Process for sub-cooling an LNG stream obtained by cooling by means of a first refrigeration cycle, and associated installation
    22.
    发明授权
    Process for sub-cooling an LNG stream obtained by cooling by means of a first refrigeration cycle, and associated installation 有权
    通过第一制冷循环进行冷却而获得的LNG流的二次冷却以及相关的安装的方法

    公开(公告)号:US07552598B2

    公开(公告)日:2009-06-30

    申请号:US11399768

    申请日:2006-04-07

    Inventor: Henri Paradowski

    Abstract: In this process, the LNG stream is sub-cooled with a refrigerating fluid in a first heat exchanger. This refrigerating fluid undergoes a closed second refrigeration cycle which is independent of the first cycle. The closed cycle comprises a phase of heating the refrigerating fluid in a second heat exchanger, and a phase of compressing the refrigerating fluid in a compression apparatus to a pressure greater than its critical pressure. It further comprises a phase of cooling the refrigerating fluid originating from the compression apparatus in the second heat exchanger and a phase of dynamically expanding of a proportion of the refrigerating fluid issuing from the second heat exchanger in a turbine. The refrigerating fluid is formed by a mixture of nitrogen-containing fluids.

    Abstract translation: 在该过程中,LNG流在第一热交换器中用冷冻流体进行二次冷却。 这种制冷流体经历了与第一循环无关的封闭的第二制冷循环。 闭合循环包括在第二热交换器中加热制冷流体的阶段以及将压缩装置中的冷冻流体压缩至大于其临界压力的压力的相。 其还包括冷却来自第二热交换器中的压缩装置的冷冻流体的相,以及在涡轮机中从第二热交换器发出的一部分冷冻流体动态膨胀的阶段。 制冷流体由含氮流体的混合物形成。

    Method and installation for fractionating gas derived from pyrolysis of hydrocarbons
    23.
    发明授权
    Method and installation for fractionating gas derived from pyrolysis of hydrocarbons 有权
    用于分解来自烃类热解的气体的方法和装置

    公开(公告)号:US07185514B2

    公开(公告)日:2007-03-06

    申请号:US10487655

    申请日:2002-08-28

    Inventor: Henri Paradowski

    Abstract: The invention relates to a method for fractionating a gas produced by the pyrolysis of hydrocarbons (1) for the recovery of C2 and higher hydrocarbons, in particular ethylene and ethane, comprising an operation (70) for compressing and drying gas (1) as a result of it passing into a series of compressors (3, 10, 17, 24, 36), an operation (80) for progressively cooling and partially liquefying the gas produced by compression and drying operation (70) as a result of it successively passing into a cryogenic exchanger (62), and a distillation operation (90) in a column (64), and the corresponding installation.According to the invention, cryogenic exchanger (62) is cooled by at least one cooling liquid (400) which is liquid natural gas (LNG).

    Abstract translation: 本发明涉及一种用于分馏烃(1)的热分解产生的用于回收C 2 O 3和更高级烃,特别是乙烯和乙烷的气体的方法,其包括用于压缩的操作(70) 和干燥气体(1),其由于其进入一系列压缩机(3,10,17,24,36),用于逐渐冷却和部分液化由压缩和干燥操作产生的气体的操作(80)(70 ),其结果是它连续地进入低温交换器(62)和在列(64)中的蒸馏操作(90)和相应的装置。 根据本发明,低温交换器(62)由至少一种液体天然气(LNG)的冷却液(400)冷却。

    Method of and system for liquefying a gas with low boiling temperature
    27.
    发明授权
    Method of and system for liquefying a gas with low boiling temperature 失效
    液化低沸点气体的方法和系统

    公开(公告)号:US4339253A

    公开(公告)日:1982-07-13

    申请号:US214698

    申请日:1980-12-09

    Abstract: A process of and apparatus for liquefying a dry gas with low boiling point in a first circuit through heat exchange with a main refrigerating fluid in a second circuit itself pre-cooled to its at least partial liquefaction through heat exchange with an auxiliary refrigerating fluid in a third circuit, wherein, for a same amount of treated products, the required total compression input power for the refrigerating fluids is reduced by performing in said third circuit an intermediate condensation between the two last compression stages followed by a phase separation, the gaseous phase being compressed to a high pressure in the last compression stage whereas the liquid phase is compressed to a high pressure by a pump and recycled to a cryogenic heat exchanger for cooling the gas initially in the moist state thereby at least partially drying same.

