Improvement of fluidizability of fine powders — a computer study--颗粒学报PARTICUOLOGY

Venkatesh, R. D., Grmela, M., & Chaouki, J. (2005). Improvement of fluidizability of fine powders — a computer study. China Particuology, 3(3), 165-169. https://doi.org/10.1016/S1672-2515(07)60080-3

Improvement of fluidizability of fine powders — a computer study

R. Deiva Venkatesh, M. Grmela, Jamal Chaouki ^*

Chemical Engineering Department, Ecole Polytechnique de Montreal, Montreal, Qué. H3C 3A7, Canada

10.1016/S1672-2515(07)60080-3

Volume 3, Issue 3, June 2005, Pages 165-169

Received 12 January 2005, Accepted 8 April 2005, Available online 27 November 2007.

E-mail: jamal.chaouki@polymtl.ca

Highlights

Abstract

Simulations of the gas fluidization of a cohesive powder were performed using the Stokesian Dynamics method and an agglomeration-deagglomeration model to investigate methods of improving the fluidizability of fine powders. Three techniques (a) high gas velocity (b) vibration-assisted fluidization and (c) tapered fluidizer were used in the simulations which provided detailed information on the bed microscopy such as the motion of 100 particles in a fluidizing vessel along with the formation and destruction of cohesive bonds during collisions. While all three techniques were found to effectively improve the fluidizability of a strongly cohesive powder, we suggest a combination of high velocity fluidization assisted by external vibration of the fluidized bed to minimize entrainment of particles.

Graphical abstract

Keywords

C-particles; fine powders; fluidization; agglomeration; simulation; vibration; collision; improvement

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