Hybrid gas liquefaction cycle with multiple expanders
    1.
    发明授权
    Hybrid gas liquefaction cycle with multiple expanders 有权
    混合气体液化循环与多个膨胀机

    公开(公告)号:US07127914B2

    公开(公告)日:2006-10-31

    申请号:US10664336

    申请日:2003-09-17

    IPC分类号: F25J1/00 F25B7/00

    摘要: Method for gas liquefaction comprising cooling a feed gas by a first refrigeration system in a first heat exchange zone and withdrawing a substantially liquefied stream therefrom, further cooling the substantially liquefied stream by indirect heat exchange with one or more work-expanded refrigerant streams in a second heat exchange zone, and withdrawing therefrom a further cooled, substantially liquefied stream. At least one of the one or more work-expanded refrigerant streams is provided by compressing one or more refrigerant gases to provide a compressed refrigerant stream, cooling all or a portion of the compressed refrigerant stream in a third heat exchange zone to provide a cooled, compressed refrigerant stream, and work expanding the cooled, compressed refrigerant stream to provide one of the one or more work-expanded refrigerant streams. The flow rate of a work-expanded refrigerant stream in the second heat exchange zone typically is less than the total flow rate of one or more work-expanded refrigerant streams in the third heat exchange zone.

    摘要翻译: 用于气体液化的方法,包括通过第一热交换区域中的第一制冷系统冷却进料气体并从其中排出基本上液化的物流,通过在一秒钟内与一个或多个工作膨胀的制冷剂流间接热交换进一步冷却基本上液化的流 热交换区,并从其中抽出进一步冷却的基本上液化的物流。 一个或多个工作膨胀的制冷剂流中的至少一个通过压缩一个或多个制冷剂气体以提供压缩的制冷剂流来提供,在第三热交换区域中冷却压缩的制冷剂流的全部或一部分,以提供冷却的, 压缩的制冷剂流,并且对冷却的压缩的制冷剂流进行扩展,以提供一个或多个工作膨胀的制冷剂流中的一个。 第二热交换区中的工作膨胀的制冷剂流的流量通常小于第三热交换区中的一个或多个工作膨胀的制冷剂流的总流量。

    Nitrogen rejection from condensed natural gas
    3.
    发明授权
    Nitrogen rejection from condensed natural gas 失效
    冷凝天然气排氮

    公开(公告)号:US06978638B2

    公开(公告)日:2005-12-27

    申请号:US10444029

    申请日:2003-05-22

    IPC分类号: F25J3/08 F25J3/02 F25J3/00

    摘要: Method for the rejection of nitrogen from condensed natural gas which comprises (a) introducing the condensed natural gas into a distillation column at a first location therein, withdrawing a nitrogen-enriched overhead vapor stream from the distillation column, and withdrawing a purified liquefied natural gas stream from the bottom of the column; (b) introducing a cold reflux stream into the distillation column at a second location above the first location, wherein the refrigeration to provide the cold reflux stream is obtained by compressing and work expanding a refrigerant stream comprising nitrogen; and (c) either (1) cooling the purified liquefied natural gas stream or cooling the condensed natural gas stream or (2) cooling both the purified liquefied natural gas stream and the condensed natural gas stream, wherein refrigeration for (1) or (2) is obtained by compressing and work expanding the refrigerant stream comprising nitrogen. The refrigerant stream may comprise all or a portion of the nitrogen-rich vapor stream from the distillation column.

    摘要翻译: 从冷凝天然气中排除氮的方法,其包括:(a)在其第一位置将冷凝的天然气引入蒸馏塔,从蒸馏塔中取出富氮塔顶馏出物流,并将纯化的液化天然气 从塔的底部流出; (b)在第一位置上方的第二位置将冷的回流物流引入蒸馏塔,其中通过压缩和加工包含氮气的制冷剂流来获得冷回流物流; (c)(1)冷却纯化的液化天然气流或冷却冷凝的天然气流,或(2)冷却纯化的液化天然气流和冷凝的天然气流,其中(1)或(2 )通过压缩和加工包含氮气的制冷剂流而工作获得。 制冷剂流可以包括来自蒸馏塔的全部或一部分富氮蒸气流。