单颗粒煤粉燃烧数学模型

Mathematical Model for Single Pulverized Coal Combustion

建立了单颗粒煤粉燃烧数学模型，并模拟了不同条件（不同煤粉直径、不同环境温度及氧浓度）下煤粉的燃烧过程。模拟给出了煤粒表面温度随燃烧时间的变化关系、燃烧率与燃烧时间及煤粒直径的关系、煤粒周围膜层中气相成分及温度的分布等。该模型为预报高炉大量喷煤后煤粉燃烧率提供了基础。

A mathematical model to represent combustion of single pulverized coal particle has been developed. The model is used for predicting the burning rate, burning time, burning temperature in different conditions for different coal particle size. Surface temperature of pulverized coal particle changing with burning time and the relation between burning rate, burning time and diameter of pulverized coal particle, and the distribution of gas composition and temperature in the thin flim around the pulverized coal particle have been obtained. The model can also be used for predicting coal burning rate for large scal pulverized coal injection in blast furnace.