傾斜式循環流體化床之操作限制及設計方法

Operating Limitation and Design Method of Inclined Circulating Fluidized Bed

曾品儒(Pin-Ju Tseng)

指導教授 ： 陳希立

國立臺灣大學/工學院/機械工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201703482

摘要

本研究之目的在於探討傾斜式循環流體化床之操作限制，透過實驗研究在不同外氣狀態及吸濕材參數下，可達成循環定義之最小空床速度與實際操作風速，及其衍生出之單位重量空氣吸附量與除濕量。同時以該實驗結果為依據，訂定流體化床之設計流程。實驗結果首先顯示，通過對床體間流道之循環操作限制於：粒子球形度、靜電、逆風、粒子流量與吸濕材填充厚度等參數。同時床體間流道之循環操作，受吸濕材之材料強度及密度所影響。其次，根據實驗結果，影響可循環之最小空床速度程度較大的參數，為單位面積之平均吸濕材填充重量，呈正相關；而吸濕材種類及吸附床入口狀態影響較小，在風速之解析度為0.5 m/s的情況下，無明顯之影響。最後，根據實驗結果及推測之參數關係，完成循環式流體化床之五步驟設計流程，提供未來產業化之重要參考。

關鍵字

傾斜式循環流體化床 ； 流體化床操作限制 ； 床體間流道設計 ； 可循環之最小風速 ； 流體化床設計流程

並列摘要

The purpose of this study is to discuss operating limitations of inclined circulating fluidized bed. With different conditions of inlet air and parameters of desiccants, minimum of circulating wind speed and related parameters can be found by experiments. And according the results of the experiments, the design method of fluidized bed can also be set out. First, by the observation of the paths between beds, the main reason causing the paths’ jamming can be conjectured to be the sphericity, the static electricity, the direction of the wind in the paths, the flow rate of desiccant particles in the paths and the filling height of desiccant. Besides, the parameters affecting the behavior of desiccant particles in the paths are the material density and strength of desiccants. Second, according to the results of the experiments, the parameter affecting minimum of circulating wind speed most is the average filling amount of desiccants per area, and it presents positive correlation. Finally, according to the results of the experiments and the relations between parameters of beds, the design method of fluidized beds can be set out.

並列關鍵字

inclined circulating fluidized bed ； operating limitation of fluidized beds ； design of the paths between beds ； minimum of circulating wind speed ； design method of fluidized beds

參考文獻

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