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公开(公告)号：US3967464A
公开(公告)日：1976-07-06
申请号：US490639
申请日：1974-07-22
CPC分类号： F25J3/04169 , F25J3/04309 , F25J3/04412 , F25J3/04854 , F25J3/0486 , F25J2205/04 , F25J2205/24 , F25J2205/60 , F25J2250/50 , F25J2250/52
摘要： A cryogenic air separation system is described in which pressure-swing adsorption driers are used to remove virtually all of the moisture from the feed air prior to the passage of the feed air stream through reversing heat exchangers which remove the carbon dioxide. The reversing heat exchangers are regenerated by at least one outgoing product nitrogen stream, while the adsorption driers are regenerated by all or a portion of a low pressure stream withdrawn from the low pressure column the composition of which may be rich in either nitrogen or oxygen depending upon whether the volume of product nitrogen or oxygen is to be maximized. A portion of this low pressure stream may be recovered as a dry product stream, while an additional stream of high purity product oxygen may also be recovered.
摘要翻译： 描述了一种低温空气分离系统，其中使用变压吸附式干燥器来在进料空气流通过反向换热器之前将几乎所有来自进料空气的水分除去，这些换热器除去了二氧化碳。 反向热交换器通过至少一个输出产物氮气流再生，而吸附干燥器由从低压塔排出的全部或部分低压流再生，其组成可以富含氮或氧，取决于 关于产品氮或氧的体积是否最大化。 该低压流的一部分可以作为干燥产物流回收，而另外还可以回收高纯度产物氧气流。
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公开(公告)号：US4662917A
公开(公告)日：1987-05-05
申请号：US869143
申请日：1986-05-30
CPC分类号： F25J3/042 , F25J3/04157 , F25J3/04193 , F25J3/04296 , F25J3/04351 , F25J3/044 , F25J3/04618 , F25J2200/50 , F25J2200/72 , F25J2200/76 , F25J2240/44
摘要： A process is set forth for the separation of air by cryogenic distillation in a single column to produce a nitrogen product and an oxygen-enriched product. In the process, at least a portion of the nitrogen product is compressed and recycled to provide reboil at the bottom of the distillation column and to provide some additional reflux to the upper portion of the column. In addition, part of the compressed air stream is expanded to provide work, which is used to drive an auxiliary compressor for recycle nitrogen stream compression.
摘要翻译： 阐述了通过在单一柱中的低温蒸馏来分离空气以产生氮产物和富氧产物的方法。 在此过程中，氮气产物的至少一部分被压缩并再循环，以在蒸馏塔的底部提供再沸腾，并向柱的上部提供一些额外的回流。 另外，部分压缩空气流被膨胀以提供工作，其用于驱动用于再循环氮气流压缩的辅助压缩机。
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公开(公告)号：US4662916A
公开(公告)日：1987-05-05
申请号：US869142
申请日：1986-05-30
CPC分类号： F25J3/042 , F25J3/04157 , F25J3/04169 , F25J3/04296 , F25J3/04351 , F25J3/044 , F25J3/04618 , F25J2200/50 , F25J2205/62 , F25J2245/40 , Y10S62/939
摘要： A process is set forth for the separation of air by cryogenic distillation in a single column to produce a nitrogen product and an oxygen-enriched product. In the process, at least a portion of the nitrogen product is compressed and recycled to provide reboil at the bottom of the distillation column and to provide some additional reflux to the upper portion of the column. In addition, part of the compressed feed air stream is expanded to provide work, which is used to drive an auxiliary compressor for feed air substream compression.
摘要翻译： 阐述了通过在单一柱中的低温蒸馏来分离空气以产生氮产物和富氧产物的方法。 在此过程中，氮气产物的至少一部分被压缩并再循环，以在蒸馏塔的底部提供再沸腾，并向柱的上部提供一些额外的回流。 此外，部分压缩的进料空气流被膨胀以提供工作，其用于驱动用于进料空气分流压缩的辅助压缩机。
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公开(公告)号：US4615716A
公开(公告)日：1986-10-07
申请号：US769929
申请日：1985-08-27
CPC分类号： F25J3/04224 , F25J3/0423 , F25J3/04333 , F25J3/04412 , F25J3/04678 , F25J2200/90 , F25J2250/20 , F25J2270/02 , Y10S62/912
摘要： A method of oxygen recycle on the bottom section of the low-pressure column of a dual-pressure column, with an increase in the bottom section reboil vapor rate, allows an appreciable increase in the production rate of ultra high purity oxygen and a substantial decrease in power required as compared to conventional processes.
