摘要
在中东富油地区,重油常作为工业燃料使用.为了研究重油在水泥生产燃烧过程中NOx的生成情况,以6000t/d的TTD型分解炉为研究对象,通过FLUENT的UDF(自定义函数)建立数学模型将石灰石分解反应、燃料的燃烧反应以及NOx的生成与还原反应耦合在一起.重点研究重油在分解炉内NOx的生成和还原过程及其内部流场、温度场和组分场分布,分析重油燃烧过程.模拟结果与实际工程数据对比误差低于5%,表明所选用的数学模型和各反应之间的耦合方法能够比较精确地模拟炉内的流场和化学反应,为下一步研究降低重油燃烧产生的NOx提供理论基础.
In the oil-rich areas of the Middle East,heavy oil is often used as industrial fuel.In order to study the formation of NOx during the combustion process of heavy oil in cement production,a 6000t/d TTD calciner is taken as the research object.A mathematical model is established through compiling User Defined Functions(UDFs)in FLUENT,which couples the calcination reaction of limestone,combustion reaction of fuel,as well as the NOx formation and reduction.In particular,the NOx formation and reduction together with the distributions of internal flow field,temperature field,and chemical component field are studied,and the combustion of heavy oil is analyzed.The error between simulation results and actual engineering data is less than 5%,which shows that the selected mathematical model and the coupling method for different reactions can accurately simulate the flow field and chemical reaction in the furnace,providing a theoretical basis for further research on reducing the NOx produced by heavy oil combustion.
作者
毛娅
陈响
陈作炳
江智
Mao Ya;Chen Xiang;Chen Zuobing;Jiang Zhi(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2021年第3期255-262,共8页
Journal of Combustion Science and Technology
基金
武汉理工大学企业合作项目(20162h0005).
关键词
分解炉
NOx
重油
数值模拟
多相流
calciner
NOx
heavy oil
numerical simulation
multiphase flow
