Hydrodynamic Characteristics of a Powder-Particle Spouted Bed with Powder Entrained in Spouting Gas

Authors

  • Qunyi Zhu,

    1. Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
    Current affiliation:
    1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
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  • C. Jim Lim,

    1. Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
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  • Norman Epstein,

    Corresponding author
    1. Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
    • Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
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  • Hsiaotao T. Bi

    1. Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver, BC, Canada V6T 1Z4
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Abstract

Spouting of 3.7 mm polyvinyl chloride particles in a cone-based cylindrical column is subjected to entrainment of FCC powder in the spouting air. It is found that the powder entrainment reduces the minimum spouting velocity, increases the bed pressure drop and reduces the maximum spoutable bed height. At any given bed height and value of U/Ums, there is a critical value of powder loading ratio above which spouting gives way to slugging.

Abstract

Le jaillissement de particules de chlorure de polyvinyle dans une colonne cylindrique à base conique a été soumis à un entraînement de poudre de FCC dans l'air jaillissant. On a trouvé que l'entraînement de poudre réduisait la vitesse de jaillissement minimale, augmentait la perte de charge de lit et réduisait la hauteur maximum de lit jaillissant. À toute hauteur de lit et valeur de U/Ums données, il existe une valeur critique du rapport de charge de poudre au-dessus duquel le jaillissement conduit au pistonnage.

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