EP1022530A1 - Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff - Google Patents
Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff Download PDFInfo
- Publication number
- EP1022530A1 EP1022530A1 EP00100823A EP00100823A EP1022530A1 EP 1022530 A1 EP1022530 A1 EP 1022530A1 EP 00100823 A EP00100823 A EP 00100823A EP 00100823 A EP00100823 A EP 00100823A EP 1022530 A1 EP1022530 A1 EP 1022530A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure column
- low
- liquid
- nitrogen
- residual 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
Links
Images
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
- F25J3/04424—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 without thermally coupled high and low pressure columns, i.e. a so-called split columns
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- 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
-
- 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
- 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
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- 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
Definitions
- the invention relates to a process for the production of pressure nitrogen by Cryogenic separation of air in a rectification system using a pressure column and has a low pressure column, wherein in the process feed air into the Pressure column initiated, an oxygen-containing liquid fraction from the pressure column removed and fed into the low pressure column, gaseous nitrogen the low pressure column in a top condenser through indirect heat exchange is at least partially condensed with an evaporating liquid, more liquid Nitrogen is withdrawn from the low pressure column or from its top condenser and is introduced into the pressure column and from the evaporating liquid resulting residual gas is removed from the top condenser.
- the invention is therefore based on the object of a method of the beginning Specify the type and a corresponding device that is economical work particularly cheap.
- This object is achieved in that the residual gas from the top condenser Low pressure column is relaxed while working.
- the cold is used to compensate for the insulation losses and may be required for product liquefaction, particularly energetically generated cheap way.
- No process stream is required for the generation of cold to be compacted; no products are lost.
- the pressure column is under a head pressure of, for example, 9 to 10 bar, preferably operated from 9.2 to 9.5 bar.
- the operating pressure of the Low pressure column is, for example, 5.7 to 6.3 bar, preferably 5.9 to 6.1 bar on the head.
- the evaporation chamber of the top condenser of the low pressure column is standing under a pressure of, for example, 2.4 to 3.0 bar, preferably 2.6 to 2.8 bar.
- the residual gas is upstream of the work relaxation is warmed up.
- the heating of the residual gas is preferably by indirect Heat exchange is carried out with a process gas, in particular with feed air.
- the main heat exchanger can be used for this Cooling of feed air serves.
- Part of the withdrawn from the low pressure column or from its top condenser liquid nitrogen can be obtained as a liquid product.
- the liquid product can, for example, together with that to be introduced into the pressure column Liquid nitrogen from the low pressure column or from its Head condenser removed and upstream or downstream of a pump be branched off to increase the pressure to at least pressure column pressure serves.
- the invention also relates to a device for extracting pressurized nitrogen according to claim 4.
- An oxygen-containing liquid fraction (8) from the bottom of the pressure column is in one Cooled subcooler 9 and a first part 10 in the low pressure column 5th initiated.
- a second part 11 of the bottom liquid of the pressure column is in the Evaporation space introduced a first condenser-evaporator 6, the Head condenser of the pressure column forms. That in the first condenser evaporator generated gas 12 is also introduced into the low pressure column 5.
- a small Amount is removed as rinsing liquid 39.
- gaseous nitrogen 14 is removed and one first part 15 warmed to about ambient temperature in the main heat exchanger 2 and discharged as a pressure nitrogen product.
- a second part 17 of the top nitrogen Pressure column is at least partially in the first condenser-evaporator 6 liquefied.
- the condensate 18 generated is used as a return to the top of the Pressure column 4 abandoned (19).
- the second condenser-evaporator connected as the top condenser of the low-pressure column 5 7 is operated with liquid 20 from the bottom of the low pressure column. This evaporates and is - aside from a small flush volume 21 Residual gas 22 from the evaporation space of the second condenser-evaporator deducted.
- Top nitrogen 23 of the low pressure column is on the liquefaction side of the second condenser-evaporator and at least partially condensed. Part of the liquid nitrogen generated thereby serves as a return for the Low pressure column 5.
- Another part 26 is sucked in by a pump 27 and in brought liquid state to about pressure column pressure.
- the liquid pressure nitrogen 28 is fed via lines 29 and 19 to the head of the pressure column 4. If if desired, part 30 can be obtained as a liquid product.
