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

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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

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

通讯作者: M.Vatanakul

Abstract

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

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

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

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.

[1]	Zhou Yunlong, Lu Zhiye, WANG Meng. Recursive analysis and agglomerate state recognition of spray gas-solid fluidized bed [J]. CIESC Journal, 2018, 69(9): 3835-3842.
[2]	ZHANGDongli, ZHANGYanjun,ZHANGJinli, LIXiao-fang, LULixiang,MENGXiangkun, MUXuhong. Axial Liquid Dispersion Characteristics in Magnetically Stabilized Bed [J]. , 2006, 14(4): 532-536.