克劳斯反应炉内流动及燃烧反应过程数值模拟研究
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摘要
采用CFD(Computational Fluid Dynamics)方法建立了复杂结构克劳斯反应炉(包括燃烧器)的三维模型,结合酸性气燃烧反应的计算模型,较为真实地再现了克劳斯反应炉内流动及燃烧过程。数值模拟结果表明,模拟计算值与工艺包数据吻合良好,说明了计算结果是可靠的。反应炉内燃烧反应主要发生在燃烧器出口反应炉前端位置,酸性气和燃烧空气的混合越剧烈,燃烧反应高温区域越小。CFD计算结果展示了炉膛内烟气速度、温度分布,反应物及反应产物组分浓度分布,可直接作为反应炉设计合理性的理论依据。
Three-dimensional model of Claus reaction furnace with complicated structures, including the burner, was established using CFD( Computational Fluid Dynamics)method,and the flow and combustion process in the Claus reaction furnace was truly reproduced combined with the calculation model of acid gas combustion reaction. The simulation results were in good agreement with the data of Process Design Package, indicating the reliability of the calculation results. The combustion reaction mainly took place at the front end of the reactor furnace at the exit of the burner.The more intense the mixing of acid gas and combustion air was,the smaller the high temperature zone of combustion reaction was. The CFD results showed the velocity distribution and temperature distribution of flue gas in furnace and the concentration distribution of reactants and reaction products,which can be used directly as the theoretical basis for furnace design.
Three-dimensional model of Claus reaction furnace with complicated structures, including the burner, was established using CFD( Computational Fluid Dynamics)method,and the flow and combustion process in the Claus reaction furnace was truly reproduced combined with the calculation model of acid gas combustion reaction. The simulation results were in good agreement with the data of Process Design Package, indicating the reliability of the calculation results. The combustion reaction mainly took place at the front end of the reactor furnace at the exit of the burner.The more intense the mixing of acid gas and combustion air was,the smaller the high temperature zone of combustion reaction was. The CFD results showed the velocity distribution and temperature distribution of flue gas in furnace and the concentration distribution of reactants and reaction products,which can be used directly as the theoretical basis for furnace design.
引文
[1] 范维澄,万跃鹏.流动与燃烧的模型与计算[M].合肥:中国科学技术大学出版社,1991:134-140.
[2] 周桂娟,毛羽,王娟.延迟焦化炉内流动、燃烧和传热过程数值模拟[J].石油学报(石油加工),2007,23(1):77-81.
[3] J S Truelove.Discreate ordinate solutions of the radiative heat transport equation[J].Journal of Heat Transfer,1987,109(4):1048-1051.
[2] 周桂娟,毛羽,王娟.延迟焦化炉内流动、燃烧和传热过程数值模拟[J].石油学报(石油加工),2007,23(1):77-81.
[3] J S Truelove.Discreate ordinate solutions of the radiative heat transport equation[J].Journal of Heat Transfer,1987,109(4):1048-1051.