액화천연가스 저장탱크의 단열구조가 개시된다. 본 발명에 따른 액화천연가스 저장탱크의 단열구조는, 선체 내벽 상에 2차 단열벽, 2차 밀봉벽, 1차 단열벽 및 1차 밀봉벽이 순차적으로 적층되어 형성되는 이중 방벽 구조의 액화천연가스 저장탱크에 있어서, 2차 단열벽은 서로 강성이 다른 단열층으로 구성되는 트랜지션 구역(transition area)을 포함하고, 1차 단열벽은, 2차 단열벽에서 서로 다른 강성을 가지는 단열층이 마주하는 경계부와 대응하는 위치의 1차 단열벽의 하부에 형성되는 하부 슬릿과, 1차 단열벽의 면내 방향으로 연속되는 판 형태로 마련되어, 1차 단열벽의 내부에 삽입 배치되는 중앙부 강화 플레이트를 포함함으로써, LNG에 의한 열수축시 서로 강성이 다른 단열층의 열수축량 차이에 의해 발생하는 높이 단차에 의해 밀봉벽의 금속 멤브레인이 손상되는 것을 효과적으로 방지하는 효과가 있다.

    Disclosed is an insulation structure of a liquefied natural gas (LNG) storage tank. According to the present invention, in the insulation structure of a liquefied natural gas storage tank, the liquefied natural gas storage tank has a dual barrier structure in which a secondary insulation wall, a secondary sealing wall, a primary insulation wall, and a primary sealing wall are sequentially stacked on an inner wall of a hull. The secondary insulation wall includes a transition area consisting of insulation layers with different rigidities. The primary insulation wall includes: a lower slit formed in a lower portion of the primary insulation wall at a position corresponding to a border unit in which insulation layers with different rigidities face each other in the secondary insulation wall; and a center portion reinforcement plate provided in a continuous plate form in the in-plane direction of the primary insulation wall to be inserted and arranged in the primary insulation wall. A metal membrane of the sealing walls is effectively prevented from being damaged by the height difference created by the differences in thermal contraction amounts of insulation layers with different rigidities when thermally contracted by LNG.


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    Title :

    Insulation Structure of Liquefied Natural Gas storage Tank


    Additional title:

    액화천연가스 저장탱크의 단열구조


    Publication date :

    2024-05-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    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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