造纸法再造烟叶萃取工段的全自动控制方法  

Automatic Control Method of Extraction in Paper-Making Reconstituted Tobacco

作　　者：许国齐[1] 孙德平[1] 唐向兵[1] 吴志强[1] 王亮[1] 胡美琴 韩斐 

机构地区：[1]湖北中烟工业有限责任公司重组烟叶应用技术研究湖北省重点实验室,湖北武汉430040 [2]浙江双元科技开发有限公司,浙江杭州310015

出　　处：《轻工机械》2014年第5期76-79,共4页Light Industry Machinery

基　　金：中国烟草总公司科技面上项目:重组烟叶在线检测与自控及生产自动化技术研究(2012A004BP04)

摘　　要：为了解决目前再造烟叶萃取工段自动化程度差,产品得率低,能耗大,技术指标存在主观干扰等问题,提出了一种基于西门子S7-400系列PLC的萃取工段全自动控制方法。该方法简化了物料投放过程,原料称重后直接投入碎浆机,PLC监控进水阀状态和供水流量控制固液比(浆料和溶剂质量比);采用3台螺旋挤浆机串联的方式实现固液分离,分离后的液体由PLC判断质量分数,达到设定值时送入精制工序,否则作为下次投料时的溶剂补充。研究结果表明该方法在一定程度上降低了能耗、水耗和生产成本,避免了人为因素对工艺参数的影响,提高了烟草薄片的品质。In order to solve the problem of poor automation degree,low productivity,high energy consumption,subjective interference in reconstituted tobacco extraction section.An automatic control method for extraction section based on Siemens S7-400 series PLC was proposed.This method simplifies the process of material delivery.The raw materials are directly put into pulper after weighing.PLC controls solid-liquid ratio （slurry and solvent mass ratio） by monitoring water valve status and water flow.Three spiral squeeze pulps are used for dehydration.Solvent is delivered to refine if concentration is equal to setting value,otherwise as the next solvent supplement.The result shows that this method reduce energy consumption,water consumption and production costs to some extent,avoid human influence factors on the process parameters,improve the quality of reconstituted tobacco.

关 键 词：烟草工业 造纸法再造烟叶 烟草薄片 萃取工艺 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置] TS724[自动化与计算机技术—控制科学与工程]