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系统改造后的运行状况的析，对脱甲改造后的运行状态行了总结，并为更一步的优化工艺条件提出措施。