摘要
为降低燃油注汽锅炉燃烧过程中产生的氮氧化物(NOx)含量,设计了1种适用于重油燃烧的低NOx燃烧器,在0.8MW的卧式炉试验台上进行燃烧试验,研究了中间射流、燃烧区喷水以及烟气再循环等措施对重油燃烧特性以及NOx生成的影响.结果表明:中间射流的速度、喷水量以及烟气再循环率对燃烧稳定性和NOx的生成具有重要的影响,采用50m/s的中间射流速度、25%的喷水量以及20%的烟气再循环率时实现了烟气中NOx排放从原先的865mg/m^3(折算为φ2O=3.5%)降低至508mg/m^3(折算为φO2=3.5%),NOx排放降低41.2%.
To reduce the NOx concentrations generated in the combustion process,a low NOx burner suitable for heavy oil combustion was designed in this study.The effects of measures such as intermediate jet,water spray in the burning zone,and flue gas recirculation on the heavy oil combustion characteristics were studied on an experimental platform with a 0.8MW horizontal furnace.The results show that the velocity of intermediate jet,the amount of water spray,and the flue gas recirculation rate greatly affected the combustion stability and NOx formation. Under an intermediate jet velocity of 50 m/s,a water spray volume of 25%,and a flue gas recirculation rate of 20%,the NOx emission in the flue gas was reduced from the original value of 865 mg/m3(converted to φO2=3.5%)to 508 mg/m^3(converted to φO2=3.5%),a reduction of 41.2%.
作者
丁涛
周俊虎
曹欣玉
孙振龙
刘广义
李云皓
Ding Tao;Zhou Junhu;Cao Xinyu;Sun Zhenlong;Liu Guangyi;Li Yunhao(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China;Pyneo Co.,Ltd,Hangzhou 310012,China)
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2019年第4期340-346,共7页
Journal of Combustion Science and Technology
关键词
重油
低氮燃烧器
中间射流
喷水
烟气再循环
heavy oil
low NOx burner
intermediate jet
water spray
flue gas recirculation
