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    Natural gas liquefaction process
    1.
    发明专利
    Natural gas liquefaction process 未知

    公开(公告)号：AU2004274706A1

    公开(公告)日：2005-03-31

    申请号：AU2004274706

    申请日：2004-09-23

    Applicant: LINDE AG ,  STATOIL ASA

    Inventor： FRANKE HUBERT ,  PETTERSEN JOSTEIN ,  BOLT MANFRED ,  BAUER HEINZ ,  PAUROLA PENTTI ,  SCHIER MARC ,  SAPPER RAINER ,  FREDHEIM ARNE OLAV

    IPC: F25J1/02 ,  F25B1/10 ,  F25B5/02 ,  F25B9/00 ,  F25B9/02

    Abstract: A method of liquefying a hydrocarbon-rich gas, wherein the gas flows through a cascade of three refrigeration stages, each stage comprising a refrigerant circuit and a compressor, wherein at least part of the flow of refrigerant from the second circuit is used for the pre-cooling of the hydrocarbon rich gas in the first refrigeration stage. This balances the load on each of the compressors. By standardizing the drive units and compressors of the three coolant circuits, it is possible to maximize the attainable liquefaction capacity of the liquefaction process using tried-and-trusted drive units and compressors respectively. This method can be applied to mixed refrigerant cascades and circuits with a carbon dioxide pre-cooling circuit. This latter option has benefits for offshore use where large amounts of hydrocarbons are undesirable.

    Method for liquefying a stream rich in hydrocarbons
    2.
    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.

    Natural gas liquefaction process
    4.
    发明专利
    Natural gas liquefaction process 未知

    公开(公告)号：AU2004274706B2

    公开(公告)日：2008-08-07

    申请号：AU2004274706

    申请日：2004-09-23

    Applicant: LINDE AG ,  STATOIL ASA

    Inventor： FRANKE HUBERT ,  PETTERSEN JOSTEIN ,  BOLT MANFRED ,  BAUER HEINZ ,  PAUROLA PENTTI ,  SCHIER MARC ,  SAPPER RAINER ,  FREDHEIM ARNE OLAV

    IPC: F25B1/10 ,  F25B5/02 ,  F25B9/00 ,  F25J1/02

    Abstract: A method of liquefying a hydrocarbon-rich gas, wherein the gas flows through a cascade of three refrigeration stages, each stage comprising a refrigerant circuit and a compressor, wherein at least part of the flow of refrigerant from the second circuit is used for the pre-cooling of the hydrocarbon rich gas in the first refrigeration stage. This balances the load on each of the compressors. By standardizing the drive units and compressors of the three coolant circuits, it is possible to maximize the attainable liquefaction capacity of the liquefaction process using tried-and-trusted drive units and compressors respectively. This method can be applied to mixed refrigerant cascades and circuits with a carbon dioxide pre-cooling circuit. This latter option has benefits for offshore use where large amounts of hydrocarbons are undesirable.

    Method for liquefying a flow rich in hydrocarbons
    6.
    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.

    8.
    发明专利
    未知

    公开(公告)号：NO20061751L

    公开(公告)日：2006-06-22

    申请号：NO20061751

    申请日：2006-04-20

    Applicant: STATOIL ASA

    Inventor： PETTERSEN JOSTEIN ,  PAUROLA PENTTI ,  FREDHEIM ARNE OLAV ,  BAUER HEINZ ,  BOLT MANFRED ,  SAPPER RAINER ,  FRANKE HUBERT ,  SCHIER M

    IPC: F25B7/00 ,  F25B1/10 ,  F25B5/02 ,  F25B9/00 ,  F25J1/02

    Abstract: A method of liquefying a hydrocarbon-rich gas, wherein the gas flows through a cascade of three refrigeration stages, each stage comprising a refrigerant circuit and a compressor, wherein at least part of the flow of refrigerant from the second circuit is used for the pre-cooling of the hydrocarbon rich gas in the first refrigeration stage. This balances the load on each of the compressors. By standardizing the drive units and compressors of the three coolant circuits, it is possible to maximize the attainable liquefaction capacity of the liquefaction process using tried-and-trusted drive units and compressors respectively. This method can be applied to mixed refrigerant cascades and circuits with a carbon dioxide pre-cooling circuit. This latter option has benefits for offshore use where large amounts of hydrocarbons are undesirable.

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