INTEGRATED NITROGEN LIQUEFIER FOR A NITROGEN AND ARGON PRODUCING CRYOGENIC AIR SEPARATION UNIT
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United States of America Patent
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Issued Date -
Jul 13, 2023
app pub date -
Mar 8, 2023
filing date -
May 15, 2020
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Abstract
A nitrogen liquefier configured to be integrated with an argon and nitrogen producing cryogenic air separation unit and method of nitrogen liquefaction are provided. The integrated nitrogen liquefier and associated methods may be operated in at least three distinct modes including: (i) a nil liquid nitrogen mode; (ii) a low liquid nitrogen mode; and (iii) a high liquid nitrogen mode. The present systems and methods are further characterized in an oxygen enriched stream from the lower pressure column of the air separation unit is an oxygen enriched condensing medium used in the argon condenser.
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