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Baffle‐induced segregation in spouted beds
Author(s) -
Rovero Giorgio
Publication year - 1983
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.5450610311
Subject(s) - baffle , annulus (botany) , fluidization , mixing (physics) , mechanics , materials science , volume (thermodynamics) , mineralogy , fluidized bed , geology , composite material , thermodynamics , physics , quantum mechanics
Segregation of solid materials, differing in density, was detected at the surface of the annulus of a spouted bed when a baffle, preventing mixing with solids from the fountain, was placed above an overflow pipe. Concentrations higher than 90% by volume in the light material could be obtained in the continuous discharge stream from a well mixed bed having an overall light‐solids concentration as low as 3%. The gas velocity in the annulus, exceeding the minimum fluidization velocity of the light component, was shown to be the mechanistic explanation of the phenomenon.