| 摘要 |
A product cryogenic liquid mixture comprising oxygen and nitrogen having a chosen mole fraction of oxygen is produced by expanding, typically through a valve 16, a pressurised stream of a precursor fluid mixture, which may be liquid air, having a mole fraction of oxygen greater than said chosen mole fraction , and thereby forming a vapour phase depleted of oxygen and a liquid phase enriche d in oxygen. The vapour phase is disengaged from the liquid phase in a phase separator 18. A stream of the vapour phase is condensed in a condenser 22. The condensate is collected in a storage vessel 26 as the product cryogen ic liquid mixture.
|
