EP1547637B1 - Dynamische Behandlung von Gasmischungen mit hohen Drücken, insbesondere N2O/O2 Mischungen - Google Patents

Dynamische Behandlung von Gasmischungen mit hohen Drücken, insbesondere N2O/O2 Mischungen Download PDF

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Publication number
EP1547637B1
EP1547637B1 EP20040300773 EP04300773A EP1547637B1 EP 1547637 B1 EP1547637 B1 EP 1547637B1 EP 20040300773 EP20040300773 EP 20040300773 EP 04300773 A EP04300773 A EP 04300773A EP 1547637 B1 EP1547637 B1 EP 1547637B1
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EP
European Patent Office
Prior art keywords
component
pressure
gas
bar
content
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.)
Expired - Lifetime
Application number
EP20040300773
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English (en)
French (fr)
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EP1547637A2 (de
EP1547637A3 (de
Inventor
François Simondet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide Sante International SA
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Air Liquide Sante International SA
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Publication of EP1547637A3 publication Critical patent/EP1547637A3/de
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Classifications

    • 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
    • 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
    • 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
    • F17C2223/03—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
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2223/035—High pressure (>10 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/02—Mixing fluids
    • F17C2265/025—Mixing fluids different fluids
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes

Definitions

  • the present invention relates to a dynamic process for conditioning gas mixtures, in particular O 2 / N 2 O mixtures containing a proportion of N 2 O greater than or equal to 30% by volume for a pressure of at least 170 bars.
  • the so-called gravimetric conditioning method is generally used to condition gaseous mixtures based on liquefied gases, such as N 2 O or CO 2 , or mixtures of air gases, such as O 2 , N 2 , Ar or He .
  • this method of manufacture has the drawbacks of leading to a high rate of manufacturing waste, after analytical control, an unproductive manufacturing method because the containers must be filled to the unit, a cycle of packaging rolling penalizing times production, and at a high cost of analytical control.
  • the quantities of gas introduced are thus controlled by measuring the pressure and the temperature of the gases.
  • the determination of the gas contents is based on two measuring instruments that add up their measurement inaccuracies.
  • the location of the measuring points on the conditioning plant does not allow direct access to the desired physical quantities, ie the temperature and the pressure are generally measured on the conditioning ramp by a temperature sensor or a temperature sensor. Pressure sensor.
  • the values thus measured are only approximations but not actual measurements of the temperature or pressure inside the conditioning containers.
  • the dynamic gas mixing method makes it possible to overcome some of these problems and disadvantages.
  • This method described, in particular by the document EP-A-1174178 consists in filling the bottles with the gaseous mixture in its final composition expected from the beginning to the end of the filling sequence.
  • the mixture is produced upstream of the conditioning ramp in a very small mixing chamber where the various gaseous constituents entering into the composition of the final mixture are introduced continuously.
  • the quantities introduced for each gas are controlled by a mass flow meter installed on each line of gas used in the composition of the mixture to be produced.
  • a set of several control valves makes it possible to control the flow of the gases through the action of an automatic control system.
  • the mass counting by mass flow meter makes it possible to overcome the measurement uncertainties and the production uncertainties related to the inaccuracies on the quantities mentioned above.
  • Conditioning with a dynamic mixer is, however, accompanied in some cases by an expansion of the gas downstream of the mixing chamber and a lowering of the gas temperature below the demixing or demixing temperature. which is explained by the fact that the line downstream of the chamber is at the same pressure as the containers brought back to atmospheric pressure. The flow of gases is then two-phase in the packaging ramps to the bottles.
  • the mixture is thus always maintained in the gaseous state, the homogeneity of the mixture is maintained and the variations in contents are sufficiently low to allow control all the bottles by analysis of a single bottle taken from the packaging ramp.
  • the final pressure is limited by the pressurization of N 2 O at around 170 bars.
  • the N 2 O must then be heated to rise to higher pressures and this then generates its passage to the supercritical state.
  • the reheating temperature is also limited by the decomposition temperature of N 2 O and this, especially as some metals of the packaging device and the bottle, such as silver, platinum, cobalt, copper and nickel oxides, are catalysts of the reaction.
  • the problem to be solved is therefore to improve the packaging process with dynamic mixer, in particular the method described in document EP-A-1174178, so as to be able to produce dynamic packaging of gaseous mixtures at pressures greater than 170 bar, in particular N 2 O / O 2 medical gas mixtures whose N 2 O content is greater than or equal to 30% by volume.
  • US-A-4,718,462 discloses a method of manufacturing a gaseous mixture containing at least a first compound and at least a second compound in desired proportions, according to the preamble of claim 1.
  • the invention also relates to a method for packaging gas containers, in which a gas mixture containing a first and a second gaseous compound is produced and introduced into a plurality of packaging containers, said gaseous mixture being produced by use of a manufacturing method according to the invention, preferably the gaseous mixture consists of oxygen and nitrous oxide (N 2 O).
  • the first step of carrying out premixing with a dynamic mixer makes it possible to obtain an O 2 / N 2 O premix with an accuracy of ⁇ 0.5%.
  • the dilution by pressure rise makes it possible to obtain a precise O 2 / N 2 O mixture at a high pressure, that is to say up to 250 to 300 bar or more, preferably by monitoring the temperature / pressure pair by means of one or more pressure and temperature sensors, the precision resulting from the use of a mass flowmeter.
  • control of the introduction of oxygen, during the dilution step with rise in pressure can be carried out by a mass metering at the mass flow meter, which ensures the realization of a very precise mixture at high pressure.
  • the homogenization of the mixture during the second preparation step is generally done correctly; however, it can be accelerated, if necessary, by a cycle of rolling packs after filling and / or by the use of a dip tube that allows the introduction of oxygen at the bottom of each container during filling.
  • the advantages of the method for producing the O 2 / N 2 O mixture include an accuracy and homogeneity of the gaseous compositions produced; a final pressure of the mixture which is no longer limited by the conditioning method; or a lack of demixing at low temperatures for full bottles.
  • the method of preparation is not limited to the case of O 2 / N 2 O mixtures. It may be generalized to other gases or mixtures containing one or more gases, such as CO 2 , N 2 O, O 2 , N 2 , Hey ...

