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    Introgen rejection method
    2.
    发明授权
    Introgen rejection method 有权
    氮排除法

    公开(公告)号：US06609393B2

    公开(公告)日：2003-08-26

    申请号：US10142531

    申请日：2002-05-09

    Applicant: John Douglas Oakey

    Inventor： John Douglas Oakey

    IPC: F25J308

    CPC classification number: F25J3/0257 ,  C07C7/04 ,  F25J3/0209 ,  F25J3/0233 ,  F25J2200/06 ,  F25J2200/72 ,  F25J2200/78 ,  F25J2205/04 ,  F25J2230/60 ,  F25J2235/60 ,  F25J2240/40 ,  F25J2240/44 ,  F25J2245/42 ,  F25J2270/42 ,  F25J2280/02 ,  Y10S62/927 ,  C07C9/04

    Abstract: A method of forming a methane product by rejecting nitrogen from a feed gas stream comprising methane and nitrogen is disclosed. After being cooled in a main heat exchanger, the feed gas stream is rectified in a double rectification column comprising a higher pressure column and a lower pressure column. A gas flow is recycled from the lower pressure column to the higher pressure column. Part of the recycle flow is compressed in a compressor, cooled, liquefied in a condenser-reboiler and introduced into the higher pressure column. Another part of the recycle flow is also compressed in the compressor, cooled, liquefied in the main heat exchanger or by expansion, and introduced into the double rectification column in liquid state. At least part of the cooling of both parts of the recycle gas is performed in the main heat exchanger. A liquid methane product is withdrawn from the lower pressure column.

    Abstract translation: 公开了一种通过从包含甲烷和氮气的进料气流中排除氮而形成甲烷产物的方法。 在主热交换器中冷却后，进料气流在包括高压塔和低压塔的双精馏塔中精馏。 气流从低压塔再循环到高压塔。 回收流的一部分在压缩机中压缩，冷却，在冷凝器再沸器中液化并引入高压塔。 再循环流的另一部分也在压缩机中压缩，在主热交换器中冷却，液化，或通过膨胀，并以液态引入双精馏塔。 再循环气体的两部分的冷却的至少一部分在主热交换器中进行。 液体甲烷产物从低压塔中取出。

    High efficiency nitrogen rejection unit
    5.
    发明授权
    High efficiency nitrogen rejection unit 失效
    高效氮排除装置

    公开(公告)号：US5375422A

    公开(公告)日：1994-12-27

    申请号：US126412

    申请日：1993-09-27

    Applicant: Rayburn C. Butts

    Inventor： Rayburn C. Butts

    IPC: F25J3/00 ,  F25J3/02

    CPC classification number: F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J3/0285 ,  F25J3/029 ,  F25J5/002 ,  F25J2200/02 ,  F25J2200/50 ,  F25J2200/80 ,  F25J2270/02 ,  F25J2280/02 ,  Y10S62/905 ,  Y10S62/927

    Abstract: A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected variable flow rate therebetween. The plurality of separate streams are individually cooled by exchanging heat with a plurality of different process streams. The cooled streams are combined and expand into a separation column where nitrogen ascends the column and exits as a process stream while hydrocarbon descends the column to a reboiler thereof and exits as a process stream. The reboiler is used for cooling one of the separate streams. The hydrocarbon from the bottom of the column is expanded and used to cool a reflux condenser located inside the column and thereafter cools another of the streams before it is discharged from the process. The nitrogen process stream is used to cool another of the separated streams, and then is discharged from the process.

    Abstract translation: 通过将混合物分成多个单独的流分离并节流每个流的流以在其间实现选定的可变流速，从氮气和碳氢化合物的混合物中分离出氮和碳氢化合物的方法。 多个单独的流通过与多个不同的处理流交换热来单独冷却。 将冷却的流合并并膨胀成分离塔，其中氮气升高到塔并作为工艺流出口，同时烃将塔下降到其再沸器并作为工艺流出口。 再沸器用于冷却单独流中的一个。 来自塔底的烃被膨胀并用于冷却位于塔内的回流冷凝器，然后冷却另一个物流，然后从该方法中排出。 氮气流用于冷却另一个分离的物流，然后从该过程中排出。

    Nitrogen rejection unit
    6.
    发明授权
    Nitrogen rejection unit 失效
    排氮单元

    公开(公告)号：US5141544A

    公开(公告)日：1992-08-25

    申请号：US682287

    申请日：1991-04-09

    Applicant: Rayburn C. Butts

    Inventor： Rayburn C. Butts

    IPC: F25J3/00 ,  F25J3/02

    CPC classification number: F25J3/029 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J3/0285 ,  F25J2200/02 ,  F25J2200/80 ,  F25J2205/04 ,  F25J2210/06 ,  F25J2280/02 ,  Y10S62/927

    Abstract: A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected variable flow rate therebetween. The plurality of separate streams and individually cooled by exchanging heat with a plurality of different process streams, then the cooled separate streams are combined, cooled by another process stream, and again cooled by expansion. The cooled combined streams then enter a separation column where nitrogen ascends the column and exits as a process stream while hydrocarbon descends the column to a reboiler therof and exits as another process stream. The reboiler is used for cooling one of the separate streams and is therefore one of the process streams. The hydrocarbon from the column is expanded and used for the processe stream that first cools the combined streams and thereafter cools another of the separate streams and then is discharged from the process. The nitrogen process stream is expanded and used to cool another of the separate streams, and then is discharged from the process. The flow rates are controlled to maintain the throttling of the split streams and the pressure drop across the expansion valves within an optimum range of predetermined values.

