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1. (WO2017039270) BOIL-OFF GAS RELIQUEFACTION METHOD

Pub. No.:    WO/2017/039270    International Application No.:    PCT/KR2016/009623
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Aug 31 01:59:59 CEST 2016
IPC: F17C 9/02
F17C 6/00
B63B 25/16
F25J 1/00
Applicants: KOREA GAS CORPORATION
한국가스공사
Inventors: LEE, Sang Gyu
이상규
LEE, Chul Gu
이철구
LEE, Yeong Beom
이영범
SHON, Young Soon
손영순
KIM, Seog Soon
김석순
KIM, Dong Hyuk
김동혁
KIM, Joo Shin
김주신
Title: BOIL-OFF GAS RELIQUEFACTION METHOD
Abstract:
The present invention relates to a boil-off gas reliquefaction method comprising: a compression step for having a first stream comprising boil-off gas generated in a storage tank pass through a first heat exchanger, then compressing same; a first cooling step for, after the compression step, introducing the compressed first stream into the first heat exchanger and cooling same by heat exchanging same with a first stream that has not been compressed yet that is introduced into the first heat exchanger from the storage tank; a second cooling step for introducing the first stream cooled in the first cooling step into a second heat exchanger and additionally cooling same by heat exchanging same with a second stream comprising a refrigerant; and a separation step for, after the second cooling step, expanding the first stream, then separating same into a liquid-phase third stream and a gas-phase fourth stream.