EP1098152A1 - Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft - Google Patents

Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft Download PDF

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Publication number
EP1098152A1
EP1098152A1 EP00403001A EP00403001A EP1098152A1 EP 1098152 A1 EP1098152 A1 EP 1098152A1 EP 00403001 A EP00403001 A EP 00403001A EP 00403001 A EP00403001 A EP 00403001A EP 1098152 A1 EP1098152 A1 EP 1098152A1
Authority
EP
European Patent Office
Prior art keywords
liquid
exchanger
phase separator
air
sent
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Withdrawn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
EP00403001A
Other languages
English (en)
French (fr)
Inventor
Jean-Yves Lehman
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 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 pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1098152A1 publication Critical patent/EP1098152A1/de
Withdrawn legal-status Critical Current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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
    • 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
    • F25J3/04248—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
    • F25J3/04406—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
    • 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
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04854—Safety aspects of operation
    • F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
    • 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
    • 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

Definitions

  • the present invention relates to an air separation process and apparatus by cryogenic distillation.
  • it relates to a method and apparatus for air separation by cryogenic distillation in which a liquid flow, in particular a liquid comprising at least 85 mol% of oxygen, coming from a column of cryogenic distillation is pressurized and vaporized by heat exchange with a flow air to be distilled.
  • US-A-5,901,578 describes a method of air separation in which a flow liquid oxygen is pumped, sent to a phase separator, sent from the separator phases to a heat exchanger where it partially vaporizes and returned to the phase separator. A gas flow from the phase separator is heated in the exchanger and serves as a product. Liquid oxygen flow is taken as product between the pump and the phase separator.
  • EP-A-0464630 describes a method of air separation in which a flow liquid oxygen is pumped, sent to a phase separator, sent from the separator phases to a first heat exchanger where it partially vaporizes and is returned to the phase separator. A gas flow from the phase separator is reheated in a second exchanger and used as a product. Liquid oxygen flow is taken as a product between the phase separator and the first exchanger.
  • the liquid flow coming from the phase separator is mixed with the liquid flow coming from the device and intended for the exchanger downstream of the liquid flow withdrawal.
  • the liquid withdrawn from step vi) is a liquid product.
  • phase separator no longer receives the flow of liquid from of the device but only the partially vaporized flow coming from the exchanger, its size is reduced and its cost will be lower.
  • Air 1 is compressed in a compressor 2, cooled in 4 and purified in the adsorbent beds 6. Then it is divided into three. A flow 8 is sent to the column medium pressure 11 of a double column. Another flow is boosted in the booster 14, cooled in exchanger 9, expanded in the blowing turbine 16 and sent to the low pressure column 12 of the double column.
  • Another air flow is compressed in the booster 19 at a pressure high, cooled in exchanger 9 and sent in liquid form to the middle column pressure and the low pressure column.
  • Liquid flows enriched with oxygen and nitrogen are sent from the medium pressure column to the low pressure column after a sub step cooling (not shown).
  • a liquid flow 33 containing at least 85 mol% of oxygen and preferably between 95 and 99.9 mol% of oxygen is pressurized in pump 34 to a pressure between 1 and 10 bar and sent to the exchanger 9 where it partially vaporizes.
  • the partially vaporized flow 39 is sent to a phase separator 37.
  • a flow gas 40 from the phase separator is sent to the exchanger 9 to heat up at the ambient temperature.
  • a liquid flow from the phase separator is partly sent to the exchanger 9 after mixing with the pressurized liquid flow coming from the pump 34.
  • a other liquid flow 36 is withdrawn either continuously or from time to time upstream of the point where the other two liquid flows mix.
  • This other liquid flow can be a liquid product or simply a devolution to avoid the accumulation of hydrocarbons or nitrogen oxides in the phase separator.
  • the phase separator can be integrated with the heat exchanger.

