摘要
"十二五"规划加大了对NOx的治理力度,新标准中重点地区NOx排放限值由原来的200 mg·m-3减少到100 mg·m-3.而燃煤锅炉作为NOx的主要排放源,减排刻不容缓.介绍了燃煤锅炉热力型NOx、燃料型NOx和快速型NOx的生成机理.燃烧中控制NOx的方法主要有燃料分级燃烧技术、空气分级燃烧技术、烟气再循环燃烧技术等.燃烧后烟气脱氮技术主要是选择性非催化还原法(SNCR)、选择性催化还原法(SCR)和SNCR+SCR联合脱硝法,并对其优缺点进行比较,讨论适合燃煤电厂的低NOx排放工艺.
The national ＂Twelfth Five-Year Plan＂ has claimed that the government would strengthen emission control of nitrogen oxides （NOx）. The new emission standard specifies the emission limit value of nitrogen oxides in key areas to be 100 mg ~ m-3 instead of the original 200 mg~ m-3 in the old emission standard. It is urgent to mitigate NOx emissions from coal-fired boilers which are the major sources of NOx emissions. This paper briefly described the generation mechanisms of NOx and the major methods for NO~ emission control in combustion processes such as the fuel staged combustion technique, the air staged combustion technique, the flue gas recirculation combustion technique, etc. Flue gas denitrifieation techniques, such as selective non-catalytic reduction （SNCR）, selective catalytic reduction （SCR）, and the combination of SNCR and SCR, were also discussed, and a comparison of those techniques was carried out. In addition, a discussion about appropriate NOx emission control technology for coal-fired power plants was made.
出处
《能源研究与信息》
2013年第3期131-135,共5页
Energy Research and Information
关键词
燃煤锅炉
低氮燃烧
烟气脱硝
NOx
coal-fired boiler
low-NOx combustion
flue gas denitrification
NOx
