WO2001025781A2 - Dispositif de production de gaz traceurs a au moins une composante a partir de matieres organico-chimiques - Google Patents

Dispositif de production de gaz traceurs a au moins une composante a partir de matieres organico-chimiques Download PDF

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Publication number
WO2001025781A2
WO2001025781A2 PCT/DE2000/003459 DE0003459W WO0125781A2 WO 2001025781 A2 WO2001025781 A2 WO 2001025781A2 DE 0003459 W DE0003459 W DE 0003459W WO 0125781 A2 WO0125781 A2 WO 0125781A2
Authority
WO
WIPO (PCT)
Prior art keywords
evaporation
mixing chamber
gas
gas discharge
test gas
Prior art date
Application number
PCT/DE2000/003459
Other languages
German (de)
English (en)
Other versions
WO2001025781A3 (fr
Inventor
Uwe Risse
Heidrun Behrendt
Original Assignee
Technische Universität München
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 Technische Universität München filed Critical Technische Universität München
Priority to AU13808/01A priority Critical patent/AU1380801A/en
Publication of WO2001025781A2 publication Critical patent/WO2001025781A2/fr
Publication of WO2001025781A3 publication Critical patent/WO2001025781A3/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0006—Calibrating gas analysers
    • 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

Definitions

  • a test gas is a gas mixture that consists of a basic gas and one or more admixtures, which are also gaseous or vaporous and are homogeneously distributed in the basic gas.
  • the base gas can be a pure gas (e.g. nitrogen) or a gas mixture (e.g. synthetic air).
  • Test gases are used in various areas to solve a wide variety of tasks.
  • the applications range from the calibration of measuring systems to physico-chemical investigations to the generation of test atmospheres in the context of medical or toxicological studies. Especially for the latter application, it is often necessary to generate defined gas mixtures of volatile or semi-volatile organic chemical substances or corresponding mixtures of substances. Many applications also require that the concentration of the admixtures can be changed.
  • test gas One possibility for the dynamic production of test gas is the process of continuous or periodic injection, in which a defined amount of the admixture is added to a flowing base gas.
  • a defined amount of the admixture is added to a flowing base gas.
  • Various dosing devices are available to the person skilled in the art for this.
  • the respective admixture is an organic chemical substance of the above-mentioned categories, the admixture is in the liquid state at room temperature.
  • the problem arises that the relative dosing errors become larger due to device-specific properties and the properties of the substance to be dosed.
  • Another problem is the complete mixing of the liquid component with the base gas, since substances with a higher boiling point are more difficult to mix with the base gas.
  • test gases with very low VOC or SVOC concentrations in the range from a few micrograms per cubic meter to a few hundred milligrams per cubic meter, the concentration of the addition being all in one wide range should be variable, but the selected concentration must be reached relatively quickly and must be set and maintained with high accuracy.
  • concentration of the addition being all in one wide range should be variable, but the selected concentration must be reached relatively quickly and must be set and maintained with high accuracy.
  • a base gas and a volatile or semi-volatile organic chemical liquid substance or a mixture of different substances are then fed into an evaporation and mixing chamber. These substances have a boiling point in the range from 25 ° C to 300 ° C.
  • the liquid substance is introduced into the evaporation and mixing chamber by means of a microdosing device through a liquid substance feed line in the form of a cannula.
  • the base gas is supplied via a base gas feed line.
  • the temperature of the evaporation and mixing chamber is chosen so that the liquid evaporates completely, ie if it is If a liquid mixture is involved, a temperature is selected at which the component with the highest boiling point will certainly evaporate completely.
  • the invention enables the generation of dynamic test gases from organic chemical substances with a boiling point range of approximately 25-300 ° C.
  • concentration range of the admixture in the test gas is variable over several powers of ten, whereby a change in concentration is possible within a few minutes.
  • the invention also makes it possible to generate multicomponent test gases directly from mixtures of chemical substances, so that for the first time a very universally applicable method for producing test gases defined above is available.
  • a separate temperature control is provided for each evaporation and mixing chamber. So each of the liquid substances be evaporated at an optimal evaporation temperature. This is an advantage if, for. B. changes the temperature and / or flow rate of the base gas quickly. The operating parameters can be stabilized by this development of the invention.
  • liquid substance supply lines are provided, each with a microdosing device. This further development is advantageous if the various substances cannot be mixed sufficiently in the liquid phase, all liquid substance feed lines opening into a single evaporation and mixing chamber if the optimum vaporization temperatures of the individual substances do not deviate too much from one another. If this is not the case, several evaporation and mixing chambers are used according to claim 6.
  • the basic gas supply line is heated. This measure results in very stable operating conditions, since temperature fluctuations in the base gas have a major influence on the temperature conditions in the evaporation and mixing chamber and thus on the quality of the evaporation process and the mixing.
  • mixing elements are provided in the evaporation and mixing chamber in order to achieve a further improvement in the mixing.
  • active elements such as e.g. B. motor-driven rotary wing can be used.
  • the mixing elements are heated.
  • a heating device for the test gas discharge is provided. Temperature control of the test gas discharge line to a predetermined temperature also reliably prevents possible wall adsorption effects and condensation reactions in the test gas discharge line.
  • a heatable second mixing chamber is provided at the outlet end of the test gas discharge line, into which further base gas is mixed via a base gas supply line, the excess gas being discharged and discarded by a controllable excess gas discharge line, so that in turn only the remaining volume fraction is via a test gas discharge line is taken as a test gas with high flow resistance. This measure results in a further dilution of the test gas.
  • test gas concentration can be changed within very wide limits.
  • FIG. 1 shows the schematic representation of a device for test gas generation with two evaporation and mixing chambers and a downstream mixing chamber.
  • FIG. 2 shows the device according to FIG. 1 with an additional heating device on the evaporation and mixing chambers.
  • a liquid substance VOC I is introduced into the evaporation and mixing chamber 3 through a cannula 8 by means of a metering device (not shown).
  • a liquid substance VOC II which is difficult to mix with the liquid substance VOC I, is introduced separately into the evaporation and mixing chamber 4 via a cannula 9.
  • the basic gas flow is divided after the heating device 6 and flows through the evaporation and mixing chambers 3 and 4, which are kept at a predetermined temperature by a heated housing 21.
  • the vaporized liquid substances VOC I and VOC II mix with the base gas and are discharged from the respective evaporation and mixing chamber 3, 4 into a common mixing chamber 1 0 and mixed with a mixing element 1 1 a.
  • Part of this gas mixture is discharged via an excess gas discharge line 1 2.
  • the remaining volume fraction is passed through a capillary 13, which runs through a temperature-controlled space 14 and ends in the second mixing chamber 5.
  • basic gas is introduced again via the basic gas line 2b and the gas mixture is thus further diluted and mixed with a mixing element 11b.
  • test gas mixture is also a part discharged via an excess gas discharge line 1 5, so that only a small volume fraction remains as test gas, which is taken from a test gas discharge line 1 6.
  • the optimal process parameters are set in each case by means of the valves 17 to 20. It is known to the person skilled in the art that fully automatic test gas generation is possible with pressure and temperature sensors and flow measuring devices in connection with a control unit, so that this embodiment falls within the field of professional action and need not be explained in more detail.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un dispositif de production de gaz traceurs dynamiques à au moins une composante par évaporation de composants organiques volatils dans une chambre d'évaporation et de mélange (3, 4) qui est traversée par un gaz de base. L'invention concerne la génération de gaz traceurs dynamiques à partir de matières organico-chimiques dont le point d'ébullition est compris entre 25 et 300 °C. La plage de concentration du mélange dans le gaz traceur est variable de l'ordre de plusieurs puissances de dix, la concentration pouvant être modifiée en quelques minutes. L'invention permet également de produire des gaz traceurs à plusieurs composantes directement à partir de mélanges de matières chimiques, de telle façon que l'on dispose d'un procédé très universel pour produire les gaz traceurs susmentionnés.
PCT/DE2000/003459 1999-10-04 2000-10-02 Dispositif de production de gaz traceurs a au moins une composante a partir de matieres organico-chimiques WO2001025781A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU13808/01A AU1380801A (en) 1999-10-04 2000-10-02 Device for producing a single or multiple component test gas from organic-chemical substances

