EP2279385A2 - Appareil et procédé de séparation d'air par distillation cryogénique - Google Patents
Appareil et procédé de séparation d'air par distillation cryogéniqueInfo
- Publication number
- EP2279385A2 EP2279385A2 EP09742279A EP09742279A EP2279385A2 EP 2279385 A2 EP2279385 A2 EP 2279385A2 EP 09742279 A EP09742279 A EP 09742279A EP 09742279 A EP09742279 A EP 09742279A EP 2279385 A2 EP2279385 A2 EP 2279385A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure column
- level
- liquid
- oxygen
- low 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
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
- F25J3/04642—Recovering noble gases from air
- F25J3/04745—Krypton and/or Xenon
-
- 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
-
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
- F25J2200/94—Details relating to the withdrawal point
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/02—Mixing or blending of fluids to yield a certain product
-
- 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/40—One fluid being air
-
- 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/52—One fluid being oxygen enriched compared to air, e.g. "crude oxygen"
Definitions
- the present invention applies to an apparatus and a method for producing krypton and xenon by air separation by cryogenic distillation and in particular to a method of separating gases from the air with internal compression (in which oxygen gaseous is produced by vaporization under pressure in the exchange line) where a krypton / xenon mixture is extracted.
- the heat source used to vaporize the lower rich liquid is preferably a fluid from the column from which the said lower rich liquid comes from, a fluid coming from an upper distillation stage which, by yielding its heat, condenses in the vaporizer / condenser.
- the liquid thus produced feeds the low pressure column to a suitable distillation stage.
- the lower rich liquid produces, for its part, a vaporized phase which feeds the low pressure column to a suitable distillation stage, and a purge where preferably almost 100% of the xenon contained in the diet is extracted, however only about 50% of the krypton is present
- the low pressure column is fed by the purge rich in krypton and xenon produced by concentration.
- the krypton and xenon-rich purge produced above will supply the low pressure column with a distillation stage lower than the withdrawal of the liquid oxygen to be pumped and then vaporized in the main exchanger.
- the final mixture rich in krypton and xenon is extracted from the bottom of the low pressure column for further processing.
- this return is injected at the suction of the pump to minimize the withdrawal OL of the column, and thus increase the extraction yield of krypton and xenon
- a process for producing krypton and xenon by air separation by cryogenic distillation in a double column comprising a medium pressure column and a low pressure column in which: gaseous air compressed, cooled and purified at a first level of the medium pressure column ii) compressed, cooled and purified liquid air is sent to a second level of the medium pressure column above the first level iii) withdrawn a liquid enriched with oxygen, krypton and xenon of the medium pressure column vessel iv) is withdrawn a liquid from the medium pressure column at a level between the first and second levels and is sent to the low pressure column v partially vaporizes the oxygen-enriched liquid, krypton and xenon to form an intermediate gas and an intermediate liquid vi) a first oxygen-rich liquid flow is withdrawn at a third level of the low-pressure column vii) the intermediate liquid of the vaporizer is sent to the low-pressure column at an intermediate level of the lower-pressure column below the third level
- the intermediate gas of the vaporizer is sent to the low pressure column at a level higher than the intermediate level;
- the liquid enriched with oxygen, krypton and xenon is vaporized by heat exchange with a gas withdrawn from the medium-pressure column; the gas withdrawn from the medium pressure column is withdrawn above the first level;
- the intermediate liquid is sent from the vaporizer to an intermediate level of the low pressure column below the third level;
- the second oxygen-rich liquid flow (11) is withdrawn from the low pressure column at a fourth level below the intermediate level;
- the intermediate liquid is mixed with a second oxygen-rich liquid flow.
