A preliminary study into the local solids fluxes in a downer reactor

A non-isokinetic sampling method was used to study the effects of gas velocity, solids circulation rate and axial and radial positions on the local solids flux in a gas–solids downer fluidized bed. The radial profiles of solids flux are highly dependent on the axial position. The local solids flux i...

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Bibliographic Details
Published inPowder technology Vol. 114; no. 1; pp. 96 - 101
Main Authors Ball, J.S, Zhu, J.-X
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 15.01.2001
Elsevier
Subjects
Applied sciences
Chemical engineering
Downer
Exact sciences and technology
Fluidization
Fluxes
Solids
Solids
Downer
Fluxes
Downward flow
Two phase flow
Hydrodynamics
Cocurrent flow
Fluidization
Experimental study
Mass transfer
Gas solid flow
Circulating fluidized bed
Radial field
Flux density
Gas solid
Axial field
Sampling
Mass flow
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Summary:A non-isokinetic sampling method was used to study the effects of gas velocity, solids circulation rate and axial and radial positions on the local solids flux in a gas–solids downer fluidized bed. The radial profiles of solids flux are highly dependent on the axial position. The local solids flux is also dependent on the overall solids circulation rate but not dependent on the gas velocity. The solids flux profiles in the downer were also found to be quite different from those reported in the riser.
ISSN:0032-5910
1873-328X
DOI:10.1016/S0032-5910(00)00274-6