CN212403673U

CN212403673U - Micropore aeration system

Info

Publication number: CN212403673U
Application number: CN202020644033.0U
Authority: CN
Inventors: 牛涛; 张振; 安平林; 王冠平; 石伟; 于豹; 梁华杰
Original assignee: Everbright Water Technology Development Nanjing Co ltd; Everbright Water Shenzhen Co ltd
Current assignee: Everbright Water Technology Development Nanjing Co ltd; Everbright Water Shenzhen Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-01-26
Anticipated expiration: 2030-04-24

Abstract

The utility model discloses a micropore aeration system belongs to sewage treatment technical field. The micropore aeration system is provided with a first aeration main pipe and a second aeration main pipe in parallel in the same plane, a plurality of first aeration branch pipes extend from the first aeration main pipe from top to bottom, a plurality of second aeration branch pipes extend from the second aeration main pipe from bottom to top, the first aeration branch pipes and the second aeration branch pipes are arranged in a staggered mode, a plurality of aeration heads are respectively arranged on the first aeration branch pipes and the second aeration branch pipes to achieve mutually independent air distribution of the two groups of aeration branch pipes, the dissolved oxygen requirements of different concentrations of an aerobic pool are effectively met, and the aeration uniformity and the aeration coverage are further improved.

Description

Micropore aeration system

Technical Field

The utility model belongs to the technical field of sewage treatment, more specifically say, relate to a micropore aeration system.

Background

In the activated sludge aerobic tank process unit, a micropore aeration mode is generally adopted to improve the dissolved oxygen in water. Aerating to make air contact with water strongly, supplying oxygen to aerobic pool, and providing dissolved oxygen needed by microbial biochemical action; meanwhile, the functions of mixing and stirring are achieved, so that microorganisms in the aerobic tank are fully contacted with dissolved oxygen, and favorable reaction conditions are provided for microorganism metabolism.

Generally, an aeration system consists of a fan, an aeration air pipe and an aerator, and compressed air output by the fan is conveyed to the aerator through the air pipe and is redistributed to an aerobic tank. Generally, the type selection of the blower and the type selection design of the aeration system are carried out according to the designed water amount and the designed load, under the condition that the just input running water amount is small or the seasonal change, particularly the summer load is low, although the conveying aeration amount can be adjusted by adjusting the air volume of the blower or the number of running fans, because the aeration air distribution system in the aerobic tank is designed according to the designed water amount and the designed load, if the air volume of the blower is set according to a DO value, the air volume is too low, part of the aeration disks are uneven, the output air volume of the blower is required to be increased in the actual running process to increase the aeration amount, so that the uniform aeration of the aeration system is ensured, the over aeration is easy under the condition (the DO is far greater than the set value of 2 mg/L), and the energy.

Moreover, the existing sewage plants generally have the requirement of denitrification, if DO is too high due to over-aeration, the nitrification liquid is refluxed to the anoxic tank through internal reflux, so that the too high DO is easily brought into the anoxic tank, the anoxic environment of the anoxic tank is easily damaged, the denitrification of the anoxic tank is influenced, and the DO also consumes the carbon source used for denitrification, so that the cost of the carbon source is increased.

The retrieval shows that the Chinese patent application with application number 201410146235.1, filed 4/14/2014, discloses a micropore aeration system, which comprises an air inlet pipe, an air distribution pipe, aeration branch pipes and a variable-pore aeration hose, wherein the air inlet pipe is communicated with the air distribution pipe, the air distribution pipe is provided with the aeration branch pipes, a plurality of aeration holes are uniformly distributed on each aeration branch pipe in the axial direction and the radial direction, two sealing rubber strips are arranged on two sides of each aeration branch pipe, the variable-pore aeration hose is sleeved on the two sealing rubber strips on the two sides of each aeration branch pipe, and a plurality of micro cuts are uniformly distributed on the variable-pore aeration hose in the axial direction. The invention adopts the multi-position three-dimensional variable-hole aeration system to oxygenate, so that the area of a gas-liquid interface is increased, the gas-liquid contact is wider, and the aeration resistance and the aeration loss are smaller. But the aeration is still a single tubular aeration, the aeration requirements of all the tank bodies cannot be quickly and effectively met, and the uniformity and the coverage of the aeration are still to be further improved.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

