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Elutriation characteristics of solids from liquid fluidized bed systems Part II: Prediction of equilibrium bed concentration
Author(s) -
Ganguly U. P.
Publication year - 1982
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450600404
Subject(s) - elutriation , correlation coefficient , thermodynamics , fluidized bed , standard deviation , component (thermodynamics) , degree (music) , binary number , mathematics , chemistry , materials science , chromatography , mechanics , statistics , physics , arithmetic , acoustics
During elutriation of binary mixtures of solids differing in size and/or density, it has been found that the rate of decrease in concentration of the finer/lighter component is very fast at the beginning, falls off gradually and assumes an asymptotic value towards the end. The bed at this latter condition seems to have attained a retentive capacity for finer/lighter particles and this concentration has been termed the equilibrium bed concentration, C E . For all practical purposes, this sets the lower limit which the concentration of the elutriating component in the bed can attain, i.e. the maximum degree of removal of the particles from the system under a given set of operating conditions. Based on the experimental values of C E obtained from concentration versus time plots, an empirical correlation has been proposed as follows:\documentclass{article}\pagestyle{empty}\begin{document}$$ C_E = 16.61\left( {G/G_{me} } \right)^{ - 6.97} \left( {d_1 /d_2 } \right)^{ - 0.29} \left( {\rho _1 /\rho _2 } \right)^{0.36} \cdot \left( {w/W} \right)^{2.01} \left( {H/H_s } \right)^{ - 0.65} $$\end{document}The correlation coefficient and the per cent standard deviation have been calculated to be 0.943 and 20.0, respectively.