EP1189003B1 - Procédé et installation de séparation d'air par distillation cryogénique - Google Patents
Procédé et installation de séparation d'air par distillation cryogénique Download PDFInfo
- Publication number
- EP1189003B1 EP1189003B1 EP01402310A EP01402310A EP1189003B1 EP 1189003 B1 EP1189003 B1 EP 1189003B1 EP 01402310 A EP01402310 A EP 01402310A EP 01402310 A EP01402310 A EP 01402310A EP 1189003 B1 EP1189003 B1 EP 1189003B1
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- EP
- European Patent Office
- Prior art keywords
- pressure column
- low
- column
- pressure
- oxygen
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000926 separation method Methods 0.000 title claims description 9
- 238000004821 distillation Methods 0.000 title claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 93
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000001301 oxygen Substances 0.000 claims abstract description 49
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 49
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 38
- 229910052786 argon Inorganic materials 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 39
- 239000006200 vaporizer Substances 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Images
Classifications
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- 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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- 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
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
- F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04309—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
-
- 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
- F25J3/04436—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 at least a triple pressure main column system
- F25J3/04448—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 at least a triple pressure main column system in a double column flowsheet with an intermediate pressure column
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- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/20—Processes or apparatus using separation by rectification in an elevated pressure multiple column system wherein the lowest pressure column is at a pressure well above the minimum pressure needed to overcome pressure drop to reject the products to atmosphere
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- 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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
- F25J2240/10—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being air
Definitions
- the present invention relates to a method and an installation of air separation by cryogenic distillation according to the preamble of claims 1 and 9, respectively.
- Such a process and such installation are known from US-A-5,657,644.
- An object of the invention is to reduce the energy consumption of the process separation from the prior art methods.
- Another object of the invention is to produce oxygen with a purity of minus 95 mol%, or even at least 98 mol%. with improved performance.
- Figure 1 shows a conventional method with a low pressure column 103 operating at 1.3 bara to make oxygen at 99.5 mol%. with a 92% yield.
- a flow rate of 1000 Nm 3 / h of air 1 at approximately 5 bara is divided in two to form a first flow 17 and a second flow 3 which is supercharged in a booster 5 at a higher pressure of the order of 75 bara. .
- Both flow rates 3.17 cool through crossing a heat exchanger 100.
- flow 17 is sent to the tank of the high pressure column 101 and the liquefied flow 3 in the exchanger 100 is expanded in a turbine 6 producing a flow at least partially liquid at its outlet, the fluid or mixture of fluids leaving the turbine 6 being sent at least in part to the high pressure column 101.
- a flow of rich liquid 10 from the high pressure column 101 cools in the subcooler 83 before being relaxed and sent to an intermediate level of the low pressure column 103.
- a liquid air flow 12 is withdrawn from the high pressure column 101, cooled in the subcooler 83, expanded and sent to the low pressure column 103.
- a flow of residual nitrogen 72 is withdrawn at the top of the low pressure column 103, sent to the subcooler 83 and then to the exchanger 100 where it heats up.
- a flow rate of 193 Nm 3 / h of oxygen at 99.5 mol%. is withdrawn in liquid form from the low pressure column 103, pumped into the pump 19 to 40 bara and vaporizes in the exchanger 100 to form a gas flow under pressure.
- a flow rate of 200 Nm 3 / h of nitrogen gas 33 is withdrawn from the top of the high pressure column 101 and is partially heated in the exchanger 100. At an intermediate temperature, part of the gas is expanded in a turbine 35 before to be mixed with the waste gas 72.
- a flow rate of 1000 Nm 3 / h of air 1 to about 14.3 bara is divided in two to form a first flow 17 and a second flow 3 which is supercharged in a booster 5 at a higher pressure of the order of 75 bara.
- Both flow rates 3.17 cool through crossing a heat exchanger 100.
- flow 17 is sent to the tank of the high pressure column 101 and the liquid flow 3 is expanded in a turbine 6 producing a flow at least rectally liquid at its outlet, the fluid or mixture of fluids leaving the turbine 6 being sent at least part of the high pressure column 101.