    Abstract translation: 通过将混合物分成多个单独的流分离并节流每个流的流以在其间实现选定的可变流速，从氮气和碳氢化合物的混合物中分离出氮和碳氢化合物的方法。 多个单独的流并且通过与多个不同的工艺流交换热而单独冷却，然后将冷却的分离的流组合，由另一个工艺流冷却，并再次通过膨胀冷却。 冷却的组合物流然后进入分离塔，其中氮气升高到塔并作为工艺流出口，同时烃下降到再沸器基础上并作为另外的工艺流出口。 再沸器用于冷却单独流中的一个，因此是工艺流之一。 将来自塔的烃膨胀并用于首先冷却组合料流的工艺流，然后冷却另外的单独的料流，然后从该方法中排出。 氮气流被膨胀并用于冷却另一个分离的流，然后从该过程中排出。 控制流速以保持分流流的节流以及膨胀阀上的压降在预定值的最佳范围内。

    Method of heat exchange for variable-content nitrogen rejection units
    10.
    发明授权
    Method of heat exchange for variable-content nitrogen rejection units 失效
    可变含氮排氮装置的热交换方法

    公开(公告)号：US4721164A

    公开(公告)日：1988-01-26

    申请号：US904121

    申请日：1986-09-04

    Applicant: Donald W. Woodward

    Inventor： Donald W. Woodward

    IPC: F25J3/00 ,  F25J3/02 ,  E21B43/00 ,  E21B43/24

    CPC classification number: F25J3/0295 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J5/002 ,  F25J2220/66 ,  F25J2245/02 ,  F25J2280/02 ,  F25J2290/32 ,  Y10S62/903 ,  Y10S62/927 ,  Y10S62/929

    Abstract: The present invention relates to an improvement to a nitrogen or carbon dioxide rejection process used in an enhanced oil recovery project. In rejection processes for enhanced oil recovery projects at least a portion of a feed stream from the reservoir is precooled in a heat exchanger before distillation to separate the feed stream into a nitrogen or carbon dioxide fraction and a methane fraction. The improvement to this rejection process is the precooling of the feed stream by heat exchange with the nitrogen or carbon dioxide fraction and the methane fractions in a plate-fin heat exchanger with at least three circuits. In the heat exchanger, a first circuit is utilized as a nitrogen or carbon dioxide circuit to conduct all of the nitrogen or carbon dioxide coolant during the first part of the project life, and a minor portion of the total nitrogen or carbon dioxide coolant during the second and last part of the project life; a second circuit is utilized as a methane circuit to conduct a minor portion of the methane coolant during the first part of the project life, and all of the methane coolant during the second and last part of the project life, a third circuit is utilized as a common circuit to conduct the remaining major portion of the methane coolant during the first part of the project life, and the remaining major portion of the nitrogen or carbon dioxide coolant during the second and last part of the project life. Switching from methane coolant to nitrogen or carbon dioxide coolant in the third circuit is done when the nitrogen or carbon dioxide coolant flow exceeds the methane coolant flow.

    Abstract translation: 本发明涉及用于增强采油项目中的氮或二氧化碳排放过程的改进。 在用于增强采油项目的排除过程中，在蒸馏之前，在热交换器中将来自储层的至少一部分进料流预冷却，以将进料流分离成氮气或二氧化碳馏分和甲烷馏分。 对该排除方法的改进是通过与具有至少三个回路的板翅式热交换器中的氮气或二氧化碳馏分和甲烷馏分进行热交换来进料物流的预冷却。 在热交换器中，使用第一回路作为氮气或二氧化碳回路，以在项目寿命的第一部分期间导入所有的氮气或二氧化碳冷却剂，并且在该期间的总氮或二氧化碳冷却剂的一小部分 项目生命的第二和最后一部分; 第二回路被用作甲烷回路，以在项目寿命的第一部分期间导入甲烷冷却剂的一小部分，并且在项目寿命的第二和最后部分期间所有的甲烷冷却剂，第三回路被用作 在项目寿命的第一部分期间进行甲烷冷却剂的剩余主要部分的通用电路，以及在项目寿命的第二个和最后一个部分的剩余的大部分氮或二氧化碳冷却剂。 当氮气或二氧化碳冷却剂流量超过甲烷冷却剂流量时，在第三回路中从甲烷冷却剂切换到氮气或二氧化碳冷却剂。

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