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应用FLUENT软件,采用k-ε模型对CO/H2/N2的湍流高温低氧燃烧进行模拟,得到不同空气预热温度下温度场、流场、组分分布特性及变化规律。针对模拟结果,从自由基基元反应动力学理论出发,采用详细的化学反应模型,结合Kintecus化学计算软件进行煤气高温低氧燃烧的数值模拟,得出火焰温度、各种自由基浓度、NOx浓度等变化规律。结合两方面分析结果找出变化规律,为实际燃烧中污染物的有效控制提供理论依据。
Using FLUENT software, the k-ε model was used to simulate the turbulent high-temperature low-oxygen combustion of CO / H2 / N2. The temperature field, flow field, component distribution characteristics and variation under different air preheating temperatures were obtained. Aiming at the simulation results, starting from the kinetic theory of free radical reaction, a detailed chemical reaction model was combined with Kintecus’ s chemical calculation software to simulate the high temperature and low oxygen combustion of coal gas. The flame temperature, various radical concentrations, NOx concentration Other changes. Combined with the analysis results of two aspects, we can find out the change rule and provide a theoretical basis for the effective control of pollutants in actual combustion.