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    AIR SEPARATION METHOD AND APPARATUS
    3.
    发明申请
    AIR SEPARATION METHOD AND APPARATUS 审中-公开
    空气分离方法和装置

    公开(公告)号：US20130139547A1

    公开(公告)日：2013-06-06

    申请号：US13674393

    申请日：2012-11-12

    申请人： Henry Edward Howard ,  Matthew R. Watt ,  Thomas J. Bergman, JR.

    发明人： Henry Edward Howard ,  Matthew R. Watt ,  Thomas J. Bergman, JR.

    IPC分类号： F25J3/04

    CPC分类号： F25J3/0409 ,  F25J3/04103 ,  F25J3/04206 ,  F25J3/04212 ,  F25J3/0423 ,  F25J3/04254 ,  F25J3/04284 ,  F25J3/0443 ,  F25J3/04884 ,  F25J2200/20 ,  F25J2205/02 ,  F25J2210/42 ,  F25J2210/50 ,  F25J2240/44 ,  F25J2250/02 ,  F25J2270/02

    摘要： A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.

    摘要翻译： 一种生产氧和氮共同产物的方法和装置，其中将压缩的和纯化的空气流冷却，完全或部分冷凝，然后在主蒸馏塔中进行精馏，以形成富氮蒸汽塔塔顶馏出物和粗液氧 。 将粗液氧气流减压，然后在辅助蒸馏塔中用汽提气汽提，以产生富氧液体。 来自主蒸馏塔的富氮蒸汽塔塔顶用于形成氮产物，粗液氧部分汽化，产生汽提气体，残余富氧液体和液氮回流至主蒸馏塔。 通过在冷凝压缩和纯化的空气流中提供热交换负荷或通过冷凝用于回流主蒸馏塔中的富氮蒸气，从残余富氧液体形成氧气产物。

    Process for the production of intermediate pressure oxygen
    6.
    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。

    Elevated pressure air separation process with use of waste expansion for compression of a process stream
    7.
    发明授权
    Elevated pressure air separation process with use of waste expansion for compression of a process stream 失效
    高压空气分离过程使用废物膨胀来压缩工艺流

    公开(公告)号：US06009723A

    公开(公告)日：2000-01-04

    申请号：US12093

    申请日：1998-01-22

    申请人： Zbigniew Tadeusz Fidkowski ,  Donn Michael Herron

    发明人： Zbigniew Tadeusz Fidkowski ,  Donn Michael Herron

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04103 ,  F25J3/04024 ,  F25J3/0403 ,  F25J3/04036 ,  F25J3/04054 ,  F25J3/0406 ,  F25J3/04066 ,  F25J3/0409 ,  F25J3/04115 ,  F25J3/04284 ,  F25J3/04309 ,  F25J3/04315 ,  F25J3/04351 ,  F25J3/04381 ,  F25J3/04393 ,  F25J3/04412 ,  F25J3/04581 ,  F25J2200/20 ,  F25J2215/40 ,  F25J2250/42 ,  F25J2250/52

    摘要： The present invention relates to an elevated pressure air separation cryogenic process wherein feed air is compressed, treated to remove water and carbon dioxide, cooled to cryogenic temperature in a main heat exchanger having a cold end and a warm end and fed to a distillation column system having at least two (2) distillation columns for separation into at least a nitrogen-enriched product, an oxygen-enriched product and a gaseous waste stream characterized in that at least a portion of said waste stream is (isentropically) expanded to produce work and work produced by the expansion is used to provide at least a portion of the work required to compress a process stream other than the gaseous waste stream at a temperature warmer than the temperature of the cold end of said main heat exchanger. The alternative process streams to be compressed can be: at least a portion of the feed air, at least a portion of the oxygen-enriched product or at least a portion of the nitrogen-enriched product.

    摘要翻译： 本发明涉及一种高压空气分离低温方法，其中进料空气被压缩，处理以去除在具有冷端和热端的主热交换器中冷却至低温的水和二氧化碳，并进料至蒸馏塔系统 具有至少两个用于分离成至少富氮产物的蒸馏塔，富氧产物和气态废物流，其特征在于，所述废物流的至少一部分（等熵）被扩展以产生作业和 通过膨胀生产的工作用于提供在比所述主热交换器的冷端的温度更高的温度下压缩除气态废物流之外的工艺流所需的工作的至少一部分。 待压缩的替代工艺流可以是：进料空气的至少一部分，富氧产物的至少一部分或富氮产物的至少一部分。

    Three column cryogenic cycle for the production of impure oxygen and pure nitrogen
    9.
    发明授权
    Three column cryogenic cycle for the production of impure oxygen and pure nitrogen 失效
    三柱低温循环用于生产不纯氧和纯氮

    公开(公告)号：US5682764A

    公开(公告)日：1997-11-04

    申请号：US738158

    申请日：1996-10-25

    申请人： Rakesh Agrawal ,  Zbigniew Tadeusz Fidkowski

    发明人： Rakesh Agrawal ,  Zbigniew Tadeusz Fidkowski

    IPC分类号： F25J3/04 ,  F25J1/00

    CPC分类号： F25J3/04103 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04212 ,  F25J3/04303 ,  F25J3/04448 ,  F25J3/04884 ,  F25J2200/20 ,  F25J2200/32 ,  F25J2200/54 ,  F25J2205/02 ,  F25J2240/46 ,  F25J2250/10 ,  F25J2250/20 ,  F25J2250/40 ,  F25J2250/50 ,  Y10S62/90

    摘要： A cryogenic process for producing impure oxygen and/or substantially pure nitrogen utilizes a classic double column arrangement and an additional third column operating at a medium pressure, i.e. between the pressure of the higher pressure stage and the lower pressure stage of the double column system. A portion of the feed air is separated in the stages of the double column system, and another portion of the feed air is distilled in the medium pressure stage. Crude liquid oxygen from the higher pressure stage and/or the medium pressure stage is reduced in pressure and boiled in a reboiler/condenser at the top of the medium pressure column. The vaporized crude liquid oxygen from the top reboiler/condenser of the medium pressure column is subsequently introduced as a vapor feed to the lower pressure stage, which reduces irreversibilities of separation in the lower pressure stage.

    摘要翻译： 用于产生不纯氧和/或基本上纯氮的低温方法利用经典的双柱装置和在中压下即在高压级的压力和双塔系统的较低压力级之间操作的另外的第三塔。 进料空气的一部分在双塔系统的阶段被分离，另一部分进料空气在中压阶段被蒸馏。 来自较高压级和/或中压级的粗液态氧在压力下减压并在中压塔顶部的再沸器/冷凝器中煮沸。 随后将来自中压塔的顶部再沸器/冷凝器的蒸发的粗液氧气作为蒸气进料引入到低压级，这降低了在低压级中分离的不可逆性。

    Air separation process for the production of oxygen-rich and nitrogen-rich products
    10.
    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。