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Silicon Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Accessories For Mixers (AREA)
  • Treating Waste Gases (AREA)

Claims (11)

  1. Verfahren zur Herstellung eines Gasgemisches, umfassend mindestens eine erste Verbindung und mindestens eine zweite Verbindung in gewünschten Verhältnissen, wobei die erste und die zweite Verbindung in der Gruppe, die von O2, N2, He, CO2, N2O und CO gebildet ist, ausgewählt werden, wobei:
    (a) ein Vorgemisch dynamisch mit bestimmten Verhältnissen der ersten und zweiten Verbindung hergestellt wird, um ein Gasvorgemisch mit einem ersten Durck (P1) zu erhalten, das einen Zwischengehalt (Ti) der zweiten Verbindung größer als der Endgehalt (Tf) der zweiten Verbindung in der gewünschten endgültigen Zusammensetzung enthält,
    (b) der Druck des in Schritt (a) hergestellten Gasvorgemisches durch Einführung der ersten Verbindung erhöht wird, um begleitend eine Verdünnung der zweiten Verbindung mit der ersten Verbindung durchzuführen,
    dadurch gekennzeichnet, dass:
    - in Schritt (a) der erste Druck P1 kleiner oder gleich 200 Bar ist,
    - und dass folgender Schritt hinzugefügt wird:
    (c) der Schritt (b) wird angehalten, wenn das Gasgemisch den zweiten gewünschten Druck (P2) erreicht, wobei P2 > P1 und P2 > 170 Bar, und einen gewünschten Endgehalt (Tf) an der zweiten Verbindung enthält.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der erste Druck (P1) zwischen 100 und 200 Bar beträgt und vorzugsweise kleiner oder gleich 170 Bar ist.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der zweite Druck (P2) größer als 200 Bar, vorzugsweise größer als 250 Bar, auf noch bevorzugtere Weise größer oder gleich 300 Bar ist.
  4. Verfahren nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, dass die erste Verbindung Sauerstoff und die zweite Verbindung Stickstoffprotoxid (N2O) ist, und dass in Schritt (a) ein Vorgemisch O2/N2O hergestellt wird.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Gehalt an der ersten Verbindung größer oder gleich 30 % ist, vorzugsweise zwischen 30 und 60 % beträgt, und/oder dass der Gehalt an der zweiten Verbindung größer oder gleich 35 % ist, vorzugsweise mindestens 40 Vol.-% beträgt.
  6. Verfahren nach einem der Ansprüche 1 oder 3, dadurch gekennzeichnet, dass die erste Verbindung Sauerstoff und die zweite Verbidung Kohlendioxid (CO2) ist, und dass in Schritt (a) ein Vorgemisch O2/CO2 hergestellt wird, und dass vorzugsweise der Gehalt an der zweiten Verbindung zwischen 1 und 10 Vol.-%, vorteilhafterweise zwischen 3 und 7 Vol.-% beträgt.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass in Schritt (a) das Gasvorgemisch in einen oder mehrere Verpackungsbehälter eingeleitet wird, insbesondere in Druckgasflaschen.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass in Schritt (a) das Gasvorgemisch mit Hilfe eines dynamischen Mischers hergestellt wird.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass in Schritt (b) nach und nach der Druck des Gasvorgemisches bis auf den zweiten Druck (P2) erhöht und begleitend der Anteil der zweiten Verbindung in dem Gemisch vom Zwischengehalt (Ti) bis zum gewünschten Endgehalt (Tf) der zweiten Verbindung in dem gewünschten Endgemisch verringert wird.
  10. Verfahren nach einem der Ansprüche 1 bis 5, und nach einem der Ansprüche 7 bis 9, wenn sie von den Ansprüchen 1 bis 5 abhängen, dadurch gekennzeichnet, dass das gewünschte Gasgemisch aus 50 Vol.-% Sauerstoff als erste Verbindung und 50 Vol.-% Stickstoffprotoxid (N2O) als zweite Verbindung besteht.
  11. Verfahren zur Verpackung von Gasbehältern, bei dem ein Gasgemisch, das eine erste und eine zweite gasförmige Verbindung enthält, hergestellt und in mehrere Verpackungsbehälter eingeleitet wird, wobei das Gasgemisch durch Einsatz eines Herstellungsverfahrens nach einem der Ansprüche 1 bis 10 hergestellt wird, wobei das Gasgemisch vorzugsweise aus Sauerstoff und Stickstoffprotoxid (N2O) besteht.
EP20040300773 2003-12-17 2004-11-09 Dynamische Behandlung von Gasmischungen mit hohen Drücken, insbesondere N2O/O2 Mischungen Expired - Lifetime EP1547637B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0351093A FR2863912B1 (fr) 2003-12-17 2003-12-17 Conditionnement en dynamique de melanges gazeux a pression elevee, en particulier de melange n2o/o2
FR0351093 2003-12-17

