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首页> 外文期刊>Journal of Chemical Engineering of Japan >Hold-up of fine particles in a powder-particle spouted bed
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Hold-up of fine particles in a powder-particle spouted bed

机译：粉末颗粒喷射床中细颗粒的滞留

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摘要

Hold-up of cohesive fine particles in a powder-particle spouted bed under continuous fines feeding was investigated. Nine powders, aluminium hydroxide and aluminium oxide materials, ranging in particle size from 0.51 mu m to 3.5 mu m (Group C powders in Geldart's classification) were used. Silica sand particles of 920 mu m in average diameter (Group D powders in Geldart's classification) were used as coarse particles. Cohesive force of the fines was determined by the tensile strength method. The effects of superficial gas velocity, the feed rate of fines, the size of fines and cohesive force among fines on the hold-up of fines in the bed at a steady state were examined experimentally. It is found that fines hold-up is dominated by cohesive force and the effect of operating conditions upon the fines hold-up could be explained from the view point of the cohesive force. [References: 13]
机译：研究了在连续进料细粉的条件下，粉末状喷射床中内聚细粒的滞留情况。使用了九种粉末，氢氧化铝和氧化铝材料，其粒径范围从0.51微米至3.5微米（Geldart分类中的C组粉末）。使用平均直径为920微米的硅砂颗粒（Geldart分类中的D组粉末）作为粗颗粒。细粒的内聚力通过抗张强度方法确定。实验研究了表观气体速度，细粉的进料速度，细粉的大小以及细粉之间的内聚力对床中细粉在稳态下的滞留率的影响。已经发现，细粒滞留量是由内聚力决定的，并且可以从内聚力的角度解释操作条件对细粒滞留量的影响。 [参考：13]

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