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    Method for liquefying a stream rich in hydrocarbons
    1.
    发明专利
    Method for liquefying a stream rich in hydrocarbons 未知

    公开(公告)号：AU7643698A

    公开(公告)日：1998-11-13

    申请号：AU7643698

    申请日：1998-04-15

    Applicant: LINDE AG ,  STATOIL ASA

    Inventor： STOCKMANN RUDOLF ,  FORG WOLFGANG ,  BOLT MANFRED ,  STEINBAUER MANFRED ,  PFEIFFER CHRISTIAN ,  PAUROLA PENTTI ,  FREDHEIM ARNE OLAV ,  SORENSEN OYSTEIN

    IPC: F25J1/02 ,  F25J3/02

    Abstract: The invention relates to a method for liquefying a stream rich in hydrocarbons, especially a stream of natural gas, by the indirect exchange of heat with the refrigerants in a closed-circuit cascade of mixed refrigerants. According to the invention, said closed-circuit cascade of mixed refrigerants consists of at least 3 circuits of mixed refrigerants, with each circuit comprising different refrigerants. The first of the three mixed refrigerant circuits is used for pre-cooling (E1), the second for liquefying E2), and the third for super-cooling (E3) the hydrocarbon-rich stream (1) to be liquefied. The method provided for in the invention reduces specific energy consumption and investment costs since the three circuits of mixed refrigerants are or can be optimally adjusted to the enthalpy temperature curves of the hydrocarbon-rich stream to be liquefied and the refrigerant mixtures.

    6.
    发明专利
    未知

    公开(公告)号：DE10206388A1

    公开(公告)日：2003-08-28

    申请号：DE10206388

    申请日：2002-02-15

    Applicant: LINDE AG ,  STATOIL ASA STAVANGER

    Inventor： STOCKMANN RUDOLF ,  PRIETZEL WERNER ,  PAUROLA PENTTI

    IPC: F25J1/02 ,  F25J3/08 ,  F25J3/06

    Abstract: A process is described for liquefaction of a hydrocarbon-rich stream, especially a natural gas stream, at least indirect heat exchange taking place between the hydrocarbon-rich stream to be liquefied and the refrigerant mixture of at least one refrigerant mixture circuit, and the refrigerant mixture being separated after completed supercooling into a gaseous fraction and a liquid fraction and these fractions being recombined before and/or during the reheating of the refrigerant mixture. According to the invention, a gas fraction ( 9 ) that is identical or similar in composition is added at least from time to time to the gas fraction ( 4 ) that has been obtained in the separation (D). In doing so, the addition of the gas fraction ( 9 ) that is identical or similar in composition takes place when a minimum amount of the gas fraction ( 4 ) obtained in the separation (D) of the refrigerant mixture is not reached.

    Method for liquefying a flow rich in hydrocarbons
    7.
    发明专利
    Method for liquefying a flow rich in hydrocarbons 未知

    公开(公告)号：AU8106798A

    公开(公告)日：1998-12-30

    申请号：AU8106798

    申请日：1998-05-27

    Applicant: LINDE AG ,  STATOIL ASA

    Inventor： STOCKMANN RUDOLF ,  BOLT MANFRED ,  STEINBAUER MANFRED ,  PFEIFFER CHRISTIAN ,  PAUROLA PENTTI ,  FORG WOLFGANG ,  FREDHEIM ARNE OLAV ,  SORENSEN OYSTEIN

    IPC: C09K5/04 ,  F25B9/00 ,  F25J1/02 ,  F25J3/06

    Abstract: In the liquefaction of a hydrocarbon by indirect heat exchange with the refrigerant mixture of a refrigerant mixture cycle, the refrigerant mixture being compressed in multiple stages, the compressed refrigerant mixture (23) is at least partially condensed (E4) downstream of the penultimate compressor stage and is fractionated (D4) into a higher-boiling liquid fraction (26) and a lower-boiling gas fraction (24). The lower-boiling gas fraction (24) is compressed to the final pressure, partially condensed (E5) and fractionated (D5) into a lower-boiling gas fraction (10) and a higher-boiling liquid fraction (27). The higher-boiling liquid fraction (27) is added to the partially condensed refrigerant mixture stream (23), and the gas fraction (10) forms the lower-boiling refrigerant mixture fraction and the liquid fraction (26) forms the higher boiling refrigerant mixture fraction of the refrigerant mixture cycle. Alternatively, the compressed refrigerant mixture (20, 31, 34) can be partially condensed (E3, E4, E5) after each compressor stage and fractionated in each case into a lower-boiling gas fraction (21, 32, 10) and a higher-boiling liquid fraction (30, 33, 35). Only the gas fraction (21, 32) from the partial condensation (E3, E4) in each case is further compressed and the liquid fractions (33, 35) from the second fractionation (D4, D5) are added to the partially condensed stream (20) from the first compressor stage upstream of its fractionation (D3). The gas fraction (10) from the final fractionation (D5) forms the lower-boiling refrigerant mixture fraction and the liquid fraction (30) from the first fractionation (D3) forms the higher-boiling refrigerant mixture fraction of the refrigerant mixture cycle.

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