- a flow of rich liquid 10 from the high pressure column 101 cools in the subrefroder 83 before being relaxed and sent to an intermediate level of the low pressure column 103.
- a liquid air flow 12 is withdrawn from the high pressure column 101, cooled in the subcooler 83, expanded and sent to the low pressure column 103.
- a flow of residual nitrogen 72 is withdrawn at the top of the low pressure column 103, sent to the subcooler 83 and then to the exchanger 100 where it heats up.
- a flow 31 of 164 Nm 3 / h of oxygen at 99.5 mol%. is withdrawn in liquid form from the low pressure column, pumped into the pump 19 to 40 bara and vaporizes in the exchanger 100 to form a gas flow under pressure.
- a separation installation of air by cryogenic distillation comprising a high pressure column, a column at intermediate pressure having a bottom reboiler and a low pressure column, the high pressure column and the low pressure column being thermally connected between them, means for sending a mixture of at least oxygen, nitrogen and argon at least to the high pressure column, means for sending a flow enriched with oxygen from the high pressure column to the intermediate pressure column, means for sending an oxygen-enriched fluid and / or a nitrogen-enriched fluid from the intermediate pressure column to the low pressure column, means for send a fluid from the low pressure column to the bottom reboiler of the column to intermediate pressure, means for withdrawing a nitrogen-enriched fluid and a fluid enriched with oxygen in the low pressure column, characterized in that it does not include means for enriching argon with a fluid containing between 3 and 20 mol% argon other than high pressure, low pressure and pressure columns intermediate.
- the fluid sent to the reboiler is withdrawn from the column low pressure at a level lower than the level of the introduction of a fluid enriched in oxygen from the intermediate pressure column.
- the intermediate pressure column has a head condenser.
- the fluids known as 'enriched in oxygen' or 'enriched in nitrogen' are enriched in these components compared to air.
- the apparatus operates with a low column pressure at 1.3 bara and in the case of Figure 4, the apparatus operates with a low pressure column at 4.8 bara.
- the installation of Figure 3 includes a high pressure column 101 operating at 5 bara, an intermediate pressure column 102 operating at 2.7 bara and a low pressure column 103 operating at 1.3 bara.
- Part of the nitrogen gas head of the high pressure column is used to heat the bottom reboiler of the column pressure but other means of heating can be envisaged, such as double reboiler systems, one heated by air.
- a flow rate of 1000 Nm 3 / h of air 1 at approximately 5 bara is divided in two to form a first flow 17 and a second flow 3 which is supercharged in a booster 5 at a higher pressure of the order of 75 bara. .
- Both flow rates 3.17 cool through crossing a heat exchanger 100.
- flow 17 is sent to the tank of the high pressure column 101 without being relaxed or compressed and the liquid flow 3 is expanded in a turbine 6 producing a flow rate at less partially liquid at its outlet, the fluid or mixture of fluids leaving the turbine 6 being sent at least in part to the high pressure column 101.
- a flow of rich liquid 10 from the high pressure column 101 cools in the subcooler 83 before being relaxed and sent to an intermediate level of the intermediate pressure column 102 between two sections, for example of structured packings of corrugated-cross type.
- the liquid can be sent to another level of the column and the column can also receive a gaseous air flow or liquid.
- This liquid is separated into a second oxygen-enriched liquid 20 and a nitrogen-enriched liquid 25.
- the liquid 25 cools in the subcooler 83, before to be relaxed and sent to the top of the low pressure column 103, after being mixed with a poor liquid flow 15 from the top of the high pressure column 101 which was also cooled in the subcooler 83 and relaxed in a valve.
- the bottom liquid of the intermediate pressure column is divided into two. Part is relaxed and sent to the low pressure column directly while the rest is expanded in a valve, sent to the head condenser 29 of the intermediate pressure column where it vaporizes at least partially before to be sent to the low pressure column 103.
- a liquid air flow 12 is withdrawn from the high pressure column, cooled in the subcooler 83, expanded and sent to the low pressure column 103.
