Mpce Device Continuous Reaction Process Modeling And Experimental Validation

Continuous reaction process (Continuous stirred tank reaction, CSTR) of the MPCE-1000 multi-function experimental systems is a complex chemical reaction system, which simulates the propylene polymerization processes; the thesis focuses on the modeling of the CSTR plant. Based on the careful study of the CSTR Reactor characteristics, the relationship between the input variables and output variables was tested, and also the impact of feed concentration; reaction temperature and catalyst's actions on the chemical reaction rate was analyzed. Through the analysis of propylene polymerization chemical reaction kinetics, chemical reaction kinetic equtation was abtained, which laided the basis for the modeling parameters.Based on the analysis of the reaction mechanism of propylene polymerization, the dynamic model of CSTR is developed on the basis of the mass and energy balance, which described the relationship between input variables and operating conditions. In order to analyze the model thoroughly, the linear equation was established by using linear treatment in the operating point of the model, which provided the conditons for the controlling the CSTR system effectively.Finally, steady-state model of CSTR has been performed. In steady-state conditions, the open-loop transfer function between the operation variables and state variables was abtained by changing the operating conditions. Combined with PID control algorithm and changing operating conditions, the model was verified dynamicly. By comparing the simulation model output and experimental device output, the range of application of the linear model was given. On the basis of this, the following conlusion was drawed that the model can be effective for CSTR experiment system.