Simulation And Optimization Of Crude Distillation Process

The design and operation of distillation equipment of crude oil is critical topetrochemical companies.In the recent years,technology process,saving energy andautocontrol in distillation of crude oil attain huge development by technologydevelopment.Chemical process simulation play an importment role in this process.Chemical process simulation is based on mechanism of unit operation and it adoptmathematical method to simulate chemical technology process.In this paper ,35million/a atmospheric and vacuum distillation equipment of Jinzhou petrochemicalcompany is simulated using simulation software Aspen Plus.The operation data ofevery tower in crude oil distillation process is attained, including material balancedata of overall equipment,consume ratio,temperature distribution,pressure distributionand vapor-liquid equilibrium results. BP datas of simulation product is also comparedwith demarcated data. It shows that the error between simulation data and actual datain overall material balance and operation of every tower is below 5%.The discrepancybetween simulation PB data before 50% flow sheet and actual data is small while thatafter 50% is large. And the discrepancy increases along the simulation process.Butsimulation results accord with actual data in general. The sensitiveness of simulationis also studies in this paper.It shows that overall evulsion ration increases when theoverhead of early-distillation tower and atmospheric distillation increase. Increase ofvapor of atmospheric tower and sidetrack vapor extraction an also leads to rise ofoverall evulsion ration .The simulation results in this paper will play an important rolefor establishing operation optimizing scheme of 35 million t/a crude oil distillationequipment in Jinzhou petrochemical company.