An experimental investigation on solid acceleration length in the riser ofa long circulating fluidized bed

Authors
Citation
Wx. Huang et Jx. Zhu, An experimental investigation on solid acceleration length in the riser ofa long circulating fluidized bed, CHIN J CH E, 9(1), 2001, pp. 70-76
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
CHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN journal
1004-9541 → ACNP
Volume
9
Issue
1
Year of publication
2001
Pages
70 - 76
Database
ISI
SICI code
1004-9541(200102)9:1<70:AEIOSA>2.0.ZU;2-0
Abstract
Systematic experimental work was conducted to investigate the solid acceler ation length in a 16 m long circulating fluidized bed riser with fluid crac king catalyst particles over a wide range of operating conditions. A more f easible method is proposed to determine the acceleration length from the me asured 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 a nd superficial gas velocity is obtained. It is found that the acceleration length increases generally with increasing solid flow rate and/or decreasin g 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.