Process and system for liquefying natural gas
    2.
    发明授权
    Process and system for liquefying natural gas 有权
    液化天然气的工艺和制度

    公开(公告)号:US06324867B1

    公开(公告)日:2001-12-04

    申请号:US09574940

    申请日:2000-05-18

    IPC分类号: F25J100

    摘要: A natural gas liquefaction system and process wherein excess refrigeration available in a typical natural gas liquefaction system is used to cool the inlet air to gas turbines in the system to thereby improve the overall efficiency of the system. A cooler is positioned in front of the air inlet of each gas turbine; and coolant (e.g. water) is flowed through each of the coolers to cool the ambient air as it flows into the gas turbines. The water, in turn, is cooled with propane taken from a refrigerant circuit in the system which, in turn, is used to initially cool the natural gas which is to be liquefied.

    摘要翻译: 一种天然气液化系统和方法,其中在典型的天然气液化系统中可用的过量制冷用于将入口空气冷却到系统中的燃气涡轮机,从而提高系统的整体效率。 冷却器位于每个燃气轮机的进气口前面; 并且冷却剂(例如水)流过每个冷却器,以便在环境空气流入燃气轮机时冷却环境空气。 水再次用从系统中的制冷剂回路取出的丙烷冷却,该制冷剂回路又用于初始冷却待液化的天然气。

    Method and apparatus for liquefaction of natural gas
    4.
    发明授权
    Method and apparatus for liquefaction of natural gas 失效
    天然气液化的方法和装置

    公开(公告)号:US5473900A

    公开(公告)日:1995-12-12

    申请号:US235775

    申请日:1994-04-29

    申请人: William R. Low

    发明人: William R. Low

    IPC分类号: F25J1/00 F25J1/02

    摘要: A process and apparatus for liquefying a natural gas, having a pressure above about 800 psig, in which the natural gas is introduced into an expander which operates to reduce the pressure of the natural gas and extract work from the expansion of the natural gas during the pressure reduction so that the resulting effluent from the expander can be cooled to sequentially lower temperatures by passing the gas through a plurality of cooling stages, in indirect heat exchange with at least one refrigerant, until the gas is substantially completely condensed in the last of the cooling stages.

    摘要翻译: 用于液化天然气的方法和装置,其具有高于约800psig的压力,其中将天然气引入膨胀器中,所述膨胀器用于降低天然气的压力并从天然气的膨胀中提取工作 通过使气体通过多个冷却段,与至少一个制冷剂进行间接热交换,直到气体在最后一个温度下基本上完全冷凝,从而将来自膨胀器的所得流出物冷却至依次降低温度 冷却阶段

    Apparatus for air separation
    9.
    发明授权
    Apparatus for air separation 有权
    空分设备

    公开(公告)号:US06295837B1

    公开(公告)日:2001-10-02

    申请号:US09577049

    申请日:2000-05-24

    申请人: Ryo Den Shinji Tomita

    发明人: Ryo Den Shinji Tomita

    IPC分类号: F25J100

    摘要: The object of the present invention is to separate air at low power cost to produce high-pressure nitrogen gas and oxygen gas by utilizing cold of liquefied natural gas. Feed air is pre-purified and then introduced into a cryogenic separation unit, so that oxygen gas and nitrogen gas are separated. The nitrogen gas separated in the cryogenic separation unit is introduced into a second heat exchanger, and cooled by indirect heat exchange with a refrigerant. The nitrogen gas thus cooled is compressed in a low-temperature nitrogen compressor and supplied through a heater to an external plant for consumption. LNG is introduced into a first heat exchanger as a cold source. In the first heat exchanger, LNG cools and liquefies the refrigerant by indirect heat exchange. The liquefied refrigerant is sent to the second heat exchanger. The refrigerant is vaporized by indirect heat exchange with the nitrogen gas in the second heat exchanger. The vaporized refrigerant is returned to the first heat exchanger.

    摘要翻译: 本发明的目的是以低功率成本分离空气,通过利用液化天然气的冷而产生高压氮气和氧气。 进料空气被预纯化,然后引入低温分离单元,以便分离出氧气和氮气。 在低温分离装置中分离的氮气被引入到第二热交换器中,并通过与制冷剂的间接热交换来冷却。 如此冷却的氮气在低温氮气压缩机中被压缩,并通过加热器供给外部设备进行消耗。 将LNG引入作为冷源的第一热交换器。 在第一个热交换器中,LNG通过间接热交换冷却和液化制冷剂。 液化制冷剂被送到第二热交换器。 制冷剂通过与第二热交换器中的氮气的间接热交换而蒸发。 蒸发的制冷剂返回到第一热交换器。

    Method for the liquefaction of a hydrocarbon-rich gas stream containing
aromatic and heavy hydrocarbons
    10.
    发明授权
    Method for the liquefaction of a hydrocarbon-rich gas stream containing aromatic and heavy hydrocarbons 失效
    液化含芳烃和重烃的富烃气流的方法

    公开(公告)号:US5979181A

    公开(公告)日:1999-11-09

    申请号:US869755

    申请日:1997-06-05

    申请人: Hans Schmidt

    发明人: Hans Schmidt

    IPC分类号: B01D53/00 F25J1/02 F25J1/00

    摘要: Method for the liquefaction of a hydrocarbon-rich gas stream containing aromatic and heavy hydrocarbons, in particular a natural gas stream, where, prior to the liquefaction, a separation of the aromatic and the heavy hydrocarbons, in particular the C.sub.5+ hydrocarbons, comprisesa) a fraction (9, 11, 14) containing heavy hydrocarbons is admixed to the hydrocarbon-rich gas stream (1) to be liquefied,b) this mixed fraction (1, 2) is supplied to a separator (D),c) a gas fraction (3) freed of aromatic and heavy hydrocarbons is withdrawn from separator (D) and liquefied (E2), andd) a liquid fraction (5) enriched with aromatic and heavy hydrocarbons is withdrawn from separator (D).

    摘要翻译: 液化含有芳族和重质烃,特别是天然气流的富烃气流的方法,其中在液化之前分离芳烃和重烃,特别是C5 +烃包括:a) 将含有重质烃的馏分(9,11,14)与富烃气流(1)混合以进行液化,b)将该混合馏分(1,2)供给到分离器(D)中,c) 从分离器(D)中排出不含芳烃和重烃的气体馏分(3),液化(E2),d)从分离器(D)中取出富含芳烃和重烃的液体馏分(5)。