Jet aeration reactor used in active sludge method and its jet aeration process

Abstract

The present ivnention relates to aeration mode and equipment in waste water treatment. A new kind of jet aeration reactor and jet aeration process is provided. The present invention features that at the bottom of the reactor, a coaxial jet aerator with liquid driven jet, fixed cone, distributing plate and annular gap and a knocking plane in the upper part of the reactor are installed. The two phase gas-liquid flows knock oppositely to form gas-liquid circulation from output to inner, and this can improve the space distribution of bubbles, decrease bubbles aggregation, increase the service area of the jet aerator, maintain the homogeneous energy distribution rate in whole reactor and raise the mass transferring the energy transferring efficiency.

Description

technical field [0001] The invention relates to a sewage treatment aeration method and equipment, in particular to a jet aeration reactor used in an activated sludge process and a jet aeration process thereof. Background technique [0002] Jet aeration, as the third type of aeration method after blast aeration and mechanical aeration, uses the turbulent movement and shearing action of the jet to cut gas and activated sludge flocs, generate microbubbles and enhance sludge activity The advantages of high oxygen transfer rate, simple structure, reliable operation, and low investment cost have great technical and economic potential in sewage treatment. However, self-priming or air-supply single-phase and two-phase nozzle jet aerators generally used at present, such as water jet diffusers and air-water impact diffusers, etc. (see "Theory and Application of Jet Pump Technology", Lu Hongqi, Water Conservancy Electric Power Publishing House, P245-246 and "Theory and Practice of Aer...

AI Technical Summary

Problems solved by technology

However, self-priming or air-supply single-phase and two-phase nozzle jet aerators generally used at present, such as water jet diffusers and air-water impact diffusers, etc. (see "Theory and Application of Jet Pump Technology", Lu Hongqi, Water Conservancy Electric Power Publishing House, P245-246 and "Theory and Practice of Aeration", China Architecture and Building Press, P85) Due to the poor push performance in the jet boundary area, the jet shear and service area of ​​the nozzle is small, resulting in a decrease in oxygen utilization; drive Insufficient working water volume of jet flow and large supplementary circulating water volume, resulting in reduced oxygenation power efficiency and production capacity

Thus affecting the popularization and application of jet aerator

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