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    Air separation process for the production of oxygen-rich and nitrogen-rich products
    32.
    发明授权
    Air separation process for the production of oxygen-rich and nitrogen-rich products 失效
    空气分离过程生产富氧和富氮产品

    公开(公告)号：US4936099A

    公开(公告)日：1990-06-26

    申请号：US354173

    申请日：1989-05-19

    申请人： Donald W. Woodward ,  Rakesh Agrawal

    发明人： Donald W. Woodward ,  Rakesh Agrawal

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04103 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04284 ,  F25J3/04418 ,  F25J3/0486 ,  F25J2200/54 ,  F25J2205/02 ,  F25J2235/52 ,  F25J2250/20 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2250/52

    摘要： The present invention is an improvement to a two distillation column, cryogenic air separation process which produces nitrogen-rich and oxygen-rich products. The improvement to the process is condensing at least a portion of the nitrogen overhead from the high pressure column in a reboiler/condenser against a crude liquid oxygen stream and in an intermediate reboiler/condenser located in the low pressure column against internal low pressure column streams. The condensed nitrogen overhead is fed either to the low pressure or high pressure columns as reflux. The vaporized portion of the crude liquid oxygen stream is work expanded to provide some or all of the refrigeration required for the process.

    摘要翻译： 本发明是对两个蒸馏塔，低温空气分离方法的改进，其产生富氮和富氧产物。 该方法的改进是将再沸器/冷凝器中的来自高压塔的氮塔顶馏出物的至少一部分与粗液氧流和位于低压塔中的中间再沸器/冷凝器相对于内部低压塔流 。 冷凝的氮气塔顶作为回流进料到低压塔或高压塔。 粗液氧气流的蒸发部分工作膨胀以提供该方法所需的部分或全部制冷。

    High pressure nitrogen production cryogenic process
    33.
    发明授权
    High pressure nitrogen production cryogenic process 失效
    高压氮生产低温工艺

    公开(公告)号：US4927441A

    公开(公告)日：1990-05-22

    申请号：US428377

    申请日：1989-10-27

    申请人： Rakesh Agrawal

    发明人： Rakesh Agrawal

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04884 ,  F25J3/04321 ,  F25J3/0443 ,  F25J2230/40 ,  F25J2245/02 ,  F25J2250/10 ,  F25J2250/20

    摘要： The present invention is a cryogenic process to produce medium to high pressure gaseous nitrogen without the use of a nitrogen product compressor. The process is an improvement to a conventional nitrogen generator with waste expander. The present invention reboils crude liquid oxygen from the main distillation column in two stages at different pressures and uses a small number of trays above one of the reboilers. The use of the trays above one of the reboilers allows collection of a pressurized stream with a composition similar to air. This pressurized stream is recycled to an intermediate stage of the main air compressor.

    摘要翻译： 本发明是一种在不使用氮气产品压缩机的情况下生产中等至高压气态氮的低温方法。 该方法是对具有废物膨胀器的常规氮气发生器的改进。 本发明在不同的压力下分两个阶段从主蒸馏塔中重新排出粗液氧，并使用一个再沸器上方的少量塔盘。 在一个再沸器之上使用塔板允许收集具有类似于空气的组成的加压流。 该加压流被再循环到主空气压缩机的中间阶段。

    Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery
    34.
    发明授权
    Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery 失效
    高氩回收和中等氮回收的空气分离过程和设备

    公开(公告)号：US4822395A

    公开(公告)日：1989-04-18

    申请号：US203264

    申请日：1988-06-02

    申请人： Harry Cheung

    发明人： Harry Cheung

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04412 ,  F25J3/04212 ,  F25J3/04303 ,  F25J3/04672 ,  F25J3/04715 ,  F25J2200/08 ,  F25J2200/50 ,  F25J2235/50 ,  F25J2250/20 ,  Y10S62/924

    摘要： Process and apparatus to produce argon at high recovery with nitrogen at higher than conventional pressure comprising three columns wherein first column bottoms are passed into the second column, second column bottoms drive a third column top condenser, and argon-containing fluid is passed for separation into the third column from the second column at a point intermediate the points where first column bottoms enter and second column bottoms exit the second column.

    摘要翻译： 用高于常规压力的氮气高回收率的氩气的方法和装置包括三塔，其中第一塔底部物质进入第二塔，第二塔底部驱动第三塔顶冷凝器，并且使含氩流体分离成 第二列的第三列在第一列底部进入的点和第二列底部离开第二列的点之间的点处。

    The production of oxygen
    39.
    发明授权
    The production of oxygen 失效
    氧气的生产

    公开(公告)号：US3754406A

    公开(公告)日：1973-08-28

    申请号：US3754406D

    申请日：1971-03-15

    申请人： AIR PROD & CHEM

    发明人： ALLAM R

    IPC分类号： F25J3/04 ,  F25J3/02

    CPC分类号： F25J3/0486 ,  F25J3/0409 ,  F25J3/04206 ,  F25J3/04218 ,  F25J3/04303 ,  F25J3/04424 ,  F25J3/04884 ,  F25J2205/02 ,  F25J2205/24 ,  F25J2205/60 ,  F25J2235/02 ,  F25J2235/50 ,  F25J2245/40 ,  F25J2245/50 ,  F25J2250/02 ,  F25J2250/20 ,  F25J2250/40 ,  F25J2250/50

    摘要： A plant for the production of low purity oxygen, in which a low pressure stream of incoming air is cooled against outgoing gas streams and fed into a high pressure fractionating column, and a high pressure stream of incoming air is cooled against outgoing gas streams, partially condensed against boiling liquid oxygen product in a product vaporizer, and separated into gas and liquid streams, the liquid stream being sub-cooled and expanded into a low pressure fractionating column while a major part of the gas stream is re-heated and expanded to provide plant refrigeration. Crude liquid oxygen from the bottom of the high pressure column is cooled against waste outgoing nitrogen from the low pressure column and then admitted to the low pressure column after first being used to liquefy some of the nitrogen from the high pressure column in an external reboiler/condenser. Liquid oxygen product from the low pressure column is pumped to a higher pressure before being passed through the sub-cooler and the product vaporizer. The remainder of the high pressure column nitrogen is liquefied in a second external reboiler/condenser by the separated high pressure liquid feed on its way to the low pressure column. The liquefied high pressure column nitrogen is used as reflux for the two columns, that for the low pressure column being cooled against outgoing waste nitrogen. The expander exhaust is likewise cooled against outgoing waste nitrogen before admission to the low pressure column.

    摘要翻译： 用于生产低纯度氧气的设备，其中进入空气的低压流被冷却以抵抗输出的气流并进料到高压分馏塔中，并且高压的进入空气流被冷却以抵抗输出的气流，部分 在产品蒸发器中与沸腾的液氧产物冷凝并分离成气体和液体流，将液体流冷却并膨胀成低压分馏塔，同时将大部分气流重新加热和膨胀以提供 植物制冷。 来自高压塔底部的粗液态氧气从低压塔中排出的氮气被冷却，然后在首先用于液化来自外部再沸器/高压塔中的高压塔中的一些氮气之后进入低压塔， 冷凝器 来自低压塔的液氧产物在通过副冷却器和产品蒸发器之前被泵送到更高的压力。 剩余的高压塔氮通过分离的高压液体进料在通向低压塔的途中在第二外部再沸器/冷凝器中液化。 液化高压塔氮用作两塔的回流，低压塔被冷却出来的废氮。 在进入低压塔之前，膨胀器排气同样被排出废氮排出。