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2012 | 33 | 3 | 431-444
Article title

Confined fluidised bed porosity in the light of bubbling-bed models

Content
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EN
Abstracts
EN
Based on hydrodynamic data, Kato-Wen and Kunii-Levenspiel bubbling-bed model parameters, supplemented with assumptions characteristic for tested confined fluidised bed, were analysed. The calculated bubble diameters and the bed composition proved essential influence of inter-particle space of packed compacted component onto fluidisation character. The usability of the conducted model analysis was also confirmed. Finally, it can be concluded that Kunii-Levenspiel and Kato- Wen models with characteristic assumptions (for the tested bed) can be applied for calculation of the confined fluidised bed layer porosity. Discrepancies of ε f value, determined on the basis of the above mentioned bubbling-bed models do not exceed 8% of the error. The model parameters obtained from the matching the model relations to experimental data εf = f(u0) allow an analysis of the fluidisation character as well as gas velocity regime and the fluidised bed structural composition identification. A description of the regime of the process in which confined fluidised bed is characterised with an increase of mass and heat transfer rate is also possible using relation (17) derived in the present study.
Publisher

Year
Volume
33
Issue
3
Pages
431-444
Physical description
Dates
published
1 - 10 - 2012
received
accepted
online
31 - 10 - 2012
Contributors
  • University of Science and Technology, Faculty of Energy and Fuel, al. Mickiewicza 30, 30-059 Cracow, Poland, zabierow@agh.edu.pl
References
  • Baskakov A.P., Lummi A.P., 1963. Hydrodynamics of apparatus for drying materials in fluidized fine-grained pseudo-boiling bed with solid heat carrier. Khim. Prom., 11, 844-846 (in Russian).
  • Buczek B., Geldart D., 1989. Effect of fine particles on properties of fluidised bed. Chem. Proc. Eng., 2, 313-329.
  • Buczek B., Zabierowski P., 2001. Removal of moisture by adsorption in confined fluidised bed. Chem. Proc. Eng., 4, 731-737.
  • Buczek B., Zabierowski P., 2003. Method for conducting adsorption process in solid bed with limited fluidisation. Polish Patent, PL202307.
  • Capes C.E., McIlhinney A.E., 1968. The pseudoparticulate expansion of screen-packed gas fluidised beds. AIChE J., 14, 917-922. DOI: 10.1002/aic.690140617.[Crossref]
  • Ciesielczyk W., 1992. Gas-solid mass transfer in a fluidised-bed drying. Chem. Proc. Eng., 4, 649-656.
  • Donsi G., Ferrari G., Formisani B., 1988. On the segregation mechanism of percolating fines in coarse particle fluidised beds. Powder Technol., 55, 153-158. DOI: 10.1016/0032-5910(88)80098-6.[Crossref]
  • Donsi G., Ferrari G., Formisani B., Longo G., 1990. Confined fluidisation of fine particles: Model and experimental description. Powder Technol., 61, 75-85. DOI: 10.1016/0032-5910(90)80068-A.[Crossref]
  • Dryden, H.L., Schubauer, G.B., 1947. Use of damping screens for reduction of wind tunnel turbulence. J. Aero. Sci., 14, 221-228.[Crossref]
  • Gabor J. D., 1966. Fluidised-packed beds. Chem. Eng. Progr., Symp. Ser. 62, 62, 32-41.
  • Geldart D., 1973. Types of gas fluidisation. Powder Technol., 7, 285-292. DOI: 10.1016/0032-5910(73)80037-3.[Crossref]
  • Kato K., Wen C.Y., 1969. Bubble assemblage model for fluidised-bed catalytic reactors. Chem. Eng. Sci., 24, 1351-1369. DOI: 10.1016/0009-2509(69)85055-4.[Crossref]
  • Kunii D., Levenspiel O., 1991. Fluidisation Engineering, Butterworth-Heinemann, Boston, MA, USA.
  • Michalski J.A., Ziółkowski D., 1999. Aerodynamic characteristics of an organized fluidised system. Chem. Proc. Eng., 20, 89-108.
  • Roes A.W.M., Van Swaaij W.P.M., 1979. Hydrodynamic behaviour of a gas-solid counter-current packed column at trickle flow. Chem. Eng. J.., 17, 81-89. DOI: 10.1016/0300-9467(79)85001-7.[Crossref]
  • Rowe P.N., Partridge B.A., 1965. An x-ray study of bubbles in fluidised beds. Trans. Inst. Chem. Eng., 43, 157-175.
  • Rowe P.N., Partridge B.A., 1997. An x-ray study of bubbles in fluidised beds. Chem. Eng. Res. Des., 75, Suplement, 116-134. DOI: 10.1016/S0263-8762(97)80009-3.[Crossref]
  • Sutherland I.P., Vassilatos G., Kubota H., Osberg G.L., 1963. The effect of packing on a fluidised bed. AIChE J., 9, 437-441. DOI: 10.1002/aic.690090406.[Crossref]
  • Wen-Ching Y., 2003. Handbook of Fluidisation and Fluid Particle Systems. China Particuology. DOI: 10.1016/S1672-2515(07)60126-2.[Crossref]
  • Zabierowski P., 2008. Heat transfer of the adsorption process in a confined fluidised bed. Chem. Proc. Eng., 29, 191-200.
  • Zabierowski P., 2009. Mass transfer in the adsorption process of water vapour in a confined fluidised bed. Chem. Proc. Eng., 30, 389-402.
  • Zabierowski P., 2006. Fluid and fine solid particles distributor for apparatus with confined fluidised bed. Polish Patent, PL208529.
  • Ziółkowski D., Michalski J., Hartman A., Svoboda K., 1989. Porosity of the fluidised phase generated by gas stream within the voids of the beds of spherical elements, and gas pressure drop in the system. Chem. Proc. Eng., 4, 603.
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_v10176-012-0037-7
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