- the residual gas 22, 31, 32, 33 from the top condenser 7 of the low pressure column is in Subcooler 9 and in the main heat exchanger 2 to an intermediate temperature warmed up and working according to the invention in a relaxation machine 34 relaxed.
- the relaxed residual gas 35 is the cold end of the Main heat exchanger supplied (36).
- the warm residual gas 37 can Regeneration of a device, not shown, for cleaning the feed air or used as a by-product or released into the atmosphere.
- the Relaxation machine 34 is preferably designed as a turbine and can by any known device can be braked. Preferably a dissipative Brake 38 used.
- a part 11 of the pressure column sump liquid 8 as Coolant for the first condenser-evaporator 6 can cool the head Pressure column also in the known manner by means of the sump liquid Low pressure column.
- pressure column 4 and low pressure column 5 integrated into a double column and / or the first condenser-evaporator in the Bottom of the low pressure column 4 may be arranged.
- the oxygen-containing liquid Fraction 8 from the bottom of the pressure column is then preferably completely in liquid state fed to the low pressure column 5 (10).
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)
- Treating Waste Gases (AREA)
Abstract
Description
Claims (4)
- Verfahren zur Gewinnung von Druckstickstoff durch Tieftemperaturzerlegung von Luft in einem Rektifiziersystem, das eine Drucksäule (4) und eine Niederdrucksäule (5) aufweist, wobei bei dem Verfahren Einsatzluft (1, 3) in die Drucksäule (4) eingeleitet, eine sauerstoffhaltige flüssige Fraktion (8, 10) aus der Drucksäule (4) entnommen und in die Niederdrucksäule (5) eingespeist wird, gasförmiger Stickstoff (23) aus der Niederdrucksäule (5) in einem Kopfkondensator (7) durch indirekten Wärmeaustausch mit einer verdampfenden Flüssigkeit (20) mindestens teilweise kondensiert wird, flüssiger Stickstoff (24, 26, 28, 29, 19) aus der Niederdrucksäule (5) oder aus deren Kopfkondensator (7) abgezogen und in die Drucksäule (4) eingeleitet wird und aus der verdampfenden Flüssigkeit (20) entstandenes Restgas (22, 31, 32, 33) aus dem Kopfkondensator abgeführt wird, dadurch gekennzeichnet, daß das Restgas (22, 31, 32, 33) arbeitsleistend entspannt (34) wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Restgas (22, 31, 32, 33) stromaufwärts der arbeitsleistenden Entspannung angewärmt (9, 2) wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Teil des aus der Niederdrucksäule (5) oder aus deren Kopfkondensator (7) abgezogenen flüssigen Stickstoffs (24, 26, 28) als Flüssigprodukt (30) gewonnen wird.
- Vorrichtung zur Gewinnung von Druckstickstoff durch Tieftemperaturzerlegung von Luft mit einem Rektifiziersystem, das eine Drucksäule (4) und eine Niederdrucksäule (5) aufweist, mit einer Einsatzleitung (1, 3) zum Einleiten von Einsatzluft in die Drucksäule (4), mit einer Flüssigkeitsleitung (8,10) zum Überleiten einer sauerstoffhaltigen flüssigen Fraktion aus der Drucksäule (4) in die Niederdrucksäule (5), einem Kopfkondensator (7), dessen Verflüssigungsraum mit dem oberen Bereich der Niederdrucksäule (5) verbunden (23, 24, 25) ist und dessen Verdampfungsraum mit einer Kühlmittelleitung (20) zum Einleiten einer Kühlflüssigkeit verbunden ist, mit einer Flüssigstickstoffleitung (24, 26, 28, 29,19) zum Einleiten flüssigen Stickstoffs aus der Niederdrucksäule (5) oder aus dem Kopfkondensator (7) in die Drucksäule (4) und mit einer Restgasleitung (22, 31, 32, 33), die mit dem Verdampfungsraum des Kopfkondensators (7) verbunden ist, gekennzeichnet durch eine Entspannungsmaschine (34), deren Eintritt mit der Restgasleitung (22, 31, 32, 33) verbunden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19902255 | 1999-01-21 | ||
DE19902255A DE19902255A1 (de) | 1999-01-21 | 1999-01-21 | Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1022530A1 true EP1022530A1 (de) | 2000-07-26 |
EP1022530B1 EP1022530B1 (de) | 2005-03-16 |
