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    Method and system for air separation using a supplemental refrigeration cycle
    2.
    发明授权
    Method and system for air separation using a supplemental refrigeration cycle 有权
    使用补充制冷循环进行空气分离的方法和系统

    公开(公告)号：US09291388B2

    公开(公告)日：2016-03-22

    申请号：US13803195

    申请日：2013-03-14

    Applicant: Jeremiah J. Rauch ,  Andrew M. Warta ,  Hao Wu ,  David R. Parsnick ,  Sophia J. Dowd

    Inventor： Jeremiah J. Rauch ,  Andrew M. Warta ,  Hao Wu ,  David R. Parsnick ,  Sophia J. Dowd

    IPC: F25J3/00 ,  F25J3/04 ,  F25J1/02

    CPC classification number: F25J3/04412 ,  F25J1/0249 ,  F25J1/025 ,  F25J1/0251 ,  F25J1/0254 ,  F25J1/0255 ,  F25J3/0409 ,  F25J3/04187 ,  F25J3/042 ,  F25J3/04278 ,  F25J3/04296 ,  F25J3/04812 ,  F25J2245/40 ,  F25J2270/14 ,  F25J2270/40 ,  F25J2270/902

    Abstract: A system and method for air separation using a supplemental refrigeration cycle is provided. A portion of the refrigeration required by the air separation plant to produce a liquid product stream is supplied via a supplemental refrigeration circuit configured to direct a cooled refrigerant produced by the turboexpander through the main heat exchanger of the air separation plant. The refrigeration capacity is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus decreases the production of the liquid product stream. Adding refrigerant allows for an increase in the refrigeration imparted by the supplemental refrigeration circuit and thus allows for increased production of the liquid product stream.

    Abstract translation: 提供了一种使用补充制冷循环进行空气分离的系统和方法。 通过空气分离装置产生液体产物流所需的一部分制冷是通过补充制冷回路来供应的，所述补充制冷回路构造成将由涡轮膨胀机产生的冷却的制冷剂引导通过空气分离装置的主热交换器。 通过去除或添加补充制冷回路中的一部分制冷剂来控制制冷量，以调整入口压力，同时保持压缩机两端的基本恒定的体积流量和基本上恒定的压力比。 从补充制冷回路中除去制冷剂减少了补充制冷回路所产生的制冷量，从而减少了液体产物流的产生。 添加制冷剂允许增加由补充制冷回路产生的制冷，从而允许增加液体产物流的产生。

    Process to increase natural gas methane content
    7.
    发明授权
    Process to increase natural gas methane content 失效
    增加天然气甲烷含量的方法

    公开(公告)号：US5390499A

    公开(公告)日：1995-02-21

    申请号：US143924

    申请日：1993-10-27

    Applicant: George D. Rhoades ,  Robert J. Golueke

    Inventor： George D. Rhoades ,  Robert J. Golueke

    IPC: F25J1/02 ,  F25J1/00

    CPC classification number: F25J1/0045 ,  F25J1/0022 ,  F25J1/0221 ,  F25J1/0255 ,  F25J2205/02 ,  F25J2210/42 ,  F25J2220/64 ,  F25J2250/02

    Abstract: The present invention is directed to a process for purifying natural gas to provide a liquified natural gas product which is substantially pure methane. In the process, a natural gas feed stream is introduced into indirect countercurrent heat exchange in a first heat exchanger to cool the natural gas to below the dew point of ethane and higher hydrocarbons so as to separate the feed stream into a gas which is substantially pure methane and liquid which contains the ethane and higher hydrocarbons. The liquid/gas mixture is transferred to a separator where the gas occupies the head space of the separator and the liquid occupies the bottom of the separator. A gas fraction is removed from the top of the separator and is introduced into countercurrent heat exchange with liquid nitrogen in a second heat exchanger so as to liquefy the substantially pure methane gas. Liquid nitrogen is introduced into a third heat exchanger where the liquid nitrogen is mixed with a recycled portion of nitrogen vapor is mixed with a recycled portion of nitrogen vapor exiting from the second heat exchanger to provide a liquid nitrogen feed stream for the second heat exchanger.

    Abstract translation: 本发明涉及一种净化天然气以提供基本上纯的甲烷的液化天然气产物的方法。 在此过程中，将天然气进料流引入到第一热交换器中的间接逆流热交换器中，以将天然气冷却至低于乙烷和高级烃的露点，以将进料流分离成基本上纯的气体 含有乙烷和高级烃的甲烷和液体。 将液体/气体混合物转移到分离器，其中气体占据分离器的顶部空间，并且液体占据分离器的底部。 从分离器的顶部除去气体馏分，并在第二热交换器中引入与液氮的逆流热交换，以液化基本上纯的甲烷气体。 将液氮引入第三热交换器中，其中将液氮与氮蒸汽的再循环部分混合，并与从第二热交换器排出的再循环部分的氮蒸气混合，以提供用于第二热交换器的液氮进料流。

    LIQUEFACTION PROCESS FOR PRODUCING SUBCOOLED LNG
    9.
    发明申请
    LIQUEFACTION PROCESS FOR PRODUCING SUBCOOLED LNG 有权
    生产液化天然气的液化过程

    公开(公告)号：US20160282041A1

    公开(公告)日：2016-09-29

    申请号：US14670203

    申请日：2015-03-26

    Applicant: HANS E. KIMMEL

    Inventor： HANS E. KIMMEL

    IPC: F25J1/00 ,  F25J1/02

    CPC classification number: F25J1/0022 ,  F25J1/0042 ,  F25J1/0244 ,  F25J1/0255 ,  F25J1/0257 ,  F25J2210/42 ,  F25J2215/02 ,  F25J2220/62 ,  F25J2240/30

    Abstract: A variable speed liquid LNG expander (X1) and a variable speed two-phase LNG expander (X2) in line, downstream from X1. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X1 and expander X2 is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X2 is minimized.

    Abstract translation: 来自X1的下游的可变速液体LNG膨胀机（X1）和变速两相LNG膨胀机（X2）。 两个膨胀机的旋转速度可以彼此独立地控制和改变。 确定膨胀机X1和膨胀机X2的速度，使得与进料气体供应相比，PHS下游的液体LNG的量最大化，并且X2下游的蒸气和蒸发量最小化。

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