CN210457628U

CN210457628U - Structure for improving oxygenation efficiency of air supply type jet aeration device

Info

Publication number: CN210457628U
Application number: CN201920685455.XU
Authority: CN
Inventors: 王先宝; 阎毓; 张安龙; 张波; 高俊玲; 侯银萍; 亓雪菲; 张雨笛
Original assignee: Shaanxi University of Science and Technology
Current assignee: XI AN LONGHUA ENVIRONMENTAL PROT TECHNOLOGY Co.,Ltd.
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-05-05
Anticipated expiration: 2029-05-14

Abstract

The utility model provides an improve air feed formula efflux aeration equipment and oxygenate structure of efficiency, includes the mixing chamber, the inside spherical gas-liquid mixture unit that is provided with of mixing chamber, spherical mixture unit links to each other and sets up in one-level nozzle front end with the intake pipe, the intake pipe is located spherical mixture unit top, deviates from one-level nozzle department at spherical mixture unit and offers the hole or set up the outlet duct, the mixing chamber department that is located the outlet duct front end is provided with the second grade nozzle, the one-level nozzle setting is on circulating water pipe. The utility model discloses an improve the structure in the aerator, make the air that lets in sewage, activated sludge and the intake pipe carry out the intensive contact and mix to improve the oxygen transfer efficiency and the power efficiency of aerator.

Description

Structure for improving oxygenation efficiency of air supply type jet aeration device

Technical Field

The utility model relates to the technical field of aerobic biological treatment facilities for sewage treatment, in particular to a structure for improving the oxygenation efficiency of an air supply type jet aeration device.

Background

The aerobic biological treatment is a main process for treating domestic sewage and industrial wastewater, and has the advantages of good treatment effect, low operation cost and the like. The aeration equipment mainly supplies oxygen to the water in the aerobic treatment system, so that the oxygen in the air can be effectively dissolved into unsaturated water to maintain the growth and biological oxidation of microorganisms; the activated sludge in the water body is in a suspension state through the stirring and mixing action of the aeration equipment, and organic matters, microorganisms and oxygen in the water can be fully contacted, so that favorable conditions are created for the removal of the organic matters and the growth of the microorganisms; the aeration equipment has driving force on water flow, so that the mud-water mixture circularly flows in the aeration tank, and the uniform distribution of oxygen in the water body is promoted. Meanwhile, the aeration system is used as a core unit of the sewage treatment plant, and the energy consumption accounts for about 45-75% of that of the whole sewage treatment plant. Therefore, the research on the aeration equipment with high oxygenation performance has great significance for saving energy and reducing consumption of the sewage treatment plant.

Currently, aerators in more use can be roughly classified into three categories: air diffusion aerator, mechanical aerator, jet aerator. The jet aerator has both oxygen-charging and flow-pushing functions on sewage, so that the jet aerator is widely applied to aerobic biological treatment processes. The improved air supply type low-pressure jet aerator forcibly blows air into the aerator through the air blower to be mixed with a solid-liquid mixed phase, the oxygen transfer efficiency reaches 30% -35%, the requirement on the lift of a circulating water pump is low, and the power efficiency can reach 4.0-5.2 kg/(kW.h). Compared with a self-suction jet aerator, the aerator has the advantages of difficult blockage, no need of maintenance basically, higher sludge concentration, no secondary pollution caused by flying fog and better advantages than a microporous aerator and mechanical aeration. The mixing effect of the gas and the water is poor due to low oxygenation efficiency.

Disclosure of Invention

In order to further improve the oxygen transfer efficiency and the power efficiency of air supply formula low pressure jet aerator, the utility model discloses a structure in through improving the aerator makes the air that lets in carry out the intensive contact mixture in sewage, activated sludge and the intake pipe to improve the oxygen transfer efficiency and the power efficiency of aerator.

In order to realize the purpose, the utility model discloses a technical scheme is:

the utility model provides an improve air feed formula efflux aeration equipment oxygenating efficiency's structure, includes

mixing chamber

5, 5 inside spherical gas-liquid mixing unit 3 that is provided with of mixing chamber, spherical gas-liquid mixing unit 3 links to each other and sets up in 2 front ends of one-level nozzle with intake pipe 4, intake pipe 4 is located 3 tops of spherical gas-liquid mixing unit, deviates from one side of 2 departments of one-level nozzle at spherical gas-liquid mixing unit 3 and sets up hole 7 or set up

outlet duct

8, 5 departments of mixing chamber that are located 8 front ends of outlet duct are provided with second grade nozzle 6, one-level nozzle 2 set up on circulating water pipe 1.

The sectional area of the spherical gas-liquid mixing unit 3 accounts for 30-50% of that of the mixing chamber 5.

The spherical gas-liquid mixing unit 3 is arranged at the position 5-10cm away from the front end of the primary nozzle 2, and the center point in the spherical gas-liquid mixing unit 3 and the center of the primary nozzle 2 are at the same horizontal height.

