Cryogenic air separation process

Cryogenic air separation process

  • CN 101,351,680 A
  • Filed: 10/31/2006
  • Published: 01/21/2009
  • Est. Priority Date: 11/03/2005
  • Status: Active Application
First Claim
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1. method with the feeding air cryogenic separation, wherein feeding air cools off in main heat exchanger, produce oxygen enriched liquid and nitrogen rich vapor by the separation of cryogenic rectification at least one tower, oxygen enriched liquid pressure is improved, by with carry out the oxygen enriched liquid evaporation that indirect heat exchange makes described pressurization to the small part feeding air, produce product oxygen, improvements comprise:

  • produce to surpass and to carry out the required enough extra refrigeration of cryogenic rectification, make minimum internal difference in temperature that total hot junction temperature difference of described method surpasses main heat exchanger 2K at least.

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