空气单蓄热式烧嘴燃烧过程的数值模拟及其参数优化

Numerical simulation and parameters optimization of combustion process of air-single regenerative burner

文章建立了空气单蓄热式烧嘴的物理数学模型,采用FLUENT软件对蓄热式烧嘴的燃烧过程进行了三维数值模拟。研究表明,煤气和空气约在炉宽方向6-7m处燃烧完全,炉宽方向3-7m的区域为高温段,温度最高峰值约在5m处;炉内平均温度随煤气负荷和二次空气预热温度的增加而增加,随一次风比例的增加而降低;煤气负荷和二次空气预热温度对炉内温度场分布的影响最为显著,空气系数次之,而一次空气量的影响较小。

A mathematical model was developed for the air-single regenerative burner and the three-dimensional numerical simulation was implemented with FLUENT software. The result shows that gas combustion is completed at the middle of the furnace width with a distance of 6 - 7m part from the burner. The high temperature region is located at the place with the distance of 3 -7m, and the maximum temperature is located at the place with the distance of 5m. The average temperature increases with the gas feed charge and the second air preheating temperature increasing, it decreases with the first air flux ratio increasing. The temperature field distribution is greatly influenced by the gas feed charge and the second air preheating temperature. The air factor takes the second place, and the first air flux has small effect on the temperature field distribution.