气固搅拌流化床的床层压降  

Pressure Drop in the Gas-Solid Stirred Fluidized Bed

作　　者：李凡[1] 冯连芳[1] 顾雪萍[1] 王凯[1] 刘波[2] 

机构地区：[1]浙江大学化学工程与生物工程学系聚合反应工程国家重点实验室,浙江杭州310027 [2]扬子石油化工股份有限公司,江苏南京210048

出　　处：《高校化学工程学报》2002年第4期384-388,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：国家重点基础研究发展规划项目(G1999064803)

摘　　要：通过测定搅拌流化床的压降与表观气速的关系,研究了搅拌转速和桨叶形式对流化状态的影响。发现水平搅拌桨叶更有利于破碎气泡,增强气固接触;垂直桨叶则趋于诱导气泡的产生与长大。在流态化阶段,床层压降保持定值,该定值与搅拌转速和叶片形式没有关系。The influence of the stirrer speed and the blade shape on the fluidization in the stirred gas-solid fluidized beds was experimentally studied by examining the relationship between the pressure drop and superficial gas velocity. It was found that the horizontal blades can break the bubbles more easily,hence enhance the contact between the gas and the solid particles whereas the vertical blades tend to give rise to bubbles and encourage their growth. At the stage of fluidization,the pressure drop remains constant, and is independent of the stirrer speed and the blade shape.

关 键 词：气固搅拌流化床 流体特性 床层压降 表现气速 流化状态 

分 类 号：TQ051.13[化学工程] TQ027.2