烟草科技Issue(10)：15-19,5.
干燥介质温湿度条件对片烟干燥动力学特性的影响
Effects of Temperature and Humidity of Drying Medium on Drying Kinetics of Strips
摘要
Abstract
In order to investigate the effects of temperature and relative humidity of drying medium on the strips drying process and obtain effective diffusion coefficient and activation energy which characterized the process of moisture migration, the drying kinetics characteristics of strips of upper and middle tobacco leaves from Henan were researched with an online tobacco heat-moisture property analyzing device. By Fick’s second law, a kinetic model for the moisture migration was established. The results showed that the drying process of strips was dominated by diffusion mechanism. Within the tested range, the effective diffusion coefficient of the tested samples ranged from 1.91×10-11 to 8.63×10-11 m2/s, which increased with the rise of the temperature or the decrease of relative humidity of the drying medium. The mathematical model of drying characteristics of strips influenced by the temperature and humidity of drying medium was obtained by correcting the humidity in Arrhenius formula.关键词
片烟/干燥动力学/动力学模型/有效扩散系数Key words
Strips/Drying kinetics/Kinetic model/Effective diffusion coefficient分类
轻工纺织引用本文复制引用
张建文,辛亚男,李斌..干燥介质温湿度条件对片烟干燥动力学特性的影响[J].烟草科技,2014,(10):15-19,5.基金项目
国家自然科学基金青年科学基金项目“植物多孔介质快速干燥过程微细结构变化的分形特征及对热质传递影响机制”（51306213）。 （）
