PROBLEM TO BE SOLVED: To provide a boil-off gas recovery system that can restrain performance deterioration of a heat exchanger in a reliquefying system for boil-off gas.SOLUTION: A boil-off gas recovery system 1 comprises: a tank 2 that stores liquefied gas 100; a reciprocating compressor 3 to which poly-α-olefin lubricating oil is supplied, and that compresses boil-off gas 100A generated by evaporation of a portion of the liquefied gas 100 in the tank 2; a separator 14 that separates the poly-α-olefin lubricating oil included in the boil-off gas discharged from the compressor 3; and a reliquefying system 9 that comprises a heat exchanger that cools the boil-off gas from which the poly-α-olefin lubricating oil has been separated by the separator 14, by exchanging heat with the boil-off gas to be supplied to the compressor 3 from the tank 2, and that returns the liquefied boil-off gas to the tank 2.SELECTED DRAWING: Figure 1

    【課題】ボイルオフガスの再液化システムにおける熱交換器の性能低下を抑制することが可能なボイルオフガス回収システムを提供する。【解決手段】ボイルオフガス回収システム1は、液化ガス100を貯蔵したタンク2と、ポリ−α−オレフィン系潤滑油が供給されると共に、タンク2内の液化ガス100の一部の蒸発により発生したボイルオフガス100Aを圧縮する往復動式の圧縮機3と、圧縮機3から吐出されたボイルオフガスに含まれるポリ−α−オレフィン系潤滑油を分離するセパレータ14と、セパレータ14によりポリ−α−オレフィン系潤滑油が分離されたボイルオフガスを、タンク2から圧縮機3に供給されるボイルオフガスとの熱交換により冷却する熱交換器を有し、液化したボイルオフガスをタンク2に戻す再液化システム9と、を備えている。【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 :

    2018-08-16


    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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