锅炉技术2023，Vol.54Issue(6)：34-41,8.
煤粉MILD燃烧NOx生成和还原机理的数值分析
Numerical Analysis on NOx Formation and Reduction Mechanisms for Pulverized Coal MILD Combustion
摘要
Abstract
The combustion and NOx emission characteristics on pulverized coal moderate &intense low oxygen dilution(MILD)combustion of International Flame Research Foundation(IFRF)test system are analyzed by computational fluid dynamics(CFD)method.The effects of different turbulence-chemistry interaction models,volatile combustion mechanisms and char combustion models are compared.By comparing the numerical and experimental values of velocity fields,temperature fields and components fields,the EDC-WD-MSR combined model can better predict pulverized coal MILD combustion.Based on the EDC-WD-MSR model,the NOx formation and reduction for pulverized coal MILD combustion are analyzed.The results show that fuel-NO is dominant in pulverized coal MILD combustion,while thermal-NO,prompt-NO and intermediate-N2 O account for less than 10％.Strong homogeneous and heterogeneous reductions exist in pulverized coal MILD combustion,where the heterogeneous reduction makes fuel-NO accounting for 71.1％of the sum of char-NO and volatile-NO calculated independently.关键词
煤粉燃烧/MILD燃烧/NOx反应路径/NOx生成和还原Key words
pulverized coal combustion/MILD combustion/NOx reaction routes/NOx formation and reduction分类
能源科技引用本文复制引用
宋姝丽,李澜波,周月桂..煤粉MILD燃烧NOx生成和还原机理的数值分析[J].锅炉技术,2023,54(6):34-41,8.基金项目
国家自然科学基金资助项目(51976120 （）
51761125011) （）
