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    Nitrogen rejection from natural gas with CO.sub.2 and variable N.sub.2 content
    2.
    发明授权
    Nitrogen rejection from natural gas with CO.sub.2 and variable N.sub.2 content 失效
    天然气与二氧化碳排出氮气和N2含量不等

    公开(公告)号：US4451275A

    公开(公告)日：1984-05-29

    申请号：US382738

    申请日：1982-05-27

    申请人： Harvey L. Vines ,  Vincent Marano

    发明人： Harvey L. Vines ,  Vincent Marano

    IPC分类号： F25J3/02

    CPC分类号： F25J3/0257 ,  F25J3/0209 ,  F25J3/0233 ,  F25J2200/04 ,  F25J2200/40 ,  F25J2200/50 ,  F25J2200/72 ,  F25J2200/78 ,  F25J2205/04 ,  F25J2220/66 ,  F25J2240/12 ,  F25J2245/02 ,  F25J2270/04 ,  F25J2270/88 ,  F25J2280/40 ,  Y02C10/12 ,  Y10S62/927

    摘要： A process is described which uses a modified double distillation cycle for rejecting nitrogen from a natural gas stream containing varying amounts of nitrogen, methane, carbon dioxide and ethane-plus hydrocarbons. The natural gas stream is fractionally distilled in the high pressure distillation stage of the double distillation cycle to provide a nitrogen overhead and a bottoms comprising carbon dioxide and ethane-plus hydrocarbons. A sidestream consisting essentially of nitrogen and methane is withdrawn from the high pressure distillation stage as intermediate level feed to the low pressure distillation stage of the double distillation cycle. The nitrogen overhead from the high pressure stage is cooled by heat exchange with the methane bottoms of the low pressure stage which methane bottoms acquires an extra degree of refrigeration from a methane heat pump cycle to provide extra nitrogen reflux to thoroughly remove the carbon dioxide from the natural gas stream in the high pressure stage.

    摘要翻译： 描述了一种方法，其使用改进的双蒸馏循环来从含有不同量的氮，甲烷，二氧化碳和乙烷烃的天然气流中排除氮。 天然气流在双蒸馏循环的高压蒸馏阶段被分馏，以提供氮塔顶馏出物和包含二氧化碳和乙烷烃的塔底物。 基本上由氮和甲烷组成的侧流从高压蒸馏阶段排出，作为进入双蒸馏循环的低压蒸馏阶段的中间级进料。 通过与低压级的甲烷塔底部的热交换来冷却来自高压级的氮气塔架，甲烷塔底部从甲烷热泵循环中获得额外的制冷，以提供额外的氮气回流，从而将二氧化碳从 天然气流在高压阶段。

    Nitrogen rejection process incorporating a serpentine heat exchanger
    3.
    发明授权
    Nitrogen rejection process incorporating a serpentine heat exchanger 失效
    纳入蛇形热交换器的氮排除过程

    公开(公告)号：US4455158A

    公开(公告)日：1984-06-19

    申请号：US477561

    申请日：1983-03-21

    申请人： Harvey L. Vines ,  Miguel R. Alvarez ,  Howard C. Rowles ,  Donald W. Woodward

    发明人： Harvey L. Vines ,  Miguel R. Alvarez ,  Howard C. Rowles ,  Donald W. Woodward

    IPC分类号： F25J3/00 ,  F25J3/02 ,  F25J1/02

    CPC分类号： F25J3/0257 ,  F25J3/0209 ,  F25J3/0233 ,  F25J5/002 ,  F25J2200/06 ,  F25J2200/72 ,  F25J2200/78 ,  F25J2205/04 ,  F25J2220/64 ,  F25J2235/60 ,  F25J2240/12 ,  F25J2245/02 ,  F25J2270/04 ,  F25J2290/32 ,  Y10S62/927

    摘要： A method is disclosed for cooling a multicomponent gas stream containing variable amounts of the components by passing the gas stream through a heat exchange relationship with a fluid coolant stream so that carry-up of the condensed phase is maintained without condensed phase backmixing over the compositional range of the multicomponent gas stream. The gas stream is cooled by passing it through a cold-end up heat exchanger having a serpentine pathway for the multicomponent gas stream comprising a series of horizontal passes separated by horizontal dividers and alternatingly connected by turnaround passes at each end, the cross-sectional area of at least one horizontal pass nearer the cold-end being less than the cross-sectional area of a horizontal pass nearer the warm-end. The method is particularly applicable to cooling a natural gas feed stream having a variable nitrogen content in a nitrogen rejection process.

    摘要翻译： 公开了一种用于通过使气流通过与流体冷却剂流的热交换关系来冷却含有可变量的组分的多组分气流的方法，从而在组合范围内保持冷凝相的携带而不进行冷凝相回混 的多组分气流。 通过使气流通过具有用于多组分气流的蛇形通道的冷端向上热交换器来冷却气流，所述多组分气流包括由水平分隔器隔开的一系列水平通道，并且在每个端部通过周转通道交替地连接，横截面积 至少一个靠近冷端的水平通道小于靠近暖端的水平通道的横截面面积。 该方法特别适用于在氮气排除过程中冷却具有可变氮含量的天然气进料流。

    Nitrogen rejection from natural gas
    4.
    发明授权
    Nitrogen rejection from natural gas 失效
    天然气排氮

    公开(公告)号：US4411677A

    公开(公告)日：1983-10-25

    申请号：US376365

    申请日：1982-05-10

    申请人： James W. Pervier ,  Harvey L. Vines ,  Vincent Marano, III ,  Michael A. Patterson

    发明人： James W. Pervier ,  Harvey L. Vines ,  Vincent Marano, III ,  Michael A. Patterson

    IPC分类号： F25J3/02

    CPC分类号： F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J2200/02 ,  F25J2200/50 ,  F25J2200/72 ,  F25J2205/04 ,  F25J2210/06 ,  F25J2240/12 ,  F25J2270/04 ,  F25J2270/12 ,  F25J2270/60 ,  F25J2270/66 ,  Y10S62/927

    摘要： A process is disclosed for rejecting nitrogen from a natural gas feed containing nitrogen over a wide range of compositions, e.g. 5-85% nitrogen by volume, under elevated pressure using a single distillation column and a closed loop methane heat pump which reboils and refluxes the column. An intermediate reflux condenser is refrigerated by both the heat pump and overhead nitrogen fraction from the distillation column. The process can handle feeds with increasing nitrogen content and more than 100 ppmv carbon dioxide. The feed can be at pipeline pressure with the natural gas liquid components still present or at lower pressure with natural gas liquids removed. A mixed cryogenic refrigerant can be used in the heat pump as an alternative to methane. The process provides a high methane recovery over the entire feed range, and provides a nitrogen product stream having an elevated pressure suitable for recycling and reinjection to an oil or gas well to improve well head pressure.

    摘要翻译： 公开了一种用于在宽范围的组合物例如氮气中从氮气中排出氮气的方法。 使用单一蒸馏塔和闭环甲烷热泵在升高的压力下使体积为5-85％的氮气重沸并回流。 中间回流冷凝器由来自蒸馏塔的热泵和塔顶氮馏分两者冷却。 该方法可以处理含氮量增加和超过100 ppmv二氧化碳的饲料。 进料可以处于管道压力，天然气液体组分仍然存在或在较低压力下，天然气液体被去除。 混合的低温制冷剂可以用作热泵中的替代甲烷。 该方法在整个进料范围内提供高甲烷回收率，并且提供具有适于再循环和再注入油井或气井以提高井头压力的升高压力的氮产物料流。