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1.发明授权
公开(公告)号：US5351492A
公开(公告)日：1994-10-04
申请号：US950116
申请日：1992-09-23
CPC分类号： F25J3/044 , F25J3/04048 , F25J3/0406 , F25J3/04212 , F25J3/04278 , F25J3/04284 , F25J3/04309 , F25J3/04333 , F25J3/04351 , F25J3/04412 , F25J3/04793 , F25J2200/30 , F25J2200/50 , F25J2200/72 , F25J2200/74 , F25J2200/94 , F25J2215/44 , F25J2220/42 , F25J2220/44 , F25J2230/08 , F25J2245/42 , F25J2250/20 , F25J2270/02 , F25J2270/12 , F25J2290/12 , Y10S62/92
摘要： The present invention relates an improvement to a cryogenic process for the separation of air which produces at least a nitrogen product and is carried out in a distillation column system having at least one distillation column from which the nitrogen product is produced. The distillation column of the distillation column system must comprise a rectifying section. In the process of the present invention, air is compressed, freed of impurities which will freeze out at cryogenic temperatures, cooled to near its dew point and fractionated in the distillation column system to produce the nitrogen product.The improvement is the operation of the distillation column such that the ratio of downward liquid to upward vapor flow rate (L/V) is no less than 0.65, preferably greater than 0.75, but less than 1.0 in the rectifying section of a distillation column from which the nitrogen product is produced. The flowrates are in moles per unit time.
摘要翻译： 本发明涉及一种用于分离产生至少氮产物的空气的低温方法的改进，并且在具有至少一个蒸馏塔的蒸馏塔系统中进行，所述蒸馏塔从其中产生氮产物。 蒸馏塔系统的蒸馏塔必须包括整流段。 在本发明的方法中，空气被压缩，不含将在低温下冷冻的杂质，冷却至接近露点并在蒸馏塔系统中分馏以产生氮产物。 改进是蒸馏塔的操作，使得在蒸馏塔的精馏段中向下液体与向上蒸气流量（L / V）的比例不小于0.65，优选大于0.75，但小于1.0， 氮产品生产。 流量以每单位时间的摩尔数计。
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公开(公告)号：US5275004A
公开(公告)日：1994-01-04
申请号：US918477
申请日：1992-07-21
CPC分类号： F25J3/04236 , F25J3/04284 , F25J3/04321 , F25J3/044 , F25J3/04412 , F25J3/04872 , F25J2200/72 , F25J2205/02 , Y10S62/903
摘要： The present invention relates to the heat exchanger system in a process for the cryogenic distillation of air. In particular, the present invention is an improvement to the heat exchanger system to increase the operational efficiency of the process.
摘要翻译： 本发明涉及一种用于空气低温蒸馏的方法中的热交换器系统。 特别地，本发明是对热交换器系统的改进，以提高该方法的操作效率。
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公开(公告)号：US4702757A
公开(公告)日：1987-10-27
申请号：US898280
申请日：1986-08-20
申请人： William T. Kleinberg
发明人： William T. Kleinberg
CPC分类号： F25J3/04218 , F25J3/0409 , F25J3/04103 , F25J3/04206 , F25J3/04303 , F25J3/04418 , F25J3/0486 , F25J2200/54 , F25J2200/90 , F25J2215/50 , F25J2250/40 , F25J2250/50
摘要： In a process utilizing high and low pressure distillation columns for the production of an oxygen-enriched air product, feed air is fed to the main heat exchangers at two pressures. The high pressure feed air from the main exchanger used to supply refrigeration, by expanding a portion of the high pressure air prior to introducing that portion into an intermediate location in the low pressure column, and to vaporize the oxygen-enriched air product prior to using the stream as reflux for the high pressure column. The low pressure feed air from the main heat exchangers is partially condensed to supply reboiler duty to a low pressure column and is then fed to a high pressure column. The high pressure column condenser is used to reboil an intermediate liquid in the low pressure column.
摘要翻译： 在利用高压和低压蒸馏塔生产富氧空气产物的方法中，在两个压力下将进料空气送入主热交换器。 来自主交换器的高压进料空气用于通过在将该部分引入低压塔的中间位置之前膨胀一部分高压空气并在使用之前蒸发富氧空气产品来供应制冷 该流作为高压塔的回流。 来自主热交换器的低压进料空气被部分冷凝，以向低压塔提供再沸器负荷，然后进料到高压塔。 高压塔冷凝器用于重新沸腾低压塔中的中间液体。
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4.发明授权Inert gas purifier for bulk nitrogen without the use of hydrogen or other reducing gases 失效不使用氢气或其他还原气体的惰性气体净化器
公开(公告)号：US4869883A
公开(公告)日：1989-09-26
申请号：US211484
申请日：1988-06-24
CPC分类号： C01B23/00 , B01D53/04 , C01B21/0494 , B01D2253/10 , B01D2253/112 , B01D2256/10 , B01D2257/504 , B01D2257/80 , B01D2259/40086 , C01B2210/0004 , C01B2210/0006 , C01B2210/0045 , C01B2210/005 , C01B2210/0053 , Y02C10/08 , Y02P20/152
摘要： The present invention relates to a three stage process using copper, copper oxide and molecular sieve adsorbent beds for the sequential removal of oxygen, hydrogen, carbon monoxide, carbon dioxide and water from an inert feed gas. The process is especially suited to the purification of nitrogen gas from an air separation plant, which can be purified from a contaminant level of 30 vppm oxygen+carbon monoxide+hydrogen to less than 10 vppb each of oxygen, carbon monoxide, hydrogen, carbon dioxide and water, without the addition of hydrogen or another reducing gas to the process.
