通过数值模拟对2955t/h超超临界塔式炉炉膛内燃烧过程进行研究,给出了炉内流场、温度场的分布规律以及NO_2排放的影响规律。结果表明,采用同心切圆燃烧方式、CCOFA风和SOFA风对燃烧区域过量空气系数的多级控制,实现了炉膛出口烟温偏差小、NO_x的排放量低的要求,数值模拟与试验数据相比,两者基本吻合。 Through the numerical simulation, the combustion process in the 2955t / h supercritical hearth furnace was studied. The distribution law of the flow field and temperature field in the furnace and the influence law of NO2 emission were given. The results show that the multi-stage control of the excess air coefficient in the combustion area by the concentric tangent combustion method, the CCOFA wind and the SOFA wind have realized the small deviation of the flue gas temperature and the low NO_x emission at the furnace exit. The numerical simulation is compared with the experimental data , The two basically match.