为研究1139t/h四角切圆燃烧锅炉炉内气固两相流动问题,采用标准k-ε模型和DPM模型数值研究3种典型负荷下炉内流动特性及固体颗粒运动轨迹.研究结果表明:在不同负荷下四角射流均能形成稳定切圆,但炉内气流偏斜严重易引起水冷壁的结渣;100%负荷下在炉膛壁面产生漩涡,颗粒对水冷壁造成冲刷;炉内合适的煤粉粒径能够保证煤粉在炉内的停留时间.研究结果对锅炉的热态燃烧调整提供理论依据. In order to study the gas-solid two-phase flow problem in the 1139 t / h tangentially fired boiler, the flow characteristics and the trajectories of solid particles under three typical loads were studied by using the standard k-ε model and the DPM model. The results show that The four corners of the jet under different loads can form a stable tangent, but the serious airflow deflection in the furnace can easily lead to the slagging of the water wall. Whirlpool occurs on the wall of the furnace under 100% load, and the particles cause erosion on the water wall. The particle size can ensure the residence time of pulverized coal in the furnace.The research results provide a theoretical basis for the adjustment of the hot combustion of the boiler.