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    Air separation
    44.
    发明授权
    Air separation 失效

    公开(公告)号：EP0286314B1

    公开(公告)日：1992-05-20

    申请号：EP88302876.3

    申请日：1988-03-30

    申请人： The BOC Group plc

    发明人： Layland, David John ,  Lavin, John Terence

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04309 ,  F25J3/042 ,  F25J3/04278 ,  F25J3/04296 ,  F25J3/04327 ,  F25J3/04357 ,  F25J3/04393 ,  F25J3/044 ,  F25J3/0466 ,  F25J2200/38 ,  F25J2200/50 ,  F25J2205/02 ,  F25J2215/50 ,  F25J2250/20 ,  F25J2270/02 ,  F25J2270/60 ,  F25J2270/90 ,  Y10S62/924

    摘要： Air is compressed in compressor 200, is reduced in temperature to its dew point by passage through successive heat exchangers 204, 206, 210 and 212 (water and carbon dioxide being removed therefrom in heat exchangers 204 and 206). The air is introduced into a first distillation column 216 through an inlet 218. It is separated into oxygen and nitrogen therein. Nitrogen vapour is withdrawn from the top of the column 216 through outlet 228, is warmed, is compressed in compressors 234 and 236, is cooled, is expanded in expansion turbine 238 and is then passed through a reboiler 220 to provide reboil for the column 216. A resulting liquid stream is passed through a throttling valve 244 and liquid nitrogen is collected in phase separator 230. Some of this liquid nitrogen is returned to the column 216 as reflux, while another part is used to provide product. Argon-enriched oxygen vapour is withdrawn from the column 216 through an outlet 260, and is separated to form argon product in a further distillation column 226 which is reboiled by vapour from the top of the column 216.

    ENHANCED ARGON RECOVERY FROM INTERMEDIATE LINBOIL.
    46.
    发明公开
    ENHANCED ARGON RECOVERY FROM INTERMEDIATE LINBOIL. 失效
    ARGONGEWINNUNG DURCH ZWISCHENGESCHALTETES AUFKOCHEN VONFLÜSSIGEMSTICKSTOFF。

    公开(公告)号：EP0318564A4

    公开(公告)日：1989-09-26

    申请号：EP88905531

    申请日：1988-06-02

    申请人： ERICKSON DONALD C

    发明人： ERICKSON DONALD CHARLES

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04103 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04309 ,  F25J3/04357 ,  F25J3/04412 ,  F25J3/04672 ,  F25J3/04678 ,  F25J3/0469 ,  F25J2200/32 ,  F25J2205/02 ,  F25J2250/40 ,  F25J2250/50 ,  Y10S62/924

    摘要： The argon recovery obtainable from a dual pressure cryogenic air distillation plant for production of high purity oxygen is increased beyond present levels without offsetting incurrence of detriments such as lower O2 pressure, lower O2 or N2 recovery, less liquid recovery, or increased energy. This is done by providing an intermediate reflux condenser (208) (component (208) of Figure 2) in the argon sidearm (202b), and providing liquid N2 via valve (209) to said condenser, thereby increasing the reboil up both the argon stripper (202a) and the lower section of the argon sidearm (202b) proportional to the amount of LN2 evaporated in the condenser (208).

    摘要翻译： 从用于生产高纯度氧气的双压低温空气蒸馏设备获得的氩气回收增加超过目前的水平，而不会抵消诸如较低的O 2压力，较低的O 2或N 2回收，较少的液体回收或增加的能量之类的损害。 这是通过在氩气侧臂（202b）中提供中间回流冷凝器（208）（图2的组分（208））和通过阀（209）将液氮提供给所述冷凝器，从而增加氩气 汽提塔（202a）和氩侧臂（202b）的下部分与在冷凝器（208）中蒸发的LN2的量成比例。

    PROCESS AND APPARATUS FOR PRODUCING ARGON BY CRYOGENIC AIR SEPARATION
    49.
    发明公开
    PROCESS AND APPARATUS FOR PRODUCING ARGON BY CRYOGENIC AIR SEPARATION 审中-公开

    公开(公告)号：EP4390281A1

    公开(公告)日：2024-06-26

    申请号：EP22020618.9

    申请日：2022-12-20

    申请人： Linde GmbH

    发明人： Kunz, Christian ,  Kirchner, Lars

    IPC分类号： F25J3/04

    CPC分类号： F25J3/0409 ,  F25J3/04224 ,  F25J3/04357 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04727 ,  F25J3/048 ,  F25J2280/0220130101

    摘要： The process for producing an argon-enriched fraction by cryogenic air separation comprises
    - introducing feed air into a distillation system for oxygen-nitrogen separation comprising a low-pressure column,
    - withdrawing an argon-containing fraction from the low-pressure column and introducing it into a crude argon column having a crude argon top condenser being indirectly cooled by a cryogenic working fluid,
    - withdrawing an argon-enriched fraction from an upper section of the crude argon column,
    - measuring the oxygen content in the argon-containing fraction,
    characterized in that
    - measuring the nitrogen content in the argon-containing fraction,
    - predicting the nitrogen content in the crude argon condenser on the basis of the measured nitrogen content and
    - controlling the operation of the crude argon column depending on such corrected estimated argon concentration depending on such predicted nitrogen content in the crude argon condenser.
    A respective apparatus is claimed as well.