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公开(公告)号：US06298688B1
公开(公告)日：2001-10-09
申请号：US09415996
申请日：1999-10-12
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。
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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。
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公开(公告)号：US06484516B1
公开(公告)日：2002-11-26
申请号：US10010171
申请日：2001-12-07
IPC分类号： F25B900
CPC分类号： F25B9/10 , F25B1/10 , F25B9/02 , F25B9/06 , F25B2400/05 , F25B2400/13
摘要： A cryocooler system comprising a heat exchanger for cooling a compressed returning warmed cryogenic fluid stream, the heat exchanger having a bypass loop to produce a major stream and a minor stream exiting the heat exchanger. The minor stream is further cooled by expansion and used as a heat exchange medium for an external heat load after which it is compressed and returned to the heat exchanger for heat exchange with the compressed return warmed cryogenic fluid stream. The major stream is further cooled by expansion and recirculated to the heat exchanger to cool the compressed returning warmed cryogenic fluid stream. The major stream and minor stream are combined either inside or outside of said heat exchanger to form the warmed cryogenic fluid inlet stream for compression.
摘要翻译： 一种低温冷却器系统，包括用于冷却压缩的返回的温热低温流体流的热交换器，所述热交换器具有旁路回路以产生主流和离开热交换器的次流。 小流体通过膨胀进一步冷却并用作用于外部热负荷的热交换介质，然后将其压缩并返回到热交换器以与压缩的回流温热低温流体流进行热交换。 主流通过膨胀进一步冷却并再循环到热交换器以冷却压缩的返回的温热低温流体流。 主流和次流在所述热交换器的内部或外部组合以形成用于压缩的加热的低温流体入口流。
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公开(公告)号：US5966967A
公开(公告)日：1999-10-19
申请号：US012074
申请日：1998-01-22
CPC分类号： F25J3/04066 , F25J3/04054 , F25J3/0406 , F25J3/0409 , F25J3/04284 , F25J3/04303 , F25J3/04309 , F25J3/04351 , F25J3/04381 , F25J3/04393 , F25J3/04412 , F25J3/04418 , F25J3/04878 , F25J2200/20 , F25J2200/34 , F25J2200/54 , F25J2215/52 , F25J2235/42 , F25J2245/42 , 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. The process of the present invention 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; (b) work expanding a process stream to produce additional work energy such that the total work generated along with step (a) exceeds the total refrigeration demand of the cryogenic plant; and (c) 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： 本发明涉及一种蒸馏塔系统中空气的低温蒸馏方法，该蒸馏塔系统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流量。 本发明的方法包括以下步骤：（a）产生至少10％（10％）蒸馏塔系统制冷需求的工作能量; （b）扩大工艺流程以产生额外的工作能量，使得与步骤（a）一起产生的总工作量超过了低温设备的总制冷需求; 和（c）使用超过蒸馏塔系统的制冷需要产生的工作在低于环境温度的温度下冷却工艺流。
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5.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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6.发明授权公开(公告)号：US06240744B1
公开(公告)日：2001-06-05
申请号：US09459561
申请日：1999-12-13
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。
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公开(公告)号：US5970743A
公开(公告)日：1999-10-26
申请号：US96009
申请日：1998-06-10
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。
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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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10.发明授权Process for the purification of a major component containing light and heavy impurities 失效用于净化含有轻质和重杂质的主要成分的方法公开(公告)号：US06263701B1
公开(公告)日：2001-07-24
申请号：US09390077
申请日：1999-09-03
IPC分类号： F25J302
CPC分类号： B01D3/146 , F25J3/08 , F25J2200/04 , F25J2200/50 , F25J2210/50 , F25J2215/56 , F25J2220/50 , F25J2220/52 , F25J2290/40
摘要： A process purifies and recovers a major component from a feed stream containing: the major component at a concentration of at least 90 mole %, at least one light component having a greater volatility than the volatility of the major component, and at least one heavy component having a lesser volatility than the volatility of the major component. The process uses a distillation system, wherein at least three streams are produced: the purified major component, a stream enriched in a light component, and a stream enriched in a heavy component. The distillation system includes a higher pressure column and a lower pressure column with thermal linking achieved by condensing at least some of the vapor from the higher pressure column in a reboiler-condenser which provides at least some of the boilup for the lower pressure column. The process is applicable to the purification and recovery of electronic-grade oxygen from a standard-grade oxygen supply.
摘要翻译： 一种方法从进料流中纯化和回收主要组分，所述进料流含有至少90摩尔％的浓度的主要组分，至少一种具有比主要组分挥发性更大的挥发性的轻组分，以及至少一种重组分 波动性大于主要成分的波动性。 该方法使用蒸馏系统，其中产生至少三种物流：纯化的主要组分，富含轻组分的物流和富含重组分的物流。 蒸馏系统包括高压塔和具有热连接的低压塔，其通过在再沸器 - 冷凝器中冷凝来自较高压力塔的至少一些蒸汽来实现，所述再沸器 - 冷凝器提供至少一些用于低压塔的沸腾。 该方法适用于从标准级氧气供应中纯化和回收电子级氧气。
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