DE10138535B4 - Gas analyzer - Google Patents
Gas analyzer Download PDFInfo
- Publication number
- DE10138535B4 DE10138535B4 DE2001138535 DE10138535A DE10138535B4 DE 10138535 B4 DE10138535 B4 DE 10138535B4 DE 2001138535 DE2001138535 DE 2001138535 DE 10138535 A DE10138535 A DE 10138535A DE 10138535 B4 DE10138535 B4 DE 10138535B4
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- DE
- Germany
- Prior art keywords
- gas
- reference gas
- branch
- sample
- flow
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
-
- 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
- G01N33/0011—Sample conditioning
- G01N33/0018—Sample conditioning by diluting a gas
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Gasanalysengerät (1) mit einem an einer Messgaszufuhr (7) und an einer Referenzgaszufuhr (8) angeschlossenen Analysenteil (9), in dem das zugeführte Messgas und das Referenzgas zusammenströmen und nach der Analyse über eine Gasabfuhr (10) abströmen, wobei die Referenzgaszufuhr (8) einen Gasabzweig (11) mit einer Abströmdrossel (12) für überschüssiges Referenzgas aufweist und zwischen dem Gasabzweig (11) und dem Analysenteil (9) einen Strömungswiderstand (13) enthält, dadurch gekennzeichnet, dass der Gasabzweig (11) mit der Abströmdrossel (12) ausgangsseitig in die Gasabfuhr (10) des Analysenteils (9) mündet.Gas analyzer (1) with one at a sample gas supply (7) and at a reference gas supply (8) connected analysis part (9), in which the supplied sample gas and the reference gas converge and after the analysis about a gas discharge (10) outflow, wherein the reference gas supply (8) has a gas branch (11) with an outflow throttle (12) for excess reference gas and between the gas branch (11) and the analysis part (9) a flow resistance (13) contains characterized in that the gas branch (11) with the outflow throttle (12) on the output side in the gas discharge (10) of the analysis part (9) empties.
Description
Die Erfindung betrifft ein Gasanalysengerät mit einem an einer Messgaszufuhr und an einer Referenzgaszufuhr angeschlossenen Analysenteil, in dem das zugeführte Messgas und das Referenzgas zusammenströmen und nach der Analyse über eine Gasabfuhr abströmen, wobei die Referenzgaszufuhr einen Gasabzweig mit einer Abströmdrossel für überschüssiges Referenzgas aufweist und zwischen dem Gasabzweig und dem Analysenteil einen Strömungswiderstand enthält.The The invention relates to a gas analyzer with a at a sample gas supply and an analysis part connected to a reference gas supply, in which the supplied Sample gas and the reference gas flow together and after analysis via a gas discharge flow out, wherein the reference gas supply a gas branch with a flow restrictor for excess reference gas and between the gas branch and the analysis part a flow resistance contains.
Ein solches Gasanalysengerät ist aus dem Siemens-Katalog "OXYMAT 6, Gasanalysengeräte für die Bestimmung von Sauerstoff", November 1998, Bestell-Nr: E86060-K3510-B101-A1 bekannt (siehe auch http://www.prozessanalytik.de/00/produkte/kataloge/gas/kat_de.htm).One such gas analyzer is from the Siemens catalog "OXYMAT 6, Gas analyzers for determination of oxygen ", November 1998, Order No: E86060-K3510-B101-A1 (see also http://www.prozessanalytik.de/00/produkte/kataloge/gas/kat_de.htm).
Bei dem bekannten Gasanalysengerät gelangen über eine Messgaszufuhr ein Messgas, dessen Sauerstoffgehalt zu bestimmen ist, und über eine Referenzgaszufuhr ein Referenzgas in ein Analysenteil, wo beide Gase in einem inhomogenen Magnetfeld zusammengeführt werden. Da Sauerstoffmoleküle aufgrund ihrer paramagnetischen Eigenschaften in dem inhomogenen Magnetfeld in Richtung höherer Feldstärken bewegt werden, entsteht zwischen dem Messgas und dem Referenzgas ein Druckunterschied, der gemessen wird. Durch einen zweikanaligen, symmetrischen Aufbau der Referenzgaszufuhr in das Analysenteil wird erreicht, dass das Messergebnis prinzipiell unabhängig von Schwankungen des Referenzgasstromes ist; jedoch ist das Einhalten eines Mindestvolumenstromes des Referenzgases für die Messfähigkeit des Analysengerätes erforderlich. Die Referenzgasversorgung des Analysengeräts erfolgt unter Druck, beispielsweise mittels einer Referenzgaspumpe, wobei der Referenzgasstrom durch den Strömungswiderstand in der Referenzgaszufuhr und die Differenz der Drücke beiderseits des Strö mungswiderstandes bestimmt ist. Bei zu hohem Referenzgasdruck wird vor dem Strömungswiderstand über einen Gasabzweig mit Abströmdrossel überschüssiges Referenzgas nach außen abgeleitet, so dass der Eingangsdruck vor dem Strömungswiderstand sinkt.at the known gas analyzer get over a sample gas feed a sample gas to determine its oxygen content is, and over a reference gas feed a reference gas into an analyzer section where both Gases are merged in an inhomogeneous magnetic field. Because oxygen molecules due their paramagnetic properties in the inhomogeneous magnetic field moved in the direction of higher field strengths be, arises between the sample gas and the reference gas, a pressure difference, which is measured. Due to a two-channel, symmetrical structure the reference gas feed into the analyzer section is achieved that the Measurement result basically independent of fluctuations of the reference gas flow; however, keeping one is Minimum volume flow of the reference gas required for the measuring capability of the analyzer. The reference gas supply of the analyzer is carried out under pressure, for example by means of a reference gas pump, wherein the reference gas flow through the flow resistance in the reference gas supply and the difference in pressures on both sides the flow resistance is determined. If the reference gas pressure is too high, before the flow resistance over a Gas branch with outflow restrictor Excess reference gas outward derived, so that the inlet pressure before the flow resistance sinks.
