aeration chamber is larger than the cross-sectional area of ​​the constant aeration chamber.

[0011] Optionally, the intermittent air outlet is 30mm-80mm higher than the top of the aeration box body, the intermittent air inlet is 20mm-50mm lower than the top of the aeration box body, the distance between the intermittent air inlet and the bottom of the intermittent aeration pipe is 80mm-150mm; the diameter of the intermittent aeration pipe is 8mm-12mm.

[0012] Optionally, the height of the normal air outlet above the top of the aeration box body is 30mm-80mm, and the height of the normal air inlet below the top of the aeration box body is 80mm-120mm; the diameter of the normal aeration pipe is 6mm-12mm.

[0013] Optionally, the partition is provided with a communication hole near the bottom, and the communication hole connects the constant aeration chamber and the intermittent aeration chamber.

[0014] Optionally, the side walls of the plurality of intermittent aeration chambers are each provided with a penetrating aeration holes, the height of the aeration holes being lower than the bottom of the intermittent aeration tube and higher than the height of the connecting hole; there are a plurality of aeration holes, and the plurality of aeration holes are evenly spaced.

[0015] Optionally, the intermittent aeration pipe is arranged at a certain angle relative to the partition, and the angle ranges from 50° to 60°.

[0016] Optionally, a slope is provided on the top of the aeration box.

[0017] Optionally, fixing ears are provided at both ends of the aeration box body.

[0018] Optionally, the aeration box is made of stainless steel.

[0019] Compared with the prior art, the technical solution of the utility model has beneficial effects.

[0020] For example, the aeration mechanism provided by the present invention is provided with a constant aeration chamber and an intermittent aeration chamber in the aeration box body, and a vertical straight tube type constant aeration tube is provided in the constant aeration chamber to achieve continuous constant aeration maintaining a certain pressure; an intermittent aeration tube is provided in the intermittent aeration chamber, and the intermittent aeration tube adopts a U-shaped tube of unequal height, and intermittent aeration is achieved through the height difference between the two ends and the bottom end of the U-shaped tube; there is no need to add air supply pipelines and control valves, etc., to achieve the combination of constant aeration and intermittent aeration, and intermittent aeration breaks the dynamic balance of constant aeration to achieve the effect of scrubbing the membrane, and constant aeration can ensure the cleanliness of the membrane during the period when intermittent aeration stops aeration, thereby ensuring the cleaning effect of the membrane surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the aeration mechanism structure in an embodiment of the present utility model;

[0022] Figure 2 This is a side view of the aeration mechanism in the embodiment of the utility model;

[0023] Figure 3 This is a bottom view of the aeration mechanism in the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram showing the principle of intermittent aeration achieved by the intermittent aeration pipe in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 2. Aeration mechanism; 21. Aeration box; 22. Partition; 23. Constant aeration chamber; 24. Constant aeration pipe; 241. Constant air outlet; 242. Constant air inlet; 25. Intermittent aeration chamber; 251. Aeration hole; 26. Intermittent aeration pipe; 261. Intermittent air outlet; 262. Intermittent air inlet. DETAILED DESCRIPTION

[0027] In the prior art, aeration devices usually adopt constant aeration or intermittent aeration. Long-term constant aeration will cause the aeration to reach a dynamic equilibrium, and the membrane elements will gradually become contaminated in the later period. However, when all the air holes of intermittent aeration stop aeration, the continued use of the membrane will cause irreversible membrane contamination. Even if subsequent intermittent aeration is used, it is difficult to restore the membrane performance. Simply superimposing the mechanisms that produce constant aeration and intermittent aeration will increase equipment costs and occupy a large space.

[0028] To solve the above technical problems, the present invention provides an aeration mechanism that realizes both constant aeration and intermittent aeration without increasing equipment cost through the rational arrangement of constant aeration pipes, constant aeration chambers, intermittent aeration pipes, and intermittent aeration chambers.

[0029] To make the objectives, features, and beneficial effects of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described below are merely for the purpose of explaining the present invention and are not intended to limit the present invention. Furthermore, the drawings may use the same or similar reference numerals to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments, as well as the description of prior art elements, features, and effects, may be omitted.

