EP0641982B1 - Procédé et installation de production d'au moins un gaz de l'air sous pression - Google Patents
Procédé et installation de production d'au moins un gaz de l'air sous pression Download PDFInfo
- Publication number
- EP0641982B1 EP0641982B1 EP94401838A EP94401838A EP0641982B1 EP 0641982 B1 EP0641982 B1 EP 0641982B1 EP 94401838 A EP94401838 A EP 94401838A EP 94401838 A EP94401838 A EP 94401838A EP 0641982 B1 EP0641982 B1 EP 0641982B1
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- EP
- European Patent Office
- Prior art keywords
- pressure
- air
- column
- heat
- gas
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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
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
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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
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
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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
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
- F25J3/04175—Hot end purification of the feed air by adsorption of the impurities at a pressure of substantially more than the highest pressure 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
- F25J3/0429—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
- F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure 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
- F25J3/04406—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
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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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
- F25J3/04575—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating for a gas expansion plant, e.g. dilution of the combustion gas in a gas turbine
- F25J3/04581—Hot gas expansion of indirect heated 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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04612—Heat exchange integration with process streams, e.g. from the air gas consuming unit
- F25J3/04618—Heat exchange integration with process streams, e.g. from the air gas consuming unit for cooling an air stream fed to the air fractionation unit
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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
- 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
- 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
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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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/52—Oxygen production with multiple purity O2
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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
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
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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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
- F25J2240/12—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/04—Internal refrigeration with work-producing gas expansion loop
Definitions
- EP-A-0 552 747 describes a process in which the waste gas from the low pressure column is withdrawn from the exchange line at a temperature intermediate and relaxed in a turbine which ensures the cold resistance of the installation.
- the invention aims to allow a reduction in the production of liquid for a given oxygen and / or nitrogen production capacity gas under pressure, economically from the point of view of energy performance.
- the invention also relates to an installation intended for setting using such a method.
- This installation of the type comprising a double distillation column comprising a low pressure column operating under a pressure known as low pressure and producing a waste gas at the top, and a medium pressure column operating under pressure so-called medium pressure; compression means for bring all of the air to be distilled to at least one high pressure significantly higher than medium pressure, these means comprising a main compressor; of means for withdrawing from the double column and pumping at least one liquid product resulting from the distillation; a heat exchange line connecting heat exchange air and said liquid product; and an expansion turbine for part of this air, the intake of this turbine being connected to an intermediate point of the heat exchange line and its exhaust being connected to the medium pressure column, is characterized in that it includes a second expansion turbine whose admission is linked to the exit of passages from heating of the waste gas from the exchange line thermal, at the hot end of it.
- the installation shown in Figure 1 is intended to produce gaseous oxygen under high pressure from about 10 to 100 bar, liquid oxygen and liquid nitrogen.
- This installation essentially includes: a main air compressor 1 itself comprising at minus a medium pressure stage 1A and a high stage pressure 1B; an adsorption purification device 2; a blower-turbine assembly comprising a blower 3 and a turbine 4 whose wheels are set on the same tree; an atmospheric or water cooler 5 for the blower; a heat exchange line 6; a first auxiliary heat exchanger 7 and a second exchanger auxiliary heat 8; a second expansion turbine 9 braked by an alternator 10; a double column of distillation 11 comprising a medium pressure column 12 and a low pressure column 13 coupled by a vaporizer-condenser 14 which puts in exchange relation thermal nitrogen at the top of column 12 and oxygen column 13 tank liquid; an oxygen pump liquid 15; a storage 16 of liquid oxygen at the atmospheric pressure; a storage 17 of liquid nitrogen at atmospheric pressure; a separator pot 18; and one subcooler 19.
- column 13 is under a pressure from about 1.7 to 5 bar, and column 11 under the corresponding pressure from 6.5 to 16 bars approximately.
