天然气及液化天然气蒸发气提氦技术研究进展  

Research progress of helium extraction of natural gas and liquefied natural gas boil-off gas

作　　者：张丽萍 巨永林[1] ZHANG Liping;JU Yonglin(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《天然气化工—C1化学与化工》2022年第5期32-41,共10页Natural Gas Chemical Industry

摘　　要：为了更系统地了解现有提氦技术及其工艺流程,总结了国内外近几年天然气及液化天然气蒸发气(LNG-BOG)为原料气的提氦技术及其工艺流程,分析了二者在提氦流程方面的异同。BOG提氦流程往往需要复温装置,在BOG满足装置提氦要求下,通常不需要脱酸等预处理环节,且其含氦量较高,相较于低含氦天然气提氦技术更加经济高效。天然气主要成分与BOG相同,因此所采用提氦技术相同,主要包括低温法、膜分离法、变压吸附(PSA)法,以及膜分离-低温法、膜分离-PSA法和深冷-膜分离-PSA法等。最后,对未来BOG提氦技术的研究方向进行了展望。In order to systematically understand the existing helium extraction technology and process flow, the helium extraction technology and process ffow of natural gas and boil-off gas of liquefied natural gas(LNG-BOG) as raw gas at home and abroad in recent years were summarized, and the similarities and differences between the two in helium extraction process were analyzed. The BOG helium extraction process often requires a reheating device. When BOG meets the requirements of helium extraction of the device,it usually does not need the pretreatment steps such as deacidification, and its helium content is high, which is more economical and efficient than the helium extraction technology of low helium natural gas. The main components of natural gas are the same as BOG, so the helium extraction technologies are the same, mainly including low temperature method, membrane separation method, pressure swing adsorption(PSA) method, membrane separation-low temperature method, membrane separation-PSA method, cryogenic-membrane separation-PSA combination method and so on. Finally, the future research on BOG helium extraction technology was prospected.

关 键 词：天然气 蒸发气 低温法 膜分离法 变压吸附 

分 类 号：TE645[石油与天然气工程—油气加工工程] TQ116.41[化学工程—无机化工]