运用Aspen Plus模拟软件，采用UNIFAC-Dortmund集团贡献模型估算了UNIQUAC方程中的二元交互作用参数，建立了NFM萃取精馏分离芳烃的过程模拟。模拟结果表明，该模型可以很好地反映装置的实际操作状况。分别考察了溶剂比、溶剂进料温度、溶剂进料位置、回流比等操作参数对萃取精馏塔的分离效果和能耗的影响，以及在保证侧采甲苯纯度的情况下进料位置、侧采位置、气相分配比、液相分配比对隔板塔的能耗影响，获得了NFM芳烃精制新流程中萃取精馏塔和隔板塔的较优操作参数。

Aspen Plus software and UNIFAC-Dortmund group contribution model are used to estimate the binary interaction parameters in UNIQUAC equation.The process simulation for separation of aromatics by N-formylmorpholine (NFM) extractive distillation is established.The simulation results show that this model can reflect well the actual operation situation of the unit.The effects of solvent ratio,inlet temperature of solvent,feed stage for solvent,reflux ratio and other operating parameters on the separation efficiency and energy consumption of the extractive distillation column are investigated respectively.The influences of feed stage,side stream stage,gas split ratio and liquid split ratio on the energy consumption of the dividing wall column are studied in the premise of ensuring the purity of toluene from stream.The optimal operating parameters for both the extractive distillation tower and the dividing wall column in the novel NFM aromatic refining process are obtained.