LNG蒸发气中氦气提取技术及应用  

HELIUM EXTRACTION TECHNOLOGY FOR LNG BOIL-OFF GAS AND ITS APPLICATION

作　　者：陈兵 任金平[2] 孟国亮 芦娅妮 于春柳[2] 韩泽 Chen Bing;Ren Jinping;Meng Guoliang;Lu Yani;Yu Chunliu;Han Ze(Ningxia Tianlifeng Energy Co.,Ltd.,Wuzhong,Ningxia,751000;College of Chemistry and Chemical Engineering,Longdong University,Qingyang,Gansu,745000;College of Mechanical and Electrical Engineering,Lanzhou Institute of Technology,Lanzhou,Gansu,730050)

机构地区：[1]宁夏天利丰能源利用有限公司,宁夏吴忠751000 [2]陇东学院化学化工学院,甘肃庆阳745000 [3]兰州工业学院机械工程学院,甘肃兰州730050

出　　处：《石油化工设计》2023年第1期6-9,I0001,共5页Petrochemical Design

基　　金：甘肃省高等学校创新能力提升项目(2022A-131,2021B-317);庆阳市科技计划项目(QY-STK-2022A-008);宁夏回族自治区重点研发计划项目(2021BDE92029,2022BFH02002)。

摘　　要：近年来,发现鄂尔多斯盆地气田天然气液化生成的LNG蒸发气中氦含量高达3.3%,具有较大的开发利用价值。文章在阐述氦气资源和介绍市场前景基础上,分析目前国内外各类氦气生产工艺,重点对鄂尔多斯盆地气田某年产20万t的LNG工厂每日约1.56×10^(4) m^(3)的含氦蒸发气处理过程中氦气提取进行工艺设计,选择采用膜分离+PSA联合的提氦工艺,提取LNG蒸发气中的氦气,该工艺不仅有效降低了设备的能耗,提高了LNG工厂生产效率,而且提取的氦气纯度高。In recent years,it has been found that the helium content of LNG boil-off gas produced by natural gas liquefaction in Ordos Basin gas field is up to 3.3%,which has great development and utilization value.Based on the description of helium resources and market prospects,this paper analyzes various helium production technologies at home and abroad,and focuses on the design of helium extraction process in the 15600 m^(3)/d helium-containing boil-off gas treatment process of a 200 kt/a LNG plant in Ordos Basin gas field.The helium extraction process combining membrane separation with PSA is selected to extract helium from LNG boil-off gas.This process not only effectively reduces the energy consumption of equipment and improves the production efficiency of LNG plant,but also extracts helium with high purity.

关 键 词：天然气 LNG蒸发气 氦气 氦气提取 

分 类 号：TE64[石油与天然气工程—油气加工工程] TQ116.41[化学工程—无机化工]