The influences of the oxygen-enriched combustion technology on temperature field, velocity field,reactant concentration and fuel consumption in cracking furnace were investigated through a 2D simulation to predict the oxygen-enriched combustion process using the commercial software Fluent. To describe the combustion process accurately,a CHEMKIN file including 16 species and 41 reactions was introduced into the Fluent software. The simulation also took into account the standardk-ɛ turbulence model,P-1 radiation model and turbulence-chemistry interaction. The results showed that,with increasing the oxygen concentration,the fuel burned more completely and the reaction heat increased. When the oxygen concentration(w) increased from 23.5% to 36.5%, in the furnace,the average temperature increased by 7.93% and the peak temperature increased by 4.33%;and at the effluent gas outlet of the furnace,the temperature increased by 3.56%,the CO concentration reduced by 54.5%,the CO2 concentration increased by 9.23% and the NOx concentration increased to 0.350 5%.%利用计算流体力学软件Fluent对裂解炉燃烧器二维模型富氧燃烧过程进行数值模拟，研究了富氧燃烧技术对裂解炉炉膛内燃烧过程的影响。采用详细燃烧模型，即41步甲烷燃烧骨干机理和涡耗散概念模型进行耦合计算，详细准确描述了富氧燃烧过程。湍流模型采用标准k-ɛ湍流模型，辐射模型采用P-1模型。模拟计算结果表明，随助燃空气中氧气含量的增大，燃料燃烧更加完全，燃烧反应放热量增大。当氧气含量（w）从23.5%增至36.5%时，炉膛内平均温度升高了7.93%、峰值温度升高了4.33%、烟气出口处温度升高了3.56%、烟气出口处CO含量降低了54.5%、烟气出口处CO2含量升高了9.23%、烟气出口处NOx含量增幅较大（达到了0.3505%）。
展开▼