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5.发明授权Integrated adsorption/cryogenic distillation process for the separation of an air feed 失效用于分离空气进料的集成吸附/低温蒸馏方法
公开(公告)号：US5463869A
公开(公告)日：1995-11-07
申请号：US289462
申请日：1994-08-12
申请人： Ravi Kumar , William T. Kleinberg
发明人： Ravi Kumar , William T. Kleinberg
IPC分类号： B01D53/047 , F25J3/04 , F25J3/02
CPC分类号： B01D53/0476 , F25J3/04163 , F25J3/04181 , F25J3/04284 , F25J3/04315 , F25J3/04375 , F25J3/044 , F25J3/04412 , B01D2257/504 , B01D2257/80 , B01D2259/40001 , B01D2259/4006 , B01D2259/40062 , B01D2259/416 , F25J2200/72 , F25J2205/80 , F25J2290/12 , Y02C10/08 , Y10S62/908
摘要： An integrated adsorption/cryogenic distillation process is set forth for the separation of an air feed. The air feed is passed through a vacuum swing adsorption (VSA) unit to remove impurities comprising water and carbon dioxide which will freeze out at cryogenic temperatures. The VSA sequence includes an adsorbent regeneration step whereby the impurity-saturated adsorbent is purged under vacuum with a purge gas. The resulting impurity-depleted air feed is fed to a cryogenic distillation column for rectification into a gaseous nitrogen overhead and a liquid oxygen bottoms. A waste stream from the distillation column is expanded, warmed against the impurity-depleted air feed to recover its refrigeration and subsequently recycled as the purge gas to the VSA unit. A key to the present invention is that the waste stream is expanded to the required sub-ambient pressure level in the cryogenic portion of the process. This enables one to recover all of the available refrigeration from the cryogenic waste stream prior to using such waste stream as the purge gas for the adsorption portion of the process.
摘要翻译： 提出了一种用于分离空气进料的综合吸附/低温蒸馏方法。 空气进料通过真空挥发吸附（VSA）装置以除去包含水和二氧化碳的杂质，这些杂质将在低温下冻结。 VSA序列包括吸附剂再生步骤，其中杂质饱和吸附剂在真空下用吹扫气体吹扫。 将所得杂质贫化的空气进料加入到低温蒸馏塔中，以精馏成气态氮塔顶馏出物和液氧底物。 来自蒸馏塔的废物流膨胀，对杂质贫化的空气进料进行加热，以恢复其冷冻，随后作为净化气体再循环至VSA装置。 本发明的关键是废物流在该过程的低温部分中膨胀至所需的亚环境压力水平。 这使得能够在使用这种废物流作为过程的吸附部分的吹扫气体之前从低温废物流中回收所有可用的制冷。
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公开(公告)号：US5165244A
公开(公告)日：1992-11-24
申请号：US699879
申请日：1991-05-14
IPC分类号： F25J3/04
CPC分类号： F25J3/04236 , F25J3/0409 , F25J3/04103 , F25J3/0423 , F25J3/04315 , F25J3/04412 , F25J2200/20 , F25J2245/42
摘要： The present invention is an improvement to a process for the separation of air into its constituent components in a cryogenic distillation column system having a high pressure column and a low pressure column which are thermally integrated with each other. The improvement for producing both nitrogen and oxygen products at a medium pressure comprises the following steps: (a) operating the low pressure column at a pressure of between 10 to 75 psig and the high pressure column at a pressure which is about 60 to 160 psi higher than the low pressure column; (b) removing and subsequently warming at least a portion of the lower pressure nitrogen overhead from the top of the low pressure column and recovering the warmed, lower pressure nitrogen overhead portion as medium pressure gaseous nitrogen product; and (c) recovering medium pressure gaseous oxygen product from the low pressure column. There are two alternative ways to recover the medium pressure oxygen product of step (c). In the first, a portion of the liquid oxygen bottoms can be removed from the low pressure column and boosted in pressure, and then subsequently vaporized. This vaporized, boosted pressure, liquid oxygen is recovered as medium pressure gaseous oxygen product. In the second, a portion of the vaporized liquid oxygen bottoms is removed from the low pressure column and warmed. This warmed, vaporized liquid oxygen bottoms would be recovered as the medium pressure gaseous oxygen product.
