EP1143216A1 - Procédé et appareil de production d'un fluide enrichi en oxygène par distillation cryogénique - Google Patents
Procédé et appareil de production d'un fluide enrichi en oxygène par distillation cryogénique Download PDFInfo
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- EP1143216A1 EP1143216A1 EP01400749A EP01400749A EP1143216A1 EP 1143216 A1 EP1143216 A1 EP 1143216A1 EP 01400749 A EP01400749 A EP 01400749A EP 01400749 A EP01400749 A EP 01400749A EP 1143216 A1 EP1143216 A1 EP 1143216A1
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- Prior art keywords
- argon
- enriched
- flow
- column
- oxygen
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- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
- F25J3/04387—Details relating to the work expansion, e.g. process parameter etc. using liquid or hydraulic turbine expansion
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Definitions
- the present invention relates to a production method and apparatus of a fluid enriched in oxygen by cryogenic distillation of a mixture containing nitrogen, oxygen and argon.
- it relates to a method and an apparatus for separating air by cryogenic distillation allowing the production of pure oxygen, i.e. oxygen containing at least 95% mol. oxygen, preferably at least 98% mol. oxygen or even 99.5% mol. oxygen.
- Patent application EP-A-0540900 describes a production process impure oxygen in which part of the impure argon containing at least 90% of argon from a column of mixture is mixed with the residual nitrogen from a simple column.
- the mixing column operates at the same low pressure as the low column pressure, up to 1.75 bara.
- EP-A-0384213 has a low pressure column operating at between 1.5 and 10 bara but the argon column operates at a lower pressure.
- US-A-4932212 describes the case in which the low pressure column and the argon column operate at pressures between 1 and 2 bars.
- EP-A-0518491 describes a process for the production of nitrogen gas under pressure and incidentally liquid nitrogen, liquid argon and liquid oxygen in which the low pressure column and the argon column operate at a pressure substantially identical above 2.5 bara. No argon gas flow is produced.
- EP-A-0952415 describes an apparatus comprising a double column and a argon column operating with a yield lower than the optimal yield.
- An object of the present invention is to increase the yield of pure oxygen an air separation device.
- Another object of the invention is to provide an air separation device particularly well suited to the demands of large quantities of nitrogen under pressure (typically when integrated with an IGCC gas turbine).
- the flow enriched in argon or the flow enriched in argon mixed with a gas enriched in nitrogen can be sent upstream of the expansion machine of a gas turbine.
- the flow enriched in argon can contain between 10 and 95 mol%. argon (or between 40 and 95% mol. argon), between 2 and 40.% mol of oxygen and between 2 and 40% mol. nitrogen.
- the flow enriched in argon which is released to the atmosphere and / or which is used to regenerate adsorbent beds or reversible exchangers and / or which is mixed with a gas enriched in nitrogen from the device and / or another device and / or which is sent upstream of the expansion machine of a gas turbine can constitute between 0.3 and 2% of the air, preferably between 0.5 and 1% of the air. For this reason, it is best to mix the flow enriched in argon with a gas enriched in nitrogen containing at least 90% mol.
- the mixture formed comprises less than 2% mol. argon, preferably less than 1% mol. argon.
- the low pressure column can operate between 2 and 10 bara, preferably above 2.5 bara.
- the apparatus may include an auxiliary separation column a flow containing at least argon and oxygen and two other columns, of which a high pressure column and a low pressure column thermally connected between them, the auxiliary column being supplied from the low pressure column.
- the apparatus may include an auxiliary separation column of a flow rate containing at least argon and oxygen and at least three others columns, including a high pressure column, an intermediate pressure column and a low pressure column thermally connected to each other, the auxiliary column being supplied from the low pressure column or the intermediate pressure column.
- an integrated method of separation comprising a method according to one of claims 1 to 12 in which a nitrogen-enriched gas is sent from the operating column preferably at the lowest pressure at the gas turbine, after one step possible compression and, optionally, a fluid enriched with oxygen is sent from an appliance column to a gasifier.
- the auxiliary column contains between 30 and 40 trays theoretical.
- the separation of oxygen and argon in the low pressure column tank is facilitated.
- the fluid enriched in argon withdrawn from the auxiliary column is not necessarily an end product of the device but can be used to cool flows re-entering the columns or supplying frigories by expansion.
- Figure 1 is a diagram of an oxygen production apparatus according to the invention using a double column.
- Figure 2 is a diagram of an oxygen production apparatus according to the invention using a triple column.
- an air flow 1 of 1000Nm3 / h is purified by beds adsorbent 4 is divided into two.
- the flow 2 is boosted at a higher pressure, sent to the heat exchanger 3 where it cools ensuring the vaporization of liquid oxygen and then to a hydraulic turbine 5 where it comes out at least partially liquid.
