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1. WO2012136939 - PROCEDE ET APPAREIL DE SEPARATION D'AIR PAR DISTILLATION CRYOGENIQUE

Numéro de publication WO/2012/136939
Date de publication 11.10.2012
N° de la demande internationale PCT/FR2012/050742
Date du dépôt international 05.04.2012
CIB
F25J 3/04 2006.1
FMÉCANIQUE; ÉCLAIRAGE; CHAUFFAGE; ARMEMENT; SAUTAGE
25RÉFRIGÉRATION OU REFROIDISSEMENT; SYSTÈMES COMBINÉS DE CHAUFFAGE ET DE RÉFRIGÉRATION; SYSTÈMES À POMPES À CHALEUR; FABRICATION OU EMMAGASINAGE DE LA GLACE; LIQUÉFACTION OU SOLIDIFICATION DES GAZ
JLIQUÉFACTION, SOLIDIFICATION OU SÉPARATION DES GAZ OU DES MÉLANGES GAZEUX PAR PRESSION ET PAR LE FROID
3Procédés ou appareils pour séparer les constituants des mélanges gazeux impliquant l'emploi d'une liquéfaction ou d'une solidification
02par rectification, c. à d. par échange continuel de chaleur et de matière entre un courant de vapeur et un courant de liquide
04pour l'air
CPC
F25J 2200/34
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2200Processes or apparatus using separation by rectification
34using a side column fed by a stream from the low pressure column
F25J 2200/54
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2200Processes or apparatus using separation by rectification
50using multiple (re-)boiler-condensers at different heights of the column
54in the low pressure column of a double pressure main column system
F25J 2210/42
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2210Processes characterised by the type or other details of the feed stream
42Nitrogen
F25J 2215/52
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2215Processes characterised by the type or other details of the product stream
50Oxygen or special cases, e.g. isotope-mixtures or low purity O2
52Oxygen production with multiple purity O2
F25J 2250/40
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2250Details related to the use of reboiler-condensers
30External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
40One fluid being air
F25J 2250/50
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; OR LIQUEFIED GASEOUS; MIXTURES BY PRESSURE AND COLD TREATMENT ; OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
2250Details related to the use of reboiler-condensers
30External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
50One fluid being oxygen
Déposants
  • L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE [FR]/[FR] (AllExceptUS)
  • DAVIDIAN, Benoit [FR]/[FR] (UsOnly)
  • DUBETTIER-GRENIER, Richard [FR]/[FR] (UsOnly)
  • JOLY, Loïc [FR]/[FR] (UsOnly)
Inventeurs
  • DAVIDIAN, Benoit
  • DUBETTIER-GRENIER, Richard
  • JOLY, Loïc
Mandataires
  • MERCEY, Fiona
Données relatives à la priorité
115307008.04.2011FR
Langue de publication Français (fr)
Langue de dépôt français (FR)
États désignés
Titre
(EN) METHOD AND DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION
(FR) PROCEDE ET APPAREIL DE SEPARATION D'AIR PAR DISTILLATION CRYOGENIQUE
Abrégé
(EN) The invention relates to a method for separating air by cryogenic distillation in a separation unit including a medium-pressure column (23) and a low-pressure column (25), in which a flow of oxygen-rich liquid is sent to the top of the column of pure oxygen, having a vessel reboiler (61), in which said flow is purified in order to form a vessel liquid containing at least 98 mol % of oxygen and the vessel liquid is drawn off as a product; a supercharged airflow at a second pressure higher than the first pressure is sent to the vessel reboiler of the pure oxygen column and to a liquid oxygen vaporiser (51); a nitrogen-rich gas is drawn from the top of the medium-pressure column; said gas is sent to an intermediate reboiler of the low-pressure column and the condensed gas is sent to the top of the medium-pressure column; and a nitrogen-rich gas or air is sent to a vessel reboiler (36) of the low-pressure column and the liquid that condenses therein is sent to the medium-pressure column.
(FR) Dans un procédé de séparation d'air par distillation cryogénique dans une unité de séparation comprenant une colonne moyenne pression (23) et une colonne basse pression (25), on envoie un débit de liquide riche en oxygène en tête de la colonne d'oxygène pur, ayant un rebouilleur de cuve (61), où il s'épure pour former un liquide de cuve contenant au moins 98% mol. d'oxygène et on soutire du liquide de cuve comme produit,on envoie un débit d'air surpressé à une deuxième pression supérieure à la première pression au rebouilleur de cuve de la colonne d'oxygène pur et à un vaporiseur d'oxygène liquide (51),on soutire un gaz riche en azote en tête de la colonne moyenne pression, on l'envoie à un rebouilleur intermédiaire de la colonne basse pression et on envoie le gaz condensé à la tête de la colonne moyenne pression, et on envoie un gaz riche en azote ou de l'air à un rebouilleur de cuve (36) de la colonne basse pression et on envoie le liquide qui s'y condense à la colonne moyenne pression.
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