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公开(公告)号：US5934104A
公开(公告)日：1999-08-10
申请号：US88993
申请日：1998-06-02
CPC分类号： F25J3/04872 , F25J3/04224 , F25J3/04284 , F25J3/04303 , F25J3/04321 , F25J3/04351 , F25J3/04442 , F25J3/04454 , F25J2200/20 , F25J2200/34 , F25J2200/50 , F25J2200/54 , F25J2215/52 , F25J2215/56 , F25J2235/42 , F25J2245/50 , F25J2250/20 , Y10S62/90
摘要： The present invention is an improvement to a nitrogen generator enabling the process to efficiently coproduce oxygen with low recovery, typically less than 70% and preferably less than 55%, in addition to the primary product, nitrogen. In the nitrogen generator process, air is distilled in a distillation column system having a higher pressure column and a lower pressure column. The feed air is compressed, treated to remove water and carbon dioxide, cooled to near its dew point and fed to the higher pressure column of the distillation column system. The nitrogen product is produced by removing an overhead vapor stream from at least one of the columns of the distillation column system. At least one oxygen-enriched stream is removed from the lower pressure column. The improvement is characterized in that: (a) the oxygen-enriched stream is removed from the lower pressure column at a location that is at or below the feed to the lower pressure column; (b) feeding the removed oxygen-enriched stream to a supplemental distillation column for separation into an oxygen bottoms and a waste overhead; (c) providing boilup to the supplemental distillation column and (d) removing an oxygen stream (vapor or liquid) from the bottom of the supplemental distillation column as an oxygen product.
摘要翻译： 本发明是对氮气发生器的改进，使得该方法除了主要产物氮之外，能够以低回收率（通常小于70％，优选小于55％）有效地共生氧气。 在氮气发生器过程中，在具有较高压力塔和低压塔的蒸馏塔系统中蒸馏空气。 进料空气被压缩，处理以除去水和二氧化碳，冷却到接近其露点并进料到蒸馏塔系统的高压塔中。 通过从蒸馏塔系统的塔中的至少一个塔除去顶部蒸汽流来生产氮气产物。 从低压塔中除去至少一个富氧流。 其改进的特征在于：（a）在低压塔的进料处于或低于低压塔的进料位置，从低压塔中除去富氧料流; （b）将去除的富氧物流送入补充蒸馏塔以分离成氧底部和废物塔顶; （c）向补充蒸馏塔提供煮沸和（d）从补充蒸馏塔的底部除去作为氧产物的氧气流（蒸汽或液体）。
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22.发明授权Distillation process using a mixing column to produce at least two oxygen-rich gaseous streams having different oxygen purities 失效使用混合塔进行蒸馏处理以产生具有不同氧纯度的至少两个富氧气流
公开(公告)号：US5865041A
公开(公告)日：1999-02-02
申请号：US071481
申请日：1998-05-01
IPC分类号： F25J3/04
CPC分类号： F25J3/04466 , F25J3/0446 , F25J3/04969 , F25J2200/06 , F25J2200/94 , F25J2215/52 , F25J2235/50
摘要： A process is set forth for the cryogenic distillation of an air feed to produce at least two oxygen-rich gaseous streams having different oxygen purities. The process uses a mixing column system in addition to a distillation column system. A key to the process is that at least two oxygen-rich liquid streams having different oxygen purities are transferred from the distillation column system to the mixing column system in order to produce the oxygen-rich gaseous streams.
摘要翻译： 阐述了一种用于空气进料的低温蒸馏以产生具有不同氧纯度的至少两种富氧气流的方法。 该方法除了蒸馏塔系统之外还使用混合塔系统。 该方法的关键是至少有两个具有不同氧纯度的富氧液体物流从蒸馏塔系统转移到混合塔系统，以产生富氧气流。
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公开(公告)号：US08601833B2
公开(公告)日：2013-12-10
申请号：US11875052
申请日：2007-10-19
CPC分类号： F25J3/04412 , F25J1/0015 , F25J1/0221 , F25J1/0234 , F25J3/04018 , F25J3/04157 , F25J3/04224 , F25J3/04266 , F25J3/04351 , F25J2210/62 , F25J2230/02 , F25J2230/04 , F25J2270/904
摘要： An air stream is compressed in multiple stages using refrigeration derived from a refrigerant comprising natural gas for inter-stage cooling. The possibility of natural gas leaking into the air stream is reduced by use of an intermediate cooling medium (“ICM”) to transfer the refrigeration from the refrigerant to the inter-stage air stream. The compressed air stream can be fed to a cryogenic air separation unit that includes an LNG-based liquefier unit from which a cold natural gas stream is withdrawn for use as said refrigerant.
摘要翻译： 使用来自包含天然气的制冷剂的制冷从多级压缩空气流进行级间冷却。 通过使用中间冷却介质（“ICM”）将制冷剂从制冷剂转移到级间空气流中，使天然气泄漏到空气流中的可能性降低。 压缩空气流可以被供给到低温空气分离单元，该低温空气分离单元包括基于液化天然气的液化器单元，冷的天然气流从该液化器单元被排出以用作所述制冷剂。
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公开(公告)号：US20130153037A1
公开(公告)日：2013-06-20
申请号：US13328009
申请日：2011-12-16
CPC分类号： B01D3/008 , B01D3/20 , F25J3/04848 , F25J3/04927 , F25J2290/10 , Y10T29/49826 , Y10T137/0318
摘要： An apparatus for distributing a flow of a liquid descending in an inner space of a packed column includes: a collector to collect the flow of the liquid; a mixer below and vertically spaced apart from the collector to receive and mix the liquid collected; a first conduit to receive and transmit at least part of the liquid from a first sector of the collector to a first zone of the mixer; and a second conduit to receive and transmit at least part of the liquid from a second sector of the collector to a second zone of the mixer. A geometric center of the first sector of the collector is positioned circumferentially away from a geometric center of the first zone of the mixer and/or a geometric center of the collector's second sector is positioned circumferentially away from a geometric center of the mixer's second zone.
