WO1995020755A1 - Analyseur d´oxygene - Google Patents
Analyseur d´oxygene Download PDFInfo
- Publication number
- WO1995020755A1 WO1995020755A1 PCT/JP1994/000102 JP9400102W WO9520755A1 WO 1995020755 A1 WO1995020755 A1 WO 1995020755A1 JP 9400102 W JP9400102 W JP 9400102W WO 9520755 A1 WO9520755 A1 WO 9520755A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oxygen
- gas
- detector
- measurement
- pipe
- Prior art date
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000001301 oxygen Substances 0.000 title claims abstract description 100
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 100
- 239000007789 gas Substances 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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
- G01N33/0011—Sample conditioning
Definitions
- the present invention relates to an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen.
- a trace amount of oxygen refers to an amount having a concentration of about 1 P Pm or less. Disclosure of the invention
- the oxygen analyzer according to the present invention is suitable for oxygen analysis of a gas containing a small amount of oxygen, and includes a bypass pipe connecting a gas supply pipe to a detector and a gas outlet pipe, and a halfway of the bypass pipe.
- This is an oxygen analyzer with various improvements, such as a check valve provided, and a means for detecting a pressure difference between the gas supply pipe and the gas outlet pipe.
- the oxygen analyzer of the present invention is of a Hershey type galvanic cell type, and has an aqueous solution (electrolyte) within a specific concentration range inside the detector. I have. Further, a measuring gas, a zero gas, and a gas for gain can be supplied to the detector, and the supplied gas can be switched by means such as a valve.
- Various parts and means of a known oxygen analyzer can be applied to the parts not specified in this specification. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a diagram showing a conventional oxygen analyzer without a bypass line.
- FIG. 2 is a diagram showing an oxygen analyzer of the present invention having a bypass line.
- FIG. 3 is a diagram showing a line configuration and a valve configuration used for line switching in a conventional analyzer. '
- FIG. 4 is a diagram showing a configuration when a collective valve is used.
- FIG. 5 is a diagram of an oxygen analyzer having an automatic water replenishing device and a device for purging a water tank with exhaust gas from a detector.
- the invention according to claim 1 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, comprising: a bypass pipe connecting a gas supply pipe to a detector and a gas outlet pipe; And a means for detecting a pressure difference between the gas supply pipe and the gas outlet pipe.
- the present inventor has invented the oxygen analyzer described above in order to solve such a problem.
- Figure 2 shows the configuration.
- the pressure difference detection means detects the pressure difference between the inlet and outlet sides of the detector, and when this exceeds a predetermined amount, opens the check valve to reduce the pressure of both. This is to equalize the pressure.
- the check ring is provided on the bypass line between the inlet and the outlet of the detector, the measurement gas does not pass through the check ring during normal measurement, and therefore, the above-described problem of deterioration of responsiveness. It does not cause harm.
- a flow sensor can be used in addition to the pressure sensor, and means capable of directly and indirectly detecting the pressure difference can be used.
- the invention according to claim 2 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein the oxygen analyzer has valves in both a gas supply pipe to the detector and a gas outlet pipe, and when the supply of gas is stopped,
- the present invention relates to an oxygen analyzer characterized by having a control circuit for closing a valve of a supply pipe immediately after closing a valve of an outlet pipe and resuming gas supply, and sometimes opening a supply pipe after opening an outlet pipe.
- the invention according to claim 3 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein a switching valve for supplying a measurement gas to a purifier or a detector, and a stop valve are integrally formed.
- the present invention relates to an oxygen analyzer characterized by using a processed collective valve.
- FIG. 3 shows the line structure of a conventional analyzer and the configuration of the valve used for line switching.
- FIG. 4 shows a configuration in which a collective valve is used in the analyzer according to the present invention.
- A is the detection gas inlet
- B is the detection gas outlet
- C is the purifier inlet
- D is the purifier outlet
- E is the detector inlet
- F is the detector outlet. Is a pipe that connects
- the invention according to claim 4 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, comprising a liquid level detector of a detector and a water tank outlet valve interlocked therewith, wherein the liquid level is
- the present invention relates to an oxygen analyzer which automatically replenishes water to a predetermined level when the water level falls below a predetermined level.
- the electrolyte level in the detector gradually drops due to the gradual evaporation of water from the electrolyte in the detector during the measurement. Therefore, it is necessary to supply water during the long-term measurement.
- the oxygen analyzer according to the present invention artificial water is prevented when replenishing water, and water is automatically replenished as appropriate even in the case of unmanned operation such as at night, so that water is automatically supplied in order to guarantee optimal analysis conditions. It provides an analyzer for replenishment.
- the invention according to claim 5 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein the water in the water tank is brought into contact with the measurement gas, the exhaust gas from the detector, or the oxygen-free gas.
- the present invention relates to an oxygen analyzer characterized by removing dissolved oxygen in water to be replenished.
