丙烯醛脱水萃取精馏工艺的模拟与优化

以二甲基亚砜（DMSO）作为萃取剂，选用UNIQUAC热力学模型对丙烯醛精馏脱水工艺进行模拟研究与优化。利用Aspen plusV9.0流程模拟软件进行模拟计算，基于全年总费用（TAC）最低原则，采用迭代优化法分别对萃取精馏塔（T-101）、溶剂回收塔（T-102）的理论板数（N_T）、进料位置（N_F）、回流比（R）等参数进行了优化，最终模拟结果为：萃取精馏塔总理论塔板数30，进料位置第25块理论板，回流比0.249，萃取剂进料位置第4块理论板，溶剂比0.183；溶剂回收塔的理论塔板数22，回流比0.232，进料位置第11块理论板；通过优化得到TAC最低为340万元/a。本文的模拟结果可以为丙烯醛脱水工艺的设计提供理论参考。

Computer simulation and optimization of an acrolein dehydration process via extractive distillation

The UNIQUAC thermodynamic model has been used to simulate the dehydration of acrolein using DMSO as the extractant. Aspen plusV9.0 simulation software was used to simulate the process. Based on the lowest "total annual cost"(TAC), the number of theoretical plates (N_T), feed positions (N_F), the reflux ratio (R) and the other parameters of the extractive distillation column (T-101) and the solvent recovery column (T-102) were optimized by an iterative process. The optimized extractive distillation column parameters were found to be:number of theoretical plate=30, feed at position 25, mass reflux ratio=0.249, extractant feed plate position of 4, E/F=0.183. The optimized solvent recovery distillation column parameters were found to be:number of theoretical plates=22, mass reflux ratio=0.232, feed at position 11. Under these conditions, the minimum TAC was calculated to be 3.40 million yuan/a. These simulation results can provide a theoretical basis for the design of an improved acrolein dehydration process.