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Effect of various parameters on the solid circulation rate in a liquid–solid circulating fluidized bed
Author(s) -
Natarajan P.,
Velraj R.,
Seeniraj R. V.
Publication year - 2008
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.178
Subject(s) - fluidized bed combustion , fluidized bed , volumetric flow rate , mechanics , circulation (fluid dynamics) , liquid flow , materials science , particle (ecology) , liquid phase , flow (mathematics) , thermodynamics , chromatography , chemistry , physics , geology , oceanography
A liquid–solid circulating fluidized bed (LSCFB) is operated at high liquid velocity, where particle entrainment is highly significant, and between the conventional liquid fluidized bed and the dilute‐phase liquid transport regimes. In the present work, systematic experiments were carried out in a 0.094 m i.d. and 2.4 m height laboratory‐scale LSCFB apparatus by using various solid particles and tap water as fluidizing medium to study the hydrodynamics. The effects of operating parameters, i.e. primary liquid flow rate in the riser ( j f ), auxiliary liquid flow rate ( j a ), total liquid flow rate ( j l ), particle density (ρ s ), particle diameter ( d p ) and solid feed pipe diameter ( d o ) on the solid circulation rate were analyzed from the experimental data. Finally, a correlation was developed from the experimental data to estimate solid velocity (solid circulation rate), and was compared with the present experimental and available data in the literature. They agree well with a maximum root mean‐square (RMS) deviation of 12%. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.