FR3112200A3 - Cryogenic air separation apparatus - Google Patents

Cryogenic air separation apparatus Download PDF

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Publication number
FR3112200A3
FR3112200A3 FR2101068A FR2101068A FR3112200A3 FR 3112200 A3 FR3112200 A3 FR 3112200A3 FR 2101068 A FR2101068 A FR 2101068A FR 2101068 A FR2101068 A FR 2101068A FR 3112200 A3 FR3112200 A3 FR 3112200A3
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Prior art keywords
column
sending
enriched
operating
pressure
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FR2101068A
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French (fr)
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FR3112200B3 (en
Inventor
Patrice Cavagne
Remy Kurtz
Delphine Vallier
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • F25J3/04878—Side by side arrangement of multiple vessels in a main column system, wherein the vessels are normally mounted one upon the other or forming different sections of the same column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

Titre : Appareil de séparation d’air par distillation cryogénique Un appareil de séparation d’air par distillation cryogénique comprend une première colonne (1) opérant à une première pression, une deuxième colonne (2) opérant à une deuxième pression et une troisième colonne (3) opérant à une troisième pression, des moyens pour envoyer de l’air épuré et refroidi se séparer dans la première colonne par distillation cryogénique, les première et deuxième colonnes étant posées côte à côte, ancrées sur le sol, des moyens pour envoyer un gaz enrichi en argon pris dans la deuxième colonne à la troisième colonne et des moyens pour envoyer un liquide de cuve (6) de la troisième colonne vers la deuxième colonne par gravitation, la troisième colonne étant boulonnée (7) à un support (5) en forme d’ossature allongée ayant un axe vertical, l’ossature reposant sur le sol. Figure de l’abrégé : FIG. 1Title: Cryogenic Distillation Air Separation Apparatus A cryogenic distillation air separation apparatus comprises a first column (1) operating at a first pressure, a second column (2) operating at a second pressure, and a third column ( 3) operating at a third pressure, means for sending purified and cooled air to separate in the first column by cryogenic distillation, the first and second columns being placed side by side, anchored to the ground, means for sending a argon-enriched gas taken from the second column to the third column and means for sending a bottom liquid (6) from the third column to the second column by gravity, the third column being bolted (7) to a support (5) in the form of an elongated framework having a vertical axis, the framework resting on the ground. Abstract figure: FIG. 1

Description

Appareil de séparation d’air par distillation cryogéniqueApparatus for air separation by cryogenic distillation

La présente invention est relative à un appareil de séparation d’air par distillation cryogénique. L’appareil comprend une première colonne opérant à une première pression, une deuxième colonne opérant à une deuxième pression et une troisième colonne opérant à une troisième pression.The present invention relates to an apparatus for separating air by cryogenic distillation. The apparatus includes a first column operating at a first pressure, a second column operating at a second pressure, and a third column operating at a third pressure.

L’air épuré et refroidi est séparé dans la première colonne par distillation cryogénique, le liquide de cuve enrichi en oxygène est envoyé de la première colonne à la deuxième colonne et le liquide de tête de la première colonne est envoyé de la première colonne à la tête de la deuxième colonne.The purified and cooled air is separated in the first column by cryogenic distillation, the bottom liquid enriched in oxygen is sent from the first column to the second column and the overhead liquid from the first column is sent from the first column to the head of the second column.

Un gaz enrichi en azote est soutiré de la cuve de la deuxième colonne et un fluide enrichi en oxygène est soutiré en cuve de la première colonne.A nitrogen-enriched gas is withdrawn from the bottom of the second column and an oxygen-enriched fluid is withdrawn from the bottom of the first column.

Les première et deuxième colonnes sont posées côte à côté, ancrées sur le sol.The first and second columns are laid side by side, anchored to the ground.

