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    Cryogenic air separation process and apparatus
    1.
    发明授权
    Cryogenic air separation process and apparatus 失效
    低温空气分离工艺及装置

    公开(公告)号：US5311744A

    公开(公告)日：1994-05-17

    申请号：US991663

    申请日：1992-12-16

    申请人： Paul A. Sweeney ,  Ramachandran Krishnamurthy

    发明人： Paul A. Sweeney ,  Ramachandran Krishnamurthy

    IPC分类号： F25J3/04

    CPC分类号： F25J3/04678 ,  F25J3/04303 ,  F25J3/04412 ,  F25J3/04878 ,  F25J2200/34 ,  F25J2240/40 ,  Y10S62/924 ,  Y10S62/939

    摘要： A cryogenic air separation process and method in which air is cooled and after compression and purification then rectified in a rectification column to produce an oxygen rich liquid. An argon-oxygen stream containing liquid lean in nitrogen is separated to form oxygen and argon streams. Argon vapor is condensed to supply reflux to the argon column. An oxygen rich liquid stream is expanded to a pressure at which the oxygen rich liquid is at or below the condensation temperature of the argon vapor and is then vaporized against condensing the argon vapor. The vaporized oxygen rich liquid is then introduced into a nitrogen stripper column and nitrogen is stripped therefrom by a stripper gas to produce the argon-oxygen liquid which is introduced into the argon column. The nitrogen stripper column is regulated to operate at a predetermined pressure range so that the entry level at which oxygen enters the nitrogen stripper column has a pressure level no greater than the pressure of the oxygen rich liquid after expansion. Argon is removed from the top of the argon column as a product. The process and apparatus can be operated to produce high purity argon vapor or liquid very lean in nitrogen and oxygen with the use of trays and/or structured packing as liquid contacting mass transfer elements in the columns. Additionally, high purity oxygen and nitrogen products can also be produced by such process and apparatus.

    摘要翻译： 一种低温空气分离方法和方法，其中空气被冷却并在压缩和净化之后，然后在精馏塔中进行精馏以产生富氧液体。 分离含有在氮气中稀的液体的氩 - 氧气流以形成氧气和氩气流。 氩气被冷凝以向氩塔提供回流。 将富氧液体流膨胀至富氧液体处于或低于氩蒸气的冷凝温度的压力，然后蒸发以冷凝氩蒸气。 然后将蒸发的富氧液体引入氮气汽提塔中，并通过汽提气从其中汽提氮气，以产生引入氩塔的氩 - 氧液体。 调节氮气汽提塔在预定的压力范围内运行，使得氧气进入氮气汽提塔的进入水平的压力水平不高于膨胀后富氧液体的压力。 氩作为产品从氩塔的顶部除去。 该工艺和设备可以运行以产生高纯度的氩气蒸汽或非常贫的氮和氧气，同时使用托盘和/或规整填料作为塔中液体接触的传质元件。 此外，还可以通过这种方法和装置生产高纯度氧和氮产品。

    Air separation process and apparatus for the production of high purity nitrogen
    2.
    发明授权
    Air separation process and apparatus for the production of high purity nitrogen 失效
    用于生产高纯氮的空气分离工艺和设备

    公开(公告)号：US5419137A

    公开(公告)日：1995-05-30

    申请号：US107433

    申请日：1993-08-16

    申请人： Paul A. Sweeney ,  Ramachandran Krishnamurthy

    发明人： Paul A. Sweeney ,  Ramachandran Krishnamurthy

    IPC分类号： F25J3/04 ,  F25J3/02

    CPC分类号： F25J3/04303 ,  F25J3/04212 ,  F25J3/0443 ,  F25J2200/54 ,  F25J2215/44 ,  F25J2215/56 ,  F25J2220/42 ,  Y10S62/939

    摘要： A process and apparatus for producing a high purity nitrogen vapor product from the rectification of air within high and low pressure columns operatively associated with one another by a condenser-reboiler. The high pressure column incorporates a sufficient number of theoretical stages to produce a high purity nitrogen vapor which after being condensed by the condenser-reboiler, serves to partially condense a lower purity nitrogen vapor tower overhead produced in the low pressure column through indirect heat exchanger. In such service, the condensed, high purity nitrogen vapor is at least partially vaporized and utilized as a product stream. Since there is no direct heat exchange with the high purity nitrogen produced within the high pressure column and the lower purity nitrogen vapor produced in the low pressure column, the low pressure column can incorporate fewer theoretical stages and therefore can be built at less expense than similar air separation plants of the prior art.

