响应面法优化烟叶变频烘烤工艺

目的]为优化烟叶的变频烘烤工艺.方法]以烤烟K326的中部叶为研究对象,设置烘烤过程中主变黄温度38℃时期(低风速段)、主失水温度42℃～48℃时期(高风速段)和装烟密度,进行Box-Behnken三因素三水平设计,以烟叶综合品质得分和烘烤时长为评价指标.结果](1)以综合品质得分为评价指标时,低风速段频率和高风...

Optimization of tobacco bulk curing process with frequency conversion by response surface analysis

  Objective  This study aims to optimize the frequency conversion curing process of tobacco leaves.  Methods  By taking the central leaves of flue-cured tobacco K326 as the research object, and setting the main yellowing temperature during the curing process to 38℃ (low wind speed section), the main water loss temperature to 42℃~48℃ (high wind speed section) and the tobacco density, the BoxBehnken three-factor three-level design was carried out. The comprehensive quality score of the tobacco leaf and the flue-curing time were used as evaluation indicators.  Results  (1) When the comprehensive quality score is used as the evaluation index, the frequency of low wind speed section and the frequency of high wind speed section are the main influencing factors. When the frequency of low wind speed section is between 33 Hz to 37 Hz, the frequency of high wind speed section is between 46 Hz to 50 Hz, and a high quality score can be obtained; (2) When the baking time was used as the evaluation index, all three factors have a significant impact on it. A too big or too small fan frequency as well as the increase of loading density will prolong the curing time, and the sequence of factors is high wind speed frequency> smoke density> low wind speed frequency; (3) low wind speed frequency of 34 Hz, high wind speed frequency of 49 Hz, smoke loading density of 59 kg/m3 are ideal optimization parameters to obtain high comprehsive quality score and high curing efficiency.