GAS-SOLIDS FLOW IN THE RISER OF A CIRCULATING FLUIDIZED-BED

被引：10

作者：

HE, YH ^{[1
]}

RUDOLPH, V ^{[1
]}

机构：

[1] UNIV QUEENSLAND,DEPT CHEM ENGN,BRISBANE,QLD 4072,AUSTRALIA

来源：

CHEMICAL ENGINEERING SCIENCE | 1995年 / 50卷 / 21期

关键词：

D O I：

10.1016/0009-2509(95)00170-A

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A new approach to the modelling of gross gas-solids flow through the riser in a circulating fluidized-bed system is proposed in this paper. This approach differs from the previous ones, which are Found to be theoretically incorrect based on a fundamental analysis of the riser process hydrodynamics. Starting from the basic principles, the new approach tackles the modelling problem from both energy and momentum balance perspectives. It also identifies that a riser may be operating in two different flow regimes: the entrainment regime and the dragging regime. Experimental results from a compartmented dense-phase circulating fluidized bed, developed for a continuous coal combustion-gasification process, verified the existence of the two flow regimes.

引用

页码：3443 / 3453

页数：11

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