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为配合液态排渣多级煤燃烧器（ＴＲＷ燃烧器）的应用示范工程，以质量、动量、能量守恒定理为基础，建立了ＴＲＷ燃烧器后置炉膛内三维流动的数学模型，采用经典的ＳＩＭＰＬＥ算法和混合差分格式，对炉膛内的流场及煤粉运动轨迹进行了数值模拟．从而为锅炉设计、三次风和顶部燃尽风（ＯＦＡ）的布置提供了大量的参考数据．根据ＴＲＷ燃烧器的出口尺寸以及某锅炉厂提供的炉膛尺寸和三次风、ＯＦＡ的布置原则，对４个布置方案进行了９种不同工况的计算．得到与ＴＲＷ燃烧器能较好匹配的炉膛结构及三次风、ＯＦＡ的布置方案，并对计算结果进行了详细地分析，确认计算结果符合炉内流动规律．计算程序中一些参数如网格、锅炉尺寸以及燃烧器的布置可以方便地进行修改，因而很容易计算其他炉内的流动过程和移植应用．
To meet the application of liquid slag multi-stage coal burner (TRW burner) demonstration project, based on the mass, momentum and energy conservation theorem, the mathematical model of three-dimensional flow in the rear hearth of TRW combustor is established. The classical SIMPLE Algorithm and hybrid difference scheme, the numerical simulation of the flow field in the furnace and the trajectory of pulverized coal is carried out. This provides a great deal of reference data for boiler design, OFB and OFA arrangements. According to the outlet size of TRW burner and the furnace size and tertiary air provided by a boiler plant, OFA layout principle, 9 different working conditions were calculated for 4 layouts. The structure of the hearth, the configuration of tertiary air and OFA, which are well matched with the TRW burner, are obtained. The calculation results are analyzed in detail, and the calculation results are in accordance with the laws of flow in the furnace. Some of the parameters in the calculation program such as grid, boiler size and burner placement can be easily modified, making it easy to calculate flow and transplant applications in other furnaces.