Self-driven rotary aeration device

Abstract

The invention provides a self-driven rotary aeration device which comprises a fixed air vertical pipe and a movable air vertical pipe, the fixed air vertical pipe and the movable air vertical pipe are connected through a rotary joint, inclined blades are arranged on the movable air vertical pipe, a rotary transverse pipe is arranged at the bottom end of the movable air vertical pipe, and air outlet holes are formed in the rotary transverse pipe. Compared with fixed aeration, rotary aeration has the advantages that the proportion of a bubble activity space in an aeration reactor in the whole space can be increased, uniform air distribution is promoted, uniform fluidization of the filler is promoted, the phenomena of filler accumulation or ball death and the like are prevented, and sludge sedimentation can also be prevented. Rotation of the rotating blades can also promote mixed contact of water, gas and microorganisms in the reactor, and mass transfer is enhanced.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a self-driven rotary aeration device. Background technique [0002] Aeration is a key link in the biological treatment of sewage and wastewater. In the activated sludge process, aeration can achieve the purpose of oxygenating and stirring the water; in the biofilm process, aeration can achieve the function of oxygenating the water. For the moving-bed biofilm reactor (Moving-Bed Biofilm Reactor, hereinafter abbreviated as MBBR) and activated sludge aeration tank in the process of adding moving filler, aeration can realize oxygenation and fluidization of filler. Rotary aeration can promote uniform air distribution, promote uniform fluidization of fillers, prevent filler accumulation or dead balls, and prevent sludge settlement. [0003] The aeration heads or perforated pipes in most existing aeration systems are fixedly installed. In this way, the upward traj...

AI Technical Summary

Problems solved by technology

But there are the following problems: (1) The upward trajectory of the bubble in the water is related to its force

(2) Underwater bearings have problems such as corrosion, wear and even jamming caused by the entry of solid particles

[0007] Patent 201711037255.5 proposes to use the reaction force generated by the gas flowing out from the perforated aeration tube orifice to push the perforated tube to rotate to realize rotary aeration. This kind of device does not need to install a motor, but the driving force is the difference between the gas-water pressure at the perforated tube mouth and the perforated tube mouth. The product of the area, the driving force is small, and the actual rotation effect is not good

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