本文对以MTBE为原料裂解制备异丁烯工艺中分离工段的甲醇精馏单元进行模拟和优化。采用工程模拟软件Aspen Plus对其甲醇精馏过程模拟优化,根据物料的性质、单元特点,选择热力学模型NRTL方程,建立稳态精馏模拟,寻找最佳进料位置以及最小操作条件,实现甲醇质量纯度达到99%,回收率达到95%,废水中甲醇含量低于0.5%的分离目标。 In this paper, MTBE as the raw material for pyrolysis of isobutylene separation process methanol distillation unit simulation and optimization. The methanol distillation process was simulated and optimized by the engineering simulation software Aspen Plus. According to the properties of the material and the characteristics of the unit, the NRTL equation of the thermodynamic model was selected. The steady-state distillation simulation was established to find the optimal feeding position and the minimum operating conditions, Purity reached 99%, the recovery rate of 95%, the methanol content of wastewater less than 0.5% of the separation goals.