EP0914584B1 - Procede et installation de production d'un gaz de l'air a debit variable - Google Patents
Procede et installation de production d'un gaz de l'air a debit variable Download PDFInfo
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- EP0914584B1 EP0914584B1 EP97935636A EP97935636A EP0914584B1 EP 0914584 B1 EP0914584 B1 EP 0914584B1 EP 97935636 A EP97935636 A EP 97935636A EP 97935636 A EP97935636 A EP 97935636A EP 0914584 B1 EP0914584 B1 EP 0914584B1
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- Prior art keywords
- flow
- liquid
- auxiliary
- gas
- pressure
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- 238000000034 method Methods 0.000 title claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 15
- 238000004821 distillation Methods 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 230000008016 vaporization Effects 0.000 claims description 9
- 238000009834 vaporization Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000872 buffer Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 229910001882 dioxygen Inorganic materials 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 21
- 238000009434 installation Methods 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012464 large buffer Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F25J3/04472—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
- F25J3/04515—Simultaneously changing air feed and products output
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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
- F25J3/04248—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
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low 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
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04812—Different modes, i.e. "runs" of operation
- F25J3/04836—Variable air feed, i.e. "load" or product demand during specified periods, e.g. during periods with high respectively low power costs
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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
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/50—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being 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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
- F25J2240/46—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval the fluid being 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
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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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/62—Details of storing a fluid in a tank
Definitions
- the present invention relates to a method for producing an air gas, in particular oxygen, at variable flow by air distillation, of the type described in the preamble of claim 1.
- the invention applies in particular to the production of oxygen under pressure with variable flow.
- the pressures discussed here are absolute pressures, and flow rates are flow rates molars.
- EP-A-0 422 974 in the name of the Applicant describes a process of this type, called a "rocking process", intended for the production of gaseous oxygen with variable flow.
- the second fluid in question is air to be distilled, which is condensed at a variable rate.
- the compressor, and possibly the booster are significantly oversized compared to the flow nominal oxygen to be produced.
- they work for the majority of the time at high flows reduced compared to their capacities, and therefore with a degraded yield.
- the invention aims to allow the production of air gas with variable flow in particularly effective and economical conditions.
- This process can include one or more of Features of claims 2 to 11.
- the subject of the invention is also a installation intended for the implementation of such process. This installation is described in the claim 12.
- This installation may include one or more several of the features of claims 13 to 16.
- the installation shown in Figure 1 basically includes a main air compressor 1 with variable flow, for example of the centrifugal type with blades mobile, an adsorption purification device 2, a heat exchange line 3, a turbine 4 for maintaining cold, an air distillation apparatus 5 consisting of a double column including itself a column medium pressure 6 surmounted by a low pressure column 7 and a vaporizer-condenser 8, a reservoir liquid oxygen 10, a liquefied air tank 11, two pumps 12 and 13, an air booster 14 and a capacity auxiliary or "buffer" 15.
- This installation is intended to produce a variable flow of gaseous oxygen via a production line 16, at a pressure of around 15 bars.
- a first flow is cooled in passages 19 of exchange line 3; some came out of this exchange line after partial cooling, expanded to around 1 bar in turbine 4 and blown into the low pressure column 7 near its point of dew via line 20; the rest continues cooling to the vicinity of its dew point under 6 bars, then is injected at the bottom of the middle column pressure 6 via line 21.
- a second flow is boosted at 14 to a high condensing pressure defined below, then is cooled and liquefied in passages 22 of the line then stored in liquid form in the tank 11 after expansion to 6 bars in a valve trigger 23.
- a constant flow of liquefied air is drawn off from the bottom of this tank and is divided into a first flow constant at 6 bars sent in the middle column pressure via line 24, and in a second flow constant relaxed towards 1 bar in an expansion valve 25 then injected into the low pressure column 7.
- the vaporizer-condenser 8 vaporizes a flow liquid oxygen constant in bottom column tank pressure 7 by condensation of an approximately equal flow nitrogen at the top of the medium pressure column 6.
- Du "rich liquid” (oxygen-enriched air) taken from tank of the medium pressure column and relaxed to 1 bar in an expansion valve 26 is injected at a level intermediate of the low pressure column, and of the “liquid poor "(almost pure nitrogen), taken at the head of the medium pressure column and relaxed to 1 bar in one expansion valve 27, is injected at the top of the column low pressure.
- Capacity 15 is connected to the conduct of production 16 via a line 33 fitted with a valve trigger and flow control 34, and a constant flow equal to that of the aforementioned second stream is relaxed in this valve 34 and sent from capacity 15 to line 16.
