摘要
一般LNG接收站产生的BOG中含有大量的氮气,热值低,若直接压缩成CNG则严重影响汽车的动力性能;若利用再冷凝工艺采用低温BOG压缩机,因低温BOG压缩机太昂贵,对于小型LNG接收站来说不经济。为此提出一种常温压缩再冷凝的BOG回收工艺,即先将BOG加热到常温再增压,自身预冷回收冷量后再和增压后的过冷LNG混合液化,即可得到合格的LNG,其氮气、甲烷含量和热值均满足要求。通过HYSYS软件模拟,证明采用这种工艺流程完全可以回收一些小型LNG接收站产生的BOG,避免了BOG资源的浪费。
Due to the BOG has a lot of nitrogen, the heat value is too low, if it is compressed as CNG（Compressed Natural Gas）directly, the dynamic performance of vehicles are affected seriously; if the reliquefaction is used only,it is not cost-efficient to a small LNG receiving terminal. It is the very way by normal temperature compression and mixed reliquefaction,the BOG is mixed and re-liquefied,the content of nitrogen and methane is qualified,so the mixed LNG may be loaded or filled.So the article studies a recovery process of BOG by normal temperature compression and mixed reliquefaction and by HYSYS software simulation,the result is proved that the process may recover completed the BOG of the small LNG receiving terminal,avoiding the wasting of resources.
出处
《油气田地面工程》
2016年第5期107-109,共3页
Oil-Gas Field Surface Engineering
关键词
BOG
回收工艺
LNG接收站
再液化
模拟
boil-off gas
recovery
LNG receiving terminal
reliquefaction
simulation
