通过分析现有的MTO装置烯烃分离流程，给出了基于LNG冷能利用的MTO装置烯烃分离流程，并进行了模拟计算和换热网络分析。结果表明，利用69.95 t/h的LNG可替代原工艺约12 703.3 kW的冷量负荷，节省约5 950 kW的冷剂压缩制冷系统功耗，大幅度降低MTO装置烯烃分离装置的能耗成本。

Based on the analysis of olefins separation process in existing MTO facility,a new olefins separation process is presented by means of utilizing the cold energy of liquefied natural gas (LNG),and the simulation calculation and the analysis of heat exchanger network are performed.The results show that 69.95 t/h of LNG can provide 12,703.3 kW of cold energy for the olefins separation process,saving 5,950 kW of power consumption in compression refrigeration system,which can greatly cut the cost of olefins separation process in MTO plant.

刘占卫(1981-),男,硕士,工程师,从事化工设计工作,010-64784788,liuzhanwei@wison.com。