Simulation and optimization of NFM extractive distillation process accompanying a dividing wall column
LI Chun-li1,2, JIANG Ting1, SUN Li-jun1
1. Hebei University of Technology, Tianjin 300130, China; 2. National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Tianjin 300130, China
Abstract: 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.
李春利, 姜挺, 孙立军. 带有隔板塔的NFM萃取精馏工艺模拟和优化[J]. 现代化工, 2018, 38(7): 219-222.
LI Chun-li, JIANG Ting, SUN Li-jun. Simulation and optimization of NFM extractive distillation process accompanying a dividing wall column. Modern Chemical Industry, 2018, 38(7): 219-222.
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