Method of Separating Off Nitrogen from Liquefied Natural Gas
    3.
    发明申请
    Method of Separating Off Nitrogen from Liquefied Natural Gas 审中-公开
    从液化天然气中分离氮的方法

    公开(公告)号:US20100275646A1

    公开(公告)日:2010-11-04

    申请号:US12528884

    申请日:2008-02-19

    IPC分类号: F25J3/00

    摘要: A method of separating off an N2-rich fraction from a liquefied hydrocarbon-rich fraction is described, in particular from liquefied natural gas, wherein the liquefied hydrocarbon-rich fraction, after its liquefaction and subcooling, is fed to a stripping column which serves for separating off the N2-rich fraction.According to the invention, a first substream of the liquefied hydrocarbon-rich fraction (2, 2′) is applied to the stripping column (S) as reflux, whereas a second substream of the liquefied hydrocarbon-rich fraction (3, 3′) is fed to the bottom of the stripping column (S), wherein the second substream of the liquefied hydrocarbon-rich fraction (3, 3′) has a higher temperature than the first substream of the liquefied hydrocarbon-rich fraction (2, 2′).

    摘要翻译: 特别是从液化的天然气中分离出富液化部分的富N2级分的方法,其中将液化和过冷却后的液化富烃部分进料到用于 分离富N2级分。 根据本发明,将液化富烃馏分(2,2')的第一子流作为回流施加到汽提塔(S),而液化富烃馏分(3,3')的第二子流 进料到汽提塔(S)的底部,其中液化富烃馏分(3,3')的第二子流具有比液化的富烃馏分(2,2')的第一子流更高的温度, )。

    METHOD AND APPARATUS FOR SEPARATING A FRACTION RICH IN C2+ FROM LIQUEFIED NATURAL GAS
    4.
    发明申请
    METHOD AND APPARATUS FOR SEPARATING A FRACTION RICH IN C2+ FROM LIQUEFIED NATURAL GAS 审中-公开
    从液化天然气中分离C2 +中丰富的分离方法和装置

    公开(公告)号:US20090211296A1

    公开(公告)日:2009-08-27

    申请号:US11813278

    申请日:2005-12-21

    IPC分类号: F25J3/02

    摘要: A process and apparatus for separating a fraction rich in C2+ from liquefied natural gas (LNG) is disclosed. In an embodiment, partial evaporation of the liquefied natural gas occurs in a heat exchanger. The partially evaporated natural gas is separated into a first gas fraction rich in C1 and a first liquid fraction rich in C2+. In a separation column, rectification separation of the first liquid fraction rich in C2+ into a second gas fraction rich in C1 and a second liquid fraction rich in C2+ occurs. The first gas fraction rich in C1 is re-liquefied in the heat exchanger. At least one sub-stream of the re-liquefied gas fraction rich in C1 is fed as a reflux to the rectification separation.

    摘要翻译: 公开了一种用于将富含C2 +的馏分与液化天然气(LNG)分离的方法和装置。 在一个实施例中,液化天然气的部分蒸发发生在热交换器中。 将部分蒸发的天然气分离成富含C1的第一气体馏分和富含C2 +的第一液体馏分。 在分离塔中,发生富含C2 +的第一液体馏分到富含C1的第二气体馏分和富含C2 +的第二液体馏分的精馏分离。 富含C1的第一气体馏分在热交换器中再液化。 将富含C1的再液化气体馏分的至少一个子流作为回流进料至精馏分离。