Elutriation of Very Fine Particles from Fluidized Bed-Effect of Mean Diameter of Bed Particles.
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- Li Jiliang
- Department of Biological & Chemical Engineering, Gunma University
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- Yamashita Atsushi
- Department of Biological & Chemical Engineering, Gunma University
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- Kato Kunio
- Department of Biological & Chemical Engineering, Gunma University
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The elutriation of fine powders (group C or group A powders in Geldart’s classification) from a fluidized bed of fine-coarse particle mixtures in a steady state is investigated. FCC and alumina particles of 12 μm to 91 μm in diameter (group C and group A powders) were used as fines. Alumina particles of 69 μm to 650 μm in diameter (group A and group B particles) were used as coarse particles. The effects of the weight fraction of powder in the bed, superficial gas velocity, size of fine powder, size of coarse particle, and mean diameter of bed particles on the elutriation rate constant were investigated.<br>The following results are obtained. The elutriation rate constant of group A particles is affected by the properties of the elutriated particles and gas and by operating conditions such as gas velocity. However, the elutriation rate constant of group C powders is not only affected by the above conditions, but also by the weight fraction of the elutriated powder in the bed and sizes of both coarse particles and elutriated powder in the bed, that is, the mean diameter of the bed particles. The elutriation rate constant of group C powders decreases with increases in the mean diameter of bed particles and with decreases in the size of group C powders under the condition of a constant superficial gas velocity. This finding is quite different from that of elutriation of group A or group B particles.
収録刊行物
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- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
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JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 33 (5), 730-739, 2000
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679541206144
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- NII論文ID
- 130000020332
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- NII書誌ID
- AA00709658
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- ISSN
- 18811299
- 00219592
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- NDL書誌ID
- 5542074
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可