A TREATMENT SYSTEM OF LIQUEFIED GAS

摘要

The present invention relates to a treatment system for liquefied gas comprising: an evaporation gas supply line connected from a liquefied gas storage tank to a consumer; an evaporation gas compressor arranged on the evaporation gas supply line and compressing evaporation gas; and a sealing device for supplying sealed gas to the liquefied gas storage tank, the evaporation gas compressor or a heat medium pump. The sealing device includes: a liquefied nitrogen storage tank; and a nitrogen circulation sealing part connected to the liquefied nitrogen storage tank through a vaporized gas supply line and formed on the liquefied gas storage tank, the evaporation gas compressor or the heat medium pump. The treatment system for liquefied gas according to the present invention can prevent the liquefied gas stored in the liquefied gas storage tank from leaking to the outside, the evaporation gas in the evaporation gas compressor from leaking toward a drive part or a heat medium in the heat medium pump from leaking toward the drive part since the sealing device, which can utilize vaporized nitrogen generated by vaporizing liquefied nitrogen as the sealed gas of the liquefied gas storage tank, the evaporation gas compressor or the heat medium pump, is installed.