CTD-1气流烘丝机料头阶段燃烧炉温度控制系统的改进  

Modification of temperature control system for combustion furnace inCTD-1 pneumatic cut tobacco dryer at head tobacco drying stage

作　　者：罗旻晖 吴国忠 郭峰 兰志勇 LUO Minhui;WU Guozhong;GUO Feng;LAN Zhiyong(Tobacco Primary Processing Workshop,Xiamen Tobacco Industrial Co.,Ltd.,Xiamen 361022,Fujian,China)

机构地区：[1]厦门烟草工业有限责任公司制丝车间,福建省厦门市361022

出　　处：《烟草科技》2023年第9期100-106,共7页Tobacco Science & Technology

基　　金：福建中烟工业有限责任公司科技项目“基于物联网的设备智能运维研究与应用”(FJZYKJJH2023ZD044)。

摘　　要：为解决CTD-1气流烘丝机料头阶段工艺气体温度波动大、干头烟丝量多等问题,对料头炉温控制系统进行改进。通过增加新一级的PID控制装置和阀位开度检测器,将控制系统原有的单闭环控制回路改进为双闭环串级控制回路,实时获取料头阶段油气配比阀开度并对其进行精准控制;最优匹配下风机频率与燃油阀位呈线性正相关,利用伺服电机依据匹配关系即可对燃油阀位和风机频率进行自动控制;为保障燃油燃烧效率,点火时油气配比阀初始开度设为12%,烘丝过程中最高燃油阀位设为60%。以厦门烟草工业有限责任公司生产的“七匹狼(纯境、厦门)”牌卷烟烟丝为对象进行测试,结果表明:料头炉温控制系统改进后,料头稳定时间减少41 s/批次,料头工艺气体温度极差下降3.4℃,干头质量减少3.0 kg/批次,出口烟丝含水率QI得分提高5分,燃油消耗量减少7 kg/批次。该技术可为提升卷烟品质的稳定性提供支持。In order to reduce temperature fluctuation of the processing gas or minimize the amount of over-dried tobacco at the head tobacco drying stage,the temperature control system for the combustion furnace in a CTD-1 pneumatic cut tobacco dryer at the head tobacco drying stage was modified.By adding a PID controller and a valve opening position monitor,the original single closed-loop control circuit of the control system was replaced by a double closed-loop cascade control circuit to real-timely monitor and accurately control the opening status of the fuel/air proportioning valve at the head tobacco drying stage.Ideally,the opening position of the fuel valve is linearly positively correlated to the fan motor frequency.Therefore,the opening position of the fuel valve and fan motor frequency can be automatically synchronized by a servo motor.To ensure combustion efficiency,the initial opening of the fuel/air proportioning valve at ignition time is set at 12%,and the highest fuel valve position during steady stage of tobacco drying is set at 60%.The modified control system was tested on the cut tobacco for cigarette brand“Septwolves(Chunjing,Xiamen)”in Xiamen Tobacco Industrial Corporation Limited.The results showed that at the head tobacco drying stage,the time for the furnace to approach to its stable temperature was reduced by 41 s/batch,the extreme temperature difference of the processing gas was reduced by 3.4℃,the amount of over-dried tobacco was reduced by 3.0 kg/batch,the QI score for the moisture content in the output tobacco was increased by 5 points,and the fuel consumption was reduced by 7 kg/batch.This technology provides support for promoting the consistency of cigarette quality.

关 键 词：CTD-1气流烘丝机 料头阶段 燃烧炉温度 PID串级控制 燃油阀位 风机频率 

分 类 号：TS432[农业科学—烟草工业]