摘要翻译： 在双压力塔的低压塔的底部部分的氧再循环方法，随着底部部分再沸器蒸气速率的增加，可以显着提高超高纯度氧气的生产率，并显着降低 所需功率与传统工艺相比。
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公开(公告)号：US4400188A
公开(公告)日：1983-08-23
申请号：US315683
申请日：1981-10-27
CPC分类号： F25J3/04242 , F25J3/04193 , F25J3/042 , F25J3/04224 , F25J3/04284 , F25J3/04351 , F25J3/044 , F25J2200/50 , F25J2200/72 , F25J2200/76 , F25J2205/24 , F25J2220/52
摘要： A process is described in which gaseous nitrogen is recovered from air in a cryogenic air separation unit containing a single distillation column wherein the product nitrogen is compressed and a portion of the compressed nitrogen is recycled to the column to provide reboil in the bottom of said column and reflux at the top of said column. A waste crude oxygen stream is expanded to provide refrigeration for the air separation unit.
摘要翻译： 描述了一种方法，其中在含有单个蒸馏塔的低温空气分离单元中从空气中回收气态氮，其中产物氮被压缩，并且一部分压缩的氮被再循环到塔中以在所述塔的底部提供再沸腾 并在所述塔的顶部回流。 废弃的粗氧气流被膨胀以为空气分离单元提供制冷。
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6.发明授权
公开(公告)号：US5049173A
公开(公告)日：1991-09-17
申请号：US490017
申请日：1990-03-06
IPC分类号： F25J3/04
CPC分类号： F25J3/04709 , F25J3/04284 , F25J3/04303 , F25J3/04321 , F25J3/04412 , F25J3/0443 , F25J3/04454 , F25J3/04715 , F25J3/04872 , F25J3/04878 , F25J2200/06 , F25J2200/32 , F25J2200/34 , F25J2200/50 , F25J2200/90 , F25J2205/02 , F25J2215/50 , F25J2215/56 , F25J2245/02 , F25J2245/58 , F25J2250/20 , Y10S62/924 , Y10S62/939
摘要： The present invention relates to an improvement for the production of ultra-high purity oxygen from cryogenic air separation processes which produce nitrogen and/or commercial purity oxygen products. In particular, the improvement comprises removing or producing an oxygen-containing but heavy contaminant-lean (free, stream from one of the distillation columns of a single or multiple column cryogenic air separation facility and further stripping the removed or produced oxygen-containing stream in a fractionator to produce ultra-high purity oxygen (i.e., contaminant concentration
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公开(公告)号：US4662918A
公开(公告)日：1987-05-05
申请号：US869144
申请日：1986-05-30
CPC分类号： F25J3/042 , F25J3/04351 , F25J3/04357 , F25J3/044 , F25J2200/50 , F25J2200/72 , F25J2200/76
摘要： A process is set forth for the separation of air by cryogenic distillation in a single column to produce a nitrogen product and an oxygen-enriched product. In the process, at least a portion of the nitrogen product is compressed and recycled to provide reboil at the bottom of the distillation column and to provide some additional reflux to the upper portion of the column. In addition, part of the compressed nitrogen recycle stream is expanded to provide work.
