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《中国化学工程学报(英文版)》 2001-01
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An Experimental Investigation on Solid Acceleration Length in the Riser of a Long Circulating Fluidized Bed

HUANG WeixingSchool of Chemical Engineering, Sichuan University, Chengdu 610065ZHU JingxuDepartment of Chemical and Biochemical Engineering, University of Western Ontario, London, N6A5B9, Canada  
Systematic experimental work was conducted to investigate the solid acceleration length in a 16 m long circulating fluidized bed riser with fluid cracking catalyst particles over a wide range of operating conditions. A more feasible method is proposed to determine the acceleration length from the measured axial profiles of pressure gradient (or apparent solid holdup). With this new method and large amount of experimental data, a clear picture on the variation of the acceleration length with both solid circulating rate and superficial gas velocity is obtained. It is found that the acceleration length increases generally with increasing solid flow rate and/or decreasing gas velocity. However, the trend in variation of the acceleration length with operating conditions are quite different in different operation ranges. Reasonable explanations are suggested for the observed variation patterns of acceleration length.
【Fund】: the National Natural Science foundation of China (No. 29928005).
【CateGory Index】: TQ02
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【References】
Chinese Journal Full-text Database 1 Hits
1 QI Xiao-bo1,2,ZHANG Hui2,HUANG Wei-xing1,ZHU Jing-xu2 (1.School of Chemical Engineering,Sichuan University,Chengdu 610065,China; 2.Department of Chemical Engineering,University of Western Ontario,London,Canada N6A 5B9);Solids Concentration in the Fully Developed Zone of CFB Downers[J];Journal of Chemical Engineering of Chinese Universities;2007-04
【Co-references】
Chinese Journal Full-text Database 2 Hits
1 ZHANG Ming-hui, QIAN Zhen, WEI Fei, JIN Yong (Department of Chemical Engineering, Tsinghua University, Beijing 100084, China);Study on Radial Solid-Fraction Profiles in Large-Scale Downer Reactor[J];Journal of Chemical Engineering of Chinese Universities;2002-06
2 LIU Hui-e1, DENG Ren-sheng2, WEI Fei2 (1. Department of Chemical Engineering, China University of Petroleum, Dongying 257061, China 2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China);Simulation of Fluid Catalytic Cracking in Downer[J];Journal of Chemical Engineering of Chinese Universities;2005-05
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 CAI Jin1, LI Tao1, SUN Qi-wen2, YING Wei-Yong1, FANG Ding-Ye1 (1. Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; 2. Shanghai Yankuang Energy R&D Co., Ltd., Shanghai 201203, China);Solid Concentration Distribution in a Gas-solid Fluidized Bed Based on a Branched Pipe Distributor[J];Journal of Chemical Engineering of Chinese Universities;2009-01
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