本文研究了带有屏式受热面的大型煤粉锅炉炉膛传热过程的数学模拟方法，尽管这时炉膛的几何形状、边界情况比较复杂，但利用蒙特卡洛法和有限差分法可以使问题得到较好解决。作者利用这一方法计算了淮北电站２０万千瓦锅炉炉内烟气温度和壁面热流分布，并论述了它在锅炉设计和运行方面的应用。 This paper studies the mathematic simulation of the heat transfer process in a large pulverized coal boiler with a panel heating surface. Although the geometry and boundaries of the furnace chamber are complex at this time, the problem can be solved by the Monte Carlo method and the finite difference method Better solved. Using this method, the authors calculated the distribution of flue gas temperature and wall heat flow in a 200,000-kilowatt boiler in Huaibei Power Station, and discussed its application in boiler design and operation.