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WO2001079809A1 - Procede d'analyse de gaz de mesure - Google Patents

Procede d'analyse de gaz de mesure Download PDF

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Publication number
WO2001079809A1
WO2001079809A1 PCT/EP2001/004246 EP0104246W WO0179809A1 WO 2001079809 A1 WO2001079809 A1 WO 2001079809A1 EP 0104246 W EP0104246 W EP 0104246W WO 0179809 A1 WO0179809 A1 WO 0179809A1
Authority
WO
WIPO (PCT)
Prior art keywords
analyzer
gas
measuring
distributor
measuring points
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.)
Ceased
Application number
PCT/EP2001/004246
Other languages
German (de)
English (en)
Inventor
Dieter Rebhan
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.)
Linde GmbH
Linde Gas AG
Original Assignee
Linde GmbH
Linde Gas AG
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 Linde GmbH, Linde Gas AG filed Critical Linde GmbH
Priority to AU2001263857A priority Critical patent/AU2001263857A1/en
Publication of WO2001079809A1 publication Critical patent/WO2001079809A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0022—General constructional details of gas analysers, e.g. portable test equipment using a number of analysing channels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/26—Devices for withdrawing samples in the gaseous state with provision for intake from several spaces

Definitions

  • the invention relates to a method for analyzing one of a plurality of gas streams which are detected at a plurality of measuring points, the gas stream to be analyzed being passed from the measuring point to an analyzer, and a device for analyzing one of a plurality of gas streams with a plurality of measuring points for each detection of a gas stream, in each case one measuring line from each of the measuring points to an analyzer and a P ⁇ mar pump to demand gas from the measuring points via the measuring lines to the analyzer
  • the atmospheric oxygen has a negative effect on the quality of the paint layer, since the oxygen reacts with the paint surface and slows down or even prevents the curing process.
  • the radiation curing is therefore usually carried out in an inert gas atmosphere, usually in an atmosphere of pure
  • the concentration of oxygen in the hardening zone should be kept in a range of approximately 200 to 1000 ppm
  • a single analyzer is used for several measuring points, whereby the individual measuring points are connected to the analyzer via measuring lines, some of which are several meters long.
  • the dead times when switching between two measuring points represent a major problem Oxygen concentration are determined at different measuring points, after the gas atmosphere at the first measuring point has been analyzed, the line between the first measuring point and the analyzer is closed and the line between the new measuring point and the analyzer is opened. Due to the long line between the measuring point and the analyzer, relatively long pumping times are required until a gas concentration representative of the new measuring point is established on the analyzer. A quick switch between different measuring points is therefore at the expense of the quality of the measurement result.
  • the object of the present invention is to develop a method and a device which make it possible to analyze a plurality of gas flows in succession, it being possible to switch quickly between the analyzes of the individual gas flows.
  • the device according to the invention is characterized in that a plurality of measuring points for detecting a gas flow, a measuring line from each of the measuring points to an analyzer and a primary pump for conveying gas from the measuring points via the measuring lines to the analyzer are provided, with each measuring line branches off a suction line, wherein all suction lines open into a manifold in which a secondary pump is provided, and that a valve is arranged in each suction line and in each measuring line downstream of the branch to the respective suction line.
  • a distributor is understood to be a device which allows each of the gas streams to either be directed to the analyzer or via a different line dissipate.
  • the distributor therefore has at least one branch for each measuring line.
  • the device according to the invention has a secondary pump, with which measuring gas is pumped to the distributor continuously and simultaneously from all measuring points which are examined with the aid of the analyzer.
  • the sample gas from the various measuring points is brought together in a manifold after the distributor and drawn off, generally conveyed to the outside as exhaust gas. If the gas atmosphere is to be analyzed at one of the measuring points, the gas stream coming from this measuring point is not passed on to the collecting line, but is led directly from the distributor to the analyzer. To switch to another measuring point, the previous gas flow to the analyzer is interrupted and instead led into the collecting line and the gas flow now to be analyzed is diverted from the distributor to the analyzer.
  • the analyzer is located in close proximity to the manifold, i.e. that the line lengths between the distributor and the analyzer are minimized and particularly preferably such that the flow paths between the distributor and the analyzer are the same for the gas streams obtained at the individual measuring points.
