EP1690053A1 - Verfahren und vorrichtung zum trennen von luft durch kryogene destillation - Google Patents

Verfahren und vorrichtung zum trennen von luft durch kryogene destillation

Info

Publication number
EP1690053A1
EP1690053A1 EP04805780A EP04805780A EP1690053A1 EP 1690053 A1 EP1690053 A1 EP 1690053A1 EP 04805780 A EP04805780 A EP 04805780A EP 04805780 A EP04805780 A EP 04805780A EP 1690053 A1 EP1690053 A1 EP 1690053A1
Authority
EP
European Patent Office
Prior art keywords
air
pressure column
column
low pressure
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.)
Withdrawn
Application number
EP04805780A
Other languages
English (en)
French (fr)
Inventor
Hervé Le Bihan
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA a Directoire et Conseil de Surveillance 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 a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1690053A1 publication Critical patent/EP1690053A1/de
Withdrawn legal-status Critical Current

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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of 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
    • 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
    • F25J3/0429—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 feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or 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
    • F25J3/0446—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 the heat generated by mixing two different phases
    • F25J3/04466—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 the heat generated by mixing two different phases for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid 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
    • F25J3/04763—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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • 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
    • F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/12—Particular process parameters like pressure, temperature, ratios

Definitions

  • the present invention relates to a method and an apparatus for separating air by cryogenic distillation.
  • it relates to an air separation process using a mixing column for the production of impure gaseous oxygen.
  • It is known from EP-A-0538118 to use a double column and a mixing column to produce impure oxygen with a dedicated air su ⁇ ressor to compress the air to the pressure of the mixing column.
  • the present invention aims to reduce the investment costs of such an apparatus.
  • an air separation process is provided by cryogenic distillation in an installation comprising a medium pressure column, a low pressure column and a mixing column in which i) air is compressed in a compressor, it is cooled in an exchange line and a first part of the air is sent to the tank of the mixing column ii) a second part of the air is sent to the medium pressure column where it separates iii) an oxygen-enriched liquid and a nitrogen-enriched liquid are sent from the medium pressure column to the low pressure column iv) an oxygen-rich liquid is sent from the low pressure column to the head of the mixing column v) on draw at least one liquid flow from the medium or low pressure column vi) press the second part of the air in a su ⁇ ressor, cool it in the exchange line, divide it into a first fraction and a second fr action vii) the first fraction of the air in the exchange line is cooled, at least partially liquefied and sent to the medium pressure column and / or the low pressure column viii) the second fraction is expanded the
  • the liquid withdrawn from the medium or low pressure column is a final product
  • the booster is coupled to the Claude turbine.
  • the booster is a cold booster.
  • the mixing column operates at between 8 and 20 bar abs.
  • all the air intended for distillation is compressed to between 8 and 20 bar abs.
  • - between 40 and 90% of the air intended for distillation is overpressed.
  • the su l'airressed air is su ⁇ ressed at between 12 and 30 bar abs.
  • an air separation installation is provided by cryogenic distillation in an apparatus comprising a medium pressure column, a low pressure column and a mixing column, a Claude turbine, a booster, means for compressing air, means for sending part of the compressed air from the air to the mixing column, means for sending another part of the compressed air to the su ⁇ ressor, means for sending a fraction of the compressed air at the Claude turbine and to send the expanded air to the medium pressure column, means for sending the rest of the compressed air to the medium pressure and / or low pressure column after liquefaction and expansion and means for withdrawing from the minus a liquid from the medium pressure column and / or from the low pressure column as final product.
  • the booster can be coupled to the Claude turbine.
  • FIG. 1 schematically shows an embodiment of the air distillation installation according to the invention.
  • the air distillation installation shown in FIG. 1 is intended to produce impure oxygen Ol, for example having a purity of 80 to 97% and preferably 85 to 95% under a determined pressure P clearly different from 6 x 10 5 Pa abs., For example under 8 to 20 x 10 5 Pa.
  • the installation essentially comprises a heat exchange line 1, a double distillation column itself comprising a medium pressure column 3, a low column pressure 4 and a main condenser-vaporizer 5, and a column of mixing 6.
  • the mixing column 6 and the low pressure column 4 are integrated into a single structure.
  • the medium pressure column 3 forms a separate structure and is surmounted by the condenser-vaporizer 5, as described in EP-A-1978212.
  • Columns 3 and 4 typically operate at approximately 6 x 10 5 Pa and approximately 1 x 10 5 Pa respectively.
  • a mixing column is a column which has the same structure as a distillation column but which is used to mix in a manner close to reversibility a relatively volatile gas, introduced at its base, and a less volatile liquid, introduced at its top.
  • Such a mixture produces refrigerating energy and therefore makes it possible to reduce the energy consumption linked to distillation.
  • this mixture is used, moreover, to directly produce impure oxygen under the pressure P, as will be described below.
  • the air to be separated by distillation is compressed to 15 x 10 5 Pa (generally between
  • Liquid 26 is withdrawn from the condenser 5, carried by a pump 13 at a pressure P1, slightly higher than the above-mentioned pressure P for take into account pressure losses (P1-P less than 1 x 10 5 Pa), and partly introduced at the top of column 6. Part 27 of the liquid oxygen can be sent to storage. Auxiliary air from compressor C01, compressed to a pressure well above medium pressure and partially cooled in the exchange line 1, is introduced at the base of the mixing column 6.
  • FIG. 1 also shows auxiliary heat exchangers 19, 20 ensuring the recovery of the cold available in the fluids circulating in the installation.
  • the double column composed of columns 3 and 4 can form a single structure in a conventional manner, the mixing column 6 forming a separate structure.
  • a flow of pressurized liquid oxygen and / or a flow of pressurized liquid nitrogen can vaporize in the exchange line 1 or in a dedicated vaporizer.

