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为了研究蓄热式钢包烘烤的空气和煤气的预热温度对高温空气燃烧过程的影响,耦合了烘烤过程中流体流动、换热和燃烧过程,用数值模拟方法建立了三维立体数学模型,利用计算流体力学软件Fluent,采用有限元差分法和修正速度—压力相耦合的算法Simple,计算了钢包内的燃烧现象,得出了在不同预热温度时,燃烧室内气体温度场和氧气浓度场的分布。结果表明,提高气体预热温度有利于加快燃烧进程,可提高炉内的整体温度及温度的均匀性,降低局部氧浓度,利用高的烘烤效率减少NO_x的排放。
In order to study the effect of air and gas preheating temperature of regenerative ladle on the combustion process of high temperature air, the fluid flow, heat exchange and combustion process in the baking process were coupled. The three-dimensional mathematical model was established by numerical simulation. Using the computational fluid dynamics software Fluent, the finite element difference method and the modified speed-pressure coupling algorithm Simple are used to calculate the combustion phenomenon in the ladle. The results show that the gas temperature field and the oxygen concentration field Distribution. The results show that increasing the gas preheating temperature is favorable for accelerating the combustion process, improving the overall temperature and temperature uniformity in the furnace, reducing the local oxygen concentration, and reducing the NO_x emission with high baking efficiency.