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19947609.8 1999-10-04
DE19947609A DE19947609C1 (de) 1999-10-04 1999-10-04 Vorrichtung zur Erzeugung von Ein- oder Mehrkomponenten-Prüfgas organisch-chemischer Stoffe

Publications (2)

Publication Number Publication Date
WO2001025781A2 true WO2001025781A2 (fr) 2001-04-12
WO2001025781A3 WO2001025781A3 (fr) 2002-02-07

Family

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PCT/DE2000/003459 WO2001025781A2 (fr) 1999-10-04 2000-10-02 Dispositif de production de gaz traceurs a au moins une composante a partir de matieres organico-chimiques

Country Status (3)

Country Link
AU (1) AU1380801A (fr)
DE (1) DE19947609C1 (fr)
WO (1) WO2001025781A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621410B1 (en) * 1996-08-26 2003-09-16 Rf Code, Inc. System for item and orientation identification
FR2909290A3 (fr) * 2006-12-05 2008-06-06 Renault Sas Dispositif de generation d'un gaz stable a partir d'un liquide contenant une ou plusieurs substances et son utilisation.
FR2909783A1 (fr) * 2006-12-06 2008-06-13 Nat De Metrologie Et D Essais Systeme et procede de generation de melange gazeux pour l'etalonnage d'ethylometres portables
WO2015075197A1 (fr) 2013-11-22 2015-05-28 Degroote Jacques Méthode de marquage chimique de lots de dioxyde de carbone en vue d'en assurer la traçabilité
US20210404995A1 (en) * 2020-06-30 2021-12-30 Entech Instruments Inc. System and Method of Trace-Level Analysis of Chemical Compounds
EP4105655A1 (fr) * 2021-06-16 2022-12-21 Honeywell International Inc. Procédés, appareils et systèmes d'étalonnage d'appareils de détection de gaz