Im Hinblick darauf, dass auch Druckschwankungen des Messgases die Druckverhältnisse an dem Strömungswiderstand und damit den Referenzgasstrom beeinflussen, liegt der Erfindung die Aufgabe zugrunde, die Messfähigkeit des bekannten Analysengerätes noch weiter zu verbessern.in the Considering that also pressure fluctuations of the measuring gas, the pressure conditions at the flow resistance and thus influence the reference gas flow, the invention the task is based on the measuring capability the known analyzer even further to improve.
Gemäß der Erfindung wird die Aufgabe dadurch gelöst, dass bei dem Gasanalysator der eingangs angegebenen Art der Gasabzweig mit der Abströmdrossel ausgangsseitig in die Gasabfuhr des Analysenteils mündet. Da das Messgas und das Referenzgas in dem Analysenteil zusammenströmen und dieses anschließend über die Gasabfuhr verlassen, sind der Druck in der Gasabfuhr, der Druck am Ende des Strömungswiderstands und der Messgasdruck hinter dem Strömungswiderstand im Wesentlichen gleich. Steigt oder fällt der Messgasdruck, so strömt weniger bzw. mehr überschüssiges Referenzgas durch den Gasabzweig, so dass der Druck vor der Abströmdrossel ansteigt oder abfällt und der Volumenstrom des dem Analysenteil zugeführten Referenzgases aufgrund der konstanten Druckdifferenz über dem Strömungswiderstand des Referenzgasweges im Wesentlichen konstant bleibt.According to the invention the task is solved by that in the gas analyzer of the type specified in the gas branch with the outflow throttle On the output side opens into the gas discharge of the analysis part. There the sample gas and the reference gas converge in the analysis part and this afterwards over the Leave gas discharge, the pressure in the gas discharge, the pressure at the end of the flow resistance and the sample gas pressure behind the flow resistance substantially equal. Rises or falls the sample gas pressure, so flows less or more excess reference gas through the gas branch, so that the pressure upstream of the outflow throttle rises or falls and the flow rate of the reference gas supplied to the analysis part due the constant pressure difference over the flow resistance the reference gas path remains substantially constant.
Zur weiteren Erläuterung der Erfindung wird im Folgenden auf die Figur der Zeichnung Bezug genommen, die ein Ausführungsbeispiel des erfindungsgemäßen Gasanalysegeräts zeigt.to further explanation The invention is hereinafter referred to the figure of the drawing taken, which is an embodiment of the gas analyzer according to the invention shows.
Das
Gasanalysengerät
Der
Referenzgasstrom in der Referenzgaszufuhr
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001138535 DE10138535B4 (en) | 2001-08-06 | 2001-08-06 | Gas analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001138535 DE10138535B4 (en) | 2001-08-06 | 2001-08-06 | Gas analyzer |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10138535A1 DE10138535A1 (en) | 2003-03-06 |
DE10138535B4 true DE10138535B4 (en) | 2007-02-15 |
Family
ID=7694542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2001138535 Expired - Fee Related DE10138535B4 (en) | 2001-08-06 | 2001-08-06 | Gas analyzer |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10138535B4 (en) |
-
2001
- 2001-08-06 DE DE2001138535 patent/DE10138535B4/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
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OXYMAT 6 Gasanalysengeräte für die Bestimmung von Sauerstoff Nov. 1998 Best.Nr. E86060-K 3510- B101-A1 * |
Also Published As
Publication number | Publication date |
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DE10138535A1 (en) | 2003-03-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20150303 |