基于PID算法的气流烘丝出口含水率控制

Control of Moisture Content at the Outlet of Airflow Drying Based on PID Algorithm

摘要: 昆明卷烟厂制丝线气流烘丝机烟丝出口含水率控制延迟长，滞后大，需操作人员频繁干预调整，烘丝出口含水率偏差大，并且明显高于集团对标值，同时与行业标杆企业比较存在一定差距。因此降低制丝线气流烘丝出口含水率偏差迫在眉睫。本文从制造精益、提升制丝产品内在质量方面着手、深入分析影响气流烘丝出口含水率的关键因素及烘丝机脱水控制原理。明确循环热风温度波动的主要症结，创造性地通过气流烘丝料头料尾分段控制和预估水分恒脱水自适应控制，实现气流烘丝出口含水率控制波动的减少，降低了出口含水率偏差。

Abstract: Kunming Cigarette Factory silk wire air drying machine tobacco export moisture content control delay is long, lag is large, the operator needs frequent intervention adjustment, drying wire export moisture content deviation is large, and obviously higher than the group’s standard value, and there is a certain gap with the industry benchmark enterprises. Therefore, it is urgent to reduce the deviation of moisture content at the outlet of air drying silk. In this paper, the key factors affecting the moisture content at the outlet of air drying wire and the dehydration control principle of the drying machine are analyzed in depth from the aspects of making lean and improving the internal quality of the silk products. The main crux of temperature fluctuation of circulating hot air was identified, and the control fluctuation of water content at the outlet of air drying was reduced and the deviation of water content at the outlet was reduced through the creative control of the head and tail of air drying and the adaptive control of the predicted water constant dehydration.