Enhancement of large‐particle gas‐fluidization by adding liquid
Enhancement of large‐particle gas‐fluidization by adding liquid
复制标题
添加液体增强大颗粒气体流化
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Y. Asako
中科院分区：
文献类型：
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作者：
Y. Nagahashi;Donghyun Lee;J. Grace;N. Epstein;A. Yokogawa;Y. Asako
在某些情况下，通过添加少量液体可以促进气体颗粒的流化，这与许多报道的液体阻碍气固流化的情况相反。只有当颗粒直径大于约3mm，液体和颗粒具有相似的密度（在~ 25%以内），并且颗粒被液体润湿的程度较差时，才会发生增强。当满足这些条件时，液体使最小气体流化速度Ugmf减小，颗粒运动更加剧烈。对于低液体负荷，通过“改进的液体扰动气体模型”可以很好地预测Ugmf和床层压降。
There are circumstances where fluidization of particles by a gas can be promoted by the addition of small quantities of liquid, contrary to many reported cases where liquid impedes gas-solid fluidization. Enhancement occurs only when the particles are larger than about 3 mm in diameter, the liquid and particles have similar densities (within ∼25%), and the particles are poorly wetted by the liquid. When these conditions are met, the liquid causes the minimum gas fluidization velocity Ugmf to decrease and particle motion to be more vigorous. For low liquid loadings, Ugmf and the pressure drop across the bed are then predicted well by a “modified liquid-perturbed gas model.”