EP1547637A2 - 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
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
Application number
EP04300773A
Other languages
English (en)
French (fr)
Other versions
EP1547637B1 (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
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1547637A2 publication Critical patent/EP1547637A2/de
Publication of EP1547637A3 publication Critical patent/EP1547637A3/de
Application granted granted Critical
Publication of EP1547637B1 publication Critical patent/EP1547637B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Family

ID=34531401

Family Applications (1)

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
EP1547637B1 (de) 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 (de) 2005-07-13

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