- the reboiler 24 of the intermediate pressure column 102 is heated by means of an argon-enriched gas flow 233 containing about 5 to 15% mol., preferably between 8 and 10 mol%. argon from the lower column pressure 103. This flow condenses at least partially in the reboiler 24 before being returned to the low pressure column 103
- a flow of residual nitrogen 72 is withdrawn at the top of the low pressure column 103, sent to the subcooler 83 and then to the exchanger 100 where it heats up.
- a flow rate of 203 Nm 3 / h of oxygen at 99.5 mol%. is withdrawn in liquid form from the low pressure column 103, pumped into the pump 19 to 40 bara and vaporizes in the exchanger 100 to form a gas flow under pressure.
- a flow rate of 200 Nm 3 / h of nitrogen gas is withdrawn at the top of the high pressure column 101 and is partially heated in the exchanger 100. At an intermediate temperature, part of the gas is expanded in a turbine 35 before mixed with the waste gas 72. The rest of the nitrogen continues its heating and is a product of the apparatus.
- FIG. 4 The installation of Figure 4 includes a high pressure column 101 operating at 14.3 bara, an intermediate pressure column 102 operating at 8.5 bara and a low pressure column 103 operating at 4.8 bara. All the nitrogen gas in the head of the high pressure column is used to heat the bottom column reboiler pressure but other means of heating can be envisaged, such as double reboiler systems, one heated by air.
- a flow rate of 1000 Nm 3 / h of air 1 to about 14.3 bara is divided in two to form a first flow 17 and a second flow 3 which is supercharged in a booster 5 at a higher pressure of the order of 75 bara.
- Both flow rates 3.17 cool through crossing a heat exchanger 100.
- flow 17 is sent to the tank of the high pressure column 101 and the liquid flow 3 is expanded in a turbine producing a flow at least partially liquid at its outlet, the fluid or mixture of fluids leaving the turbine being sent at least part of the high pressure column 101.
- a flow of rich liquid 10 from the high pressure column 101 cools in the subcooler 83 before being relaxed and sent to an intermediate level of the intermediate pressure column 102 between two sections, for example of structured packings of corrugated-cross type.
- the liquid can be sent to another level of the column and the column can also receive a gaseous air flow or liquid.
- This liquid is separated into a second oxygen-enriched liquid 20 and a nitrogen-enriched liquid 25.
- the liquid 25 cools in the subcooler 83, before to be relaxed and sent to the top of the low pressure column 103, after being mixed with a poor liquid flow 15 from the top of the high pressure column 101 which was also cooled in the subcooler 83 and relaxed in a valve.
- the bottom liquid of the intermediate pressure column is divided into two. Part is relaxed and sent to the low pressure column directly while the rest is relaxed in a valve, sent to the head condenser 22 of the intermediate pressure column where it vaporizes at least partially before to be sent to the low pressure column 103.
- a liquid air flow 12 is withdrawn from the high pressure column, cooled in the subcooler 83, expanded and sent to the low pressure column.
- the reboiler 24 of the intermediate pressure column 102 is heated by means of an argon-enriched gas flow 233 containing about 5 to 15% mol., preferably 8 to 10 mol%. argon from the low pressure column 103. This flow is condensed at least partially in the reboiler 24 before being returned to the low pressure column 103.
- a flow of residual nitrogen 72 is withdrawn at the top of the low pressure column 103, sent to the subcooler 83 and then to the exchanger 100 where it heats up.
- a flow 31 of 177 Nm 3 / h of oxygen at 99.5 mol%. is withdrawn in liquid form from the low pressure column, pumped into the pump 19 to 40 bara and vaporizes in the exchanger 100 to form a gas flow under pressure.
- the apparatus may receive all or a portion of its supply air from a compressor of a gas turbine, the residual nitrogen of the apparatus being returned to the gas turbine.
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Description
- le fluide enrichi en oxygène soutiré de la colonne basse pression contient au moins 95 % mol. d'oxygène, éventuellement au moins 98 % mol. d'oxygène.
- aucun débit gazeux enrichi en azote n'est soutiré en tête de la colonne haute pression ou un débit gazeux enrichi en azote est soutiré en tête de la colonne haute pression.
- la colonne basse pression opère à au moins 1,3 bara, éventuellement au moins 2 bara, de préférence au moins 4 bara.
