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    Process and apparatus for the cryogenic separation of air
    1.
    发明授权
    Process and apparatus for the cryogenic separation of air 失效
    空气低温分离的方法和装置

    公开(公告)号：US06662593B1

    公开(公告)日：2003-12-16

    申请号：US10317593

    申请日：2002-12-12

    申请人： Paul Higginbotham ,  Rakesh Agrawal ,  Adam Adrian Brostow ,  Kelvin Graham Hayes ,  Donn Michael Herron ,  Declan Patrick O'Connor

    发明人： Paul Higginbotham ,  Rakesh Agrawal ,  Adam Adrian Brostow ,  Kelvin Graham Hayes ,  Donn Michael Herron ,  Declan Patrick O'Connor

    IPC分类号： F25J304

    CPC分类号： F25J3/04745 ,  F25J3/0409 ,  F25J3/04412 ,  F25J2200/32 ,  F25J2200/34 ,  F25J2200/90 ,  Y10S62/925

    摘要： Liquid oxygen (“LOX”) product and a krypton- and xenon-enriched liquid product is produced from the cryogenic separation of air using a cryogenic distillation system. The process comprises separating feed air in the main distillation system into nitrogen-rich overhead vapor and said krypton- and xenon-enriched liquid product. At least a portion of said krypton- and xenon-enriched liquid product is removed from the main distillation system for further distillation, to produce at least one krypton- and/or xenon-rich product. Xenon-lean liquid is fed to the first additional distillation column and separated into oxygen-rich overhead vapor and said LOX product having a concentration of xenon less than that in said feed air. The xenon-lean liquid is usually also lean in krypton.

    摘要翻译： 使用低温蒸馏系统从空气的低温分离产生液氧（“LOX”）产物和富含氪和氙的液体产物。 该方法包括将主蒸馏系统中的进料空气分离成富氮塔顶蒸气和所述氪和氙浓缩液体产物。 将所述氪和氙浓缩液体产物的至少一部分从主蒸馏系统中除去以进一步蒸馏，以产生至少一种氪和/或氙浓缩产物。 将贫氙液体进料到第一另外的蒸馏塔并分离成富氧塔顶蒸气，并且所述LOX产物的氙浓度小于所述进料空气中的浓度。 氙气稀薄的液体通常也倚在氪气中。

    Process for nitrogen liquefaction
    2.
    发明授权
    Process for nitrogen liquefaction 失效
    氮液化过程

    公开(公告)号：US06298688B1

    公开(公告)日：2001-10-09

    申请号：US09415996

    申请日：1999-10-12

    申请人： Adam Adrian Brostow ,  Rakesh Agrawal ,  Donn Michael Herron ,  Mark Julian Roberts

    发明人： Adam Adrian Brostow ,  Rakesh Agrawal ,  Donn Michael Herron ,  Mark Julian Roberts

    IPC分类号： F25J300

    CPC分类号： F25J1/0037 ,  F25J1/0012 ,  F25J1/0015 ,  F25J1/004 ,  F25J1/0052 ,  F25J1/0055 ,  F25J1/0219 ,  F25J1/0282 ,  F25J1/0283 ,  F25J1/0284 ,  F25J1/0285 ,  F25J1/0288 ,  F25J1/0291 ,  F25J2230/20 ,  F25J2230/30

    摘要： A process for gas liquefaction, particularly nitrogen liquefaction, which combines the use of a nitrogen autorefrigeration cooling cycle with one or more closed-loop refrigeration cycles using two or more refrigerant components. The closed-loop refrigeration cycle or cycles provide refrigeration in a temperature range having a lowest temperature between about −125° F. and about −250° F. A nitrogen expander cycle provides additional refrigeration, a portion of which is provided at temperatures below the lowest temperature of the closed-loop or recirculating refrigeration cycle or cycles. The lowest temperature of the nitrogen expander cycle refrigeration range is between about −220° F. and about −320° F. The combined use of the two different refrigerant systems allows each system to operate most efficiently in the optimum temperature range, thereby reducing the power consumption required for liquefaction.

