CN103134903A - Atmosphere hydrogen concentration detector based on injection principle - Google Patents
Atmosphere hydrogen concentration detector based on injection principle Download PDFInfo
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- CN103134903A CN103134903A CN2011103902136A CN201110390213A CN103134903A CN 103134903 A CN103134903 A CN 103134903A CN 2011103902136 A CN2011103902136 A CN 2011103902136A CN 201110390213 A CN201110390213 A CN 201110390213A CN 103134903 A CN103134903 A CN 103134903A
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Abstract
The invention provides an atmosphere hydrogen concentration detector based on an injection principle. The atmosphere hydrogen concentration detector based on the injection principle comprises equipment of a sampling gas inlet tube, a sampling regulating valve, a sampling flowmeter, a carrier gas inlet tube, a pressure-reducing valve, a carrier gas regulating valve, a carrier gas flowmeter, an injector, a hydrogen concentration sensor, a gas outlet tube, and the like. The gas inlet tube is separated into two ways, wherein one way is the sampling gas inlet tube of detected combination gas, and the other way is the carrier gas inlet tube. An outlet of the injector is connected with the hydrogen sensor, and then is connected with an outlet pipeline to discharge gas outside. Indicating values of the sampling flowmeter, the carrier gas flowmeter, and the hydrogen sensor are respectively read, hydrogen content in to-be-detected gas is calculated by utilizing the three indicating values. The atmosphere hydrogen concentration detector based on the injection principle can safely and reliably detect hydrogen concentration in a surrounding.
Description
Technical field
The invention belongs to Hydrogen Energy safe utilization technical field, this pick-up unit is used for the safety monitoring of hydrogen, near the atmospheric environment density of hydrogen of liquid hydrogen system, to guarantee system running environment safety.
Background technology
Countries in the world are paid close attention to the exploitation of new forms of energy one after another in recent years, and wherein Hydrogen Energy is with its cleaning, the plurality of advantages such as pollution-free, efficient is high and favored.Low due to hydrogen ignition energy in air, explosive range is wide, hydrogen gas leakage has larger danger in air, so it is the necessary means of the judgement system failure that the hydrogen concentration monitoring is carried out at the position of may generating hydrogen leaking, so research safety, reliable and highly sensitive hydrogen concentration monitoring means have great importance.
At present, use the hydrogen sensor of the hydrogen concentration monitoring of comparative maturity to mainly contain electrochemical sensor, metal nano line sensor and conductor oxidate sensor in system.Yet electrical property change mainly occurs in hydrogen environment based on material these sensors monitors, in the course of the work may discharge generation spark, thereby just there is potential safety hazard in the situation lower sensor itself that hydrogen gathers in air.In addition, generally hydrogen environment (percent by volume is less than or equal to the 2%) medium sensitivity at low concentration is higher due to these sensors, and higher hydrogen concentration easily makes Sensor Poisoning and is difficult for regeneration.
The present invention consider to adopt injector take a sample and diluent air in hydrogen, then deliver to sensor and carry out concentration monitor, to improve the safety and reliability of observation process.
Summary of the invention
The present invention is hydrogen concentration detection means in a cover air, comprise that it comprises the equipment such as sampling draft tube, sampling variable valve, sample flow meter, carrier gas draft tube, reduction valve, carrier gas variable valve, carrier gas flux meter, injector, hydrogen concentration sensor, escape pipe, as shown in the figure.Draft tube is divided into two-way, and wherein one the tunnel for being detected the sampling draft tube of hydrogen/air combination gas, pipeline setting from need detect the position, access injector working chamber after sampling variable valve, sample flow meter.Another road is the carrier gas draft tube, and setting from source nitrogen connects reduction valve, carrier gas variable valve, carrier gas flux meter successively, connects afterwards injector injection working medium entrance.Injector outlet access hydrogen gas sensor, the exit tubes rows is to outside afterwards.
Pick-up unit is when work, carrier gas is entered by injector working medium entrance, form negative pressure in the injector working chamber, thereby poor at sampling draft tube two ends mineralization pressure, make and need to detect gas and enter stopple coupon and form and flow into the injector working chamber, carrier gas and need to detect the gas mixed diluting and enter hydrogen concentration sensor by the injector outlet.Pressure, carrier gas variable valve, sampling variable valve by regulating the decompressor outlet can change carrier gas and the flow and the mixing ratio that need to detect gas.Read respectively sample flow meter, carrier gas flux and take into account the indicating value of hydrogen gas sensor, utilize these three numerical value to calculate and to draw the hydrogen content in gas that detects.
