基于分壁塔的己烷油分离工艺模拟研究OA

Aspen Plus V12 process simulation software was employed to carry out the steady-state simulations of three hexane oil separation processes,namely,the conventional direct distillation separation,the optimized distillation separation,and the dividing wall column(DWC)distillation separation.Parameters of the DWC were also optimized.According to the simulation results,superior in energy conservation,the DWC distillation separation reduces condenser load and reboiler load by 16.26%and 15.70%,respectively,compared to the conventional direct distillation separation,and by 14.04%and 13.61%,respectively,compared to the optimized distillation separation.Furthermore,compared to a traditional twin-column separation,the DWC lowers condenser load by 27.25%and reboiler load by 24.46%.The optimal process condition of DWC is achieved when the feed location is at the 20th stage of the prefractionator section,the optimal reflux ratio is 50,the diaphragm has its upper end at the 28th stage,the liquid-phase distribution ratio is 0.3,and the side draw stage is the 30th.