气相甲醇合成二甲醚生产过程优化研究(Ⅰ)——二甲醚分离塔的计算机优化

Process Optimization of Dimethyl Ether Synthesized by Gaseous Methanol (Ⅰ)——Optimization of DME Separating Column by Computer

采用Aspen Plus模拟软件对二甲醚(DME)生产流程进行了模拟,并对DME分离塔的操作条件进行了优化。当塔顶压力为8.3 bar,塔底压力为8.5 bar时,计算得到最佳理论板数为20,最佳回流比为0.521,最佳进料塔板为8。在最佳条件下操作,DME回收率为99.8％,DME纯度为99.95％以上,达到了优化目标。

The process of Dimethylether（DME）was simulated with Aspen Plus. The optimal regulating conditions of DME separator were obtained as theoretical plate numbers of 20, refluence ratio of 0. 521 and feeding plate of 8 when the top pressure and bottom pressure of the column were designed at 8.3bar and 8.5bar respectively. The recovery ratio and the purity of DME under optimal conditions are 99.8% and 99.95% respectively, which reaches the object of optimization.