功率对空气分级NH_(3)、NH_(3)/CH_(4)火焰排放的影响  

The Effect of Power on the NO_(x) Emission of Air Staged NH_(3),NH_(3)/CH_(4) Flame

作　　者：咸国礼 孔雨晗 姜磊 胡宏斌[3] 张永生[1] XIAN Guoli;KONG Yuhan;JIANG Lei;HU Hongbin;ZHANG Yongsheng(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]中国科学院大学航空宇航学院,北京100049 [3]中国科学院工程热物理研究所,北京100190

出　　处：《工程热物理学报》2024年第6期1634-1642,共9页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2022YFB4003905)。

摘　　要：NH_(3)作为氢能载体,可实现氢能远距离输运。针对NH_(3)燃烧的反应性低、稳定性差、高燃料型NO_(x)排放问题,设计旋流燃烧器和空气分级燃烧室,实验研究功率为5~23 k W的NH_(3)、NH_(3)/CH_(4)扩散火焰NO_(x)排放特性。并采用化学反应器网络(CRN)进行化学动力学模拟,分析排放变化的原因。结果表明:5 kW、Ф_(pri)=1.05的条件下,NH_(3)火焰NO_(x)测量排放最低为114.4×10^(-6)@15%O_(2);随着功率升高,NO_(x)排放增加,且导致燃烧不充分、火焰延长,此时最佳Ф_(pri)提前、燃烧范围减少、NO_(x)进一步增加;本文的CRN更适合模拟预混燃烧的NO_(x)排放,而不是扩散燃烧;功率升高不会改变反应路径,但生成NO的基元反应速率的升高幅度略大于消耗NO的基元反应速率,从而导致NO排放升高.NH_(3) has the potential to be used as a hydrogen carrier for long-distance hydrogen transportation.However,NH_(3) flame has low reactivity,poor stability,and high fuel NOr emission.To address these issues,a swirling burner and air staged liner were designed.The effect of power amplification on NO_(x) emissions was experimentally studied,and chemical reactor network(CRN)was used for numerical analysis.The results showed that the NH_(3) fame NO,was the lowest at 114.4×10^(-6)@15%O_(2) in the case of 5 kW andΦ_(pri)=1.05.Amplifying power causes NO,increased and incomplete combustion which reduces the optimal opri,the combustion range and further increases the NO_(x).Reducing volumetric heat intensity and increasing residence time decrease NO_(x).Moreover,CRN in this study is more suitable for premixed flame rather than non-premixed flame.Amplifying power does not change the reaction path but the increase in reaction rate for generating NO is faster than that for consuming NO,resulting in an increase in NO.

关 键 词：NH_(3)、NH_(3)/CH_(4)火焰 NO_(x)排放 旋流扩散燃烧 空气分级 CRN模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]