乙醇-水体系分离提纯过程新技术的研究

首先拟合了Aspen Plus中乙醇-水的二元交互参数,使其计算结果更符合实际。其次通过分析乙醇-水精馏二塔(C31103)与新型吸附系统工艺流程,计算了C31103与吸附系统的主要能耗,得到了二者关于C31103塔顶采出中乙醇质量分数x_D的关系式。并计算得到淡酒量和塔顶采出量关于x_D的关系式。运用Aspen Plus软件对C31103进行稳态优化,计算出x_D在0.945～0.88之间时的能耗与x_D的关系,确定最适宜x_D为0.9～0.92,并通过模拟得到各x_D下的淡酒量和塔顶采出量等结果,比较淡酒量的计算结果和模拟结果,得到相对误差小于4%,证实了能耗模型的准确性。

Research on the new technology of ethanol-water distillation

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.