EP0694746B1 - Procédé de production d'un gaz sous pression à débit variable - Google Patents
Procédé de production d'un gaz sous pression à débit variable Download PDFInfo
- Publication number
- EP0694746B1 EP0694746B1 EP95401774A EP95401774A EP0694746B1 EP 0694746 B1 EP0694746 B1 EP 0694746B1 EP 95401774 A EP95401774 A EP 95401774A EP 95401774 A EP95401774 A EP 95401774A EP 0694746 B1 EP0694746 B1 EP 0694746B1
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- European Patent Office
- Prior art keywords
- air
- pressure
- liquid
- heat
- exchange line
- 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.)
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Classifications
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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
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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
- F25J3/04163—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
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
- F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
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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
- F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
- F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
- F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
- F25J3/04509—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or main heat exchange line
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/912—External refrigeration system
- Y10S62/913—Liquified gas
Definitions
- the pressures indicated are absolute pressures.
- condensation and “vaporization” is meant either condensation or vaporization proper, or pseudo-condensation or a pseudo-vaporization, depending on whether the pressures are sub-critical or super-critics.
- Processes of this type are sometimes called “pump and air-oxygen rocker processes or air-nitrogen ".
- the invention applies particularly to processes called “staggered bearings", the examples of which are described in the applications French patent FR-A-2,674,011; FR-A-2.688.052 and FR-A-2.692.664 and FR-A-2.721.383.
- These processes, in which the liquefaction of air takes place at a temperature below the vaporization temperature of oxygen under its vaporization pressure have advantages interesting both from the point of view of specific energy consumption, that is, the energy required to produce a given quantity gaseous oxygen under pressure.
- the invention aims to provide means for meet a variable demand for oxygen under pressure so particularly simple and without appreciable degradation of performance, nor thermally, that is to say the equilibrium of the exchange line nor on that of air distillation.
- FR-A-1,158,639 describes a process for producing oxygen under pressure in which liquid oxygen stored at low pressure is pumped then vaporized in a heat exchanger against an air flow, one of which variable quantity is condensed. The condensed air is stored and sent to the low pressure column at constant flow. Air for the column medium pressure cools in another heat exchanger against cold gases from the appliance.
- J-A-02293575 discloses a process for producing oxygen under pressure in which liquid oxygen stored at low pressure is pumped then vaporized in a heat exchanger against an air flow therein condenses. A constant flow of condensed air is sent to the column medium pressure. The rest of the air intended for this is cooled in a other heat exchanger.
- the invention relates to a method according to the claim 1.
- the invention also relates to a production installation a pressurized gas with variable flow rate according to claim 11.
- the air distillation installation shown in FIG. 1 essentially comprises: an air compressor 1, an apparatus 2 for purifying the compressed air into water and CO 2 by adsorption, this apparatus comprising two bottles of adsorption 2A, 2B, one of which operates in adsorption while the other is in the process of regeneration, a blower turbine assembly 3 comprising an expansion turbine 4 and a blower or blower 5 whose shafts are coupled, the blower being optionally equipped a refrigerant (not shown), a heat exchanger 6 constituting the heat exchange line of the installation, a double distillation column 7 comprising a medium pressure column 8 surmounted by a low pressure column 9, with a vaporizer -condenser 10 putting the overhead vapor (nitrogen) from the column 8 in heat exchange relation with the tank liquid (oxygen) from the column 9, and a liquid oxygen tank 11, the bottom of which e st connected to a liquid oxygen pump 12 and a liquid air tank 13.
- This installation is mainly intended to supply, via a pipe 15, gaseous oxygen under a predetermined high pressure, which can be between approximately 13 ⁇ 10 5 Pa and a few megaPascals.
- All of the air to be distilled is compressed by compressor 1 to a pressure higher than the average pressure of column 8 but lower than high pressure. Then the air, precooled in the vicinity of the room temperature in 19 and cooled to a temperature between + 5 ° C and + 25 ° C in 20, is purified in one, 2A for example, bottles adsorption, and fully pressurized at high pressure by the booster 5, which is driven by the turbine 4.
- the air is then introduced at the hot end of the exchanger 6 and cooled completely up to an intermediate temperature. At this temperature, a fraction of the air continues to cool and is liquefied in passages 21 of the exchanger, then left the exchange line and sent to the reservoir 13 via a line 22.
- Liquid air drawn from this reservoir 13 via a line 24 is sub-cooled in the cold part of the exchange line 6, then is expanded to the low pressure in an expansion valve 25 with adjustable opening and introduced at an intermediate level in column 9.
- part liquid air can be expanded at medium pressure and introduced into column 8.
