• 作者： Hwang, Shyh-Jye; Chiou, Shean-Neng
• 中文摘要： 本文研究氣-液-固半流體化床中固定床高及液相的軸向分散特性。在實驗中使用直徑8公分與15公分的圓管及三種不同粒子: 2毫米和3毫米的玻璃珠與4毫米的聚氯乙烯圓柱粒子。固定床高可用尺量得,而液相的軸向分散特性是由瞬間注入之飽和氯化鈉溶液的反應曲線求得。固定床高及液相分散程度隨著氣相及液相流速增加而增加,但隨著床直徑增加而降低。半流體化床可由結合邊界條件為閉-開之流體化床與邊界條件為開-開之固床而得,以此模式可預測由實驗得到的液相分散特性。
• 英文摘要： The axial dispersion characteristics of liquid phase in cocurrent gas-liquid-solid semifluidized beds and the height of the packed bed section were studied. The inside diameter of the semifluidized beds were 8 and 15cm. Three solids were used, namely, 2 and 3mm glass beads and 4mm cylindrical PVC particles. The axial dispersion coefficients of the semifluidized beds were obtained by the impulse input response technique and saturated NaC1 solution was used as the tracer in the experiments. The height of the packed bed section was measured by visualization. A fluidized bed with close-open boundary conditions and a packed bed with open-open boundary conditions can be combined to describe the axial dispersion characteristics of liquid phase in a gas-liquid-solid semifluidized bed.
• 中文關鍵字： 半流體化床; 液相分散; 固定床高
• 英文關鍵字： Semifluidzed Bed; Liquid Dispersion; Packed Bed Height