Particle Hold-up and Elutriation Rate in the Freeboard of Fluid Beds

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Hitoshi Uchida¹  Nobuyoshi Nakagawa¹  Takayuki Takarada¹  Nobuhiro Takamura¹  Shunji Arita¹  Kunio Kato¹ 

[1] Department of Biological and Chemical Engineering, Gunma University

关键词: Particle Hold-up;    Fluidized Bed;    Freeboard;    Elutriation Rate;    Entrainnnent;   

DOI  :  10.1252/jcej.27.79

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Cited-By(11)Based on experimental results from three fluid beds of different cross sections (15 × 15 cm, 8 × 8 cm and 7.1 cm i.d.), the effects of superficial gas velocity, freeboard height, cross sectional area and particle properties on the axial particle hold-up distribution in the freeboard and the elutriation rate from the top of the column were investigated. An entrainment intensity R was proposed for the particles to explain the effect of size distribution and density on the particle hold-up. The particle hold-up was found proportional to R1.87, and increased with increasing freeboard height and cross-sectional area. Empirical equations for both the particle hold-up distribution and for the particle elutriation rate were obtained.

【 授权许可】

Unknown