Measurement of Solids Behaviour in a Fast Fluidized Bed

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Ken-ichi Ishihara¹  the late Takehiko Furusawa¹  Toshinori Kojima¹  Yang Guilin¹ 

[1] Department of Chemical Engineering, The University of Tokyo

关键词: Fluidization;    Circulating Fluidized Bed;    Fast Fluidized Bed;    Particle Velocity;    Slip Velocity;    Axial Dispersion Coefficient;    Holdup of Solids;   

DOI  :  10.1252/jcej.22.341

来源: Maruzen Company Ltd

【 摘 要 】

References(17)Cited-By(11)The velocity and the axial dispersion of solids within a bed (50 mm in inner diameter, 3600 mm in height) with high gas velocity were analyzed by impulse response of tracer particles. FCC-particles (“group A” powder according to Geldart classification) were employed for the present investigation.Local particle velocity at the axis of the bed increased with increased gas velocity, while the fraction of solids decreased. The axial dispersion coefficient within the bed ranged from 1 to 900 cm2/s. This result suggested unsteady and random behaviour of solids within the fast fluidized bed. Local slip velocity at the axis of the bed was mostly larger than the terminal velocity of a single particle.

【 授权许可】

Unknown