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Student Number 91323059
Author Sheng-Ming Ma(馬勝銘)
Author's Email Address s1323059@cc.ncu.edu.tw
Statistics This thesis had been viewed 1512 times. Download 5 times.
Department Mechanical Engineering
Year 2003
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The study of efficiency in granular moving bed filtration
Date of Defense 2004-06-23
Page Count 87
Keyword
  • Cold test
  • Flow Corrective Elements
  • Gas Path
  • High Temperature Gas Cleanup
  • Moving Granular Bed Filter
  • Abstract The main objective of this research is to investigate the relations between the filter efficiency, the pressure drop, and the dust removing process in the granular moving bed filtration. According to our results with cold model filter, the moving granular bed can be operated continuously. The filtration efficiency can be maintained above 99% while the filter pressure drop is stable for the operation in a fixed-bed mode. The filtration efficiency is approximate 95% when filter bed is circulated. The experimental data of particle removing efficiency agree well with the empirical correlation formula by Tardos.
    We also investigated the flow path of gas in a fixed granular bed. Extending the path of gas in the filter bed with the internal elements could enhance the filtration efficiency in a granular bed filter. The effects of shape and position of the saddle-roof flow corrective elements in the granular bed on gas paths are investigates in this study. The results show that the inlet gas is divided into two approximately identical streams: The upper stream travels the granular bed above the flow corrective element and the lower stream flows under the element when the flow corrective element is at an optimal placement. The changes in positions and in design of the flow corrective elements affect the gas passage through the granular bed.
    Table of Content 摘要I
    AbstractII
    致謝III
    目錄IV
    圖目錄V
    表目錄VII
    第一章 前言1
    1-1 背景分析1
    1-2 研究主旨9
    第二章 研究方法12
    2-1 循環式顆粒床過濾器冷模實驗系統12
    2-2 循環式顆粒床過濾器冷模實驗規劃17
    2-2-1 冷模實驗測試17
    2-2-2 冷模實驗分析20
    2-3 循環式顆粒床過濾器冷模實驗測試方法27
    2-4 氣體路徑實驗系統30
    2-5 氣體路徑實驗規劃32
    2-6 氣體路徑實驗方法33
    第三章 實驗結果35
    3-1 顆粒床過濾器冷模實驗結果35
    3-1-1 進口粉塵濃度對於過濾器性能變化的影響35
    3-1-2 以固定床方式測試粉塵粒徑對於過濾器去除效率的影響39
    3-1-3 以循環移動床方式測試粉塵粒徑對於過濾器去除效率的影響45
    3-1-4 過濾器出口粉塵粒徑對於各標準單位範圍之比較52
    3-1-5 單一過濾單元之過濾效率分析54
    3-2 氣體路徑實驗結果57
    3-2-1 無校正單元之氣體路徑實驗(測試編號1)57
    3-2-2 倒V型校正單元之氣體路徑實驗(測試編號2)59
    3-2-3 倒V型校正單元之氣體路徑實驗(測試編號3)61
    3-2-4 倒V型校正單元之氣體路徑實驗(測試編號4)63
    3-2-5 倒V型校正單元之氣體路徑實驗(測試編號5)66
    第四章 結論與檢討69
    第五章 參考文獻71
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    10.Kuo, J. T., Smid, J., Hsiau, S. S., Wang, C. Y., and Chou, C. S., 1998, “Stagnant Zones in Granular Moving Bed Filter for Flue Gas Cleanup,” Filtration and Separation, Vol. 35, No. 6, pp. 529-534.
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    12.Hsiau, S.S., Smid, J., Tsai, F. H., Kuo, J.T., and Chou, C. S., 2003, “Placement of Flow-Corrective Elements in a Moving Granular Bed with Louvered-Walls,” Chemical Engineering and Processing, accepted for publication.
    13.徐毅理,蕭述三,郭景宗,周春禧,彭鏡禹,李宏台,2002,「移動式顆粒床裝置」,中華民國專利公報,010490。
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    15.古政芳,2000,「流動式顆粒床過濾器阻礙物配置之設計」,國立中央大學機械工程研究所。
    16.陳一順,2001,「流動式顆粒床過濾器三維流場觀察及冷性能測試」,國立中央大學機械工程研究所。
    17.馬家駒,2002,「流動式顆粒床過濾器冷性能測試」,國立中央大學機械工程研究所。
    18.賴信璋,2003,「流動式顆粒床過濾器過濾機制研究」,國立中央大學機械工程研究所。
    19.Gal, E., Pfeffer, R., and Tardos, G., 1985, “A Study of Inertial Effects in Granular Bed Filtration,” AIChE Journal, Vol. 31, pp.1093-1104.
    20.Freidlander, S. K., 1977, “Smoke, Dust, and Haze,” in: Fundamentals of Aerosol Dynamics, Wiley, New York, pp. 97-99.
    21.Tardos, G. I., 1997, “Granular Bed Filter,” in: Handbook of Powder Science & Technology, M. E. Fayed and L. Otten, eds., Chapman & Hall, New York, Chapter 17, Part 1, pp. 771-780.
    22.Zevenhoven, C. A. P., 1992, “Particle Charging and Granular Bed Filtration for High Temperature Application,” Chapter 6, PhD Thesis, Delft University of Technology, Delft, The Netherlands.
    23.Zenz, F. A., 1997, “Granular Bed Filter,” in Handbook of Powder Science & Technology, M. E. Fayed and L. Otten, eds., Chapman & Hall, New York, Chapter 17, Part 2, pp. 781-802.
    Advisor
  • Shu-San Hsiau(蕭述三)
  • Files
  • 91323059.pdf
  • disapprove authorization
    Date of Submission 2004-07-15

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