EP2132509A2 - Procédé et appareil de séparation d'air par distillation cryogénique - Google Patents

Procédé et appareil de séparation d'air par distillation cryogénique

Info

Publication number
EP2132509A2
EP2132509A2 EP08762127A EP08762127A EP2132509A2 EP 2132509 A2 EP2132509 A2 EP 2132509A2 EP 08762127 A EP08762127 A EP 08762127A EP 08762127 A EP08762127 A EP 08762127A EP 2132509 A2 EP2132509 A2 EP 2132509A2
Authority
EP
European Patent Office
Prior art keywords
pressure column
column
subcooler
medium
medium pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08762127A
Other languages
German (de)
English (en)
Other versions
EP2132509B1 (fr
Inventor
Patrice Cavagne
Alain Guillard
Xavier Pontone
Delphine Vallier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to PL08762127T priority Critical patent/PL2132509T3/pl
Publication of EP2132509A2 publication Critical patent/EP2132509A2/fr
Application granted granted Critical
Publication of EP2132509B1 publication Critical patent/EP2132509B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F25J3/04763—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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/52—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen enriched compared to air ("crude oxygen")

Definitions

  • the invention relates to a method and apparatus for air distillation by cryogenic distillation.
  • it relates to an apparatus using a double air separation column comprising a medium pressure column and a low pressure column, thermally connected together by a reboiler-condenser.
  • EP-A-1078212 discloses an apparatus where a heat exchanger is positioned below the low pressure column, which is placed next to the medium pressure column.
  • an air separation apparatus comprising a main exchange line, a first elongate member comprising the medium pressure column of a double column, surmounted by a reboiler-condenser and an auxiliary column containing at least one theoretical plate constituting the lower part of the low pressure column, a second elongated element constituting the remainder of the low pressure column, means for sending air from the main exchange line to the medium-pressure column, means for sending a head gas from the medium-pressure column to the reboiler-condenser, means for sending the condensed overhead gas from the reboiler to the medium pressure column, means for sending a head gas from the reboiler; column auxiliary to the tank of the second elongate member, means for sending a tank liquid of the second elongate member at the head of the auxiliary column, a sub-cooler placed below the first or second elongated member, means for supplying a bottom liquid from the medium pressure column to the subcooler
  • the subcooler is placed below the second elongate member.
  • the subcooler and the second elongated element may be placed in a package whose length does not exceed 35 meters or even 30 meters.
  • This configuration optimally occupies the volume of the cold box by: balancing the heights of the two column sections, placing the subcooler intelligently to optimize the section of the cold box, leaving the medium pressure column on the ground allowing a power supply two-phase air in charge on the column,
  • An air separation apparatus comprises a first elongate element A and a second elongate element B.
  • the first elongate element A comprises the middle pressure column 1 of a double column surmounted by a condensing reboiler 5. Above this reboiler is an auxiliary column containing a few theoretical trays of cross-corrugated structured packing constituting the lower part 2 of the low pressure column.
  • the second elongated element B is composed of the remainder of the low pressure column 3 also containing corrugated-structured structured packings.
  • the apparatus comprises means 11 for sending purified compressed air and cooled in the main exchange line, the medium pressure column. Nitrogen from the top of the column is sent to the reboiler 5 where it condenses.
  • Oxygen gas 17 is withdrawn from the bottom of the auxiliary column. From the head of the auxiliary column, an oxygen-enriched gas is withdrawn and sent to the bottom of the column 3. A tank liquid 13 of the column 3 is sent to the top of the auxiliary column 2 after having been pressurized in a pump P.
  • the first elongated element is placed at ground level.
  • the second elongate element is raised by means of a metal frame, this frame itself being placed at ground level. This chassis serving at the same time support the sub cooler.
  • the pump P is also disposed at ground level. In this way, the heads of the auxiliary column 2 and the second elongated element are substantially at the same level.
  • rich liquid from the medium pressure column vessel cools before being fed to the second elongate member.
  • one or more nitrogen-enriched liquids from the head of the medium-pressure column can cool thereon before being sent to the head of the second elongate member.
  • At least one overhead gas of the second elongate member is heated in the subcooler prior to being sent to the main exchange line.

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

Un appareil de séparation d'air comprend un premier élément (A) de forme allongée comprenant la colonne moyenne pression (1) d'une double colonne, surmontée d'un rebouilleur-condenseur (5) et d'une colonne auxiliaire (2) contenant au moins un plateau théorique constituant la partie inférieure de la colonne basse pression, un deuxième élément (B) de forme allongée constituant le restant de la colonne basse pression, des moyens (11) pour envoyer de l'air de la ligne d'échange principale à la colonne moyenne pression et un sous-refroidisseur (6) placé en dessous du premier ou du deuxième élément de forme allongée, des moyens pour envoyer un liquide de cuve (13) de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongé et/ou des moyens pour envoyer un liquide de la tête de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongée et des moyens pour envoyer un gaz de tête du deuxième élément de forme allongée au sous-refroidisseur.

