FLNG FLNG FLNG and Ballast Water Control Method for FLNG

摘要

Disclosed is a FLNG ballast water control method including a plurality of membrane-type storage tanks, a self-contained storage tank installed at a forefoot portion or a stern portion, and a ballast tank installed at the opposite side of the self-contained storage tank.The FLNG ballast water control method comprises the steps of 1) injecting ballast water into the ballast tank while delivering liquefied natural gas from the natural gas liquefaction plant to the independent storage tank, 2) (Hereinafter referred to as "opposite side storage tank") located at the opposite side of the storage tank, and while the liquefied natural gas is fed until 30% of the opposite side storage tank is filled, the liquefied natural gas Discharging the ballast water from the ballast tank when the amount of liquefied natural gas in the independent storage tank is reduced, and 3) discharging the ballast water from the independent storage tank to the central membrane-Tank (hereinafter referred to as " central storage tank "), and 30% of the central storage tank is filled Maintaining the amount of ballast water in the ballast tanks while delivering the liquefied natural gas until 4; and 4) transferring liquefied natural gas from the independent storage tanks to the opposite storage tanks until 70% of the opposite storage tanks are filled. The ballast water is injected into the ballast tank when the amount of liquefied natural gas in the independent storage tank is increased and the ballast water is discharged from the ballast tank when the amount of liquefied natural gas in the independent storage tank is reduced .;