- Low pressure nitrogen is heated in passages 32 of the exchanger 6 and then evacuated via a line 33, while the waste gas W, after heating in passages 34 of the exchanger, is used to regenerate a bottle of adsorption, the bottle 2B in the example considered, before being evacuated via a pipe 35.
- a pipe 36 has also been shown in FIG. 1 evacuation of liquid oxygen from the installation stitched on the pump discharge 12.
- the high air pressure, at the discharge of the blower, is between approximately 25 ⁇ 10 5 Pa and the condensation pressure of the air by vaporization of the oxygen under the high oxygen pressure.
- the refrigeration balance of the installation is balanced, with a temperature difference at the hot end of the heat exchange line of the order of 3 ° C. , by withdrawing from the installation at least one product, here oxygen, in liquid form, via line 36.
- the liquid air contained in the reservoir 13 being at the high pressure, its latent heat of liquefaction is low, so that the flow additional liquid air sent to column 9 is significantly more greater than the additional oxygen flow that is drawn from it. he the higher the pressure of the liquid air is.
- the quantity of cold gases produced by the double column and sent in the heat exchange line increases, thereby compensating for the reduction in the amount of cold sent to the latter due to the decrease in demand for gaseous oxygen and, consequently, in flow of oxygen vaporized in the passages 18, this drop being obtained in reducing the speed of the pump 12.
- valve 17 closes, and the pump speed 12.
- the liquid level drops in the reservoir11 and increases in reservoir 13.
- this air is taken at the outlet of the apparatus 2 via a line 38, cooled and liquefied in passages additional 21A from the exchange line, and sent as previously to container 13 via line 22.
- the liquefaction passages 21 of the air under high pressure are equipped, at the cold end of the exchange line, with a trigger 25A, and the sub-cooling passages of the withdrawn liquid air of the container 13 are equipped, at the same cold end, with the valve trigger 25.
- valves 25 and 25A which ensures the functioning of the air / oxygen switch, similar to which has been described above with regard to FIG. 1.
- the optimum pressure range from the point of view of the thermal equilibrium of the exchange line 6 and that of the distillation conditions, is between 30 ⁇ 10 5 Pa and approximately 35 ⁇ 10 5 Pa.
- the invention also applies to the case where the liquid withdrawn is nitrogen, argon, or another liquid.
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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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
- lors d'une augmentation de la demande du gaz sous pression par rapport au débit nominal, on soutire l'excès demandé, sous forme liquide, du récipient de stockage du liquide soutiré, on l'amène à la pression de vaporisation, et on le vaporise sous cette pression dans la ligne d'échange thermique, et on stocke une quantité correspondante d'air liquéfié par ladite vaporisation dans un récipient de stockage d'air liquide, sous une pression de stockage au moins égale à la pression de fonctionnement de la colonne moyenne pression.
- le palier de stockage d'air liquide est à une pression voisine de la pression à laquelle s'effectue ladite liquéfaction d'air ;
- le récipient de stockage d'air liquide est à une pression comprise entre 30 x 105 Pa et 35 x 105 Pa environ ;
- la totalité du liquide vaporisé est soutirée du récipient de stockage de liquide ;
- on effectue ladite liquéfaction d'air à une température inférieure à la température de vaporisation du liquide sous ladite pression de vaporisation, et on évacue au moins un produit liquide de l'installation ; et
- on comprime l'air destiné au récipient de stockage d'air liquide à ladite pression de stockage et le reste de l'air à une haute pression supérieure à cette pression de stockage.
- le récipient de stockage d'air liquide est relié auxdits passages de liquéfaction d'air par l'intermédiaire d'une vanne de détente ;
- les moyens de compression comprennent un compresseur d'air principal suivi d'une soufflante adaptée pour surpresser une fraction de l'air non destinée au récipient de stockage d'air liquide.
- la figure 1 représente schématiquement une installation de production d'oxygène gazeux sous pression à débit variable conforme à l'invention ; et
- la figure 2 est une vue analogue d'une variante.