Description

Procédé et appareil de séparation d'air par distillation cryogénique
L'invention est relative à un procédé et à un appareil pour distillation d'air par distillation cryogénique. En particulier, elle concerne un appareil utilisant une double colonne de séparation d'air comprenant une colonne moyenne pression et une colonne basse pression, reliées thermiquement entre elles par un rebouilleur-condenseur.
EP-A-1078212 décrit un appareil où un échangeur de chaleur est positionné en dessous de la colonne basse pression, celle-ci étant placée à côté de la colonne moyenne pression.
Selon la présente invention, il est prévu un appareil de séparation d'air comprenant une ligne d'échange principale, un premier élément de forme allongée comprenant la colonne moyenne pression d'une double colonne, surmontée d'un rebouilleur-condenseur et d'une colonne auxiliaire contenant au moins un plateau théorique constituant la partie inférieure de la colonne basse pression, un deuxième élément de forme allongée constituant le restant de la colonne basse pression, des moyens pour envoyer de l'air de la ligne d'échange principale à la colonne moyenne pression, des moyens pour envoyer un gaz de tête de la colonne moyenne pression au rebouilleur-condenseur, des moyens pour envoyer le gaz de tête condensé du rebouilleur à la colonne moyenne pression, des moyens pour envoyer un gaz de tête de la colonne auxiliaire à la cuve du deuxième éléments de forme allongée, des moyens pour envoyer un liquide de cuve du deuxième élément de forme allongée en tête de la colonne auxiliaire, un sous-refroidisseur placé en dessous du premier ou du deuxième élément de forme allongée, des moyens pour envoyer un liquide de cuve de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongée et/ou des moyens pour envoyer un liquide de la tête de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongée, des moyens pour envoyer un gaz de tête du deuxième élément de forme allongée au sous-refroidisseur.
De préférence le sous-refroidisseur est placé en dessous du deuxième élément de forme allongée. Le sous-refroidisseur et le deuxième élément de forme allongée peuvent être placés dans un paquet dont la longueur ne dépasse pas 35 mètres, voire 30 mètres.
Cette configuration permet d'occuper au mieux le volume de la boîte froide en : équilibrant les hauteurs des deux sections de colonnes, plaçant le sous-refroidisseur intelligemment pour optimiser la section de la boîte froide, laissant la colonne moyenne pression au sol permettant une alimentation de l'air diphasique en charge sur la colonne,
- assurant une bonne mise en charge du liquide sur la pompe de remontée de liquide,
- permettant d'avoir une boîte froide incluant tronçon parallèle et minaret d'une hauteur inférieure à 35m, voire 30m tout en utilisant des garnissages structurés ondulés-croisés.
L'invention sera décrite en plus de détails en se référant au dessin qui montre un appareil de séparation d'air selon l'invention.
Un appareil de séparation d'air comprend un premier élément de forme allongée A et un deuxième élément de forme allongée B. Le premier élément de forme allongée A comprend la colonne moyenne pression 1 d'une double colonne surmonté d'un rebouilleur condenseur 5. Au-dessus de ce rebouilleur se trouve une colonne auxiliaire contenant quelques plateaux théoriques de garnissages structurés ondulés-croisés, constituant la partie inférieure 2 de la colonne basse pression. Le deuxième élément de forme allongée B est composé du restant de la colonne basse pression 3 contenant également des garnissages structurés ondulé-croisés.
En dessous du deuxième élément se trouve un sous-refroidisseur 6. L'appareil comprend des moyens 11 pour envoyer de l'air comprimé épuré et refroidi dans la ligne d'échange principale, à la colonne moyenne pression. De l'azote de la tête de la colonne est envoyé au rebouilleur 5 où il se condense.
De l'oxygène gazeux 17 est soutiré en cuve de la colonne auxiliaire. De la tête de la colonne auxiliaire, un gaz 15 enrichi en oxygène est soutiré et envoyé en cuve de la colonne 3. Un liquide de cuve 13 de la colonne 3 est envoyé en tête de la colonne auxiliaire 2 après avoir été pressurisé dans une pompe P. Le premier élément de forme allongée est posé au niveau du sol. Le deuxième élément de forme allongée est surélevé au moyen d'un châssis métallique, ce châssis étant lui même posé au niveau du sol. Ce châssis servant par la même occasion de support au sous refroidisseur . La pompe P est également disposée au niveau du sol. De cette manière, les têtes de la colonne auxiliaire 2 et du deuxième élément de forme allongée se trouvent substantiellement au même niveau.
Dans le sous-refroidisseur, du liquide riche de la cuve de la colonne moyenne pression se refroidit avant d'être envoyé au deuxième élément de forme allongée. De même, un ou plusieurs liquides enrichis en azote provenant de la tête de la colonne moyenne pression peuvent s'y refroidir avant d'être envoyé(s) en tête du deuxième élément de forme allongée.
Au moins un gaz de tête du deuxième élément de forme allongée se réchauffe dans le sous-refroidisseur avant d'être envoyé à la ligne d'échange principale.