Publications (3)

Publication Number Publication Date
EP1547637A2 EP1547637A2 (de) 2005-06-29
EP1547637A3 EP1547637A3 (de) 2005-07-13
EP1547637B1 true EP1547637B1 (de) 2006-12-27

Family

ID=34531401

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Application Number Title Priority Date Filing Date
EP20040300773 Expired - Lifetime EP1547637B1 (de) 2003-12-17 2004-11-09 Dynamische Behandlung von Gasmischungen mit hohen Drücken, insbesondere N2O/O2 Mischungen

Country Status (6)

Country Link
US (1) US7267143B2 (de)
EP (1) EP1547637B1 (de)
AT (1) ATE349270T1 (de)
DE (1) DE602004003890T2 (de)
ES (1) ES2279318T3 (de)
FR (1) FR2863912B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2976259B1 (fr) 2011-06-09 2013-07-05 Air Liquide Procede de conditionnement d'un melange gazeux no/n2

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473885B1 (fr) * 1980-01-18 1986-01-10 Fix R Procede d'obtention d'un moyen therapeutique sous forme gazeuse, dispositif pour la mise en oeuvre de ce procede, et moyen therapeutique ainsi obtenu
DE19651994A1 (de) * 1996-12-13 1998-06-18 Basf Ag Verfahren zur Herstellung von selbsttrennenden, kompakten oder zelligen, gegebenenfalls Verstärkungsmittel enthaltenden Formkörpern aus Polyisocyanat-Polyadditionsprodukten und innere Formtrennmittel hierfür
FR2811910B1 (fr) * 2000-07-18 2003-01-24 Air Liquide Sante France Procede et installation de conditionnement en dynamique de gaz notamment a usage medical

Also Published As

Publication number Publication date
ES2279318T3 (es) 2007-08-16
DE602004003890T2 (de) 2007-10-31
ATE349270T1 (de) 2007-01-15
FR2863912A1 (fr) 2005-06-24
US20050155643A1 (en) 2005-07-21
DE602004003890D1 (de) 2007-02-08
US7267143B2 (en) 2007-09-11
FR2863912B1 (fr) 2006-02-03
EP1547637A2 (de) 2005-06-29
EP1547637A3 (de) 2005-07-13

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