鼓泡床、湍动床固含率的相似分布规律  

Similarity in Radial Profiles of Solids Fraction in Bubbling and Turbulent Fluidized Bed

作　　者：汪智国[1] 魏飞[1] 

机构地区：[1]清华大学化工系

出　　处：《石油化工》1999年第2期87-90,共4页Petrochemical Technology

摘　　要：在内径为４７４ｍｍ的流化床中，采用双光路光纤密度探头分别研究了流化床密相区、稀相区空隙率径向分布，发现无论是在密相区还是在稀相区，鼓泡床、湍动床中的固含率径向分布均比提升管均匀得多。鼓泡床、湍动床中的固含率径向分布符合相似分布规律，即局部固含率与截面平均固含率成正比，仅是径向位置的函数，与操作气速无直接关系。The radial profiles of solids fraction in the dilute phase and dense phase of fluidized bed was studied by a dual beams optical fiber density sensor in a 474mm ID pilot scale fluidized bed.Similarity in radial profiles of solids fraction exists in both dilute and dense phase of the bed,that is,local solids fraction is proportional to average solids fraction,and is a function of radial position,having no direct relation with gas velocity.

关 键 词：鼓泡床 湍动流化床 固含率 流化床 相似分布规律 

分 类 号：TQ051.13[化学工程]