EP0556753B1 - Process for the production of a gas mixture - Google Patents

Process for the production of a gas mixture Download PDF

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Publication number
EP0556753B1
EP0556753B1 EP93102283A EP93102283A EP0556753B1 EP 0556753 B1 EP0556753 B1 EP 0556753B1 EP 93102283 A EP93102283 A EP 93102283A EP 93102283 A EP93102283 A EP 93102283A EP 0556753 B1 EP0556753 B1 EP 0556753B1
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EP
European Patent Office
Prior art keywords
component
gas
gas mixture
pressure
compressed
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Expired - Lifetime
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EP93102283A
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German (de)
French (fr)
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EP0556753A1 (en
Inventor
Werner Hermeling
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Messer Griesheim GmbH
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Messer Griesheim GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/12—Mixing gases with gases with vaporisation of a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B01F23/191—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means characterised by the construction of the controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2111—Flow rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/014—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling

Definitions

  • the present invention relates to a method for producing a gas mixture in a compressed gas container, with at least one component that can be liquefied at ambient temperature and at a pressure below the pressure gas container pressure and with at least one component that is not liquefiable at this pressure and temperature.
  • a pre-gas mixture of a liquefiable component (preferably CO2) and a non-liquefiable component (preferably argon) is first formed with an injector 10, with a mixture proportion CO2 which is greater than the proportion of CO2 in the finished gas mixture.
  • the injector 10 is supplied with gaseous argon at high pressure (p ⁇ 180-220 bar at ambient temperature) from an argon storage container 11 with the interposition of a flow meter 12 with a measuring orifice 12a and a shut-off valve 13 via line 14.
  • gaseous CO2 is removed and sucked in at a low pressure (p ⁇ 40 bar) and the gaseous argon with the gaseous CO2 in a turbulent flow intensely mixed.
  • the pre-gas mixture thus generated flows into one or more compressed gas containers (compressed gas cylinders) 20 provided in parallel, until a quantity of CO2 in the Compressed gas containers 20 is reached, which corresponds to the amount of CO2 that must be contained in the desired gas mixture.
  • the CO2 supply is interrupted and filled via line 14 and the injector 10 or a parallel to the injector 10 secondary line 21 as long as argon in the compressed gas bottles 20 until an amount of argon is reached, which must be in the desired gas mixture.
  • the desired gas mixture composition is determined, for example, by the pressure and temperature compensated flow meters 12 and 15, the output values of which are automatically recorded and, for example, close the shut-off valves 13 and 16 accordingly.
  • the gas mixture composition is determined gravimetrically by one of the bottles (reference bottle) standing on a scale 23.
  • the amount of CO2 is determined by a pressure and temperature compensated flow measurement.
  • the proportion of argon in the mixture is calculated by subtracting the amount of CO2 from the mixture.
  • the mixture production is controlled via a computer and assigned valves etc.
  • the max. permissible filling pressure is constantly monitored, so that this variant is a manometric filling and gravimetric mixing process.
  • the method described above and characterized in the claims is not only for the production of argon / CO2 mixed gases (eg for welding and cutting purposes) with a CO2 content between 2.5 and 20% also for the production of other gas mixtures such as N2 / CO2 Mixtures with up to 30% CO2 content.
  • pre-gas mixture directly to one or more gas bottle (s), but to store it temporarily in a container.
  • the storage container which can also be made portable, can then be used at any location, e.g. the final gas mixture is made at the customer's site.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention relates to a process for the production of a gas mixture in a pressurised gas vessel, with at least one component which can be liquefied at ambient temperature and at a pressure below the pressurised gas vessel pressure, and with at least one component which cannot be liquefied at this pressure and this temperature, which process is characterised in that an initial gas mixture with the liquefiable component is first formed by means of an injector, with a content of the liquefiable component of the mixture which is greater than the proportion of the liquefiable component in the finished gas mixture, in that the initial gas mixture is then introduced into the pressurised gas vessel and in that subsequently the non-liquefiable component is introduced into the pressurised gas vessel until the desired gas mixture composition has been reached. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Gasgemisches in einem Druckgasbehälter, mit mindestens einer bei Umgebungstemperatur und bei einem unterhalb des Druckgasbehälterdruckes liegenden Druck verflüssigbaren Komponente und mit mindestens einer bei diesem Druck und dieser Temperatur nicht verflüssigbaren Komponente.The present invention relates to a method for producing a gas mixture in a compressed gas container, with at least one component that can be liquefied at ambient temperature and at a pressure below the pressure gas container pressure and with at least one component that is not liquefiable at this pressure and temperature.

