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    Cryogenic process for the separation of air to produce moderate pressure nitrogen
    11.
    发明授权
    Cryogenic process for the separation of air to produce moderate pressure nitrogen 失效
    用于分离空气以产生中等压力氮的低温工艺

    公开(公告)号：US5129932A

    公开(公告)日：1992-07-14

    申请号：US785596

    申请日：1991-10-30

    申请人： Rakesh Agrawal ,  Donald W. Woodward

    发明人： Rakesh Agrawal ,  Donald W. Woodward

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04315 ,  F25J3/04212 ,  F25J3/04309 ,  F25J3/04321 ,  F25J3/04412 ,  F25J3/04678 ,  F25J2200/20 ,  F25J2240/44 ,  F25J2245/50 ,  F25J2250/42 ,  F25J2250/50

    摘要： This invention relates to a cryogenic process for the separation of air utilizing an integrated multi-column distillation system wherein a nitrogen rich, oxygen rich and argon rich product are generated. In the cryogenic distillation separation of air, air is initially compressed, pretreated and cooled for separation into its components. Moderate pressure, e.g., 25-80 psia nitrogen is generated with enhanced nitrogen product purity and greater recovery of both nitrogen and argon by effecting a high boil-up rate in the bottom of the lower pressure column, thereby creating a reduced liquid flow/vapor flow ratio (L/V) and utilizing a higher than customary nitrogen reflux to the top of the lower pressure column, where the concentration of oxygen in nitrogen is less than about 10 ppm by volume or the nitrogen purity is at least about 99.5% by volume.Refrigeration to drive the system is obtained by recovering the energy from the waste nitrogen stream and oxygen vapor from the lower pressure column.A second method for obtaining refrigeration is to withdraw oxygen as a bottoms liquid from the lower pressure column, expanding that liquid to a lower pressure and using it to condense the nitrogen vapor generated in a higher pressure column which has been expanded in a turbo-expander to provide the refrigeration.

    摘要翻译： 本发明涉及一种利用集成的多塔蒸馏系统分离空气的低温方法，其中产生富氮富含富氩产物。 在空气的低温蒸馏分离中，空气最初被压缩，预处理并冷却以分离成其组分。 通过在低压塔的底部实现高沸腾速率，产生中等压力，例如氮气产生纯度提高，氮气和氩气回收率更高，从而产生较低的液体/蒸气 流量比（L / V），并利用比常规氮回流高于低压塔的顶部，其中氮中的氧浓度小于约10ppm体积或氮纯度至少约99.5％ 卷。 通过从废氮气流中回收能量和从低压塔中回收氧气来获得驱动系统的制冷。 用于获得制冷的第二种方法是从低压塔中抽出作为底部液体的氧气，将该液体膨胀到较低的压力，并将其用于冷凝在涡轮膨胀机中膨胀的较高压力塔中产生的氮蒸汽 提供制冷。

    Enhanced recovery of argon from cryogenic air separation cycles
    12.
    发明授权
    Enhanced recovery of argon from cryogenic air separation cycles 失效
    从低温空气分离循环中增强阿尔贡的恢复

    公开(公告)号：US5114449A

    公开(公告)日：1992-05-19

    申请号：US573952

    申请日：1990-08-28

    申请人： Rakesh Agrawal ,  Donald W. Woodward

    发明人： Rakesh Agrawal ,  Donald W. Woodward

    IPC分类号： C01B23/00 ,  F25J3/04

    CPC分类号： F25J3/04672 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/0469 ,  F25J2200/54 ,  F25J2200/90 ,  F25J2205/02 ,  F25J2235/58 ,  F25J2290/10 ,  Y10S62/924 ,  Y10S62/939

    摘要： The present invention relates to an improvement for the production of argon from cryogenic air separation processes. In particular, the improvement provides a better method of thermally linking the top of the crude argon column with the low pressure column. In the improvement, the argon-rich, overhead vapor from the top of the crude argon column is condensed in a boiler/condenser by indirect heat exchange against liquid descending the low pressure column; a portion of the condensed argon-rich, overhead vapor is returned to the top of the crude argon column to provide reflux. The most suitable location for such boiler/condenser is as an intermediate boiler/condenser in the low pressure column, particularly, the section of the low pressure column bounded by the feed point of the crude liquid oxygen from the bottom of the high pressure column and the vapor feed draw line for the crude argon column wherein an adequate temperature difference exists between the descending liquid and the condensing argon.

    Air separation process for the production of oxygen-rich and nitrogen-rich products
    14.
    发明授权
    Air separation process for the production of oxygen-rich and nitrogen-rich products 失效
    空气分离过程生产富氧和富氮产品

    公开(公告)号：US4936099A

    公开(公告)日：1990-06-26

    申请号：US354173

    申请日：1989-05-19

    申请人： Donald W. Woodward ,  Rakesh Agrawal

    发明人： Donald W. Woodward ,  Rakesh Agrawal

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04103 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04284 ,  F25J3/04418 ,  F25J3/0486 ,  F25J2200/54 ,  F25J2205/02 ,  F25J2235/52 ,  F25J2250/20 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2250/52

    摘要： The present invention is an improvement to a two distillation column, cryogenic air separation process which produces nitrogen-rich and oxygen-rich products. The improvement to the process is condensing at least a portion of the nitrogen overhead from the high pressure column in a reboiler/condenser against a crude liquid oxygen stream and in an intermediate reboiler/condenser located in the low pressure column against internal low pressure column streams. The condensed nitrogen overhead is fed either to the low pressure or high pressure columns as reflux. The vaporized portion of the crude liquid oxygen stream is work expanded to provide some or all of the refrigeration required for the process.

