Characterization of a high-density downer reactor

被引：26

作者：

Chen, HZ ^{[1
]}

Li, HZ ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China

来源：

POWDER TECHNOLOGY | 2004年 / 146卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

high-density downer; solids flux; transient solids concentration; solids concentration distribution;

D O I：

10.1016/j.powtec.2004.07.008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Experiments were carried out in a specially designed circulating fluidized bed with a 5.6-m tall, 0.08 m ID downer, in which the maximal the solids flux 600 kg m(-2) s(-1) and the maximal solids holdup 0.14 have been achieved. The results show that single peak exists in the PDD curves of the solids concentration for low-density operation, and a higher platform is present in the PDD curves for the high-density downer. Solids flux is a key factor that affects the solids holdup while particle properties are other important parameter. The heavier/better fluidity particle could achieve the structure still exists in the high-density downer, but radial solids distribution gradually becomes more uniform with downward distance and with the increase of solids flux. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：84 / 92

页数：9