- This liquid (or two-phase mixture) 7 is sent to the column high pressure 9 operating between 14 and 15 bar and possibly partly at the column low pressure 11 operating between 4 and 6 bar (or even between 2 and 10 bar), either sending part of the capacity liquid upstream of the medium pressure column either by withdrawing a flow having a composition similar to that of the liquid air of the high pressure column 9, as shown in Figure 1.
- the device may include an insufflation turbine which serves during start-up or a low-pressure nitrogen turbine 55.
- a flow of rich liquid 15 is withdrawn from the high pressure column and sent to the sub-cooler 17, divided in two and sent in part to the lower column pressure, after expansion in the valve 21 and in part at the head condenser 23 of the auxiliary column 25 after expansion in the valve 27. At least the rich liquid partially vaporized in the overhead condenser is sent to the lower column pressure 11. If the vaporization is partial, a liquid flow and a gas flow are sent from the condenser to the low pressure column.
- a nitrogen gas flow 19 can optionally be withdrawn from the head of the high pressure column 9.
- the auxiliary column is supplied by a gas flow 29 containing between 5 and 15% mol. argon, preferably around 7 mol%. argon.
- the tank liquid 31 of the auxiliary column is returned to the low pressure column which operates substantially at the same pressure as the auxiliary column.
- the auxiliary column 25 can alternatively be supplied with a liquid flow containing between 5 and 15 mol%. argon, preferably around 7 mol%. argon.
- column 25 will have a tank reboiler, heated by a gas flow such as air or nitrogen from the high pressure column 9.
- a liquid air flow 33 and a lean liquid flow 35 are sent from the high pressure column 9 to low pressure column 11, after having been sub-cooled in the sub-cooler 17 and expanded in valves.
- a liquid oxygen flow 37 containing 99.5% mol. oxygen is drawn in low pressure column tank, pressurized by a pump 39 and vaporized in the exchanger 3.
- the mixture 53 heats up in the sub-cooler 17 then heats up in the exchanger 3.
- the mixture can then be discharged into the atmosphere and / or can be used to regenerate the adsorbent beds 4 or reversible exchangers and / or sent in upstream of the expansion machine 51 of a gas turbine after a step of compression.
- part of the mixture 53 can be expanded in a turbine 55 (dotted line).
- a triple column is used in place of the double column of Figure 1.
- An air flow 1 is purified by adsorbent beds 4 is divided into two.
- Flow 2 is boosted to a higher pressure, sent to the heat exchanger heat 3 where it cools by ensuring the vaporization of liquid oxygen and then at a hydraulic turbine 5 where it exits in at least partially liquid form.
- This liquid (or two-phase mixture) 7 is sent to the high pressure column 9 operating between 14 and 15 bar and possibly partly at the low pressure column 11 operating between 4 and 6 bar and / or possibly at the intermediate pressure column 40 operating between 7 and 9 bar, either by sending part of the liquid of a capacity upstream of the middle column pressure either by withdrawing a flow having a composition similar to that of liquid air of the high pressure column 9, as shown in FIG. 2.
- the device may include an insufflation turbine which serves during start-up or a low-pressure nitrogen turbine 55.
- a flow of rich liquid 15 is withdrawn from the high pressure column and sent to the sub-cooler 17, divided in two and sent partly to the middle of the column operating at intermediate pressure 40, after expansion in valve 21 and partly at head condenser 23 of the auxiliary column 25 after expansion in the valve 27.
- the at least partially vaporized rich liquid in the overhead condenser is sent to the low pressure column 11. If the vaporization is partial, a liquid flow and a flow gases are sent from the condenser to the low pressure column.
- a nitrogen gas flow 19 can optionally be withdrawn from the head of the high pressure column 9.
- the auxiliary column is supplied with part of a gas flow 29 containing between 5 and 15 mol%. argon, preferably around 7 mol%. argon.
- the liquid tank 31 of the auxiliary column is returned to the low pressure column which operates at substantially the same pressure as the auxiliary column.
- the auxiliary column 25 can alternatively be supplied with a liquid flow containing between 5 and 15 mol%. argon, preferably around 7 mol%. argon.
- column 25 will have a tank reboiler, heated by a gas flow such as air or nitrogen from the high pressure column 9.
- the rest of the gas flow 29 is used to heat the tank reboiler 41 of the column 40 and after condensation is returned to the low pressure column with the flow rate 31.
- the tank liquid 43 of the column 40 is partly sent directly to the low pressure column and partly to the condenser at the top of column 40 where it at least partially vaporizes before being sent to the low pressure column at its tower.
- the overhead liquid 47 of the column 40 is sub-cooled in the exchanger 17, expanded, mixed with expanded flow 35 and sent to the top of the lower column pressure.
- a liquid air flow 33 and a lean liquid flow 35 are sent from the high pressure column 9 to low pressure column 11, after having been sub-cooled in the sub-cooler 17 and expanded in valves.
