以煤为原料的甲醇制烯烃（MTO）技术可以有效降低我国对石油资源的依赖，但MTO工业装置普遍存在分离能耗较高的问题。采用Aspen Plus对某厂180万t/a甲醇制烯烃装置分离部分的工艺流程进行稳态模拟，模拟结果与实际值吻合良好。运用灵敏度分析工具对工艺参数进行优化，优化后1年可增产乙烯554 t、丙烯487 t，并节约3.5×10⁶ kW的热负荷。将脱丙烷塔塔釜去乙烯回收塔的热物流用于丙烯塔进料预热，可进一步提高经济效益。

Coal-based methanol to olefins (MTO) technology effectively reduces China's dependence on petroleum resources, but the separation section in MTO plant usually consumes high energy consumption.The separation section of a 1.8 million tons/year MTO plant is simulated in steady state by means of Aspen Plus software, and the simulation result shows a good coincidence with the actual industrial data.The sensitivity analysis tool is utilized to optimize the process parameters.After optimization, additional 554 tons of ethylene and 487 tons of propylene can be produced, and 3.5×10⁶ kW of heat load can be saved.The economic benefits will be further improved by using the heat flow from the bottom of de-propane tower to preheat the propylene tower feed.

李雪(1998-),女,硕士生