随着经济的发展 ,对锅炉炉膛传热计算实用性、精度的要求也不断提高 .为此 ,提出了大型煤粉锅炉炉膛分体式计算方法 ,即把炉膛以大屏过热器低端为界分成上、下两个部分进行传热计算 :下炉膛采用零维模型 ,上炉膛采用二阶假想面法的三维数值模拟 .计算结果对比分析显示 ,此方法可以比较准确地得出屏区温度和热流密度分布 ,值得进一步研究验证 . With the development of economy, the requirements for the practicality and accuracy of heat transfer calculation of boiler hearth are also increasing constantly.Therefore, a method of split calculation for large hearth boiler hearth is proposed, which divides the hearth into the lower boundary of large screen superheater The upper and lower parts of heat transfer calculation: the lower furnace using zero-dimensional model, the upper furnace using second-order imaginary plane method of three-dimensional numerical simulation results show that this method can be more accurately draw the screen temperature and heat flow Density distribution, it is worth further study to verify.