Hydrodynamics of slot-rectangular spouted beds: Effect of slot configuration on the local flow structure

Authors

  • Z. Chen,

    1. Department of Chemical & Biological Engineering, University of the British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3
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  • C. J. Lim,

    Corresponding author
    1. Department of Chemical & Biological Engineering, University of the British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3
    • Department of Chemical & Biological Engineering, University of the British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3
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  • J. R. Grace

    1. Department of Chemical & Biological Engineering, University of the British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3
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Abstract

The local flow structure in a slot-rectangular spouted bed column of 300 mm × 100 mm cross-section was investigated with slots of equal area but different length-to-width ratios. Dead-zones, spout shapes, and distributions of pressure, particle velocity, and voidage were explored. The local flow structure of the slot-rectangular spouted bed became similar to conventional spouted beds as the height increased, with spouts from slots of different length-to-width ratios approaching similarity in the upper part of the bed. Static bed height was found to have little influence on the flow in the spout at a given level.

Abstract

On a étudié la structure d'écoulement local dans une colonne à lit jaillissant rectangulaire à fentes d'une section transversale de 300 mm × 100 mm, les fentes étant de surface égale mais les rapports longueur sur largeur différents. Les zones mortes, les formes de bec et les distributions de pression et de vitesse des particules ainsi que le degré de vide ont été explorés. La structure d'écoulement local du lit jaillissant à fentes rectangulaires devient semblable à celle des lits jaillissants conventionnels lorsque la hauteur augmente, les jets des fentes de différents rapports longueur sur largeur approchant une similarité dans la partie supérieure du lit. On a trouvé que la hauteur de lit statique avait peu d'influence sur l'écoulement dans le jet à un niveau donné.

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