Coal-fired utility boiler modelling for advanced economical low-NO_x combustion controller design

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• 作者：Huirong Zhao^a ; ^{230129063@seu.edu.cn} ; Jiong Shen^a ; ^{shenj@seu.edu.cn} ; Yiguo Li^a ; ^{lyg@seu.edu.cn} ; Joseph Bentsman^b ; ^{jbentsma@illinois.edu}
• 关键词：Control-oriented modelling ; Low-NOx combustion ; Boiler thermal efficiency ; Model predictive control
• 刊名：Control Engineering Practice
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：58
• 期：Complete
• 页码：127-141
• 全文大小：1864 K
• 卷排序：58

文摘

This paper focuses on developing a control-oriented coal-fired utility boiler model for advanced economical Low-NOx combustion (ELNC) controller design. Two boiler combustion models are proposed in this paper: one is a mathematical model describing the key dynamics of the real-time boiler thermal efficiency and the furnace one-dimensional NOx concentration distribution under conventional fuel and overfire air operations; the other recast from the first model is a control-oriented grey-box model with a data-driven furnace combustion submodel. Simulation studies on static and dynamic properties of the first mathematical model indicate that the model can function as a real-time simulator for both advanced boiler combustion control laws testing and generating training and validation data for the control-oriented grey-box model. At the end of this paper, the control-oriented grey-box modelling procedure as well as an optional discrete time linear state-space model are summarised to facilitate model-based advanced combustion controllers design.