- a liquid oxygen flow 37 containing 99.5% mol. oxygen is drawn in low pressure column tank, pressurized by a pump 39 and vaporized in the exchanger 3.
- the mixture 53 heats up in the sub-cooler 17 then heats up in the exchanger 3.
- the mixture can then be discharged into the atmosphere and / or can be used to regenerate the adsorbent beds 4 or reversible exchangers and / or sent in upstream of the expansion machine 51 of a gas turbine after a step of possible compression.
- part of the mixture 53 can be expanded in a turbine 55 (dotted line).
- the method according to the invention is of particular interest in the case in which the nitrogen in the low pressure column is valued, for example by sending it to an expansion machine 51 of a gas turbine.
- at least part of the air 1 can come from compressor 53 of the gas turbine and the oxygen produced by the device distillation can be used for the gasification necessary to produce the fuel for the gas turbine.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
Claims (16)
- Procédé de production d'un débit enrichi en oxygène dans un appareil de distillation cryogénique comprenant les étapes de :a) refroidir un débit d'alimentation (1) comprenant de l'oxygène, de l'azote et de l'argon et introduire ce débit dans un appareil de distillation comprenant une colonne auxiliaire (25) de séparation d'un débit (29) contenant au moins de l'argon et de l'oxygène et au moins deux autres colonnes (9,11) ;b) séparer ce débit par distillation cryogénique dans l'appareil afin de former des fluides enrichis en oxygène et en azote (15,33,35) ;c) envoyer le débit contenant au moins de l'argon et de l'oxygène d'une des autres colonnes à la colonne auxiliaire, la colonne auxiliaire opérant substantiellement à la même pression que la colonne (11) dont provient le débit contenant au moins de l'argon et de l'oxygène, cette pression étant entre 2 et 10 bars absolus ;d) soutirer un débit enrichi en oxygène (37), contenant au moins 95 %mol. d'oxygène d'une colonne de l'appareil ;e) soutirer un débit enrichi en argon (49)de la colonne auxiliaire ;
- Procédé selon la revendication 1 dans lequel le débit enrichi en argon (49) contient entre 10 et 95 % mol. d'argon.
- Procédé selon la revendication 2 dans lequel le débit enrichi en argon (49)contient entre 40 et 95 % mol. d'argon.
- Procédé selon la revendication 1 ou 2 dans lequel le débit enrichi en argon (49) contient entre 2 et 40 % mol. d'oxygène.
- Procédé selon l'une des revendications précédentes dans lequel au moins une partie du débit enrichi en argon (49) est rejetée à l'atmosphère, éventuellement après l'avoir mélangé avec un gaz enrichi en azote de l'appareil.
- Procédé selon l'une des revendications précédentes dans lequel au moins une partie du débit enrichi en argon (49) sert à régénérer des lits d'adsorbants (4) ou des échangeurs réversibles, éventuellement après l'avoir mélangé avec un gaz enrichi en azote de l'appareil.
- Procédé selon l'une des revendications précédentes dans lequel au moins une partie du débit enrichi en argon (49) envoyée en amont de la machine de détente (51) d'une turbine à gaz,. éventuellement après l'avoir mélangé avec un gaz enrichi en azote de l'appareil.
- Procédé selon l'une des revendications 1 à 7 dans lequel tout le débit enrichi en argon (49) est rejeté à l'atmosphère et/ou sert à régénérer des lits d'adsorbants ou des échangeurs réversibles et/ou sert de produit final éventuellement après s'être mélangé avec un gaz enrichi en azote de l'appareil.
- Procédé selon l'une des revendications 1 à 8 dans lequel il y a production d'un fluide enrichi en argon comme produit final.
- Procédé selon l'une des revendications précédentes dans lequel au moins une partie du débit (49) enrichi en argon est envoyée à une turbine de détente (53) ou une vanne de détente, éventuellement après avoir été mélangé avec un débit gazeux enrichi en azote.
- Procédé selon l'une des revendications précédentes dans lequel l'appareil comprend une colonne auxiliaire (25) de séparation d'un débit contenant au moins de l'argon et de l'oxygène et deux autres colonnes, dont une colonne haute pression (9) et une colonne basse pression (11) reliées thermiquement entre elles, la colonne auxiliaire étant alimentée à partir de la colonne basse pression.
- Procédé selon l'une des revendications 1 à 10 dans lequel l'appareil comprend une colonne auxiliaire (25) de séparation d'un débit contenant au moins de l'argon et de l'oxygène et au moins trois autres colonnes, dont une colonne haute pression (9), une colonne pression intermédiaire (40) et une colonne basse pression (11) reliées thermiquement entre elles, la colonne auxiliaire étant alimentée à partir de la colonne basse pression ou la colonne pression intermédiaire.
