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研究生:馮義生
研究生(外文):Yi-Sheng Feng
論文名稱:氣固流體化床粉體流動行為、壓力擾動與分離現象研究
論文名稱(外文):The studies of flow behaviors, pressure fluctuations and segregation phenomena in a gas-solid fluidized bed
指導教授:楊士震毛祚飛
指導教授(外文):Shie-Chen YangTsuo-Fei Mao
學位類別:碩士
校院名稱:建國科技大學
系所名稱:機械工程系暨製造科技研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:78
中文關鍵詞:氣-固流體化床氣泡最小流體化速度壓力擾動分離
外文關鍵詞:gas-solid fluidization bedbubblefluidization velocitypressure fluctuationsegregation
相關次數:
  • 被引用被引用:2
  • 點閱點閱:416
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  • 下載下載:21
  • 收藏至我的研究室書目清單書目收藏:0
本研究建立二維氣-固兩相流體化床設備,實驗量測採用DV攝影機配合影像處理及壓力量測系統,探討氣-固兩相流體化床內粉體流動行為以及流體化床內不同粒徑大小粉體混合物的混合與分離行為,首先使用單孔式氣體分佈器流體化床觀測單一種類粉粒體流體化行為、氣泡形成與壓力擾動特性,並計算氣-固流體化床流體化品質,接著再以多孔式氣體分佈器流體化床探討不同粉體混合物在流體化床中流動行為,計算不同粒子在床體高度上分佈情形,並求出粒子間相對分離率(Se)。實驗結果顯示氣-固兩相流體化床單一床質粒子的流動結構及氣泡產生行為受到空床氣速、粒徑大小及靜床高度影響,粒子流體化品質隨著空床氣速增加而增加,卻隨著靜床高度的增加而降低,而不同粒子間的分離行為與不同粒子最小流體化速度有關。
fluctuations, and calculates the fluidization index of gas-solid fluidized bed. Secondly, the porous gas distribution fluidized is used to examine the flow behaviors of granular mixture, the solid fraction of particles at different altitude of fluidized bed and extracts the relative separative rate(Se). The experimental results showed that the apparently fluidization behaviors and the gas bubbles are affected by the superficial velocity, the particle diameter and the static height of fluidized bed. The fluidization index increases with the gas velocity but decreases with the static height of the bed. The segregation of granular mixtures is related with the minimum fluidization velocity of particles.
中文摘要…………………………I
英文摘要…………………………II
目 錄....................III
表目錄 ..................VI
圖目錄 ..................VII
符號說明 .................XI
第一章 緒論 ..............1
1-1 氣固流體化床簡介 ……1
1-2 文獻回顧 …………………2
1-3研究動機與架構….......6
第二章 實驗方法………………11
2-1 實驗設備 ............11
2-1-1流體化床主體…………12
2-1-2 空氣供給系統………12
2-1-3壓力轉換器…………13
2-1-4 影像攝影系統……14
2-2 實驗參數設計 ……14
2-3 實驗步驟 …………15
2-4 實驗數據分析 ……16
2-4-1最小流體化速度……16
2-4-2壓力擾動統計方法分析………18
2-4-2-1實驗誤差分析……………19
2-4-2-2 頻譜圖分析……………20
2-4-3 流體化品質………………21
2-4-4粒子相對分離率…………22
第三章 結果與討論…………32
3-1氣固流體化床粒子傳輸性質……………32
3-1-1 最小流體化速度……………………32
3-1-2 氣泡流動機制與氣體壓力擾動……35
3-2 流體化床粉體粒子混合物流動分離與混合現象...37
第四章 結論…………………………………………………71
參考文獻……………………………………………………73
作者簡歷.…………………………………………………78
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