| 摘要 |
A method for liquefying a hydrocarbon-rich fraction is described, wherein the cooling and liquefaction of the hydrocarbon-rich fraction is implemented by indirect heat exchange with the refrigerant mixture of a refrigerant mixture circuit, the refrigerant mixture is compressed at least in a two-stage manner and is separated into a gaseous and a liquid fraction after each compression stage, wherein the gaseous fraction of the final compression stage is cooled to the lowest temperature level, while the liquid fraction of the intermediate compression stages or at least one of the intermediate compression stages is cooled to a temperature level lying above the lowest temperature level. According to the invention, the liquid fraction (3), which is cooled to a temperature level lying above the lowest temperature level, is cooled (E3) prior to the indirect heat exchange (E) with the hydrocarbon-rich fraction (20) to be liquefied. |
