Process Simulation Of Atmospheric And Vacuum Distillation Unit Based On Aspen Plus And Aspen Dynamics

In this thesis,based on the atmospheric and vacuum distillation unit in a plant,the oil property data and process condition parameters in the process specification of atmospheric and vacuum unit in a plant are used as the basis,and the simulation model of atmospheric and vacuum tower unit is established on Aspen Plus process simulation software platform.After debugging,the simulation results are obtained after convergence,and a more accurate steadystate simulation model is obtained.The simulation results show that most of the data of the primary distillation tower,atmospheric pressure tower and pressure reducing tower have little deviation from the measured data of a certain plant,the whole unit runs stably and the steady-state simulation is relatively successful,which also lays a foundation for the later dynamic simulation.After the completion of the steady-state simulation,the specification parameters of the device are input according to the operation procedures,and the tower height and diameter data are input,the whole device is transferred to Aspen Dynamics for dynamic simulation.In the dynamic simulation,the controller is added according to the actual situation of the device.After the controller is set,the whole control program is initialized and run.By observing the operation data of each model,it is found that the operation of the whole device is relatively stable and the dynamic simulation is successful.On the basis of stable operation of each part of the whole unit,according to the measured data of atmospheric and vacuum unit in a certain plant,the crude oil feeding amount of the whole unit changes according to time,and the operation of each unit is observed,as well as the change of simulation data.The simulation results show that when the crude oil feed quantity changes,the data results of the primary distillation tower,atmospheric pressure tower and pressure reducing tower of the whole unit have changed in varying degrees,which also makes the whole dynamic simulation data closer to the actual value and the whole dynamic simulation situation closer to the real operation of the plant.The steady-state simulation and dynamic simulation of this process have been successful,and the simulated data are real and effective,which is of great significance for the recurrence of the operation process of atmospheric and vacuum distillation unit in a plant.This study also analyzes the energy consumption and economic benefits of the whole device,and provides the possibility for the optimization of the economic energy consumption of the device in the future;this study also explores the connection between Aspen Plus and excel,making the interconnection between Aspen Plus and other software possible.