Modeling solids and gas flow through an L-valve

被引：29

作者：

Daous, MA ^{[1
]}

Al-Zahrani, AA ^{[1
]}

机构：

[1] King Abdulaziz Univ, Dept Chem & Mat Engn, Jeddah 21413, Saudi Arabia

来源：

POWDER TECHNOLOGY | 1998年 / 99卷 / 01期

关键词：

solids flow; gas flow; L-valve; superficial gas velocity; pressure drop;

D O I：

10.1016/S0032-5910(98)00062-X

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An experimental program was conducted to study the flow of particulate solids through an L-valve with air as the regulating medium. Two different size solid granules were used in L-valves of diameters 25, 36, and 50 mm using two horizontal sections length of 170 and 290 mm. For such a simple system in which the feed hopper and the discharge end of the valve are at atmospheric pressure, a mathematical model, based on a modified Ergun equation written for the moving bed in both the downcomer and horizontal sections of the L-valve, can be used to predict the superficial gas velocity in these two sections at any operating conditions of the L-valve. Correlations are also given from which external aeration and the pressure drop across the L-valve can be predicted for any solids flow rate. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：86 / 89

页数：4