Modeling And Application Of Multi-plan Solvent Production Unit

The multi-plan solvent production unit was studied in the thesis. Comparing with other normal petro-chemical processes, there were many specialities in the multi-plan solvent production process, such as production mode swithing frequently, products renewal quickly, operation load changing greatly, and so on. Therefore, in this thesis, based upon Aspen HYSYS V7.1 software and its secondary development the model of the multi-plan solvent production, including the model of the distillation unit and the reaction unit, was set up.During the distillation unit modeling, the normal model for the distillation unit was set up by the general module of Aspen HYSYS V7.1. The method for the material properities calculation was suitable for the solvent material according to literatures. And then the equation of state(EOS) Peng-Robinson, Chao-Seader, Grayson Streed were used and compared. The simulation results showed that the Peng-Robinson EOS was the most suitable for the model. Finally, the model was set up by Aspen HSYSY V7.1 based on the Peng-Robinson EOS.During the reaction uint modeling, the CSTR model and the FPR model for the reactor were set up and used in the Aspen HYSYS v7.1 model. By the contrast, the FPR model was more similar to the racator operaton data than the CSTR model in practice. Finally, the model was set up by Aspen HSYSY V7.1 based on the FPR model.In the end, the model was applied to the solvent production unit for analysing the dynamic swithing procedure, forecasting the product specification, studying the distillation and the reaction uint operation, etc. The results included that the model was feasible, resonable and suitable for the need of the multi-plant solvent production.