Development of a high air preheat low NOx burner: experimental studies aided by computational modelling
Development of a high air preheat low NOx burner: experimental studies aided by computational modelling
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高空气预热低氮氧化物燃烧器的开发：计算模型辅助的实验研究
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Donald Moreland
中科院分区：
文献类型：
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作者：
O. Akinyemi;M. Toqan;J. Beér;A. Syska;J. Thijsson;C. Benson;Donald Moreland
介绍了一种采用射流泵进行烟气再循环并在1100 K空气预热条件下运行的低NOx燃烧器的研制。通过富/贫燃燃烧顺序和烟气再循环的组合，NOx排放达到25 - 50 ppmv（3%O2）和CO排放低于50 ppmv。燃烧器的概念设计后，数学模型被用来确定点火延迟和结合氮物种的转化程度，在富燃料阶段的火焰的燃料当量比，空气预热，烟气再循环和停留时间的影响。此外，从燃烧器的NOx排放量的计算作为一个功能的混合模式的剩余燃烧器空气与富燃料热解的产物。该建模辅助了1.0 MWt实验燃烧器的设计，并指导了麻省理工学院燃烧研究设施的实验研究。基于这些发展，分级空气再循环（星星）燃烧器已安装在金属加工行业的几个高温炉上。
The development of a low NO x burner incorporating a jet pump for flue gas recirculation and operated with 1100 K air preheat is described. NO x emissions of 25 50 ppmv (3% O 2 ) and CO emissions below 50 ppmv are attained by the combination of fuel-rich/fuel-lean combustion sequencing and flue gas recirculation. Following the conceptual design of the burner, mathematical modelling was used to determine the ignition delay and the extent of conversion of bound nitrogen species to molecular nitrogen in the fuel-rich stage of the flame for the effects of the fuel equivalence ratio, air preheat, flue gas recirculation and residence time. Also, the NO x emission from the burner was computed as a function of the mode of admixing the residual burner air with the products of the fuel-rich pyrolysis. The modelling assisted the design of a 1.0 MWt experimental burner and guided the experimental studies In the MIT Combustion Research Facility. Based on these developments, the Staged Air Recirculating (StAR) burner has been installed on several high-temperature furnaces in the metals processing industry.