A new technique for the evaluation of a circulating fluidized bed mixing chamber with a central solids jet

被引:8
作者
Mirgain, C
Briens, CL [1 ]
Del Pozo, M
Loutaty, R
Bergougnou, MA
机构
[1] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada
[2] CERT, Total Raffinage Distribut, F-76700 Harfleur, France
关键词
circulating fluidized bed; downer; fast fluidized bed; gas-solids mixing; mixor; momentum probe; riser;
D O I
10.1016/S0032-5910(97)03369-X
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Many gas-solid reactions an performed in circulating fluidized beds which are either operated in the downer or riser mode. Good gas-solid contact in the early stages of the reaction is crucial to such reactors. A simple experimental tool has been developed for rapid, rough characterization of the gas-solids dispersion at the mixing chamber exit. A simplified momentum probe provides instantaneous pressure signals at seven radial locations. Cross-correlation analysis of these signals results in three new indices: a mixing index, a uniformity index and a stability index. These indices have been successfully applied to the selection of the best mixing chamber for a downer. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:202 / 210
页数:9
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