Tank system comprises a liquefied gas-tank with means for supplying boil-off gas from the tank forth in a first condenser such as in a first heat exchanger and in a second condenser such as in a second heat exchanger

摘要

The tank system comprises an liquefied gas-tank (1) with means for supplying boil-off gas from the tank forth in a first condenser such as in a first heat exchanger (14) and in a second condenser such as in a second heat exchanger (17), where the second condenser is provided so that the boil-off gas able to cool at lower temperatures in comparison to the first condenser. A pump is provided for pumping of condensed boil-off gas in the tank in the second condenser. The liquefied gas is stored in the tank that consists of easily liquefiable hydrocarbon-compounds with three or four carbon atoms. The tank system comprises an liquefied gas-tank (1) with means for supplying boil-off gas from the tank forth in a first condenser such as in a first heat exchanger (14) and in a second condenser such as in a second heat exchanger (17), where the second condenser is provided so that the boil-off gas able to cool at lower temperatures in comparison to the first condenser. A pump is provided for pumping of condensed boil-off gas in the tank into the second condenser. The liquefied gas is stored into the tank that consists of easily liquefiable hydrocarbon-compounds with three or four carbon atoms. The second condenser is provided so that the second condenser is liquefied ethylene or ethane. The pump of the liquefied boil-off gas controls in the tank and although in dependence of a pressure obtaining in a condensate collector (18), where a controller (20) is provided so that the controller is prevented. A negative pressure appears within the tank system. The gas or liquefied gas is present at the first and/or second condenser. A compressor is provided for compressing the boil-off gas. A line is provided for introducing the liquefied boil-off gas in the tank in under circumvention of the pump. The condensate collector is provided for collecting the liquefied boil-off gas. A droplet separator is arranged between the tank and the compressors. A cooling device is arranged between the two compressors. Independent claims are included for: (1) a tanker; and (2) a method for storing a liquefied gas in a tank system.