Process Simulation Of High Density Polyethylene Reaction Unit Based On Aspen Plus

High density polyethylene is a kind of polymer organic compound generated by the polymerization of ethylene monomer.Because of its excellent physical properties and stable chemical properties,it is widely used in all walks of life.It is also an important industrial chemical products and industrial raw materials.Due to the complexity of the polymerization reaction,many manufacturers at home and abroad are unable to carry out real-time monitoring of the production process,and cannot simply and quickly realize the operation optimization and off-line production guidance,which is also the "bottleneck" of industrial production.The process simulation technology is an excellent solution to this problem,which is of great help to the enterprise's energy saving and emission reduction,production and quality preservation,and economic benefit improvement.In this thesis,the process simulation of high density polyethylene reactor was studied.Firstly,the algorithm principle of the process simulation software is analyzed and studied.Through the in-depth discussion of the convergence algorithm and the physical property method,the most suitable convergence method and the physical property method are compared and selected.Then,the steady state model of the high density polyethylene reaction device was established on the Aspen Plus process simulation platform based on the industrial background of the high density polyethylene device of a factory and the operating rules and polymerization reaction data of the high density polyethylene device of a factory.After data input,model establishment,convergence adjustment and result comparison,the steady-state simulation part of the simulation is completed,and the steady-state model which is close to the actual device is obtained.After analyzing and comparing the data,it is found that the simulation results are very close to the actual measurement results except for a few deviations.The whole high density polyethylene reactor runs stably,and the steady-state simulation is very successful.The success of steady-state simulation lays a solid foundation for dynamic simulation.After the dynamic parameter input and setting of the device,the steady-state flow was transferred to Aspen Dynamics for dynamic simulation.Then,the corresponding controllers are added to ?reactor,? reactor and the last reactor,after the convergence debugging and initialization of the device to run the dynamic process.The dynamic model runs stably,the control effect of the controller is good,and the dynamic model is completed successfully.After completing the simulation part of the work,the development of process simulation technology is studied.Firstly,the data interaction between Aspen Plus and Excel is made to establish a platform for industrial data visualization.Then the economy and energy consumption of this simulation are evaluated,and the significance and value of process simulation technology for industrial energy saving and increase production are discussed.Finally,the research work is described,the deficiencies and defects in the experimental process are summarized,and the dynamic simulation and future developments in process simulation are prospected,and some suggestions on the combination and interaction between simulation platform and other platforms are proposed.