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    Separation of fluid mixtures in multiple distillation columns
    82.
    发明公开
    Separation of fluid mixtures in multiple distillation columns 失效
    Mehrfachkolonnen的Trennung von Stoffgemischen

    公开(公告)号：EP0722758A2

    公开(公告)日：1996-07-24

    申请号：EP96300377.7

    申请日：1996-01-19

    申请人： AIR PRODUCTS AND CHEMICALS, INC.

    发明人： Agrawal, Rakesh ,  Xu, Jianguo

    IPC分类号： B01D3/14

    CPC分类号： F25J3/04606 ,  B01D3/146 ,  F01K23/068 ,  F02C6/10 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J3/04303 ,  F25J3/04448 ,  F25J3/04575 ,  F25J3/046 ,  F25J3/04872 ,  F25J2200/04 ,  F25J2200/20 ,  F25J2200/50 ,  F25J2200/54 ,  F25J2235/02 ,  F25J2290/10 ,  F25J2290/40 ,  Y02E20/18 ,  Y10S62/915

    摘要： A fluid mixture is separated by distillation in which the feed (101) is prefractionated in a first column (103) having at least one separation stage (105) above or below the feed (101). When the separation stage (105) is above the feed (101), the prefractionator bottoms (125) provides feed to a second distillation column (109) operating at a lower pressure.
    When the separation stage is below the feed (101), a portion of condensed prefractionator overhead is pressurized and provides feed to a second distillation column. In both cases, no temperature in the first column (103) is greater than the highest temperature or less than the lowest temperature in the second column (109).
    The two-column system is readily combined with a high pressure column in a three-column distillation system for separating air, which is particularly useful for integration with a gasification combined cycle combustion turbine system.

    摘要翻译： 分离流体混合物的方法 至少一种更易挥发的组分和至少一种较不易挥发的组分，其包括将作为第一进料流的第一压力的流体混合物引入具有至少一个sepn的第一蒸馏塔。 并且提取第一塔顶蒸气和第一塔底液。 将第一底部液体闪蒸至第二压力，然后进料至第二蒸馏塔。 收集富含较易挥发组分的第二塔顶蒸气和富含较不易挥发组分的第二底部液体。 第一塔顶蒸气的至少一部分被冷凝，并且所得到的第一冷凝物的至少一部分作为回流返回到第一塔。 用于冷凝第一塔顶蒸气的冷却负荷通过与（1）在第二塔的中间点处的流体间接热交换或（2）在第二蒸馏塔之前的所得闪蒸的第一塔底物流的至少一部分进行间接热交换 。 无论是温度 在第一列的底部等于温度。 在第二列的底部和温度。 在第一列中的任何其他点处于最高和最低温度之间。 在第二列或临时 在第一列中的任何一点处于最高和最低温度之间。 在第二列。 两个塔顶蒸气的组合摩尔流速大于第一进料流的摩尔流速的50％。

    Efficient single column air separation cycle and its integration with gas turbines
    87.
    发明公开
    Efficient single column air separation cycle and its integration with gas turbines 无效
    Einsaulenluftzerlegungszyklus und seine集成在Gasturbinen。

    公开(公告)号：EP0584420A1

    公开(公告)日：1994-03-02

    申请号：EP92311269.2

    申请日：1992-12-10

    申请人： AIR PRODUCTS AND CHEMICALS, INC.

    发明人： Agrawal, Rakesh ,  Xu, Jianguo

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04236 ,  F25J3/042 ,  F25J3/04296 ,  F25J3/04309 ,  F25J3/04351 ,  F25J3/04363 ,  F25J3/04393 ,  F25J3/044 ,  F25J3/04545 ,  F25J3/04557 ,  F25J3/04575 ,  F25J3/046 ,  F25J3/04618 ,  F25J2200/50 ,  F25J2200/72 ,  F25J2205/02 ,  F25J2235/02 ,  Y10S62/915 ,  Y10S62/939

