Operating Conditions of Conical Spouted Beds with a Draft Tube. Effect of the Diameter of the Draft Tube and of the Height of Entrainment Zone

The bed stability of conical spouted beds with a nonporous draft tube located at the bottom of the contactor has been studied, and these results have been compared with those obtained without internal devices, under the same experimental conditions. To design the appropriate geometry of the nonporou...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2007-04, Vol.46 (9), p.2877-2884
Main Authors: San José, María J, Alvarez, Sonia, Ortiz de Salazar, Alvaro, Olazar, Martin, Bilbao, Javier
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Fluidization
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Summary:The bed stability of conical spouted beds with a nonporous draft tube located at the bottom of the contactor has been studied, and these results have been compared with those obtained without internal devices, under the same experimental conditions. To design the appropriate geometry of the nonporous draft tube, as well as the height of the entrainment zone without any instability or operating drawbacks in conical spouted beds, the effect of the ratio of the draft tube diameter to the gas inlet diameter, and the height of the entrainment zone on the contactor inlet, on bed stability has been studied. An original correlation for calculation of the minimum spouting velocity in conical spouted beds with a draft tube has been developed, which is also valid for conical spouted beds without internal devices.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie061449p