基于混合建模的水泥生料分解过程动态特性研究  

Research on dynamic characteristics of cement raw meal decomposition process based on hybrid modeling

作　　者：戚子豪 钟文琪[1] 陈曦[1] 周冠文[1] 赵小亮 辛美静 陈翼 朱永长 QI Zihao;ZHONG Wenqi;CHEN Xi;ZHOU Guanwen;ZHAO Xiaoliang;XIN Meijing;CHEN Yi;ZHU Yongchang(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China;Sinoma International Engineering Co.,Ltd.,Nanjing 211106,Jiangsu,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096 [2]中国中材国际工程股份有限公司(南京),江苏南京211106

出　　处：《化工学报》2022年第5期2039-2051,共13页CIESC Journal

摘　　要：为掌握水泥分解炉运行过程的动态特性,采用机理建模与神经网络相结合的方法构建了水泥分解炉一维特性模型,并结合工业数据对该方法的可行性进行验证。结果表明,模型能够准确地计算炉内温度、气体浓度等参数,具有良好的泛化性能。基于所提出的模型,研究了炉内各状态参数的稳态分布特性。此外,对喷煤量、生料下料量、喷氨量以及高温风机转速等操作变量进行阶跃实验,分析上述操作变量改变时分解炉出口温度及出口NO_(x)含量的动态响应情况。研究所得相关动态特性规律可以为控制系统的分析、设计和优化提供参考与依据。In order to understand the dynamic characteristics of cement precalciner,a one-dimensional hybrid model combined of reaction mechanism and neural network was constructed.Feasibility of this method was verified by comparison with industrial data.The results show that the hybrid model can accurately calculate temperature,gas concentration and other parameters in the furnace.Distribution of each parameter along the direction of flue gas flow is consistent with the actual situation.Based on the proposed model,the steady-state distribution characteristics of various state parameters in the furnace were studied.Furthermore,step response tests were carried out.Dynamic responses of temperature and NO_(x) concentration at furnace outlet were researched when the coal feeding rate,limestone feeding rate,ammonia injection rate and other manipulated parameters were changed respectively.The relevant dynamic characteristics obtained from the research can provide reference for the analysis,design and optimization of the control system.

关 键 词：水泥分解炉 混合模型 动态仿真 神经网络 多相反应器 

分 类 号：TQ172[化学工程—水泥工业]