单元玻璃窑炉富氧燃烧空间的数值模拟研究

本文建立了单元玻璃窑炉富氧燃烧空间三维数学模型,其中气相流动模型由质量守恒定律、动量守恒定律、能量守恒定律和标准k-ε湍流模型组成,化学反应模型使用有限速率/涡耗散模型,辐射传热模型使用离散坐标模型.以年产2万吨玻璃纤维的熔窑为对象,利用Fluent软件对富氧燃烧空间内气体的流动状况和温度分布进行数值模拟.通过模拟结果与现场实测数据进行比较可以看出,该数学模型能够比较客观地反映单元玻璃窑炉富氧燃烧空间的温度场和速度场的分布规律.在此基础上,对喷枪的布置加以调整和改进后得到了更佳的模拟效果,还说明该数学模型对窑炉富氧燃烧在生产过程的研究和应用也有一定的指导作用.

Study of Numerical Simulation of Oxygen-enriched Combustion Chamber of Cell Glass Furnace

This paper establishes a three-dimensional mathematical model of cell glass furnace in the oxygen-enriched combustion space, which consisting of gas flow model composed of mass conservation equation, momentum conservation equation, energy conservation equation as well as the standard k-ε model; chemical reaction model composed of eddy-dissipation model; and radiation model composed of discrete ordinates model. Based on the object of an annual output of 20000 t fiber glass furnace, the distribution of gas flow and temperature field, velocity field of the furnace are researched by using FLUENT software. According to the comparison between the simulation results and the measured results obtained on the spot, it can be suggested that the mathematical model can objectively reflect the real distribution of the temperature field and velocity field of the cell glass furnace. On the basis of research results, the author makes some recommendations to improve simulation results of the combustion process, that is, to adjust the layout of the spray gun on the combustion space. It also can be shown that the three-dimensional mathematical model plays an important role in the research and application of the oxygen-enriched combustion of cell glass furnace.