[0030] Figure 1 This is a schematic diagram of the aeration mechanism structure in an embodiment of the present utility model; Figure 2 This is a side view of the aeration mechanism in the embodiment of the utility model; Figure 3 This is a bottom view of the aeration mechanism in the embodiment of the utility model; Figure 4 This is a schematic diagram showing the principle of intermittent aeration achieved by the intermittent aeration pipe in an embodiment of the utility model.

[0031] Reference Figure 1-Figure 4 , an embodiment of the utility model provides an aeration mechanism.

[0032] Specifically, the aeration mechanism 2 includes a closed aeration box body 21, in which a plurality of partitions 22 are provided. The plurality of partitions 22 divide the space inside the aeration box body 21 into a plurality of constant aeration chambers 23 and a plurality of intermittent aeration chambers 25, and the constant aeration chambers 23 and the intermittent aeration chambers 25 are arranged in sequence; a constant aeration pipe 24 is provided in the constant aeration chamber 23, and an intermittent aeration pipe 26 is provided in the intermittent aeration chamber 25; the constant aeration pipe 24 is a vertically arranged straight pipe, the top of the constant aeration pipe 24 is a constant air outlet 241, and the bottom is a constant air inlet 242, and the constant air outlet 241 passes through the top of the aeration box body 21 for constant aeration; the intermittent aeration pipe 26 is a vertically arranged U-shaped pipe of unequal height, the higher end of the intermittent aeration pipe 26 is an intermittent air outlet 261, and the other end is an intermittent air inlet 262, and the intermittent air outlet 261 passes through the top of the aeration box body 21 for intermittent aeration.

[0033] In a specific implementation, the aeration mechanism 2 is arranged in the aeration box, and the aeration box is placed in the sewage purification tank; the perforated air supply pipeline supplies air to the aeration mechanism 2; the aeration mechanism 2 allows water in the sewage purification tank to enter; when the aeration mechanism 2 is working normally, the liquid level in the constant aeration chamber 23 is lower than the air inlet of the constant aeration pipe 24, and continuous aeration at a certain pressure is maintained; aeration is carried out when the liquid level in the intermittent aeration chamber 25 rises from the bottom of the intermittent aeration pipe 26 to the intermittent air inlet 262, and aeration is stopped and air is replenished when the liquid level in the intermittent aeration chamber 25 drops from above the intermittent air inlet 262 to the bottom of the intermittent aeration pipe 26. Figure 4 As shown in , the dotted line represents the liquid level line, the upward arrow represents the change of the liquid level during the aeration process, and the downward arrow represents the change of the liquid level during the gas replenishment process.

[0034] In a specific implementation, the cross-sectional area of ​​the intermittent aeration chamber 25 is S1, the height difference between the intermittent air inlet 262 of the intermittent aeration pipe 26 and the bottom of the intermittent aeration pipe 26 is H, that is, the air supply height is H, then the air supply volume of the intermittent aeration chamber 25 is V1=S1*H, the air intake flow rate of the intermittent aeration chamber 25 is Q1, that is, the air supply flow rate is Q1, then the air supply time is

[0035] The cross-sectional area of ​​the intermittent aeration pipe 26 is S2, the aeration flow rate per unit area of ​​the intermittent aeration pipe 26 is Q2, the aeration time of the intermittent aeration pipe 26 is T2, and the aeration volume of the intermittent aeration pipe 26 during the aeration period is equal to the air supply volume plus the air intake volume during the aeration time, that is, the following relationship is satisfied:

[0036] S2*Q2*T2=V1+Q1*T2;

[0037] Substituting into the above formula:

[0038] S2*Q2*T2=S1*H+Q1*T2;

[0039] That is, the gas replenishment time T1 meets

[0040] That is, the aeration time T2 satisfies

[0041] When the structure of the intermittent aeration tube 26 is determined, the air supply time T1 and the aeration time T2 can be adjusted by adjusting the air inlet flow Q1 of the intermittent aeration chamber 25 , and the aeration time T2 can also be adjusted by adjusting the aeration flow Q2 per unit area of ​​the intermittent aeration tube 26 .