The maximum projection area of the hole 7 accounts for 20-50% of the maximum sectional area of the spherical gas-liquid mixing unit 3, the length of the gas outlet pipe 8 is 1-4cm, and the area of the gas outlet pipe 8 accounts for 20-50% of the maximum sectional area of the spherical gas-liquid mixing unit 3.

The utility model has the advantages that:

compare with air feed formula low pressure jet aerator in the actual engineering of being applied to now, the utility model discloses can disperse the mixture better with the gas-liquid solid mixture phase of sewage, activated sludge and air, increase the turbulence intensity in the mixing chamber simultaneously, break up the air into small bubble, increase the gas-liquid area of contact and dissolve in the gas-liquid mixture phase more rapidly to improve the oxygen transfer efficiency and the power efficiency of aerator, reach energy saving and consumption reduction's effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2: set up spherical gas-liquid mixing unit 3 in air feed formula efflux aeration equipment mixing chamber, spherical mixing unit 2 links to each other with intake pipe 4 and sets up in the anterior segment suitable position department in one-level nozzle 2 exit, and the one side of keeping away from nozzle department is seted up hole 7 or is set up outlet duct 8, and gas flows out in hole 7 or outlet duct 8. The liquid flowing out from the primary nozzle 2 is directly sprayed onto the spherical gas-liquid mixing unit 3, the liquid wraps the spherical mixing unit and flows to the mixing chamber 5, violent turbulence is formed at the front end of the opening surface of the spherical gas-liquid mixing unit 3, and gas and liquid are fully mixed, so that the oxygenation efficiency of the device is improved.

The tail end of an air inlet pipe 4 of the air supply type jet aerator is provided with a hollow spherical gas-liquid mixing unit 3, and the sectional area of the spherical gas-liquid mixing unit 3 accounts for 30-50% of the sectional area of a mixing chamber 5. The spherical gas-liquid mixing unit 3 is placed at the position of 5-10cm in the front section of the first-stage nozzle 2, and the center point in the spherical gas-liquid mixing unit 3 and the center of the first-stage nozzle 2 are at the same horizontal height. The side opposite to the first-stage nozzle 2 is provided with a hole 7 or an air outlet pipe 8, the maximum projection area of the hole 7 accounts for 20-50% of the maximum sectional area of the spherical gas-liquid mixing unit 3, the length of the air outlet pipe 8 is 1-4cm, and the area of the air outlet pipe 8 accounts for 20-50% of the maximum sectional area of the spherical gas-liquid mixing unit 3. The liquid flowing out from the primary nozzle 2 is directly sprayed onto the spherical gas-liquid mixing unit 3, the liquid wraps the spherical mixing unit and flows to the mixing chamber 5, violent turbulence is formed at the front end of the opening surface of the spherical gas-liquid mixing unit 3, and gas and liquid are fully mixed, so that the oxygenation efficiency of the device is improved.

Claims

1. The utility model provides an improve structure of air feed formula efflux aeration equipment efficiency of oxygenating, a serial communication port, including mixing chamber (5), mixing chamber (5) inside be provided with spherical gas-liquid mixing unit (3), spherical gas-liquid mixing unit (3) link to each other and set up in one-level nozzle (2) front end with intake pipe (4), intake pipe (4) are located spherical gas-liquid mixing unit (3) top, deviate from one-level nozzle (2) department one side in spherical gas-liquid mixing unit (3) and set up hole (7) or set up outlet duct (8), mixing chamber (5) department that is located outlet duct (8) front end is provided with second grade nozzle (6), one-level nozzle (2) set up on circulating water pipe (1).

2. A structure for improving the oxygenation efficiency of a gas-fed jet aerator as claimed in claim 1, characterized in that the cross-sectional area of said spherical gas-liquid mixing unit (3) is 30-50% of the cross-sectional area of said mixing chamber (5).

3. The structure for improving the oxygenation efficiency of a gas-supplied jet aerator according to claim 1, characterized in that the spherical gas-liquid mixing unit (3) is arranged 5-10cm in front of the primary nozzle (2), and the center point inside the spherical gas-liquid mixing unit (3) is at the same level as the center of the primary nozzle (2).

4. A structure for improving the oxygenation efficiency of a gas-fed jet aerator according to claim 1, characterized in that the maximum projected area of the holes (7) is 20-50% of the maximum cross-sectional area of the spherical gas-liquid mixing unit (3).

5. An arrangement for increasing the oxygenation efficiency of a gas-fed jet aerator according to claim 1, characterised in that said outlet duct (8) is 1-4cm in length.

6. The structure for improving the oxygenation efficiency of a gas-supplied jet aerator according to claim 1, characterized in that the area of the gas outlet pipe (8) is 20-50% of the maximum cross-sectional area of the spherical gas-liquid mixing unit (3).