気固系流動層内の粒子挙動に及ぼす粒子径とリング状バッフルの影響

概要

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Solid flow behavior was examined in fluidized beds without internals and those with ring-shaped baffles which had small cross-sectional area. The following results were obtained. (1) The solid circulation patter was changed by installing baffles. Hower, the mean velocity of descending solids was unchanged. (2) For Geldarts B powder, the mean velocity of descending solids was well correlated by the following equation. vd=26.9× (ρp)-0.5× (u-umf) ×exp (-2.87×103×dp) where ρp is particle density in unit of kg/m3, u superficial gas velocity, umf minimum fluidizing velocity and dp median particle diameter in unit of m.