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    DUAL NITROGEN EXPANSION PROCESS
    1.
    发明申请
    DUAL NITROGEN EXPANSION PROCESS 审中-公开
    双硝酸盐膨胀过程

    公开(公告)号：WO2009130466A2

    公开(公告)日：2009-10-29

    申请号：PCT/GB2009/001038

    申请日：2009-04-23

    申请人： STATOILHYDRO ASA ,  NEERAAS, Bengt, Olav ,  SANDVIK, Tor, Erling ,  JACKSON, Robert

    发明人： NEERAAS, Bengt, Olav ,  SANDVIK, Tor, Erling

    IPC分类号： F25J1/02

    CPC分类号： F25J1/0278 ,  F25J1/0022 ,  F25J1/005 ,  F25J1/0072 ,  F25J1/0204 ,  F25J1/0288 ,  F25J1/0294 ,  F25J2220/62 ,  F25J2270/16

    摘要： A method of natural gas liquefaction comprising first and second nitrogen refrigerant streams, each stream undergoing a cycle of compression, cooling, expansion and heating, during which the first nitrogen stream is expanded to a first, intermediate pressure and the second nitrogen stream is expanded to a second, lower pressure, and the heating occurs in one or more heat exchangers in which at least one of the expanded nitrogen streams is in heat exchanging relationship with natural gas, wherein, in at least one of said one or more heat exchangers, the first and second expanded nitrogen streams are in a heat exchanging relationship with the natural gas and both the first and second compressed nitrogen streams. The liquefaction can occur in three stages: in an initial stage the heated, expanded first nitrogen stream and the heated, expanded second nitrogen stream are used to cool the natural gas; in an intermediate stage the compressed first nitrogen stream is expanded to an intermediate pressure and used to cool the natural gas; and in a final stage the compressed, second nitrogen stream is expanded to a low pressure and used to cool the natural gas.

    摘要翻译： 一种天然气液化方法，包括第一和第二氮气制冷剂流，每个流经受压缩，冷却，膨胀和加热循环，在此期间，第一氮气流膨胀至第一中间压力，第二氮气流膨胀至 第二，较低的压力，并且加热发生在一个或多个热交换器中，其中至少一个膨胀的氮气流与天然气处于热交换关系，其中在所述一个或多个热交换器中的至少一个中， 第一和第二膨胀氮气流与天然气以及第一和第二压缩氮气流都处于热交换关系。 液化可以分三个阶段发生：在初始阶段，加热的，膨胀的第一氮气流和加热的，膨胀的第二氮气流用于冷却天然气; 在中间阶段，将压缩的第一氮气流扩展到中间压力并用于冷却天然气; 并且在最终阶段将压缩的第二氮气流扩展到低压并用于冷却天然气。

    DUAL NITROGEN EXPANSION PROCESS
    4.
    发明申请
    DUAL NITROGEN EXPANSION PROCESS 审中-公开
    双硝酸盐膨胀过程

    公开(公告)号：WO2009130466A3

    公开(公告)日：2013-09-12

    申请号：PCT/GB2009001038

    申请日：2009-04-23

    申请人： STATOIL ASA ,  NEERAAS BENGT OLAV ,  SANDVIK TOR ERLING ,  JACKSON ROBERT

    发明人： NEERAAS BENGT OLAV ,  SANDVIK TOR ERLING

    IPC分类号： F25J1/02 ,  F25J1/00

    CPC分类号： F25J1/0278 ,  F25J1/0022 ,  F25J1/005 ,  F25J1/0072 ,  F25J1/0204 ,  F25J1/0288 ,  F25J1/0294 ,  F25J2220/62 ,  F25J2270/16

    摘要： A method of natural gas liquefaction comprising first and second nitrogen refrigerant streams, each stream undergoing a cycle of compression, cooling, expansion and heating, during which the first nitrogen stream is expanded to a first, intermediate pressure and the second nitrogen stream is expanded to a second, lower pressure, and the heating occurs in one or more heat exchangers in which at least one of the expanded nitrogen streams is in heat exchanging relationship with natural gas, wherein, in at least one of said one or more heat exchangers, the first and second expanded nitrogen streams are in a heat exchanging relationship with the natural gas and both the first and second compressed nitrogen streams. The liquefaction can occur in three stages: in an initial stage the heated, expanded first nitrogen stream and the heated, expanded second nitrogen stream are used to cool the natural gas; in an intermediate stage the compressed first nitrogen stream is expanded to an intermediate pressure and used to cool the natural gas; and in a final stage the compressed, second nitrogen stream is expanded to a low pressure and used to cool the natural gas.

    摘要翻译： 一种天然气液化方法，包括第一和第二氮气制冷剂流，每个流经受压缩，冷却，膨胀和加热循环，在此期间，第一氮气流膨胀至第一中间压力，第二氮气流膨胀至 第二，较低的压力，并且加热发生在一个或多个热交换器中，其中至少一个膨胀的氮气流与天然气处于热交换关系，其中在所述一个或多个热交换器中的至少一个中， 第一和第二膨胀氮气流与天然气以及第一和第二压缩氮气流都处于热交换关系。 液化可以分三个阶段发生：在初始阶段，加热的，膨胀的第一氮气流和加热的，膨胀的第二氮气流用于冷却天然气; 在中间阶段，将压缩的第一氮气流扩展到中间压力并用于冷却天然气; 并且在最终阶段将压缩的第二氮气流扩展到低压并用于冷却天然气。