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    NITROGEN GENERATING METHOD AND APPARATUS FOR USE IN THE SAME
    1.
    发明授权
    NITROGEN GENERATING METHOD AND APPARATUS FOR USE IN THE SAME 有权

    公开(公告)号：EP1903290B1

    公开(公告)日：2018-08-01

    申请号：EP06766791.5

    申请日：2006-06-16

    申请人： Air Water Inc.

    发明人： YOSHINO, Akira ,  TANAKA, Koji ,  MATSUBAYASHI, Ryosuke ,  SUENAGA, Junya ,  OKUMURA, Shinya

    IPC分类号： F25J3/04 ,  C01B21/04

    CPC分类号： F25J3/04181 ,  F25J3/04157 ,  F25J3/0423 ,  F25J3/04254 ,  F25J3/04412 ,  F25J3/04824 ,  F25J2200/90 ,  F25J2205/70 ,  F25J2210/42 ,  F25J2210/50 ,  F25J2215/50 ,  F25J2290/62

    摘要： There is provided a method of generating nitrogen which includes cryogenically separating compressed air introduced into a high-pressure column 11, storing liquid air 13 in a bottom portion of the high-pressure column 11 and taking nitrogen in gaseous form from an upper portion of the high-pressure column 11, introducing the liquid air 13 stored in the bottom portion of the high-pressure column 11 into a low-pressure column 12, cryogenically separating the liquid air 13 introduced into the low-pressure column 12, storing oxygen-enriched liquid air 22 in a bottom portion of the low-pressure column 12 and taking nitrogen in gaseous form from an upper portion of the low-pressure column 12 as a product gas, introducing the nitrogen taken from the upper portion of the high-pressure column 11 into a condenser 16 to liquefy the nitrogen, refluxing part of the liquid nitrogen to the high-pressure column 11, feeding the remainder of the liquid nitrogen to the upper portion of the low-pressure column 12, and introducing liquid nitrogen or liquid oxygen from outside a system into the low-pressure column as a coolant, wherein the liquid air 13 taken through an extraction pipe 20 is introduced into a portion of a rectification part 12a of the low-pressure column 12 in which the number of theoretical plates from a column bottom side is set within the range of one to ten. This method significantly reduces the amount of raw material air to accomplish significant reductions in power consumption, the amount of coolant and costs of facilities.

    METHOD AND APPARATUS FOR SEPARATING AIR
    4.
    发明公开
    METHOD AND APPARATUS FOR SEPARATING AIR 有权
    方法和设备进行空气分离

    公开(公告)号：EP2324313A2

    公开(公告)日：2011-05-25

    申请号：EP09808556.6

    申请日：2009-06-19

    申请人： Praxair Technology, Inc.

    发明人： HOWARD, Henry Edward

    IPC分类号： F25J3/08

    CPC分类号： F25J3/0486 ,  F25J3/0409 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/04963 ,  F25J2200/54 ,  F25J2210/50 ,  F25J2215/50 ,  F25J2245/50

    摘要： Air separation method in which air is separated within cryogenic rectification processes conducted in first and second cryogenic air separation plants. The first cryogenic air separation plant is designed to produce an oxygen-rich product stream and the second cryogenic air separation plant is designed to produce an impure oxygen vapor stream. At least part of the impure oxygen vapor stream is introduced into a lower pressure column of the first cryogenic air separation plant and oxygen contained in such stream along with air separated within the first air separation plant is used in producing the oxygen-rich product stream.

    VERFAHREN ZUR XENONGEWINNUNG
    9.
    发明授权
    VERFAHREN ZUR XENONGEWINNUNG 有权
    程序用于获得XENON

    公开(公告)号：EP1082577B1

    公开(公告)日：2002-03-27

    申请号：EP99922180.7

    申请日：1999-05-05

    申请人： Linde Gas Aktiengesellschaft

    发明人： HAHN, Erich ,  ROHDE, Wilhelm ,  VOIT, Jürgen

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04751 ,  F25J3/028 ,  F25J3/04745 ,  F25J2200/32 ,  F25J2200/34 ,  F25J2205/30 ,  F25J2210/42 ,  F25J2210/50 ,  F25J2215/34 ,  F25J2215/36 ,  Y10S62/925

    摘要： The invention relates to a method for extracting xenon and eventually also krypton from a liquid oxygen (LOX) charge, as it accrues in a cryogenic air separation system (LZA) during a rectification of the air, mostly as a bottom product of a low-pressure column, namely with xenon (Xe), krypton (Kr) and hydrocarbons (CxHy) in a small concentration and approximately 99 mol % oxygen (O2). According to the inventive method, the LOX charge is fed to a first column, the oxygen of the LOX charge is extensively removed by stripping with an inert gas, and is extracted in the top gas, whereas the inert gas is withdrawn in the form of a liquid from the bottom of the first column with little O2 and nearly the total mass of CxHy, Kr, Xe. According to the invention, the liquid discharge is fed to a second column without prior catalytic and/or adsorptive removal of CxHy. A Kr fraction is extracted as top gas of the second column, and an Xe fraction is withdrawn from the bottom of the second column. The method can be used in a device for extracting Xe and/or Kr in an air separation system (LZA). The device can be arranged in a transportable container.