三相流化床动力学特征的影响因素  

Influential Factors on Dynamic Characteristics of Three-phase Fluidized Bed

作　　者：李鸿莉[1,2] 李阳东[1,2] 李登新[3] 印春生[1,2] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306 [3]东华大学环境科学与工程学院,上海201620

出　　处：《过程工程学报》2014年第2期223-228,共6页The Chinese Journal of Process Engineering

基　　金：国家高技术研究发展计划(863)基金资助项目(编号:2006AA06Z132);教育部科学技术重点基金资助项目(编号:107124)

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(ρ)、质量(q)、表观气速(Ug)、液体粘度(μl)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(εg)增加2%～3%,而固含率(εs)减小2%～4%;其他条件相同,密度大的颗粒εs和εg较小;随q增加,εg降低,εs增加,玻璃珠颗粒每增加100 g,εg减小约2.5%,εs增加约1.5%;随Ug增大或减小,εg和εs亦随之增大或减小;随μl增大或减小,εg和εs亦呈增大或减小趋势.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 （p）, mass （q）, superficial gas velocity （Ug） and liquid viscosity （μ1） 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 （εg） increased 2%-3%, and local solid holdup （εs） decreased 2%-4%. With increasing of p, both εs and εg became smaller, and vice versa. With increasing of q, εg decreased, but 6s increased, with each addition of 100 g glass beads, εs increased about 1.5%, gg decreased about 2.5%. With increasing of Ug, both εg and εs increased. With increasing or decreasing of μ1, εg and εs constantly increased or decreased.

关 键 词：三相流化床 动力学特征 影响因素 气含率 固含率 

分 类 号：TD953[矿业工程—选矿]