摘要
为验证柔和(MILD)燃烧在固体氧化物燃料电池(SOFC)尾气处理中的应用效果,利用验证有效的数值方法开展20 kW级有机燃料SOFC阴阳极尾气柔和燃烧器的数值模拟研究,以燃料利用率86%的SOFC尾气作为研究对象.结果表明,当烟气回流比低于0.5时,可以满足柔和燃烧的热力学条件T_(in)≥T_(si)≥ΔT.圆形燃烧器阴阳极尾气进口切向间隔布局有利于柔和燃烧的实现.对比空气或纯氧尾气扩散燃烧处理工艺,柔和燃烧可以在无需脱水处理条件下保持稳定燃烧,并且在污染物排放方面展现出较大的优势.
In this work,different MILD afterburners directly burning with exhaust gas and vent air of a gross 20 kW SOFC system were numerically studied with a verified numerical method.Realization conditions and key performance of MILD combustors were discussed.If the recirculating ratio r was lower than 0.5,the MILD combustion thermodynamic condition T_(in)≥T_(si)≥ΔT was always met even under the system fuel utilization rate of 86%.Tangential and alternate arrangement of MILD afterburner air and fuel inlets would fulfill thermodynamics conditions and show better performance on mixing and emissions.MILD afterburner emitted fewer pollutants than non-premixed combustion regardless of exhaust gas condensation.MILD oxy-combustion had an advantage over non-premixed oxy-combustion in terms of igniting condition and pollutant emission.
作者
王翰林
张路
季巧
梁怡琪
袁红升
Wang Hanlin;Zhang Lu;Ji Qiao;Liang Yiqi;Yuan Hongsheng(Beijing Institute of Machinery and Equipment,China Aerospace Science and Industry Co.Ltd.,Beijing 100143,China)
出处
《燃烧科学与技术》
北大核心
2026年第1期78-86,共9页
Journal of Combustion Science and Technology
基金
国家重点研发计划资助项目(2017YFB0601900).
关键词
柔和燃烧
合成气燃料电池系统
固体氧化物燃料电池
尾气处理
污染物排放
moderate or intense low-oxygen dilution combustion(MILD)
integrated gasification fuel cell system
solid oxide fuel cell(SOFC)
exhaust gas treatment
pollutant emissions
