模拟移动床Parex过程动态模型
Study of Dynamic Modeling for Parex Process with Simulated Moving bed
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摘要: 从模拟移动床分离C8芳烃过程的机理出发,建立某石化厂的Parex过程的动态模型。在此基础上,通过应用具有时频局部性的Haar小波的一次逼近,将分布参数模型化为对时间的微分方程。通过数值求解的方法,获得当进料浓度发生阶跃变化时该模型的暂态响应Abstract: The dynamic model of Parex process for a petrochemical plant has been established based on the mechanism of the simulated moving bed adsorption process for C 8 aromatic hydrocarbon.Then,the distributed parameter model has been reduced to ordinary differential equations by approximate technique of Haar wavelets which have local characteristic for time and frequency.By numerical simulation,when the concentration of feed flow varied,the step responses of the model have been obtained.