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发明公开
CN104540576A 用于通过部分冷凝和渗透分离富含二氧化碳的气体的方法 有权

用于通过部分冷凝和渗透分离富含二氧化碳的气体的方法
摘要：
本发明涉及一种分离方法，其中：富含二氧化碳的气体在第一热交换器(5)中被冷却；在第一热交换器中冷却的富含二氧化碳的气体在介于-50℃和-53℃之间的第一温度下进入第一相分离器(9)；富含二氧化碳的液体(13)被从第一相分离器提取出并用作产品；来自第一分离器的贫含二氧化碳的气体(11)在没有在第一相分离器的下游膨胀的情况下在第一交换器中被再加热到介于-35℃和-45℃之间的第二温度，并且在该第二温度下进入渗透单元(17)；经再加热的气体在渗透单元中经历至少一个渗透步骤以便产生至少两种流体(19，21)，所述至少两种流体然后在第一交换器中被再加热，以最低温度离开渗透单元的从渗透单元得到、在交换器中被再加热的流体处于-54℃以上的温度。
摘要（英）：

The invention relates to a separation method in which a carbon dioxide-rich gas is cooled in a first heat exchanger (5); the carbon dioxide-rich gas cooled in the first heat exchanger enters a first phase separator (9) at a first temperature between -50 DEG C and -53 DEG C; a carbon dioxide-enriched liquid (13) is drawn from the first phase separator and acts as product; a carbon dioxide-depleted gas (11) from the first separator is reheated in the first exchanger to a second temperature between -35 DEG Cand -45 DEG C, without having been expanded downstream from the first phase separator and enters a permeation unit (17) at the second temperature; the reheated gas is subjected to at least one permeation step in the permeation unit in order to produce at least two fluids (19, 21) which are then reheated in the first exchanger, the fluid from the permeation unit, reheated in the exchanger, which exits the permeation unit at the lowest temperature, being at a temperature of more than -54 DEG C.

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