- the installation includes a single blower 14, so that the condensation of pressurized air is used, in passages 22 of the exchange line, to vaporize both the oxygen under 15 bars and oxygen under 30 bars.
- the pressure of the supercharged air is chosen as being the pressure known as "concomitant" with the vaporization of oxygen under 15 bars.
- This pressure is that for which the knee G of air liquefaction is close to the stage P of vaporization of oxygen under 15 bars, as shown in FIG. 2, on which the quantities of heat exchanged Q are plotted on the ordinate and temperatures t on the abscissa.
- point A represents the inlet temperature of turbine 4, and this inlet temperature is chosen so as to obtain a minimum temperature difference, of the order of a few degrees, at the warm end of the exchange line.
- oxygen is produced under 1 bar approximately, and the oxygen demand is still greater than a given minimum value.
- a flow constant gaseous oxygen equal to this minimum value can then be drawn directly from the bottom of the column low pressure 7 via a pipe 35, as indicated in dashed line in Figure 1, then reheated in the line exchange.
- This variant reduces the capacity tanks 10 and 11.
- production constants of liquid oxygen and / or nitrogen gas and / or liquid nitrogen can be supplied simultaneously by the double column, via lines 36 and / or 37 and / or 38, also as shown in phantom in Figure 1.
- the pump 13 is deleted.
- the auxiliary oxygen flow is withdrawn in gaseous form from the tank of column 7, via a pipe 39, is heated at 30 below the low pressure and then is compressed at high pressure by a auxiliary compressor 40 before being introduced into the capacity 15.
- the vaporizing fluid at least one of the two oxygen flow rates is nitrogen.
- the main flow is sprayed using the vaporizer 8 of the double column. This main flow is then withdrawn in gaseous form from the column tank 7, via a pipe 41, and heated at 29.
- the discharge pump 12 is then connected to the column tank, which feeds the tank 10 by gravity.
- line 38 is connected to a nitrogen tank 42, and the bottom of this tank is connected to a pump 43 for returning a constant flow of nitrogen liquid at the top of column 6.
- the rocker is, in this variant, a rocker oxygen / nitrogen, and the reservoir 11, at constant level, can be deleted.
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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)
- Respiratory Apparatuses And Protective Means (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
- la Figure 1 représente schématiquement une installation de production d'oxygène sous pression à débit variable conforme à l'invention ;
- la Figure 2 est un diagramme d'échange thermique illustrant la vaporisation de l'oxygène liquide sous la pression de production ; et
- les Figures 3 et 4 représentent schématiquement deux variantes de l'installation.
- Un premier flux majoritaire, représentant par exemple 80 % du débit total, est comprimé à 15 bars par la pompe 12, puis vaporisé dans des passages 29 de la ligne d'échange et fourni à la conduite 16 de production.
- Un second flux est comprimé par la pompe 13 à une pression très supérieure, par exemple 30 bars, vaporisé dans des passages 30 de la ligne d'échange et fourni à la capacité 15.
Claims (16)
- Procédé de production d'un gaz de l'air, notamment d'oxygène, à débit variable par distillation d'air, du type dans lequel on stocke une partie au moins du gaz à produire, sous forme d'un premier liquide, dans un premier réservoir (10); on soutire de ce réservoir un débit variable dudit premier liquide, et on l'amène (en 12, 29; 12, 8, 29) sous forme gazeuse et à la pression de production, ce débit variable étant vaporisé (en 29; 8) en condensant un débit variable correspondant d'un second fluide, notamment d'air à distiller; on stocke ce second fluide condensé, sous forme d'un second liquide, dans un second réservoir (11); et on envoie un débit commandé de ce second liquide à l'appareil de distillation, caractérisé en ce qu'on amène un débit auxiliaire du gaz à produire sous forme gazeuse et à une haute pression supérieure à la pression de production, puis on le stocke dans une capacité auxiliaire (15) sous ladite haute pression, et, lors de certaines pointes de consommation dudit gaz, on prélève une partie au moins du gaz excédentaire dans cette capacité auxiliaire, après l'avoir détendu (en 34) à la pression de production.
- Procédé suivant la revendication 1, caractérisé en ce qu'on comprime (en 13) ledit débit auxiliaire, sous forme liquide, à ladite haute pression, et on vaporise sous cette haute pression le débit auxiliaire comprimé, avant de l'introduire dans la capacité auxiliaire (15).
- Procédé suivant la revendication 2, caractérisé en ce qu'on vaporise ledit débit auxiliaire comprimé par échange de chaleur avec ledit second fluide.
- Procédé suivant la revendication 3, caractérisé en ce qu'on vaporise ledit débit variable et ledit débit auxiliaire par échange de chaleur avec ledit second fluide sous une pression de condensation unique.
