EO/EG装置增产精制环氧乙烷改造工艺方案研究

SELECTION OF REVAMPING SCHEME FOR EO PURIFICATION SYSTEM IN EO/EG PLANT

依托国内某8/28万t/a环氧乙烷/乙二醇(EO/EG)装置扩能改造项目,利用ProⅡ软件建立EO精制部分流程模拟,结合流程模拟与EO/EG装置现场测试,研究了EO精制塔系回流比、进料浓度、塔内件、能量利用方案等因素对EO产品产量和质量的影响,最终确定了合理的改造方案。在保持EO反应器产能不变的前提下,此方案通过现有装置脱瓶颈改造将EO产能提高到原设计约180%,并实现改造用时最短、耗能最低、经济效益最大的目标,对同类装置EO扩能改造项目具有一定的参考意义。

Based on a 80/280 kt/a EO/EG plant in China,this research conducted a process modeling for the EO purification unit via Pro II in order to develop a revamping scheme.Combining the data obtained from the simulation with its counterpart collected from the actual operation,this article studied the influence of reflux ratio,EO concentration in feed,tower internal,energy utilization scheme and other factors on the output and quality of EO product,and determined a reasonable revamping scheme.Without increasing EOE(EO Equivalents)capacity,the optimized revamping scheme can increase the EO design capacity up to 180%of the original design within a short design and construction time,with the lowest energy consumption and the highest profit.What presented herein can provide valuable reference for the EO capacity expansion of EO/EG plants.