Die dadurch gekennzeichneten Einzelkomponenten des gewünschten Gasgemisches unterscheiden sich somit erheblich bezüglich der Siedetemperatur und sind daher mit steigendem Partialdruck der Einzelkomponenten nach den bisher bekanntgewordenen Verfahren, wie sie beispielsweise in dem von MESSER GRIESHEIM herausgegebenen GASEHANDBUCH, 3. Auflage, 1989, Seiten 24 - 28 beschrieben sind, schwer mischbar.The individual components of the desired gas mixture characterized thereby differ considerably with regard to the boiling temperature and are therefore, with increasing partial pressure of the individual components, according to the processes which have become known, as described, for example, in the GAS MANUAL published by MESSER GRIESHEIM, 3rd edition, 1989, pages 24-28 are difficult to mix.

Insbesondere bei einem Gasgemisch, das aus Argon und CO₂ bestehen soll und das mit hohen Druck (ca. 200 bis 300 bar) in einen Druckgasbehälter, wie Speicherbehälter, Gasflasche eingeleitet werden soll, kann bei dem bekannten Verfahren eine Auskondensation des CO₂ auftreten. Ferner wird beim Füllen nur eine schlechte Durchmischung erreicht, so daß eine anschließende Bewegung (Rollen) der Gasflaschen erforderlich ist. Dies hat ferner den Nachteil, daß eine sofortige Analyse des Gasgemisches nach dem Füllen der Gasflaschen keine aussagekräftigen Ergebnisse liefert.Particularly in the case of a gas mixture which is said to consist of argon and CO₂ and which is to be introduced at high pressure (approx. 200 to 300 bar) into a compressed gas container, such as a storage container or gas cylinder, condensation of the CO₂ can occur in the known method. Furthermore, only poor mixing is achieved during filling, so that a subsequent movement (rolling) of the gas bottles is required. This also has the disadvantage that an immediate analysis of the gas mixture after filling the gas bottles does not provide any meaningful results.

Ausgehend hiervon ist es Aufgabe der vorliegenden Erfindung, ein besonders einfaches Verfahren zur Herstellung eines Gasgemisches zu schaffen, das die oben aufgeführten Nachteile nicht aufweist.Proceeding from this, it is an object of the present invention to provide a particularly simple method for producing a gas mixture which does not have the disadvantages listed above.

Zur Lösung dieser Aufgabe wird ein Verfahren mit den Merkmalen des Anspruches 1 vorgeschlagen. Weitere vorteilhafte Merkmale sind in den Unteransprüchen angegeben.To achieve this object, a method with the features of claim 1 is proposed. Further advantageous features are specified in the subclaims.

Durch die Erfindung, insbesondere die Vorgasgemischherstellung mit einem Injektor bereits vor dem Einströmen des Gasgemisches in den Druckgasbehälter, werden u.a. folgende Vorteile erreicht:

