EP0775881B1 - Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck - Google Patents
Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck Download PDFInfo
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- EP0775881B1 EP0775881B1 EP96118281A EP96118281A EP0775881B1 EP 0775881 B1 EP0775881 B1 EP 0775881B1 EP 96118281 A EP96118281 A EP 96118281A EP 96118281 A EP96118281 A EP 96118281A EP 0775881 B1 EP0775881 B1 EP 0775881B1
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- pressure column
- low
- pressure
- column
- vapour
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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
- F25J3/04763—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
- F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
- F25J3/04915—Combinations of different material exchange elements, e.g. within different 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
- F25J3/04006—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
- F25J3/04084—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 nitrogen
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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
- F25J3/04006—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
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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
- F25J3/04006—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
- F25J3/04103—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 using solely hydrostatic liquid head
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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
- F25J3/04151—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
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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
- F25J3/04321—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 oxygen
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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
- F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04363—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of oxygen
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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
- F25J3/04406—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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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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
- F25J3/04763—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
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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
- F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
Definitions
- the invention relates to a process for the production of oxygen and nitrogen superatmospheric pressure due to low temperature separation of air in one Rectification column system, which has a pressure column and a low pressure column, with steps (a) to (g) listed in claim 1.
- the invention is therefore based on the object, a method and a specify appropriate device of the type mentioned, with which at the same time, oxygen and nitrogen are obtained under superatmospheric pressure can be and which work particularly economically, especially through a high yield of oxygen.
- This object is achieved in that the pressure of the liquid from the lower Area of the low pressure column upstream of the indirect heat exchange with condensing steam from the top of the pressure column is increased and that part of the steam obtained in indirect heat exchange, which in the low pressure column is returned before being introduced into the low pressure column is relaxed.
- the pressures of the pressure column and the low pressure column decoupled that is, the pressure column can operate under particularly high pressure be (for example 8 bar, 10 bar or higher), whereas the pressure in the Low pressure column only at just above atmospheric pressure, for example at 1.2 to 2.0 bar, preferably 1.5 to 1.6 bar.
- the pressure column pressure can to the desired nitrogen product pressure - so that the nitrogen product compressor can either be made smaller or can be omitted -, and the low pressure column can still operate with an optimal separation effect become.
- the pressure of the liquid from the lower area of the low pressure column can be raised by any of the known methods, for example by a pump and / or by a hydrostatic potential.
- the final pressure must are sufficient so that the liquid in the indirect heat exchange with the Pressure column pressure condensing vapor evaporates from the pressure column.
- Indirect heat exchange serves on the one hand to cool the head of the pressure column - es becomes liquid return for the pressure column and if necessary for the Low-pressure column - on the other hand - creates a detour through an oxygen cycle with pressure increase in the liquid and gaseous expansion - for generation of rising steam for the low pressure column.
- the steam obtained in indirect heat exchange is preferred warmed against feed air. Usually only a part of the warmed gas relaxed in the low pressure column. The rest can then continue on Ambient temperature warmed and as a gaseous oxygen pressure product be dissipated.
- the two liquids passed from the pressure column to the low pressure column usually consist of sump liquid from the pressure column (first Liquid fraction) or from liquid from the top of the pressure column or from an intermediate point, the 10 to 30, preferably 20 theoretical floors below of the head of the pressure column (second liquid fraction).
- the relaxation of the indirect heat exchange through evaporation of the Liquid obtained from the lower part of the low pressure column is vapor preferably performed work, for example in a Expansion turbine. A lot of process cold can thus be obtained. It is favorable if a magnetic or gas-bearing turbine is used as the expansion turbine Turbine is used.
- At least part of the relaxation of the indirect Heat generated steam can generate energy for compression a process stream can be used, for example for compressing a nitrogenous fraction from the low pressure column to regenerate one Molecular sieve necessary pressure.
- the devices for relaxation or compression are preferably mechanically coupled, for example by a common wave.
- the steam obtained in indirect heat exchange can be upstream of the Relaxation can be heated in the low pressure column. This warming takes place preferably in a main heat exchanger, which is also used to cool the Operating air serves.
- the part of the steam to be relaxed is generally led out of the main heat exchanger at a temperature between the Temperatures at the cold and warm end of the main heat exchanger.
- an argon-containing fraction can be transferred from the low pressure column into a Raw argon column can be introduced. Details of such argon production are for example in EP-B-377117, EP-A-628777 or EP-A-669509 described.
