LNG加气站槽车BOG压缩液化回收研究
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摘要
近年来,在LNG加气站快速发展的同时,LNG车辆发展相对缓慢,导致LNG加气站蒸发气(boil-off gas,简称BOG)量较大,特别是LNG槽车卸车后残余压力为0.2～0.4 MPa的BOG,给LNG加气站带来了较大的经济损失和安全隐患。提出了基于BOG压缩机的BOG压缩液化工艺和装置,利用LNG冷量回收BOG,实现加气站BOG零排放。在此基础上,搭建了实验装置,并采用液氮和LNG开展了BOG回收实验。实验数据表明,当BOG和LNG质量比为3%时,该工艺BOG液化回收率在90%左右。由此可知,该工艺可以实现槽车的BOG快速高效回收。
In recent years,with the rapid development of LNG filling station,the amount of boiloff gas(BOG)is very large because of the relatively slow development of LNG vehicles.Especially after LNG unloading for the LNG tanker,the pressure of BOG is 0.2 to 0.4 MPa.The BOG process related to energy consumption and safe operation is one of the critical issues that should be considered at LNG filling station.A set of BOG compression and re-liquefaction process and equipment is established by using the LNG cold energy to recover BOG to avoid energy dissipation and environmental pollution caused by BOG direct discharge.A BOG recovery experimental setup is built and some experiments are carried out with liquid nitrogen and LNG.The results show that the ratio of BOG recovery is 90% when the ratio of BOG and LNG is 3%.Accordingly,the process of BOG compression and re-liquefaction is an effective way for BOG recovery.
In recent years,with the rapid development of LNG filling station,the amount of boiloff gas(BOG)is very large because of the relatively slow development of LNG vehicles.Especially after LNG unloading for the LNG tanker,the pressure of BOG is 0.2 to 0.4 MPa.The BOG process related to energy consumption and safe operation is one of the critical issues that should be considered at LNG filling station.A set of BOG compression and re-liquefaction process and equipment is established by using the LNG cold energy to recover BOG to avoid energy dissipation and environmental pollution caused by BOG direct discharge.A BOG recovery experimental setup is built and some experiments are carried out with liquid nitrogen and LNG.The results show that the ratio of BOG recovery is 90% when the ratio of BOG and LNG is 3%.Accordingly,the process of BOG compression and re-liquefaction is an effective way for BOG recovery.
引文
[1]鲍磊,何才宁,党文义,等.LNG加气站BOG“零排放”技术研究[C]//第二届中国液化天然气储运技术交流会论文集.广州:中国石油学会,2016.
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[4]焦纪强,彭斌,张春燕.LNG加气站BOG再液化工艺研究及经济性分析[J].石油与天然气化工,2017,46(6):45-50.
[5]吴晓南,韩晓瑜,陈利琼,等.LNG加气站BOG再液化工艺[J].油气储运,2015,34(6):607-610.
[6]王坤,巨永林.LNG储运装置的小型BOG回收再液化方法的对比分析[J].低温与超导,2017,45(9):22-25.
[7]张宁,徐雅,沈惬,等.基于大冷量斯特林制冷机的LNG加气站BOG再液化回收技术[J].化工学报,2015,66(增刊2):166-171.
[8]李兆慈,姜勇,刘照辰.LNG加气站BOG回收利用方法[J].山东化工,2017,46(23):175-177.
[9]王景心,巨永林.车载LNG绝热气瓶的BOG吸附回收装置设计与性能测试[J].低温工程,2017(1):36-40.
[10]廖晓梦,张昀,伍婷.LNG加气站BOG用于站内生活用气的可行性探讨[J].石油与天然气化工,2016,45(5):43-45.
[2]何东红,盛璘,刘俊德,等.减少LNG加气站BOG放散量的措施[J].煤气与热力,2014,34(11):16-19.
[3]杨国柱.使用液氮回收LNG加气站BOG的可行性分析[J].煤气与热力,2014,34(10):35-37.
[4]焦纪强,彭斌,张春燕.LNG加气站BOG再液化工艺研究及经济性分析[J].石油与天然气化工,2017,46(6):45-50.
[5]吴晓南,韩晓瑜,陈利琼,等.LNG加气站BOG再液化工艺[J].油气储运,2015,34(6):607-610.
[6]王坤,巨永林.LNG储运装置的小型BOG回收再液化方法的对比分析[J].低温与超导,2017,45(9):22-25.
[7]张宁,徐雅,沈惬,等.基于大冷量斯特林制冷机的LNG加气站BOG再液化回收技术[J].化工学报,2015,66(增刊2):166-171.
[8]李兆慈,姜勇,刘照辰.LNG加气站BOG回收利用方法[J].山东化工,2017,46(23):175-177.
[9]王景心,巨永林.车载LNG绝热气瓶的BOG吸附回收装置设计与性能测试[J].低温工程,2017(1):36-40.
[10]廖晓梦,张昀,伍婷.LNG加气站BOG用于站内生活用气的可行性探讨[J].石油与天然气化工,2016,45(5):43-45.