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http://dx.doi.org/10.9713/kcer.2011.49.6.790

Analysis of Hydrodynamic Similarity in Three-Phase Fluidized Bed Processes  

Lim, Ho (Department of Chemical Engineering, Chungnam National University)
Lim, Hyun-Oh (Graduate School of Green Energy Technology, Chungnam National University)
Jin, Hae-Ryoung (Department of Chemical Engineering, Chungnam National University)
Lim, Dae-Ho (Department of Chemical Engineering, Chungnam National University)
Kang, Yong (Department of Chemical Engineering, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.49, no.6, 2011 , pp. 790-797 More about this Journal
Abstract
Hydrodynamic similarity was analyzed by employing scaling factor in three phase fluidized beds. The scaling factor was defined based on the holdups of gas, liquid and solid particles and effectivity volumetric flux of fluids between the two kinds of fluidized beds with different column diameter. The column diameter of one was 0.102 m and that of the other was 0.152 m. Filtered compressed air, tap water and glass bead of which density was 2,500 kg/$m^3$ were used as gas, liquid and solid phases, respectively. The individual phase holdups in three phase fluidized beds were determined by means of static pressure drop method. Effects of gas and liquid velocities and particle size on the scaling factors based on the holdups of each phase and effective volumetric flux of fluids were examined. The deviation of gas holdup between the two kinds of three phase fluidized beds decreased with increasing gas or liquid velocity but increased with increasing fluidized particle size. The deviation of liquid holdup between the two fluidized beds decreased with increasing gas or liquid velocity or size of fluidized solid particles. The deviation of solid holdup between the two fluidized beds increased with increasing gas velocity or particle size, however, decreased with increasing liquid velocity. The deviation of effective volumetric flux of fluids between the two fluidized beds decreased with increasing gas velocity or particle size, but increased with increasing liquid velocity. The scaling factor, which was defined in this study, could be effectively used to analyze the hydrodynamic similarity in three phase fluidized processes.
Keywords
ThreePhase; Fluidized Bed; Similarty; Hydrodynamic; Scale Factor;
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Times Cited By KSCI : 2  (Citation Analysis)
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