- the invention also relates to a device for producing oxygen and Nitrogen under superatmospheric pressure due to the low temperature decomposition of air according to claims 7 to 11.
- Compressed and cleaned from water and carbon dioxide feed air 1 is in one Main heat exchanger 2 cooled to about dew point and via line 3 under one Pressure of 10 bar fed into a pressure column 4.
- vaporous nitrogen which still contains about 1 ppm of impurities
- Line 10 removed and to a part 11 in a head capacitor trained condenser-evaporator 12 condenses; the rest will be on line 14 led to the main heat exchanger 2, warmed there to about ambient temperature and discharged at 15 as a gaseous pressure product. That in the condenser evaporator 12 obtained condensate 13 serves as a return for the pressure column 4; to the others, it can be partially discharged as a liquid product 16.
- Oxygen-enriched bottom liquid 5 is the first liquid fraction from the Throttled pressure column in a low pressure column 7 (6).
- a second liquid fraction 8 20 theoretical plates below the head of the pressure column are subtracted and above the first liquid fraction, preferably at the top, into the low pressure column relaxed 9. (Alternatively or additionally, the one drawn off via line 16 could also be used Liquid is applied to the low pressure column 7.)
- the bottom liquid of the low pressure column 7 (third liquid fraction 17) is by a Pump 18 brought to a pressure of about 5 bar, subcooled in a countercurrent and introduced into the evaporation space of the condenser-evaporator 12. A part the pumped liquid can be withdrawn as product 21 if required.
- the one in Condenser-evaporator 12 won steam 22 is in the main heat exchanger 2 introduced and in part at the warm end 23 as a gaseous Print product won.
- the rest is at an intermediate point from the Main heat exchanger 2 led out (24), in a turbine 25 to work about low pressure column pressure relaxed and through the counterflow 19 in the Low pressure column 7 fed back.
- Nitrogen-containing residual gas 28 is drawn off from the top of the low-pressure column 7, first warmed against the two liquid fractions from the pressure column (29) and finally continued to the main heat exchanger 2.
- the heated residual gas 30 can be discarded, for example, or as a regeneration gas for a molecular sieve system be used for air purification.
- the two exemplary embodiments can additionally have a crude argon column 34 be equipped; for the case of FIG. 1, this is detailed in FIG. 3.
- An argon vapor fraction 35 is emitted from a location of relatively high argon content led in the low pressure column 7 to the crude argon column 34 and there into a - for example, via liquid line 36 - crude argon fraction and into one Residual fraction 37 disassembled.
- the head cooling 39 of the raw argon column 34 is carried out by Evaporation of a portion 38 of the bottom liquid 5 from the pressure column causes.
- the steam 40 thereby generated is fed into the low-pressure column 7.
- the mass transfer elements in the pressure column formed by still bottoms, those in the low pressure column and optionally in the crude argon column by orderly packing. Basically, however, at Invention in all columns conventional still bottoms, packing (disordered Pack) and / or ordered pack. Combinations too Different types of elements are possible in one column. Because of the small Ordered packs, especially in the low pressure column, become pressure loss prefers.
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- 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)
Description
- Figur 1
- ein erstes, besonders bevorzugtes Ausführungsbeispiel des Verfahrens und der Vorrichtung gemäß der Erfindung,
- Figur 2
- ein weiteres Ausführungsbeispiel mit Rückverdichtung des stickstoffreichen Restgases aus der Niederdrucksäule und
- Figur 3
- ein drittes Ausführungsbeispiel mit Argongewinnung.
