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The Behavior of Fine Particles in the Powder Particle Fluidized Bed
The powder particle fluidized bed was invented for the processing of fine or very fine particles. In a powder particle fluidized bed, fine powders are continuously fed to a bed in which coarse particles have been fluidized. The fine powders are uniformly dispersed and fluidized in the bed, where they adhere to the surface of the coarse particles. Fine particles are then elutriated from the bed with gas. This study entailed the use of a powder particle fluidized bed to investigate the holdup of fine particles in the bed, the elutriation rate constant of fine particles from the bed, and the average residence time of fine particles in the bed. The holdup of fine particles increased linearly with an increase in the feed rate of fine particles and the holdup of fine particles increased with decrease in gas velocity and the particle size of fine particles. The elutriation rate constant of fine particles increased when fine particle size and gas velocity increased, and decreased when coarse particle size increased. The average residence time of fine particles increased when gas velocity and fine particle size decreased. When fine particle size was smaller than several microns, the average residence time of fine particles in the bed was more than 1,000 times as long as that of the fluidized gas.
The Behavior of Fine Particles in the Powder Particle Fluidized Bed
The powder particle fluidized bed was invented for the processing of fine or very fine particles. In a powder particle fluidized bed, fine powders are continuously fed to a bed in which coarse particles have been fluidized. The fine powders are uniformly dispersed and fluidized in the bed, where they adhere to the surface of the coarse particles. Fine particles are then elutriated from the bed with gas. This study entailed the use of a powder particle fluidized bed to investigate the holdup of fine particles in the bed, the elutriation rate constant of fine particles from the bed, and the average residence time of fine particles in the bed. The holdup of fine particles increased linearly with an increase in the feed rate of fine particles and the holdup of fine particles increased with decrease in gas velocity and the particle size of fine particles. The elutriation rate constant of fine particles increased when fine particle size and gas velocity increased, and decreased when coarse particle size increased. The average residence time of fine particles increased when gas velocity and fine particle size decreased. When fine particle size was smaller than several microns, the average residence time of fine particles in the bed was more than 1,000 times as long as that of the fluidized gas.
The Behavior of Fine Particles in the Powder Particle Fluidized Bed
Kunio Kato (author)
2014
Article (Journal)
Electronic Resource
Unknown
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