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1. CA2830826 - PROCEDE ET APPAREIL DE SEPARATION D'AIR PAR DISTILLATION CRYOGENIQUE

Office
Canada
Numéro de la demande 2830826
Date de la demande 05.04.2012
Numéro de publication 2830826
Date de publication 11.10.2012
Numéro de délivrance
Date de délivrance 16.10.2018
Type de publication C
CIB
F25J 3/04
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 3/0406
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04006Providing pressurised feed air or process streams within or from the air fractionation unit
04048by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
0406of nitrogen
F25J 3/0409
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04006Providing pressurised feed air or process streams within or from the air fractionation unit
04078providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
0409of oxygen
F25J 3/04181
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
04163Hot end purification of the feed air
04169by adsorption of the impurities
04181Regenerating the adsorbents
F25J 3/04206
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04151Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
04187Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
04193Division of the main heat exchange line in consecutive sections having different functions
04206including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
F25J 3/04254
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04248Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
04254using the cold stored in external cryogenic fluids
F25J 3/04309
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
3Processes or apparatus for separating the constituents of gaseous ; or liquefied gaseous; mixtures involving the use of liquefaction or solidification
02by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
04for air
04248Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
04284using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
04309of nitrogen
Déposants L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Inventeurs DAVIDIAN, BENOIT
DUBETTIER-GRENIER, RICHARD
JOLY, LOIC
Données relatives à la priorité 1153070 08.04.2011 FR
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.