烟草科技2017，Vol.50Issue(6)：61-67,7.
基于片烟干燥动力学的REA模型与薄层干燥模型的对比
Comparison between REA model and thin layer drying model based on strip drying kinetics
摘要
Abstract
In order to select a kinetic model best fit for the design, optimization and control of tobacco drying process, the drying kinetic behavior of tobacco strips under the conditions of 65 ℃ & RH 15%, 75 ℃ & RH 10%, 85 ℃ & RH 5% was investigated with a humidifier combined with TGA (Thermogravimetric analyzer). The drying behavior of tobacco strips was simulated by REA (Reaction engineering approach) model and eight selected thin layer drying models (semi-empirical or empirical). The results showed that: 1) With the rise of temperature and decrease of humidity, the drying rate of strips raised and the equilibrium moisture content of strips lowered. 2) The drying kinetic curves predicted by REA model well agreed with experimental curves, especially at the stage when the moisture content decreased from 20% to 12%. Among eight thin layer drying models, Two term model was the best for predicting the drying behavior of strips with the highest R2 (determination coefficient) and the lowest RMSE (root mean square error). 3) Thin layer drying model reflected only the kinetic parameters corresponding to specified drying conditions, while in the REA model the temperature and humidity served as variables, it enabled the kinetic parameters in REA model to describe the drying kinetic behavior at any drying condition. 4) REA model was simple in structure, fast and accurate in prediction, more universal and practical than Two term model.关键词
片烟/干燥动力学/湿度发生器/热重技术/REA模型/薄层干燥模型Key words
Strip/Drying kinetics/Humidifier/TGA/REA model/Thin layer drying model分类
轻工纺织引用本文复制引用
陈国钦,李巧灵,陈河祥,曾强,邓惜汝,车黎明,陈晓东,李跃锋..基于片烟干燥动力学的REA模型与薄层干燥模型的对比[J].烟草科技,2017,50(6):61-67,7.基金项目
福建中烟工业有限公司科技项目"干燥工艺对烟丝热解条件下挥发分的影响研究"(FJZYJH201501). （FJZYJH201501）
