双层桨表面曝气反应器构型优化  

Optimization of Dual-impeller Configuration of Gas?Liquid Surface Aerator

作　　者：李向阳[1] 禹耕之[1] 毛在砂[1] 

机构地区：[1]中国科学院过程工程研究所

出　　处：《过程工程学报》2005年第6期601-604,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20306028;20236050)

摘　　要：针对单层桨表面曝气反应器吸入气体主要集中在反应器上部的缺陷,构建了5种双层桨表面曝气反应器构型.研究了各种构型的传质系数、搅拌功率和混合时间等流体力学特性,表明双层桨构型能改善单层桨构型的缺陷,表面曝气桨与上推式轴流桨组成的双层桨构型的径流桨综合性能最优,符合流场耦合与叠加的原理.In view of the limitation to a gas-liquid surface aerator with single-impeller configurations that the aerated gas bubbles are concentrated in the upper region of the reactor, five dual-impeller configurations are tested with respect to specific power consumption, gas-liquid volumetric mass transfer and mixing time. It is found that the defects of single-impeller configurations are alleviated and the dual-impeller configuration consisting of upper Rushton impeller for surface aeration and lower upward-pumping axial impeller is the best configuration. Such configurations are in accordance with the ormciole of flow field couolin~ and enhancing.

关 键 词：表面曝气 双层桨 气液传质系数 搅拌功率 混合时间 

分 类 号：TQ03[化学工程]