摘要翻译： 用于分配在填充塔的内部空间中下降的液体流的装置包括：收集器，用于收集液体的流动; 下面的混合器并且与收集器垂直间隔开以收集和混合所收集的液体; 第一管道，其将至少部分液体从收集器的第一部分接收并传输到混合器的第一区域; 以及第二导管，用于接收并将至少部分液体从收集器的第二扇区传送到混合器的第二区域。 收集器的第一扇区的几何中心位于周向远离混合器的第一区域的几何中心的位置和/或收集器第二扇区的几何中心位于周向远离混合器的第二区域的几何中心的位置。
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公开(公告)号：US08132411B2
公开(公告)日：2012-03-13
申请号：US12266161
申请日：2008-11-06
申请人： Jianguo Xu , Donn Michael Herron
发明人： Jianguo Xu , Donn Michael Herron
IPC分类号： F01K25/06
CPC分类号： F17C9/04 , F17C2221/033 , F17C2223/0161 , F17C2223/033 , F17C2225/0123 , F17C2225/035 , F17C2227/0323 , F17C2227/0393 , F17C2260/046 , F17C2265/05 , F17C2270/0581
摘要： A method and system for generating power in a vaporization of liquid natural gas process, the method comprising pressurizing a working fluid; heating and vaporizing the working fluid; expanding the working fluid in one or more expanders for the generation of power, the working fluid comprises: 2-11 mol % nitrogen, methane, a third component whose boiling point is greater than or equal to that of propane, and a fourth component comprising ethane or ethylene; cooling the working fluid such that the working fluid is at least substantially condensed; and recycling the working fluid, wherein the cooling of the working fluid occurs through indirect heat exchange with a pressurized liquefied natural gas stream in a heat exchanger, and wherein the flow rate of the working fluid at an inlet of the heat exchanger is equal to the flow rate of the working fluid at an outlet of the heat exchanger.
摘要翻译： 一种用于在液体天然气工艺的蒸发中产生动力的方法和系统，所述方法包括对工作流体加压; 加热和蒸发工作流体; 在一个或多个膨胀机中膨胀工作流体以产生动力，工作流体包括：2-11mol％的氮气，甲烷，沸点大于或等于丙烷的第三组分，第四组分包含 乙烷或乙烯; 冷却工作流体，使得工作流体至少基本上冷凝; 并且回收所述工作流体，其中所述工作流体的冷却通过与热交换器中的加压液化天然气流的间接热交换而发生，并且其中所述热交换器入口处的工作流体的流量等于 热交换器出口处的工作流体的流量。
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26.发明授权
公开(公告)号：US06009723A
公开(公告)日：2000-01-04
申请号：US12093
申请日：1998-01-22
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。
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公开(公告)号：US5956974A
公开(公告)日：1999-09-28
申请号：US10965
申请日：1998-01-22
CPC分类号： F25J3/04309 , F25J3/04284 , F25J3/04303 , F25J3/04393 , F25J3/04412 , F25J2200/54 , F25J2215/50 , F25J2250/20 , F25J2250/42 , F25J2250/52
摘要： The present invention relates to 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 at least ten percent (10%) of the overall refrigeration demand of the distillation column system by at least one of the following two 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; and (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.
摘要翻译： 本发明涉及一种蒸馏塔系统中空气的低温蒸馏方法，该方法含有至少一个蒸馏塔，其中产生氧产物的蒸馏塔底部的沸腾是通过将氮浓度 等于或大于进料空气流中的至少一种，其包括以下步骤：（a）通过以下步骤中的至少一种产生至少10％（10％）的蒸馏塔系统的制冷需求的工作能量： 以下两种方法：（1）扩大氮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的流 ：（i）在蒸馏塔中的中间高度的液体产生氧产物，和（ii）具有氧浓度等于该蒸馏塔的液体进料之一 或更优选地大于进料空气中的氧浓度; 和（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的氧的富氧液体流的至少一部分进行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，其压力也大于产生氧气产物的蒸馏塔的压力。
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公开(公告)号：US5956973A
公开(公告)日：1999-09-28
申请号：US929813
申请日：1997-09-15
IPC分类号： F25J3/04
CPC分类号： F25J3/04303 , F25J3/04084 , F25J3/0409 , F25J3/04284 , F25J3/04393 , F25J3/04412 , F25J3/04709 , F25J2200/54 , F25J2215/52 , F25J2215/54 , F25J2250/30 , F25J2250/50 , F25J2250/52 , Y10S62/924
摘要： A double column cryogenic air separation system is operated to increase boilup in the lower pressure column by vaporizing at an intermediate pressure a liquid stream containing at least 20 mole % oxygen, work expanding the stream, and introducing the resulting expanded stream into the lower pressure column. Operation in this mode increases oxygen recovery at a given rate of compressed and purified air feed or reduces the amount air feed required to produce a given rate of oxygen product. Argon recovery can be integrated efficiently with the intermediate pressure vaporization and work expansion steps.
摘要翻译： 操作双塔低温空气分离系统以通过在中等压力下蒸发含有至少20摩尔％氧气的液体流，使流动扩展并将所得膨胀流引入低压塔中来增加低压塔中的沸腾 。 在这种模式下的操作以给定的压缩和净化空气进料速率增加氧气回收，或减少产生给定速率的氧气产物所需的空气进料量。 氩回收可以有效地与中压蒸发和工作膨胀步骤相结合。
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