液化天然气轻烃分离流程模拟与优化  

SIMULATION AND OPTIMIZATION OF THE PROCESS OF LIGHT HYDROCARBONS RECOVERY FROM LNG

作　　者：华贲[1] 熊永强[1] 李亚军[1] 杨晓梅[1] 

机构地区：[1]"强化传热与过程节能教育部"重点实验室.华南理工大学

出　　处：《天然气工业》2006年第5期127-129,共3页Natural Gas Industry

基　　金：国家"973"计划项目(编号:G2000026307)的资助。

摘　　要：为利用进口液化天然气湿气中的轻烃资源来发展我国的乙烯工业,推荐了一种改进的LNG轻烃分离流程。其特点在于通过优化换热网络使压缩机的功耗比现有技术降低约40%,将脱甲烷塔的再沸器同脱乙烷塔的冷凝器进行热集成,使分离流程的能耗大为降低;同时,为提高乙烯原料裂解的选择性和转换率,此流程中将分离得到的C2+轻烃进一步分离,从而获得较纯的乙烷和丙烷作为乙烯裂解原料。随着中国开始大量进口LNG,应用该流程将LNG湿气中的轻烃分离出来,不仅可为我国的乙烯工业提供大量的优质原料,降低乙烯的生产成本,而且可以替代生产乙烯的石脑油,减少原油进口量。An improved light hydrocarbon separation flow was introduced to develop Chinese ethylene industry by utilizing the light hydrocarbon contained in the imported LNG. Compared to the former technologies, the process can not only reduce the work consumption of compressor by about 40% by optimizing the exchanger networks, but also considerably decrease the energy consumption by heat integration of the reboiler of demethanizer and the condenser of the deethanizer. Meanwhile, to enhance the cracking selectivity and conversion efficiency of the ethylene raw materials, the light hydrocarbon will be further separated to get purer ethane and propane stream. A great deal of light hydrocarbons can be separated from Chinese rising imported LNG, to be used as substitute raw materials instead of naphtha, which will provide sufficient premium raw materials and reduce production cost of ethylene, decrease the crude oil import as well.

关 键 词：液化天然气 轻烃 分离 流程 模拟 优化设计 乙烯工业 

分 类 号：TE646[石油与天然气工程—油气加工工程] TQ018[化学工程]