Downflow shell and tube reboiler-condenser heat exchanger for cryogenic
rectification
    3.
    发明授权
    Downflow shell and tube reboiler-condenser heat exchanger for cryogenic rectification 失效
    用于低温整流的下流式壳管式再沸器 - 冷凝器换热器

    公开(公告)号:US5699671A

    公开(公告)日:1997-12-23

    申请号:US584938

    申请日:1996-01-17

    摘要: The invention comprises a downflow shell and tube condenser, especially useful for cryogenic rectification, which includes a shell having an upper tube sheet and a lower tube sheet, the shell extending above the upper tube sheet to create a first reservoir. A plurality of heat transfer tubes extend between the upper tube sheet and the lower tube sheet and also pass through the lower tube sheet. Cold liquid entering the heat transfer tubes flows down through the tubes and causes a condensation of vapor that is in contact therewith within the shell. The cold liquid is at least partially vaporized and exits from the lowermost ends of the heat transfer tubes.

    摘要翻译: 本发明包括一种特别适用于低温精馏的下流式壳管冷凝器,其包括具有上管板和下管板的壳体,壳体在上管板上延伸以形成第一储存器。 多个传热管在上管片和下管片之间延伸并且还穿过下管片。 进入传热管的冷液体向下流动通过管并使壳体内与其接触的蒸气冷凝。 冷液体至少部分蒸发并从传热管的最下端排出。

    Oxygen separation method using a ceramic membrane unit
    7.
    发明授权
    Oxygen separation method using a ceramic membrane unit 失效
    氧分离法采用陶瓷膜单元

    公开(公告)号:US06623714B2

    公开(公告)日:2003-09-23

    申请号:US09871956

    申请日:2001-06-04

    IPC分类号: B01D5322

    摘要: A method of separating oxygen using a ceramic membrane unit having one or more ceramic membranes, preferably formed of a mixed conducting ceramic, for instance, a perovskite, capable of conducting both oxygen ions and electrons. Oxygen is separated within the ceramic membrane unit under impetus of compressing an incoming oxygen containing feed. The compressor used in the compression is powered by the work of expansion produced by expanding a process stream composed of at least a portion of the retentate produced in the ceramic membrane unit. Prior to expansion, the process stream is cooled to allow the use of less expensive materials in expanders used in the expansion. As a result, expansion of the process stream alone is insufficient to meet the power requirements involved in the compression. Interstage expansion with reheating is used to make up for the power deficit.

    摘要翻译: 使用具有一个或多个陶瓷膜的陶瓷膜单元的分离方法,该陶瓷膜优选由能够导电氧离子和电子的混合导电陶瓷,例如钙钛矿形成。 在压缩进入含氧进料的动力下,陶瓷膜单元内的氧气分离。 在压缩机中使用的压缩机由通过膨胀由陶瓷膜单元中产生的至少一部分滞留物组成的工艺流而产生的膨胀作用来提供动力。 在膨胀之前,将工艺流冷却以允许在膨胀器中使用的膨胀器中使用较便宜的材料。 因此,单独的工艺流的扩展不足以满足压缩中涉及的功率要求。 再加热阶段的扩张用来弥补电力赤字。