ON THE NATURE OF TURBULENT AND FAST FLUIDIZED-BEDS

被引：93

作者：

HORIO, M

ISHII, H

NISHIMURO, M

机构：

[1] Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo

来源：

POWDER TECHNOLOGY | 1992年 / 70卷 / 03期

关键词：

Flow of Fluids - Turbulent - Fluid Dynamics - Mathematical Models - Powders - Fluidization;

D O I：

10.1016/0032-5910(92)80058-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Fluidization characteristics have been investigated over the range from bubbling to fast fluidization by using a circulating fluidized bed cold model (riser diameter: 50 mm i.d., riser height: 2 390 mm, powder: fluidized cracking catalyst (FCC) and silica sand). Special focus was placed on the concepts of turbulent and fast fluidization regimes. Based on careful measurements of flow structure and cluster behavior, it is demonstrated that the turbulent fluidization regime is a transition regime between bubbling and fast fluidization. Experimental evidence supports the postulate that in fast fluidization the clusters adjust their size so that the gas drag force acting on them compensates with their gravity.

引用

页码：229 / 236

页数：8