EP0878678A3 - Process and apparatus for the production of nitrogen by cryogenic air separation - Google Patents

Process and apparatus for the production of nitrogen by cryogenic air separation Download PDF

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Publication number
EP0878678A3
EP0878678A3 EP98107748A EP98107748A EP0878678A3 EP 0878678 A3 EP0878678 A3 EP 0878678A3 EP 98107748 A EP98107748 A EP 98107748A EP 98107748 A EP98107748 A EP 98107748A EP 0878678 A3 EP0878678 A3 EP 0878678A3
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EP
European Patent Office
Prior art keywords
pressure column
nitrogen
column
heat exchange
nitrogen gas
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
EP98107748A
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German (de)
French (fr)
Other versions
EP0878678B1 (en
EP0878678A2 (en
Inventor
Dietrich Dipl.-Ing. Rottmann
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Linde GmbH
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Linde GmbH
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Filing date
Publication date
Priority claimed from DE19720453A external-priority patent/DE19720453A1/en
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to EP19980107748 priority Critical patent/EP0878678B1/en
Publication of EP0878678A2 publication Critical patent/EP0878678A2/en
Publication of EP0878678A3 publication Critical patent/EP0878678A3/en
Application granted granted Critical
Publication of EP0878678B1 publication Critical patent/EP0878678B1/en
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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
    • F25J3/04406—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
    • F25J3/04151—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
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
    • F25J3/04212—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product and simultaneously condensing vapor from a column serving as reflux within the or another 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
    • F25J3/04248—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
    • 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
    • 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
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • F25J2200/54—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column in the low pressure column of a double pressure main column system
    • 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
    • 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
    • F25J2235/42—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
    • 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
    • F25J2250/42—One fluid being 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
    • 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
    • F25J2250/50—One fluid being oxygen

Abstract

Bei dem Verfahren und der Vorrichtung wird Stickstoff durch zweistufige Rektifikation von Luft in einer Doppelsäule (4) gewonnen. Die Doppelsäule (4) enthält eine Hochdrucksäule (5) und eine Mitteldrucksäule (6), die untereinander in Wärmeaustauschbeziehung (14) stehen. Einsatzluft wird verdichtet, gereinigt, in einem Hauptwärmetauscher (2) gegen Zerlegungsprodukte (17, 18, 29) abgekühlt und der Rektifikation (4) zugeführt. Mindestens eine Stickstoff-Produktfraktion (21) wird aus der Hochdrucksäule (5) abgeführt. Eine Stickstoffgasfraktion (20) aus der Doppelsäule (4) wird angewärmt (2), entspannt (23) und in indirekten Wärmeaustausch (25) mit einer sauerstoffangereicherten Flüssigkeit (11, 28) aus dem unteren Bereich der Mitteldrucksäule (6) gebracht. Dabei wird die Stickstoffgasfraktion (20) mindestens teilweise kondensiert und die sauerstoffangereicherte Flüssigkeit (11, 28) mindestens teilweise verdampft. Das bei dem indirekten Wärmeaustausch (25) gebildete Kondensat (26) wird mindestens teilweise in die Mitteldrucksäule (6) eingeführt (16). Die Stickstoffgasfraktion (20) wird stromaufwärts der Entspannung (23) auf eine Zwischentemperatur angewärmt, die zwischen den Temperaturen am kalten und warmen Ende des Hauptwärmetauschers (2) liegt.

Figure 00000001
In the method and the device nitrogen is obtained by two-stage rectification of air in a double column (4). The double column (4) contains a high-pressure column (5) and a medium-pressure column (6), which are in heat exchange relationship (14). Feed air is compressed, cleaned, cooled in a main heat exchanger (2) against decomposition products (17, 18, 29) and fed to the rectification (4). At least one nitrogen product fraction (21) is removed from the high pressure column (5). A nitrogen gas fraction (20) from the double column (4) is heated (2), expanded (23) and brought into indirect heat exchange (25) with an oxygen-enriched liquid (11, 28) from the lower area of the medium pressure column (6). The nitrogen gas fraction (20) is at least partially condensed and the oxygen-enriched liquid (11, 28) is at least partially evaporated. The condensate (26) formed in the indirect heat exchange (25) is at least partially introduced (16) into the medium pressure column (6). The nitrogen gas fraction (20) is heated upstream of the expansion (23) to an intermediate temperature which lies between the temperatures at the cold and warm ends of the main heat exchanger (2).
Figure 00000001
EP19980107748 1997-05-15 1998-04-28 Process and apparatus for the production of nitrogen by cryogenic air separation Expired - Lifetime EP0878678B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19980107748 EP0878678B1 (en) 1997-05-15 1998-04-28 Process and apparatus for the production of nitrogen by cryogenic air separation

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19720453 1997-05-15
DE19720453A DE19720453A1 (en) 1997-05-15 1997-05-15 Process and device for the production of nitrogen by low-temperature separation of air
EP97113507 1997-08-05
EP97113507A EP0878677A1 (en) 1997-05-15 1997-08-05 Process and apparatus for the production of nitrogen by cryogenic air separation
EP19980107748 EP0878678B1 (en) 1997-05-15 1998-04-28 Process and apparatus for the production of nitrogen by cryogenic air separation

Publications (3)

Publication Number Publication Date
EP0878678A2 EP0878678A2 (en) 1998-11-18
EP0878678A3 true EP0878678A3 (en) 1999-04-07
EP0878678B1 EP0878678B1 (en) 2002-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980107748 Expired - Lifetime EP0878678B1 (en) 1997-05-15 1998-04-28 Process and apparatus for the production of nitrogen by cryogenic air separation

Country Status (4)

Country Link
EP (1) EP0878678B1 (en)
DE (1) DE59806495D1 (en)
DK (1) DK0878678T3 (en)
ES (1) ES2189032T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110192194A1 (en) * 2010-02-11 2011-08-11 Henry Edward Howard Cryogenic separation method and apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548222B1 (en) * 1975-10-28 1977-01-27 Linde Ag Method and device for air separation
US4617036A (en) * 1985-10-29 1986-10-14 Air Products And Chemicals, Inc. Tonnage nitrogen air separation with side reboiler condenser
DE3528374A1 (en) * 1985-08-07 1987-02-12 Linde Ag METHOD AND DEVICE FOR PRODUCING NITROGEN WITH OVER-ATMOSPHERIC PRESSURE
DE4441920C1 (en) * 1994-11-24 1996-04-04 Linde Ag Method and appliance for obtaining nitrogen by cryogenic separation of air

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548222B1 (en) * 1975-10-28 1977-01-27 Linde Ag Method and device for air separation
DE3528374A1 (en) * 1985-08-07 1987-02-12 Linde Ag METHOD AND DEVICE FOR PRODUCING NITROGEN WITH OVER-ATMOSPHERIC PRESSURE
US4617036A (en) * 1985-10-29 1986-10-14 Air Products And Chemicals, Inc. Tonnage nitrogen air separation with side reboiler condenser
DE4441920C1 (en) * 1994-11-24 1996-04-04 Linde Ag Method and appliance for obtaining nitrogen by cryogenic separation of air

Also Published As

Publication number Publication date
DK0878678T3 (en) 2003-03-10
EP0878678B1 (en) 2002-12-04
EP0878678A2 (en) 1998-11-18
DE59806495D1 (en) 2003-01-16
ES2189032T3 (en) 2003-07-01

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