BOIL-OFF GAS RELIQUEFYING METHOD

PROBLEM TO BE SOLVED: To provide a boil-off gas reliquefying method reducing the quantity of flash gas generated in reliquefying boil-off gas generated from a liquefied gas storage tank, to return the obtained liquid to the storage tank. SOLUTION: Boil-off gas generated from a storage tank 1 is comp...

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Bibliographische Detailangaben
Hauptverfasser:	MIHASHI KOJI, NAKAMURA MORITAKA, OMORI MOTOHIRO, HATANAKA NOBUO, TOMINAGA EIJI, OKA MASARU, OTAKE KAZUHIKO, IRIE TOSHIKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES FIXED-CAPACITY GAS-HOLDERS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING MIXTURES BY PRESSURE AND COLD TREATMENT REFRIGERATION OR COOLING STORING OF DISTRIBUTING GASES OR LIQUIDS VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a boil-off gas reliquefying method reducing the quantity of flash gas generated in reliquefying boil-off gas generated from a liquefied gas storage tank, to return the obtained liquid to the storage tank. SOLUTION: Boil-off gas generated from a storage tank 1 is compressed by a BOG compressor 2 and then cooled by a liquefying part 5 of a heat exchanger 3. The obtained liquid in a saturated state is once led to a liquid separating drum 6 where noncondensable substance is separated. The liquid is then led to a sub-cooling part 7 of the heat exchanger 3 and cooled again into an overcooled state to return the liquid to the storage tank 1.