600 MW 亚临界锅炉燃烧器低氮改造与运行优化
刘兵兵¹，冯欣²，杨祖旺²
（1. 四川广安发电有限责任公司，四川 广安 638500；2. 西安格瑞电力科技有限公司，陕西 西安 710000）
摘要：对A 电厂600 MW 亚临界锅炉进行了燃烧器低氮改造。对61^#锅炉燃烧器的改造，在燃用实际煤种的前
提下达到以下效果：明显改善了水冷壁高温腐蚀现象；改善屏式过热器超温现象，减温水量下降10%以上；消除
了燃烧器喷口以及四周水冷壁结焦的问题。对制粉系统进行调试实验，结果表明在600 MW 负荷时可
6台磨煤机同时运行，且每台磨煤机的最大出力为60 t/h；500 MW 负荷时，在现有煤质下可5 台磨煤机同时运
行；燃烧系统改造后现场取样结果表明，炉渣碳质量分数为3.06%，飞灰碳质量分数为5.37%，均下降10%以上，
且在煤质条件一样的前提下，锅炉出口处NO_x质量浓度由原先的600 ～ 700 mg/m³下降至300 ～ 350 mg/m³，有效降
低了脱硝装置的成本，实现了节能环保的目的；配煤燃烧时，新疆煤与本地煤种掺混质量比大于1∶1 时，可有效
防止结焦。因此该次改造具有良好的推广应用价值。
关键词：燃烧系统优化；节能；制粉系统；NO_x
中图分类号：TK223.23 文献标志码：A 文章编号：2095-0802-(2024)01-0074-07
Low Nitrogen Modification and Operation Optimization of 600 MW
Subcritical Boiler Burner
LIU Bingbing¹, FENG Xin², YANG Zuwang²
(1. Sichuan Guang'an Power Generation Co., Ltd., Guang'an 638500, Sichuan, China; 2. Xi'an Grey Power Technology
Co., Ltd., Xi'an 710000, Shaanxi, China)
Abstract: The 600 MW subcritical boiler of a power plant was optimized for low nitrogen burner, and after the
transformation of the 61^# furnace burner, the following effects were achieved under the premise of burning actual coal: the
high temperature corrosion phenomenon of the water wall was significantly improved; Improve the overtemperature
phenomenon of screen superheater, and reduce the amount of temperature reduction by more than 10%; eliminates burner
spouts and surrounding water wall coking. The debugging experiment of the milling system shows that 6 coal mills can be
operated at the same time at 600 MW load, and the maximum output of each mill is 60 t/h. With a load of 500 MW, 5 coal
mills can be operated simultaneously under the existing coal quality. The on-site sampling results after the transformation
of the combustion system showed that the carbon content of the slag was 3.06%, and the carbon content of fly ash was
5.37%, both of which decreased by more than 10%, and under the premise of the same coal quality conditions, the NOx
mass concentration at the boiler outlet decreased from the original 600 - 700 mg/m³ to 300 - 350 mg/m³, which effectively
reduced the cost of the denitration device and achieved the purpose of energy conservation and environmental protection,
when coal blending is burned, when the blending ratio of Xinjiang coal and local coal is greater than 1∶1, it can effectively
prevent coking. So the transformation has good promotion and application value.
Key words: combustion system optimization; energy conservation; milling system; NO_x