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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 369380, 7 pages
http://dx.doi.org/10.1155/2013/369380
Research Article

Fluidization and Spouting of Fine Particles: A Comparison

Chemical Engineering Department, National Institute of Technology Rourkela, Orissa 769008, India

Received 5 May 2013; Revised 24 September 2013; Accepted 30 September 2013

Academic Editor: Richard Hennig

Copyright © 2013 Pranati Sahoo and Abanti Sahoo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The fluidization characteristics of fine particles have been studied in both the fluidized bed and spouted bed. The effect of different system parameters (viz. static bed height, particle size, particle density and superficial velocity of the fluidizing medium, rotational speed of stirrer, and spout diameter) on the fluidization characteristics such as bed expansion/fluctuation ratios, bed pressure drop, minimum fluidizing/spouting velocity, and fluidization index of fine particles (around 60 micron particle size) have been analyzed. A stirrer/rod promoter has been used in the bed to improve the bed fluidity for fluidization process and spout diameter has been varied for spouted bed. Mathematical expressions for these bed dynamics have been developed on the basis of dimensionless analysis. Finally calculated values of these bed dynamics are compared with the experimentally observed values thereby indicating the successful applications of these developed correlations over a wide range of parameters.