LNG接收站BOG回收与提氦联产工艺设计及优化  

Design and optimization of BOG recovery and helium extraction combined production process at LNG receiving station

作　　者：肖荣鸽[1] 刘鸿嘉 李雨泽 庞琳楠 夏海平 张青松 Xiao Rongge;Liu Hongjia;Li Yuze;Pang Linnan;Xia Haiping;Zhang Qingsong(Xi’an Shiyou University,School of Petroleum Engineering,Xi’an 710065,China)

机构地区：[1]西安石油大学石油工程学院,西安710065

出　　处：《低温工程》2024年第4期64-70,共7页Cryogenics

基　　金：西安市科技计划高校人才服务企业项目(22GXFW0105)。

摘　　要：为了解决当前BOG回收工艺以及BOG提氦工艺存在回收率低和高能耗等问题,提出一种联产工艺,将LNG接收站BOG回收工艺与BOG提氦工艺相结合。使用HYSYS模拟单一工艺和联产工艺,分析影响工艺综合能耗及粗氦浓度的关键参数。保持粗氦浓度为92.61%,以综合能耗最小为优化目标,结合响应面法和遗传算法对关键参数进行优化,得到最优参数:BOG压缩机出口压力为600 kPa,低压泵出口压力700 kPa,海水泵出口压力4 000 kPa,深冷塔进料温度为-150℃,深冷塔进料压力为1 000 kPa。与单一工艺相比,该联产工艺有明显的节能优势,综合能耗减少16.17%,BOG回收率达到84.21%,粗氦的回收率和浓度分别达到95.83%和92.61%。结论表明:该联产工艺在能耗和投资成本方面具备明显的优势。In order to solve the problems of low recovery rate and high energy consumption in the current BOG recovery process and BOG helium extraction process,a cogeneration process was proposed,which combined the LNG receiving station BOG recovery process with the BOG helium extraction process.Single process and combined production process were simulated using HYSYS to analyze the key parameters that affect the comprehensive energy consumption and crude helium concentration of the process.Maintaining a crude helium concentration of 92.61%,with the objective of minimizing comprehensive energy consumption,the key parameters were optimized using response surface methodology and genetic algorithm.The optimal parameters were obtained,BOG compressor outlet pressure of 600 kPa,low-pressure pump outlet pressure of 700 kPa,seawater pump outlet pressure of 4 000 kPa,feed temperature of-150 ℃ in the cryogenic tower,and feed pressure of 1 000 kPa in the cryogenic tower.Compared with the single process,this cogeneration process had significant energy-saving advantages,reducing comprehensive energy consumption by16.17%,achieving a BOG recovery rate of 84.21%,and a crude helium recovery rate and concentration of 95.83% and 92.61%,respectively.The results indicates that this cogeneration process has significant advantages in energy consumption and investment costs.

关 键 词：LNG接收站 BOG回收 BOG提氦 联产工艺 HYSYS 参数优化 能耗 

分 类 号：TB662[一般工业技术—制冷工程]