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APPLICATION OF STEREOLOGY FOR TWO-PHASE FLOW STRUCTURE VALIDATION IN FLUIDIZED BED REACTORS

ABSTRACT
Paper describes a novel method for two-phase gas-solid flow structure validation in fluidized bed reactors. Investigation is based on application of stereology techniques. This is an innovative approach in the field of fluidization phenomena research. Study is focused on the analysis of flow structure images, obtained with high-speed visualization of the fluidization process. Fluidization is conducted in transparent narrow channel, where plastic balls are fluidized by air. Applied stereological analysis is grounded on the linear method and on the method of random and directed secants. This enables 2-dimensional image measurement and 3-dimensional stereological extrapolation. The major result is that for each two-phase gas-solid flow structure a set of stereological parameters exists. This enables quantification of the process. It has been found that the observation of inter-relation of all stereological parameters, during the changing of the flow structure, can be used for system control. The basic conclusion is that knowledge about the character of the changes may be used for constant process adjustment for various two phase systems such as gas-solid or gas-liquid.
KEYWORDS
PAPER SUBMITTED: 1970-01-01
PAPER REVISED: 2016-04-07
PAPER ACCEPTED: 2016-04-09
PUBLISHED ONLINE: 2016-05-08
DOI REFERENCE: https://doi.org/10.2298/TSCI151126108A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 4, PAGES [1199 - 1208]
REFERENCES
  1. Wang, S., et al., Experiment and Grey Relational Analysis of Seaweed Particle Combustion in a Fluid-ized Bed, Energy Con. Man., 66 (2013), pp. 115-120
  2. Chalermsinsuwan, B. P., et al., A Computational Fluid Dynamics Design of Carbon Dioxide Sorption Circulating Fluidized Bed, American Inst. Chem. Eng. J., 56 (2010), pp. 2805-2824
  3. Kongporm, P., Gidaspow, D., Compact Fluidized Bed Sorber for CO2 Capture, Particuology, 8 (2010), pp. 531-535
  4. Kongkitisupchai, S., Gidaspow, D., Carbon Dioxide Capture Using Solid Sorbents in a Fluidized Bed with Reduced Pressure Regeneration in a Downer, American Inst. Chem. Eng. J., 59 (2013), pp. 4519-537
  5. Seemann, M. C., et. al., The Regenerative Effect of Catalyst Fluidization Under Methanation Condi-tions, Applied Catalysis A: General, 313 (2006), pp. 14-21
  6. Kunii, D., Levenspiel, O., Design for Physical Systems, Fluidization Engineering, 2nd Edition, Butter-worth-Heinemann, Boston, USA, 1991.
  7. Senadeera, W., et al., Fluidization Characteristics of Moist Food Particles, Int. J. Food Eng., 2 (2006), pp 1-13
  8. Grigorov, P. I., et al., Formulation and Manufacture of Pharmaceuticals by Fluidized-bed Impregnation of Active Pharmaceutical Ingredients onto Porous Carriers, American Inst. Chem. Eng. J., 59 (2013), pp. 4538-552
  9. Davidson, J. F., Harrison, D., Fluidized Particles, University Press, Cambridge, USA, 1963
  10. Davidson, J. F., Harrison, D., Fluidization, Academic Press, New York, USA, 1974
  11. Werther, J., Measurement Techniques in Fluidized Beds, Po. Tech., 102 (1999), 1, pp. 15-36
  12. Saayman, J., Nicol, W., Interphase Mass Transfer of the High Velocity Bubbling Fluidization Regime, Chem. Eng. Research Design, 93 (2015), pp. 213-223
  13. Lackermeier, U., et al., Visualization of Flow Structures Inside a Circulating Fluidized Bed by Means of Laser Sheet and Image Processing, Powder Tech., 114 (2001), 1-3, pp. 71-83
  14. Ulbrich, R., et al., Recognition of Two-phase Flow Patterns with the use of Dynamic Image Analysis, in: Optical Methods and Data Processing in Heat and Fluid Flow (Ed. C. Greated et al.), Professional Engineering Publishing, London, 2002, pp. 207-217
  15. Sofialidis, D., Faltsi, O., Simulation of Biomass Gasification in Fluidized Beds Using Computational Fluid Dynamics Approach, Thermal Science, 5 (2001), 2, pp. 95-105
  16. Hewitt, G. H., Measurement of Two-Phase Flow Parameters, Academic Press, New York, USA, 1978
  17. Molerus, O., Principles of Flow in Disperse Systems, Chapman and Hall, London, UK, 1993
  18. Ryś, J., Stereologia Materiałów (PL) (Material Stereology), Fotobit Design, Kraków, Poland, 1995
  19. Wojnar, L., et al., Praktyka Analizy Obrazu (PL) (Image Analysis Practice), Polskie Towarzystwo Stereologiczne, Kraków, Poland, 2002
  20. Masiukiewicz, M., Anweiler, A., Two-phase Flow Phenomena Assessment in Minichannels for Com-pact Heat Exchangers Using Image Analysis Methods, Energy Con. Man., 104 (2015), pp. 44-54
  21. Crowe, C. T., Multiphase Flow Handbook, CRC Press, Boca Raton, USA, 2006

© 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