Aiming at the problem that the uniformity and the coverage of the aeration system in the prior art need to be further improved, the utility model provides a micropore aeration system. The micropore aeration system is provided with a first aeration main pipe and a second aeration main pipe in parallel in the same plane, a plurality of first aeration branch pipes extend from the first aeration main pipe from top to bottom, a plurality of second aeration branch pipes extend from the second aeration main pipe from bottom to top, the first aeration branch pipes and the second aeration branch pipes are arranged in a staggered mode, a plurality of aeration heads are respectively arranged on the first aeration branch pipes and the second aeration branch pipes to achieve mutually independent air distribution of the two groups of aeration branch pipes, the dissolved oxygen requirements of different concentrations of an aerobic pool are effectively met, and the aeration uniformity and the aeration coverage are further improved.

2. Technical scheme

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

the utility model discloses a micropore aeration system, which comprises a first aeration main pipe and a second aeration main pipe, wherein the first aeration main pipe is provided with a plurality of first aeration branch pipes, and the first aeration branch pipes extend from the first aeration main pipe from top to bottom; a plurality of second aeration branch pipes are arranged on the second aeration main pipe, the second aeration branch pipes extend from the second aeration main pipe to the bottom up, a plurality of aeration heads are respectively arranged on the first aeration branch pipe and the second aeration branch pipe,

the first main aeration pipe and the second main aeration pipe are arranged in parallel in the same plane, the first branch aeration pipes and the second branch aeration pipes are arranged in a staggered mode, the distance between the first main aeration pipe and the second main aeration pipe is D1, the length of the first branch aeration pipe is L1, the length of the second branch aeration pipe is L2, D1> L1, D1> L2, and L1 is L2.

Preferably, the height between the first main aeration pipe and the second main aeration pipe and the bottom of the aerobic tank is 100-300 mm.

Preferably, D1-L1 is 0.3-1 m.

Preferably, the distance between the first aeration branch pipe and the second aeration branch pipe is D2, and D2 is 0.5-1.5 m.

Preferably, the number of aeration heads provided on the first branch aeration pipes is the same as the number of aeration heads provided on the second branch aeration pipes.

Preferably, a first air inlet control valve is arranged at the end part of the first aeration main pipe, and a second air inlet control valve is arranged at the end part of the second aeration main pipe.

Preferably, the distance between two adjacent aeration heads on the first branch aeration pipe or the second branch aeration pipe is D3, and D3 is 0.3-0.7 m.

The aeration head is one or more of a bubble aerator, a micropore aerator and a rotational flow cutting aerator.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a micropore aeration system, through being provided with first aeration main pipe and second aeration main pipe in parallel in the coplanar, and extend from top to bottom from first aeration main pipe and be provided with a plurality of first aeration branch pipes, extend from bottom to top from second aeration main pipe and be provided with a plurality of second aeration branch pipes, set up first aeration branch pipe and second aeration branch pipe crisscross each other and realize that two aeration main pipes distribute gas to two sets of aeration branch pipes independently, can effectively satisfy the dissolved oxygen requirement of the different concentrations of aerobic tank, improve the homogeneity and the coverage of aeration;

(2) the microporous aeration system of the utility model has the same effect as single-group aeration under the condition of the same working power of the fan;

(3) the utility model discloses a micropore aeration system, under the lower condition of low-load and oxygen demand, aeration fan's energy consumption will organize aeration system more and reduce half than, further reduced the energy consumption when guaranteeing the demand, practice thrift the running cost.

