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    • 1. 发明授权
    • Cryogenic air separation process and apparatus
    • 低温空气分离工艺及装置
    • US5311744A
    • 1994-05-17
    • US991663
    • 1992-12-16
    • Paul A. SweeneyRamachandran Krishnamurthy
    • Paul A. SweeneyRamachandran Krishnamurthy
    • F25J3/04
    • F25J3/04678F25J3/04303F25J3/04412F25J3/04878F25J2200/34F25J2240/40Y10S62/924Y10S62/939
    • 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.
    • 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。
    • 5. 发明授权
    • Air separation process and apparatus for the production of high purity
nitrogen
    • 用于生产高纯氮的空气分离工艺和设备
    • US5419137A
    • 1995-05-30
    • US107433
    • 1993-08-16
    • Paul A. SweeneyRamachandran Krishnamurthy
    • Paul A. SweeneyRamachandran Krishnamurthy
    • F25J3/04F25J3/02
    • F25J3/04303F25J3/04212F25J3/0443F25J2200/54F25J2215/44F25J2215/56F25J2220/42Y10S62/939
    • 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.
    • 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。