摘要
通过对初始含水率分别为28.8%、24.8%和19.9%的玉米进行热风和真空干燥,研究了热风及真空干燥条件下玉米的干燥特性和模型.结果表明:玉米初始含水率越高,同温度下平均干燥速率越大,且真空干燥平均干燥速率大于热风干燥平均干燥速率;热风和真空干燥在干燥的前20 min干燥速率出现最大值;干燥过程中无明显的恒速干燥段,玉米干燥的数学模型符合Page方程.
The drying characteristics and the drying model of maize with the initial moisture content of 28.8%,24.8% and 19.9% were investigated under the hot air condition and the vacuum condition.The results show that the average drying rate is in direct proportion to the initial moisture content of maize at the same temperature;the average drying rate under the vacuum condition is larger than that under the hot air condition;the drying rate reaches the maximal value in 20 min of the hot-air drying and the vacuum drying;no significant constant-rate drying is present in the drying process;and the maize drying mathematical model is in accordance with the Page equation.
出处
《河南工业大学学报（自然科学版）》
CAS
北大核心
2010年第2期9-14,共6页
Journal of Henan University of Technology：Natural Science Edition
基金
国家"十一五"科技支撑计划项目(2006BAD08B06-03)
关键词
玉米
热风干燥
真空干燥
干燥特性
maize
hot-air drying
vacuum drying
drying characteristics
