| 摘要 |
<p>The present invention relates to an apparatus for reliquefying boil-off gas (BOG) generated in a storage tank of a ship for transporting cryogenic liquefied natural gas (LNG). According to the present invention, in an apparatus for reliquefying BOG of LNG, including a compressor for compressing BOG generated in a storage tank for LNG, a condenser for at least partially condensing BOG compressed by the compressor, and a nitrogen cycle device for supplying cold heat to the compressor, so as to return BOG reliquefied by the condenser to the storage tank, BOG compressed by the compressor is subjected to pre-cooling upstream of the condenser, and thus, there is an advantage in that the temperature of BOG can be constantly maintained in a preset range even though the quantity or temperature of BOG generated is changed. Further, according to the present invention, it is possible to reduce the size of the apparatus for reliquefying LNG BOG and stably manage a cryogenic range of nitrogen gas without a loss of cold heat by incorporating unit elements constituting a low temperature section into a cold box device in the apparatus for reliquefying LNG BOG.</p> |