Claims (11)
- Verfahren zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck durch Tieftemperaturzerlegung von Luft in einem Rektifiziersäulensystem, das eine Drucksäule (4) und eine Niederdrucksäule (7) aufweist, mit folgenden Schritten:(a) Einführung von verdichteter und gereinigter Einsatzluft (1, 3) in die Drucksäule (4),(b) Einführung (6) mindestens eines Teils einer ersten Flüssigfraktion (5) aus dem unteren Bereich der Drucksäule (4) in die Niederdrucksäule (7),(c) Einführung (9) einer zweiten Flüssigfraktion (8) aus dem oberen oder mittleren Bereich der Drucksäule (4) in die Niederdrucksäule (7),(d) Verdampfung einer dritten Flüssigfraktion (17) aus dem unteren Bereich der Niederdrucksäule (7) in indirektem Wärmeaustausch (12) mit kondensierendem Dampf (11) aus dem oberen Bereich der Drucksäule (4),(e) Einleitung mindestens eines Teils des bei dem indirekten Wärmeaustausch gewonnenen Dampfs (22, 24, 26, 27) in die Niederdrucksäule (7),(f) Einleitung mindestens eines Teils des bei dem indirekten Wärmeaustausch gewonnenen Kondensats (13) in die Drucksäule (4),(g) Entnahme einer Druckstickstofffraktion (10, 14, 15) als Produkt aus dem oberen Bereich der Drucksäule (4),(h) der Druck der dritten Flüssigfraktion (17) aus dem unteren Bereich der Niederdrucksäule (7) stromaufwärts des indirekten Wärmeaustauschs (12) mit kondensierendem Dampf (11) aus dem oberen Bereich der Drucksäule (4) erhöht wird und(i) derjenige Teil (24) des bei dem indirekten Wärmeaustausch gewonnenen Dampfs, der in die Niederdrucksäule (7) zurückgeführt wird, vor der Einleitung (27) in die Niederdrucksäule (7) entspannt (25) wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Entspannung (25) des bei dem indirekten Wärmeaustausch gewonnenen Dampfs gemäß Schritt (i) arbeitsleistend durchgeführt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß mindestens ein Teil der bei der Entspannung (25) des bei dem indirekten Wärmeaustausch gewonnenen Dampfs erzeugten Energie zur Verdichtung (32) eines Prozeßstroms (31) verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der bei dem indirekten Wärmeaustausch gewonnene Dampf (22) stromaufwärts der Entspannung (25) gemäß Schritt (i) erwärmt (2) wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein Teil (23) des bei dem indirekten Wärmeaustausch (12) gewonnenen Dampfs (22) als Sauerstoffdruckprodukt gewonnen wird.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine argonhaltige Fraktion (35) aus der Niederdrucksäule (7) in eine Rohargonsäule (34) eingeleitet wird.
- Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck durch Tieftemperaturzerlegung von Luft in einem Rektifiziersäulensystem, das eine Drucksäule (4) und eine Niederdrucksäule (7) aufweist, mit(a) einer Einsatzluftleitung (1, 3) zur Einführung von verdichteter und gereinigter Einsatzluft in die Drucksäule (4),(b) einer ersten Flüssigfraktionsleitung (5), die den unteren Bereich der Drucksäule (4) mit der Niederdrucksäule (7) verbindet,(c) einer zweiten Flüssigfraktionsleitung (8) die den oberen oder mittleren Bereich der Drucksäule (4) mit der Niederdrucksäule (7) verbindet,(d) einem Kondensator-Verdampfer (12) dessen Verdampfungsraum über eine dritte Flüssigfraktionsleitung (17) mit dem unteren Bereich der Niederdrucksäule (7) und dessen Kondensationsraum (über 10, 11) mit dem oberen Bereich der Drucksäule (4) verbunden ist,(e) einer Dampfleitung (22, 24, 26, 27) zwischen dem Verdampfungsraum des Kondensator-Verdampfers (12) und der Niederdrucksäule (7),(f) einer vierten Flüssigfraktionsleitung (13) zwischen dem Kondensationsraum des Kondensator-Verdampfers (12) und der Drucksäule (4) und mit(g) einer Druckstickstoffproduktleitung (10, 14, 15), die mit dem oberen Bereich der Drucksäule (4) verbunden ist,(h) Mittel (18) zur Erhöhung des Drucks in der dritten Flüssigfraktionsleitung (17) und(i) Mittel (25) zur Verringerung des Drucks in der Dampfleitung (22, 24, 26, 27) zwischen Kondensator-Verdampfer (12) und Niederdrucksäule (7).
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Mittel zur Verringerung des Drucks eine Entspannungsmaschine (25) aufweisen.
- Vorrichtung nach Anspruch 7 oder 8, gekennzeichnet durch eine Sauerstoffproduktleitung (23), die mit der Dampfleitung (22) verbunden ist.
- Vorrichtung nach einem der Ansprüche 7 bis 9, gekennzeichnet durch Mittel (33) zur Übertragung von mechanischer Energie von der Entspannungsmaschine (25) auf einen Verdichter (32) zur Verdichtung eines Prozeßstroms (31).
