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›› 2014, Vol. 14 ›› Issue (2): 223-228.

• 流动与传递 • 上一篇    下一篇

三相流化床动力学特征的影响因素

李鸿莉 李阳东 李登新 印春生   

  1. 上海海洋大学海洋科学学院 东华大学环境科学与工程学院 上海海洋大学海洋科学学院
  • 收稿日期:2013-06-28 修回日期:2014-02-27 出版日期:2014-04-20 发布日期:2014-04-20
  • 通讯作者: 李鸿莉

Influential Factors on Dynamic Characteristics of Three-phase Fluidized Bed

LI Hong-li LI Yang-dong LI Deng-xin YIN Chun-sheng   

  1. College of Environmental Science and Engineering, Donghua University College of Environmental Science and Engineering, Donghua University College of Marine sciences Shanghai Ocean University
  • Received:2013-06-28 Revised:2014-02-27 Online:2014-04-20 Published:2014-04-20
  • Contact: LI Hong-li

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摘要： 利用电导探头测试技术，以不同粒径的玻璃珠颗粒、金精矿、金矿氰化尾渣为固相，空气为气相，不同粘度的液体为液相，对三相流化床中不同测孔的电导率进行测试和计算，系统研究了颗粒粒径(dp)、密度(r)、质量(q)、表观气速(Ug)、液体粘度(ml)等对相含率的影响. 结果表明，dp从0.05 mm增加到0.15 mm，气含率(eg)增加2%~3%，而固含率(es)减小2%~4%；其他条件相同，密度大的颗粒es和eg较小；随q增加，eg降低，es增加，玻璃珠颗粒每增加100 g，eg减小约2.5%，es增加约1.5%；随Ug增大或减小，eg和es亦随之增大或减小；随ml增大或减小，eg和es亦呈增大或减小趋势.

关键词: 三相流化床, 动力学特征, 影响因素, 气含率, 固含率

Abstract: A series of conductivity at different measuring holes in a three-phase fluidized bed were measured by using conductance probe measurement technique, taking glass beads, gold concentrate and gold cyanidation tailing with different diameter particles as solid phase, air as gas phase, and different viscosity liquids as liquid phase. Through calculation, the effects of particle size (dp), density (r), mass (q), superficial gas velocity (Ug) and liquid viscosity (ml) on phase holdups were studied. The results showed that with increasing of dp of glass beads from 0.05 to 0.15 mm, local gas holdup (eg) increased 2%~3%, and local solid holdup (es) decreased 2%~4%. With increasing of r, both es and eg became smaller, and vice versa. With increasing of q, eg decreased, but es increased, with each addition of 100 g glass beads, es increased about 1.5%, eg decreased about 2.5%. With increasing of Ug, both eg and es increased. With increasing or decreasing of ml, eg and es constantly increased or decreased.

Key words: three-phase fluidized bed, dynamic characteristic, influential factor, gas holdup, solid holdup

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