CAJ | 학술논문

通过改变氧的体积分数、一次风量和给料均匀性等燃烧调整试验,分析了某生物质电厂锅炉氮氧化物(NOx )排放质量浓度(以下简称“NOx 排放浓度”)大幅度波动的原因。试验结果表明：合理降低炉内氧的体积分数和一次风量,有利于在炉内密相区形成还原性气氛,可以有效降低 NOx 排放浓度；提高入炉燃料颗粒度的均匀性,避免堵料,利于炉内还原性气氛的控制,也可以有效降低 NOx 排放浓度。通过燃烧优化调整后,该电厂的 NOx 排放浓度在83.15 mg/m3上下波动,NOx 排放浓度平均值较试验前减少约36.09 mg/m3。
통과개변양적체적분수、일차풍량화급료균균성등연소조정시험,분석료모생물질전엄과로담양화물(NOx )배방질량농도(이하간칭“NOx 배방농도”)대폭도파동적원인。시험결과표명：합리강저로내양적체적분수화일차풍량,유리우재로내밀상구형성환원성기분,가이유효강저 NOx 배방농도；제고입로연료과립도적균균성,피면도료,리우로내환원성기분적공제,야가이유효강저 NOx 배방농도。통과연소우화조정후,해전엄적 NOx 배방농도재83.15 mg/m3상하파동,NOx 배방농도평균치교시험전감소약36.09 mg/m3。
By means of combustion adjustment experiments on changing volume fraction of oxygen,primary air quantity, feeding uniformity,and so on,reason for large fluctuation of NOx emission mass concentration of the boiler of some biomass power plant.Experimental results indicate that reasonable reduction of volume fraction of oxygen and primary air quantity inside the furnace is in favor of forming reducing atmosphere in dense phase area inside the furnace and effectively reducing NOx emission mass concentration.In addition,improvement of uniformity ofcombustion granularity in the furnace and a-voidance of blocking is good for controlling reducing atmosphere inside the furnace and effectively reducing NOx emission mass concentration.After optimization adjustment of combustion,NOx emission mass concentration of the power plant fluc-tuated at 83.1 5 mg/m3 and average value of NOx emission mass concentration reduced about 36.09 mg/m3 compared with that before experiments.