COOL DOWN SYSTEM AND METHOD OF CARGO TANK IN OFFSHORE STRUCTURE

摘要

Cargo tank cool down method of the offshore structure of the present invention comprises the steps of liquefying the gas produced in the gas well using a liquefied gas device, and supplying the liquefied gas into an end flash drum; Separating and exhausting the boil gas in the end flash drum; Supplying pressurized gas into the end flash drum to pressurize the liquefied gas to a constant pressure; Detecting whether the pressure in the end flash drum has risen to a preset pressure; Including when the pressure in the end flash drum rises to a predetermined pressure, supplying the pressurized liquefied gas in the end flash drum to the first cool down line through a second cool down line to cool down the cargo tank; do.