FIELD: gas industry.
SUBSTANCE: invention relates to gas industry and can be used for liquefaction of natural gas to produce finished LNG. In said methods and systems there used is device for separation of flash gas from flow of liquefied natural gas (LNG) to produce finished LNG and recovery of cold from flash gas. Proposed device comprises casing accommodating heat exchange zone accommodating coiled heat exchanger and separation zone. Heat exchange zone is located above the separation zone and communicates with it by fluid medium. Flash gas is separated from the ready LNG in the separation zone and flows upward from the separation zone into the heat exchange zone, where the cold is recovered from the separated flash gas.
EFFECT: technical result is improved compactness.
15 cl, 10 dwg, 3 tbl
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