Method and apparatus for producing nitrogen by cryogenic distillation of air
    4.
    发明授权
    Method and apparatus for producing nitrogen by cryogenic distillation of air 有权
    通过空气的低温蒸馏来生产氮的方法和装置

    公开(公告)号:US09476640B2

    公开(公告)日:2016-10-25

    申请号:US13087702

    申请日:2011-04-15

    申请人: Patrick Le Bot

    发明人: Patrick Le Bot

    IPC分类号: F25J3/04 F25J3/06

    摘要: In a method for producing nitrogen by cryogenic distillation, air containing carbon monoxide is sent to a cryogenic distillation column (5), a flow D of nitrogen is taken from the top of the distillation column, with a CO content less than a fixed value S1, and a flow of nitrogen-rich cryogenic liquid coming from an external source (7) is sent to the top of the column, the flow rate of cryogenic liquid sent to the column being less than a value V if the CO content in the air does not exceed a previously defined threshold (S0), and the flow rate of cryogenic liquid sent to the column being greater than a value V if the carbon monoxide content of the air exceeds this previously defined threshold (S0).

    摘要翻译: 在通过低温蒸馏生产氮气的方法中,将含有一氧化碳的空气送至低温蒸馏塔(5),从蒸馏塔顶部取出氮气流量,其中CO含量小于固定值S1 ,并且来自外部源(7)的富氮低温液体流被传送到塔的顶部,如果空气中的CO含量,则送到塔的低温液体的流速小于值V 不超过先前定义的阈值(S0),并且如果空气的一氧化碳含量超过该先前定义的阈值(S0),则发送到塔的低温液体的流速大于值V.

    Air separation process and apparatus using cryogenic distillation
    7.
    发明授权
    Air separation process and apparatus using cryogenic distillation 有权
    空气分离过程和使用低温蒸馏的设备

    公开(公告)号:US08776546B2

    公开(公告)日:2014-07-15

    申请号:US12305490

    申请日:2007-06-19

    IPC分类号: F25J3/00 F17C9/02

    摘要: An air distillation unit comprises an air distillation column (10) suitable for producing a nominal flow of gaseous nitrogen, the top of said column being connected to a liquid nitrogen source (8), and operates by carrying out the following steps: a flow of compressed, cooled and purified air is sent to an exchanger (11) and then to the column, a flow of gaseous nitrogen is withdrawn from the column, the level of liquid at the bottom of the column is controlled; and injection liquid (20), sent from the source to the column, is no longer sent if the required production reduces to at most the nominal production. Application to the separation of air by cryogenic distillation.

    摘要翻译: 空气蒸馏单元包括适于产生标称气态氮气的空气蒸馏塔(10),所述塔的顶部连接到液氮源(8),并通过执行以下步骤操作:流动 压缩,冷却和净化的空气被送到交换器(11),然后送到塔中,从塔中取出气态氮气流,控制塔底部的液体水平; 如果所需的生产量减少到最多的标称产量,则从源到塔的进料液体(20)不再发送。 应用于通过低温蒸馏分离空气。