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Particle velocity and solids circulation rate in a jet‐spouted bed
Author(s) -
Uemaki Osamu,
Tsuji Toshiro
Publication year - 1992
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.5450700514
Subject(s) - annulus (botany) , conical surface , mechanics , jet (fluid) , circulation (fluid dynamics) , particle (ecology) , materials science , volumetric flow rate , geology , physics , composite material , oceanography
Radial distribution of particle velocities, solids circulation rate and radial variation in bed voidage in a jet‐spouted bed were investigated in a 0.2 m diameter conical‐cylindrical column. The upward particle velocity is strongly dependent on gas velocity and its radial profile is the Gaussian. The solids circulation rates are of the same order of magnitude as those in a conventional spouted bed and are proportional to the gas velocity. Estimation of the variation in bed voidage in the radial direction revealed that the annulus voidage of about 0.90 was greater than the spout voidage of around 0.70. This tendency is contrary to that in a conventional spouted bed.