La troisième colonne est alimentée par un gaz enrichi en argon pris dans la deuxième colonne et permet de produire de l’argon pur. Le liquide de cuve de la troisième colonne revient vers la deuxième colonne et donc la troisième colonne doit être disposée en sorte que sa cuve se trouve au-dessus du point auquel doit être renvoyé le liquide. Ainsi la colonne argon doit être disposée en hauteur, comme décrit dans US4994098, pour permettre l’écoulement gravitationnel du liquide.The third column is fed by a gas enriched in argon taken from the second column and makes it possible to produce pure argon. The bottom liquid from the third column returns to the second column and therefore the third column must be arranged so that its bottom is above the point to which the liquid is to be returned. Thus the argon column must be arranged in height, as described in US4994098, to allow the gravitational flow of the liquid.

Pour positionner la colonne suffisamment haut, il est connu de prolonger la virole de la colonne en jupe comme illustré dans WO2019/144380. Or ceci rend le paquet de transport très long, puisque la colonne elle-même fait entre 20 et 40m de long et la jupe fait entre un tiers et la moitié de sa longueur.To position the column high enough, it is known to extend the collar of the column into a skirt as illustrated in WO2019/144380. However, this makes the transport package very long, since the column itself is between 20 and 40m long and the skirt is between a third and a half of its length.

Selon un objet de l’invention il est prévu un appareil de séparation d’air par distillation cryogénique comprenant une première colonne opérant à une première pression, une deuxième colonne opérant à une deuxième pression et une troisième colonne opérant à une troisième pression, des moyens pour envoyer de l’air épuré et refroidi se séparer dans la première colonne par distillation cryogénique, des moyens pour envoyer du liquide de cuve enrichi en oxygène de la première colonne à la deuxième colonne, des moyens pour envoyer le liquide de tête de la première colonne de la première colonne à la tête de la deuxième colonne, des moyens pour soutirer un gaz enrichi en azote de la cuve de la deuxième colonne, des moyens pour soutirer un fluide enrichi en oxygène en cuve de la première colonne, les première et deuxième colonnes étant posées côte à côte, ancrées sur le sol, des moyens pour envoyer un gaz enrichi en argon pris dans la deuxième colonne à la troisième colonne et des moyens pour envoyer un liquide de cuve de la troisième colonne vers la deuxième colonne par gravitation, la troisième colonne étant boulonnée à un support en forme d’ossature allongée ayant un axe vertical, l’ossature reposant sur le sol.According to one object of the invention, there is provided an air separation apparatus by cryogenic distillation comprising a first column operating at a first pressure, a second column operating at a second pressure and a third column operating at a third pressure, means for sending purified and cooled air to separate in the first column by cryogenic distillation, means for sending oxygen-enriched bottom liquid from the first column to the second column, means for sending the overhead liquid from the first column of the first column at the top of the second column, means for drawing off a gas enriched in nitrogen from the bottom of the second column, means for drawing off a fluid enriched in oxygen from the bottom of the first column, the first and second columns being laid side by side, anchored to the ground, means for sending an argon-enriched gas taken from the second column to the third column and means for e nsent tank liquid from the third column to the second column by gravity, the third column being bolted to a support in the form of an elongated frame having a vertical axis, the frame resting on the ground.

De préférence l’appareil comprend uniquement des moyens pour envoyer un liquide de cuve de la troisième colonne vers la deuxième colonne par gravitation et aucun autre moyen, tel qu’une pompe, pour entraîner le liquide vers la deuxième colonne.Preferably, the apparatus only comprises means for sending a bottom liquid from the third column to the second column by gravity and no other means, such as a pump, for driving the liquid towards the second column.

L’invention sera décrite de manière plus détaillée en se référant aux figures.The invention will be described in more detail with reference to the figures.

illustre un appareil selon l’invention. illustrates an apparatus according to the invention.

illustre un appareil selon l’invention. illustrates an apparatus according to the invention.

