Premium
Effect of temperature on gas bypassing and solids circulation rate in an internally circulating fluidized bed
Author(s) -
Namkung Won,
Guy Christophe,
Boisselle Fréadéaric,
Legros Robert
Publication year - 2000
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450780601
Subject(s) - annulus (botany) , fluidized bed combustion , circulation (fluid dynamics) , materials science , fluidization , mechanics , thermodynamics , fluidized bed , composite material , physics
The effect of bed temperature in the annulus region on gas bypassing from annulus to riser and solids circulation rate has been determined in an internally circulating fluidized bed. The bed voidage in the annulus region increases with increasing temperature. The average fractions of gas bypassing of annulus gas are 59.4% and 87% at room temperature and high temperature (400°C to 800°C), respectively. Solids circulation rate increases with increasing annulus gas velocity, but is nearly independent of riser velocity. Solids circulation rate increases with increasing temperature.