选择性催化还原脱硝反应器数学模型及仿真

针对国内选择性催化还原(SCR)脱硝技术尚未成熟,对SCR反应器中主要的化学反应建立了集总参数动态数学模型,其中分别建立了催化剂表面NH,的吸附-解吸附质量平衡模型、反应器中各气体成分的质量平衡模型以及总体能量平衡模型.利用MATLAB仿真语言工具开发了SCR反应器的动态仿真模型,进行了模型的稳态计算.并在仿真模型的基础上进行了NO;浓度、温度扰动下的仿真试验,试验结果趋势正确,分析结果表明建立的数学模型具有较强的实用性.

Mathematical Model of Selective Catalytic Reaction of Nox in Reactor and Its Simulation

As the domestic technology of selective catalytic reduction(SCR) has not been mature.A assembled-parameter dynamic mathematical model is established for the primary chemistry reaction process in SCR reactor.The mass balance equation of the NH3 adsorption-desorption on the catalyzer surface and six gas components,and total energy balance equation in SCR reactor are set up respectively.A dynamic simulation model has developed by using MATLAB simulation tool.The steady calculation for model is carried on.Based on the established dynamic simulation model,two dynamic simulation experiments have been done,which include the simulation experiment of step disturbance about NOx concentration and temperature.The simulation results current is correctl.The analyzed results indicate that the established dynamic mathematical model for SCR reactor is credible,and prove that the simulation model is practical.