This article analyze the condition of demethanizer after revamping. The operation state afterwards the revamp is summarized and further optimization of the demethanizer is given in the paper.

摘要通过乙烯装置脱甲统改造行状况分析，对脱甲改造行状态进行了总结，并为更进一步优化工艺条件提出措施。