Device and method for enhancing aeration by utilizing hydraulic shearing and gas buoyancy

Abstract

The invention provides a device for enhancing aeration by using hydraulic shearing and gas buoyancy. The device comprises a bubble generation unit and an air lift circulation unit, the bubble generation unit comprises an aeration core tube, an air blower and a booster pump; the aeration core pipe comprises a rotational flow cavity section with a cavity structure inside, and is provided with a liquid inlet, an air inlet and a bubble outlet; the airlift circulation unit comprises an inner circulation area and an outer circulation area. Liquid enters the aeration core pipe in the tangential direction to do high-speed rotational flow motion, gas enters from the bottom and is subjected to directional momentum shearing by the fluid to generate fine bubble groups, the fine bubble groups rise along with mixed liquid in the inner circulation area under the action of gas buoyancy, the mixed liquid in the outer circulation area drops under the action of density difference, and part of the mixed liquid in the aeration tank is sucked by the inner circulation area to form liquid-phase circulation enhanced aeration. According to the invention, the turbulence degree in the aeration tank can be increased, the sludge suspension is maintained, the oxygen is quickly filled, the dissolved oxygen in the aeration tank is uniformly distributed, and the problems of blockage, damage and the like of the aeration device are avoided.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a device and method for enhancing aeration by utilizing hydraulic shear and gas buoyancy. Background technique [0002] Biological wastewater treatment is a method of using microbial metabolism to decompose degradable organic matter in wastewater, thereby purifying water. Due to its advantages of large processing capacity, small investment, and economical reliability, it is currently the most common water treatment method. Among them, the treatment effect of the widely used aerobic biological method is often restricted by the aeration performance in the aeration tank. The main parameters of the aeration performance include the energy consumption of the aeration equipment, oxygenation capacity, oxygen utilization rate and sludge suspension. degree etc. In the current process of aerobic biological treatment of sewage, the energy consumption of aeration equipment is ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a device and method for enhancing aeration by using hydraulic shearing and gas buoyancy to solve the problem that the aeration system in the prior art is easy to block, easy to damage, large pressure drop, oxygen-filled Problems and technical defects such as low efficiency, uneven aeration, poor mixing effect, etc.

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