Premium
A study of solid circulation rate in a circulating fluidized bed
Author(s) -
Luong Pham Hoang,
Bhattacharya S. C.
Publication year - 1993
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440170604
Subject(s) - volumetric flow rate , circulation (fluid dynamics) , fluidized bed combustion , aeration , fluidized bed , fluidization , tube (container) , range (aeronautics) , mechanics , flow (mathematics) , superficial velocity , materials science , environmental science , waste management , engineering , composite material , physics
An experimental investigation under cold condition was made to study the effects of some operating/design parameters and non‐mechanical L valve configuration on the solid circulation rate in a 4.5 m tall, 0.15 m diameter circulating fluidized bed with riser flow rate varying from 1400 litres/min to 2000 litres/min and bed inventory from 15 kg to 25 kg of sand of average sizes 200 μm, 400 μm and 500 μm. Solid circulation rate was estimated by measuring velocity of sand particle travelling through a vertical Perspex tube section at the bottom of the return leg. It was found to be in the range of 2.8 to 12.3kg/m 2 s, 0.07 to 9.1kg/m 2 s and 0.12 to 2.23kg/m 2 s for sand sizes of 200 μm, 400 μm and 500 μm, respectively for a horizontal L valve. Two mathematical correlations have been developed from the experimental results to predict solid circulation rate as a function of riser flow rate, aeration flow rate, total bed inventory and particle size used.