HAUNI松散回潮设备热风温度稳定性的研究

为解决HAUNI松散回潮过程控制能力低,热风温度标准偏差大的问题,通过探索合理的预热温度偏差设计,优化热风系统的比例-积分-微分(PID)控制,从而达到降低片烟热风温度的标准偏差。结果表明:调整预热温度偏差对热风温度过程控制影响较大,当预热偏差设定为6K时,有利于在过料初期热风温度能够快速降低至中心值附近;对PID控制参数的调整可以有效控制热风温度的稳定性,当对应PID值分别为3.4、36、12时,批次间热风温度的标准偏差值控制效果最好,研究结果对于提高片烟的质量具有重要的价值。

Research of Stability for Hot-blast Temperature in HAUNI Loosening and Conditioning Equipment

To solve the problem that the control ability of HAUNI loosening and conditioning process is low and standard deviation of hot-blast temperature is large,in this paper, we reduce the standard deviation of the hot-blast temperature by two ways:reasonable design of preheating temperature deviation and optimization of the PID of hot-blast system. The results show that the adjustment of preheating temperature deviation has a great effect on the control of the hot-blast temperature, which drops rapidly to about the center value in the early phase of production when the preheating temperature deviation is 6K, and the adjustment of the PID parameters can effectively control the stability of the hot-blast temperature. When the corresponding PID parameters are 3.4, 36 and 12, the standard deviation value of hot-blast temperature between batches is the best state. This finding has an important value to improve the quality of tobacco.