Dans , l’air épuré et refroidi est séparé dans une première colonne 1 par distillation cryogénique, le liquide de cuve enrichi en oxygène est envoyé de la première colonne 1 à la deuxième colonne 2 et le liquide de tête de la première colonne est envoyé de la première colonne 1 à la tête de la deuxième colonne 2.In , the purified and cooled air is separated in a first column 1 by cryogenic distillation, the oxygen-enriched bottom liquid is sent from the first column 1 to the second column 2 and the overhead liquid from the first column is sent from the first column 1 to the head of the second column 2.

Un gaz enrichi en azote est soutiré de la cuve de la deuxième colonne 2 et un fluide enrichi en oxygène est soutiré en cuve de la première colonne 2.A gas enriched in nitrogen is withdrawn from the tank of the second column 2 and a fluid enriched in oxygen is withdrawn from the tank of the first column 2.

Les première et deuxième colonnes 1,2 sont posées côte à côté, ancrées sur le sol.The first and second columns 1.2 are placed side by side, anchored to the ground.

La troisième colonne 3 est alimentée par un gaz enrichi en argon pris dans la deuxième colonne 2 et permet de produire un fluide enrichi en argon, soutiré en tête de la colonne. Le liquide de cuve 6 de la troisième colonne revient vers la deuxième colonne et donc la troisième colonne doit être disposée en sorte que sa cuve se trouve au-dessus du point auquel doit être renvoyé le liquide. Ainsi la troisième colonne 3 doit être disposée en hauteur pour permettre l’écoulement gravitationnel du liquide. Aucune pompe n’est utilisée pour envoyer le liquide 6 vers la deuxième colonne 2.The third column 3 is supplied with a gas enriched in argon taken from the second column 2 and makes it possible to produce a fluid enriched in argon, drawn off at the top of the column. The bottom liquid 6 of the third column returns to the second column and therefore the third column must be arranged so that its bottom is above the point to which the liquid must be returned. Thus the third column 3 must be arranged in height to allow the gravitational flow of the liquid. No pump is used to send the liquid 6 to the second column 2.

Ainsi on prévoit une structure de support constitué par une ossature 5, dont la hauteur est choisie pour que la cuve de la troisième colonne 3, boulonnée sur la structure, se trouve à la bonne hauteur. L’ossature 5 est de forme allongée, avec son axe à la verticale et elle repose sur le sol. De préférence, elle est montée sur la même plateforme que la deuxième colonne 2. Ainsi cette plateforme est dimensionnée pour supporter les deuxième et troisième colonnes 2, 3 ainsi que l’ossature 5.Thus, a support structure consisting of a frame 5 is provided, the height of which is chosen so that the tank of the third column 3, bolted to the structure, is at the correct height. Frame 5 is elongated, with its axis vertical and it rests on the ground. Preferably, it is mounted on the same platform as the second column 2. Thus this platform is sized to support the second and third columns 2, 3 as well as the frame 5.

Il sera compris que la troisième colonne 3 est disposée à l’intérieur d’une enceinte parallélépipédique isolée thermiquement et des boulons 7 traversent cette enceinte pour attacher l’enceinte contenant la troisième colonne 3 à l’ossature 5.It will be understood that the third column 3 is arranged inside a thermally insulated parallelepiped enclosure and bolts 7 pass through this enclosure to attach the enclosure containing the third column 3 to the frame 5.

La hauteur de la troisième colonne 3 est entre 20 et 40 m et la hauteur de l’ossature 5 fait entre un tiers et la moitié de la hauteur de la troisième colonne 3.The height of the third column 3 is between 20 and 40 m and the height of the frame 5 is between a third and a half of the height of the third column 3.

La troisième colonne 3 comprend un condenseur de tête qui n’est pas illustré, le fluide enrichi en argon étant soutiré en dessous du condenseur.The third column 3 comprises an overhead condenser which is not illustrated, the argon-enriched fluid being withdrawn below the condenser.

monte une autre variante où la séparation de l’argon s’effectue dans deux colonnes 3, 4, la quatrième colonne 4 opérant à la même pression que la troisième colonne 3. La quatrième colonne 4 comprend un condenseur de tête et la troisième colonne 3 fonctionne comme si c’était la partie inférieure de la quatrième colonne. mounts another variant where the separation of the argon is carried out in two columns 3, 4, the fourth column 4 operating at the same pressure as the third column 3. The fourth column 4 comprises a top condenser and the third column 3 works as if it were the bottom part of the fourth column.