- Procédé suivant la revendication 3 ou 4, caractérisé en ce que ladite pression de condensation unique est telle que la température de condensation du second fluide est inférieure à la température de vaporisation dudit gaz, au moins sous ladite haute pression.
- Procédé suivant la revendication 5, caractérisé en ce que la température de condensation dudit second fluide sous ladite pression de condensation est concomitante à la température de vaporisation dudit gaz sous la pression de production.
- Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'on soutire un débit constant dudit premier liquide de l'appareil de distillation (5), et en ce qu'on fait passer un débit constant dudit second liquide du second réservoir (11) à l'appareil de distillation.
- Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le débit auxiliaire représente une fraction minoritaire du débit dudit premier liquide, notamment environ 25% de ce dernier en marche nominale.
- Procédé suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit débit auxiliaire est constant.
- Procédé suivant l'une quelconque des revendications 1 à 9, caractérisé en ce que lesdites pointes de consommation sont des pointes d'amplitude supérieure à une valeur prédéterminée.
- Procédé suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que, jusqu'à un débit excédentaire prédéterminé dudit gaz, ce débit excédentaire est fourni par augmentation dudit débit variable.
- Installation de production d'un gaz de l'air, notamment d'oxygène, à débit variable, du type comprenant : un appareil de distillation d'air (5); une ligne d'échange thermique (3) pour refroidir l'air à distiller par échange de chaleur avec des produits provenant de l'appareil de distillation; un premier réservoir (10) de stockage dudit gaz sous forme d'un premier liquide; des premiers moyens (12, 29; 12, 8, 29) pour soutirer du premier réservoir un débit variable dudit premier liquide et l'amener sous forme gazeuse et à la pression de production, ces premiers moyens comprenant des seconds moyens (29; 8) pour vaporiser ledit débit variable en condensant un débit variable correspondant d'un second fluide, notamment d'air à distiller, sous forme d'un second liquide; et un second réservoir (11) de stockage du second liquide, caractérisée en ce qu'elle comprend des troisièmes moyens (13, 30) pour amener un débit auxiliaire du gaz à produire sous forme gazeuse et à une haute pression supérieure à la pression de production, puis l'introduire dans une capacité auxiliaire (15), et une conduite (33) munie d'une vanne de détente et de réglage de débit (34) et reliant cette capacité auxiliaire à la conduite de production (16) de l'installation.
- Installation suivant la revendication 12, caractérisé en ce que lesdits troisièmes moyens (13, 30) comprennent une pompe (13) pour comprimer ledit débit auxiliaire sous forme liquide, et des moyens (30) pour vaporiser ce débit auxiliaire comprimé.
- Installation suivant la revendication 13, caractérisée en ce que ladite pompe (13) est reliée audit premier réservoir (10).
- Installation suivant la revendication 13 ou 14, caractérisée en ce qu'elle comprend un surpresseur unique (14) amenant ledit second fluide à une pression unique de condensation par échange de chaleur avec ledit débit variable et avec ledit débit auxiliaire.
- Installation suivant l'une quelconque des revendications 12 à 15, caractérisée en ce qu'elle comprend des moyens de soutirage (28) adaptés pour soutirer un débit constant dudit premier liquide de l'appareil de distillation (5), et des moyens pour faire passer un débit constant dudit second liquide du second réservoir (11) à l'appareil de distillation.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9609376A FR2751737B1 (fr) | 1996-07-25 | 1996-07-25 | Procede et installation de production d'un gaz de l'air a debit variable |
FR9609376 | 1996-07-25 | ||
PCT/FR1997/001401 WO1998004877A1 (fr) | 1996-07-25 | 1997-07-25 | Procede et installation de production d'un gaz de l'air a debit variable |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0914584A1 EP0914584A1 (fr) | 1999-05-12 |
EP0914584B1 true EP0914584B1 (fr) | 2002-05-02 |
Family
ID=9494477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97935636A Expired - Lifetime EP0914584B1 (fr) | 1996-07-25 | 1997-07-25 | Procede et installation de production d'un gaz de l'air a debit variable |
