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Solids circulation in a spout‐fluid bed with draft tibe
Author(s) -
Berruti Franco,
Muir James R.,
Behie Leo A.
Publication year - 1988
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.5450660604
Subject(s) - draft tube , nozzle , mechanics , inlet , circulation (fluid dynamics) , volumetric flow rate , flow (mathematics) , tube (container) , materials science , thermodynamics , physics , mechanical engineering , engineering , composite material
A 20 cm diameter semi‐cylindrical spout‐fluid bed with a draft tube has been used to study the effects of operating and geometric parameters on the solids circulation rates at ambient temperature. A new technique has been developed for measuring the solids fluxes with great accuracy. Solids circulation rate data have been found to be strongly influenced by both geometry and relative magnitude of spouting and auxiliary gas flowrates, as they in turn affect the flow of the gas‐solid mixture inside the draft tube. The solids circulation rate was greatly enhanced when an auxiliary flow aerated the annular region and such enhancement has been found to be linearly dependent on the auxiliary flow contribution to the total gas flow and on the distance between the base of the draft tube and the inlet nozzle.