Family
ID=7894931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100823A Expired - Lifetime EP1022530B1 (de) | 1999-01-21 | 2000-01-17 | Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1022530B1 (de) |
AT (1) | ATE291210T1 (de) |
DE (2) | DE19902255A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6490884B2 (en) | 2000-11-24 | 2002-12-10 | Linde Ag | Process and device for production of oxygen and nitrogen |
EP3290843A3 (de) * | 2016-07-12 | 2018-06-13 | Linde Aktiengesellschaft | Verfahren und vorrichtung zur erzeugung von druckstickstoff und flüssigstickstoff durch tieftemperaturzerlegung von luft |
EP3521739A1 (de) | 2018-02-02 | 2019-08-07 | Linde Aktiengesellschaft | Verfahren und vorrichtung zur gewinnung von druckstickstoff durch tieftemperaturzerlegung von luft |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4453957A (en) * | 1982-12-02 | 1984-06-12 | Union Carbide Corporation | Double column multiple condenser-reboiler high pressure nitrogen process |
DE3606967A1 (de) * | 1985-03-11 | 1986-09-11 | L'Air Liquide, Societé Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude, Paris | Verfahren zur herstellung von stickstoff unter druck und anlage zur durchfuehrung des verfahrens |
EP0496355A1 (de) * | 1991-01-22 | 1992-07-29 | Praxair Technology, Inc. | Verfahren und Vorrichtung zur Herstellung von Stickstoff unter erhöhtem Druck |
US5697229A (en) * | 1996-08-07 | 1997-12-16 | Air Products And Chemicals, Inc. | Process to produce nitrogen using a double column plus an auxiliary low pressure separation zone |
DE19819263A1 (de) * | 1998-04-30 | 1999-12-02 | Linde Ag | Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff |
-
1999
- 1999-01-21 DE DE19902255A patent/DE19902255A1/de not_active Withdrawn
-
2000
- 2000-01-17 DE DE50009751T patent/DE50009751D1/de not_active Expired - Fee Related
- 2000-01-17 EP EP00100823A patent/EP1022530B1/de not_active Expired - Lifetime
- 2000-01-17 AT AT00100823T patent/ATE291210T1/de not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4453957A (en) * | 1982-12-02 | 1984-06-12 | Union Carbide Corporation | Double column multiple condenser-reboiler high pressure nitrogen process |
DE3606967A1 (de) * | 1985-03-11 | 1986-09-11 | L'Air Liquide, Societé Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude, Paris | Verfahren zur herstellung von stickstoff unter druck und anlage zur durchfuehrung des verfahrens |
EP0496355A1 (de) * | 1991-01-22 | 1992-07-29 | Praxair Technology, Inc. | Verfahren und Vorrichtung zur Herstellung von Stickstoff unter erhöhtem Druck |
US5697229A (en) * | 1996-08-07 | 1997-12-16 | Air Products And Chemicals, Inc. | Process to produce nitrogen using a double column plus an auxiliary low pressure separation zone |
DE19819263A1 (de) * | 1998-04-30 | 1999-12-02 | Linde Ag | Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6490884B2 (en) | 2000-11-24 | 2002-12-10 | Linde Ag | Process and device for production of oxygen and nitrogen |
EP3290843A3 (de) * | 2016-07-12 | 2018-06-13 | Linde Aktiengesellschaft | Verfahren und vorrichtung zur erzeugung von druckstickstoff und flüssigstickstoff durch tieftemperaturzerlegung von luft |
US10488106B2 (en) | 2016-07-12 | 2019-11-26 | Linde Aktiengesellschaft | Method and apparatus for producing compressed nitrogen and liquid nitrogen by cryogenic separation of air |
EP3521739A1 (de) | 2018-02-02 | 2019-08-07 | Linde Aktiengesellschaft | Verfahren und vorrichtung zur gewinnung von druckstickstoff durch tieftemperaturzerlegung von luft |
DE102018000842A1 (de) | 2018-02-02 | 2019-08-08 | Linde Aktiengesellschaft | Verfahren und Vorrichtung zur Gewinnung von Druckstickstoff durch Tieftemperaturzerlegung von Luft |
Also Published As
Publication number | Publication date |
---|---|
DE50009751D1 (de) | 2005-04-21 |
ATE291210T1 (de) | 2005-04-15 |
DE19902255A1 (de) | 2000-07-27 |
EP1022530B1 (de) | 2005-03-16 |
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