【摘要】 随着我国对氮氧化物(NO_x)排放标准的不断收紧，电力行业迫切需要新的技术以减少NO_x排放。其中低NO_x旋流燃烧器技术作为控制NO_x排放的有效手段，受到广泛关注。针对一台600 MW对冲燃煤锅炉，设计并改进了一种新型低NO_x旋流燃烧器，研究了单只燃烧器流场、温度场及气体组分的分布特征，同时进一步分析了燃烧器耦合炉膛后的炉内温度场、NO分布情况。模拟结果表明：新型低NO_x旋流燃烧器中二次风为直流时煤粉燃烧较充分，且空气分级作用增强，可形成还原性气氛，NO排放量可进一步降低约21%。研究结果可为实际电站的低NO_x燃烧器改造提供理论依据和工程应用参考。更多还原

【Abstract】 With the continuous tightening of NO_x emission standards, the technical demand for reducing NO_x emissions is growing in the field of power generation. The low NO_x swirl burner is considered as one of the most promising NO_x emission control technologies. In order to reduce NO_x emissions, this paper developed a swirl burner of 600 MW opposed coal-fired boiler. The reasearch analyzed the flow field, temperature, and gas component distribution of a single burner. Additionally, the furnace temperature field and NO distribution were further analyzed after coupling the burner with the furnace. The simulation results show that in the new low NO_x burner, when middle secondary air is concurrent, the coal combustion is more sufficinent, the air staging effect is enhanced, leading to the formation of a reducing atmosphere. The NO emission can be further reduced by approximately 21%. This research can provide theoretical basis and engineering reference for the retrofitting of low NO_x burners in pratical power plants.更多还原