    摘要翻译： 一种用于气体液化，特别是氮液化的方法，其结合了使用两个或多个制冷剂组分的氮自动制冷冷却循环与一个或多个闭环制冷循环的使用。 闭环制冷循环或循环在具有约-125°F至约-22°F之间的最低温度的温度范围内提供制冷。氮气扩张器循环提供额外的制冷，其一部分在低于 闭环或循环制冷循环的最低温度或循环。 氮气膨胀机循环制冷范围的最低温度为约-220°F至约-320°F。两种不同制冷剂系统的组合使用允许每个系统在最佳温度范围内最有效地运行，从而减少 液化所需的功耗。

    Process for the production of intermediate pressure oxygen
    3.
    发明授权
    Process for the production of intermediate pressure oxygen 失效
    中压氧生产工艺

    公开(公告)号：US06253576B1

    公开(公告)日：2001-07-03

    申请号：US09437917

    申请日：1999-11-09

    申请人： Donn Michael Herron ,  Adam Adrian Brostow

    发明人： Donn Michael Herron ,  Adam Adrian Brostow

    IPC分类号： F25J100

    CPC分类号： F25J3/04103 ,  F25J3/04054 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04303 ,  F25J3/04309 ,  F25J3/04393 ,  F25J3/04412 ,  F25J2205/04 ,  F25J2215/50 ,  F25J2250/40 ,  F25J2250/42 ,  F25J2250/50 ,  F25J2250/52 ,  F25J2290/12

    摘要： A process is provided for the production of intermediate pressure oxygen. Intermediate pressure is defined as a pressure range between about 15 psia and about 27 psia, and preferably between about 17 psia and about 23 psia. The process uses a double column cryogenic air separation system for the production of oxygen from air which includes a higher pressure column and a lower pressure column, wherein a nitrogen-enriched fraction from the higher pressure column is condensed by indirect heat exchange in a reboiler-condenser that provides at least a fraction of the boilup at the bottom of the lower pressure column. Oxygen is withdrawn from the lower pressure column as a liquid and vaporized. One portion of air is feed air to the higher pressure column and a another portion of air is at least partially condensed by indirect heat exchange with the vaporizing oxygen. The latter portion of air is at least partially condensed at a pressure less than the pressure of the feed air to the higher pressure column. The process is suitable for the production of intermediate pressure oxygen with a purity of at least about 85 mole %.

    摘要翻译： 提供了用于生产中压氧的方法。 中间压被定义为在约15psia至约27psia之间，优选在约17psia至约23psia之间的压力范围。 该方法使用双柱低温空气分离系统，用于从空气中产生氧气，其包括较高压力塔和较低压力塔，其中来自高压塔的富氮馏分通过在再沸器中的间接热交换而冷凝， 冷凝器，其在低压塔的底部提供至少一部分煮沸。 氧气作为液体从低压塔中取出并汽化。 空气的一部分是进入高压塔的空气，另一部分空气通过与汽化氧的间接热交换而至少部分地冷凝。 空气的后一部分在低于进入高压塔的进料空气的压力的压力下至少部分冷凝。 该方法适用于生产纯度至少为约85％（摩尔）的中压氧气。

    Single expander and a cold compressor process to produce oxygen
    5.
    发明授权
    Single expander and a cold compressor process to produce oxygen 失效
    单一膨胀机和冷压机生产氧气

    公开(公告)号：US5901576A

    公开(公告)日：1999-05-11

    申请号：US10966

    申请日：1998-01-22

    申请人： Rakesh Agrawal ,  Donn Michael Herron ,  Yanping Zhang

    发明人： Rakesh Agrawal ,  Donn Michael Herron ,  Yanping Zhang

    IPC分类号： F25J3/04 ,  F25J3/00

    CPC分类号： F25J3/04351 ,  F25J3/04054 ,  F25J3/0406 ,  F25J3/0409 ,  F25J3/04284 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/04418 ,  F25J2200/54 ,  F25J2215/50 ,  F25J2250/20 ,  F25J2250/42 ,  F25J2250/52

