关键词: 乙醇-水, 精馏, 吸附, 节能优化

Abstract: In this paper,binary interaction parameters were firstly fitted by using Aspen Plus to make its calculation results practical. Secondly based on the analysis of ethanol-water distillation column (C31103) and adsorption system,the energy consumption for both parts was calculated and the relationship between energy consumption and mass fraction of ethanol of C31103 distillation (x_D) was established as well. The amount of dilute alcohol was calculated in association with x_D. A series of energy consumption were calculated when x_D was between 0.945—0.88 with the increment 0.005. It was concluded that the appropriate x_D was within 0.9 and 0.92. The amount of distillate alcohol and the distillation of C31103 under different x_D was calculated by simulation. After analyzing and comparing the results by calculation and simulation,it was obtained that the relative errors were less than 4%,which confirmed the accuracy of the model of energy consumption.

Key words: ethanol-water, distillation, adsorption, energy-saving optimization