漏斗型导流内构件对内循环三相流化床流体力学与传质特性的影响  

Influence of funnel-shape internals on hydrodynamics and mass transfer in internal loop three-phase fluidized bed

作　　者：韦朝海[1] 李磊[1] 吴锦华[1] 吴超飞[1] 吴景雄[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510640

出　　处：《化工学报》2007年第3期591-595,共5页CIESC Journal

基　　金：国家自然科学基金项目(50278036);广东省自然科学基金重点项目(04105951)。~~

摘　　要：The effects of funnel-shape internals on hydrodynamics and mass transfer in an internal loop three-phase fluidized bed were investigated.Three different kinds of internals were designed which were setup on the top of draft-tube in terms of horizontal angle and outer diameter, and gas hold up, liquid mixing time, liquid circulation velocity and mass transfer coefficient were measured respectively.It was shown that the riser gas holdup and mass transfer coefficient increased by 10% and 15% than that without such an internal, liquid mixing time decreased by 10% to 25%.When the superficial gas velocity was less than 0.5 cm·s-1, liquid circulation velocity increased with the setup of such internals·Liquid circulation velocity decreased when the superficial gas velocity was above 0.5 cm·s-1.In addition, the variation of structural parameters of funnel-shape internals had significant effects on hydrodynamics and mass transfer.The effects of funnel-shape internals on hydrodynamics and mass transfer in an internal loop three-phase fluidized bed were investigated. Three different kinds of internals were designed which were setup on the top of draft-tube in terms of horizontal angle and outer diameter, and gas hold up, liquid mixing time, liquid circulation velocity and mass transfer coefficient were measured respectively. It was shown that the riser gas holdup and mass transfer coefficient increased by 10% and 15% than that without such an internal, liquid mixing time decreased by 10% to 25%. When the superficial gas velocity was less than 0. 5 cm · s^-1 , liquid circulation velocity increased with the setup of such internals. Liquid circulation velocity decreased when the superficial gas velocity was above 0. 5 cm · s^-1. In addition, the variation of structural parameters of funnel-shape internals had significant effects on hydrodynamics and mass transfer.

关 键 词：漏斗型导流内构件 内循环三相流化床 流体力学 传质 

分 类 号：TQ021[化学工程]