[0042] In a specific implementation, the cross-sectional area of ​​the constant aeration chamber 23 is smaller than the cross-sectional area of ​​the intermittent aeration chamber 25, and the diameter of the constant aeration pipe 24 is smaller than the diameter of the intermittent aeration pipe 26. When the gas flow rate entering the constant aeration chamber 23 and the intermittent aeration chamber 25 is the same, the liquid level in the constant aeration chamber 23 is maintained at a state lower than the air inlet of the constant aeration pipe 24, thereby achieving constant aeration; and the liquid level in the intermittent aeration chamber 25 rises from the bottom of the intermittent aeration pipe 26 to the intermittent air inlet 262 and falls from slightly above the intermittent air inlet 262 to the bottom of the intermittent aeration pipe 26 in a cycle, thereby automatically achieving intermittent aeration.

[0043] In some embodiments, the intermittent air outlet 261 is 30mm-80mm higher than the top of the aeration box body 21 to prevent sludge attached to the top of the aeration box body 21 from clogging the intermittent air outlet 261. The intermittent air inlet 262 is 20mm-50mm lower than the top of the aeration box body 21. The distance between the intermittent air inlet 262 and the bottom of the intermittent aeration pipe 26 is 80mm-150mm to ensure the aeration time during intermittent aeration and the gas pressure of intermittent aeration to ensure the impact force of intermittent aeration. The diameter of the intermittent aeration pipe 26 is 8mm-12mm, and the inner diameter is larger, so that the bubble diameter of the intermittent aeration is larger, so that large bubbles are suddenly generated during intermittent aeration, and the change in gas volume destroys the equilibrium state of the membrane surface pollution, thereby improving the scrubbing effect of intermittent aeration.

[0044] In some embodiments, the normal air outlet 241 is 30 mm to 80 mm higher than the top of the aeration box 21 to prevent sludge attached to the top of the aeration box 21 from clogging the normal air outlet 241. The normal air inlet 242 is 80 mm to 120 mm lower than the top of the aeration box 21. The diameter of the normal aeration pipe 24 is 6 mm to 12 mm, so that the outlet gas of the normal aeration maintains a certain pressure, maintains the bubble diameter of the normal aeration, and ensures that the membrane pollution is stable at a certain state under the normal aeration state.

[0045] In some embodiments, the partition 22 is provided with a connecting hole 221 near the bottom. The connecting hole 221 connects the normal aeration chamber 23 and the intermittent aeration chamber 25, allowing water to flow between the normal aeration chamber 23 and the intermittent aeration chamber 25, so that the overall pressure inside the normal aeration chamber 23 and the intermittent aeration chamber 25 is balanced.

[0046] In some embodiments, the side walls of the multiple intermittent aeration chambers 25 are all provided with penetrating aeration holes 251, the height of the aeration holes 251 is lower than the bottom of the intermittent aeration tube 26 and higher than the height of the connecting hole 221; there are multiple aeration holes 251, and the multiple aeration holes 251 are evenly spaced.

[0047] In a specific implementation, the diameter of the aeration hole 251 is 6mm-10mm, the lowest point of the aeration hole 251 is 2mm-5mm higher than the highest point of the connecting hole 221, and the highest point of the aeration hole 251 is 15mm-45mm lower than the lowest point of the intermittent aeration pipe 26. In normal use, it is ensured that the aeration hole 251 will not be aerated before the intermittent aeration pipe 26 is aerated. When the intermittent air outlet 261 of the intermittent aeration pipe 26 is blocked, aeration can be achieved through the aeration hole 251. Multiple aeration holes 251 are evenly spaced to ensure more uniform aeration and flushing of the membrane; in addition, when the normal air outlet 241 of the normal aeration pipe 24 is blocked, the gas in the normal aeration chamber 23 can enter the intermittent aeration chamber 25 through the connecting hole 221 and be aerated through the intermittent aeration pipe 26 or the aeration hole 251.

[0048] In some embodiments, a slope is provided on the top of the aeration box 21 to reduce the adhesion and accumulation of sludge on the top of the aeration box 21 .

[0049] In some embodiments, the intermittent aeration tube 26 is disposed at a certain angle relative to the partition 22, and the angle ranges from 50° to 60°.

