对冲燃烧锅炉低氮燃烧改造中2种燃烧器的应用分析Analysis on the Application AireJet and DRB-4Z in Low NOX Burner Retrofit of Opposed Firing Boilers
赵刚,应明良,王磊,茅建波,戴宇宁
ZHAO Gang,YING Mingliang,MAO Jianbo,WANG Lei,DAI Yuning
摘要(Abstract)：
某300 MW机组对冲燃烧锅炉低氮燃烧改造中采用AireJet和DRB-4Z燃烧器,并加装了双风区OFA(燃尽风)喷口。经试验调整,OFA风箱挡板开度在50%~100%区间时对降低NOX的排放值有很好的效果。OFA喷口二次风套筒、中心风挡板开度全开,外二次风叶片角度关小,尽量关小备用燃烧器层的风箱挡板开度,有利于降低NOX排放。在锅炉运行配风方面,OFA风箱挡板50%~100%,AireJet燃烧器层风门开度35%,DRB-4Z燃烧器层风门开度在45%~55%区间,可获得降低NOX的最优效果。在300 MW工况下,省煤器出口NOX排放值由改造前的500~700 mg/m3降低至280 mg/m3以下。
The low NOXAireJet, DAR-4Z burners are used and OFA nozzles in dual air zone are installed in low NOXretrofit of opposed firing boilers of 300 MW units. Through test and adjustment, when OFA box damper opening is between 50% and 100%, the NOXemission can be reduced. To fully open the secondary air bushing at OFA nozzle, damper of the central air, reduce the angle of the external secondary air blade and box damper opening of standby burner can decrease NOXemission. For the air distribution for boiler operation, when the air box damper opens by 50% to 100%, the ventilation door of AireJet burner opens by 35% and that of DRB-4Z burner opens by 45% to 55%, the NOXemission is optimal. In case of 300 MW operating condition, NOXemission at economizer outlet decreases from 500~700 mg/m3before the retrofit to 280 mg/m3or the below.
关键词(KeyWords)：
燃煤锅炉;低氮燃烧;燃烧器;AireJet;DRB-4Z
coal-fired boiler;low NOXcombustion;burner;AireJet;DRB-4Z
基金项目(Foundation):
作者(Author):
赵刚,应明良,王磊,茅建波,戴宇宁
ZHAO Gang,YING Mingliang,MAO Jianbo,WANG Lei,DAI Yuning
DOI: 10.19585/j.zjdl.2014.04.008