- on envoie un (des) débit(s) d'air gazeux et/ou liquide à la colonne à pression intermédiaire et/ou à la colonne basse pression et/ou à la colonne haute pression.
- le gaz provenant de la partie inférieure de la colonne basse pression envoyé au rebouilleur de cuve contient entre 1 et 20 % mol. d'argon, de préférence entre 5 et 15% mol . d'argon, encore plus préférablement entre 8 et 10 % mol. d'argon.
- au moins une partie du deuxième débit enrichi en azote se condense, éventuellement dans un condenseur de tête de la colonne à pression intermédiaire.
- une turbine de détente et des moyens pour amener un débit de la colonne basse pression à cette turbine sans le comprimer.
- des moyens pour amener un débit d'air à la colonne à pression intermédiaire et/ou basse pression et/ou haute pression.
Procédé de la Figure 1 | Procédé de la Figure 3 (invention) | |
Pression de la colonne haute pression | 5 bara | 5 bara |
Pression de la colonne basse pression | 1.3 bara | 1.3 bara |
Pression de la colonne à pression intermédiaire | 2.7 bara | |
Débit total d'air traité | 1000 Nm3/h | 1000 Nm3/h |
Teneur en oxygène du produit gazeux | 99.5% 02 | 99.5% 02 |
Production d'oxygène, compté pur | 193 Nm3/h | 203 Nm3/h |
Production d'azote gazeux haute pression | 200 Nm3/h | 200 Nm3/h |
Rendement d'extraction d'oxygène | 92% | 97% |
Energie de séparation | Base : 100 | 95 |
Procédé de la Figure 2 | Procédé de la Figure 4 (invention) | |
Pression de la colonne haute pression | 14.3 bara | 14.3 bara |
Pression de la colonne basse pression | 4.8 bara | 4.8 bara |
Pression de la colonne à pression intermédiaire | 8.5 bara | |
Débit d'air total | 1000 Nm3/h | 1000 Nm3/h |
Teneur en oxygène du produit gazeux | 99.5% 02 | 99.5% 02 |
Production d'oxygène, compté pur | 164 Nm3/h | 177 Nm3/h |
Production d'azote gazeux haute pression | 0 Nm3/h | 0 Nm3/h |
Rendement d'extraction d'oxygène | 78% | 85% |
Energie de séparation | Base : 100 | 90 |
Claims (13)
- Procédé de séparation d'air dans un appareil de séparation comprenant une colonne haute pression (101), une colonne à pression intermédiaire (102) ayant un rebouilleur de cuve (24) et une colonne basse pression (103) dans lequela) on envoie au moins un mélange (1) au moins d'oxygène, d'azote et d'argon au moins à la colonne haute pression où il se sépare en un premier débit enrichi en oxygène et un premier débit enrichi en azoteb) on envoie au moins une partie du premier débit (10) enrichi en oxygène à la colonne opérant à pression intermédiaire où il se sépare en un deuxième débit enrichi en oxygène (20) et un deuxième débit enrichi en azote (25)c) on envoie au moins une partie du deuxième débit enrichi en oxygène et/ou du deuxième débit enrichi en azote à la colonne basse pressiond) on envoie un gaz (233) de la partie inférieure de la colonne basse pression au rebouilleur de cuve de la colonne à pression intermédiaire où il se condense au moins partiellement avant d'être renvoyé à la colonne basse pressione) on soutire au moins un fluide enrichi en oxygène (31) et au moins un fluide (72) enrichi en azote de la colonne basse pression etf) on condense au moins partiellement au moins une partie du premier fluide enrichi en azote dans un vaporiseur-condenseur associé à la colonne basse pression et on renvoie au moins une partie du fluide au moins partiellement condensé à la colonne haute pression
- Procédé selon la revendication 1 dans lequel le fluide (31) enrichi en oxygène soutiré de la colonne basse pression contient au moins 95 % mol. d'oxygène, éventuellement au moins 98 % mol. d'oxygène.
- Procédé selon la revendication 1 ou 2 dans lequel aucun débit gazeux enrichi en azote n'est soutiré en tête de la colonne haute pression (101).