Drawings

FIG. 1 is a top view of a micro-aeration system according to the present invention;

in the figure:

100. an aerobic tank; 110. a first aeration main pipe; 111. a first aeration branch pipe;

112. a first intake control valve; 120. a second aeration main pipe; 121. a second aeration branch pipe;

122. a second intake control valve; 200. an aeration head.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

Example 1

As shown in fig. 1, the microporous aeration system of the present invention comprises a first main aeration pipe 110 and a second main aeration pipe 120, wherein the first main aeration pipe 110 and the second main aeration pipe 120 are arranged in parallel in the same plane, the height of the bottom of the aerobic tank 100 is 100-300 mm at a distance of 0.8m × 10m, and the distance between the first main aeration pipe 110 and the second main aeration pipe 120 is D1; a first air inlet control valve 112 is arranged at the end part of the first main aeration pipe 110 and used for controlling air to enter the first main aeration pipe 110, and a second air inlet control valve 122 is arranged at the end part of the second main aeration pipe 120 and used for controlling air to enter the second main aeration pipe 120;

the first aeration main pipe 110 is provided with a plurality of first aeration branch pipes 111, the first aeration branch pipes 111 extend from the first aeration main pipe 110 to the top, the length of the first aeration branch pipes 111 is L1, and the first aeration main pipe 110 can continuously supply air to the plurality of first aeration branch pipes 111; the second aeration main pipe 120 is provided with a plurality of second aeration branch pipes 121, the second aeration branch pipes 121 extend from the second aeration main pipe 120 to the bottom, the length of the second aeration branch pipes 121 is L2, and the second aeration main pipe 120 can continuously supply air to the plurality of second aeration branch pipes 121; wherein the length L1 of the first branched aeration pipe 111 is equal to the length L2 of the second branched aeration pipe 121, and the distance D1 between the first main aeration pipe 110 and the second main aeration pipe 120 is greater than the length L1 of the first branched aeration pipe 111 or the length L2 of the second branched aeration pipe 121, i.e.; d1> L1, D1> L2, and L1 ═ L2. It should be further noted that a distance difference between the distance D1 between the first aeration main pipe 110 and the second aeration main pipe 120 and the length L1 of the first aeration branch pipe 111 or the length L2 of the second aeration branch pipe 121 may be set within a range of 0.3 to 1 m.

The first and second

aeration branch pipes

111 and 121 are alternately arranged, and the distance between the first and second

aeration branch pipes

111 and 121 is D2, preferably D2 is 0.5 to 1.5 m. A plurality of aeration heads 200 are provided at the first and second

aeration branch pipes

111 and 121, respectively, and the gas introduced into the first and second

aeration branch pipes

111 and 121 is discharged into the aerobic tank 100 in the form of small bubbles through the aeration heads 200. The aeration head may be one or more of a bubble aerator, a micro-pore aerator, and a cyclone cutting aerator.

It should be noted that the number of the aeration heads 200 arranged on the first branch aerator pipe 111 may be the same as the number of the aeration heads 200 arranged on the second branch aerator pipe 121, the distance between two adjacent aeration heads 200 on the first branch aerator pipe 111 or the second branch aerator pipe 121 is D3, D3 is 0.3-0.7 m, and the distance between the aeration heads is set within this range, so that the water body can achieve the optimal turbulence effect, and the aeration heads can be uniformly distributed.

When high dissolved oxygen is required (e.g. aeration amount up to 100 m)³Min), the air quantity of the first aeration main pipe 110 and the second aeration main pipe 120 can reach 50m respectively by controlling the first air inlet control valve 112 and the second air inlet control valve 122 of the aeration system³And/min, each aeration head 200 can be uniformly aerated. The air quantity of the aeration main pipe adopting single-pipe aeration reaches 100m³Compared with min, the aeration system of the utility model can realize that the air quantity of each aeration head is equal to the air quantity of a single aeration head of a single-tube aeration system.