    Abstract translation: 一种用于在第一回路中液化低沸点的干燥气体的方法和装置,其通过与第二回路中的主冷冻流体进行热交换,其本身通过与辅助冷冻流体的热交换进行热交换而预冷却至其部分液化 其中,对于相同量的处理产品,通过在所述第三回路中执行两个最后压缩级之间的相位分离之后的中间冷凝,然后进行相分离,所述冷却流体的所需总压缩输入功率被减小 在最后压缩阶段被压缩至高压,而液相通过泵压缩至高压,并再循环至低温热交换器,以最初在潮湿状态下冷却气体,从而至少部分干燥。

    Process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream, and associated installation
    29.
    发明授权
    Process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream, and associated installation 有权
    用于从天然气进料流生产过冷液化天然气流的方法以及相关的安装

    公开(公告)号:US09506690B2

    公开(公告)日:2016-11-29

    申请号:US12624587

    申请日:2009-11-24

    Abstract: A process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream. Passing a first natural gas feed stream through a first heat exchanger for precooling by heat exchange with a first stream of gaseous refrigerant produced in a first refrigeration cycle comprising a first dynamic expansion turbine. Passing the precooled feed stream through a second heat exchanger for liquefying by heat exchange with a second stream of gaseous refrigerant produced in a second refrigeration cycle comprising a second dynamic expansion turbine. Passing the liquefied natural gas stream through a third heat exchanger for subcooling the liquefied gas by heat exchange with a third refrigerant stream produced in a third refrigeration cycle comprising a third dynamic expansion turbine separate from the first turbine and the second turbine. An installation includes devices for conveying the natural gas stream, the heat exchangers and the turbines and compression devices cooling the refrigerants for the heat exchangers.

    Abstract translation: 一种从天然气进料流生产过冷液化天然气流的方法。 将第一天然气进料流通过第一热交换器进行预冷,通过与包括第一动态膨胀涡轮的第一制冷循环中产生的第一气态制冷剂流进行热交换。 使预冷的进料流通过第二热交换器以通过与在包括第二动态膨胀涡轮机的第二制冷循环中产生的第二气态制冷剂流进行热交换来液化。 使液化的天然气流通过第三热交换器,以通过与在第三制冷循环中产生的第三制冷剂流进行热交换来使液化气体过冷,所述第三制冷剂流包括与第一涡轮机和第二涡轮分离的第三动态膨胀涡轮机。 安装包括用于输送天然气流的装置,热交换器和涡轮机以及冷却用于热交换器的制冷剂的压缩装置。

    Method and device for liquefying a natural gas without phase separation
of the coolant mixtures
    30.
    发明授权
    Method and device for liquefying a natural gas without phase separation of the coolant mixtures 失效
    用于液化天然气而不相分离冷却剂混合物的方法和装置

    公开(公告)号:US6105389A

    公开(公告)日:2000-08-22

    申请号:US113517

    申请日:1998-07-10

    Abstract: A method allowing a gaseous mixture such as a natural gas to be liquefied by using a first compressed coolant mixture M.sub.1, at least partially condensed by cooling with the aid of an external coolant fluid, then subcooled, expanded, and vaporized, and a second compressed coolant mixture, cooled with the aid of an external coolant fluid, then cooled by heat exchange with the first coolant mixture M.sub.1 during the first cooling stage (I), after which it is in an at least partially condensed state. The second partially condensed coolant mixture is sent without phase separation to a second cooling stage (II) where it is fully condensed, expanded, and vaporized at at least two pressure levels. The subcooled natural gas is expanded to form the LNG produced.

    Abstract translation: 通过使用第一压缩冷却剂混合物M1使气态混合物(例如天然气)液化的方法通过外部冷却剂流体的冷却至少部分冷凝,然后被过冷,膨胀和蒸发,并且第二压缩 冷却剂混合物,借助于外部冷却剂流体冷却,然后在第一冷却阶段(I)期间通过与第一冷却剂混合物M1的热交换而冷却,之后其处于至少部分冷凝状态。 将第二部分冷凝的冷却剂混合物不经相分离送入第二冷却段(II),在第二冷却段(II)中,其在至少两个压力水平下完全冷凝,膨胀和蒸发。 过冷的天然气被膨胀以形成所生产的LNG。

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