| 摘要 |
The invention relates to a method for liquefying a hydrocarbon-rich flow, particularly a flow of natural gas, wherein liquefaction of the hydrocarbon-rich flow is carried out counter to a cascade consisting of two circuits of coolant mixtures. The first coolant mixture circuit is used for precooling (E1) and the second coolant mixture circuit is used for liquefaction and undercooling (E2) of the hydrocarbon-rich flow (a) that is to be liquefied. Each coolant mixture circuit comprises at least one single-stepped or multistepped condenser (V1,V2) which is driven by at least one gas turbine (G1, G2). Starters, which are used to assist the gas turbines, are associated with the gas turbines. According to the invention, the second coolant mixture circuit comprises a cold-suctioning condenser (V2) with a pressure ratio of at least 10 and the first coolant mixture circuit is at least partially used for intermediate cooling (E1) of at least one partial flow of the partially condensed coolant mixture flow (36, 39) of the second coolant mixture circuit. |