- the invention according to claim 6 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein the water supply pipe from the water tank to the detector is made of an oxygen-impermeable material. Oxygen analyzer.
- the inventions of claims 5 and 6 both aim to prevent measurement results from being affected by dissolved oxygen contained in the water to be replenished.
- oxygen contained in the water in the tank is removed by removing dissolved oxygen contained in the water in the tank and preventing dissolution of oxygen in the air through the water supply pipe.
- the analysis results are also affected by the oxygen contained in the water supplied to the detector.
- the measurement gas, the exhaust gas from the detector, or the oxygen-free gas is introduced into the water tank, and the gas in the tank is supplied by means such as publishing. Contact water and gas to remove dissolved oxygen in water.
- a metal is preferably used as the oxygen impermeable material used in the invention of claim 6, a metal is preferably used.
- Fig. 5 shows an example of an analyzer according to claims 4 to 6.
- the greeting device is provided with a liquid level detection sensor, and a valve in conjunction with the sensor is provided in the middle of the pipe that supplies water from the water tank to the detector.
- the dotted lines in FIG. 5 indicate the supply lines of the measurement gas, the exhaust gas from the detector, and the oxygen-free gas to the water tank, respectively.
- the invention according to claim 7 is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein the zero point adjustment and the gain adjustment are automatically performed by the following operation procedure.
- the analyzer is an oxygen analyzer suitable for oxygen analysis of a gas containing a trace amount of oxygen, wherein the zero point adjustment and the gain adjustment are automatically performed by the following operation procedure.
- the zero gas obtained by removing oxygen in the measurement gas by the purifier is supplied to the detector for measurement, and the difference between the maximum value and the minimum value of the detected value within a certain period of time is the predetermined amount of full scale. Perform the measurement until the following, and perform the zero adjustment, and
- the present invention relates to an oxygen analyzer that performs measurement until the measured value becomes equal to or less than a predetermined amount of a full scale and automatically performs a gain adjustment operation.
- the device of the present invention there is no control circuit that can automatically perform zero point adjustment and gain adjustment as in the present invention.Introduction and switching of gas are performed manually. Was manually adjusted to the value. As a result, there were individual errors in confirming the stability and adjusting the values, and there were variations in the adjustment.
- the problem of the present invention is solved by the device of the present invention, and more reliable data can be obtained.
- the above-mentioned “constant time” for making a judgment on the detected value is a force that can be arbitrarily determined as desired. ;, Typically about 15 minutes.
- the “predetermined amount of full scale” for determining stability can be arbitrarily determined, but is generally about ⁇ 5 to 0.25%.
- zero gas is supplied to the detector and measurement is performed, and the difference between the maximum value and the minimum value is calculated for the measurement value for 15 minutes, and the difference is calculated as the full-scale soil value. If it is within 5%, it is determined that it is stable.If the value is not zero, it is corrected and the zero point adjustment is completed. is there.
- the operating procedure for gain adjustment is basically the same as the operating procedure for zero point adjustment.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1994/000102 WO1995020755A1 (fr) | 1994-01-26 | 1994-01-26 | Analyseur d´oxygene |
DE69433017T DE69433017D1 (de) | 1994-01-26 | 1994-01-26 | Sauerstoff-Analysator |
US08/682,607 US6024922A (en) | 1994-01-26 | 1994-01-26 | Method of controlling an oxygen analyzer of the Hersch galvanic type |
EP94905208A EP0744612B1 (en) | 1994-01-26 | 1994-01-26 | Oxygen analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1994/000102 WO1995020755A1 (fr) | 1994-01-26 | 1994-01-26 | Analyseur d´oxygene |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995020755A1 true WO1995020755A1 (fr) | 1995-08-03 |
Family
ID=14098151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000102 WO1995020755A1 (fr) | 1994-01-26 | 1994-01-26 | Analyseur d´oxygene |