  • Das Vorgasgemisch entsteht bereits vor dem Einströmen in den bzw. die Druckgasbehälter, wodurch z.B. eine CO₂-Kondensation vermieden wird.
  • Es findet eine vollständige intensive Vermischung der Gaskomponenten außerhalb des Druckgasbehälters statt, so daß die bei bekannten Verfahren erforderlichen Tauchrohre entfallen können.
  • Eine Analyse der gewünschten Gasgemischzusammensetzung ist sofort nach dem Füllprozeß z.B. noch im Füllstand möglich.
  • Eine Gruppe von Druckgasbehältern wird mit einem Mischsystem (Injektor) befüllt, so daß der Unterschied der Gaszusammensetzung in den einzelnen Druckgasbehältern (Gasflaschen) praktisch "Null" ist.
The invention, in particular the production of the pre-gas mixture with an injector before the gas mixture flows into the compressed gas container, achieves the following advantages, among others:
  • The pre-gas mixture is created before it flows into the compressed gas tank or tanks, which prevents, for example, CO₂ condensation.
  • There is a complete intensive mixing of the gas components outside the compressed gas tank instead, so that the dip tubes required in known methods can be omitted.
  • An analysis of the desired gas mixture composition is possible immediately after the filling process, for example in the filling level.
  • A group of pressurized gas containers is filled with a mixing system (injector) so that the difference in the gas composition in the individual pressurized gas containers (gas bottles) is practically "zero".

In der Zeichnung ist eine besonders vorteilhafte Anordnung zur Durchführung des erfindungsgemäßen Verfahrens veranschaulicht.A particularly advantageous arrangement for carrying out the method according to the invention is illustrated in the drawing.

Bei der Erfindung wird zunächst mit einem Injektor 10 ein Vorgasgemisch aus einer verflüssigbaren Komponente (vorzugsweise CO₂) und einer nicht verflüssigbaren Komponente (vorzugsweise Argon) gebildet, mit einem Gemischanteil CO₂ der größer ist als der Anteil von CO₂ im fertig hergestellten Gasgemisch. Dabei wird dem Injektor 10 aus einem Argon-Vorratsbehälter 11 unter Zwischenschaltung eines Durchflußmessers 12 mit einer Meßblende 12a sowie einem Absperrventil 13 über die Leitung 14 gasförmiges Argon mit hohen Druck (p ≈ 180 - 220 bar bei Umgebungstemperatur) zugeführt. In dem Injektor 10 wird unter Zwischenschaltung eines Durchflußmessers 15 und einer Meßblende 15a und einem Absperrventil 16 über die Leitung 17 aus einem Vorratsbehälter 18 gasförmiges CO₂ entnommen und mit einem niedrigen Druck (p ≈ 40 bar) angesaugt und das gasförmige Argon mit dem gasförmigen CO₂ in einer turbulenten Strömung intensiv vermischt.In the invention, a pre-gas mixture of a liquefiable component (preferably CO₂) and a non-liquefiable component (preferably argon) is first formed with an injector 10, with a mixture proportion CO₂ which is greater than the proportion of CO₂ in the finished gas mixture. The injector 10 is supplied with gaseous argon at high pressure (p≈180-220 bar at ambient temperature) from an argon storage container 11 with the interposition of a flow meter 12 with a measuring orifice 12a and a shut-off valve 13 via line 14. In the injector 10 with the interposition of a flow meter 15 and a metering orifice 15a and a shut-off valve 16 via the line 17 from a reservoir 18 gaseous CO₂ is removed and sucked in at a low pressure (p ≈ 40 bar) and the gaseous argon with the gaseous CO₂ in a turbulent flow intensely mixed.