Claims (15)
- Procédé de production d'un gaz sous pression à débit variable, du type dans lequel on distille de l'air dans une installation de distillation d'air comprenant un appareil de distillation (7) comprenant une colonne moyenne pression (8) et une colonne basse pression (9) opérant à une basse pression et une ligne d'échange thermique (6) pour refroidir l'air par échange de chaleur avec des produits provenant de l'appareil de distillation; on soutire du liquide de cet appareil, on le stocke dans un récipient (11) sous une pression voisine de la pression atmosphérique et égale à la basse pression, on amène le liquide stocké à une pression de vaporisation, on le vaporise et on le réchauffe sous cette pression dans la ligne d'échange thermique pour former le gaz sous pression, cette vaporisation et ce réchauffement s'accompagnant d'une liquéfaction d'air dans ses passages de liquéfaction d'air de la ligne d'échange thermique; et dans lequel :lors d'une augmentation de la demande du gaz sous pression par rapport au débit nominal, on soutire l'excès demandé, sous forme liquide, du récipient de stockage du liquide soutiré (11), on l'amène (en 12) à la pression de vaporisation, et on le vaporise sous cette pression (en 18) dans la ligne d'échange thermique (6), et on stocke une quantité correspondante d'air liquéfié par ladite vaporisation dans un récipient de stockage d'air liquide (13), sous une pression de stockage au, moins égale à la pression de fonctionnement de la colonne moyenne pression.
- Procédé selon la revendication 1, caractérisé en ce que le récipient de stockage d'air liquide (13) est à une pression voisine de la pression à laquelle s'effectue ladite liquéfaction d'air.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que le récipient de stockage d'air liquide (13) est à une pression comprise entre 30 x 105 Pa et 35 x 105 Pa environ.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la totalité du liquide vaporisé est soutirée du récipient de stockage de liquide (11).
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on effectue ladite liquéfaction d'air à une température inférieure à la température de vaporisation du liquide soutiré sous ladite pression de vaporisation, et on évacue au moins un produit liquide de l'installation.
- Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'on comprime (en 1) l'air (38) destiné au récipient (13) de stockage d'air liquide à ladite pression de stockage et le reste de l'air à une haute pression supérieure à cette pression de stockage.
- Procédé selon l'une des revendications 1 à 6 dans lequel on envoie tout l'air destiné à l'appareil de distillation (7) à la ligne d'échange thermique (6) où il se refroidit.
- Procédé selon l'une des revendications 1 à 7, dans lequel on varie la quantité de liquide envoyé à la ligne d'échange thermique en variant la vitesse d'une pompe (12) qui sert à amener le liquide à la pression de vaporisation.
- Procédé selon l'une des revendications 1 à 8 dans lequel un compresseur (1) sert à comprimer l'air destiné à l'appareil et lorsque la demande en gaz sous pression varie, on maintient constant le débit d'air comprimé par le compresseur.
- Procédé selon l'une des revendications 1 à 9 dans lequel on envoie la quantité additionnelle correspondante d'air liquide à la colonne basse pression.
- Installation de production d'un gaz sous pression à débit variable, du type comprenant un appareil de distillation d'air (7) comprenant une colonne moyenne pression (8) et une colonne basse pression (9), une ligne d'échange thermique (6) pour refroidir l'air par échange de chaleur avec des produits provenant de l'appareil de distillation, des moyens (16, 17) pour soutirer du liquide de cet appareil; des moyens (1, 5) pour amener au moins une fraction de l'air à distiller à une haute pression, et l'envoyer dans des passages (21; 21,21A) de liquéfaction d'air de la ligne d'échange thermique, un récipient (11) de stockage de liquide sous une pression voisine de la pression atmosphérique relié à l'appareil de distillation (7) et muni de moyens (12) pour soutirer du liquide à débit réglable, l'amener à la pression de vaporisation et l'envoyer dans des passages (18) de vaporisation de la ligne d'échange thermique, et un récipient (13) de stockage d'air liquide relié en amont aux passages (21; 21A) de liquéfaction d'air de la ligne d'échange thermique et, en aval, via des moyens de détente (25), à l'appareil de distillation,
caractérisée en ce que le récipient (13) de stockage d'air liquide se trouve sous une pression nettement supérieure à la plus forte pression de fonctionnement de l'appareil de distillation (7), les moyens de détente sont à débit réglable et en ce qu'elle comprend des moyens (30, 31) pour envoyer des gaz riches en azote de la colonne basse pression (9) à la ligne d'échange thermique. - Installation selon la revendication 11, caractérisée en ce que le récipient (11) de stockage du liquide est interposé entre l'appareil de distillation d'air (7) et des moyens (12) pour amener à la pression de vaporisation la totalité du liquide à vaporiser.
- Installation selon l'une des revendications 11 ou 12, caractérisée en ce que le récipient de stockage d'air liquide (13) est relié auxdits passages de liquéfaction d'air (21 ; 21A) par l'intermédiaire d'une vanne de détente (37).
- Installation selon l'une quelconque des revendications 11 à 13, caractérisée en ce que les moyens de compression (1, 5) comprennent un compresseur d'air principal (1) suivi d'une soufflante (5) adaptée pour surpresser une fraction de l'air non destinée au récipient (13) de stockage d'air liquide.
