基于补偿加水的烘丝入口含水率调控系统的设计

Design of control system for moisture content in tobacco at inlet of tobacco dryer based on water compensation

为解决制丝线烘丝入口含水率控制精度低、批次间波动大等问题,设计了一种基于补偿加水的烘丝入口含水率调控系统。采用松散回潮环节减少加水,片烟增温环节补偿加水的策略,通过多元回归分析,得到片烟增温出口到烘丝入口物料含水率变化关系的回归方程,用于指导片烟增温环节补偿加水目标的设定。以厦门烟草工业有限责任公司生产的“七匹狼(豪情)”牌号卷烟烟丝为对象进行测试,结果表明:系统改进后烘丝入口含水率与工艺标准值的偏差均值降低0.098百分点,低偏差(<0.2%)批次占比提高17.6百分点。该方法可为实现烘丝入口含水率的精确调控提供支持。

To promote the control precision and reduce the inter-batch fluctuation of moisture content in tobacco at the inlet of tobacco dryer in primary processing line,a moisture content control system based on water compensation was designed by way of reducing water addition in loosening and conditioning process and compensating water addition in strip heating process.Through multiple regression analysis,the regression relationship between the moisture content in tobacco at the outlet of strip heating and that at the inlet of drying is obtained and used to guide the setting of water addition in strip heating process.The cut tobacco for“Septwolves(Haoqing)”brand cigarettes was tested in Xiamen Tobacco Industrial Limited Corporation.The results showed that after modification,the mean deviation of the moisture content in tobacco at the inlet of dryer from the technical standard value decreased by 0.098 percentage points,and the proportion of batches with deviation less than 0.2%increased by 17.6 percentage points.This method provides a support for the precise control of moisture content in tobacco before drying.