Über eine an den Ausgang des Injektors 10 angeschlossenen Verteiler 19, der einen sehr geringen Gesamtdruckverlust gegenüber den Behälteranschlüssen 22 aufweist, strömt das so erzeugte Vorgasgemisch in einen oder mehrere parallel vorgesehene Druckgasbehälter (Druckgasflaschen) 20, und zwar solange bis eine Menge an CO₂ in den Druckgasbehältern 20 erreicht ist, die der CO₂-Menge entspricht, die im gewünschten Gasgemisch enthalten sein muß. Danach wird die CO₂-Zufuhr unterbrochen und über die Leitung 14 und den Injektor 10 oder eine parallel zum Injektor 10 angeordnete Nebenleitung 21 solange Argon in die Druckgasflaschen 20 gefüllt, bis eine Argon-Menge erreicht ist, die im gewünschten Gasgemisch sein muß. Die Ermittlung der gewünschten Gasgemischzusammensetzung erfolgt beispielsweise durch die druck- und temperaturkompensierten Durchflußmesser 12 bzw. 15, deren Ausgangswerte automatisch erfaßt werden und bei Erreichen der Sollmenge z.B. die Absperrventile 13 und 16 entsprechend schließen.Via a distributor 19 connected to the outlet of the injector 10, which has a very low total pressure loss in relation to the container connections 22, the pre-gas mixture thus generated flows into one or more compressed gas containers (compressed gas cylinders) 20 provided in parallel, until a quantity of CO₂ in the Compressed gas containers 20 is reached, which corresponds to the amount of CO₂ that must be contained in the desired gas mixture. Then the CO₂ supply is interrupted and filled via line 14 and the injector 10 or a parallel to the injector 10 secondary line 21 as long as argon in the compressed gas bottles 20 until an amount of argon is reached, which must be in the desired gas mixture. The desired gas mixture composition is determined, for example, by the pressure and temperature compensated flow meters 12 and 15, the output values of which are automatically recorded and, for example, close the shut-off valves 13 and 16 accordingly.

Bei einer anderen ebenfalls vorteilhaften Variante wird die Gasgemischzusammensetzung gravimetrisch ermittelt, indem eine der Flaschen (Referenzflasche) auf einer Waage 23 steht. Die CO₂-Menge wird durch eine druck- und temperaturkompensierte Durchflußmessung ermittelt. Der Argonanteil im Gemisch wird durch Subtraktion der CO₂-Menge vom Gemisch errechnet.In another variant which is also advantageous, the gas mixture composition is determined gravimetrically by one of the bottles (reference bottle) standing on a scale 23. The amount of CO₂ is determined by a pressure and temperature compensated flow measurement. The proportion of argon in the mixture is calculated by subtracting the amount of CO₂ from the mixture.

Die Gemischherstellung wird über einen Rechner und zugeordneten Ventilen etc. gesteuert.The mixture production is controlled via a computer and assigned valves etc.

Der max. zulässige Fülldruck wird ständig überwacht, so daß es sich bei dieser Variante um ein manometrisches Füll- und gravimetrisches Mischverfahren handelt.The max. permissible filling pressure is constantly monitored, so that this variant is a manometric filling and gravimetric mixing process.

Das oben beschriebene und in den Ansprüchen gekennzeichnete Verfahren ist außer zur Herstellung von Argon / CO₂-Mischgasen (z.B. für Schweiß- und Schneidzwecke) mit einem CO₂-Anteil zwischen 2,5 und 20 % auch für die Herstellung von anderen Gasgemischen wie N₂ / CO₂-Gemische mit bis zu 30 % CO₂-Anteil.The method described above and characterized in the claims is not only for the production of argon / CO₂ mixed gases (eg for welding and cutting purposes) with a CO₂ content between 2.5 and 20% also for the production of other gas mixtures such as N₂ / CO₂ Mixtures with up to 30% CO₂ content.

Ferner ist es selbstverständlich möglich, das Vorgasgemisch nicht direkt einer oder mehreren Gasflasche(n) zuzuführen, sondern in einem Behälter zwischenzuspeichern. Aus dem Speicherbehälter, der auch transportabel ausgebildet werden kann, kann dann an einem beliebigen Ort z.B. beim Kunden vor Ort die endgültige Gasgemischzusammensetzung erfolgen.Furthermore, it is of course possible not to feed the pre-gas mixture directly to one or more gas bottle (s), but to store it temporarily in a container. The storage container, which can also be made portable, can then be used at any location, e.g. the final gas mixture is made at the customer's site.

