低碳化学与化工2024，Vol.49Issue(2)：80-88,9.DOI:10.12434/j.issn.2097-2547.20230163
联产LNG天然气低温-膜分离提氦工艺模拟设计
Simulation design of process of low-temperature and membrane separation for helium extraction and LNG co-production from natural gas
摘要
Abstract
In order to solve the problems of high energy consumption,low helium extraction efficiency and high economic cost of traditional helium extraction process,the process of low-temperature and membrane separation for helium extraction from natural gas and the process of low-temperature helium extraction and LNG co-production from natural gas were analyzed.Combined with the advantages of each process,the process of low-temperature and menbrane separtion for helium extraction and LNG co-production from natural gas was designed.Aspen HYSYS software was used to simulate the comprehensive energy consumption,helium recovery rate and helium content(volume fraction,the same as below)of the three processes.The results show that the helium recovery rate of the process of low-temperature and membrane separation for helium extraction and LNG co-production from natural gas is the highest when the condition of the minimum operating temperature is-188.3℃,which can reach 99.99%.The extracted helium content is the highest(up to 99.95%),and LNG production is 678.4 kmol/h,and LNG liquefaction rate is 94.6%.Compared with the operational parameters of the process of low-temperature and membrane separation for helium extraction from natural gas and the process of low-temperature helium extraction and LNG co-production from natural gas,the total compressor energy consumption of the process of low-temperature and membrane separation for helium extraction and LNG co-production from natural gas is reduced by 12.68%,and the comprehensive energy consumption of the device is reduced by 18.75%.The final process of low-temperature and membrane separation for helium extraction and LNG co-production from natural gas can effectively improve helium recovery rate and purity,reduce energy consumption and investment costs,maximize energy utilization,and produce two products(refined helium and LNG)at the same time.关键词
天然气/低温-膜分离/提氦/联产LNG/工艺模拟Key words
natural gas/low-temperature and membrane separation/helium extraction/LNG co-production/process simulation分类
能源科技引用本文复制引用
肖荣鸽,刘亚龙,庞琳楠,刘国庆,李雨泽..联产LNG天然气低温-膜分离提氦工艺模拟设计[J].低碳化学与化工,2024,49(2):80-88,9.基金项目
西安市科技计划(22GXFW0105). （22GXFW0105）
