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Title: Stability and hydrodynamics of conical spouted beds with binary mixtures

Abstract

The application of conical spouted beds with binary mixtures of glass spheres of particle diameters between 1 and 8 mm, in stable operation regime and without segregation, has been studied. The effects of the contactor geometric factors (angle, inlet diameter), of the stagnant bed height, of the mixture composition, and of the gas velocity on bed stability and bed segregation have been analyzed. It has been proven that the correlations proposed in the literature for calculation of the hydrodynamics of spouted beds of cylindrical geometry are not suitable for evaluating the hydrodynamics of the operation with mixtures in conical contactors. Original equations for calculation of the minimum spouting velocity, of the maximum and stable operation pressure drop, and of the bed voidage of minimum spouting have been proposed. In these equations the Sauter mean diameter is used as the characteristic diameter of the mixture. A weighted average value of the (drag force)/(gravity force) ratio is used for calculation of the bed voidage of minimum spouting.

Authors:
; ; ; ;  [1]
  1. Univ. del Pais Vasco, Bilbao (Spain). Dept. de Ingenieria Quimica
Publication Date:
OSTI Identifier:
5718228
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research; (United States)
Additional Journal Information:
Journal Volume: 32:11; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; EBULLATED BED; HYDRODYNAMICS; STABILITY; BINARY MIXTURES; CHEMICAL REACTORS; GASES; GLASS; MECHANICAL PROPERTIES; PARTICLES; PERFORMANCE; VELOCITY; DISPERSIONS; FLUID MECHANICS; FLUIDS; MECHANICS; MIXTURES; 420200* - Engineering- Facilities, Equipment, & Techniques

Citation Formats

Olazar, M, San Jose, M J, Penas, F J, Aguayo, A T, and Bilbao, J. Stability and hydrodynamics of conical spouted beds with binary mixtures. United States: N. p., 1993. Web. doi:10.1021/ie00023a053.
Olazar, M, San Jose, M J, Penas, F J, Aguayo, A T, & Bilbao, J. Stability and hydrodynamics of conical spouted beds with binary mixtures. United States. https://doi.org/10.1021/ie00023a053
Olazar, M, San Jose, M J, Penas, F J, Aguayo, A T, and Bilbao, J. Mon . "Stability and hydrodynamics of conical spouted beds with binary mixtures". United States. https://doi.org/10.1021/ie00023a053.
@article{osti_5718228,
title = {Stability and hydrodynamics of conical spouted beds with binary mixtures},
author = {Olazar, M and San Jose, M J and Penas, F J and Aguayo, A T and Bilbao, J},
abstractNote = {The application of conical spouted beds with binary mixtures of glass spheres of particle diameters between 1 and 8 mm, in stable operation regime and without segregation, has been studied. The effects of the contactor geometric factors (angle, inlet diameter), of the stagnant bed height, of the mixture composition, and of the gas velocity on bed stability and bed segregation have been analyzed. It has been proven that the correlations proposed in the literature for calculation of the hydrodynamics of spouted beds of cylindrical geometry are not suitable for evaluating the hydrodynamics of the operation with mixtures in conical contactors. Original equations for calculation of the minimum spouting velocity, of the maximum and stable operation pressure drop, and of the bed voidage of minimum spouting have been proposed. In these equations the Sauter mean diameter is used as the characteristic diameter of the mixture. A weighted average value of the (drag force)/(gravity force) ratio is used for calculation of the bed voidage of minimum spouting.},
doi = {10.1021/ie00023a053},
url = {https://www.osti.gov/biblio/5718228}, journal = {Industrial and Engineering Chemistry Research; (United States)},
issn = {0888-5885},
number = ,
volume = 32:11,
place = {United States},
year = {1993},
month = {11}
}