    摘要： The cryogenic distillation of air in a single distillation column system is improved by (a) operating the column (152) at a pressure between 70 and 300 psia (0.5 and 2 MPa); (b) withdrawing a portion (160) of the liquid oxygen bottoms having an oxygen concentration greater than 80% oxygen from the bottom of the column and reducing the pressure of and vaporizing the withdrawn liquid oxygen by heat exchange (164) against a condensing nitrogen stream (182) removed from a top section of the column; (c) feeding the condensed, nitrogen stream (184) to a top section of the column (152) as reflux; and (d) recovering the vaporized oxygen (168) as at least a substantial portion of the oxygen product. Preferably boilup is provided by boiling at least another portion of the liquid oxygen bottoms by heat exchange (142) against (a) an air stream (141) at a higher pressure than the feed air stream or (b) a recycle nitrogen stream (140) at a pressure greater than the operating pressure of the column, or by recycling a portion of the oxygen product (168) at a pressure of at least the operating pressure of the column to the bottom thereof and/or by providing intermediate boilup to the stripping section of the column by vaporizing a portion of descending column liquid by heat exchange (264) against either an air stream (141) at a higher pressure than the feed air stream or a recycle nitrogen stream (203) at a pressure greater than the operating pressure of the column.

    摘要翻译： 通过（a）在70-300psia（0.5和2MPa）之间的压力下操作塔（152）来改善单个蒸馏塔系统中的空气的低温蒸馏; （b）从所述塔的底部排出氧浓度大于80％的氧气底部的一部分（160），并通过与冷凝氮（164）热交换（164）降低所述抽出的液氧的压力和汽化 从塔的顶部除去的料流（182） （c）将冷凝的氮气流（184）作为回流供给到塔（152）的顶部部分; 和（d）作为氧产物的至少大部分回收蒸发的氧（168）。 优选地，通过在比进料空气流更高的压力下对（a）空气流（141）进行热交换（142）来沸腾至少另一部分液氧塔底，或（b）循环氮气流（140） ），或者通过在塔的至少工作压力至少其压力下将氧产物（168）的一部分再循环到其底部和/或通过向所述塔的底部提供中间沸腾 通过以比进料空气流或再循环氮气流（203）更高的压力对空气流（141）进行热交换（264）蒸发一部分下行塔液体，该压力大于 柱的工作压力。

    Improved cryogenic distallation process for the production of oxygen and nitrogen
    89.
    发明公开
    Improved cryogenic distallation process for the production of oxygen and nitrogen 失效
    Kryogenisches Destillationsverfahren zur Herstellung von Sauerstoff und Stickstoff。

    公开(公告)号：EP0538118A1

    公开(公告)日：1993-04-21

    申请号：EP92402800.4

    申请日：1992-10-14

    申请人： LIQUID AIR ENGINEERING CORPORATION

    发明人： Ha, Bao

    IPC分类号： F25J3/04 ,  F02C6/10

    CPC分类号： F25J3/046 ,  F02C6/10 ,  F25J3/04303 ,  F25J3/04448 ,  F25J3/04575 ,  F25J3/04606 ,  F25J3/04872 ,  F25J2200/20 ,  F25J2200/50 ,  F25J2200/54 ,  F25J2215/50 ,  Y10S62/915 ,  Y10S62/939

    摘要： 1. A cryogenic distillation process for the production of oxygen and nitrogen, which comprises:

    a) cooling at least a fraction of a cleaned and dried feed stream (10) containing at least oxygen and nitrogen and introducing the same into a high pressure column (13), and separating the same into nitrogen-rich stream at the top of the column and an oxygen-rich stream at the bottom of the column, wherein the overhead of the high pressure column exchanges heat with both the bottom of the low pressure column (19) and the bottom of an intermediate column (28),
    b) introducing at least a fraction of the oxygen-rich stream (2) into said intermediate column to afford a top liquid fraction A (32) and a bottom liquid fraction B (21), the overhead of the intermediate column exchanging heat (29) with the low pressure column at a location above the bottom reboiler (30) of the low pressure column, wherein the pressure of the intermediate column is lower than the high pressure column but higher than the low pressure column,
    c) introducing at least a fraction of the liquid fractions A and B into the low pressure column as feed,
    d) feeding at least a fraction of the nitrogen-rich stream (22) of step b) to the low pressure column as reflux, and
    e) recovering an oxygen-rich stream (25) product at the bottom of the low pressure column and a nitrogen-rich stream (24) at the top of the low pressure column.

