多模型内模控制在SCR脱硝系统中的应用  

Application of Multi Model Internal Model Control in SCR Denitration System

作　　者：孟磊 李俊鹏 姜炜[2] 董泽[2] MENG Lei;LI Junpeng;JIANG Wei;DONG Ze(Datang Environment Industry Group Co.,Ltd.,Beijing 100097 ,China;Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation(North China Electric Power University),Baoding 071003,China)

机构地区：[1]大唐环境产业集团股份有限公司,北京100097 [2]河北省发电过程仿真与优化控制工程技术研究中心(华北电力大学),河北保定071003

出　　处：《山东电力技术》2019年第1期47-51,共5页Shandong Electric Power

基　　金：河北省自然科学基金(E2018502111)

摘　　要：选择性催化还原(SCR)方法是目前火电厂广泛采取的脱硝技术。SCR系统的喷氨量不但会对脱硝的效率造成影响,而且过度的喷氨会增加氨气逃逸率,造成环境污染。利用电厂数据,运用多尺度核偏最小二乘(MKPLS)方法建立SCR系统模型,并把SCR模型与多模型内模优化控制相结合,其仿真实验结果表明,相较于一般的PID控制,该方法拥有无可比拟的优势,它实现了喷氨量的精准控制,一方面提高了脱硝效率,另一方面则避免了过度喷氨,既节省了成本,又做到了环保。Selective catalytic reduction(SCR) is a widely used denitrification technology in thermal power plants.The power plant data are used for building the system model via the multi-scale kernel partial least squares(MKPLS).The internal model optimization control is considered for optimizing the control strategy.The simulation results show that this method has significant advantages compared with the general control.It realizes the precise control of ammonia injection quantity.On one hand,it improves the efficiency of denitrification,on the other hand,it avoids excessive ammonia injection,which not only saves the cost,but also achieves environmental protection.

关 键 词：SCR 内模控制 多模型控制:MKPLS 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]