针对污染物的最新排放标准，结合PROⅡ模拟软件对环氧乙烷尾气吸收工艺过程进行了稳态模拟。通过单因素分析研究了尾气冷却温度、吸收剂进料温度及用量、吸收塔理论板数对吸收效果的影响，确定了优化后的工艺参数。在相同条件下，相比凝水吸收，乙二醇水溶液能明显降低吸收剂的用量，具有吸收剂利用率高、吸收后废液安全无毒、易处理等优势。

The steady-state simulation to the tail gas absorption process of ethylene oxide production unit is performed by using PROⅡ simulation software,based on the latest emission standards for pollutants.The impact of the cooling temperature of feed gas,the temperature and flow of absorbing agent,and the number of theoretical tray of absorption tower on the absorption efficiency are studied through single factor analysis method.Optimized process parameters are obtained.Besides,it is shown from the results that under the same conditions,using ethylene glycol solution can drastically reduce the consumption of absorbent comparing with that using condensate water,which has the advantages as follows:the utilizing rate of absorbent is higher,and the waste liquid generated after absorbing is non-toxic,safe and easy to treat.