脉冲示踪法测定烟丝在滚筒加工设备中的停留时间分布  

Determination of Residence Time Distribution of Cut Tobacco in Rotary Cylinder by Pulse Tracing Method

作　　者：邓国栋[1] 堵劲松[1] 朱文魁[1] 刘栋 李华杰 徐大勇[1] 李斌[1] 张玉海[1] 

机构地区：[1]中国烟草总公司郑州烟草研究院 [2]广东中烟工业公司 [3]福建中烟工业有限责任公司技术中心

出　　处：《烟草科技》2014年第7期13-16,44,共5页Tobacco Science & Technology

基　　金：科技部科研院所技术开发研究专项资金"滚筒干燥过程模拟软件开发与控制系统研制(212013AK0180)";郑州院科技项目"滚筒叶丝干燥过程的变参数自适应控制(212012CZ0320)";郑州院院长基金项目"配方烟丝中CO2膨胀烟丝检测方法研究与分离装置开发(222013CA0250)"

摘　　要：为了能够使滚筒加工设备中烟丝停留时间分布测定真实准确,选用CO2膨胀烟丝作为示踪物,通过示踪物添加量及方法重复性研究,建立了采用脉冲示踪法研究滚筒加工设备中烟丝停留时间分布的测定方法,利用CO2膨胀烟丝回收率验证了方法的准确度,并分析了滚筒转速和介质流向对烟丝停留时间分布的影响。结果表明:1该方法具有测试方法重复性好、准确度高、应用范围广的特点;2物料在滚筒中的平均停留时间随转速的增加而减少,无因次方差随着滚筒转速的增加而增大;3物料在滚筒中的平均停留时间与介质流向有关,介质顺流时物料停留时间与逆流时相比有所减少。To accurately determine the residence time distribution of cut tobacco in a rotary cylinder, improve the processing quality of tobacco and provide a reference for the design and modification of rotary cylinders, a pulse tracing method was developed by taking CO2 expanded cut tobacco as a tracer. The accuracy of this method was verified by the recovery of CO： expanded cut tobacco. Moreover, the effects of rotating speed of the cylinder and flow direction of medium on the residence time distribution were investigated. The results showed that： 1） The developed method featured good repeatability, high accuracy and wide application range. 2） With the increase of rotating speed of the cylinder, the average residence time of tobacco in cylinder reduced, while the dimensionless variance increased. 3） The average residence time of tobacco in rotary cylinder was affected by the flow direction of medium; tobacco moved faster in a cocurrent cylinder than in a countercurrent cylinder.

关 键 词：停留时间分布 脉冲示踪法 烟丝 滚筒加工设备 

分 类 号：TS452[农业科学—烟草工业]