    摘要翻译： 本发明是对两个蒸馏塔，低温空气分离方法的改进，其产生富氮和富氧产物。 该方法的改进是将再沸器/冷凝器中的来自高压塔的氮塔顶馏出物的至少一部分与粗液氧流和位于低压塔中的中间再沸器/冷凝器相对于内部低压塔流 。 冷凝的氮气塔顶作为回流进料到低压塔或高压塔。 粗液氧气流的蒸发部分工作膨胀以提供该方法所需的部分或全部制冷。

    Method of heat exchange for variable-content nitrogen rejection units
    15.
    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

    申请人： Donald W. Woodward

    发明人： Donald W. Woodward

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

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

    摘要： 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.

    摘要翻译： 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。

    Dual dephlegmator process to separate and purify syngas mixtures
    16.
    发明授权
    Dual dephlegmator process to separate and purify syngas mixtures 失效
    双分馏工艺分离纯化合成气混合物

    公开(公告)号：US4525187A

    公开(公告)日：1985-06-25

    申请号：US579845

    申请日：1984-07-12

    申请人： Donald W. Woodward ,  Arthur T. Katsaros ,  Howard C. Rowles

    发明人： Donald W. Woodward ,  Arthur T. Katsaros ,  Howard C. Rowles

    IPC分类号： C07C7/09 ,  F25J3/02

    CPC分类号： C07C7/09 ,  F25J3/0223 ,  F25J3/0233 ,  F25J3/0271 ,  F25J2200/70 ,  F25J2200/74 ,  F25J2200/80 ,  Y10S62/92 ,  Y10S62/929

    摘要： The present invention involves a process for separating and purifying gas mixtures comprising H.sub.2, CO and C.sub.1 + hydrocarbons. The gas is initially cooled in a high pressure dephlegmator to condense and rectify the C.sub.1 + hydrocarbons leaving a combined H.sub.2 --CO vapor. The condensed C.sub.1 + hydrocarbons are partially vaporized and subsequently recondensed in a second, low pressure dephlegmator with further rectification. This process yields H.sub.2 --CO vapor streams and a C.sub.1 + liquid hydrocarbon product at purities suitable for subsequent commercial operations.

    摘要翻译： 本发明涉及一种用于分离和纯化包含H 2，CO和C 1 +烃的气体混合物的方法。 气体最初在高压分凝器中冷却，以冷凝和整流C1 +烃，离开组合的H2-CO蒸汽。 冷凝的C1 +烃部分蒸发，随后在第二个低压分馏器中重新冷凝，进一步精馏。 该方法产生的H2-CO蒸汽流和C1 +液态烃产品的纯度适合于随后的商业操作。

    Elevated pressure air separation unit for remote gas process
    17.
    发明授权
    Elevated pressure air separation unit for remote gas process 失效
    用于远程气体处理的高压空气分离单元

    公开(公告)号：US5635541A

    公开(公告)日：1997-06-03

    申请号：US489398

    申请日：1995-06-12

    申请人： Arthur R. Smith ,  John L. Dillon, IV ,  Donald W. Woodward

    发明人： Arthur R. Smith ,  John L. Dillon, IV ,  Donald W. Woodward

    IPC分类号： C01B3/36 ,  C01B13/02 ,  C01B21/04 ,  C07C1/04 ,  C07C2/82 ,  F25J3/04 ,  C07C27/06

    CPC分类号： C01B21/0433 ,  C01B13/0248 ,  C01B3/36 ,  C07C1/0485 ,  C07C2/82 ,  F25J3/04018 ,  F25J3/04036 ,  F25J3/0409 ,  F25J3/04121 ,  F25J3/04539 ,  F25J3/04563 ,  F25J3/04581 ,  F25J3/04612 ,  C01B2210/0046 ,  F25J2200/20 ,  F25J2205/34 ,  F25J2260/44

    摘要： The present invention is an improvement to a process for the conversion of natural gas to produce higher molecular weight hydrocarbon products, wherein the natural gas is partially oxidized to produce a synthesis gas comprising carbon monoxide and hydrogen, wherein the synthesis gas is catalytically reacted to produce the higher molecular weight hydrocarbon products, wherein the conversion process generates excess steam and wherein oxygen used to partially oxidize the natural gas is produced by an air separation process. The improvement is characterized by operating such air separation process at an elevated pressure so that the feed air to the air separation process is compressed to between 8 and 20 Bar(a); expanding at least a portion of the excess steam generated by the conversion process to generate work and using at least a portion of the generated work to drive the compression requirements of the air separation process.

    摘要翻译： 本发明是对天然气转化生产较高分子量烃产物的方法的改进，其中天然气被部分氧化以产生包含一氧化碳和氢的合成气，其中合成气被催化反应以产生 较高分子量的烃产物，其中转化过程产生过量的蒸汽，并且其中用于部分氧化天然气的氧气通过空气分离过程产生。 改进的特征在于在升高的压力下操作这种空气分离过程，使得空气分离过程的进料空气被压缩至8至20巴（a）; 膨胀由转化过程产生的过量蒸汽的至少一部分以产生工作并且使用至少一部分所产生的工件来驱动空气分离过程的压缩要求。

    Nitrogen rejection process incorporating a serpentine heat exchanger
    19.
    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。