- Vorrichtung nach einem der Ansprüche 7 bis 10, gekennzeichnet durch eine Rohargonsäule (34), die mit der Niederdrucksäule verbunden (35, 37) ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19543953 | 1995-11-25 | ||
DE19543953A DE19543953C1 (de) | 1995-11-25 | 1995-11-25 | Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0775881A2 EP0775881A2 (de) | 1997-05-28 |
EP0775881A3 EP0775881A3 (de) | 1997-08-20 |
EP0775881B1 true EP0775881B1 (de) | 2000-05-17 |
Family
ID=7778392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96118281A Expired - Lifetime EP0775881B1 (de) | 1995-11-25 | 1996-11-14 | Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck |
Country Status (9)
Country | Link |
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US (1) | US5749246A (de) |
EP (1) | EP0775881B1 (de) |
JP (1) | JPH09170874A (de) |
KR (1) | KR970028406A (de) |
BR (1) | BR9605678A (de) |
CA (1) | CA2191161A1 (de) |
DE (2) | DE19543953C1 (de) |
TW (1) | TW332856B (de) |
ZA (1) | ZA969797B (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1045154B1 (de) | 1999-04-15 | 2002-09-18 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Verbindungsanordnung für ein auf einem Bolzen eines Stellgliedes zu montierendes Ende eines Betätigungszuges |
FR2860576A1 (fr) * | 2003-10-01 | 2005-04-08 | Air Liquide | Appareil et procede de separation d'un melange gazeux par distillation cryogenique |
KR20230069966A (ko) * | 2020-09-17 | 2023-05-19 | 린데 게엠베하 | 혼합 가스 터빈을 이용한 공기의 극저온 분리를 위한 공정 및 장치 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2402246A1 (de) * | 1974-01-18 | 1975-07-31 | Linde Ag | Verfahren zur gewinnung von sauerstoff mittlerer reinheit |
US4224045A (en) * | 1978-08-23 | 1980-09-23 | Union Carbide Corporation | Cryogenic system for producing low-purity oxygen |
DE3840506A1 (de) * | 1988-12-01 | 1990-06-07 | Linde Ag | Verfahren und vorrichtung zur luftzerlegung |
DE4126945A1 (de) * | 1991-08-14 | 1993-02-18 | Linde Ag | Verfahren zur luftzerlegung durch rektifikation |
US5195324A (en) * | 1992-03-19 | 1993-03-23 | Prazair Technology, Inc. | Cryogenic rectification system for producing nitrogen and ultra high purity oxygen |
DE4317916A1 (de) * | 1993-05-28 | 1994-12-01 | Linde Ag | Verfahren und Vorrichtung zur Gewinnung von Argon |
CA2142318A1 (en) * | 1994-02-24 | 1995-08-25 | Horst Corduan | Process and apparatus for recovery of pure argon |
US5456083A (en) * | 1994-05-26 | 1995-10-10 | The Boc Group, Inc. | Air separation apparatus and method |
-
1995
- 1995-11-25 DE DE19543953A patent/DE19543953C1/de not_active Expired - Fee Related
-
1996
- 1996-11-14 DE DE59605238T patent/DE59605238D1/de not_active Expired - Fee Related
- 1996-11-14 EP EP96118281A patent/EP0775881B1/de not_active Expired - Lifetime
- 1996-11-22 BR BR9605678A patent/BR9605678A/pt not_active Application Discontinuation
- 1996-11-22 TW TW085114405A patent/TW332856B/zh active
- 1996-11-22 ZA ZA969797A patent/ZA969797B/xx unknown
- 1996-11-25 KR KR1019960058616A patent/KR970028406A/ko not_active Application Discontinuation
- 1996-11-25 CA CA002191161A patent/CA2191161A1/en not_active Abandoned
- 1996-11-25 US US08/756,012 patent/US5749246A/en not_active Expired - Fee Related
- 1996-11-25 JP JP8327988A patent/JPH09170874A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US5749246A (en) | 1998-05-12 |
MX9605785A (es) | 1998-05-31 |
ZA969797B (en) | 1997-06-10 |
BR9605678A (pt) | 1998-08-18 |
CA2191161A1 (en) | 1997-05-26 |
EP0775881A3 (de) | 1997-08-20 |
JPH09170874A (ja) | 1997-06-30 |
DE19543953C1 (de) | 1996-12-19 |
DE59605238D1 (de) | 2000-06-21 |
KR970028406A (ko) | 1997-06-24 |
TW332856B (en) | 1998-06-01 |
EP0775881A2 (de) | 1997-05-28 |
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