针对甲醇制烯烃MTO装置浓缩水处理过程中存在的回炼结焦和外排影响污水装置生化系统的难题,通过对MTO装置浓缩水组分分析、处理技术的机理分析和小试试验,并结合MTO装置运行和布局特点,研究出一套环保达标性高、经济性能好、能耗利用率高的浓缩水工业处理技术。经工业化应用表明,深度处理后的浓缩水COD由359 000 mg/L降至3 000 mg/L以下,既满足了生产安稳长满优运行的生产管理原则,又保障了"节能减排"、"能耗双控"、"环保零排放"的能源管理要求。

During the concentrated water treatment process in the methanol to olefins (MTO) unit,there exist problems such as refining coking,and efflux affecting the biochemical system of the sewage plant.Through analyzing the components of concentrated water,analyzing the mechanism of treatment technology and the small-scale test,as well as combining with the operation and layout characteristics of the MTO unit,a set of concentrated water industrial treatment technology with high environmental protection compliance,good economic performance,and high energy consumption utilization rate is developed.It is shown through industrial application that the content of COD in the concentrated water after advanced treatment is reduced from 359 000 mg·L^-1 to below 3 000 mg·L^-1,which can meet the company's stable,long-term and optimal operation production management principles,and also guarantees energy management requirements like "energy saving and emission reduction","control of energy consumption and energy intensity"," zero emission".