PROBLEM TO BE SOLVED: To efficiently recover boil-off gas in a liquefied gas carrier.SOLUTION: BOG in a cargo tank 11 is sent as cooling side gas to a heat exchanger 14 through a first pipe 12, and additionally compressed in a multistage high-pressure gas compressor 15. Medium-pressure BOG is extracted from an intermediate stage of the high-pressure gas compressor 15, transferred as cooled side gas to the heat exchanger 14 through a second pipe 16, cooled, expanded by a Joule-Thomson valve 17, partially liquefied, and transferred to a separator 18. A gas component separated by the separator 18 is returned to the first pipe 12 on the upstream side of the heat exchanger 14 via a pressure adjustment valve 19, and a liquid component is returned to the cargo tank 11 by using a transfer pump 21.SELECTED DRAWING: Figure 1

    【課題】液化ガス運搬船において、ボイルオフガスを効率的に回収する。【解決手段】カーゴタンク11内のBOGを第1配管12を通して熱交換器14に冷却側ガスとして送り、更に多段の高圧ガスコンプレッサ15において圧縮する。高圧ガスコンプレッサ15の途中段から中圧BOGを抽気し、第2配管16を通して熱交換器14に被冷却側ガスとして移送して冷却し、ジュールトムソンバルブ17で膨張させ、一部液化してセパレータ18へ移送する。セパレータ18で分離されたガス成分を圧力調整弁19を介して第1配管12の熱交換器14の上流側へ還流し、液体成分を移送ポンプ21を用いてカーゴタンク11に戻す。【選択図】図1


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    Title :

    BOIL-OFF GAS RECOVERY SYSTEM


    Additional title:

    ボイルオフガス回収システム


    Contributors:

    Publication date :

    2017-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES



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