MIXING OF LARGE PARTICLES IN 2-DIMENSIONAL GAS-FLUIDIZED BEDS

被引：19

作者：

FAN, LT

CHANG, Y

机构：

[1] Department of Chemical Engineering, Kansas State University, Manhattan, Kansas

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1979年 / 57卷 / 01期

关键词：

D O I：

10.1002/cjce.5450570114

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The fluidization and solids mixing characteristics of very large particles were investigated in a two‐dimensional gas fluidized bed. Bubble or slug induced drift and gross solids circulation appeared to be the predominant solids mixing mechanisms in this large particle bed. The contribution from wake mixing appeared to be negligible and radial mixing was more rapid than axial mixing. Apparently, segregation in the axial direction resulted from preferential transportation of the lighter particles upwards with rising bubbles and from interparticle competition to fill the voidage created by the rising bubbles. No appreciable segregation occurred in the radial direction. A nonstationary random walk model has been developed to characterize mixing and segregation of fluidized large particles. Copyright © 1979 Canadian Society for Chemical Engineering

引用

页码：88 / 97

页数：10

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