- Procédé selon la revendication 1 ou 2 dans lequel un débit gazeux (33) enrichi en azote est soutiré en tête de la colonne haute pression (101).
- Procédé selon la revendication 1,2,3 ou 4 dans lequel la colonne basse pression (103) opère à au moins 1,3 bara, éventuellement au moins 2 bara, de préférence au moins 4 bara.
- Procédé selon une des revendications précédentes dans lequel on envoie un (des) débit(s) d'air gazeux et/ou liquide à la colonne à pression intermédiaire et/ou à la colonne basse pression et/ou à la colonne haute pression.
- Procédé selon une des revendications précédentes dans lequel le gaz (233) provenant de la partie inférieure de la colonne basse pression envoyé au rebouilleur de cuve contient entre 1 et 20 % mol. d'argon.
- Procédé selon une des revendications précédentes dans lequel au moins une partie du deuxième débit enrichi en azote se condense, éventuellement dans un condenseur de tête (29) de la colonne à pression intermédiaire.
- Installation de séparation d'air par distillation cryogénique comprenant une colonne haute pression (101), une colonne à pression intermédiaire (102) ayant un rebouilleur de cuve (24) et une colonne basse pression (103), la colonne haute pression et la colonne basse pression étant reliées thermiquement entre elles, des moyens pour envoyer un mélange (1) au moins d'oxygène, d'azote et d'argon au moins à la colonne haute pression, des moyens pour envoyer un débit enrichi en oxygène (10) de la colonne haute pression à la colonne à pression intermédiaire, des moyens pour envoyer un fluide enrichi en oxygène (20) et/ou un fluide enrichi en azote (25) de la colonne à pression intermédiaire à la colonne basse pression, des moyens pour envoyer un fluide (233) de la colonne basse pression au rebouilleur de cuve de la colonne à pression intermédiaire, des moyens pour soutirer un fluide enrichi en azote (72) et un fluide enrichi en oxygène (31) de la colonne basse pression
caractérisée en ce qu'elle ne comprend pas de moyens d'enrichissement en argon d'un fluide contenant entre 3 et 20 % mol. d'argon autre que les colonnes haute pression, basse pression et pression intermédiaire. - Installation selon la revendication 9 comprenant une turbine de détente et des moyens pour amener un débit de la colonne basse pression à cette turbine sans le comprimer.
- Installation selon la revendication 9 ou 10 comprenant des moyens pour amener un débit d'air à la colonne à pression intermédiaire et/ou basse pression et/ou haute pression (101,102,103).
- Installation selon l'une des revendications 9 à 11 dans laquelle le fluide (233) envoyé au rebouilleur est soutiré de la colonne basse pression à un niveau inférieur au niveau de l'introduction d'un fluide enrichi en oxygène provenant de la colonne à pression intermédiaire.
- Installation selon l'une des revendications 9 à 12 dans laquelle la colonne à pression intermédiaire (102) a un condenseur de tête (29).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0011932 | 2000-09-19 | ||
FR0011932A FR2814229B1 (fr) | 2000-09-19 | 2000-09-19 | Procede et installation de separation d'air par distillation cryogenique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1189003A1 EP1189003A1 (fr) | 2002-03-20 |
EP1189003B1 true EP1189003B1 (fr) | 2005-01-26 |
Family
ID=8854455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01402310A Expired - Lifetime EP1189003B1 (fr) | 2000-09-19 | 2001-09-06 | Procédé et installation de séparation d'air par distillation cryogénique |
Country Status (7)
Country | Link |
---|---|
US (1) | US6536232B2 (fr) |
EP (1) | EP1189003B1 (fr) |
AT (1) | ATE288064T1 (fr) |
CA (1) | CA2357302A1 (fr) |
DE (1) | DE60108579T2 (fr) |
FR (1) | FR2814229B1 (fr) |
ZA (1) | ZA200107210B (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60127145T3 (de) * | 2001-12-04 | 2010-04-15 | Air Products And Chemicals, Inc. | Verfahren und Vorrichtung zur kryogenischen Luftzerlegung |