    摘要翻译： 用于通过冷凝器 - 再沸器彼此操作地相关联的高压塔和低压塔内的空气的整流来生产高纯度氮气蒸气产物的方法和装置。 高压塔包含足够数量的理论阶段以产生高纯度氮气蒸气，其在被冷凝器再沸器冷凝后，用于部分地冷凝通过间接热交换器在低压塔中产生的低纯度氮蒸气塔架塔顶。 在这种使用中，冷凝的，高纯度的氮蒸汽至少部分蒸发并用作产物流。 由于与高压塔内产生的高纯度氮气和低压塔中产生的低纯度氮气蒸气没有直接的热交换，所以低压塔可以并入较少的理论级，因此可以以比类似的方式更低的成本来建造 现有技术的空气分离装置。

    METHODS FOR INHIBITING SOLVENT EMISSIONS
    3.
    发明申请
    METHODS FOR INHIBITING SOLVENT EMISSIONS 审中-公开

    公开(公告)号：US20190143261A1

    公开(公告)日：2019-05-16

    申请号：US16248032

    申请日：2019-01-15

    申请人： Rachid Mabrouk ,  Stevan Jovanovic ,  Joseph Naumovitz ,  Ramachandran Krishnamurthy

    发明人： Rachid Mabrouk ,  Stevan Jovanovic ,  Joseph Naumovitz ,  Ramachandran Krishnamurthy

    IPC分类号： B01D53/14

    摘要： A method for reducing the loss of solvent during carbon dioxide capture from flue gas in an amine based solvent process by the steps of feeding a flue gas containing carbon dioxide to an absorber column containing an amine solvent; absorbing carbon dioxide in the amine solvent forming a rich solvent; feeding the rich solvent to at least one inter-stage cooler; recovering the rich solvent and feeding the rich solvent to a regeneration column; separating the carbon dioxide from the rich solvent and recovering the carbon dioxide to form a lean solvent; feeding the lean solvent to the absorber column. The improvement is realized by one of feeding steam to the flue gas; feeding steam to the absorber column after introduction of amine solvent; feeding the flue gas stream to a demister before feeding to the absorber column or increasing the lean solvent inlet temperature into the absorber column.

    Structured packing
    6.
    发明授权
    Structured packing 失效
    结构包装

    公开(公告)号：US06509082B1

    公开(公告)日：2003-01-21

    申请号：US09593051

    申请日：2000-06-13

    申请人： Kevin Mc Keigue ,  Ramachandran Krishnamurthy ,  Hendrik Adriaan Kooijman

    发明人： Kevin Mc Keigue ,  Ramachandran Krishnamurthy ,  Hendrik Adriaan Kooijman

    IPC分类号： B32B310

    CPC分类号： B01J19/32 ,  B01J2219/32206 ,  B01J2219/3221 ,  B01J2219/32213 ,  B01J2219/32217 ,  B01J2219/32227 ,  B01J2219/32237 ,  B01J2219/32244 ,  B01J2219/32258 ,  B01J2219/32408 ,  B01J2219/32425 ,  B01J2219/32483 ,  B01J2219/3325 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04909 ,  Y10S261/72 ,  Y10T428/24322 ,  Y10T428/24711

    摘要： The present invention provides a structured packing comprising a plurality of corrugated sheets and a plurality of flat, planar members alternating with and located between the sheets to inhibit turbulence in vapor ascending through the structured packing. The plurality of planar members are positioned so that at least the lowermost horizontal edge of the planar members and the corrugated sheets are situated proximal to one another as viewed when said structured packing is in use. When the planar members have substantially the same length and width as the corrugated sheets, the planar members and the corrugated sheets have perforations sized to inhibit transverse liquid and vapor flow while but allowing transverse pressure equalization through the structured packing. The size and number of perforations can be optimized for air separation applications.

