THERMAL SCIENCE

International Scientific Journal

Valentino M. Stojkovski

,

Zvonimir A. Kostić

,

Aleksandar T. Nošpal

DEPENDENCE OF THE TOTAL ENTRAINMENT FLUX UPON THE APPARENT AND THE TOTAL FLUIDIZATION NUMBER

ABSTRACT
Since the fluidization curve of polydispersive materials has a transition area, the apparent and the total minimum fluidization velocity can be defined. Therefore, the dependence of the total entrainment flux upon the apparent and the total fluidization number were investigated. Experiments were performed in 200 mm diameter glass column, with mixtures of coarse and fine particles of silica sand as bed materials. The influence of bed material structure, fluidization number (apparent and total), bubble diameter and freeboard height are taken into consideration in the analysis of the experimentally obtained results for total entrainment flux.
PAPER SUBMITTED: 2000-03-09
PAPER REVISED: 2000-04-15
PAPER ACCEPTED: 2000-05-15
PUBLISHED ONLINE: 2020-08-16
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2000, VOLUME 4, ISSUE Issue 1, PAGES [65 - 73]
REFERENCES
  1. Geldart, D., Elutriation, Fluidization, 2nd edition (Eds. Davidson J.F., Clift R., Harrison D.), Academic Press, 1985, pp. 383-41
  2. George, S. E., Grace, J.R., Entrainment of Particles from a Pilot Scale Fluidized Bed, The Canadian Journal of Chemical Engineering, 59 (1981), pp. 279-284
  3. Large, J. F., Martinie, Y., Bergougnou, M. A., Interpretative Model for Entrainment in a Large Gas Fluidized Bed, Proceedings, International Powder & Bulk Solids Handling & Processing Conference, 1976, pp. 1-28
  4. Lewis, W.K., Gilliland, E. R., Lang, P. M., Entrainment from Fluidized Bed, Ch. Eng. Progress Symposium Series, Vol. 58 (1962), 38, pp. 65-78
  5. Mickovska, A.,Kostić, Z., Stojkovski, V., NoSpal, A., Mathematical Model of the Dependence of Eruption : Bubble Diameter on Total Number of Fluidization in Two Dimensional Fluidized Bed, Proceedings, 1st South East European Symposium, Ohrid, R. Macedonia, 1997, pp. 53-62
  6. Oka, S., Combustion in Fluidized Bed (in Serbian), Jugoslovensko društvo termicara, Beograd, 1994
  7. Kunti, D., Levenspicl, O., Entrainment of Solids from Fluidized Beds: Hold up of Solids in the Freeboard; II Operation of Fast Fluidized Beds, Powder Technology, (1990), 61, pp. 193-206
  8. Stojkovski, V., Elutriation and Entrainment of Particles from Fluidized Bed, M. Sc. Thesis, Faculty of Mechanical Engineering, Skopje,1995
  9. Stojkovski, V., Kostić, Z., Nošpal, A., Bundalevski, T., Parameters Influencing Fluidized Bed Particles Entrainment, Thermal Science, 22 (1996), 4, pp. 269-280
  10. Stojkovski, V., Kostić, Z., Nošpal, A., Mickovska, A., Experimental Determination of Minimum Fluidization Velocity and Bubble Diameter in Two-Dimensional Fluidized Bed, Proc. Fac. Mech. Eng. Skopje, 1 (1997a), No. 16, pp. 91-98
  11. Stojkovski, V., Kostić, Z., Nošpal, A., Particles Flux Distribution in the Fluidized Bed Freeboard, Proceedings, 1st South East European Symposium, Ohrid, R. Macedonia, 1997b, Vol.1, pp. 85-96
  12. Tweddle, T. A., Capes, C. E, Oshberg, G. L., Effect of Screen Packing on Entrainment from Fluidized Beds, Ind. Eng. Chem. Process Des. Develop, 9 (1970), 1, pp. 85-88
  13. Wen, C. Y., Chen, L. H., Fluidized Bed Freeboard Phenomena: Entrainment and Elutriation, AIChE Journal, 28 (1982), 1, 1982, pp. 117-128
PDF VERSION [DOWNLOAD]
DEPENDENCE OF THE TOTAL ENTRAINMENT FLUX UPON THE APPARENT AND THE TOTAL FLUIDIZATION NUMBER

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence