METHOD AND DEVICE FOR REFILLING A STORAGE TANK

摘要

The present invention relates to a method and a device for refilling a stationary storage tank (1) with a subcooled cryogenically liquefied gas from a tanker (2), in particular with liquefied nitrogen (LIN). The method comprises the following steps: - a subcooler (3), comprising a cooling bath (4) and connected between the tanker (2) and an inlet (19) of the storage tank (1), is filled with the liquefied gas from the tanker (2) up to a filling level (5) and cooled to a bath temperature, - the storage tank (1) is subsequently refilled with the liquefied gas from the tanker (2) by the liquefied gas being pumped through a heat exchanger (7) in the cooling bath (4) of the subcooler (3) into the storage tank (1) by using a delivery pump (6), during which it is cooled to the bath temperature of the cooling bath (4), - wherein after the end of the filling process, the subcooler (3) is no longer supplied with liquefied gas and therefore heats up. The teaching according to the invention permits rapid refilling of a storage tank (1) by a tanker (2) by using a pump, so that an individual tanker (2) can fill a greater number of storage tanks per day. Tankers and their crew can therefore be used much more effectively. Moreover, pressure variations in the storage tank during the filling process can be reduced.