Air separation
    4.
    发明公开
    Air separation 失效
    空气分离

    公开(公告)号:EP0684437A1

    公开(公告)日:1995-11-29

    申请号:EP95303597.9

    申请日:1995-05-26

    申请人: The BOC Group plc

    IPC分类号: F25J3/04

    摘要: Air is compressed in compressors 2, 6 and 8, cooled in a main heat exchanger 10, and separated into oxygen and nitrogen products in a double rectification column 20 comprising a higher pressure rectification column 22 and a lower pressure rectification column 24. A liquid oxygen product is withdrawn from the column 24 via a conduit 50. A liquid nitrogen product is also formed. An argon-enriched oxygen vapour stream is withdrawn from the column 24 through an outlet 54 and has argon separated from it in a column 42. In order to help meet the requirements of the column 20 for reflux, a nitrogen vapour stream is withdrawn from the top of the column 24, is warmed by passage through the heat exchanger 10, is recompressed in compressor 66, and is liquefied by passage back through the heat exchanger from its warm end 12 to its cold end 14 and passage through valve 70. A high liquid make and a high argon recovery can both be achieved.

    摘要翻译: 空气在压缩机2,6和8中被压缩,在主热交换器10中被冷却,并且在包括高压精馏塔22和低压精馏塔24的双精馏塔20中被分离成氧气和氮气产品。液氧 产物通过导管50从塔24中取出。还形成液氮产物。 通过出口54将氩富集的氧蒸气流从塔24中抽出并且在塔42中将氩与其分离。为了帮助满足塔20对于回流的要求,将氮蒸气流从 塔24的顶部通过通过热交换器10而被加热,在压缩机66中被再压缩,并且通过从换热器的热端12返回其冷端14并通过阀70而被液化。 液体制造和高氩回收都可以实现。

    Cryogenic liquid nitrogen production system
    5.
    发明公开
    Cryogenic liquid nitrogen production system 失效
    KryogenischesFlüssigstickstoffherstellungsverfahren。

    公开(公告)号:EP0633437A1

    公开(公告)日:1995-01-11

    申请号:EP94110470.5

    申请日:1994-07-06

    IPC分类号: F25J3/02

    摘要: A system for producing liquid nitrogen (239,447) from a nitrogen-containing hydrocarbon stream (200,301) wherein excess refrigeration existing in a nitrogen rejection unit (Fig.1) or in an integrated nitrogen rejection unit-helium rejection unit system (Fig.2) is utilized to effectively generate a liquid nitrogen product stream.

    摘要翻译: 生产方法 氮气包括(a)将氮气和甲烷的进料通入柱和分离器。 进料到富氮蒸气和富含甲烷的液体中。 (b)从塔中取出富氮蒸汽并增加蒸气的压力以产生加压的富氮蒸气; (c)通过与富含甲烷的液体进行间接热交换来冷凝加压的富氮蒸气。 生产liq。 氮; (d)过冷 通过与冷蒸气间接热交换的氮气; 和(e)恢复所得的流程。 氮气作为产品。 该方法还包括(i)提供流控制 氮,甲烷和氦,sepg。 该物流成为富含氮和甲烷的第一流体,并且进入富含氦气的第二流体中,采用第一流体作为进料塔的进料,并采用第二流体作为氦气。 汽; 和(ii)通过与富含甲烷的液体进行间接热交换并将所得蒸气用作氦气连续部分冷凝第二流体。 蒸气,并通过结果。 进入列。

    METHOD OF CONCENTRATING NITROGEN ISOTOPE
    9.
    发明公开
    METHOD OF CONCENTRATING NITROGEN ISOTOPE 有权
    VERFAHREN ZUR KONZENTRIERUNG VON STICKSTOFFISOTOPEN

    公开(公告)号:EP2191885A1

    公开(公告)日:2010-06-02

    申请号:EP08832202.9

    申请日:2008-09-12

    发明人: KIHARA, Hitoshi

    IPC分类号: B01D59/04 F25J3/02

    摘要: The present invention provides a method for concentrating nitrogen isotope comprising a step for obtaining a final product nitrogen, in which the stable nitrogen isotope, 15 N, has been concentrated, by low-temperature distillation of raw material nitrogen containing trace amounts of oxygen and argon with a plurality of distillation columns composed in a cascade arrangement, wherein together with discharging an argon-oxygen mixture from the bottom of the final column and extracting a 15 N-concentrated nitrogen fluid from a lower intermediate point of the final column, the flow rate of the argon-oxygen mixture discharged from the bottom of the final column is controlled based on the reading of a thermometer installed below the point where the final product 15 N-concentrated nitrogen is extracted, thereby enabling the final product nitrogen to be stably obtained.

    摘要翻译: 本发明提供一种浓缩氮同位素的方法,包括通过低温蒸馏含有痕量氧和氩的原料氮,获得最终产物氮的步骤,其中稳定的氮同位素15N已经被浓缩 具有以级联方式组成的多个蒸馏塔,其中从最后塔的底部排出氩 - 氧混合物并从最终塔的较低中间点提取15N浓缩氮流体,流速 基于读取安装在最终产品15N浓缩氮气的点以下的温度计的读数来控制从最终塔底部排出的氩 - 氧混合物,从而能够稳定地获得最终产品氮。