- an apparatus for producing krypton and xenon by air separation by cryogenic distillation comprising a double column constituted by a medium pressure column and a low pressure column and a vaporizer comprising: means for supplying gaseous air compressed, cooled and purified at a first level of the medium pressure column; ii) means for sending compressed, cooled and purified liquid air to a second level of the medium pressure column; above the first level iii) means for withdrawing an oxygen-enriched, krypton and xenon-enriched liquid from the medium pressure column vessel iv) means for withdrawing a liquid from the medium pressure column at a level between the first and second levels and is sent to the low pressure column; v) means for sending at least a portion of the oxygen-enriched liquid, in krypton and xenon to the vaporizer where it partially vaporizes to form an intermediate gas and an intermediate liquid vi) means for withdrawing a first oxygen-rich liquid flow at a third level of the
- a medium pressure air flow 1 is sent to the medium pressure column 20 of a double air separation column.
- the double column also comprises a low pressure column 21 thermally coupled with the medium pressure column 20 by means of a vaporizer 24, which vaporizes the bottom liquid of the low pressure column by heat exchange with the nitrogen gas at the top of the middle column pressure.
- a flow of high pressure liquid air is expanded in a valve and then divided into two.
- the flow 3 thus formed is sent to the medium pressure column 20 a few theoretical trays above the entry point of the flow 1.
- the rest of the liquid air 4 is cooled in the subcooler 26, expanded and sent to the column low pressure 21.
- a lower rich liquid flow rate enriched in oxygen, krypton and xenon is withdrawn in the vat of the medium pressure column 20, cooled in the subcooler 26, then expanded and sent to a vaporizer 22 where it is partially vaporized by exchange of heat with gaseous air enriched with nitrogen 8 from the medium pressure column 20.
- the gaseous air is condensed to form a flow 9 which is then sent to the low pressure column 21.
- the vaporized rich liquid 16 is expanded as intermediate gas and sent to the low pressure column while the remaining intermediate liquid 7 is sent to the low pressure column 21 a few trays above the tank.
- An upper rich liquid flow 6 is withdrawn between the inlet of the air 1 and the air inlet 3 and / or the withdrawal of the flow 8.
- This flow 6 is cooled in the subcooler 26, mixed with the rich liquid vaporized 16 and sent to the low pressure column 21. Poor liquid enriched in nitrogen 15 is withdrawn at the top of the medium pressure column 20 and sent to the top of the low pressure column 21 after cooling and expansion.
- Liquid oxygen 10 is withdrawn from the low pressure column 21 a few trays above the tank and preferably above the arrival of the liquid 7. This liquid is pumped by the pump 23 to serve as a product rich in water. oxygen. Liquid oxygen 11 enriched in krypton and xenon is withdrawn in the bottom of the low pressure column 21 and can be further purified to produce a mixture of krypton and xenon. Intermediate liquid 7 can be mixed directly with this flow of liquid oxygen instead of being sent to the low pressure column 21.
- Low pressure nitrogen 13 is withdrawn at the top of the low pressure column 21, heated in the subcooler and heated against the air flows 1, 2 (heating not shown).
- Fluids 1 Medium pressure gaseous air, 2 High pressure liquid air, 3 Relaxed liquid air supplying the medium pressure column, 4 Relaxed liquid air supplying the low pressure column, 5 Lower rich liquid enriched in krypton xenon, 6 Lower vaporized rich liquid depleted in krypton xenon, 7 purge rich in krypton xenon, 8 poor air extracted from the medium pressure column, 9 poor liquid air, 10 liquid oxygen extracted from the low pressure column, 11 liquid oxygen extracted from the low pressure column rich in krypton xenon.
