气-液-固三相循环流化床中的液相轴向扩散

CIESC Journal

• RESEARCH NOTES • 上一篇下一篇

气-液-固三相循环流化床中的液相轴向扩散

M.Vatanakul^a; 孙国刚^b; 郑莹^a; M.Couturier^a

^a Department of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, P.O. Box4400, Fredericton, N.B. E3B5A3, Canada
^b University of Petroleum, Beijing 102249, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-02-28 发布日期:2005-02-28
通讯作者: M.Vatanakul

Axial Liquid Dispersion in Gas-Liquid-Solid Circulating Fluidized Bed

M.Vatanakul^a; SU Guogang^b; ZHENG Ying^a; M.Couturier^a

^a Department of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, P.O. Box4400, Fredericton, N.B. E3B5A3, Canada
^b University of Petroleum, Beijing 102249, China

Received:1900-01-01 Revised:1900-01-01 Online:2005-02-28 Published:2005-02-28
Contact: M.Vatanakul

摘要/Abstract

摘要： The effects of liquid viscosities, solid circulating rates, liquid and gas velocities and phase holdups on the axial dispersion coefficient, Dax, were investigated in a gas-liquid-solid circulating fluidized bed (GLSCFB).Liquid viscosity promotes the axial liquid backmixing when solid particles and gas bubbles are present. Increases in gas velocities and solid circulating rates lead to higher Dax. The effects of liquid velocity on Dax are associated with liquid viscosity. Compared with conventional expanded beds, the GLSCFBs hold less axial liquid dispersion,approaching ideal plug-flow reactors.

关键词: 循环流化床;气-液体-固体;液体散射性质;化工设备;反应过程

Abstract: The effects of liquid viscosities, solid circulating rates, liquid and gas velocities and phase holdups on the axial dispersion coefficient, Dax, were investigated in a gas-liquid-solid circulating fluidized bed (GLSCFB).Liquid viscosity promotes the axial liquid backmixing when solid particles and gas bubbles are present. Increases in gas velocities and solid circulating rates lead to higher Dax. The effects of liquid velocity on Dax are associated with liquid viscosity. Compared with conventional expanded beds, the GLSCFBs hold less axial liquid dispersion,approaching ideal plug-flow reactors.

Key words: axial liquid dispersion, gas-liquid-solid circulating fluidized bed, liquid viscosity

M.Vatanakul,孙国刚,郑莹,M.Couturier. 气-液-固三相循环流化床中的液相轴向扩散[J]. CIESC Journal.

M.Vatanakul,SU Guogang,ZHENG Ying,M.Couturier. Axial Liquid Dispersion in Gas-Liquid-Solid Circulating Fluidized Bed[J]. .

气-液-固三相循环流化床中的液相轴向扩散

Axial Liquid Dispersion in Gas-Liquid-Solid Circulating Fluidized Bed

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