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)
EP00403001A 1999-11-05 2000-10-27 Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft Withdrawn EP1098152A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913903A FR2800859B1 (fr) 1999-11-05 1999-11-05 Procede et appareil de separation d'air par distillation cryogenique
FR9913903 1999-11-05

Publications (1)

Publication Number Publication Date
EP1098152A1 true EP1098152A1 (de) 2001-05-09

Family

ID=9551772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00403001A Withdrawn EP1098152A1 (de) 1999-11-05 2000-10-27 Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft

Country Status (5)

Country Link
US (1) US6321568B1 (de)
EP (1) EP1098152A1 (de)
JP (1) JP2001194056A (de)
CA (1) CA2324642A1 (de)
FR (1) FR2800859B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112728A2 (en) * 2007-03-13 2008-09-18 Praxair Technology, Inc. Air separation method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6499312B1 (en) * 2001-12-04 2002-12-31 Praxair Technology, Inc. Cryogenic rectification system for producing high purity nitrogen
JP4515225B2 (ja) * 2004-11-08 2010-07-28 大陽日酸株式会社 窒素製造方法及び装置
US20080245102A1 (en) * 2005-11-17 2008-10-09 Frederic Judas Process and Apparatus for the Separation of Air by Cryogenic Distillation
US8020408B2 (en) * 2006-12-06 2011-09-20 Praxair Technology, Inc. Separation method and apparatus
US9222725B2 (en) * 2007-06-15 2015-12-29 Praxair Technology, Inc. Air separation method and apparatus
JP4841591B2 (ja) * 2008-06-23 2011-12-21 大陽日酸株式会社 窒素製造方法及び装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754406A (en) * 1970-03-16 1973-08-28 Air Prod & Chem The production of oxygen
EP0464630A1 (de) * 1990-06-27 1992-01-08 Praxair Technology, Inc. Tieftemperatur-Lufttrennung mit Nebenverdampfer für beide Produkte
US5456083A (en) * 1994-05-26 1995-10-10 The Boc Group, Inc. Air separation apparatus and method
US5901578A (en) * 1998-05-18 1999-05-11 Praxair Technology, Inc. Cryogenic rectification system with integral product boiler
DE10009542A1 (de) * 1999-03-17 2000-09-21 Linde Ag Vorrichtung und Verfahren zur Zerlegung eines Gasgemischs bei niedriger Temperatur
DE10013073A1 (de) * 2000-03-17 2000-10-19 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739439B1 (fr) * 1995-09-29 1997-11-14 Air Liquide Procede et installation de production d'un gaz sous pression par distillation cryogenique
US5946942A (en) * 1998-08-05 1999-09-07 Praxair Technology, Inc. Annular column for cryogenic rectification

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754406A (en) * 1970-03-16 1973-08-28 Air Prod & Chem The production of oxygen
EP0464630A1 (de) * 1990-06-27 1992-01-08 Praxair Technology, Inc. Tieftemperatur-Lufttrennung mit Nebenverdampfer für beide Produkte
US5456083A (en) * 1994-05-26 1995-10-10 The Boc Group, Inc. Air separation apparatus and method
US5901578A (en) * 1998-05-18 1999-05-11 Praxair Technology, Inc. Cryogenic rectification system with integral product boiler
DE10009542A1 (de) * 1999-03-17 2000-09-21 Linde Ag Vorrichtung und Verfahren zur Zerlegung eines Gasgemischs bei niedriger Temperatur
DE10013073A1 (de) * 2000-03-17 2000-10-19 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112728A2 (en) * 2007-03-13 2008-09-18 Praxair Technology, Inc. Air separation method
WO2008112728A3 (en) * 2007-03-13 2008-12-11 Praxair Technology Inc Air separation method

Also Published As

Publication number Publication date
FR2800859A1 (fr) 2001-05-11
US6321568B1 (en) 2001-11-27
FR2800859B1 (fr) 2001-12-28
CA2324642A1 (en) 2001-05-25
JP2001194056A (ja) 2001-07-17

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