Claims (5)

  1. Method for preparing a gas mixture in a compressed-gas container, comprising at least one component which is condensible at ambient temperature and at a pressure below the compressed-gas container pressure, and comprising at least one component which is incondensible at said pressure and said temperature, characterized in that first, by means of an injector, a gas premix is formed with the condensible component, the fraction of the condensible component within the premix being larger than the fraction of the condensible component in the ready-mixed gas mixture, in that then the gas premix is introduced into the compressed-gas container, and in that then the incondensible component continues to be introduced into the compressed-gas container until the desired gas mixture composition has been reached.
  2. Method according to Claim 1, characterized in that the condensible component is carbon dioxide and the incondensible component is an inert gas such as argon/nitrogen.
  3. Method according to Claim 1 or 2, characterized in that the incondensible component above its dew-point is available at the injector with a pressure between 180 and 380 bar.
  4. Method according to any one of Claims 1 to 3, characterized in that the components continue to be mixed in the injector and to be introduced into the compressed-gas container until a defined amount of the condensible component has been reached, in that said component is then disconnected and the incondensible component continues to be fed into the compressed-gas container until a defined amount of the gas mixture has been reached.
  5. Method according to Claim 4, characterized in that the amounts are determined by a pressure- and temperature-compensated flow rate measurement and/or gravimetrically (balance 23).
EP93102283A 1992-02-20 1993-02-13 Process for the production of a gas mixture Expired - Lifetime EP0556753B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4205126 1992-02-20
DE4205126A DE4205126A1 (en) 1992-02-20 1992-02-20 METHOD FOR PRODUCING A GAS MIXTURE

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EP0556753A1 EP0556753A1 (en) 1993-08-25
EP0556753B1 true EP0556753B1 (en) 1995-06-07

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ES2122837B1 (en) * 1993-02-26 1999-07-01 Air Liquide Australia GAS MIXTURE AND PROCEDURE FOR PREPARING IT.
US5937917A (en) * 1996-06-12 1999-08-17 Matsushita Electric Industrial Co., Ltd. Charging method and charging structure of combustible gas and oxidizer gas, and material to be charged by using the charging method and the charging structure
DE19846288A1 (en) * 1998-10-08 2000-04-20 Messer Griesheim Gmbh Production of gas mixtures in large quantities
DE19846287A1 (en) * 1998-10-08 2000-04-20 Messer Griesheim Gmbh Production of gas mixtures with portable compressed gas containers
DE19907362C2 (en) * 1999-02-20 2003-04-17 Draeger Medical Ag Method for mixing oxygen with air in a ventilator with a venturi nozzle
DE19915779B4 (en) * 1999-04-08 2007-10-31 Air Liquide Deutschland Gmbh Filling level for the production of precision gas mixtures
JP2003065495A (en) * 2001-08-28 2003-03-05 Nippon Sanso Corp Mixed gas charging method and device
DE102008015395A1 (en) * 2008-03-20 2009-09-24 L'Air Liquide, S.A. pour l'Etude et l'Exploitation des Procédés Georges Claude Gas mixture e.g. tertiary gas mixture, producing method, involves determining pressure in gas container and flow technically connecting storage container with gas container until pressure in gas container reaches predetermined value
DE102009015511B3 (en) * 2009-04-02 2010-12-09 Tauchtechnik Schmitt Gmbh Apparatus for filling a dipping bottle and a method for operating this
CN105547797A (en) * 2015-12-23 2016-05-04 上海神开气体技术有限公司 A method of rapidly preparing a low-concentration well-logging standard gas mixture
CN114033965B (en) * 2021-11-12 2022-08-30 济南华信流体控制有限公司 Filling control system for single-component or multi-component gas

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DE1112025B (en) * 1956-08-24 1961-08-03 Iale Four Ind Belgeia Sa Device for maintaining the composition of a mixture of air and combustible gas constant
US3948281A (en) * 1973-02-22 1976-04-06 Scott Environmental Technology, Inc. Gas blending using null balance analyzer
FR2374072A1 (en) * 1976-12-20 1978-07-13 Carboxyque Francaise Preventing reliquefaction of carbon di:oxide - by addn. of e.g. argon which prevents liquefaction even under high pressure
FR2646496B1 (en) * 1989-04-28 1994-05-06 Air Liquide METHOD AND INSTALLATION FOR PROVIDING A GAS MIXTURE UNDER HIGH PRESSURE

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DE4205126A1 (en) 1993-08-26
EP0556753A1 (en) 1993-08-25
ATE123561T1 (en) 1995-06-15

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