水泥生产中喂煤异常的分解炉出口温度先进控制

Advanced Control over Calciner Exit Temperature in Abnormal Coal Feeding in Cement Production

水泥生产系统中,分解炉具有大时滞、强干扰特性,常规控制算法难以实现闭环控制。分解炉常出现实际喂煤量与给定喂煤量严重不符(喂煤异常)的情况,此时,手动控制效果也很不理想,温度常常超限。为此,提出一种基于广义预测控制+动态补偿+负荷补偿的先进控制算法,可以克服分解炉由于大时滞与喂煤异常带来的难控问题。该算法在某水泥厂分解炉上已经成功投运,极大地改善了温度回路的控制品质。

In the cement production system,large time delay and strong interference characterize the calciner and conventional control algorithms is difficult to achieve closed-loop control.The actual coal feeding amount which seriously inconsistent with the given coal feeding amount(coal feeding is abnormal)often troubles the calciner.At this time,the control quality of manual control is unsatisfactory and the temperature of the calciner often exceeds the limit.In this paper,an advanced control algorithm based on generalized predictive control and dynamic compensation and coal feeding compensation was proposed,which can overcome the control problems caused by the large time delay and abnormal coal feeding in the calciner temperature control.This algorithm’s successful operation in a calciner greatly improves the control quality.