    摘要： In a process for the cryogenic distillation of air in a distillation column system that contains at least one distillation column wherein the boil-up at the bottom of the distillation column producing the oxygen product is provided by condensing a stream whose nitrogen concentration is equal to or greater than that in the feed air stream, which comprises the steps of: (a) generating work energy which is in excess of the overall refrigeration demand of the distillation column system by at least one of the following three methods: (1) work expanding a first process stream with nitrogen content equal to or greater than that in the feed air and then condensing at least a portion of the expanded stream by latent heat exchange with at least one of the two liquids: (i) a liquid at an intermediate height in the distillation column producing oxygen product and (ii) one of the liquid feeds to this distillation column having an oxygen concentration equal to or preferably greater than the concentration of oxygen in the feed air; (2) condensing at least a second process stream with nitrogen content equal to or greater than that in the feed air by latent heat exchange with at least a portion of an oxygen-enriched liquid stream which has oxygen concentration equal to or preferably greater than the concentration of oxygen in the feed air and which is also at a pressure greater than the pressure of the distillation column producing oxygen product, and after vaporization of at least a portion of oxygen-enriched liquid into a vapor fraction due to latent heat exchange, work expanding at least a portion of the resulting vapor stream; and (3) work expanding a fraction of the feed air; (b) using the work which is generated in excess of the refrigeration need of the distillation column system to cold compress a process stream at a temperature lower than the ambient temperature.

    摘要翻译： 在含有至少一个蒸馏塔的蒸馏塔系统中对空气进行低温蒸馏的方法中，其中产生氧产物的蒸馏塔底部的沸腾是通过将其浓度等于或等于 大于进料空气流，其包括以下步骤：（a）通过以下三种方法中的至少一种产生超过蒸馏塔系统的总体制冷需求的工作能量：（1）工作扩展 氮气含量等于或大于进料空气中的第一工艺流，然后通过与两种液体中的至少一种进行潜热交换来冷凝至少一部分膨胀流：（i）中间高度的液体 在蒸馏塔中生产氧气产物和（ii）到该蒸馏塔的液体进料之一，其氧浓度等于或优选大于浓度 进料空气中的氧气; （2）通过与氧浓度等于或优选大于或等于或等于或等于或等于或等于或等于或等于或等于或等于或等于的氧的富氧液流的至少一部分的潜热交换来冷凝至少等于或大于进料空气中的氮含量的第二工艺流 进料空气中的氧气浓度也大于产生氧气产物的蒸馏塔的压力的压力，并且在至少一部分富氧液体由于潜热换热而蒸发成蒸气馏分之后，工作 膨胀所得蒸气流的至少一部分; 和（3）扩大进料空气的一部分; （b）使用超过蒸馏塔系统的制冷需要产生的作业在低于环境温度的温度下冷却工艺流。

    Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process
    9.
    发明授权
    Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process 有权
    蒸馏多组分流体的方法和从低温空气分离过程产生富氩流

    公开(公告)号：US06240744B1

    公开(公告)日：2001-06-05

    申请号：US09459561

    申请日：1999-12-13

    申请人： Rakesh Agrawal ,  Donn Michael Herron ,  Jung Soo Choe

    发明人： Rakesh Agrawal ,  Donn Michael Herron ,  Jung Soo Choe

    IPC分类号： F25J300

    CPC分类号： F25J3/04703 ,  B01D3/14 ,  B01D3/141 ,  B01D3/146 ,  F25J3/04412 ,  F25J3/04666 ,  F25J3/04678 ,  F25J3/04733 ,  F25J3/04939 ,  F25J2205/60 ,  F25J2205/80 ,  F25J2205/82 ,  F25J2235/58 ,  F25J2245/58 ,  Y10S62/905 ,  Y10S62/924

    摘要： A process separates a multicomponent feed by distillation into at least one stream enriched in the most volatile component, one stream enriched in the least volatile component, and one stream enriched in a component of intermediate volatility. In one embodiment, the process produces an argon-enriched stream from a cryogenic air separation process. The distillation system includes at least one distillation column that produces a nitrogen-enriched stream from the top of the column, an oxygen product stream from the bottom of the column, and an argon-enriched stream from a partitioned section. The geometry of the partitioned section minimizes vapor and liquid distribution, and includes a vertical separating element and an end separating element to isolate the partitioned section from the intermediate distillation section. The equivalent diameter (De) of the partitioned section is at least 60% of the ideal diameter (Di) of the partitioned section, wherein the equivalent diameter is defined as four times the cross sectional flow area enclosed by the vertical separating element divided by the perimeter formed by the vertical separating element, and the ideal diameter (Di) is the diameter of a circle which has the same cross sectional flow area as that cross sectional flow area which is enclosed by the vertical separating element.

