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

A jet aeration and reactor technology, applied in fluid mixers, water/sludge/sewage treatment, chemical instruments and methods, etc. Popularization and application of jet aerator

Inactive Publication Date: 2004-10-20
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0019] Concrete structure and process method of the present invention are specified below in conjunction with accompanying drawing:

[0020] figure 1 It is a sectional view of jet aeration reactor used in activated sludge process. The jet aeration reactor mainly includes a guide tube 1, a jet circulation reactor 2, a sludge return distributor 3, a jet aerator 4 arranged at the bottom of the jet aeration reactor and concentric with it, and a jet aerator 4 arranged at the jet circulation reaction The impact surface 10 in the upper part of the device. The jet aeration reactor is divided into upper and lower reactors. Jet aerators (such as figure 2 Shown) includes a liquid-driven nozzle 5, a fixed inverted cone 6, a distribution plate 7, an annular gap 8, and a gas channel 9.

[0021] The liquid-driven nozzle 5 selects a conical convergent nozzle, keeps the flow velocity of the nozzle at 20-25m / s, and determines its geometric size according to the flow rate and the flow veloc...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F5/02C02F3/12C02F3/14
CPCY02W10/10
Inventor 王建龙马君健
Owner TSINGHUA UNIV
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