摘要翻译： 本发明是对具有彼此热结合的高压塔和低压塔的低温蒸馏塔系统中的空气分离成其组成成分的方法的改进。 在中压下生产氮和氧产品的改进包括以下步骤：（a）在10至75psig的压力和高压塔之间以约60至160psi的压力操作低压塔 高于低压塔; （b）从低压塔的顶部除去并随后升温至少一部分低压氮塔顶，并回收加热的低压氮塔顶部分作为中压气态氮产物; 和（c）从低压塔回收中压气态氧产物。 回收步骤（c）的中压氧产物有两种替代方法。 首先，一部分液氧底部物质可以从低压塔中除去并在压力下升压，随后蒸发。 这种气化的增压压力，作为中压气态氧产物回收液氧。 在第二部分中，蒸发的液氧底部的一部分从低压塔中除去并加热。 这种温热的蒸发的液氧底部物质将作为中压气态氧产物回收。
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公开(公告)号：US4704148A
公开(公告)日：1987-11-03
申请号：US898282
申请日：1986-08-20
申请人： William T. Kleinberg
发明人： William T. Kleinberg
CPC分类号： F25J3/042 , F25J3/04206 , F25J3/04303 , F25J3/04418 , F25J2200/54 , F25J2205/02 , F25J2245/40 , F25J2245/50 , F25J2250/40 , F25J2250/50 , Y10S62/939
摘要： In a process, utilizing high and low pressure distillation columns, for the separation of air to produce low purity oxygen and waste nitrogen streams, feed air from the cold end of the main heat exchangers is used to reboil a low pressure distillation column and to vaporize the low purity oxygen product. This heat duty for column reboil and product vaporization is supplied by splitting the air feed into at least three substreams. One of the substreams is totally condensed and used to provide reflux to both the low pressure and high pressure distillation column, preferably the substream which is fed to the oxygen vaporizer, while a second substream is partially condensed with the vapor portion of the partially condensed substream being fed to the bottom of the high pressure distillation column and the liquid portion providing reflux to the low pressure column. The third substream is expanded to recover refrigeration and then introduced to the low pressure column as column feed. Additionally, the high pressure column condenser is used as an intermediate reboiler in the low pressure column.
摘要翻译： 在一个过程中，利用高压和低压蒸馏塔，用于分离空气以产生低纯度氧气和废氮气流，使用主热交换器的冷端进料空气将低压蒸馏塔再沸腾并汽化 低纯氧产品。 通过将空气进料分成至少三个子流来提供塔再沸器和产物蒸发的这种热负荷。 其中一个子流完全冷凝并用于向低压和高压蒸馏塔提供回流，优选为进料到氧蒸发器的子流，而第二子流与部分冷凝的子流的蒸汽部分部分冷凝 进料到高压蒸馏塔的底部，液体部分提供回流到低压塔。 将第三子流扩张以回收制冷，然后作为柱进料引入低压塔。 此外，高压塔冷凝器用作低压塔中的中间再沸器。
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公开(公告)号：US4704147A
公开(公告)日：1987-11-03
申请号：US898281
申请日：1986-08-20
申请人： William T. Kleinberg
发明人： William T. Kleinberg
CPC分类号： F25J3/04218 , F25J3/0409 , F25J3/04206 , F25J3/04303 , F25J3/04412 , F25J2205/02 , F25J2250/40 , F25J2250/50
摘要： In a process for the production of an oxygen-enriched air product, feed air is fed to the main heat exchangers at two pressures. The high pressure feed air from the main exchanger is partially condensed to vaporize the oxygen-enriched air product. This partially condensed feed air is separated with the vapor phase being warmed and expanded to supply refrigeration and subsequently being fed to the low pressure fractionation section, and the liquid phase being used to reflux both the high pressure and low pressure fractionation sections of a double distillation column. The low pressure feed air from the main heat exchangers is fed to the high pressure fractionation section. The high pressure fractionation section condenser is used to provide reboiler duty to the low pressure fractionation section.
摘要翻译： 在生产富氧空气产品的方法中，进料空气在两个压力下被供给至主热交换器。 来自主交换器的高压进料空气被部分冷凝以蒸发富氧空气产物。 这种部分冷凝的进料空气被分离，气相被加热和膨胀以提供制冷，随后被供给到低压分馏段，并且液相用于回流双蒸馏的高压和低压分馏段 柱。 来自主热交换器的低压进料空气被供给至高压分馏部。 高压分馏段冷凝器用于向低压分馏段提供再沸器负荷。
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