    摘要翻译： 1.一种用于生产氧气和氮气的低温蒸馏方法，其包括：a）冷却至少含有至少氧和氮的清洁和干燥的进料流（10）的至少一部分并将其引入高压塔（ 13），并将其分离成塔顶部的富氮物流和塔底部的富氧物流，其中高压塔的塔顶馏出物与低压塔的底部两者交换热量 （19）和中间塔（28）的底部，b）将至少一部分富氧流（2）引入所述中间塔中以得到顶部液体馏分A（32）和底部液体馏分B （21），中间塔与低压塔的底部再沸器（30）上方的位置与低压塔交换热（29）的塔顶，其中中间塔的压力低于高压塔 但高于 低压塔，c）将至少一部分液体级分A和B引入低压塔作为进料，d）将至少一部分步骤b）的富氮流（22）进料至低压 塔作为回流，以及e）在低压塔的底部回收富氧流（25）产物和在低压塔顶部的富氮流（24）。

    Air Separation
    90.
    发明公开
    Air Separation 失效
    空气分离

    公开(公告)号：EP0357299A1

    公开(公告)日：1990-03-07

    申请号：EP89308364.2

    申请日：1989-08-17

    申请人： The BOC Group plc

    发明人： Rathbone, Thomas

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04206 ,  F25J3/0409 ,  F25J3/04303 ,  F25J3/04351 ,  F25J3/04357 ,  F25J3/04424 ,  F25J3/04545 ,  F25J3/04575 ,  F25J3/04581 ,  F25J3/046 ,  F25J3/04618 ,  F25J2200/20 ,  F25J2215/50 ,  F25J2230/06 ,  F25J2235/42 ,  F25J2245/42 ,  F25J2250/40 ,  F25J2250/42 ,  F25J2250/50 ,  F25J2250/52 ,  Y10S62/915

    摘要： Air which has had water vapour and carbon dioxide removed therefrom is introduced at about its dew point into a higher pressure distillation column 4 through an inlet 8, and is separated into oxygen-rich and nitrogen-rich fractions. A stream of oxygen-enriched liquid is withdrawn from the higher pressure column 4 through an outlet 18 and is introduced into a lower pressure distillation column 6 in which it is separated into oxygen and nitrogen. Nitrogen gas is taken from an outlet 32 at the top of the lower pressure column 6 and is employed in a heat pump cycle in which it is compressed in compressor 34, cooled in heat exchanger 2, condensed in reboiler 26 to provide reboil for the column 6, and returned to the top of the column 6 as reflux. A part of the liquid nitrogen stream leaving the reboiler 26 is diverted from the flow to the top of the column 6 and is pumped into the top of the column 4 as reflux. The operating pressures of the columns 4 and 6 are thus able to be set independently of one another.

    摘要翻译： 已经从其中除去水蒸气和二氧化碳的空气在大约其露点处通过入口8被引入到高压蒸馏塔4中，并被分离成富氧和富氮馏分。 富氧液体流通过出口18从高压塔4中排出，并被引入低压蒸馏塔6中，在塔6中被分离成氧气和氮气。 从低压塔6顶部的出口32取出氮气，并将其用于热泵循环，其中它在压缩机34中被压缩，在热交换器2中冷却，在再沸器26中冷凝，为塔提供再沸腾 6，并作为回流返回到塔6的顶部。 离开再沸器26的液氮流的一部分从流体转移到塔6的顶部并作为回流泵送到塔4的顶部。 柱4和6的操作压力因此能够彼此独立地设定。