片烟增湿与干燥的薄层动力学模型  

Study on thin-layer dynamic models of humidifying and drying of tobacco strips

作　　者：黄锋 陈清 王乐[2] 窦家宇 王苏红 李斌[2] 

机构地区：[1]华环国际烟草有限公司 [2]烟草行业烟草工艺重点实验室郑州烟草研究院

出　　处：《中国烟草学报》2014年第6期34-40,共7页Acta Tabacaria Sinica

基　　金：安徽省烟草专卖局资助项目(20120551010)

摘　　要：为研究不同温湿度条件下烟叶加工中的水分迁移规律,从水分迁移速率、动力学模型及参数应用性三个部分分析了攀枝花C2F片烟的增湿及干燥特性。结果表明,片烟的增湿和干燥都经历升速段、第一降速段和第二降速段三个阶段的速率变化过程,通过逐步提高湿度的控制方法可以避免冷凝吸湿,增强片烟增湿的均匀性;考察了6种薄层动力学模型,其中以Midilli模型对片烟的吸湿和干燥过程拟合效果最好;结合实际复烤生产中的润叶及复烤水分控制区间,发现动力学参数与区间内水分变化时间有很好规律性,对实际生产具有很好的理论和应用参考性。C2F tobacco strips from Panzhihua were investigated on features of humidifying and drying from the perspective of moisture migration rate, dynamic model and parameters application in order to study the law of moisture migration in tobacco strips during processing under different temperature and humidity conditions. Results showed that humidifying and drying of tobacco both experienced a changing process of increasing stage, first decreasing stage and second decreasing stage. According to mechanism analysis it was found that moisture condensation could be avoided and uniformity of tobacco humidifying could be enhanced by increasing humidity gradually. Six thin-layer dynamic models were examined and the model Midilli fit best in both process of humidifying and drying. Dynamic parameters and interval time of moisture change was highly correlated if moisture control of ordering and redrying in the processing was taken into account. Such correlation would render good reference for actual production.

关 键 词：片烟 增湿与干燥 动力学 薄层模型 

分 类 号：TS44[农业科学—烟草工业]