La troisième colonne 3 reçoit un débit enrichi en argon de la deuxième colonne 2, comme dans l’exemple précédent et renvoie du liquide de cuve par gravitation à la deuxième colonne 2. Le gaz de tête de la troisième colonne 3 est envoyé en cuve de la quatrième colonne 4 et le liquide de cuve de la quatrième colonne 4 arrive en haut de la troisième colonne 3.The third column 3 receives an argon-enriched flow from the second column 2, as in the previous example, and returns bottom liquid by gravity to the second column 2. The overhead gas from the third column 3 is sent to the bottom of the the fourth column 4 and the bottom liquid from the fourth column 4 arrives at the top of the third column 3.

Le fluide riche en argon est soutiré en tête de la quatrième colonne 4.The argon-rich fluid is drawn off at the top of the fourth column 4.

De cette façon, la troisième colonne 3 et l’ossature 5 peuvent, dans les deux exemples, être transportées séparément. L’ossature 5 peut être montée sur site et ensuite la troisième colonne 3 est posé par-dessus l’ossature et boulonnée en place.In this way, the third column 3 and the framework 5 can, in both examples, be transported separately. Frame 5 can be assembled on site and then the third column 3 is laid over the frame and bolted in place.

Claims (1)

Appareil de séparation d’air par distillation cryogénique comprenant une première colonne (1) opérant à une première pression, une deuxième colonne (2) opérant à une deuxième pression et une troisième colonne (3) opérant à une troisième pression, des moyens pour envoyer de l’air épuré et refroidi se séparer dans la première colonne par distillation cryogénique, des moyens pour envoyer du liquide de cuve enrichi en oxygène de la première colonne à la deuxième colonne, des moyens pour envoyer le liquide de tête de la première colonne de la première colonne à la tête de la deuxième colonne, des moyens pour soutirer un gaz enrichi en azote de la cuve de la deuxième colonne, des moyens pour soutirer un fluide enrichi en oxygène en cuve de la première colonne, les première et deuxième colonnes étant posées côte à côte, ancrées sur le sol, des moyens pour envoyer un gaz enrichi en argon pris dans la deuxième colonne à la troisième colonne et des moyens (6) pour envoyer un liquide de cuve de la troisième colonne vers la deuxième colonne par gravitation, la troisième colonne étant boulonnée (7) à un support (5) en forme d’ossature allongée ayant un axe vertical, l’ossature reposant sur le sol.Cryogenic distillation air separation apparatus comprising a first column (1) operating at a first pressure, a second column (2) operating at a second pressure and a third column (3) operating at a third pressure, means for sending purified and cooled air separating in the first column by cryogenic distillation, means for sending oxygen-enriched bottom liquid from the first column to the second column, means for sending the overhead liquid from the first the first column at the top of the second column, means for drawing off a gas enriched in nitrogen from the bottom of the second column, means for drawing off a fluid enriched in oxygen from the bottom of the first column, the first and second columns being placed side by side, anchored to the ground, means for sending an argon-enriched gas taken from the second column to the third column and means (6) for sending a bottom liquid from the a third column towards the second column by gravity, the third column being bolted (7) to a support (5) in the form of an elongated frame having a vertical axis, the frame resting on the ground.
FR2101068A 2021-02-04 2021-02-04 Apparatus for air separation by cryogenic distillation Active FR3112200B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR2101068A FR3112200B3 (en) 2021-02-04 2021-02-04 Apparatus for air separation by cryogenic distillation

Applications Claiming Priority (2)

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FR2101068 2021-02-04
FR2101068A FR3112200B3 (en) 2021-02-04 2021-02-04 Apparatus for air separation by cryogenic distillation

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