[0050] In some embodiments, fixing ears are provided at both ends of the aeration box body 21 to facilitate fixing to the aeration tank.

[0051] In some embodiments, the aeration box 21 is made of stainless steel.

[0052] To sum up, the aeration mechanism provided by the utility model is that the aeration mechanism 2 is provided with a constant aeration chamber 23 and an intermittent aeration chamber 25 at intervals, and a vertical straight tube type constant aeration pipe 24 is provided in the constant aeration chamber 23 to achieve continuous constant aeration maintaining a certain pressure; an intermittent aeration pipe 26 is provided in the intermittent aeration chamber 25, and the intermittent aeration pipe 26 adopts a U-shaped pipe of unequal height, and intermittent aeration is achieved through the height difference between the two ends and the bottom end of the U-shaped pipe; there is no need to add air supply pipelines and control valves, etc., to achieve the combination of constant aeration and intermittent aeration, and intermittent aeration breaks the dynamic balance of constant aeration to achieve the effect of scrubbing the membrane, and constant aeration can ensure the cleanliness of the membrane during the period when intermittent aeration stops aeration, thereby ensuring the cleaning effect of the membrane surface.

[0053] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative, not restrictive, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than solely through the specific combinations listed in the claims.

[0054] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. An aeration mechanism, characterized in that: It comprises a closed aeration box body, wherein a plurality of partitions are arranged in the aeration box body, wherein the plurality of partitions divide the space in the aeration box body into a plurality of normal aeration chambers and a plurality of intermittent aeration chambers, wherein the normal aeration chambers and the intermittent aeration chambers are arranged in sequence at intervals; a normal aeration pipe is arranged in the normal aeration chamber, and an intermittent aeration pipe is arranged in the intermittent aeration chamber; the normal aeration pipe is a vertically arranged straight pipe, wherein the top of the normal aeration pipe is a normal air outlet, and the bottom is a normal air inlet, and the normal air outlet passes through the top of the aeration box body; the intermittent aeration pipe is a vertically arranged U-shaped pipe of unequal height, wherein the higher end of the intermittent aeration pipe is an intermittent air outlet, and the other end is an intermittent air inlet, and the intermittent air outlet passes through the top of the aeration box body.

2. The aeration mechanism according to claim 1, characterized in that: The cross-sectional area of ​​the intermittent aeration chamber is greater than the cross-sectional area of ​​the normal aeration chamber.

3. The aeration mechanism according to claim 1, characterized in that: The height of the intermittent air outlet above the top of the aeration box is 30mm-80mm, the height of the intermittent air inlet below the top of the aeration box is 20mm-50mm, the distance between the intermittent air inlet and the bottom of the intermittent aeration pipe is 80mm-150mm; the diameter of the intermittent aeration pipe is 8mm-12mm.

4. The aeration mechanism according to claim 1, characterized in that: The height of the normal air outlet above the top of the aeration box body is 30mm-80mm, and the height of the normal air inlet below the top of the aeration box body is 80mm-120mm; the diameter of the normal aeration pipe is 6mm-12mm.

5. The aeration mechanism according to claim 1, characterized in that: The partition is provided with a connecting hole at a position close to the bottom, and the connecting hole connects the normal aeration chamber and the intermittent aeration chamber.

6. The aeration mechanism according to claim 5, characterized in that: The side walls of the plurality of intermittent aeration chambers are all provided with penetrating aeration holes, the height of the aeration holes is lower than the bottom of the intermittent aeration tube and higher than the height of the connecting hole; there are a plurality of aeration holes, and the plurality of aeration holes are evenly spaced.

7. The aeration mechanism according to claim 1, characterized in that: The intermittent aeration pipe is arranged at a certain angle relative to the partition, and the angle ranges from 50° to 60°.

8. The aeration mechanism according to claim 1, characterized in that: The top of the aeration box is provided with a slope.

9. The aeration mechanism according to claim 1, characterized in that: Both ends of the aeration box body are provided with fixing ears.

10. The aeration mechanism according to claim 1, characterized in that: The aeration box body is made of stainless steel.

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