文献类型：期刊文献

英文题名：A novel design for a gas-inducing impeller at the lowest critical speed

作者：Ju, Fan[1];Cheng, Zhen-Min[1];Chen, Jian-Hua[2];Chu, Xiao-He[2];Zhou, Zhi-Ming[1];Yuan, Pei-Qinq[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, UNILAB Res Ctr Chem React Engn, Shanghai 200237, Peoples R China;[2]Zhejiang Shenghua Biok Biol Co Ltd, Deqing, Zhejiang, Peoples R China

年份：2009

卷号：87

期号：8A

起止页码：1069

外文期刊名：CHEMICAL ENGINEERING RESEARCH & DESIGN

收录：;EI(收录号：20092812175748);WOS:【SCI-EXPANDED(收录号:WOS:000268623300008)】；

基金：This work was carried out under the support of Natural Science Foundation of China (No. 20876043), the Shanghai Scientific and Technical Committee on Fundamental Research Project (No. 07D J 14002), and the Program for Changjiang Scholars and innovative Research Team in University of China.

语种：英文

外文关键词：Gas-inducing impeller; Structure improvement; Pressure driving force; Critical speed; Rate of gas induction

摘要：To disperse the unreacted overhead gas phase into the liquid in an agitated reactor without gas outlet, a gas-inducing impeller is usually employed. To determine the lowest critical rotating speed, the gas-induction mechanism was reconsidered by constituting a mechanical energy conservation equation between the gas inlet orifice in the gas phase and the gas outlet orifice in the liquid phase under a certain rotational speed. According to this model, the critical speed of the gas-inducing impeller could be basically determined by the submersion depth and the radial position of the gas outlet, and a novel design was proposed by introduction of six short pipes stretched radially from the axis of the impeller. The final design of the gas-inducing impeller was obtained by an optimal combination of the gas-inducing pipes, the blades of the impeller and the baffle dimension. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.