Disclosed is a blow-down method for a re-liquefaction system in a ship, which may reduce thermal fatigue and prevent damage to a device. In the blow-down method for a re-liquefaction system in a ship, the re-liquefaction system allows evaporation gas generated from liquefied gas stored in a storage tank of the ship to be compressed in a compressor, be cooled and re-liquefied through a heat exchanger through a re-liquefaction line, pass through a gas-liquid separator, and be collected in the storage tank. The re-liquefaction system is provided with a pressure compensation line that bypasses the heat exchanger from a downstream of the compressor to be connected to an upper part of the gas-liquid separator, is provided with a nitrogen blanket line supplying nitrogen to the pressure compensation line to supply nitrogen to the pressure compensation line through the nitrogen blanket line when Trip occurs in the re-liquefaction system, and delivers the nitrogen supplied to the pressure compensation line to the downstream of the compressor and allows the nitrogen to pass through the heat exchanger along the re-liquefaction line to perform blowing down and N_2 purging of the compression gas and re-liquefaction gas filled in the heat exchanger and the re-liquefaction line.

    선박용 재액화 시스템의 블로다운 방법이 개시된다. 본 발명의 선박용 재액화 시스템의 블로다운 방법은. 선박의 저장탱크에 저장된 액화가스로부터 발생하는 증발가스를 압축기에서 압축하고 재액화라인을 통해 열교환기를 거쳐 냉각하고 재액화하여 기액분리기를 거쳐 상기 저장탱크로 회수하는 재액화 시스템에서, 상기 압축기의 하류에서 상기 열교환기를 우회하여 상기 기액분리기의 상부로 연결되는 압력보상라인을 마련하고, 상기 압력보상라인으로 질소를 공급하는 질소블랭킷라인을 마련하여, 상기 재액화 시스템의 Trip 발생 시, 상기 질소블랭킷라인을 통해 상기 압력보상라인으로 질소를 공급하고, 상기 압력보상라인으로 공급된 질소를 상기 압축기의 하류로 보내 상기 재액화라인을 따라 상기 열교환기를 통과시켜, 상기 열교환기 및 재액화라인에 채워진 압축가스 및 재액화가스를 배출(blow-down)하는 동시에 질소 퍼징(N2 purging)하는 것을 특징으로 한다.


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    Titel :

    Blow-Down Method For Reliquefaction System In Ship


    Weitere Titelangaben:

    선박용 재액화 시스템의 블로다운 방법


    Beteiligte:
    PARK JU WOON (Autor:in) / KIM SEON JIN (Autor:in) / CHOI WON JAE (Autor:in)

    Erscheinungsdatum :

    2023-04-26


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    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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