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)
EP04805780A 2003-11-04 2004-10-26 Verfahren und vorrichtung zum trennen von luft durch kryogene destillation Withdrawn EP1690053A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0350779A FR2861841B1 (fr) 2003-11-04 2003-11-04 Procede et appareil de separation d'air par distillation cryogenique
PCT/FR2004/050537 WO2005045339A1 (fr) 2003-11-04 2004-10-26 Procédé et appareil de séparation d'air par distillation cryogénique

Publications (1)

Publication Number Publication Date
EP1690053A1 true EP1690053A1 (de) 2006-08-16

Family

ID=34430075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04805780A Withdrawn EP1690053A1 (de) 2003-11-04 2004-10-26 Verfahren und vorrichtung zum trennen von luft durch kryogene destillation

Country Status (6)

Country Link
US (1) US20070137248A1 (de)
EP (1) EP1690053A1 (de)
JP (1) JP2007510879A (de)
CN (1) CN100538233C (de)
FR (1) FR2861841B1 (de)
WO (1) WO2005045339A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102809261B (zh) * 2012-04-19 2014-07-23 四川空分设备(集团)有限责任公司 从空气中制取低纯度氧气的深冷法分离方法及其装置
FR3013105B1 (fr) * 2013-11-14 2016-01-01 Air Liquide Procede et appareil de separation d’air par distillation cryogenique
EP3438585A3 (de) 2017-08-03 2019-04-17 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Enteisungsverfahren eines geräts zur trennung von luft durch kryogene destillation, und entsprechend angepasstes gerät, um mit diesem verfahren enteist zu werden

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
JP2909678B2 (ja) * 1991-03-11 1999-06-23 レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード 圧力下のガス状酸素の製造方法及び製造装置
FR2680114B1 (fr) * 1991-08-07 1994-08-05 Lair Liquide Procede et installation de distillation d'air, et application a l'alimentation en gaz d'une acierie.
DE69419675T2 (de) * 1993-04-30 2000-04-06 The Boc Group Plc Lufttrennung
US5471843A (en) * 1993-06-18 1995-12-05 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the production of oxygen and/or nitrogen under pressure at variable flow rate
US5475980A (en) * 1993-12-30 1995-12-19 L'air Liquide, Societe Anonyme Pour L'etude L'exploitation Des Procedes Georges Claude Process and installation for production of high pressure gaseous fluid
US5454227A (en) * 1994-08-17 1995-10-03 The Boc Group, Inc. Air separation method and apparatus
US5490391A (en) * 1994-08-25 1996-02-13 The Boc Group, Inc. Method and apparatus for producing oxygen
US5778700A (en) * 1997-04-30 1998-07-14 The Boc Group, Inc. Method of producing gaseous oxygen at variable rate
US5802873A (en) * 1997-05-08 1998-09-08 Praxair Technology, Inc. Cryogenic rectification system with dual feed air turboexpansion
US5881570A (en) * 1998-04-06 1999-03-16 Praxair Technology, Inc. Cryogenic rectification apparatus for producing high purity oxygen or low purity oxygen
FR2778234B1 (fr) * 1998-04-30 2000-06-02 Air Liquide Installation de distillation d'air et boite froide correspondante
FR2782787B1 (fr) * 1998-08-28 2000-09-29 Air Liquide Procede et installation de production d'oxygene impur par distillation d'air
FR2789162B1 (fr) * 1999-02-01 2001-11-09 Air Liquide Procede de separation d'air par distillation cryogenique
DE19951521A1 (de) * 1999-10-26 2001-05-03 Linde Ag Verfahren und Vorrichtung zur Gewinnung eines Druckprodukts durch Tieftemperaturzerlegung von Luft
DE10139727A1 (de) * 2001-08-13 2003-02-27 Linde Ag Verfahren und Vorrichtung zur Gewinnung eines Druckprodukts durch Tieftemperaturzerlegung von Luft
FR2831249A1 (fr) * 2002-01-21 2003-04-25 Air Liquide Procede et installation de separation d'air par distillation cryogenique
DE10228111A1 (de) * 2002-06-24 2004-01-15 Linde Ag Luftzerlegungsverfahren und -anlage mit Mischsäule und Krypton-Xenon-Gewinnung

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See references of WO2005045339A1 *

Also Published As

Publication number Publication date
FR2861841B1 (fr) 2006-06-30
JP2007510879A (ja) 2007-04-26
WO2005045339A1 (fr) 2005-05-19
CN1871485A (zh) 2006-11-29
FR2861841A1 (fr) 2005-05-06
US20070137248A1 (en) 2007-06-21
CN100538233C (zh) 2009-09-09

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