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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
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)。~~
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
funnel-shape internal
internal loop three-phase fluidized bed
hydrodynamics
mass transfer
