Premium
Solids mixing in an expanded top fluid bed
Author(s) -
Avidan Amos,
Yerushalmi Joseph
Publication year - 1985
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690310520
Subject(s) - slugging , fluidization , mixing (physics) , countercurrent exchange , dispersion (optics) , mechanics , tracer , turbulence , flow (mathematics) , homogeneous , fluidized bed , chemistry , thermodynamics , physics , optics , nuclear physics , quantum mechanics
Abstract This study investigated solids mixing of a group A fine powder in a 0.15 m ID expanded top fluid bed with a ferromagnetic tracer. The superficial gas velocity was raised from 0.075 to 1.1 m/s, causing the bed to go through bubbling, slugging, and turbulent fluidization regimes. A countercurrent flow model described the data well at low gas velocities. The bed assumed a more homogeneous appearance at higher gas velocities; a one‐dimensional axial dispersion model was used to correlate the data. Axial dispersion coefficients increased with gas velocity. The data agree well with literature data for low gas velocities.