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Effect of the tube shape on gas and particle flow in spouted beds with a porous draft tube
Author(s) -
Nagashima Hiroshi,
Ishikura Toshifumi,
Ide Mitsuharu
Publication year - 2009
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.20150
Subject(s) - draft tube , conical surface , tube (container) , annulus (botany) , materials science , porosity , mechanics , volumetric flow rate , particle (ecology) , flow (mathematics) , porous medium , composite material , geology , physics , oceanography
Flow characteristics of a spouted bed with a porous draft tube have been investigated experimentally. In this study, both a cylindrical tube and a conical–cylindrical tube were used as the draft tube. As a result, the efficiency of gas–solid contact and solids circulation rate in the bed were considerably improved by inserting a conical–cylindrical porous draft tube into the bed. Moreover, it was confirmed that the gas flow rate through the annulus reached nearly the level of a conventional spouted bed by using conical–cylindrical porous draft tube.