PROBLEM TO BE SOLVED: To provide a boil-off gas recovery system in which oil hardly enters a tank when boil-off gas compressed by an oil feeding type compressor is recovered.SOLUTION: A boil-off gas recovery system 1 comprises: a tank 2 that stores liquefied gas; an oil feeding type compressor 3b that compresses boil-off gas generated by evaporation of a portion of the liquefied gas in the tank 2; and a reliquefying system 9 that liquefies the boil-off gas compressed by the oil feeding type compressor 3b, and returns the liquefied gas thereby liquefied, to the tank 2. The reliquefying system 9 comprises: an oil condensation heat exchanger 11 that cools the boil-off gas to a temperature equal to or lower than the condensation temperature of oil included in the boil-off gas; a separator 14 that separates the oil condensed by the oil condensation heat exchanger 11, from the boil-off gas; and a reliquefying part that liquefies the boil-off gas from which the oil has been separated.SELECTED DRAWING: Figure 2

    【課題】給油式の圧縮機で圧縮されたボイルオフガスを回収する際に油分がタンクに混入しにくいボイルオフガス回収システムを提供すること。【解決手段】ボイルオフガス回収システム1は、液化ガスを貯蔵したタンク2と、タンク2内の液化ガスの一部の蒸発により発生したボイルオフガスを圧縮する給油式の圧縮機3bと、給油式の圧縮機3bで圧縮された前記ボイルオフガスを液化し、その液化した前記液化ガスをタンク2に戻す再液化システム9と、を備える。再液化システム9は、前記ボイルオフガスに含まれる油分の凝縮温度以下の温度までボイルオフガスを冷却する油分凝縮用熱交換器11と、油分凝縮用熱交換器11で凝縮した前記油分を前記ボイルオフガスから分離するセパレータ14と、前記油分が分離された前記ボイルオフガスを液化する再液化部と、を有する。【選択図】図2


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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 :

    2018-08-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS



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