LNG接收站回收乙烷的工艺流程分析-001f883b.pdf

工程设计

DOI：10.3969/j.issn.1001-2206.2024.03.007

LNG接收站回收乙烷的工艺流程分析

121222

贾保印，刘峰，刘以荣，戚家明，胡本源，庄芳

1.中国寰球工程有限公司，北京100012

2.昆仑能源有限公司，北京100101

摘要：从LNG接收站中分离出乙烷及其他轻烃不但可以避免与下游燃气产生互换性问题，还能为下游石油化

工提供乙烷原料，可获得额外的经济效益。依托LNG接收站的实际运行维护情况，开展从LNG接收站中分离

乙烷的方案研究，并从原料稳定性、能耗、电气化率、安全泄放、冷能利用等方面对比气体分离和液体分离

2种工艺流程。研究表明：液相分离工艺具有原料操作温度和压力波动性小、无需天然气增压、自用自身冷量、

负荷调节范围广、就地取材利用环境热源、乙烷回收率高等特点，同时对LNG接收站外输波动规律的匹配性

强；此外，LNG接收站开展乙烷回收对天然气管网安全运行、提升LNG接收站经济效益、冷热能量综合利用，

以及上下游一体化发展，具有十分重要的意义。

关键词：LNG接收站；分离；乙烷；自身冷量；回收率；膨胀机

TechnicalprocessanalysisofrecoveryofethaneinLNGterminalstation

121222

JIABaoyin,LIUFeng,LIUYirong,QIJiaming,HUBenyuan,ZHUANGFang

1.ChinaHuanqiuContractingEngineeringCo.,Ltd.,Beijing100012,China

2.KunlunEnergyCompanyLimited,Beijing100101,China

Abstract：TheextractionofethaneandlighthydrocarbonsfromtheLNGreceivingterminalcannotonlyavoidinterchangeability

problemswithdownstreamgasbutalsoprovideethanefeedstockfordownstreampetrochemicalplantsforadditionaleconomicvalue.

RelyingontheactualoperationandmaintenanceprocedureofanLNGreceivingterminal,theresearchontheschemeofseparating

ethanefromtheLNGreceivingstationiscarriedoutandtwodiverseethaneextractionprocessesareassessedfromtheviewofraw

materialstability,energyconsumption,electrificationrate,emissionsafety,coldenergyutilizationandsoon.Thestudyindicatesthatthe

LNGethaneextractionprocessischaracterizedbylowvolatilityoffeedstockoperatingtemperatureandpressure,unnecessityofnatural

gaspressurization,self-coolingcapacity,widerangeofloadadjustment,localuseofenvironmentalheatsource,highethaneyieldand

alsostrongmatchingtothesend-outfluctuationofLNGreceivingstation.Inaddition,ethanerecoveryinLNGterminalstationsisof

greatsignificanceforthesafeoperationofnaturalgaspipelinenetworks,theimprovementofeconomicbenefitsofLNGterminalstations,