摘要翻译： 阐述了通过在单一柱中的低温蒸馏来分离空气以产生氮产物和富氧产物的方法。 在此过程中，氮气产物的至少一部分被压缩并再循环，以在蒸馏塔的底部提供再沸腾，并向柱的上部提供一些额外的回流。 另外，部分压缩的氮气循环流被扩大以提供工作。
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公开(公告)号：US4464188A
公开(公告)日：1984-08-07
申请号：US536426
申请日：1983-09-27
申请人： Rakesh Agrawal , Thomas E. Cormier
发明人： Rakesh Agrawal , Thomas E. Cormier
CPC分类号： F25J3/044 , F25J3/04357 , F25J2200/50 , F25J2200/72 , Y10S62/939
摘要： A process and apparatus is set forth for the separation of air by cryogenic distillation in a rectification column using two nitrogen recycle streams and a sidestream of the feed air stream to reboil the column. One of the nitrogen recycle streams is expanded to provide refrigeration and to provide power to compress the feed air sidestream.
摘要翻译： 提出了一种方法和装置，用于通过使用两个氮气再循环流和进料空气流的侧流在精馏塔中通过低温蒸馏分离空气以再沸腾塔。 氮气再循环流中的一个被膨胀以提供制冷并提供动力来压缩进料空气侧流。
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9.发明授权Use of liquefied natural gas (LNG) coupled with a cold expander to produce liquid nitrogen 失效使用与冷膨胀器相连的液化天然气（LNG）产生液氮
公开(公告)号：US5141543A
公开(公告)日：1992-08-25
申请号：US691773
申请日：1991-04-26
CPC分类号： F25J3/04351 , F17C9/04 , F25J1/0015 , F25J1/0037 , F25J1/004 , F25J1/0042 , F25J1/0224 , F25J1/0234 , F25J1/0292 , F25J3/0406 , F25J3/0409 , F25J3/04224 , F25J3/04266 , F25J3/04387 , F17C2221/033 , F17C2223/0161 , F17C2223/033 , F17C2225/0123 , F17C2227/0309 , F17C2265/05 , F25J2210/50 , F25J2210/62 , F25J2230/08 , F25J2230/42 , F25J2240/12 , F25J2245/42 , F25J2245/90
摘要： The present invention relates to a process for the liquefaction of a nitrogen stream produced by separating air components, by using the combination of cryogenic distillation with improved refrigeration. Very cold liquefied natural gas (LNG) is employed as refrigerant, with the LNG currently being revaporized for transportation.Multi-stage component compression is used, with the component feed to each compression stage being precooled using sequential refrigeration from the LNG. Expander means for the coldest air component product stream provides supplemental refrigeration at the cold end beyond that which is available from the refrigerant LNG.In a preferred embodiment, the feed nitrogen stream(s) are compressed to at least 300 psi in a multi-stage compressor with interstage cooling provided by heat exchange against vaporizing LNG; the resulting compressed stream is directed into first and second nitrogen substreams, followed by further cooling of the first substream by heat exchange against vaporizing LNG and then expanding the cooled first substream to produce an expanded nitrogen substream. Condensing of the second compressed substream against both vaporizing LNG and the expanded nitrogen substream is carried out. Reducing the pressure of the condensed second nitrogen substream produces a two phase nitrogen stream. Phase separation yields a recyclable nitrogen vapor stream and a liquid nitrogen stream as product.
摘要翻译： 本发明涉及通过使用低温蒸馏与改进的制冷的组合分离空气组分而产生的氮气流的液化方法。 使用非常冷的液化天然气（LNG）作为制冷剂，目前LNG正在进行再蒸发运输。 使用多级部件压缩，使用来自LNG的顺序制冷将每个压缩级的分量进料预冷却。 用于最冷空气组分产物流的膨胀器意味着在冷端超过可从制冷剂LNG获得的冷却的补充制冷。 在一个优选的实施方案中，在多级压缩机中将进料氮气流压缩至至少300psi，其中通过与蒸发的LNG进行热交换而提供级间冷却; 将所得压缩流引导到第一和第二氮气流中，随后通过与汽化LNG的热交换进一步冷却第一子流，然后使冷却的第一子流扩展以产生膨胀的氮气流。 执行第二压缩子流对蒸发LNG和膨胀氮气流的冷凝。 减少浓缩的第二氮气流的压力产生两相氮气流。 相分离产生可回收的氮蒸汽流和液氮流作为产物。
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