Item B: Bed Operations packed bed & fluidized bed 填充 床與流體化 床. 填充床 (packed bed, fixed bed 固定床 ), 流體化床 (fluidized bed) – solid phase, gas phase, liquid phase 用途 : 吸附 / 吸收 / 蒸餾 (mass transfer 質傳操作 ), 反應 (e.g. 燃燒 / 煆燒 ), ion-exchange bed 逆洗去除雜質 , ….
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Fixedbedtoexpandedbedtominimumfluidizationtopneumatictransport; bubbling fluidization; two-phase theory of fluidization; slurry transport or pneumatic transport
emf and umf: minimum fluidization 對應的狀況
Terminal velocity 的一些經驗式
Forspheres&εm=0.45,terminalvelocity 大約是minimumfluidizationvelocity的50倍, Rep > 103, 則只有7.7倍