Solids circulation rate in screen-bottomed spouted bed with draft-tube

被引：14

作者：

Hattori, H ^{[1
]}

Nagai, T ^{[1
]}

Ohshima, Y ^{[1
]}

Yoshida, M ^{[1
]}

Nagata, A ^{[1
]}

机构：

[1] Shinshu Univ, Fac Text Sci & Technol, Dept Fine Mat Engn, Ueda, Nagano 3868567, Japan

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 1998年 / 31卷 / 04期

关键词：

gas solids contact; spouted bed; draft-tube; gas inlet nozzle; solids circulation rate;

D O I：

10.1252/jcej.31.633

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The solids circulation rate was measured in a spouted bed without a gas inlet nozzle or orifice, in which the gas was introduced from the screen bottom at uniform velocity over the cross section of the vessel, and compared with that in the nozzle or orifice inlet type spouted bed. The rate in the screen-bottomed spouted bed is significantly greater than that in the nozzle or orifice inlet type. It is found that gas flows from the annulus into the spout through the clearance between the lower end of the draft-tube and the gas inlet screen, and that such a gas flow pattern facilitates the solids circulation in the screen-bottomed spouted bed. It is a useful for a process in which a high rate of solids circulation is required.

引用

页码：633 / 635

页数：3