PLANT AND METHOD FOR REPEATED LIQUEFACTION OF STRIPPING GAS FOR SHIP Russian patent published in 2020 - IPC B63B25/16 F17C6/00 F17C9/02 F25J1/00 

FIELD: transportation.

SUBSTANCE: invention relates to ships for transportation of liquefied gas, in particular, to device for repeated liquefaction, which uses stripping gas as cooling fluid medium in order to re-liquefy the stripping gas formed from storage tank of liquefied gas, provided on the ship. Device for repeated liquefaction of stripped gas, provided on vessel for transportation of liquefied gas, comprises: multi-stage compression unit for compression by means of multiple separate stages of compression of stripping gas formed from storage tank of liquefied gas; heat exchanger, in which the evaporating gas formed from the storage tank, and the evaporating gas compressed by means of the multistage compression unit, exchange heat; evaporator for heat exchange of evaporated gas cooled by means of heat exchanger, and separate liquefied gas supplied to the fuel demand section on the vessel, and thus cooling the stripping gas; intermediate cooler for cooling strip-off gas, which was cooled by means of heat exchanger, and expansion means for branching a portion of stripping gas, which is fed into an intermediate cooler, and expansion thereof, wherein the remaining stripping gas, which is fed into the intermediate cooler, exchanges heat in the intermediate cooler with the stripping gas.

EFFECT: proposed plant and method for re-liquefaction of stripping gas for ships allows repeatedly liquefying a gas, for example ethane, without separate independent cooling cycle.

16 cl, 9 dwg