基于乙烯气相法，运用Aspen流程模拟软件及分隔壁塔侧线气相采出技术改进了某厂制醋酸乙烯的精制工段。分别考察了分隔壁塔的进料位置、采出位置和流量、液相分配比和回流比等工艺参数对分离效果和能耗的影响，通过优化和灵敏度分析，确定了最佳的工艺操作参数。结果显示，与常规双塔精馏技术相比，分隔壁塔的冷凝负荷节约了27.69%，再沸器负荷节约了17.34%。表明分隔壁塔技术在醋酸乙烯工业化生产中有广阔的应用前景。

Based on ethylene-gas phase process for production of vinyl acetate (VAC),Aspen process simulation software and the dividing wall column (DWC) sideline gas phase extraction technology are used to renovate the refining section in a plant.The influences of the feeding position,the extracting position,the extraction flow,the partition ratio of the liquid phases and the reflux ratio of DWC are investigated.Through optimization and sensitivity analysis,the optimal operating parameters are determined.The results indicate that compared with the conventional twin-column distillation technique,the cooling duty and reboiler duty of DWC are saved by 27.69% and 17.34%,respectively,representing that DWC technique is promising in the industrial production of vinyl acetate.

刘佳男(1996-),男,本科生