烤烟模块化烘烤工艺特征分析

Analysis on Characteristics of Modular Baking Process of Tobacco

为建立基于模块化的烘烤工艺关键参数提取与工艺分析方法,通过传统记录与物联网设备,提取分析重庆市酉阳县不同部位、不同地区烟叶烘烤过程中各模块的干球温度、湿球温度及烘烤时间,并拟合出烘烤工艺曲线,对比分析其烘烤工艺特点。结果表明:酉阳县烘烤总时间中位值集中在215~235 h之间,板溪镇上部叶变黄时间比中部叶长10 h左右,板溪镇上部叶烘烤时间比两罾乡长20 h左右;板溪镇变黄阶段、定色阶段和干筋阶段烘烤时间占比分别为40%、30%、30%,而两罾乡分别为45%、30%、25%;两地干球温度调控相近,湿球温度调控存在差异,中部叶湿球温度随干球温度上升呈阶梯式上升,上部叶呈上升—下降—上升的变化趋势,在变黄后期和定色前期存在0.5℃左右的下降。基于模块化的烘烤工艺关键参数提取方法可较为准确地获取烟叶烘烤过程中各模块的烘烤时间、干球温度及湿球温度等关键参数,为后续智能化烘烤数据库构建与烘烤工艺的优化提供依据。

In order to establish a modular method for extracting and analyzing key parameters of baking processes,by using traditional recording and IoT devices,the dry-bulb temperature,wet-bulb temperature and baking time of each module during the baking process in different parts of tobacco leaves in different regions of Youyang County,Chongqing,were extracted and analyzed.The baking process curve was fitted,and the characteristics of baking process were compared and analyzed.The results showed that the median baking time in Youyang County was concentrated between 215 h and 235 h.The yellowing time of the upper leaves in Banxi Town was about 10 hours longer than that of the middle leaves,and the baking time of the upper leaves in Banxi Town was about 20 hours longer than that of the Liangzeng Town ship.The proportion of baking time during the yellowing stage,coloring stage,and dry gluten stage in Banxi Town was 40%,30%and 30%,respectively,while it was 45%,30%,25%,respectively,in Liangzeng Township.The coloring stage had a longer duration,while the dry gluten stage had a shorter duration.The regulation of dry-bulb temperature in the two place was similar,but there was difference in the regulation of wet-bulb temperature.The wet-bulb temperature in the middle leaves increased in a stepwise manner with the increase of dry-bulb temperature,while the upper leaves showed an upward-downward-upward trend.There was a decrease of about 0.5℃in the late yellowing stage and early coloring stages.A modular method for extracting key parameters of baking process can accurately obtain key parameters such as baking time,dry-bulb temperature,and wet-bulb temperature for each module during the baking process of tobacco leaves,and provide a basis for the construction of intelligent baking databases and optimization of baking processes in the future.