- Procédé intégré de séparation d'air et de production d'énergie comprenant un procédé selon la revendication 7 dans lequel on envoie un fluide enrichi en oxygène d'une colonne de l'appareil à un gazéifieur ou au moins une partie de l'air destiné à l'appareil de distillation provient d'un compresseur (53) de la turbine à gaz.
- Appareil de production d'oxygène par distillation cryogénique comprenant :a) une colonne auxiliaire (25) et au moins deux autres colonnes(9,11);b) des moyens pour envoyer un débit (1) contenant de l'oxygène, de l'azote et de l'argon à une des autres colonnes ;c) des moyens pour soutirer un débit enrichi en oxygène (37) d'une des autres colonnes ;d) des moyens pour soutirer un débit (29)contenant au moins de l'argon et de l'oxygène d'une des autres colonnes et des moyens pour envoyer ce débit comme alimentation à la colonne auxiliaire (25) ;e) des moyens pour soutirer un fluide enrichi en argon de la colonne auxiliaire ;
- Appareil selon la revendication 14 dans lequel il n'y a pas de moyen de détente entre la colonne (11) alimentant la colonne auxiliaire et la colonne auxiliaire (25).
- Appareil selon la revendication 14 ou 15 comprenant des moyens pour envoyer tout le fluide enrichi en argon à l'atmosphère ou des moyens pour mélanger tout le fluide enrichi en argon avec un gaz enrichi de l'appareil ou un autre appareil.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0004284 | 2000-04-04 | ||
FR0004284A FR2807150B1 (fr) | 2000-04-04 | 2000-04-04 | Procede et appareil de production d'un fluide enrichi en oxygene par distillation cryogenique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1143216A1 true EP1143216A1 (fr) | 2001-10-10 |
EP1143216B1 EP1143216B1 (fr) | 2012-03-07 |
Family
ID=8848848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP01400749A Expired - Lifetime EP1143216B1 (fr) | 2000-04-04 | 2001-03-22 | Procédé et appareil de production d'un fluide enrichi en oxygène par distillation cryogénique |
Country Status (6)
Country | Link |
---|---|
US (1) | US6434973B2 (fr) |
EP (1) | EP1143216B1 (fr) |
JP (1) | JP2001349669A (fr) |
AT (1) | ATE548619T1 (fr) |
ES (1) | ES2382453T3 (fr) |
FR (1) | FR2807150B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1249676B1 (fr) * | 2001-04-10 | 2005-11-02 | L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude | Procédé d'alimentation en azote impur de la chambre de combustion d'une turbine à gaz combinée à une unité de distillation d'air |
WO2016146246A1 (fr) * | 2015-03-13 | 2016-09-22 | Linde Aktiengesellschaft | Système permettant de produire de l'oxygène par fractionnement d'air à basse température |
Families Citing this family (10)
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US6546748B1 (en) * | 2002-06-11 | 2003-04-15 | Praxair Technology, Inc. | Cryogenic rectification system for producing ultra high purity clean dry air |
FR2874249A1 (fr) * | 2004-08-10 | 2006-02-17 | Air Liquide | Procede et installation de separation d'air par distillation cryogenique |
US20070095100A1 (en) * | 2005-11-03 | 2007-05-03 | Rankin Peter J | Cryogenic air separation process with excess turbine refrigeration |
FR2913758B3 (fr) * | 2007-03-12 | 2009-11-13 | Air Liquide | Procede et appareil de separation d'air par distillation cryogenique |
FR2930629B1 (fr) * | 2008-04-23 | 2010-05-07 | Air Liquide | Appareil et procede de separation d'air par distillation cryogenique |
US20110138856A1 (en) * | 2009-12-10 | 2011-06-16 | Henry Edward Howard | Separation method and apparatus |
EP2634517B1 (fr) * | 2012-02-29 | 2018-04-04 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Procédé et appareil pour la séparation d'air par distillation cryogénique |
EP2713128A1 (fr) * | 2012-10-01 | 2014-04-02 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Processus pour la séparation de l'air par distillation cryogénique |
FR3074274B1 (fr) * | 2017-11-29 | 2020-01-31 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation d'air par distillation cryogenique |
US20240035740A1 (en) * | 2022-07-28 | 2024-02-01 | Neil M. Prosser | Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column |
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Also Published As
Publication number | Publication date |
---|---|
JP2001349669A (ja) | 2001-12-21 |
ATE548619T1 (de) | 2012-03-15 |
ES2382453T3 (es) | 2012-06-08 |
FR2807150A1 (fr) | 2001-10-05 |
FR2807150B1 (fr) | 2002-10-18 |
EP1143216B1 (fr) | 2012-03-07 |
US20010052243A1 (en) | 2001-12-20 |
US6434973B2 (en) | 2002-08-20 |
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