Claims

REVENDICATIONS
1. Appareil de séparation d'air comprenant une ligne d'échange principale, un premier élément de forme allongée (A) comprenant la colonne moyenne pression (1) d'une double colonne, surmontée d'un rebouilleur- condenseur (5) et d'une colonne auxiliaire (2) contenant au moins un plateau théorique constituant la partie inférieure de la colonne basse pression, un deuxième élément (B) de forme allongée constituant le restant de la colonne basse pression, des moyens (11 ) pour envoyer de l'air de la ligne d'échange principale à la colonne moyenne pression, des moyens pour envoyer un gaz de tête de la colonne moyenne pression au rebouilleur-condenseur, des moyens pour envoyer le gaz de tête condensé du rebouilleur à la colonne moyenne pression, des moyens pour envoyer un gaz de tête (15) de la colonne auxiliaire à la cuve du deuxième élément de forme allongée, des moyens pour envoyer un liquide de cuve (13) du deuxième élément de forme allongée en tête de la colonne auxiliaire, un sous-refroidisseur (6) placé en dessous du premier ou du deuxième élément de forme allongée, des moyens pour envoyer un liquide de cuve de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongée et/ou des moyens pour envoyer un liquide de la tête de la colonne moyenne pression au sous-refroidisseur et ensuite au deuxième élément de forme allongée et des moyens pour envoyer un gaz de tête du deuxième élément de forme allongée au sous-refroidisseur.
2. Appareil selon la revendication 1 dans lequel le sous-refroidisseur (6) est placé en dessous du deuxième élément (B) de forme allongée.
3. Appareil selon la revendication 2 dans lequel le sous-refroidisseur (6) et le deuxième élément de forme allongée (B) sont placés dans un paquet dont la longueur ne dépasse pas 35 mètres, voire 30 mètres.
EP08762127.2A 2007-03-12 2008-02-20 Procédé et appareil de séparation d'air par distillation cryogénique Active EP2132509B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08762127T PL2132509T3 (pl) 2007-03-12 2008-02-20 Sposób i urządzenie do rozdzielania powietrza z wykorzystaniem destylacji kriogenicznej

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0753767A FR2913758B3 (fr) 2007-03-12 2007-03-12 Procede et appareil de separation d'air par distillation cryogenique
FR0756022A FR2918162A1 (fr) 2007-03-12 2007-06-26 Procede et appareil de separation d'air par distillation cryogenique
PCT/FR2008/050280 WO2008110732A2 (fr) 2007-03-12 2008-02-20 Procédé et appareil de séparation d'air par distillation cryogénique

Publications (2)

Publication Number Publication Date
EP2132509A2 true EP2132509A2 (fr) 2009-12-16
EP2132509B1 EP2132509B1 (fr) 2018-06-27

Family

ID=39760146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08762127.2A Active EP2132509B1 (fr) 2007-03-12 2008-02-20 Procédé et appareil de séparation d'air par distillation cryogénique

Country Status (10)

Country Link
US (1) US20100139318A1 (fr)
EP (1) EP2132509B1 (fr)
JP (1) JP2010521646A (fr)
CN (1) CN102016467A (fr)
BR (1) BRPI0807965A2 (fr)
FR (2) FR2913758B3 (fr)
PL (1) PL2132509T3 (fr)
RU (1) RU2479805C2 (fr)
TR (1) TR201810844T4 (fr)
WO (1) WO2008110732A2 (fr)

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DE102010012920A1 (de) 2010-03-26 2011-09-29 Linde Aktiengesellschaft Vorrichtung zur Tieftemperaturzerlegung von Luft
CN209524679U (zh) * 2018-10-29 2019-10-22 乔治洛德方法研究和开发液化空气有限公司 通过低温蒸馏来蒸馏空气的设备
CN117980679A (zh) * 2021-09-01 2024-05-03 林德有限责任公司 用于低温空气分离的设施和方法

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Also Published As

Publication number Publication date
EP2132509B1 (fr) 2018-06-27
US20100139318A1 (en) 2010-06-10
JP2010521646A (ja) 2010-06-24
FR2913758B3 (fr) 2009-11-13
WO2008110732A2 (fr) 2008-09-18
RU2009137584A (ru) 2011-04-20
WO2008110732A3 (fr) 2010-03-11
FR2913758A1 (fr) 2008-09-19
CN102016467A (zh) 2011-04-13
FR2918162A1 (fr) 2009-01-02
TR201810844T4 (tr) 2018-08-27
RU2479805C2 (ru) 2013-04-20
PL2132509T3 (pl) 2018-11-30
BRPI0807965A2 (pt) 2014-06-10

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