循环流化床锅炉纯氨燃烧排放特性模拟  

Simulation on Emission Characteristics of Ammonia Combustion in a Circulating Fluidized Bed Boiler

作　　者：杜炳君 蒋苓 张扬[1] 张海[1] 吕俊复[1] 柯希玮 DU Bingjun;JIANG Ling;ZHANG Yang;ZHANG Hai;LÜJunfu;KE Xiwei(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;Beijing Huairou Laboratory,Beijing 101499,China)

机构地区：[1]清华大学能源与动力工程系,北京100084 [2]北京怀柔实验室,北京101499

出　　处：《动力工程学报》2025年第1期10-18,共9页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(52306251);煤炭分级转化清洁发电协同创新中心资助项目(2022ZFJH04)。

摘　　要：基于循环流化床(Circulation Fluidized Bed, CFB)技术的纯氨燃烧有望高效、低成本地解决氨燃烧面临的火焰传播速度低、燃烧稳定性差等问题,从而助力基于可再生能源的无碳燃料的消纳利用。构建了氨燃烧CFB整体数学模型,同时考虑了氨的均相反应及异相催化反应,探究了纯氨燃烧CFB锅炉的氨逃逸、氮氧化物等排放特性,并分析了床温、过量空气系数、空气分级、燃料分级等运行参数对排放特性的影响。结果表明:直接将常规燃煤CFB锅炉结构与运行策略应用于纯燃氨CFB锅炉会导致较高的氨逃逸与氮氧化物排放体积分数,而适当调整运行参数可以显著改善排放特性。Ammonia combustion with circulating fluidized bed(CFB)technology is expected to address the challenges of its low flame propagation speed and unstable combustion characteristics with high efficiency and low cost,thereby facilitating the utilization of carbon-neutral fuels derived from renewable sources.A comprehensive mathematical model for CFB-based ammonia combustion was developed,incorporating both homogeneous and heterogeneous catalytic reactions of ammonia.The emission characteristics of an ammonia-fired CFB boiler,including ammonia slip and nitrogen oxide emissions,were analyzed alongside the impact of operating parameters such as bed temperature,excess air ratio,air staging,and fuel staging.Results show that directly employing the design and operational strategies of traditional coal-fired CFB boilers for ammonia combustion of CFB boilers results in relatively high levels of ammonia slip and nitrogen oxide emissions.However,suitable adjustment of operating parameters can markedly enhance emission characteristics.

关 键 词：循环流化床 氨燃烧 排放特性 氮氧化物 无碳燃料 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]