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    System to increase capacity of LNG-based liquefier in air separation process
    5.
    发明申请
    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：US20080000266A1

    公开(公告)日：2008-01-03

    申请号：US11477924

    申请日：2006-06-30

    申请人： Douglas Dee ,  Jung Choe ,  Donn Herron

    发明人： Douglas Dee ,  Jung Choe ,  Donn Herron

    IPC分类号： F25J3/00

    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。

    Method and apparatus for separating air to produce an oxygen product
    8.
    发明授权
    Method and apparatus for separating air to produce an oxygen product 失效
    用于分离空气以产生氧产物的方法和装置

    公开(公告)号：US06178775B2

    公开(公告)日：2001-01-30

    申请号：US09182981

    申请日：1998-10-30

    申请人： Paul Higginbotham ,  Joseph P. Naumovitz

    发明人： Paul Higginbotham ,  Joseph P. Naumovitz

    IPC分类号： F25J300

    CPC分类号： F25J3/042 ,  F25J3/0406 ,  F25J3/0409 ,  F25J3/04303 ,  F25J3/04351 ,  F25J3/04424 ,  F25J2200/90 ,  F25J2240/44 ,  F25J2250/20

    摘要： A method and apparatus of separating air to produce an oxygen product. In accordance with the method and apparatus the air is rectified within a double column arrangement. The lower pressure column has lower and intermediate reboilers. Nitrogen from the higher pressure column is compressed and sent to the lower reboiler and oxygen tower overhead from the higher pressure column is fed to the intermediate reboiler. The resultant liquid is used to reflux both columns. The advantages in the arrangement set forth above is that the higher pressure column may be made to operate at a lower pressure to conserve energy.

    摘要翻译： 一种分离空气以产生氧产物的方法和装置。 根据方法和装置，空气在双列排列中被整流。 低压塔具有较低和中等重沸器。 将来自较高压力塔的氮气压缩并送入下部再沸器，将来自较高压力塔的塔顶塔架送入中间再沸器。 所得液体用于回流两个柱。 上述布置中的优点是可以使较高压力塔在较低压力下操作以节省能量。

    Single expander and a cold compressor process to produce oxygen
    9.
    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。