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23 条记录 (耗时 0.027 秒)

    Use of membrane separation to dry gas streams containing water vapor
    3.
    发明授权
    Use of membrane separation to dry gas streams containing water vapor 失效
    使用膜分离干燥含有水蒸气的气流

    公开(公告)号：US5259869A

    公开(公告)日：1993-11-09

    申请号：US880177

    申请日：1992-05-06

    申请人： Steven R. Auvil ,  Jung S. Choe ,  Lyndon J. Kellogg, Jr.

    发明人： Steven R. Auvil ,  Jung S. Choe ,  Lyndon J. Kellogg, Jr.

    IPC分类号： B01D53/22 ,  B01D53/26 ,  B01D71/68

    CPC分类号： B01D53/22 ,  B01D53/268

    摘要： Valuable process gas is dried to a low water content, for example a dew point of less than -20.degree. F., using membrane separation in which compression of the permeate gases and condensation and separation of liquid water from the permeate stream is combined with a total recycle of uncondensable permeate gases so that no process gas is lost as a result of the drying operation. Feed gas is combined with the recycled gas either prior to compressing, cooling and separating the liquid water from the process gas or subsequent to these steps, depending upon the pressure of the available feed stream to be dried. Membrane separation efficiency is improved by sweeping the downstream surfaces of the membrane with dried product gas. All of the sweep gas is recaptured with the permeate gases and returned to the separation unit, thereby enabling 100%, recovery of the fresh feed gas from the drying operation. Only liquid water and dissolved gases are purged from the system.

    摘要翻译： 使用膜分离将有价值的工艺气体干燥至低水含量，例如露点低于-20°F，其中渗透气体的压缩和液体水从渗透物流的冷凝和分离与 不可渗透的渗透气体的总再循环，使得由于干燥操作而没有工艺气体损失。 在将压缩，冷却和从处理气体中分离出液态水之前或者在这些步骤之后，进料气体与循环气体组合，这取决于待干燥的可用进料流的压力。 通过用干燥的产品气体清洗膜的下游表面来提高膜分离效率。 所有的吹扫气体都与渗透气体一起回收并返回到分离单元，从而能够从干燥操作中回收100％的新鲜进料气体。 只有液体水和溶解的气体从系统中清除。

    Cryogenic process for producing low-purity oxygen
    7.
    发明授权
    Cryogenic process for producing low-purity oxygen 失效
    用于生产低纯氧的低温工艺

    公开(公告)号：US4947649A

    公开(公告)日：1990-08-14

    申请号：US337518

    申请日：1989-04-13

    申请人： Rakesh Agrawal ,  Steven R. Auvil

    发明人： Rakesh Agrawal ,  Steven R. Auvil

    IPC分类号： F25J3/04

    CPC分类号： F25J3/044 ,  F25J3/04193 ,  F25J3/042 ,  F25J3/04296 ,  F25J3/04351 ,  F25J2200/40 ,  F25J2200/76 ,  F25J2215/50 ,  F25J2250/20 ,  Y10S62/939

    摘要： This invention relates to an improved cryogenic separation process employing a single pressure distillation column for the recovery of low purity, high pressure oxygen. The process uses two working fluids, i.e., high pressure air and high pressure nitrogen to effect reboil in the column. Both the condensed air and nitrogen streams are fed as reflux streams to the distillation column. The use of nitrogen reflux enhances oxygen recovery by enhancing purity of the nitrogen from the column.

    摘要翻译： 本发明涉及采用单一压力蒸馏塔来回收低纯度高压氧气的改进的低温分离方法。 该方法使用两种工作流体，即高压空气和高压氮气以在塔中实现再沸腾。 冷凝的空气和氮气流都作为回流流进入蒸馏塔。 氮回流的使用通过提高柱的氮的纯度来提高氧气回收率。

    Process for the production of argon
    9.
    发明授权
    Process for the production of argon 失效
    氩气生产工艺

    公开(公告)号：US4817392A

    公开(公告)日：1989-04-04

    申请号：US79187

    申请日：1987-07-29

    申请人： Rakesh Agrawal ,  Steven R. Auvil ,  Jung S. Choe

    发明人： Rakesh Agrawal ,  Steven R. Auvil ,  Jung S. Choe

    IPC分类号： B01D53/22 ,  C01B23/00 ,  F25J3/04 ,  F25J3/00

    CPC分类号： B01D53/229 ,  C01B23/00 ,  F25J3/04648 ,  F25J2205/02 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/80 ,  F25J2205/82 ,  F25J2245/50

    摘要： The present invention is a process for the production and recovery of an O.sub.2 -lean argon stream from a gas mixture containing argon and oxygen. The argon-containing gas mixture is initially treated in a cryogenic separation unit to produce a crude argon stream having an argon concentration between 80-98%. The crude argon stream is passed to a membrane separation unit where it is separated to produce an O.sub.2 -lean argon stream and an O.sub.2 - rich stream. The O.sub.2 -rich stream is recycled tothe cryogenic separation unit and the O.sub.2 -lean argon stream is recovered as product or futher purified.

    摘要翻译： 本发明是一种从含有氩气和氧气的气体混合物生产和回收贫氧氩气流的方法。 首先在低温分离单元中处理含氩气体混合物以产生氩浓度在80-98％之间的粗氩气流。 将粗氩气流输送到膜分离单元，在其中分离，以产生贫氧的氩气流和富O2的气流。 将富O2的物流再循环到低温分离装置中，并将贫O2的氩气流作为产物回收或进一步纯化。