基于T-S模型的高炉喷煤协同优化控制策略研究  

Research on synergistic optimization control strategy of blast furnace pulverized coal injection based on T-S model

作　　者：崔桂梅[1] 李舒琪 张运强 马祥[2] CUI Guimei;LI Shuqi;ZHANG Yunqiang;MA Xiang(School of Information Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Iron-making Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Nei Mongol,China)

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司炼铁厂,内蒙古包头014010

出　　处：《钢铁研究学报》2022年第3期222-230,共9页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(61763039,61763038)。

摘　　要：高炉炼铁过程通过增煤减焦实现节能减排目标,针对人工操作模式存在主观性、粗糙性和滞后性难以实现增煤减焦的问题,采用上下协同优化控制方法,一方面通过上部提前匹配减焦方式维持高温区热平衡,另一方面通过富氧鼓风保证下部喷入煤粉的高消化率,使煤粉在风口回旋区充分燃烧。进而从控制角度解析描述增煤减焦过程,将铁水温度的稳定控制问题转换为风口回旋区温度的稳定控制问题,提出增煤减焦协同优化控制策略及风口回旋区温度对焦炭和煤粉不同滞后时间的稳定控制策略。首先,建立煤粉燃烧系统的T-S模糊模型,将辨识得到的喷煤最大时延区间进行划分,在不同时延子区间建立T-S模糊子模型;然后,采用并行分布补偿(parallel distributed compensation,PDC)原理设计状态反馈控制器,并基于Lyapunov稳定性理论与线性矩阵不等式(linear matrix inequality,LMI)方法求解出系统稳定的充分条件。仿真实验验证了模型及状态反馈稳定控制器的有效性。In the process of blast furnace ironmaking,the energy conservation and emission reduction target was realized by improving the pulverized coal injection(PCI) ratio and reducing coke charge.Aiming at the problems of subjectivity,roughness and hysteresis in the manual operation mode,which was difficult to improving the PCI ratio and reducing coke charge,the synergistic optimization control method of burden and blast conditioning was adopted.On one hand,the thermal balance of high-temperature zone was maintained by reducing coke charge accordingly in advance.On the other hand,the high digestibility of pulverized coal was ensured by oxygen enriched blast practice,in order to guarantee pulverized coal sufficient combustion in the tuyere raceway.Furthermore,from the perspective of control,the process of improving the PCI ratio and reducing coke charge was formulated,and the stability control problem of temperature of hot metal was transformed into which in the tuyere raceway.And then,the synergistic optimization control strategy by improving the PCI ratio and reducing coke charge and the stable control strategy of temperature in the raceway of tuyeres,which was affected by coke and pulverized coal with different lag time,were put forward.First,the T-S fuzzy model of pulverized coal combustion system was established with the divided maximum lag interval of PCI,which was identified,and T-S fuzzy sub-models were built in different lag time sub-intervals.Then,the state feedback controller was designed based on the principle of parallel distributed compensation(PDC),and sufficient conditions for the stability of the system was solved based on the Lyapunov stability theory and linear matrix inequality(LMI) method.The simulation experiment illustrated the effectiveness of the model and the state feedback stabilization controller.

关 键 词：高炉 喷煤协同优化 热平衡 T-S模糊控制 线性矩阵不等式 

分 类 号：TF538.63[冶金工程—钢铁冶金] TP273[自动化与计算机技术—检测技术与自动化装置]