- Installation selon l'une des revendications 11 à 14 comprenant des moyens (1, 5) pour envoyer tout l'air destiné à la distillation à la ligne d'échange thermique (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR9409481 | 1994-07-29 | ||
FR9409481A FR2723184B1 (fr) | 1994-07-29 | 1994-07-29 | Procede et installation de production d'oxygene gazeux sous pression a debit variable |
Publications (2)
Publication Number | Publication Date |
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EP0694746A1 EP0694746A1 (fr) | 1996-01-31 |
EP0694746B1 true EP0694746B1 (fr) | 2000-04-19 |
Family
ID=9465927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95401774A Expired - Lifetime EP0694746B1 (fr) | 1994-07-29 | 1995-07-26 | Procédé de production d'un gaz sous pression à débit variable |
Country Status (10)
Country | Link |
---|---|
US (1) | US5526647A (fr) |
EP (1) | EP0694746B1 (fr) |
JP (1) | JPH08170875A (fr) |
KR (1) | KR100394311B1 (fr) |
CN (1) | CN1119607C (fr) |
CA (1) | CA2154984A1 (fr) |
DE (1) | DE69516339T2 (fr) |
ES (1) | ES2145885T3 (fr) |
FR (1) | FR2723184B1 (fr) |
ZA (1) | ZA956332B (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2730172B1 (fr) * | 1995-02-07 | 1997-03-21 | Air Liquide | Methode et appareil de surveillance de fonctionnement d'une installation de separation d'air |
DE19526785C1 (de) * | 1995-07-21 | 1997-02-20 | Linde Ag | Verfahren und Vorrichtung zur variablen Erzeugung eines gasförmigen Druckprodukts |
FR2751737B1 (fr) * | 1996-07-25 | 1998-09-11 | Air Liquide | Procede et installation de production d'un gaz de l'air a debit variable |
DE19732887A1 (de) * | 1997-07-30 | 1999-02-04 | Linde Ag | Verfahren zur Luftzerlegung |
CA2319552C (fr) * | 1998-02-04 | 2004-04-20 | Texaco Development Corporation | Separation d'air cryogenique combinee avec une gazeification integree |
US6182471B1 (en) * | 1999-06-28 | 2001-02-06 | Praxair Technology, Inc. | Cryogenic rectification system for producing oxygen product at a non-constant rate |
US6233970B1 (en) | 1999-11-09 | 2001-05-22 | Air Products And Chemicals, Inc. | Process for delivery of oxygen at a variable rate |
US6357259B1 (en) * | 2000-09-29 | 2002-03-19 | The Boc Group, Inc. | Air separation method to produce gaseous product |
SE520267C3 (sv) * | 2000-10-04 | 2003-08-13 | Volvo Teknisk Utveckling Ab | Värmeenergiåtervinningsanordning |
EP1318368A1 (fr) * | 2001-12-10 | 2003-06-11 | The Boc Group, Inc. | Méthode de séparation d'air pour la production d'un produit gazeux à débit variable |
GB0219415D0 (en) * | 2002-08-20 | 2002-09-25 | Air Prod & Chem | Process and apparatus for cryogenic separation process |
FR2872262B1 (fr) * | 2004-06-29 | 2010-11-26 | Air Liquide | Procede et installation de fourniture de secours d'un gaz sous pression |
US7272954B2 (en) * | 2004-07-14 | 2007-09-25 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Proceded Georges Claude | Low temperature air separation process for producing pressurized gaseous product |
FR2910604B1 (fr) * | 2006-12-22 | 2012-10-26 | Air Liquide | Procede et appareil de separation d'un melange gazeux par distillation cryogenique |
CN103080678B (zh) * | 2010-09-09 | 2015-08-12 | 乔治洛德方法研究和开发液化空气有限公司 | 用于通过低温蒸馏分离空气的方法和装置 |
JP6464399B2 (ja) * | 2014-10-03 | 2019-02-06 | 神鋼エア・ウォーター・クライオプラント株式会社 | 空気分離装置 |
CN105300031B (zh) * | 2015-11-11 | 2017-07-11 | 巴彦淖尔市飞尚铜业有限公司 | 一种快速出氧的启动方法 |
CN110411060B (zh) * | 2019-07-24 | 2021-06-15 | 上海交通大学 | 一种液氮减压低温冷却系统 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1166565A (fr) * | 1956-01-04 | 1958-11-13 | Union Carbide & Carbon Corp | Procédé et installation de séparation par rectification de mélanges gazeux |
