长江内河LNG接收中转站BOG处理面临的主要问题及解决方案  

Main problems of and solutions to BOG treatment at LNG terminals along Yangtze River

作　　者：李恩道[1] 刘淼儿[1] 曾伟平[1] LI Endao;LIU Miaoer;ZENG Weiping(CNOOC Gas&Power Group,Beijing100028,China)

机构地区：[1]中海石油气电集团有限责任公司,北京100028

出　　处：《中国海上油气》2021年第4期179-185,共7页China Offshore Oil and Gas

基　　金：中国工程院面向2035海洋能源开发及核心技术战略研究“长江经济带天然气供需保障及站点布局策略研究(编号:2020-ZD-13-08)”部分研究成果。

摘　　要：长江内河LNG项目资源采用沿海接收站二程转运方式运输,饱和压力高,LNG运输船在内河航行时要受到航速限制且不能夜航。本文基于BOG分析程序计算了小型LNG运输船在长江内河航行期间BOG蒸发及消耗情况,分析了长江内河LNG接收中转站BOG处理面临的主要问题,包括装载的LNG货物温度高,装船后船舱压力大;航行速度低,BOG无法被完全消耗;卸料过程产生BOG量大,处理困难等。在此基础上,提出了降低新建内河小型LNG运输船的日蒸发率,在接收站内配置大功率BOG压缩机,在小型LNG转运船上增加BOG再液化装置以及从政策方面推动取消长江内河LNG运输船不能夜航的限制等解决方案,从而为长江内河LNG接收中转站BOG处理提供了参考依据。LNG carriers are used for the Yangtze River LNG project to transport LNG by transshipment through coastal transfer terminal.The problems for the LNG carrier to deal with is the high BOG(boil off gas)saturation pressure,limited speed of LNG carrier and forbidden night navigation in the inland river.Based on the BOG analysis program,the BOG evaporation and consumption in a small LNG carrier are calculated during its navigation in the inland channel of Yangtze River,also the main problems in BOG treatment at LNG terminals along Yangtze River are analyzed,including high temperature of the loaded LNG cargo and high pressure in the vessel’s bunker after loading,insufficient consumption of BOG due to low LNG vessel speed,difficult treatment of large amount of BOG generated in offloading.On this basis,this paper proposes such feasible solutions as building new small LNG carriers that have lower BOF(boil off rate),deploying big power BOG compressors in the LNG terminal,installing a BOG re-liquefaction plant on the small LNG carrier,and implementing policies more flexibly to release the restriction of forbidden night navigation of LNG carrier in inland water channels,thus providing a reference for BOG treatment at LNG terminals along the inland Yangtze River.

关 键 词：长江内河LNG接收中转站 LNG运输 BOG处理 主要问题 解决方案 

分 类 号：TE835[石油与天然气工程—油气储运工程]