EP1547637A2 - Conditionnement en dynamique de mélanges gazeux à pression élevée, en particulier de mélange N2O/O2 - Google Patents
Conditionnement en dynamique de mélanges gazeux à pression élevée, en particulier de mélange N2O/O2 Download PDFInfo
- Publication number
- EP1547637A2 EP1547637A2 EP04300773A EP04300773A EP1547637A2 EP 1547637 A2 EP1547637 A2 EP 1547637A2 EP 04300773 A EP04300773 A EP 04300773A EP 04300773 A EP04300773 A EP 04300773A EP 1547637 A2 EP1547637 A2 EP 1547637A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compound
- pressure
- gaseous
- 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.)
- Granted
Links
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 therefore controlled by measuring the pressure and gas temperature.
- the determination of gas contents is based on two instruments which add up their measurement inaccuracies.
- the location of the points measuring system on the packaging plant does not allow direct access to physical quantities sought, namely temperature and pressure are usually measured on the conditioning ramp by a temperature sensor or a sensor of pressure.
- the values thus measured are only approximations but not effective measurements of the temperature or pressure inside the containers conditioning.
- 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 gas mixture in its final composition expected from the beginning to the end of the filling sequence.
- the mixture is made in upstream of the conditioning ramp in a very low mixing chamber dimension where are introduced continuously the various gaseous constituents entering the composition of the final mixture.
- the quantities introduced for each gas are controlled by a flow meter mass 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 gas through the action of an automatic control system. Counting the masses by mass flow meter makes it possible to overcome the uncertainties of measurements and the hazards of realization related to the inaccuracies on the quantities mentioned above.
- Conditioning with a dynamic mixer is however accompanied in in some cases, a relaxation of the gas downstream of the mixing chamber and a lowering of the temperature of the gases below the temperature of demixing or demixing, which can be 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 gas circulation 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 kept and the differences in levels are sufficiently low to control all the bottles by analysis of a single bottle taken from the ramp of conditioning.
- 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.
- 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 stage with pressure can be carried out by mass counting 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 stage is generally correctly; nevertheless, it can be accelerated, if necessary, by a packaging cycle after filling and / or using a dip tube which allows to introduce the 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)
Abstract
Description
- la première pression (P1) est comprise entre 100 et 200 bars, de préférence inférieure ou égale à 170 bars.
- la deuxième pression (P2) est supérieure à 200 bars, de préférence supérieure à 250 bars, de préférence encore supérieure ou égale à 300 bars.
- le premier composé est de l'oxygène et le deuxième composé est du protoxyde d'azote (N2O), et on réalise, à l'étape (a), un pré-mélange O2/N2O. La teneur en le premier composé est supérieure ou égale à 30 %, de préférence entre 30 et 60 % et/ou la teneur en le deuxième composé est supérieure ou égale à 35 %, de préférence d'au moins 40 %.
- le premier composé est de l'oxygène et le deuxième composé est du dioxyde de carbone (CO2), et on réalise, à l'étape (a), un pré-mélange O2/CO2. La teneur en le deuxième composé est comprise entre 1 et 10% en volume, de préférence entre 3 et 7%.
- à l'étape (a), le pré-mélange gazeux est introduit dans un ou plusieurs récipients de conditionnement, en particulier des bouteilles de gaz sous pression.
- à l'étape (a), le pré-mélange gazeux est réalisé au moyen d'un mélangeur en dynamique.
- à l'étape (b), on augmente progressivement la pression du pré-mélange gazeux jusqu'à la deuxième pression (P2) et on diminue concomitamment la proportion du deuxième composé dans le mélange depuis la teneur intermédiaire (Ti) jusqu'à la teneur finale (Tf) souhaitée dudit deuxième composé dans le mélange final désiré. Pour atteindre une valeur finale (Tf) précise souhaitée, on peut utiliser un débitmètre massique.
- le mélange gazeux souhaité est constitué de 50% en volume d'oxygène en tant que premier composé et de 50% en volume de protoxyde d'azote (N2O) en tant que deuxième composé.
- d'abord la réalisation d'un pré-mélange O2/N2O au moyen d'un mélangeur dynamique de manière à obtenir pré-mélange O2/N2O à une pression entre 100 et 200 bars à une teneur initiale Ti en N2O supérieure (Ti = 60% en volume par exemple) à la teneur finale Tf (Tf = 50% en volume en N2O), le pré-mélange O2/N2O étant introduit dans les récipients de conditionnement d'une chaíne de remplissage, telles que des bouteilles de gaz,
- puis une mise en pression du pré-mélange, c'est-à-dire une augmentation progressive de la pression au-delà de 200 bars, par dilution avec de l'O2 gazeux jusqu'à obtenir la pression finale souhaitée, par exemple une pression de 250 bars à 300 bars, ou plus.
