目的 为了解决烟丝烘干过程中出现干头干尾过多，造成后续加工浪费的问题，在分析现有文献和现有设备的基础上，对烘丝工艺进行改进。方法 通过对干头干尾产生的原因和来料水分与烘丝温度的关系分析，采用抗滞后MFA控制器实现对温度的控制，并对现有烘丝设备蒸汽、水管路系统进行改造，对料头和料尾部分增加了水、压空双介质喷嘴来增加湿度，以提高烟丝的利用率。结果 经过不断的调试与试运行，使得每批次干头干尾量由原本的0.624%减少为0.16%。结论 通过温度控制改进和加装增湿装置来减少干头干尾量，将项目投入运行。实际运行结果表明，该系统运行可靠，干头干尾量得到明显降低，减少了原材料的浪费，提高了烟丝利用率和卷烟产量。

The work aims to improve the cut tobacco drying process by analyzing the existing literature and existing equipment, so as to solve the problem of waste of subsequent processing caused by an excess of over-dried cut tobacco in the drying process of cut tobacco. Through analysis on the causes for over-dried cut tobacco and the relationship between incoming moisture and cut tobacco drying temperature, an anti-delay MFA controller was adopted to control the temperature and the steam and water pipeline systems of the existing cut tobacco drying equipment were reformed. Water and air-pressure dual-medium nozzles were added to the tobacco head and tail to increase the humidity, so as to improve the utilization rate of cut tobacco. The percentage of over-dried cut tobacco in each batch was reduced from the original 0.624 % to 0.16 % after continuous debugging and trial operation. The project is put into operation by improving temperature control and installing humidifying device to reduce the amount of over-dried cut tobacco. The actual operation results show that, the system runs reliably, the amount of over-dried cut tobacco is significantly reduced, the waste of raw materials is reduced, and the utilization rate of cut tobacco and cigarette yield are improved.