Design And Steady-state Analysis Of The Internal Thermally Coupled Reaction Distillation Column

As the most important separation technique in chemical process,distillation process is studied to improve the efficiency of the process of distillation and reduce energy consumption since it was invention because of its high energy consumption and low thermodynamics efficiency. The internal thermally coupled distillation column (ITCDC) is a new distillation technique and is researched abroad as its huge energy-saving potential. Little research has been done on this field at home and abroad, so it is new research field.Reaction distillation(RD) technology is a process intensification technology which has been skilled application in industrial production. It has many advantages such as low energy consumption and low operating cost and the increased yield of reversible reaction. In this chapter, we combine the RD and ITCDC to form a new distillation configuration, called the internal thermally coupled reaction distillation column (ITCRDC). The ITCRDC integrates the merits of the RD and ITCDC and has tremendous energy saving potential。In this thesis, taking the hydrolysis of methyl acetate (MeAc) as an example,an computation models of the ideal ITCRDC is established using Aspen plus software. Through the results of simulation we can know the ideal ITCRDC is feasible and proofed the huge energy saving potential of the ideal ITCRDC. Also a preliminary analysis is done for the ideal ITCRDC and the characteristics of the ideal ITCRDC are exposited.Then the heat transfer in ITCRDC is studied, including the different heat transfer plate and different heat transfer capacity. The influence of the heat transfer on the ITCRDC is detailed investigated. Through the simulation results we summary the discipline of the heat transfer affected the ITCRDC. In addition the column configurations which are possible to be are disgusted. In the same minimum heat transfer temperature difference and product requirements, we find the column configuration which has the least exergy consumption and the column configuration which has the least reboiler exergy consumption.Finally in this paper, The effects of changing ratio of water feed to MeAc feed, reboiler heat duty, the flow rate of top products, feed stages of water, the reaction zone height and location on ITCRDC are analyzed, and then the primitive optimized value of every parameter has been determined.