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Static instability analysis of circulating fluidized beds and concept of high‐density risers
Author(s) -
Bi Hsiaotao,
Zhu Jingxu
Publication year - 1993
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690390803
Subject(s) - instability , fluidized bed combustion , fluidized bed , mechanics , fluidization , flow (mathematics) , materials science , thermodynamics , physics
An instability analysis has been carried out to elucidate the unsteady flow conditions encountered in the typical circulating fluidized bed units in light of the conveyor‐solids feeder interaction. The results successfully predict the critical velocity and the maximum solids circulation rates reported in the literature and explain the origin of such unstable conditions. Furthermore, the simulation, for the first time, reveals the importance of unit structure in improving the performance of circulating fluidized bed systems. Finally, the concept of a high‐density circulating fluidized bed is proposed.