乙烯装置脱甲烷系统中甲烷分离浅析  

DISCUSSION ON METHANE SEPARATION IN DEME-THANATION SYSTEM OF ETHYLENE PLANT

作　　者：李仑 Li Lun(SINOPEC Engineering Incorporation,Beijing,P.C.100101)

机构地区：[1]中国石化工程建设有限公司,北京100101

出　　处：《乙烯工业》2021年第3期33-37,I0001,共6页Ethylene Industry

摘　　要：对高压脱甲烷系统中甲烷分离进行了讨论。通过对甲烷在脱甲烷系统内的走向分析,讨论了碳二洗涤塔进料温度对乙烯冷剂负荷的影响;将液相甲烷从-140℃甲烷氢分离罐跨线补充至脱甲烷塔回流罐,可降低乙烯损失和乙烯冷剂消耗;最后,以碳二洗涤塔进料温度和跨线流量2个变量进行综合分析,得到了局部最优解。The separation of methane in high pressure demethanation system is discussed in this paper.Based on the analysis of the trend of methane in demethanation system,the influence of the feed temperature of C 2 condensing fractionator on the refrigerant load of ethylene is discussed.By adding liquid phase methane from the-140℃methane/hydrogen separation drum to the reflux drum of demethanizer,the ethylene loss and the refrigerant consumption of ethylene can be reduced.Finally,the comprehensive analysis of the feed temperature of C 2 condensing fractionator and the bypass line flow rate is carried out,and the local optimal solutions are obtained.

关 键 词：脱甲烷系统 甲烷分离 乙烯损失 冷剂消耗 

分 类 号：TQ2[化学工程—有机化工]