摘要
分析了循环喷动流化床中固体的循环机理 ,考察了固体循环速率随操作参数和物性参数的变化规律 ,给出可用于设计和操作的综合考虑几何参数。
A 200×50×1 450mm two-dimentional spout-fluidized bed with a central draft tube was used to study the effect of geometry and operating parameters as well as physical properties of material on solids circulation rate. Four different solids and draft tube sizes were used in this study. With increasing gas feed rate,the gap between the draft tube inlet and conical distributor( R ), the draft tube area and the solid circulation rate will be increased. The draft tube hight and the solid partical loading has no effect on solids circulation rate.Two quantitative correlation,derived from the concept of the gravity flow of particals through the gap( R ) and consisting of geometry,operating,as well as material parameter,were proposed for predicting the solids circulation rate and the partical jet hight of this type of bed.
出处
《化学工业与工程》
CAS
2002年第5期349-353,共5页
Chemical Industry and Engineering
基金
国家自然科学基金项目 (2 94 76 2 6 2 )