When low dissolved oxygen is required (e.g. 10m aeration)³Min), the first aeration main pipe 110 and the second aeration main pipe 120 are closed by controlling the first air inlet control valve 112 and the second air inlet control valve 122 of the aeration system of the utility model, and 10m aeration is carried out through the single main pipe³Min, the wind pressure of each aeration head is far greater than that of the traditional single pipe aeration by 10m³And the air pressure of each aeration head at min. When the requirement of small air quantity can be met, the aeration head can perform uniform aeration.

It is particularly emphasized that when low dissolved oxygen is required, if single-tube aeration is adopted, for example, the air volume of the aeration main pipe reaches 10m³And min, the air pressure of each aeration head is smaller than the water pressure, so that the aeration heads cannot aerate normally. If the aeration head can perform uniform aeration, the air volume of the aeration main pipe needs to be increased, and the air volume is too large at the moment, so that excessive aeration is caused, and the energy consumption of the air blower is wasted. If the DO is too high due to overexposure, the anoxic tank for returning the nitrified liquid through the internal return flow is easy to bring the DO into the anoxic tank which is too high, so that the DO is easy to damageThe anoxic environment of the anoxic tank affects the denitrification of the anoxic tank, and the DO also consumes the carbon source that would otherwise be used for denitrification, resulting in an increase in carbon source cost. Therefore, under the condition of low-load oxygen demand, the energy consumption of the aeration fan of the double-pipeline aeration system is reduced by half compared with that of a single-pipeline system, and the aeration is ensured to be uniform.

The invention has been described above in detail with reference to specific exemplary embodiments. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined by the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to illustrate the present state of the art and the meaning of the present development and is not intended to limit the present invention or the present application and the field of application of the present invention.

Claims

1. A microporous aeration system, characterized in that: the aeration device comprises a first aeration main pipe (110) and a second aeration main pipe (120), wherein a plurality of first aeration branch pipes (111) are arranged on the first aeration main pipe (110), and the first aeration branch pipes (111) extend from the first aeration main pipe (110) from top to bottom; a plurality of second aeration branch pipes (121) are arranged on the second aeration main pipe (120), the second aeration branch pipes (121) extend from the second aeration main pipe (120) to the bottom up, a plurality of aeration heads (200) are respectively arranged on the first aeration branch pipe (111) and the second aeration branch pipes (121),

the first main aeration pipe (110) and the second main aeration pipe (120) are arranged in parallel in the same plane, the first branch aeration pipes (111) and the second branch aeration pipes (121) are arranged in a staggered manner, the distance between the first main aeration pipe (110) and the second main aeration pipe (120) is D1, the length of the first branch aeration pipe (111) is L1, the length of the second branch aeration pipe (121) is L2, D1 is more than L1, D1 is more than L2, and L1 is L2.

2. A micro-aeration system according to claim 1, wherein: the height between the first main aeration pipe (110) and the second main aeration pipe (120) and the bottom of the aerobic tank (100) is 100-300 mm.

3. A micro-aeration system according to claim 1, wherein: D1-L1 is 0.3-1 m.

4. A micro-aeration system according to claim 1, wherein: the distance between the first aeration branch pipe (111) and the second aeration branch pipe (121) is D2, and D2 is 0.5-1.5 m.

5. A micro-aeration system according to claim 1, wherein: the number of aeration heads (200) arranged on the first aeration branch pipe (111) is the same as that of the aeration heads (200) arranged on the second aeration branch pipe (121).

6. A micro-aeration system according to claim 1, wherein: a first air inlet control valve (112) is arranged at the end part of the first aeration main pipe (110), and a second air inlet control valve (122) is arranged at the end part of the second aeration main pipe (120).

7. A micro-porous aeration system according to claim 5, wherein: the distance between two adjacent aeration heads (200) on the first aeration branch pipe (111) or the second aeration branch pipe (121) is D3, and D3 is 0.3-0.7 m.

8. A micro-porous aeration system according to any one of claims 1 to 7, wherein: the aeration head (200) is one or more of a bubble aerator, a micropore aerator and a cyclone cutting aerator.