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1.发明授权
公开(公告)号：US5839296A
公开(公告)日：1998-11-24
申请号：US925761
申请日：1997-09-09
CPC分类号： F25J3/04412 , F25J3/0409 , F25J3/04309 , F25J3/04315 , F25J3/04387 , F25J3/04393 , F25J3/04418 , F25J2200/20 , F25J2200/34 , F25J2200/52 , F25J2200/54 , F25J2215/52 , F25J2240/10
摘要： An improved efficiency system for producing low purity oxygen by rectification of air employs a high pressure column and a low pressure column and includes the steps of: turboexpanding a flow of nitrogen-rich gas from the high pressure column to provide a cooled nitrogen-rich gas flow; condensing the cooled nitrogen-rich gas flow to a nitrogen-rich liquid against a flow of a vaporizing oxygen-rich liquid flow taken from the low pressure column; passing the nitrogen-rich liquid as a reflux flow to the low pressure column; returning the vaporizing oxygen liquid to the low pressure column; and employing energy derived from the turboexpanding step to compress feed air.
摘要翻译： 通过空气精馏生产低纯度氧气的改进的效率系统采用高压塔和低压塔，包括以下步骤：从高压塔中涡轮膨胀富氮气体流，提供冷却的富氮气体 流; 将冷却的富氮气流冷凝至富氮液体，以抵抗从低压塔取出的汽化富氧液体流; 将富氮液体作为回流流通入低压塔; 将蒸发的氧气返回到低压塔; 并且使用来自涡轮膨胀步骤的能量来压缩进料空气。
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2.发明授权Cryogenic side column rectification system for producing low purity oxygen and high purity nitrogen 失效用于生产低纯氧和高纯度氮的低温侧柱精馏系统
公开(公告)号：US5664438A
公开(公告)日：1997-09-09
申请号：US689793
申请日：1996-08-13
IPC分类号： F25J3/04
CPC分类号： F25J3/04418 , F25J3/0409 , F25J3/04309 , F25J2200/34 , F25J2200/52 , F25J2200/54 , F25J2215/50 , Y10S62/90
摘要： A cryogenic rectification system for producing low purity oxygen and high purity nitrogen, preferably at elevated pressure, wherein nitrogen-rich vapor from a higher pressure column is turboexpanded and condensed against lower pressure column intermediate liquid prior to being passed into the lower pressure column and low purity oxygen is produced in an auxiliary side column driven by fluid from the higher pressure column.
摘要翻译： 一种用于生产低纯氧和高纯度氮的低温精馏系统，优选在升高的压力下，其中来自较高压力塔的富氮蒸汽在进入低压塔之前被涡轮膨胀和冷凝至低压塔中间液体，并且低 在由高压塔的流体驱动的辅助侧塔中产生纯氧。
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公开(公告)号：US5873264A
公开(公告)日：1999-02-23
申请号：US932965
申请日：1997-09-18
CPC分类号： F25J3/0409 , F25J3/04303 , F25J3/04418 , F25J2200/34 , F25J2200/54 , F25J2200/90 , F25J2215/50
摘要： A cryogenic rectification system for producing lower purity oxygen comprising a double column with a third column reboiled by feed air at an intermediate level and, optionally, in a staged manner at the bottom level.
摘要翻译： 一种用于生产低纯度氧的低温精馏系统，包括具有第三塔的双塔，其具有在中间水平的进料空气再沸腾，并且可选地以分级方式在底部水平。
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4.发明授权Cryogenic rectification system for producing low purity oxygen and high purity oxygen 失效用于生产低纯氧和高纯氧的低温精馏系统
公开(公告)号：US5806342A
公开(公告)日：1998-09-15
申请号：US950744
申请日：1997-10-15
CPC分类号： F25J3/04315 , F25J3/04418 , F25J2200/20 , F25J2200/54
摘要： A cryogenic rectification system for producing low purity oxygen and high purity oxygen employing an offset dual column with bottom reboil of the lower pressure column effected by condensing feed air, with intermediate reboil of the lower pressure column effected by condensing higher pressure column top vapor, and with waste nitrogen turboexpansion to generate refrigeration.
摘要翻译： 一种用于生产低纯度氧气和高纯度氧气的低温精馏系统，其采用偏压双重柱，低压塔的底部再沸器通过冷凝进料空气，通过冷凝较高压力的塔顶蒸气而进行的低压塔的中间再沸腾，以及 用废氮涡轮膨胀来产生制冷。
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5.发明授权Cryogenic rectification system for producing low purity oxygen and high purity nitrogen 失效用于生产低纯氧和高纯度氮的低温精馏系统
公开(公告)号：US5678427A
公开(公告)日：1997-10-21
申请号：US671053
申请日：1996-06-27
IPC分类号： F25J3/04
CPC分类号： F25J3/04175 , F25J3/0409 , F25J3/04206 , F25J3/04296 , F25J3/04309 , F25J3/04393 , F25J3/04412 , F25J3/04418 , F25J2200/34 , F25J2200/52 , F25J2200/54 , F25J2215/52 , F25J2250/40 , F25J2250/50
摘要： A double column cryogenic rectification system for producing low purity oxygen and high purity nitrogen, preferably at elevated pressure, wherein nitrogen-rich vapor from the higher pressure column is turboexpanded and condensed against lower pressure column intermediate liquid prior to being passed into the lower pressure column.
摘要翻译： 用于生产低纯度氧和高纯度氮的双塔低温精馏系统，优选在升高的压力下，其中来自高压塔的富氮蒸汽在进入低压塔之前被涡轮膨胀和冷凝至低压塔中间液体 。
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