- Liquid oxygen is drawn off in a tank column 13. A fraction goes directly, after sub-cooling in 19 and expansion to atmospheric pressure in an expansion valve 24, in the storage 16, while the rest is brought by pump 15 to the high desired production pressure, then vaporized and reheated at room temperature in the exchange line thermal before being recovered via a pipe 25.
- liquid nitrogen under the medium pressure withdrawn at the head of column 12, is sub-cooled in 19, expanded to atmospheric pressure in an expansion valve 26, and introduced into the pot separator 18.
- the liquid phase is sent to the storage 17, while the vapor phase is combined at the impure nitrogen at the top of column 13, then the mixture is reheated in 19 then in 6.
- the waste gas thus heated at the room temperature is overheated in 7 then relaxed to roughly at atmospheric pressure in 9 and then the gas relaxed is warmed up to 8. It can then, before being evacuated from the installation, serve to regenerate the absorbent device 2.
- the invention also applies to the production of nitrogen gas under high pressure, carried by a pump (not shown) at the desired high pressure then vaporized in the heat exchange line, and / or to the production of oxygen and / or nitrogen under several pressures, using multiple high air pressures.
- the vaporization of the liquid (s) can be carried out not concomitantly with air liquefaction, with a knee liquefying air below the oxygen vaporization temperature, or so concomitant with this liquefaction.
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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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
- on distille de l'air dans une installation comprenant un compresseur principal d'air, une double colonne de distillation comprenant une colonne basse pression fonctionnant sous une pression dite basse pression, et une colonne moyenne pression fonctionnant sous une pression dite moyenne pression, et une ligne d'échange thermique servant à refroidir l'air traité;
- on comprime la totalité de l'air à distiller jusqu'à au moins une haute pression d'air nettement supérieure à la moyenne pression;
- on refroidit l'air comprimé jusqu'à une température intermédiaire, et on en détend une partie dans une turbine jusqu'à la moyenne pression, avant de l'introduire dans la colonne moyenne pression;
- on liquéfie l'air non turbiné, puis on l'introduit, après détente, dans la double colonne;
- on amène au moins un produit liquide soutiré de la double colonne à la pression de production, et on vaporise ce produit liquide par échange de chaleur avec l'air et
- on réchauffe le gaz résiduaire de tête de la colonne basse pression jusqu'au bout chaud de la ligne d'échange thermique.
- on fait fonctionner la colonne basse pression sous 1,7 à 5 bars environ, et la colonne moyenne pression sous une pression correspondante de 6,5 à 16 bars environ; et
- on détend dans une seconde turbine le gaz résiduaire de tête de la colonne basse pression, après l'avoir réchauffé jusqu'au bout chaud de la ligne d'échange thermique.
- le gaz résiduaire est surchauffé, avant sa détente, par échange de chaleur avec de l'air issu d'un étage intermédiaire du compresseur principal;
- le gaz résiduaire détendu est utilisé pour refroidir l'air issu du dernier étage du compresseur principal, avant l'épuration en eau et en anhydride carbonique de cet air;
- le produit liquide est de l'oxygène impur, et on produit en outre de l'oxygène liquide plus pur, que l'on envoie à un stockage.
Claims (8)
- Procédé de production d'oxygène gazeux et/ou d'azote gazeux sous pression, du type dans lequel :on distille de l'air dans une installation comprenant un compresseur principal d'air (1), une double colonne de distillation (11) comprenant une colonne basse pression (13) fonctionnant sous une pression dite basse pression, et une colonne moyenne pression (12) fonctionnant sous une pression dite moyenne pression, et une ligne d'échange thermique (6) servant à refroidir l'air traité;on comprime (en 1, 3) la totalité de l'air à distiller jusqu'à au moins une haute pression d'air nettement supérieure à la moyenne pression;on refroidit l'air comprimé jusqu'à une température intermédiaire, et on en détend une partie dans une turbine (4) jusqu'à la moyenne pression, avant de l'introduire dans la colonne moyenne pression (12);on liquéfie l'air non turbiné, puis on l'introduit, après détente (en 20, 21), dans la double colonne;on amène (en 15) au moins un produit liquide soutiré de la double colonne à la pression de production, et on vaporise ce produit liquide par échange de chaleur avec l'air, eton réchauffe le gaz résiduaire de tête de la colonne basse pression jusqu'au bout chaud de la ligne d'échange thermique,on fait fonctionner la colonne basse pression (13) sous 1,7 à 5 bars environ, et la colonne moyenne pression (11) sous une pression correspondante de 6,5 à 16 bars environ; eton détend dans une seconde turbine (9) le gaz résiduaire de tête de la colonne basse pression, après l'avoir réchauffé jusqu'au bout chaud de la ligne d'échange thermique (6).
