A TREATMENT SYSTEM OF LIQUEFIED NATURAL GAS

摘要

The present invention relates to an LNG treatment system. The LNG treatment system comprises an LNG supply line which is connected to users from an LNG storage tank; a pump which is in the middle of the LNG supply line and pressurizes LNG discharged from the LNG storage tank; evaporative gas compressors which pressurize evaporative gas in stages; a supply line which is connected to the users from the evaporative gas compressors to supply high pressure LNG; an LNG heat exchanger which is placed in the LNG supply line between the pump and users and exchanges heat of the evaporative gas with LNG supplied from the pump; an evaporative gas decompressing device which decompresses the evaporative gas pressurized at more than 200bar and LNG supplied through the LNG supply line and decompressed LNG are supplied to the pump. The LNG treatment system compresses the evaporative gas generated from the LNG storage tank due to heat penetration in stages and supplies the LNG to the users with low pressure or the system supplies the LNG to the users with high pressure by decompressing the LNG after compressing the LNG in stages so that the system prevent the waste of the evaporative gas.