EP0768503A3 - Triple column air separation process - Google Patents

Triple column air separation process Download PDF

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Publication number
EP0768503A3
EP0768503A3 EP96116124A EP96116124A EP0768503A3 EP 0768503 A3 EP0768503 A3 EP 0768503A3 EP 96116124 A EP96116124 A EP 96116124A EP 96116124 A EP96116124 A EP 96116124A EP 0768503 A3 EP0768503 A3 EP 0768503A3
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure column
column
compressed
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96116124A
Other languages
German (de)
French (fr)
Other versions
EP0768503B1 (en
EP0768503A2 (en
Inventor
Jürgen Dipl.-Phys. Voit
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP0768503A2 publication Critical patent/EP0768503A2/en
Publication of EP0768503A3 publication Critical patent/EP0768503A3/en
Application granted granted Critical
Publication of EP0768503B1 publication Critical patent/EP0768503B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25J3/04248—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
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low 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
    • F25J3/04436—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • F25J3/04878—Side by side arrangement of multiple vessels in a main column system, wherein the vessels are normally mounted one upon the other or forming different sections of the same column
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/90—Triple column
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/939—Partial feed stream expansion, air

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

Das Verfahren und die Vorrichtung stellen ein Dreifachsäulensystem dar, das eine Hochdrucksäule (7), eine Mitteldrucksäule (8) und eine Niederdrucksäule (9) aufweist. Einsatzluft (1) wird auf einen ersten Druck verdichtet (2). Ein erster Teil (101, 103, 104) der verdichteten Einsatzluft (3) wird in die Hochdrucksäule (7) eingeleitet, nachdem er auf einen zweiten Druck verdichtet (5, 102) wurde, der mindestens gleich dem Betriebsdruck der Hochdrucksäule (7) ist. Ein zweiter Teil (201, 202) der verdichteten Einsatzluft (3) wird in die Mitteldrucksäule (8) eingespeist. Ein dritter Teil (301, 303, 304) der verdichteten Einsatzluft (3) wird arbeitsleistend entspannt (305) und anschließend in die Niederdrucksäule (9) eingespeist (306). Die Sumpffraktionen (18; 26) aus Hochdrucksäule (7) und Mitteldrucksäule (8) werden mindestens zum Teil in die Niederdrucksäule eingeführt (19, 20; 28, 29). Die stickstoffangereicherten Kopffraktionen (10; 21) aus Hochdrucksäule (7) und Mitteldrucksäule (8) werden kondensiert (11; 22). Dabei gewonnenes Kondensat (13; 24) wird als Rücklauf in die Niederdrucksäule (9) eingespeist (15, 16; 25). Der erste Druck ist dabei niedriger als der Betriebsdruck der Mitteldrucksäule (8). Der zweite Teil der Einsatzluft wird von dem ersten Druck auf einen dritten Druck verdichtet (5), der mindestens gleich dem Betriebsdruck der Mitteldrucksäule (8), aber niedriger als der zweite Druck ist.

Figure 00000001
The method and the device represent a triple column system which has a high pressure column (7), a medium pressure column (8) and a low pressure column (9). Feed air (1) is compressed to a first pressure (2). A first part (101, 103, 104) of the compressed feed air (3) is introduced into the high pressure column (7) after it has been compressed (5, 102) to a second pressure which is at least equal to the operating pressure of the high pressure column (7) . A second part (201, 202) of the compressed feed air (3) is fed into the medium pressure column (8). A third part (301, 303, 304) of the compressed feed air (3) is expanded (305) while performing work and then fed into the low-pressure column (9) (306). The bottom fractions (18; 26) of high-pressure column (7) and medium-pressure column (8) are at least partially introduced into the low-pressure column (19, 20; 28, 29). The nitrogen-enriched top fractions (10; 21) from high pressure column (7) and medium pressure column (8) are condensed (11; 22). The condensate (13; 24) obtained is fed (15, 16; 25) into the low-pressure column (9) as a return. The first pressure is lower than the operating pressure of the medium pressure column (8). The second part of the feed air is compressed from the first pressure to a third pressure (5) which is at least equal to the operating pressure of the medium pressure column (8) but lower than the second pressure.
Figure 00000001
EP96116124A 1995-10-11 1996-10-09 Triple column air separation process Expired - Lifetime EP0768503B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537913A DE19537913A1 (en) 1995-10-11 1995-10-11 Triple column process for the low temperature separation of air
DE19537913 1995-10-11

Publications (3)

Publication Number Publication Date
EP0768503A2 EP0768503A2 (en) 1997-04-16
EP0768503A3 true EP0768503A3 (en) 1998-02-04
EP0768503B1 EP0768503B1 (en) 2001-07-25

