300 MW机组锅炉低氮燃烧的改造

针对广东粤华发电有限责任公司（以下简称黄埔发电厂）300Ww机组氮氧化物排放浓度高的问题．采用轴向空气分级和径向空气分级的空气分级燃烧技术对锅炉燃烧系统进行了改造。改造后．氮氧化物排放的质量浓度由改造前的600mg m^3降至437.5mg m^3（标准状态下）．已达到GB 13223 2003《火电厂大气污染物排放标准》时该类型锅炉氯氧化物排放的要求。此外．改造对防止炉膛出口产生过大的扭转残余、防止锅炉水冷壁结渣和高温腐蚀也有帮助。

Renovation of Low-oxynitride Combustion for Boiler of 300 MW Unit

In view of the excessive oxynitridc （NOx） emission of a .300 MW unit in Guangdong Yuehua Power Co. . Lid., the combustion system of the boiler was renovated by applying axial and radial air staged combustion technique. After the renovation, the mass conccntration of NO, emission was reduced from 600 mg m^3 to 4.37.5 mg m^3（in normal state）, which satisfied the requirements in Emission Standard of Air Pollutants for Thermal Power Plants （GB 13223 2003）. Further, the rcnowltion is helpful to prevent torsion residual at the outlet of the boiler furnace, slagging of the water wall and high corrosion