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    System to increase capacity of LNG-based liquefier in air separation process
    4.
    发明授权
    System to increase capacity of LNG-based liquefier in air separation process 有权
    在空气分离过程中增加液化天然气液化器的能力

    公开(公告)号：US07712331B2

    公开(公告)日：2010-05-11

    申请号：US11477924

    申请日：2006-06-30

    申请人： Douglas Paul Dee ,  Jung Soo Choe ,  Donn Michael Herron

    发明人： Douglas Paul Dee ,  Jung Soo Choe ,  Donn Michael Herron

    IPC分类号： F25J1/00 ,  F25J3/00 ,  F17C9/02

    CPC分类号： F25J1/0264 ,  F25J1/0015 ,  F25J1/004 ,  F25J1/0224 ,  F25J1/0234 ,  F25J1/0245 ,  F25J1/0292 ,  F25J3/0406 ,  F25J3/04224 ,  F25J3/04266 ,  F25J3/04272 ,  F25J3/04351 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04812 ,  F25J3/04969 ,  F25J2210/02 ,  F25J2210/62 ,  F25J2230/08 ,  F25J2230/42 ,  F25J2245/42

    摘要： A system is set forth to increase the capacity of an LNG-based liquefier in a cryogenic air separation unit wherein, in a low production mode, the nitrogen that is fed to the LNG-based liquefier consists only of at least a portion of the high pressure nitrogen from the distillation column system while in a high production mode, a supplemental compressor is used to boost the pressure of at least a portion of the low pressure nitrogen from the distillation column system to create additional (or replacement) feed to the LNG-based liquefier. A key to the present invention is the supplemental compressor and the associated heat exchange equipment is separate and distinct from the LNG-based liquefier. This allows its purchase to be delayed until a capacity increase is actually needed and thus avoid building an oversized liquefier based on a speculative increase in liquid product demand.

    摘要翻译： 提出了一种系统来提高低温空气分离装置中基于液化天然气的液化器的容量，其中在低生产模式中，供给到基于LNG的液化器的氮仅由至少一部分高的 来自蒸馏塔系统的高压氮气在高生产模式下，补充压缩机用于提高来自蒸馏塔系统的至少一部分低压氮气的压力，以产生到LNG- 液化器。 本发明的关键是补充压缩机，并且相关联的热交换设备与基于液化天然气的液化器是独立的和不同的。 这允许其购买被延迟，直到实际需要增加容量，从而避免在液体产品需求的推测性增加的情况下构建过大的液化器。

    Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process
    7.
    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。

    Single expander and a cold compressor process to produce oxygen
    8.
    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。

    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。