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    • 8. 发明申请
    • PROCESS OPERATING AT NORMAL PRESSURE FOR PRODUCING OXYGEN OR AIR ENRICHED WITH OXYGEN
    • 用于生产氧气或氧气的正常压力的工艺操作
    • WO2003038359A1
    • 2003-05-08
    • PCT/FI2002/000790
    • 2002-10-09
    • NURMIA, WendieNURMIA, Matti
    • NURMIA, Matti
    • F25J3/04
    • F25J3/04309F25J3/04066F25J3/0463F25J3/04939F25J5/007F25J2200/02F25J2200/04F25J2200/80F25J2210/40F25J2215/40F25J2215/50F25J2250/42F25J2250/50
    • The invention relates to a process for producing oxygen or air enriched with oxygen, in which process: The air entering the process is cooled in a heat exchanger (14) to near to the condensation point of air and the air is led to a separation unit (10) formed of two or more chambers connected thermally to each other and comprising A and B halves (11, 12), in which it is divided, using liquidization and evaporation processes, into two or more gaseous fractions. The process air is maintained at normal temperature, except for small pressure differences to maintain the flow of the air and to optimize the process. When the process air flows through the A half of the separation unit, the liquid oxygen concentrate separated from it is evaporated in the B half (12) of the separation unit at such a pressure, lower than normal pressure, that the desired composition is obtained for the oxygen concentrate and the heat of liquidization released in the A half (11) of the unit is transferred to the B half (12) of the unit and is bound in it to the evaporation of the oxygen concentrate. The low-oxygen-content process air leaving the A half (11) of the separation unit is led out of the process through the heat exchanger (14). The oxygen concentrate evaporated in the B half (12) of the separation unit exits at the lower than normal pressure prevailing in the half in question, either as such, or through a boosting and cooling process to the heat exchanger (14), and from there out of the process. The liquidization and evaporation processes are carried out in the said separation unit (10) in nearly reversible conditions, in such a way that the gas phase in each process and in each part of the separation unit is nearly in equilibrium with the liquid phase in the same part.
    • 本发明涉及一种生产富氧氧的氧气或空气的方法,其中进入该过程的空气在热交换器(14)中被冷却至靠近空气的冷凝点,并且空气被引导到分离单元 (10)由两个或更多个彼此热连接并且包括A和B半部(11,12)的室形成,其中使用液化和蒸发过程将其分成两个或更多个气体馏分。 工作空气维持在正常温度,除了小的压力差以保持空气的流动并优化过程。 当处理空气流过分离单元的一半时,从其分离出的液氧浓缩物在分离单元的B半部(12)中以低于常压的压力蒸发得到所需组合物 对于氧浓缩物,并且在该单元的一半(11)中释放的液化热量被转移到该单元的B半部(12)并且被结合到氧浓缩物的蒸发中。 离开分离单元的一半(11)的低氧含量的处理空气通过热交换器(14)被引出该过程。 在分离单元的B一半(12)中蒸发的氧浓缩物以低于所讨论的一半中的正常压力出口,或者通过对热交换器(14)的升压和冷却过程,以及从 出了这个过程。 液化和蒸发过程在几乎可逆的条件下在所述分离单元(10)中进行,使得每个过程中的气相和分离单元的每个部分中的气相几乎与液相中的液相平衡 同一部分。