    摘要翻译： 本发明提供了一种包括多个波纹片和多个平坦的平面构件的规整填料，所述平坦的平面构件与片材之间交替并且位于片材之间，以阻止通过规整填料上升的蒸气中的湍流。 多个平面构件被定位成使得平面构件和波纹板的至少最下部的水平边缘彼此靠近，当所述规整填料使用时观察。 当平面构件具有与波纹片基本上相同的长度和宽度时，平面构件和波纹片具有穿孔尺寸以防止横向液体和蒸汽流动，同时允许通过规整填料的横向压力平衡。 穿孔的尺寸和数量可以针对空气分离应用进行优化。

    Argon recovery from argon-oxygen-decarburization process waste gases
    8.
    发明授权
    Argon recovery from argon-oxygen-decarburization process waste gases 失效
    氩气回收氩气脱碳工艺废气

    公开(公告)号：US5220797A

    公开(公告)日：1993-06-22

    申请号：US837744

    申请日：1992-02-19

    申请人： Ramachandran Krishnamurthy ,  Donald L. MacLean

    发明人： Ramachandran Krishnamurthy ,  Donald L. MacLean

    IPC分类号： B01D53/047 ,  F25J3/02

    CPC分类号： F25J3/08 ,  B01D53/0476 ,  F25J3/0285 ,  B01D2253/102 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2253/116 ,  B01D2256/12 ,  B01D2256/18 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2259/40001 ,  B01D2259/40015 ,  B01D2259/4003 ,  B01D2259/40066 ,  B01D2259/40069 ,  B01D2259/404 ,  B01D2259/416 ,  F25J2200/02 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/82 ,  F25J2215/58 ,  F25J2270/12 ,  F25J2270/14 ,  F25J2270/42 ,  Y02C10/08 ,  Y10S62/924

    摘要： The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and hydrogen which comprises the steps of (a) purifying the feed mixture to remove contaminants, (b) compressing the purified feed mixture to a separation pressure, and (c) passing the compressed purified feed mixture through a pressure swing adsorption system to separate carbon monoxide, carbon dioxide, and all or most of the nitrogen from the mixture as adsorbed products and to produce an argon-rich fraction as a non-adsorbed product. The argon-rich fraction from step (c) may be further purified by passing the fraction to a cryogenic fractional distillation system to separate hydrogen and any remaining nitrogen from the fraction as a distillate product and to produce a pure argon product. In a second and third embodiment, the invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and oxygen, wherein oxygen is removed from the argon-rich fraction exiting the pressure swing adsorption system in step (c) by passing the fraction to a second pressure swing adsorption system before or after further purification of the fraction in a cryogenic fractional distillation system.

    摘要翻译： 本发明涉及从包含氩气，一氧化碳，二氧化碳，氮气和氢气的进料混合物中回收氩的方法，其包括以下步骤：（a）纯化进料混合物以除去污染物，（b）将纯化的 进料混合物至分离压力，和（c）将经压缩的纯化进料混合物通过变压吸附系统，以将一氧化碳，二氧化碳和来自混合物的全部或大部分氮气作为吸附产物分离，并产生氩气 - 富集部分作为未吸附产物。 通过将馏分通入低温分馏系统将馏分中的氢和任何剩余的氮分离成馏出物，并且产生纯氩产物，可以进一步纯化来自步骤（c）的富氩部分。 在第二和第三实施方案中，本发明涉及从包含氩气，一氧化碳，二氧化碳，氮气和氧气的进料混合物中回收氩的方法，其中从离开变压吸附的富氩馏分中除去氧气 在步骤（c）中通过在低温分馏系统中进一步纯化馏分之前或之后将馏分通入第二变压吸附系统。