- Procédé suivant la revendication 1, caractérisé en ce que le gaz résiduaire est surchauffé, avant sa détente, par échange de chaleur (en 7) avec de l'air issu d'un étage intermédiaire (1A) du compresseur principal (1).
- Procédé suivant la revendication 1 ou 2, caractérisé en ce que le gaz résiduaire détendu est utilisé pour refroidir (en 8) l'air issu du dernier étage (1B) du compresseur principal (1), avant l'épuration en eau et en anhydride carbonique de cet air.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit produit liquide est de l'oxygène impur, et en ce qu'on produit en outre de l'oxygène liquide plus pur, que l'on envoie à un stockage (16).
- Installation de production d'oxygène gazeux et/ou d'azote gazeux sous pression, du type comprenant une double colonne de distillation (11) comprenant une colonne basse pression (13) fonctionnant sous une pression dite basse pression et produisant en tête un gaz résiduaire, et une colonne moyenne pression (12) fonctionnant sous une pression dite moyenne pression; des moyens de compression (1, 3) pour amener la totalité de l'air à distiller à au moins une haute pression nettement supérieure à la moyenne pression, ces moyens comprenant un compresseur principal (1); des moyens (15) de soutirage de la double colonne et de pompage d'au moins un produit liquide résultant de la distillation; une ligne d'échange thermique (6) mettant en relation d'échange thermique l'air et ledit produit liquide; et une turbine (4) de détente d'une partie de cet air, l'admission de cette turbine étant reliée à un point intermédiaire de la ligne d'échange thermique et son échappement étant relié à la colonne moyenne pression (12), caractérisée en ce qu'elle comprend une seconde turbine de détente (9) dont l'admission est reliée à la sortie de passages de réchauffement du gaz résiduaire de la ligne d'échange thermique (6), au bout chaud de celle-ci.
- Installation suivant la revendication 5, caractérisée en ce qu'elle comprend un échangeur de chaleur (7) mettant en relation d'échange thermique le gaz circulant entre ladite sortie et la seconde turbine (9) et l'air issu d'un étage intermédiaire (1A) du compresseur principal (1).
- Installation suivant la revendication 5 ou 6, caractérisée en ce qu'elle comprend un second échangeur de chaleur (8) mettant en relation d'échange thermique le gaz issu de la seconde turbine (9) et l'air issu du dernier étage (1B) du compresseur principal (1).