FR2875588B1 (fr) * | 2004-09-21 | 2007-04-27 | Air Liquide | Procede de separation d'air par distillation cryogenique |
DE102004047961A1 (de) * | 2004-10-01 | 2006-05-18 | Siemens Ag | Vorrichtung und Verfahren zum Ansteuern eines Piezoaktors |
EP2597409B1 (fr) * | 2011-11-24 | 2015-01-14 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Procédé et installation pour la séparation de l'air par distillation cryogénique |
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 |
FR3017698B1 (fr) * | 2014-02-14 | 2019-03-29 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Colonne de separation d'air par distillation cryogenique, appareil de separation d'air comportant une telle colonne et procede de fabrication d'une telle colonne |
EP3620739A1 (fr) | 2018-09-05 | 2020-03-11 | Linde Aktiengesellschaft | Procédé de décomposition à basse température de l'air et installation de décomposition de l'air |
US12209802B2 (en) | 2022-07-28 | 2025-01-28 | Praxair Technology, Inc. | System and method for cryogenic air separation using four distillation columns including an intermediate pressure column |
US20240035741A1 (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 |
US12055345B2 (en) | 2022-07-28 | 2024-08-06 | Praxair Technology, Inc. | Air separation unit and method for production of nitrogen and argon using a distillation column system with an intermediate pressure kettle column |
US11959701B2 (en) | 2022-07-28 | 2024-04-16 | Praxair Technology, Inc. | Air separation unit and method for production of high purity nitrogen product using a distillation column system with an intermediate pressure kettle column |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4605427A (en) * | 1983-03-31 | 1986-08-12 | Erickson Donald C | Cryogenic triple-pressure air separation with LP-to-MP latent-heat-exchange |
US5341646A (en) * | 1993-07-15 | 1994-08-30 | Air Products And Chemicals, Inc. | Triple column distillation system for oxygen and pressurized nitrogen production |
GB9412182D0 (en) * | 1994-06-17 | 1994-08-10 | Boc Group Plc | Air separation |
US5682764A (en) * | 1996-10-25 | 1997-11-04 | Air Products And Chemicals, Inc. | Three column cryogenic cycle for the production of impure oxygen and pure nitrogen |
GB9726954D0 (en) * | 1997-12-19 | 1998-02-18 | Wickham Michael | Air separation |
US5881570A (en) * | 1998-04-06 | 1999-03-16 | Praxair Technology, Inc. | Cryogenic rectification apparatus for producing high purity oxygen or low purity oxygen |
US6196024B1 (en) * | 1999-05-25 | 2001-03-06 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic distillation system for air separation |
US6347534B1 (en) * | 1999-05-25 | 2002-02-19 | Air Liquide Process And Construction | Cryogenic distillation system for air separation |
US6318120B1 (en) * | 2000-08-11 | 2001-11-20 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic distillation system for air separation |
-
2000
- 2000-09-19 FR FR0011932A patent/FR2814229B1/fr not_active Expired - Fee Related
-
2001
- 2001-08-30 ZA ZA200107210A patent/ZA200107210B/xx unknown
- 2001-09-06 AT AT01402310T patent/ATE288064T1/de not_active IP Right Cessation
- 2001-09-06 EP EP01402310A patent/EP1189003B1/fr not_active Expired - Lifetime
- 2001-09-06 DE DE60108579T patent/DE60108579T2/de not_active Expired - Fee Related
- 2001-09-13 CA CA002357302A patent/CA2357302A1/fr not_active Abandoned
- 2001-09-19 US US09/955,261 patent/US6536232B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1189003A1 (fr) | 2002-03-20 |
DE60108579D1 (de) | 2005-03-03 |
FR2814229B1 (fr) | 2002-10-25 |
ATE288064T1 (de) | 2005-02-15 |
US6536232B2 (en) | 2003-03-25 |
US20020053219A1 (en) | 2002-05-09 |
FR2814229A1 (fr) | 2002-03-22 |
DE60108579T2 (de) | 2005-12-22 |
ZA200107210B (en) | 2002-03-04 |
CA2357302A1 (fr) | 2002-03-19 |
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