摘要
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。
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.
出处
《广东电力》
2015年第8期15-18,共4页
Guangdong Electric Power
关键词
生物质锅炉
NOx排放浓度
给料均匀性
biomass boiler
NOx emission concentration
oxygen content
primary air rate
feeding uniformity