- Installation suivant l'une quelconque des revendications 5 à 7, caractérisée en ce que la colonne basse pression (13) comporte un tronçon de distillation entre un soutirage inférieur d'oxygène liquide destiné à être stocké et un soutirage d'oxygène liquide relié à l'aspiration de la pompe (15).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9310418 | 1993-09-01 | ||
FR9310418A FR2709538B1 (fr) | 1993-09-01 | 1993-09-01 | Procédé et installation de production d'au moins un gaz de l'air sous pression. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0641982A1 EP0641982A1 (fr) | 1995-03-08 |
EP0641982B1 true EP0641982B1 (fr) | 1998-05-06 |
Family
ID=9450479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94401838A Expired - Lifetime EP0641982B1 (fr) | 1993-09-01 | 1994-08-10 | Procédé et installation de production d'au moins un gaz de l'air sous pression |
Country Status (8)
Country | Link |
---|---|
US (1) | US5463870A (fr) |
EP (1) | EP0641982B1 (fr) |
JP (1) | JPH07151459A (fr) |
CN (1) | CN1102700A (fr) |
CA (1) | CA2131121A1 (fr) |
DE (1) | DE69410040T2 (fr) |
ES (1) | ES2118342T3 (fr) |
FR (1) | FR2709538B1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5355682A (en) † | 1993-09-15 | 1994-10-18 | Air Products And Chemicals, Inc. | Cryogenic air separation process producing elevated pressure nitrogen by pumped liquid nitrogen |
FR2730172B1 (fr) * | 1995-02-07 | 1997-03-21 | Air Liquide | Methode et appareil de surveillance de fonctionnement d'une installation de separation d'air |
US20060000358A1 (en) * | 2004-06-29 | 2006-01-05 | Rajat Agrawal | Purification and delivery of high-pressure fluids in processing applications |
CN100443838C (zh) * | 2005-04-20 | 2008-12-17 | 苏州市兴鲁空分设备科技发展有限公司 | 一种返流膨胀空气分离的方法和装置 |
US20070095100A1 (en) * | 2005-11-03 | 2007-05-03 | Rankin Peter J | Cryogenic air separation process with excess turbine refrigeration |
PL2873938T3 (pl) | 2013-11-14 | 2021-11-02 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Sposób i urządzenie do oddzielania powietrza przez destylację kriogeniczną |
CN104034123B (zh) * | 2014-06-27 | 2016-05-18 | 莱芜钢铁集团有限公司 | 一种空气分离装置积液调纯一体化作业方法 |
IT202100032876A1 (it) * | 2021-12-29 | 2023-06-29 | Rita S R L | Impianto e processo per la produzione di ossigeno e azoto gassosi mediante separazione criogenica di una miscela di gas contenente ossigeno ed azoto |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2461906A1 (fr) * | 1979-07-20 | 1981-02-06 | Air Liquide | Procede et installation cryogeniques de separation d'air avec production d'oxygene sous haute pression |
FR2652409A1 (fr) * | 1989-09-25 | 1991-03-29 | Air Liquide | Procede de production frigorifique, cycle frigorifique correspondant et leur application a la distillation d'air. |
FR2674011B1 (fr) * | 1991-03-11 | 1996-12-20 | Maurice Grenier | Procede et installation de production d'oxygene gazeux sous pression. |
US5197296A (en) * | 1992-01-21 | 1993-03-30 | Praxair Technology, Inc. | Cryogenic rectification system for producing elevated pressure product |
US5222365A (en) * | 1992-02-24 | 1993-06-29 | Praxair Technology, Inc. | Cryogenic rectification system for producing high pressure nitrogen product |
-
1993
- 1993-09-01 FR FR9310418A patent/FR2709538B1/fr not_active Expired - Fee Related
-
1994
- 1994-08-10 ES ES94401838T patent/ES2118342T3/es not_active Expired - Lifetime
- 1994-08-10 DE DE69410040T patent/DE69410040T2/de not_active Expired - Fee Related
- 1994-08-10 EP EP94401838A patent/EP0641982B1/fr not_active Expired - Lifetime
- 1994-08-22 JP JP6196772A patent/JPH07151459A/ja active Pending
- 1994-08-29 US US08/300,196 patent/US5463870A/en not_active Expired - Lifetime
- 1994-08-30 CA CA002131121A patent/CA2131121A1/fr not_active Abandoned
- 1994-08-31 CN CN94115628A patent/CN1102700A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
DE69410040D1 (de) | 1998-06-10 |
US5463870A (en) | 1995-11-07 |
ES2118342T3 (es) | 1998-09-16 |
CA2131121A1 (fr) | 1995-03-02 |
CN1102700A (zh) | 1995-05-17 |
DE69410040T2 (de) | 1999-01-28 |
EP0641982A1 (fr) | 1995-03-08 |
FR2709538A1 (fr) | 1995-03-10 |
FR2709538B1 (fr) | 1995-10-06 |
JPH07151459A (ja) | 1995-06-16 |
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