Landscapes
- 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)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0852727A FR2930629B1 (fr) | 2008-04-23 | 2008-04-23 | Appareil et procede de separation d'air par distillation cryogenique |
| PCT/FR2009/050625 WO2009136081A2 (fr) | 2008-04-23 | 2009-04-08 | Appareil et procédé de séparation d'air par distillation cryogénique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2279385A2 true EP2279385A2 (fr) | 2011-02-02 |
| EP2279385B1 EP2279385B1 (fr) | 2012-02-22 |
Family
ID=40042566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09742279A Not-in-force EP2279385B1 (fr) | 2008-04-23 | 2009-04-08 | Appareil et procédé de séparation d'air par distillation cryogénique |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110041552A1 (fr) |
| EP (1) | EP2279385B1 (fr) |
| JP (1) | JP2011519010A (fr) |
| CN (1) | CN102016470A (fr) |
| AT (1) | ATE546701T1 (fr) |
| FR (1) | FR2930629B1 (fr) |
| WO (1) | WO2009136081A2 (fr) |
| ZA (1) | ZA201007374B (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6155515B2 (ja) * | 2014-06-24 | 2017-07-05 | 大陽日酸株式会社 | 空気分離方法、及び空気分離装置 |
| EP2993432A1 (fr) * | 2014-09-02 | 2016-03-09 | Linde Aktiengesellschaft | Procede de decomposition a basse temperature de l'air et installation de decomposition de l'air |
| CN109520207B (zh) * | 2017-09-18 | 2022-04-08 | 乔治洛德方法研究和开发液化空气有限公司 | 用于通过低温蒸馏分离空气的方法和单元 |
| CN108302899A (zh) * | 2018-03-29 | 2018-07-20 | 浙江新锐空分设备有限公司 | 一种利用液化空气提取贫氪氙产品的空分系统及方法 |
| CN113465292B (zh) * | 2021-07-05 | 2023-02-21 | 乔治洛德方法研究和开发液化空气有限公司 | 一种增加空气精馏装置氪/氙产量的方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5956974A (en) * | 1998-01-22 | 1999-09-28 | Air Products And Chemicals, Inc. | Multiple expander process to produce oxygen |
| GB9902101D0 (en) * | 1999-01-29 | 1999-03-24 | Boc Group Plc | Separation of air |
| FR2795496B1 (fr) * | 1999-06-22 | 2001-08-03 | Air Liquide | Appareil et procede de separation d'air par distillation cryogenique |
| FR2807150B1 (fr) * | 2000-04-04 | 2002-10-18 | Air Liquide | Procede et appareil de production d'un fluide enrichi en oxygene par distillation cryogenique |
| FR2844039B1 (fr) * | 2002-09-04 | 2005-04-29 | Air Liquide | Procede et installation de production d'oxygene et de gaz rares par distillation cryogenique d'air |
| US7296437B2 (en) * | 2002-10-08 | 2007-11-20 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for separating air by cryogenic distillation and installation for implementing this process |
| US6662593B1 (en) * | 2002-12-12 | 2003-12-16 | Air Products And Chemicals, Inc. | Process and apparatus for the cryogenic separation of air |
-
2008
- 2008-04-23 FR FR0852727A patent/FR2930629B1/fr not_active Expired - Fee Related
-
2009
- 2009-04-08 EP EP09742279A patent/EP2279385B1/fr not_active Not-in-force
- 2009-04-08 US US12/937,649 patent/US20110041552A1/en not_active Abandoned
- 2009-04-08 AT AT09742279T patent/ATE546701T1/de active
- 2009-04-08 JP JP2011505564A patent/JP2011519010A/ja active Pending
- 2009-04-08 CN CN2009801145787A patent/CN102016470A/zh active Pending
- 2009-04-08 WO PCT/FR2009/050625 patent/WO2009136081A2/fr not_active Ceased
-
2010
- 2010-10-14 ZA ZA2010/07374A patent/ZA201007374B/en unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009136081A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110041552A1 (en) | 2011-02-24 |
| CN102016470A (zh) | 2011-04-13 |
| EP2279385B1 (fr) | 2012-02-22 |
| WO2009136081A3 (fr) | 2010-04-08 |
| ZA201007374B (en) | 2011-06-29 |
| JP2011519010A (ja) | 2011-06-30 |
| ATE546701T1 (de) | 2012-03-15 |
| FR2930629B1 (fr) | 2010-05-07 |
| WO2009136081A2 (fr) | 2009-11-12 |
| FR2930629A1 (fr) | 2009-10-30 |
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