Liquefying hydrocarbon-rich fraction, comprises cooling and liquefying the hydrocarbon-rich fraction in indirect heat exchange with refrigeration circuits, which contain a dry-running gas seal

摘要

Method for liquefying hydrocarbon-rich fraction, comprises: cooling and liquefying the hydrocarbon-rich fraction in indirect heat exchange with one or more refrigeration circuits, where: the refrigeration circuits or compressors contain at least dry-running gas seal; a seal gas is supplied during the standby operation of the liquefaction process; and before or during the standby operation, a freezing agent separated from the refrigeration circuits or compressors is condensed.