低固含率气-液-固循环流化床流动特性  

Hydrodynamics in gas-liquid-solids circulating fluidized beds with low solids holdups

作　　者：刘建华[1] 刘明言[1,2] 胡宗定[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]化学工程联合国家重点实验室(天津大学),天津300072

出　　处：《化工学报》2013年第2期504-516,共13页CIESC Journal

基　　金：国家自然科学基金项目(20576091)~~

摘　　要：应用基于互补金属氧化物半导体(complementary metal oxide semiconductor,CMOS)传感器的高速图像采集和处理技术,实验研究了低固含率条件下,低密度大孔吸附树脂固体颗粒气-液-固三相循环流化床的流体力学行为,分析了操作条件、液相物性、颗粒性质等对床内的固体颗粒循环速率、相含率、气泡运动等特性的影响,得到了具有合理物理解释的实验数据和结果。Hydrodynamics in gas-liquid-solids circulating fluidized beds with low solids holdups of resin particles was experimentally investigated with a high-speed image measurement and treatment technique of complementary metal oxide semiconductor. Influences of superficial liquid velocity, particle diameter and density, liquid surface tension and viscosity on the phase holdups, average gas bubble diameter, circulating rate of solids particles both in the riser and in the downer and bubble motions were investigated. Experimental data with reasonable physical explanations of the hydrodynamics of gas-liquid-solids circulating fluidized beds were obtained.

关 键 词：大孔树脂颗粒 气-液-固 循环流化床 动力学 低固含率 

分 类 号：TQ021.1[化学工程]