２成分粒子系固気流動層における見掛け比重の制御

• 吉田 幹生

  岡山大学大学院自然科学研究科機能分子化学専攻

• 押谷 潤

  岡山大学大学院自然科学研究科機能分子化学専攻

• 小野 敬子

  岡山大学大学院自然科学研究科機能分子化学専攻

• 石指 美紀

  岡山大学大学院自然科学研究科機能分子化学専攻

• 後藤 邦彰

  岡山大学大学院自然科学研究科機能分子化学専攻

書誌事項

タイトル別名

• Control of Apparent Specific Gravity in Binary Particle Systems of Gas-Solid Fluidized Bed

抄録

Fluidized bed medium separation (FBMS) was applied to separate objects with a small specific gravity difference by precisely controlling the apparent specific gravity of gas-solid fluidized bed with binary particle systems. The binary systems of particles with various specific gravities and diameters were employed, and the apparent specific gravity of fluidized bed, g_fb and the dispersion, Δg_fb, were measured by changing the bulk volume fraction of heavier particle, V_hp, and the superficial air velocity, u₀. It was found that g_fb can be controlled by V_hp and u₀ because g_fb varies with the total mass of particles and the bed expansion. On the other hand, since Δg_fb is determined by the extent of segregation of fluidized particles and the fluidization intensity, Δg_fb decreases with reducing the extent of the segregation and the vertical fluctuation of fluidized bed surface. The experimental results showed that practical fluidized conditions for FBMS are in the range of g_fb≈0.5-3.8 and Δg_fb≤0.1. Under these fluidized conditions, plastics with a small difference in specific gravity (0.04-0.24) were almost completely separated at the top and the bottom of the fluidized bed.

収録刊行物

• 粉体工学会誌

  粉体工学会誌 43 (8), 567-576, 2006

  一般社団法人 粉体工学会

キーワード

• Fluidized bed
• Gravity separation
• Binary particle system
• Segregation

詳細情報

• CRID: 1390001204511424896
• NII論文ID: 130003952776
• DOI: 10.4164/sptj.43.567
• ISSN: 18837239
• ISSN: 03866157
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可