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029717A (en) * 1978-09-08 1980-03-26 Draegerwerk Ag Mixing apparatus for use in calibrating a vapour monitoring device
US4750483A (en) * 1986-01-21 1988-06-14 Gambro Engstrom Ab Device for gasification and dosage
US4904419A (en) * 1989-03-14 1990-02-27 Reynolds Warren D Process and apparatus for vapor transfer of very high purity liquids at high dilution
US5249740A (en) * 1990-11-27 1993-10-05 Assoc. De Gestion De L'ecole Francaise De Papeterie Et D'imprimerie Method for regulating the conditioning of a gas and gas conditioning device
US5431736A (en) * 1992-03-06 1995-07-11 Bronkhorst High-Tech B.V. Method for transforming a liquid flow into a gas flow and a device for implementing the method
EP0684470A2 (fr) * 1990-07-25 1995-11-29 Hitachi, Ltd. Méthode et dispositif pour l'analyse de gaz

Family Cites Families (8)

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US3776023A (en) * 1971-12-22 1973-12-04 Monitor Labs Inc Calibration system for gas analyzers
US4142860A (en) * 1976-06-23 1979-03-06 Mayeaux Donald P Apparatus for producing a calibration sample for analytical instrumentation
DE3216109C2 (de) * 1982-04-30 1985-07-18 Drägerwerk AG, 2400 Lübeck Kalibriergasgenerator
DE3642609C1 (en) * 1986-12-13 1987-07-23 Johnson & Co Gmbh A Method of preparing test gas mixtures containing nitrogen oxides and device for carrying out such a method
GB2237874B (en) * 1989-10-09 1993-08-25 Johan David Raal Preparation of standard gas mixtures
DE4339472C2 (de) * 1993-11-19 1995-10-26 Draegerwerk Ag Vorrichtung zur Erzeugung eines Prüfgases
DE19618268A1 (de) * 1996-05-07 1997-11-13 Linde Ag Verfahren und Vorrichtung zur gravimetrischen Prüfgasherstellung mittels Rückwägung
DE19626749A1 (de) * 1996-07-03 1998-01-08 Linde Ag Verfahren zum Herstellen eines Gasgemisches

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029717A (en) * 1978-09-08 1980-03-26 Draegerwerk Ag Mixing apparatus for use in calibrating a vapour monitoring device
US4750483A (en) * 1986-01-21 1988-06-14 Gambro Engstrom Ab Device for gasification and dosage
US4904419A (en) * 1989-03-14 1990-02-27 Reynolds Warren D Process and apparatus for vapor transfer of very high purity liquids at high dilution
EP0684470A2 (fr) * 1990-07-25 1995-11-29 Hitachi, Ltd. Méthode et dispositif pour l'analyse de gaz
US5249740A (en) * 1990-11-27 1993-10-05 Assoc. De Gestion De L'ecole Francaise De Papeterie Et D'imprimerie Method for regulating the conditioning of a gas and gas conditioning device
US5431736A (en) * 1992-03-06 1995-07-11 Bronkhorst High-Tech B.V. Method for transforming a liquid flow into a gas flow and a device for implementing the method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6621410B1 (en) * 1996-08-26 2003-09-16 Rf Code, Inc. System for item and orientation identification
FR2909290A3 (fr) * 2006-12-05 2008-06-06 Renault Sas Dispositif de generation d'un gaz stable a partir d'un liquide contenant une ou plusieurs substances et son utilisation.
FR2909783A1 (fr) * 2006-12-06 2008-06-13 Nat De Metrologie Et D Essais Systeme et procede de generation de melange gazeux pour l'etalonnage d'ethylometres portables
EP1933218A1 (fr) * 2006-12-06 2008-06-18 Laboratoire National de Metrologie et d'Essais Système et procédé de génération de mélange gazeux pour l'étalonnage d'éthylomètres portables
WO2015075197A1 (fr) 2013-11-22 2015-05-28 Degroote Jacques Méthode de marquage chimique de lots de dioxyde de carbone en vue d'en assurer la traçabilité
US10408808B2 (en) 2013-11-22 2019-09-10 Jacques DEGROOTE Method of chemical marking of batches of carbon dioxide in order to ensure traceability
US20210404995A1 (en) * 2020-06-30 2021-12-30 Entech Instruments Inc. System and Method of Trace-Level Analysis of Chemical Compounds
US11946912B2 (en) * 2020-06-30 2024-04-02 Entech Instruments Inc. System and method of trace-level analysis of chemical compounds
EP4105655A1 (fr) * 2021-06-16 2022-12-21 Honeywell International Inc. Procédés, appareils et systèmes d'étalonnage d'appareils de détection de gaz
US11982658B2 (en) 2021-06-16 2024-05-14 Honeywell International Inc. Methods, apparatuses, and systems for calibrating gas detecting apparatuses

Also Published As

Publication number Publication date
WO2001025781A3 (fr) 2002-02-07
DE19947609C1 (de) 2001-05-03
AU1380801A (en) 2001-05-10

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