CAJ | 학술논문

为了研究H2O对燃料N向NO转化各个阶段的影响，采用可沿程取样的沉降炉反应器，研究了一种烟煤在1273 K温度下，O2/N2、O2/CO2以及O2/CO2/H2O气氛下燃烧的燃尽与NO生成的情况。并通过在停留时间为0.2、0.3、0.5、1.1 s与O2浓度为5%、21%及30%情况下的实验来研究H2O对NO生成的影响。实验结果表明，相对于O2/CO2气氛，H2O的添加抑制了NO的生成，且该影响主要集中在燃烧初期挥发分N的氧化过程。随着O2浓度的增加，H2O添加对oxy-coal燃烧方式下NO生成影响加大。
위료연구H2O대연료N향NO전화각개계단적영향，채용가연정취양적침강로반응기，연구료일충연매재1273 K온도하，O2/N2、O2/CO2이급O2/CO2/H2O기분하연소적연진여NO생성적정황。병통과재정류시간위0.2、0.3、0.5、1.1 s여O2농도위5%、21%급30%정황하적실험래연구H2O대NO생성적영향。실험결과표명，상대우O2/CO2기분，H2O적첨가억제료NO적생성，차해영향주요집중재연소초기휘발분N적양화과정。수착O2농도적증가，H2O첨가대oxy-coal연소방식하NO생성영향가대。
The influence of H2O on NO formation during oxy-coal combustion was investigated in a drop-tube furnace. A bituminous coal was selected and burnt at temperature of 1273 K under O2/N2, O2/CO2 and O2/CO2/H2O atmospheres, respectively. At different O2 contents 5%, 21%, and 30%, the samples were analyzed for increasing residence time from 0.2 s to 1.1 s. The results show that NO formation is suppressed by addition of H2O. The mechanism of NO reduction is due to the change of volatile-N chemistry with H2O addition. The H2O influence on homogeneous NO formation goes up with the increase of O2 concentration.