  • the distributor Since the distributor is constantly supplied with gas from all measuring points, the gas to be analyzed only has to be conveyed from the distributor to the analyzer and not from the respective measuring point to the analyzer. Even with several measuring points spaced far apart, which means that the analyzer cannot necessarily be arranged in the immediate vicinity of all measuring points, it is possible to keep the dead times when switching between different measuring points small.
  • the gas stream to be analyzed is conducted from the distributor to the analyzer. A part of this gas flow can also be drawn off with the remaining gas flows. However, the entire gas stream to be analyzed is preferably fed to the analyzer, since this improves the quality of the analysis.
  • a P ⁇ mar pump is preferably provided, which is arranged downstream or upstream of the analyzer. The P ⁇ mar pump is particularly preferably located downstream of the analyzer, since in this way the gas to be analyzed may be entrained by the P ⁇ mar pump Impurities do not adversely affect the analyzer
  • the single figure shows schematically a device for analyzing the gas atmosphere in a jet hardening system of a paint shop
  • the paints are irradiated with UV lamps 1a, 1 b, 1c, 1d, which initiates radical chain polymerization, which leads to curing of the paint.
  • UV lamps 1a, 1 b, 1c, 1d which initiates radical chain polymerization, which leads to curing of the paint.
  • the quality of paints hardened in this way is influenced by the presence of oxygen during the Hardening process severely impaired Therefore the hardening zone is mertertised with nitrogen gas and the oxygen concentration in the hardening zone is monitored
  • measuring points 2a, 2b, 2c, 2d are arranged in the immediate vicinity of each UV lamp 1a, 1b, 1c, d.
  • gas from the surroundings of the respective UV lamp 1a, 1b, 1c, 1d removed and fed via a measuring line 3a, 3b, 3c, 3d to a distributor 4.
  • the measuring lines 3a, 3b, 3c, 3d have different and sometimes considerable lengths depending on the arrangement of the measuring points 2a, 2b, 2c, 2d
  • the distributor 4 branch off from the measuring lines 3a, 3b, 3c, 3d suction lines 5a, 5b, 5c, 5d, which lead to a common collecting line 6, in which there is a secondary pump 7.
  • the collecting line 6 leads downstream of the
  • the flow connections between the measuring lines 3 and the collecting line 6 can be interrupted by valves 8a, 8b, 8c, 8d, which are provided in each of the suction lines 5
  • the measuring lines 3 are merged downstream of the branches of the suction lines 5 into a collecting line 9, in which a primary pump 10 and an oxygen analyzer 11 are arranged.
  • the primary pump 10 can be arranged both downstream and upstream of the analyzer 11, and in the case of sensitive measurements the primary pump is preferably provided downstream of the analyzer 11 in order to keep contaminants, such as traces of oil, that may escape from the pump 10 away from the analyzer.
  • the measuring lines 3 can be closed between the respective branches in the suction lines 5 and the connection to the collecting line 9 by means of the valves 12a, 12b, 12c, 12d.
  • the line lengths between the distributor 4 and the analyzer 11 are kept as short as possible.
  • valves 8 are first opened and the valves 12 are closed.
  • the secondary pump 7 sucks gas permanently from the measuring points 2 via the measuring lines 3, the suction lines 5 and the collecting line 6 and conveys the gas mixture forming in the collecting line 6 to the outside.
  • the distributor 4 located in the immediate vicinity of the analyzer 11 is constantly provided with measuring gas from all measuring points 2.
  • the valve 8a is closed and the connection to the secondary pump 7 is interrupted.
  • the valve 12a is opened simultaneously or with a slight time delay.
  • the analyzer 11 is supplied with the gas to be analyzed from the measuring point 1a in a short way.
  • valve 12a When switching to another measuring point, for example measuring point 1c, valve 12a is first closed and valve 8a opened. Due to the short line lengths between the distributor 4 and the analyzer 11, the gas in the line between the valve 12 a and the analyzer 11 is drawn off by the primary pump 10 in a very short time. The subsequent analysis is therefore not affected by the previous measurement. By closing the valve 8a, the gas supply from the measuring point 1a to the distributor 4 is maintained again by the secondary pump 7. The valves 8c are then closed and 12c opened, whereby the analyzer 11 is now supplied with gas from the measuring point 2c for analysis.
  • the control of the sample gas switchover is preferably carried out by the usually existing data processing system, for example a PLC control.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un procédé d'analyse d'un ou plusieurs flux de gaz relevés sur plusieurs points de mesure, le flux de gaz à analyser du point de mesure étant guidé vers un analyseur. Tous les flux de gaz des points de mesure (2a, b, c, d) sont alimentés dans un répartiteur (4), seul le flux de gaz à analyser étant acheminé vers l'analyseur (11) par le répartiteur (4). Les flux de gaz restants sont retirés du répartiteur (4).
PCT/EP2001/004246 2000-04-17 2001-04-12 Procede d'analyse de gaz de mesure Ceased WO2001079809A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001263857A AU2001263857A1 (en) 2000-04-17 2001-04-12 Method for analysing measured gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000118991 DE10018991A1 (de) 2000-04-17 2000-04-17 Verfahren zur Meßgasanalyse
DE10018991.1 2000-04-17

