全氧燃烧玻璃熔窑燃料消耗量理论计算的集总参数模型

A Simple Lumped Parameter Model for Calculating the Fuel Consumption of Oxy-fuel Glass Melting Furnace

在动态分析燃料输入量变化对窑炉燃烧空间传热影响的基础上,根据玻璃熔制的基本热要求,采用集总参数分析法,建立了全氧燃烧玻璃熔窑燃料消耗量理论计算的一种简化模型,并在计算机上进行了数值求解。随窑墙热阻增大,窑墙外表面温度和通过窑墙的散热损失明显降低,而窑墙内表面温度升高,火焰与窑墙传给玻璃料液面的热量显著增大。在保证玻璃熔制基本热要求的前提下,火焰温度可适当降低,因而燃料消耗量减小。胸墙越高,通过窑墙的散热损失越大,火焰与窑墙传给玻璃料液面的热量也相应增大,综合结果是燃料消耗量略微增大。

A simple lumped parameter model, which takes into account of the dynamic effect of fuel input change on the heat transfer in combustion chamber was developed to calculate the fuel consumption of oxy-fuel glass melting furnace by satisfying the basic thermal requirements for glass melting. A special program was written to numerically solve the model. With increase the furnace wall thermal resistance the outside surface temperature of superstructure wall and the heat losses through the superstructure decrease obviously while the inner surface temperature of superstructure wall and heat transferred from the flame and superstructure to the glass melt increases markedly. Un der the condition that the basic thermal requirements for glass melting were satisfied, a lower flame temperature can be used and therefore, fuel consumption decreases. A higher breast wall will result in larger amount of heat losses and meanwhile the beat transferred from the flame and superstructure to the glass melt correspondingly increases. Thus, slightly higher fuel consumption is needed.