    摘要翻译： 一种方法是通过蒸馏将多组分进料分离成富含最易挥发组分的至少一种物流，富含最不易挥发组分的一种物流和富含中等挥发性组分的一种物流。 在一个实施方案中，该方法从低温空气分离过程产生富氩流。 蒸馏系统包括至少一个蒸馏塔，其从塔的顶部产生富氮流，来自塔底的氧产物流和来自分隔区的富氩流。 分隔部分的几何形状使蒸汽和液体分布最小化，并且包括垂直分离元件和端部分离元件以将分隔部分与中间蒸馏部分隔离。 分隔部分的当量直径（De）为分隔部分的理想直径（Di）的至少60％，其中等效直径定义为垂直分离元件所包围的横截面流动面积的四倍 由垂直分离元件形成的周边，理想直径（Di）是与由垂直分离元件包围的横截面积面积相同的横截面积面积的圆的直径。

    Production of argon from a cryogenic air separation process
    10.
    发明授权
    Production of argon from a cryogenic air separation process 失效
    从低温空气分离过程生产氩气

    公开(公告)号：US5970743A

    公开(公告)日：1999-10-26

    申请号：US96009

    申请日：1998-06-10

    申请人： Donn Michael Herron ,  Stephen John Cook ,  Rakesh Agrawal

    发明人： Donn Michael Herron ,  Stephen John Cook ,  Rakesh Agrawal

    IPC分类号： C01B23/00 ,  F25J3/04

    CPC分类号： F25J3/04721 ,  F25J3/04412 ,  F25J3/04624 ,  F25J3/04678 ,  F25J3/04727 ,  F25J3/04872 ,  F25J2200/32 ,  F25J2200/34 ,  F25J2200/90 ,  F25J2205/02 ,  F25J2205/30 ,  F25J2245/58 ,  F25J2250/10 ,  Y10S62/924

    摘要： The present invention relates to a process for the cryogenic separation of air to recover at least a nitrogen-depleted crude argon product, wherein the process is carried out in a primary distillation system comprising at least a first distillation column, which separates a feed mixture comprising nitrogen, oxygen and argon into a nitrogen-enriched overhead and an oxygen-rich bottoms, and a side-arm column which rectifies an argon-containing feed stream fed from the primary distillation column to produce an essentially-oxygen-depleted argon overhead. The improvement of the present invention is characterized in that: (a) a nitrogen-containing, argon-rich side stream is withdrawn from a location of the side-arm column which is above the location of entry of the argon-containing feed stream; (b) the withdrawn, nitrogen-containing, argon-rich side stream of step (a) is fed to a nitrogen rejection column to remove the contained nitrogen, wherein the nitrogen rejection column contains at least a stripping section which is located below the location of the feed of the nitrogen-lean, argon-rich side stream, and wherein the stripping section of the nitrogen rejection column is provided with vapor boilup; (c) the nitrogen-depleted, crude argon product is recovered and removed from the bottom of the nitrogen rejection column; and (d) at least a portion of upward flowing vapor in the nitrogen rejection column is removed and the removed portion is returned to a suitable location of the side-arm column.

    摘要翻译： 本发明涉及一种用于低温分离空气以回收至少一种贫氮粗氩产物的方法，其中该方法在包含至少第一蒸馏塔的一级蒸馏系统中进行，所述第一蒸馏塔分离包含 氮气，氧气和氩气进入富氮塔顶和富氧底物，以及侧臂塔，其对从一级蒸馏塔进料的含氩进料流进行整流，以产生基本上不含氧的氩塔顶馏出物。 本发明的改进的特征在于：（a）含氮富氩侧流从位于含氩进料流进入位置的侧臂塔的位置排出; （b）将步骤（a）的取出的含氮富氩侧流进料至氮排除塔以除去所含的氮，其中氮排除塔至少包含位于位置下方的汽提部分 的贫氮富氩侧流的进料，并且其中氮排除塔的汽提段设置有蒸汽沸腾; （c）从氮排除塔的底部回收并除去贫氮粗氩产物; 和（d）氮排除塔中的向上流动的蒸气的至少一部分被去除，并且将去除的部分返回到侧臂塔的适当位置。