滚筒烘丝机控制方法的改进与对比分析

摘要

为了解决目前滚筒烘丝机中以筒壁温度控制出口烟丝含水率对产品质量稳定性造成一定影响的问题,对滚筒式烘丝机叶丝干燥去湿控制方法进行了改进:在现有筒壁温度控制模式的基础上增设一套以调节入口热风风量来实现出口含水率自动控制的热风风量控制模式,并且对两种控制模式进行了试验对比,结果表明:①采用热风风量控制模式,出口叶丝含水率和出口叶丝温度的稳定性较好,且含水率和温度的波动范围较小；②采用热风风量控制模式,对叶丝特征尺寸(de)的下降影响程度较小,而叶丝特征尺寸(de)的稳定性较差,且叶丝特征尺寸(de)的波动范围比采用筒壁温度控制模式的波动范围略大；③两种控制模式下的叶丝感官质量差别不大,香气风格一致,在烟气风格特征上略有差别.%In order to improve the stability of moisture content in output cut tobacco from a cylinder drier with cylinder wall temperature control mode, the control method was improved: an hot air volume control system was added to control the moisture content in dried tobacco by varying the volume of input hot air. The two methods were comparatively experimented, the results showed that: 1 ) the moisture content and temperature of output cut tobacco by hot air volume control mode were stabler with narrower fluctuation ranges; 2) the hot air volume control mode had less impact on characteristic size ( de) of cut tobacco, but the de of the dried tobacco was more variable; 3 ) the sensory quality of the dried tobacco showed little difference between the two, aroma style was of the same, while smoke style character differed slightly.