Design of Impeller Blades for Intensification of Gas-Liquid Dispersion Process in a Stirred Tank

被引：2

作者：

Gu, Deyin ^{[1
,2
]}

Liu, Zuohua ^{[1
,2
]}

Tao, Changyuan ^{[1
,2
]}

Li, Jun ^{[1
]}

Wang, Yundong ^{[3
]}

机构：

[1] Chongqing Univ, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China

[2] Chongqing Key Lab Chem Proc Clean Energy & Resour, Chongqing 400044, Peoples R China

[3] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China

来源：

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING | 2018年 / 16卷 / 12期

基金：

中国国家自然科学基金;

关键词：

gas-liquid dispersion; largest lyapunov exponent; relative power demand; local gas holdup; punched rigid-flexible impeller; MASS-TRANSFER; RUSHTON TURBINE; BUBBLE-SIZE;

D O I：

10.1515/ijcre-2018-0022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Gas-liquid dispersion characteristics were experimentally investigated by measuring largest Lyapunov exponent (LLE), relative power demand (RPD), and local gas holdup in a stirred tank with rigid impellers, rigid-flexible impellers, and punched rigid-flexible impellers. Results showed that punched rigid-flexible impeller could enhance the value of LLE, namely, the chaotic mixing degree of gas-liquid system compared with rigid impeller and rigid-flexible impeller. RPD for punched rigid-flexible impeller was higher than that for rigid impeller and rigid-flexible impeller. The local gas holdup of punched rigid-flexible impeller system was higher than those of rigid impeller system and rigid-flexible impeller system at the same P-g,P-m. In addition, a long flexible connection piece length could improve the chaotic mixing degree, RPD, and local gas holdup. The aperture diameter of 8 mm and free area ratio of 12 % of punched rigid-flexible impeller were particularly suitable for the gas-liquid dispersion process in this work.

引用

页数：17

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