| IMPROVEMENT OF FLUIDIZABILITY OF FINE POWDERS ——A COMPUTER STUDY |
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| 引用本文： | R.DeivaVenkatesh M.Grmela JamalChaouki. IMPROVEMENT OF FLUIDIZABILITY OF FINE POWDERS ——A COMPUTER STUDY[J]. 中国颗粒学报, 2005, 3(3): 165-169 |
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| 作者姓名： | R.DeivaVenkatesh M.Grmela JamalChaouki |
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| 作者单位： | ChemicalEngineeringDepartment,EcolePolytechniquedeMontreal,Montreal,Qud.H3C3A7,Canada |
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| 摘 要： | 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 1 O0 particles in a fluidizing vessel along with the formation and destruction of cohesive bonds dudng 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 extemal vibration of the fluidized bed to minimize entrainment of particles.
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| 关 键 词： | 精细粉末 碳粒子 气体流化工艺 数字仿真 腐蚀应力 |
IMPROVEMENT OF FLUIDIZABILITY OF FINE POWDERS --A COMPUTER STUDY |
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| R. Deiva Venkatesh,M. Grmela and Jamal Chaouki Chemical Engineering Department,Ecole Polytechnique de Montreal,Montreal,Que. HC A,Canada Author to whom correspondence should be addressed.. IMPROVEMENT OF FLUIDIZABILITY OF FINE POWDERS --A COMPUTER STUDY[J]. China Particuology, 2005, 3(3): 165-169 |
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| Authors: | R. Deiva Venkatesh M. Grmela Jamal Chaouki Chemical Engineering Department Ecole Polytechnique de Montreal Montreal Que. HC A Canada Author to whom correspondence should be addressed. |
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| Affiliation: | R. Deiva Venkatesh,M. Grmela and Jamal Chaouki Chemical Engineering Department,Ecole Polytechnique de Montreal,Montreal,Que. H3C 3A7,Canada Author to whom correspondence should be addressed. |
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| 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. |
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| Keywords: | C-particles fine powders fluidization agglomeration simulation vibration collision improvement |
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