Solid Circulation in a Spouted Bed with a Draft Tube

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Solid circulation behavior in a cylindrical spouted bed of 0.205 m diameter with a draft tube is studied based on the power spectral analyses of the time series data of pressure fluctuation and optical signals measured by optical fiber probes in the draft tube and the entrainment region. The effects of solid particle size, bed mass and the length of the entrainment region on solid circulation are examined. In the low gas velocity region, solid particles move from the annulus into the gas jet to form clusters and are carried upward in the draft tube with a frequency of 7–10 Hz. In the high gas velocity region, solids flow is in a stable pneumatic convey state. As the particle size increases and the bed mass decreases, the frequency of clusters is reduced by the promotion of gas bypassing, leading to a decrease in solid circulation rates. In the pneumatic transport regime, the larger particle system exhibits a higher solid circulation rate. The extent of the length of the entrainment region decreases the frequency of clusters but increases the solid circulation rate by virtue of increasing the size of clusters.

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  • Journal of chemical engineering of Japan  

    Journal of chemical engineering of Japan 31(5), 842-845, 1998-10 

    The Society of Chemical Engineers, Japan

参考文献:  8件

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被引用文献:  2件

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各種コード

  • NII論文ID(NAID)
    10002066563
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    00219592
  • NDL 記事登録ID
    4588693
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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