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    • 3. 发明申请
    • APPARATUS AND METHOD FOR SEPARATING AIR BY CRYOGENIC DISTILLATION
    • 通过低温蒸馏分离空气的装置和方法
    • WO2009136081A2
    • 2009-11-12
    • PCT/FR2009050625
    • 2009-04-08
    • AIR LIQUIDEBRIGLIA ALAINSAULNIER BERNARDSAMY LAURENT
    • BRIGLIA ALAINSAULNIER BERNARDSAMY LAURENT
    • F25J3/04
    • F25J3/04745F25J3/0409F25J3/04412F25J2200/94F25J2215/02F25J2250/40F25J2250/52
    • In a method for separating air by cryogenic distillation in a double column comprising a medium-pressure column (20) and a low-pressure column (21), cooled and purified compressed gaseous air (1) is sent to a first level of the medium-pressure column, cooled and purified compressed liquid air (3) is sent to a second level of the medium-pressure column, a liquid (5) enriched in oxygen, krypton and xenon is tapped from the bottom of the medium-pressure column, a liquid (6) is tapped from the medium-pressure column at a level somewhere between the first and second levels, and sent to the low-pressure column, the liquid enriched in oxygen, krypton and xenon is partially vaporized to form an intermediate gas and an intermediate liquid, a first liquid stream (10) rich in oxygen is tapped from the low-pressure column, a second liquid stream (11) rich in oxygen is tapped from the low-pressure column at a level lower than the intermediate level and the intermediate liquid is sent from the vaporizer to the low-pressure column at an intermediate level of the low-pressure column or is mixed with the second oxygen-rich liquid stream.
    • 在包括中压塔(20)和低压塔(21)的双塔中通过低温蒸馏分离空气的方法中,冷却和纯化的压缩气体空气(1)被送到介质的第一级 将压力柱,冷却和纯化的压缩液体空气(3)送入中压塔的第二级,从中压塔的底部抽出富含氧,氪和氙的液体(5) 在第一和第二水平之间的某一水平处从中压塔中抽出液体(6),并将其送入低压塔,富含氧,氪和氙的液体被部分蒸发以形成中间气体 和中间液体,从低压塔中抽出富含氧的第一液体物流(10),从低压塔中抽出富含氧的第二液体物流(11)的水平低于中间水平 中间液体从蒸气送出 在低压塔的中间水平的低压塔中或与第二富氧液体流混合。