DEVICE AND METHOD FOR PRESSURE CONTROL OF CARGO TANK OF LIQUEFIED NATURAL GAS CARRIER

A pressure control device of a cargo tank (1) for supplying the BOG of the stored liquefied natural gas producing inside the cargo tank to a incineration treating system (6) through compressors so as to control a pressure in the cargo tank (1), wherein a re−liquefying device (5) is disposed on the d...

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Bibliographische Detailangaben
Hauptverfasser:	IRIE, TOSHIKAZU, OHTAKE, KAZUHIKO, OKA, MASARU, TOMINAGA, EIJI, MIHASHI, TAKASHI, OMORI, MOTOHIRO, HATANAKA, NORIO, NAKAMURA, MORITAKA
Format:	Patent
Sprache:	eng ; fre ; jpn
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS EQUIPMENT FOR SHIPPING 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 PERFORMING OPERATIONS REFRIGERATION OR COOLING RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS STORING OF DISTRIBUTING GASES OR LIQUIDS TRANSPORTING VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	A pressure control device of a cargo tank (1) for supplying the BOG of the stored liquefied natural gas producing inside the cargo tank to a incineration treating system (6) through compressors so as to control a pressure in the cargo tank (1), wherein a re−liquefying device (5) is disposed on the downstream side of the first and second compressors (3, 4), i.e., on the upstream side of the cargo tank (1), and the BOG exhausted from the second compressor (4) is liquefied by the re−liquefying device (5) and returned again to the cargo tank (1). L'invention concerne un dispositif régulateur de pression destiné à une citerne (1) de charge qui dirige les gaz évaporés dans la citerne, provenant du gaz naturel liquéfié, dans un système (6) de traitement par incinération à travers de compresseurs afin de régler la pression dans la citerne (1) de charge. Un dispositif de reliquéfaction est installé en aval du premier et du second compresseur (3, 4), en amont de la citerne (1), et les gaz évaporés émis par le second compresseur (4) sont liquéfiés par ce dispositif (5) de reliquéfaction et renvoyés dans la citerne de charge.