Abstract

A mathematical model has been developed which successfully describes the dynamics around a circulating fluidized bed loop. The dilute phase region of the fast bed, including the acceleration zone, can be correlated with pneumatic transport equations developed by the author earlier (Yang 1977). A dense phase pneumatic transport model with an annular region was employed to characterize the dense phase region of the fast bed. The height of the dense phase region was then obtained by pressure balance around the complete circulating fluidized bed loop. The model as formulated provides a good description of literature data reported by Kwauk and co-workers (1985), Weinstein and co-workers (1983), Arena and coworkers (1985), Hartge, Li and Werther (1985) and others.

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