Dehydration of sugar-beet pulp in superheated steam and hot air

被引：0

作者：

Tang, Z. ^{[3
]}

Cenkowski, S. ^{[1
,2
,3
]}

Muir, W.E. ^{[1
,3
]}

机构：

[1] Department of Biosystems Engineering, University of Manitoba, Winnipeg, Man., Canada

[2] University of Manitoba, Department of Biosystems Engineering, 438 Engineering Bldg., Winnipeg, Man. R3T 5V6, Canada

[3] ASAE

来源：

Transactions of the American Society of Agricultural Engineers | 2000年 / 43卷 / 03期

关键词：

Atmospheric pressure - Dehydration - Hot air heating - Pressure effects - Steam - Sugar beets - Thermal effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The drying characteristics of sugar-beet pulp in superheated steam and hot air at three temperatures (130, 157, and 183 °C) and three velocities (0.24, 0.32, and 0.37 m/s) of drying media (air or steam) under atmospheric pressure were studied. The drying rate was higher and the drying time was shorter in superheated steam than in hot air of the same temperature. The drying rate increased and the drying time decreased with increased temperature for both superheated-steam drying and hot-air drying; however, the effect of temperature on superheated-steam drying was greater than on hot-air drying. At 157 °C, increasing the velocity of the drying medium did not affect the drying characteristics of the samples dehydrated with hot air, but increased the drying rate at moisture contents greater than 0.5 kg/kg dry basis (d.b.) for superheated-steam drying. Sugar-beet pulp dehydrated with either superheated steam or hot air under the same drying conditions (157 °C and 0.32 m/s) had the same water activities.

引用

页码：685 / 689