Method and apparatus for producing liquid mixtures of oxygen...

B - Operations – Transporting – 01 – F

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B01F 13/06 (2006.01) B01F 3/08 (2006.01) F17C 9/00 (2006.01)

Patent

CA 2218859

A method and apparatus of mixing liquid oxygen and liquid nitrogen to form a liquid mixture in which such streams are passed through a parallel flow heat exchanger in order to form a subcooled liquid oxygen stream and a partly vaporized liquid nitrogen stream both having the same temperature. The partly vaporized liquid nitrogen stream is phase separated in a phase separator to form liquid and vaporized nitrogen phases. The liquid phase stream composed of the liquid nitrogen is mixed with the subcooled liquid oxygen stream, preferably in a mixing tee, in order to form the desired mixture.

Méthode et appareil pour mélanger de l'oxygène et de l'azote liquides donnant un mélange liquide; les circuits d'oxygène et d'azote passent à travers un échangeur thermique à courants parallèles, de façon à produire un courant d'oxygène liquide sous-refroidi et un courant d'azote liquide partiellement vaporisé, les deux se trouvant à la même température. On fait passer le courant d'azote liquide partiellement vaporisé dans un séparateur en phases, qui donne une phase d'azote liquide et une phase d'azote vaporisé. Le circuit de la phase liquide, constitué de l'azote liquide, est mélangé avec le courant d'oxygène liquide sous-refroidi, de préférence dans un té mélangeur, pour obtenir le mélange recherché.

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