通过对乙烯装置传统停车方法和"氮气"开车方法的研究，某石化公司乙烯装置提出了氮气停车方法，并在2018年大检修停车过程中成功应用，大大缩短了装置停车时间，降低物料排放损失，获得了良好的环境效益和可观的经济效益。

Through study on the traditional stopping method and "nitrogen" start-up method for ethylene plant,a ‘nitrogen stopping’ method is put forward for ethylene plant of a petrochemical company,and successfully applied in the process of overhaul and shutdown in 2018,which shortens greatly the stopping time of the plant,reduces the loss of material discharge,and achieves good environmental benefits and considerable economic benefits.