Claims (11)
- Procédé de fabrication d'un mélange gazeux contenant au moins un premier composé et au moins un deuxième composé dans des proportions désirées, lesdits premier et deuxième composés étant choisis dans le groupe formé par O2, N2, He, CO2, N2O et CO, dans lequel :(a) on réalise un pré-mélange en dynamique de proportions déterminées desdits premier et deuxième composés pour obtenir un pré-mélange gazeux à une première pression (P1) inférieure ou égale à 200 bars et contenant une teneur intermédiaire (Ti) dudit deuxième composé supérieure à la teneur finale (Tf) dudit deuxième composé dans la composition finale souhaitée,(b) on augmente la pression du pré-mélange gazeux obtenu à l'étape (a) par introduction du premier composé de manière à réaliser concomitamment une dilution du deuxième composé avec ledit premier composé,(c) on stoppe l'étape (b), lorsque le mélange gazeux atteint la deuxième pression (P2) souhaitée, avec P2 > P1 et P2 > 170 bars, et contient une teneur finale (Tf) souhaitée en le deuxième composé.
- Procédé selon la revendication 1, caractérisé en ce que la première pression (P1) est comprise entre 100 et 200 bars, de préférence inférieure ou égale à 170 bars.
- Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la deuxième pression (P2) est supérieure à 200 bars, de préférence supérieure à 250 bars, de préférence encore supérieure ou égale à 300 bars.
- Procédé selon l'une des revendications 1 ou 3, caractérisé en ce que le premier composé est de l'oxygène et le deuxième composé est du protoxyde d'azote (N2O), et on réalise, à l'étape (a), un pré-mélange O2/N2O.
- Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la teneur en le premier composé est supérieure ou égale à 30 %, de préférence entre 30 et 60 % et/ou la teneur en le deuxième composé est supérieure ou égale à 35 %, de préférence d'au moins 40 % en volume.
- Procédé selon l'une des revendications 1 ou 3, caractérisé en ce que le premier composé est de l'oxygène et le deuxième composé est du dioxyde de carbone (CO2), et on réalise, à l'étape (a), un pré-mélange O2/CO2, de préférence la teneur en le deuxième composé est comprise entre 1 et 10%, préférentiellement entre 3 et 7% en volume.
- Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'à l'étape (a), le pré-mélange gazeux est introduit dans un ou plusieurs récipients de conditionnement, en particulier des bouteilles de gaz sous pression.
- Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'à l'étape (a), le pré-mélange gazeux est réalisé au moyen d'un mélangeur en dynamique.
- Procédé selon l'une des revendications 1 à 8, caractérisé en ce qu'à l'étape (b), on augmente progressivement la pression du pré-mélange gazeux jusqu'à la deuxième pression (P2) et on diminue concomitamment la proportion du deuxième composé dans le mélange depuis la teneur intermédiaire (Ti) jusqu'à la teneur finale (Tf) souhaitée dudit deuxième composé dans le mélange final désiré.
- Procédé selon l'une des revendications 1 à 5 et 7 à 9, caractérisé en ce que le mélange gazeux souhaité est constitué de 50% en volume d'oxygène en tant que premier composé et de 50% en volume de protoxyde d'azote (N2O) en tant que deuxième composé.
- Procédé de conditionnement de récipients de gaz, dans lequel on réalise et on introduit un mélange gazeux contenant un premier et un deuxième composés gazeux dans plusieurs récipients de conditionnement, ledit mélange gazeux étant réalisé par mise en oeuvre d'un procédé de fabrication selon l'une des revendications 1 à 10, de préférence le mélange gazeux est constitué d'oxygène et de protoxyde d'azote (N2O).
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 true EP1547637A2 (fr) | 2005-06-29 |
| EP1547637A3 EP1547637A3 (fr) | 2005-07-13 |
| EP1547637B1 EP1547637B1 (fr) | 2006-12-27 |
Family
ID=34531401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040300773 Expired - Lifetime EP1547637B1 (fr) | 2003-12-17 | 2004-11-09 | Conditionnement en dynamique de mélanges gazeux à pression élevée, en particulier de mélange N2O/O2 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7267143B2 (fr) |
| EP (1) | EP1547637B1 (fr) |
| AT (1) | ATE349270T1 (fr) |
| DE (1) | DE602004003890T2 (fr) |
| ES (1) | ES2279318T3 (fr) |
| FR (1) | FR2863912B1 (fr) |
Families Citing this family (1)
| 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)
| 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 |
-
2003
- 2003-12-17 FR FR0351093A patent/FR2863912B1/fr not_active Expired - Fee Related
-
2004
- 2004-11-09 ES ES04300773T patent/ES2279318T3/es not_active Expired - Lifetime
- 2004-11-09 EP EP20040300773 patent/EP1547637B1/fr not_active Expired - Lifetime
- 2004-11-09 DE DE200460003890 patent/DE602004003890T2/de not_active Expired - Lifetime
- 2004-11-09 AT AT04300773T patent/ATE349270T1/de not_active IP Right Cessation
- 2004-12-16 US US11/014,349 patent/US7267143B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1547637B1 (fr) | 2006-12-27 |
| 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 |
| EP1547637A3 (fr) | 2005-07-13 |
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