Comparison of residence time models for cascading rotary dryers

被引：41

作者：

Cao, WF ^{[1
]}

Langrish, TAG ^{[1
]}

机构：

[1] Univ Sydney, Dept Chem Engn, Sydney, NSW 2006, Australia

来源：

DRYING TECHNOLOGY | 1999年 / 17卷 / 4-5期

基金：

澳大利亚研究理事会;

关键词：

residence time; solids holdup; rotary dryer;

D O I：

10.1080/07373939908917572

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

The predictions of the models of Matchett and Baker (1988), Saeman and Mitchell (1954) and Friedman and Marshall (1949) for the solids residence time in rotary dryers have been compared with both pilot-scale and industrial-scale data. A countercurrent pilot-scale dryer of 0.2 m diameter and 2 m long has been used with air velocities up to 1.5 ms(-1) to measure the residence times of sorghum grain. The average discrepancy for the solids residence time between the predictions and the experiments that were carried out in the pilot-scale rotary dryer is -10.4%. Compared with the models of Friedman and Marshall (1949) and Saeman and Mitchell (1954) for the pilot-scale data obtained here, the Matchett and Baker model is more satisfactory for predicting the solids residence time in this pilot-scale dryer. It has also been found that the model of Matchett and Baker describes the industrial data of Saeman and Mitchell (1954) than the correlation of Friedman and Marshall (1949).

引用

页码：825 / 836

页数：12