Country Status (4)
Country | Link |
---|---|
US (1) | US6024922A (ja) |
EP (1) | EP0744612B1 (ja) |
DE (1) | DE69433017D1 (ja) |
WO (1) | WO1995020755A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102788826A (zh) * | 2012-08-27 | 2012-11-21 | 袁万德 | 一种原电池式微量氧分析仪 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5390021A (en) * | 1977-01-19 | 1978-08-08 | Matsushita Electric Works Ltd | Rotary change over valve |
JPS6124932U (ja) * | 1984-07-19 | 1986-02-14 | 繁雄 有馬 | 簡単に取替えできる温度感知器 |
JPS6455446U (ja) * | 1987-10-02 | 1989-04-05 | ||
JPH05180733A (ja) * | 1990-10-02 | 1993-07-23 | L'air Liquide | 超高精度分析装置へのガス供給方法及び装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3698384A (en) * | 1970-11-03 | 1972-10-17 | Westinghouse Electric Corp | Oxygen consumption rate monitor |
US3933593A (en) * | 1971-02-22 | 1976-01-20 | Beckman Instruments, Inc. | Rate sensing batch analysis method |
US3760831A (en) * | 1971-11-01 | 1973-09-25 | Ford Motor Co | Gas flow control system for an analytical instrument |
EP0047434A1 (de) * | 1980-09-05 | 1982-03-17 | BROWN, BOVERI & CIE Aktiengesellschaft | Elektrochemische Messvorrichtung |
DE3047181A1 (de) * | 1980-12-15 | 1982-06-16 | Hoechst Ag, 6000 Frankfurt | Kunststoffrohr mit sauerstoffdichter ummantelung |
DE3412166A1 (de) * | 1984-03-31 | 1985-10-10 | Pierburg Gmbh & Co Kg, 4040 Neuss | Verfahren und vorrichtung zum bestimmen des kraftstoffluftverhaeltnisses von ottomotoren |
US4620918A (en) * | 1985-05-03 | 1986-11-04 | Bukamier Gary L | Selective sensor construction |
JP2799885B2 (ja) * | 1989-08-28 | 1998-09-21 | 日本酸素株式会社 | 微量酸素測定方法及びその装置 |
US4973395A (en) * | 1989-11-17 | 1990-11-27 | Modern Controls, Inc. | Humidified high sensitivity oxygen detector |
GB2251690A (en) * | 1990-11-05 | 1992-07-15 | Rodney Whitham | Optical liquid level detector |
-
1994
- 1994-01-26 US US08/682,607 patent/US6024922A/en not_active Expired - Lifetime
- 1994-01-26 EP EP94905208A patent/EP0744612B1/en not_active Expired - Lifetime
- 1994-01-26 DE DE69433017T patent/DE69433017D1/de not_active Expired - Lifetime
- 1994-01-26 WO PCT/JP1994/000102 patent/WO1995020755A1/ja active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5390021A (en) * | 1977-01-19 | 1978-08-08 | Matsushita Electric Works Ltd | Rotary change over valve |
JPS6124932U (ja) * | 1984-07-19 | 1986-02-14 | 繁雄 有馬 | 簡単に取替えできる温度感知器 |
JPS6455446U (ja) * | 1987-10-02 | 1989-04-05 | ||
JPH05180733A (ja) * | 1990-10-02 | 1993-07-23 | L'air Liquide | 超高精度分析装置へのガス供給方法及び装置 |
Non-Patent Citations (1)
Title |
---|
SHOTARO OKA: "Industrial Gas Analyzation", KYORITSU SHUPPAN, 1 November 1966 (1966-11-01), (TOKYO), pages 108 - 117 AND 330 - 336 * |
Also Published As
Publication number | Publication date |
---|---|
EP0744612A4 (en) | 1997-04-23 |
EP0744612A1 (en) | 1996-11-27 |
US6024922A (en) | 2000-02-15 |
EP0744612B1 (en) | 2003-08-06 |
DE69433017D1 (de) | 2003-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI249571B (en) | Process and chemical mixing system for making a slurry having solids content with any qualification range | |
TW500628B (en) | Method and apparatus for producing a liquid mixture | |
KR0119116B1 (ko) | 현상액 관리장치 | |
US20070254374A1 (en) | Water quality analyzer | |
Rieger et al. | In-situ measurement of ammonium and nitrate in the activated sludge process | |
WO1995020755A1 (fr) | Analyseur d´oxygene | |
CN114689574A (zh) | 一种水中全范围铁含量在线检测装置及方法 | |
JPH117324A (ja) | 希薄溶液の製造方法および装置 | |
JPH10170501A (ja) | 水質測定装置及び水質測定方法 | |
JP2004033800A (ja) | 残留塩素濃度の管理方法、超純水の製造方法および注入塩素濃度の管理方法 | |
JPH0650856A (ja) | 酸素分析計 | |
JP2008107244A (ja) | 連続式全有機炭素濃度測定方法及びその装置 | |
Thomsen et al. | N and P on-line meters: requirements, maintenance and stability | |
CN212532319U (zh) | 一种外置的智能水质勾兑系统 | |
JP2701760B2 (ja) | 薬液組成モニタ装置 | |
US20210033590A1 (en) | Method for determining a chemical intake capacity of a process medium in a measuring point and measuring point for determining a chemical intake capacity of a process medium | |
JP2010160169A (ja) | 異常水質検出装置及び異常水質検出方法 | |
JPH08136451A (ja) | 薬液組成モニタ方法およびその装置 | |
JP2001124692A (ja) | 微粒子計測装置 | |
JPH06265464A (ja) | 腐蝕試験装置 | |
CN222024227U (zh) | 一种用于激光粒度仪的恒温净水装置 | |
JPH07146287A (ja) | 水質監視装置 | |
JPH11118680A (ja) | サンプル希釈分析装置 | |
JPH0351754A (ja) | フッ素濃度測定方法及びフッ素濃度測定装置 | |
JPH1054802A (ja) | 薬液組成モニタ方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 08682607 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1994905208 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1994905208 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1994905208 Country of ref document: EP |