| 摘要 |
<p>According to an embodiment of the present invention, a treatment system of liquefied gas comprises: an evaporation gas supply line connected from a liquefied gas storage tank to source of demand; an evaporation gas compressor arranged on the evaporation gas supply line and pressurizing evaporation gas for multi-stage; a recovery line connected from the evaporation gas supply line to the liquefied gas storage tank; a gas-liquid separator arranged on the recovery line and separating evaporation gas pressurized in the evaporation gas compressor into gas and liquid; a flash gas circulation line in which flash gas separated with liquid in the gas-liquid separator is discharged and recovered; an evaporation gas heat exchanger arranged in upper stream and lower stream of the gas-liquid separator on the flash gas recovery line and exchanging heat between evaporation gas which is pressurized in three stages in the evaporation gas compressor and is recovered along the recovery line with evaporation gas supplied from the liquefied gas storage tank and evaporation gas supplied from the gas-liquid separator through the flash gas circulation line; and a Joule-Thomson valve arranged between the evaporation gas heat exchanger and the gas-liquid separator on the recovery line and decompressing evaporation gas which is heat-exchanged in the evaporation gas heat exchanger. According to the present invention, the treatment system of liquefied gas pressurizes evaporation gas generated in the liquefied gas storage tank by external heat penetration, supplies the same to source of demand, decompresses and liquefies a part of evaporation gas, and supplies the generated flash gas to the heat exchanger and uses the same by exchanging heat of evaporation gas, thereby improving liquefying efficiency.</p> |
