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CN102985776A 用于通过低温蒸馏分离空气的方法和设备 失效 - 权利终止

用于通过低温蒸馏分离空气的方法和设备
摘要：
一种用于为了生产具有介于75mol%与95mol%之间的纯度和小于5bar abs的压力的气态氧而对空气进行低温蒸馏的方法，使用包括高压塔（5）、中压塔（3）和低压塔（7）的三塔，所述中压塔借助于第一分凝器完全或部分与所述低压塔热联接，空气被输送至所述中压塔，塔釜液体从所述高压塔被输送至所述低压塔和/或至中压塔的顶部，塔顶气体经由压缩机从所述中压塔被输送至所述高压塔的底部，来自所述高压塔的塔釜液体被输送至所述低压塔的顶部，从所述低压塔的顶部抽取气体，并且从所述低压塔的底部抽取包含介于75mol%与95mol%之间的氧的流体，并且所述高压塔借助于第二分凝器与所述低压塔完全或部分热联接。
摘要（英）：

In a method for the cryogenic distillation of air to produce gaseous oxygen with a purity of between 75 mol% and 95 mol% and a pressure lower than 5 bar abs with a triple column comprising a high-pressure column (5), a medium-pressure column (3) and a low-pressure column (7), the medium-pressure column being wholly or partially thermally coupled to the low-pressure column by means of a first dephlegmator, air being sent to the medium-pressure column, a vessel liquid is sent from the high pressure column to the low-pressure column and/or to the top of the medium-pressure column, a head gas is sent from the medium-pressure column to the bottom of the high-pressure column via a compressor, a vessel liquid from the high-pressure column is sent to the top of the low-pressure column; a gas is withdrawn from the top of the low-pressure column and a fluid containing between 75 mol% and 95 mol% of oxygen is withdrawn from the bottom of the low-pressure column, and the high-pressure column is also wholly or partially thermally coupled to the low-pressure column by means of a second dephlegmator.

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