F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01)
Patent
CA 2246871
An improved efficiency system for producing low purity oxygen by rectification of air employs a high pressure column and a low pressure column and includes the steps of: turboexpanding a flow of nitrogen-rich gas from the high pressure column to provide a cooled nitrogen-rich gas flow; condensing the cooled nitrogen-rich gas flow to a nitrogen-rich liquid against a flow of a vaporizing oxygen-rich liquid flow taken from the low pressure column; passing the nitrogen-rich liquid as a reflux flow to the low pressure column; returning the vaporizing oxygen liquid to the low pressure column; and employing energy derived from the turboexpanding step to compress feed air.
Système à efficacité améliorée pour la production d'oxygène de pureté inférieure par rectification d'air à l'aide d'une colonne haute pression et d'une colonne basse pression, comprenant les étapes suivantes : turboexpansion d'un flux de gaz riche en azote à partir de la colonne haute pression pour l'obtention d'un flux gazeux refroidi, riche en azote; condensation de ce flux gazeux refroidi, riche en azote, en un liquide riche en azote, opposé à un flux de liquide riche en oxygène, en phase de vaporisation, lequel est prélevé de la colonne basse pression; passage du liquide riche en azote par reflux dans la colonne basse pression; retour du liquide riche en oxygène, en phase de vaporisation, dans la colonne basse pression. L'énergie provenant de l'étape de turboexpansion est utilisée pour comprimer l'air d'alimentation.
Bonaquist Dante Patrick
Sattan Susan Marie
Praxair Technology Inc.
Sim & Mcburney
LandOfFree
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