CAJ | 학술논문

为解决W型辐射管NOx 排放过高的状况，运用数值计算的方法，研究了具有两级空气分级的W型辐射管NOx 排放情况，经验证，模型可靠。探讨了不同稀释剂、分级稀释以及高温稀释情况下对NOx 排放的影响规律。分析以N2和CO2作为稀释剂的区别，发现以CO2作为稀释剂更能抑制NOx 生成，在保证火焰稳定的情况下适当增加稀释体积分数可以使出口NOx 降低到4伊10-5以下。通过采用分级稀释，发现二级风与一级风相比，更能减少NOx 排放。通过高温预热空气添加稀释剂的模拟，发现即使空气预热温度达到1000益以上，也可以通过增加稀释体积分数将出口NOx 控制排放在1伊10-4以下。
위해결W형복사관NOx 배방과고적상황，운용수치계산적방법，연구료구유량급공기분급적W형복사관NOx 배방정황，경험증，모형가고。탐토료불동희석제、분급희석이급고온희석정황하대NOx 배방적영향규률。분석이N2화CO2작위희석제적구별，발현이CO2작위희석제경능억제NOx 생성，재보증화염은정적정황하괄당증가희석체적분수가이사출구NOx 강저도4이10-5이하。통과채용분급희석，발현이급풍여일급풍상비，경능감소NOx 배방。통과고온예열공기첨가희석제적모의，발현즉사공기예열온도체도1000익이상，야가이통과증가희석체적분수장출구NOx 공제배방재1이10-4이하。
To cope with the high NOx emission problem of W-shaped radiant tubes, the influence of diluents in two-stage air combustion on the NOx emission of W-shaped radiant tubes was investigated numerically. Calculation results coincide well with data obtained from experiments. The analysis was carried out for 3 cases: different diluents, stepwise dilution, and diluents together with high temperature air. Compared to diluting with N2 , diluting with CO2 produces less NOx . It can reduce the NOx emission blow 4í10 -5 by increasing the diluted volume fraction under the condition of ensuring flame stabilization. By stepwise dilution, the secondary air contributes more to NOx reduction than the primary air. The NOx emission can be controlled under 1í10 -4 by increasing the diluted volume fraction, even if the temperature of preheated air reaches above 1000℃.