锅炉结构和型式对氮氧化物排放浓度影响的试验

利用不同炉型和燃烧器型式锅炉NO_x排放浓度测量数据，分析了锅炉结构和燃烧器型式对NO_x排放浓度的影响.“W”火焰锅炉NO_x排放浓度最高，其次是四角切圆直流燃烧器锅炉；采用低NO_x燃烧技术的旋流燃烧器锅炉其NO_x排放浓度低于四角切圆燃烧锅炉；循环流化床锅炉由于燃烧温度低，其NO_x排放浓度最低；烧烟煤的四角切圆燃烧锅炉的NO_x排放浓度低于贫煤锅炉.对现有锅炉燃烧器进行改造，可以同时实现锅炉稳燃，提高燃烧效率，降低NO_x排放的目的.

Experimental of effects of boiler structures and burner models on NOx emission from coal-fired boiler

The emissions of boilers with different furnace forms and burners were measured to analyze the effect of boiler structures and burner models on NOx emission.Analysis results show that the NOx emission of W-flame boiler is the highest.The boiler of quadrilateral tangential combustion fashion with direct-current burner is the second.The NOx emission of boiler with revolving combustion burner using low-NOx technology is more lower.The NOx emission of CFB boiler is the lowest,because of its low combustion temperature.The boiler with quadrilateral tangential combustion fashion burning bituminous coal emits less NOx than the boiler burning lean coal.Burner retrofitting on two existing boilers gives positive results on combustion stability,combustion efficiency increase,and NOx emission reduction.