一种大容积LNG储罐投运前珍珠岩补填充方法

本发明涉及一种大容积LNG储罐投运前珍珠岩补填充方法，所述方法包括：将储罐冷却后、投运前进行珍珠岩填充，冷却的液位达到0.5m-2.0m后开展储罐罐壁外侧膨胀珍珠岩保冷层的补充填充；待珍珠岩填充完毕后，使所述储罐继续进液，直至高液位；保持高液位不变，以便完成后续性能测试。本发明能够延缓大容积LNG储罐在服役期出现的罐壁漏冷，减少运行期内LNG储罐补充填充次数，提升储罐保冷性能和运行效率。 The invention relates to a method for supplementing and filling perlite before operation of a large-volume LNG (Liquefied Natural Gas) storage tank, which comprises the following steps: after the storage tank is cooled, performing perlite filling before operation, and after the cooling liquid level reaches 0.5-2.0 m, performing supplementing and filling of an expanded perlite cold insulation layer on the outer side of the tank wall of the storage tank; after perlite filling is completed, liquid is continuously fed into the storage tank until the liquid level is high; the high liquid level is kept unchanged, so that the subsequent performance test is completed. According to the invention, the tank wall cold leakage of the large-volume LNG storage tank in the service period can be delayed, the filling times of the LNG