NL108862C (fr) | 1956-09-25 | 1900-01-01 | ||
US3174293A (en) * | 1960-11-14 | 1965-03-23 | Linde Eismasch Ag | System for providing gas separation products at varying rates |
DE2557453C2 (de) * | 1975-12-19 | 1982-08-12 | Linde Ag, 6200 Wiesbaden | Verfahren zur Gewinnung von gasförmigem Sauerstoff |
GB2125949B (en) * | 1982-08-24 | 1985-09-11 | Air Prod & Chem | Plant for producing gaseous oxygen |
DE3663997D1 (en) * | 1985-08-23 | 1989-07-20 | Daido Oxygen | Oxygen gas production unit |
AT383884B (de) * | 1985-10-24 | 1987-09-10 | Messer Griesheim Austria Ges M | Verfahren zur rueckgewinnung von bei der luftzerlegung nach verfluessigung aufgewendeter verfluessigungsenergie |
GB8820582D0 (en) * | 1988-08-31 | 1988-09-28 | Boc Group Plc | Air separation |
DE3913880A1 (de) * | 1989-04-27 | 1990-10-31 | Linde Ag | Verfahren und vorrichtung zur tieftemperaturzerlegung von luft |
JPH02293575A (ja) * | 1989-05-08 | 1990-12-04 | Kobe Steel Ltd | 空気分離装置 |
FR2652887B1 (fr) * | 1989-10-09 | 1993-12-24 | Air Liquide | Procede et installation de production d'oxygene gazeux a debit variable par distillation d'air. |
FR2674011B1 (fr) | 1991-03-11 | 1996-12-20 | Maurice Grenier | Procede et installation de production d'oxygene gazeux sous pression. |
JP2909678B2 (ja) * | 1991-03-11 | 1999-06-23 | レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | 圧力下のガス状酸素の製造方法及び製造装置 |
FR2685460B1 (fr) * | 1991-12-20 | 1997-01-31 | Maurice Grenier | Procede et installation de production d'oxygene gazeux sous pression par distillation d'air |
JPH0611254A (ja) * | 1991-11-07 | 1994-01-21 | Tokyo Reinetsu Sangyo Kk | Lng冷熱を利用した空気の液化・分離方法及びその装置 |
CN1071444C (zh) * | 1992-02-21 | 2001-09-19 | 普拉塞尔技术有限公司 | 生产气体氧的低温空气分离系统 |
FR2688052B1 (fr) | 1992-03-02 | 1994-05-20 | Maurice Grenier | Procede et installation de production d'oxygene et/ou d'azote gazeux sous pression par distillation d'air. |
FR2692664A1 (fr) | 1992-06-23 | 1993-12-24 | Lair Liquide | Procédé et installation de production d'oxygène gazeux sous pression. |
FR2699992B1 (fr) * | 1992-12-30 | 1995-02-10 | Air Liquide | Procédé et installation de production d'oxygène gazeux sous pression. |
-
1994
- 1994-07-29 FR FR9409481A patent/FR2723184B1/fr not_active Expired - Fee Related
-
1995
- 1995-04-19 US US08/424,633 patent/US5526647A/en not_active Expired - Lifetime
- 1995-07-26 EP EP95401774A patent/EP0694746B1/fr not_active Expired - Lifetime
- 1995-07-26 DE DE69516339T patent/DE69516339T2/de not_active Expired - Fee Related
- 1995-07-26 ES ES95401774T patent/ES2145885T3/es not_active Expired - Lifetime
- 1995-07-28 ZA ZA956332A patent/ZA956332B/xx unknown
- 1995-07-28 CA CA002154984A patent/CA2154984A1/fr not_active Abandoned
- 1995-07-28 JP JP7193915A patent/JPH08170875A/ja active Pending
- 1995-07-28 CN CN95115263A patent/CN1119607C/zh not_active Expired - Fee Related
- 1995-07-28 KR KR1019950022829A patent/KR100394311B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0694746A1 (fr) | 1996-01-31 |
US5526647A (en) | 1996-06-18 |
CA2154984A1 (fr) | 1996-01-30 |
JPH08170875A (ja) | 1996-07-02 |
FR2723184B1 (fr) | 1996-09-06 |
DE69516339T2 (de) | 2000-09-21 |
ZA956332B (en) | 1996-03-11 |
ES2145885T3 (es) | 2000-07-16 |
CN1154463A (zh) | 1997-07-16 |
CN1119607C (zh) | 2003-08-27 |
DE69516339D1 (de) | 2000-05-25 |
KR100394311B1 (ko) | 2003-10-22 |
KR960003774A (ko) | 1996-02-23 |
FR2723184A1 (fr) | 1996-02-02 |
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