Family

ID=7774605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116124A Expired - Lifetime EP0768503B1 (en) 1995-10-11 1996-10-09 Triple column air separation process

Country Status (3)

Country Link
US (1) US5730004A (en)
EP (1) EP0768503B1 (en)
DE (2) DE19537913A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US6205815B1 (en) 1997-04-11 2001-03-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plant for separation of a gas mixture by distillation
FR2774752B1 (en) * 1998-02-06 2000-06-16 Air Liquide AIR DISTILLATION SYSTEM AND CORRESPONDING COLD BOX
FR2774753B1 (en) * 1998-02-06 2000-04-28 Air Liquide AIR DISTILLATION SYSTEM COMPRISING MULTIPLE CRYOGENIC DISTILLATION UNITS OF THE SAME TYPE
DE19933558C5 (en) * 1999-07-16 2010-04-15 Linde Ag Three-column process and apparatus for the cryogenic separation of air
DE10103968A1 (en) * 2001-01-30 2002-08-01 Linde Ag Three-pillar system for the low-temperature separation of air
DE10113790A1 (en) * 2001-03-21 2002-09-26 Linde Ag Three-column system for low-temperature air separation
US6397631B1 (en) 2001-06-12 2002-06-04 Air Products And Chemicals, Inc. Air separation process
PL2235460T3 (en) * 2008-01-28 2018-12-31 Linde Ag Process and device for the cryogenic separation of air
DE102009023900A1 (en) 2009-06-04 2010-12-09 Linde Aktiengesellschaft Method for cryogenic separation of air with distillation column system for nitrogen-oxygen separation, involves producing oxygen-enriched fraction and nitrogen fraction in high pressure column, and supplying nitrogen to low pressure column
FR2946735B1 (en) * 2009-06-12 2012-07-13 Air Liquide APPARATUS AND METHOD FOR AIR SEPARATION BY CRYOGENIC DISTILLATION.
FR2953915B1 (en) * 2009-12-11 2011-12-02 Air Liquide METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
US8978413B2 (en) * 2010-06-09 2015-03-17 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Rare gases recovery process for triple column oxygen plant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903089A1 (en) * 1979-01-26 1980-07-31 Linde Ag METHOD FOR OBTAINING OXYGEN FROM AIR
EP0377117A1 (en) * 1988-12-01 1990-07-11 Linde Aktiengesellschaft Air separation process and apparatus
GB2284880A (en) * 1993-12-15 1995-06-21 Boc Group Plc Air separation using triple column rectification
EP0694745A1 (en) * 1994-07-25 1996-01-31 The BOC Group plc Air separation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854508C2 (en) * 1978-12-16 1981-12-03 Linde Ag, 6200 Wiesbaden Method and device for the low-temperature decomposition of a gas mixture
DE3817244A1 (en) * 1988-05-20 1989-11-23 Linde Ag METHOD FOR DEEP TEMPERATURE DISPOSAL OF AIR
US5069699A (en) * 1990-09-20 1991-12-03 Air Products And Chemicals, Inc. Triple distillation column nitrogen generator with plural reboiler/condensers
US5233838A (en) * 1992-06-01 1993-08-10 Praxair Technology, Inc. Auxiliary column cryogenic rectification system
GB9213776D0 (en) * 1992-06-29 1992-08-12 Boc Group Plc Air separation
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
US5341646A (en) * 1993-07-15 1994-08-30 Air Products And Chemicals, Inc. Triple column distillation system for oxygen and pressurized nitrogen production
US5386692A (en) * 1994-02-08 1995-02-07 Praxair Technology, Inc. Cryogenic rectification system with hybrid product boiler
GB9414938D0 (en) * 1994-07-25 1994-09-14 Boc Group Plc Air separation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903089A1 (en) * 1979-01-26 1980-07-31 Linde Ag METHOD FOR OBTAINING OXYGEN FROM AIR
EP0377117A1 (en) * 1988-12-01 1990-07-11 Linde Aktiengesellschaft Air separation process and apparatus
GB2284880A (en) * 1993-12-15 1995-06-21 Boc Group Plc Air separation using triple column rectification
EP0694745A1 (en) * 1994-07-25 1996-01-31 The BOC Group plc Air separation

Also Published As

Publication number Publication date
DE19537913A1 (en) 1997-04-17
DE59607348D1 (en) 2001-08-30
EP0768503B1 (en) 2001-07-25
EP0768503A2 (en) 1997-04-16
US5730004A (en) 1998-03-24

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