Country Status (15)
Country | Link |
---|---|
US (1) | US6062044A (fr) |
EP (1) | EP0914584B1 (fr) |
JP (1) | JP2000515236A (fr) |
KR (1) | KR100488029B1 (fr) |
CN (1) | CN1145004C (fr) |
AR (1) | AR013064A1 (fr) |
AT (1) | ATE217071T1 (fr) |
BR (1) | BR9710525A (fr) |
CA (1) | CA2261097A1 (fr) |
DE (1) | DE69712340T2 (fr) |
ES (1) | ES2175446T3 (fr) |
FR (1) | FR2751737B1 (fr) |
PL (1) | PL331280A1 (fr) |
WO (1) | WO1998004877A1 (fr) |
ZA (2) | ZA976197B (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6182471B1 (en) * | 1999-06-28 | 2001-02-06 | Praxair Technology, Inc. | Cryogenic rectification system for producing oxygen product at a non-constant rate |
US6354105B1 (en) * | 1999-12-03 | 2002-03-12 | Ipsi L.L.C. | Split feed compression process for high recovery of ethane and heavier components |
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 |
US7228715B2 (en) * | 2003-12-23 | 2007-06-12 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic air separation process and apparatus |
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 |
US7553419B2 (en) * | 2006-05-03 | 2009-06-30 | Organix, Inc. | Method of material processing to produce a fiber product |
FR2949845B1 (fr) * | 2009-09-09 | 2011-12-02 | Air Liquide | Procede d'operation d'au moins un appareil de separation d'air et d'une unite de combustion de combustibles carbones |
US9581386B2 (en) * | 2010-07-05 | 2017-02-28 | L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Products Georges Claude | Apparatus and process for separating air by cryogenic distillation |
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 |
US10359231B2 (en) * | 2017-04-12 | 2019-07-23 | Praxair Technology, Inc. | Method for controlling production of high pressure gaseous oxygen in an air separation unit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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. |
FR2670278B1 (fr) * | 1990-12-06 | 1993-01-22 | Air Liquide | Procede et installation de distillation d'air en regime variable de production d'oxygene gazeux. |
FR2723184B1 (fr) * | 1994-07-29 | 1996-09-06 | Grenier Maurice | Procede et installation de production d'oxygene gazeux sous pression a debit variable |
FR2757282B1 (fr) * | 1996-12-12 | 2006-06-23 | Air Liquide | Procede et installation de fourniture d'un debit variable d'un gaz de l'air |
-
1996
- 1996-07-25 FR FR9609376A patent/FR2751737B1/fr not_active Expired - Fee Related
-
1997
- 1997-07-11 ZA ZA976197A patent/ZA976197B/xx unknown
- 1997-07-24 ZA ZA976620A patent/ZA976620B/xx unknown
- 1997-07-25 CA CA002261097A patent/CA2261097A1/fr not_active Abandoned
- 1997-07-25 PL PL97331280A patent/PL331280A1/xx unknown
- 1997-07-25 DE DE69712340T patent/DE69712340T2/de not_active Expired - Fee Related
- 1997-07-25 AR ARP970103384A patent/AR013064A1/es unknown
- 1997-07-25 EP EP97935636A patent/EP0914584B1/fr not_active Expired - Lifetime
- 1997-07-25 ES ES97935636T patent/ES2175446T3/es not_active Expired - Lifetime
- 1997-07-25 KR KR10-1999-7000375A patent/KR100488029B1/ko not_active IP Right Cessation
- 1997-07-25 WO PCT/FR1997/001401 patent/WO1998004877A1/fr active IP Right Grant
- 1997-07-25 AT AT97935636T patent/ATE217071T1/de not_active IP Right Cessation
- 1997-07-25 US US09/230,332 patent/US6062044A/en not_active Expired - Fee Related
- 1997-07-25 CN CNB971967423A patent/CN1145004C/zh not_active Expired - Fee Related
- 1997-07-25 JP JP10508563A patent/JP2000515236A/ja active Pending
- 1997-07-25 BR BR9710525A patent/BR9710525A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0914584A1 (fr) | 1999-05-12 |
ES2175446T3 (es) | 2002-11-16 |
CN1226312A (zh) | 1999-08-18 |
US6062044A (en) | 2000-05-16 |
KR100488029B1 (ko) | 2005-05-09 |
KR20000023846A (ko) | 2000-04-25 |
CN1145004C (zh) | 2004-04-07 |
FR2751737A1 (fr) | 1998-01-30 |
DE69712340D1 (de) | 2002-06-06 |
FR2751737B1 (fr) | 1998-09-11 |
ZA976620B (en) | 1999-01-25 |
JP2000515236A (ja) | 2000-11-14 |
WO1998004877A1 (fr) | 1998-02-05 |
ZA976197B (en) | 1999-02-17 |
PL331280A1 (en) | 1999-07-05 |
BR9710525A (pt) | 1999-08-17 |
AR013064A1 (es) | 2000-12-13 |
ATE217071T1 (de) | 2002-05-15 |
CA2261097A1 (fr) | 1998-02-05 |
DE69712340T2 (de) | 2002-11-14 |
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