Publications (1)

Publication Number Publication Date
WO2001079809A1 true WO2001079809A1 (fr) 2001-10-25

Family

ID=7639044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/004246 Ceased WO2001079809A1 (fr) 2000-04-17 2001-04-12 Procede d'analyse de gaz de mesure

Country Status (3)

Country Link
AU (1) AU2001263857A1 (fr)
DE (1) DE10018991A1 (fr)
WO (1) WO2001079809A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105675820A (zh) * 2016-02-04 2016-06-15 大唐环境产业集团股份有限公司 一种烟气成分测量方法及系统
FR3081558A1 (fr) * 2018-05-28 2019-11-29 Pfeiffer Vacuum Station et procede de mesure de la contamination moleculaire vehiculee par l'air
WO2020160910A1 (fr) * 2019-02-05 2020-08-13 Pfeiffer Vacuum Procédé de réglage d'une station de mesure de la contamination moléculaire véhiculée par l'air et station de mesure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10164293A1 (de) 2001-12-28 2003-07-10 Wagner Alarm Sicherung Verfahren und Vorrichtung zum Messen des Sauerstoffgehaltes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090392A (en) * 1977-08-01 1978-05-23 Ethyl Corporation Automatic gas analyzer system
EP0476674A1 (fr) * 1990-09-20 1992-03-25 Decisions Investments Corp. Système d'échantillonnage et d'analyse d'air
US5293771A (en) * 1992-09-01 1994-03-15 Ridenour Ralph Gaylord Gas leak sensor system
EP0965831A1 (fr) * 1998-06-15 1999-12-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Installation d'analyse d'atmosphere

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090392A (en) * 1977-08-01 1978-05-23 Ethyl Corporation Automatic gas analyzer system
EP0476674A1 (fr) * 1990-09-20 1992-03-25 Decisions Investments Corp. Système d'échantillonnage et d'analyse d'air
US5293771A (en) * 1992-09-01 1994-03-15 Ridenour Ralph Gaylord Gas leak sensor system
EP0965831A1 (fr) * 1998-06-15 1999-12-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Installation d'analyse d'atmosphere

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105675820A (zh) * 2016-02-04 2016-06-15 大唐环境产业集团股份有限公司 一种烟气成分测量方法及系统
FR3081558A1 (fr) * 2018-05-28 2019-11-29 Pfeiffer Vacuum Station et procede de mesure de la contamination moleculaire vehiculee par l'air
WO2019228844A1 (fr) * 2018-05-28 2019-12-05 Pfeiffer Vacuum Station et procédé de mesure de la contamination moléculaire véhiculée par l'air
CN112219101A (zh) * 2018-05-28 2021-01-12 普发真空公司 用于测量由空气传播的分子污染物的站和方法
KR20210014682A (ko) * 2018-05-28 2021-02-09 파이퍼 배큠 공기 중 분자 오염을 측정하기 위한 스테이션 및 방법
US11768134B2 (en) 2018-05-28 2023-09-26 Pfeiffer Vacuum Station and method for measuring airborne molecular contamination
KR102740076B1 (ko) 2018-05-28 2024-12-06 파이퍼 배큠 공기 중 분자 오염을 측정하기 위한 스테이션 및 방법
CN112219101B (zh) * 2018-05-28 2025-01-10 普发真空公司 用于测量由空气传播的分子污染物的站和方法
WO2020160910A1 (fr) * 2019-02-05 2020-08-13 Pfeiffer Vacuum Procédé de réglage d'une station de mesure de la contamination moléculaire véhiculée par l'air et station de mesure
US11953484B2 (en) 2019-02-05 2024-04-09 Pfeiffer Vacuum Method for setting an airborne molecular contamination measurement station, and measurement station

Also Published As

Publication number Publication date
DE10018991A1 (de) 2001-10-18
AU2001263857A1 (en) 2001-10-30

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