Entrainment of heterogeneous particles from gas-fluidized bed

被引：3
|
作者：
Tannous, K. [1 ]
Donida, M. W. [1 ]
Obata, L. A. [1 ]
机构：
[1] Univ Estadual Campinas, Thermal Fluid Dynam Dept, Sch Chem Engn, Campinas, SP, Brazil
来源：
PARTICULATE SCIENCE AND TECHNOLOGY | 2008年 / 26卷 / 03期
基金：
巴西圣保罗研究基金会;
关键词：
entrainment; experimental design; gas-fluidized bed; heterogeneous particles; mixtures; transport disengaging height;
D O I：
10.1080/02726350802028884
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The entrainment of heterogeneous particles in a gas-fluidized bed for particle mixtures of categories A and B according to the Geldart classification was conducted in this study. The experiments were carried out in an acrylic column of 0.092 m diameter. The distributors were perforated plates of up to 5.9% free area fraction. Measurements of pressure gradients were made using 24 pressure taps. Glass beads with particle diameters from 60 to 400 mu m were used. The mixtures were described using the Rosin-Rammler-Bennet granulometric distribution model. The transport disengaging height (TDH) heights were obtained using the Geldart methodology. A 2(5) experimental design was applied relating the dispersion index, mean diameter, solid mass, superficial gas velocity, and free area fraction of the distributor to obtain the TDH heights. Slugging and transition for turbulence regimes characterized the behaviors of fluidized beds. The results showed that TDH heights for heterogeneous particles were dependent on the solid mass and superficial gas velocity.
引用
收藏
页码：222 / 234
页数：13
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