Adopt the present invention to carry out the hydrogen concentration detection following advantage arranged:
1) adopting the sampling draft tube to extract needs to detect gas, needs Test Field so hydrogen gas sensor need not to be placed in, and can reduce cable and lay in the zone that may cause danger, improves security of system;
2) go out outside pipeline, all parts of pick-up unit can be placed in a casing, detect for multichannel, are convenient to the device centralized management and safeguard;
3) when density of hydrogen in the system environments atmosphere surpasses 4%, by the diluting effect of carrier gas, reach that in the mixed gas of hydrogen gas sensor, density of hydrogen and oxygen concentration all reduce, can guarantee operating sensor safety;
4) for the hydrogen of excessive concentration, adopt this device to detect, can improve hydrogen sensor sensitivity and reduce its release time.
Description of drawings
Figure is based on density of hydrogen pick-up unit process chart in the atmosphere of injection principle
1. sampling draft tube, 2. sampling variable valve, 3. sample flow meter, 4. carrier gas draft tube, 5. reduction valve, 6. electric carrier gas variable valve, 7. carrier gas flux meter, 8. injector, 9. hydrogen concentration sensor, 10. escape pipe.
Embodiment
Pipeline connects: the riding position of determining pick-up unit sampling draft tube according to field condition, make injector, hydrogen gas sensor, flowmeter, variable valve etc. be in the safety zone, then lay and connecting tube according to order in figure, the draft tube of wherein taking a sample begins to be connected to the injector working chamber by the position that needs detect hydrogen concentration.
Sampling detects: during work, regulate the reduction valve top hole pressure, and regulate carrier gas variable valve and sampling variable valve, make sample flow meter reading Q
1, with carrier gas flux meter reading Q
2Satisfy following relation:
25＜Q
2/Q
1＜30
Read hydrogen concentration sensor reading C, the Hydrogen in Air actual concentrations calculates according to following relational expression:
C
*＝C·Q
2/Q
1?。
Claims (3)
1. based on density of hydrogen pick-up unit in the atmosphere of injection principle, it is characterized in that: comprise the equipment such as sampling draft tube, sampling variable valve, flowmeter, carrier gas draft tube, reduction valve, carrier gas variable valve, carrier gas flux meter, injector, hydrogen concentration sensor, escape pipe.
2. sampling draft tube according to claim 1, it is characterized in that: sampling draft tube inlet end is exposed to the locus that needs to detect density of hydrogen, and sampling draft tube outlet side is connected in injector, forms negative pressure in the ejection cavity of injector, suck gas by the sampling draft tube, take a sample.
3. carrier gas draft tube according to claim 1 is characterized in that: introduce nitrogen in the carrier gas draft tube as injection working medium, nitrogen can dilute the density of hydrogen of gas sampled, as inert protective gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103902136A CN103134903A (en) | 2011-12-01 | 2011-12-01 | Atmosphere hydrogen concentration detector based on injection principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103902136A CN103134903A (en) | 2011-12-01 | 2011-12-01 | Atmosphere hydrogen concentration detector based on injection principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103134903A true CN103134903A (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103902136A Pending CN103134903A (en) | 2011-12-01 | 2011-12-01 | Atmosphere hydrogen concentration detector based on injection principle |
Country Status (1)
| Country | Link |
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| CN (1) | CN103134903A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391092A (en) * | 2014-12-12 | 2015-03-04 | 重庆市荣冠科技有限公司 | Multi-gas detection based gas inlet device |
| CN107525708A (en) * | 2016-06-21 | 2017-12-29 | 上海炫电气有限公司 | A kind of sample gas dilution system being operable with subnormal ambient |
| US10605796B2 (en) | 2013-12-02 | 2020-03-31 | TricornTech Taiwan | Real-time air monitoring with multiple sensing modes |
| CN113358689A (en) * | 2021-05-28 | 2021-09-07 | 中国核电工程有限公司 | Hydrogen concentration monitoring device, system and method |
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| JPS51147383A (en) * | 1975-06-13 | 1976-12-17 | Hitachi Ltd | Gas sampling device for an analysis device |
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| CN2145385Y (en) * | 1993-01-04 | 1993-11-03 | 中国石油化工总公司石油化工科学研究院 | Portable hydrogen measuring instrument with two-purpose wide-range quantity and alarm |
| EP0670490A2 (en) * | 1994-03-05 | 1995-09-06 | TESTO GmbH & Co. | Method and apparatus for measuring a gaseous medium with a chemical sensor |
| JP2000162169A (en) * | 1998-11-27 | 2000-06-16 | Shimadzu Corp | Gas measuring device |
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
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2011
- 2011-12-01 CN CN2011103902136A patent/CN103134903A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51147383A (en) * | 1975-06-13 | 1976-12-17 | Hitachi Ltd | Gas sampling device for an analysis device |
| JPS6227645A (en) * | 1985-07-29 | 1987-02-05 | Ishikawajima Harima Heavy Ind Co Ltd | Gas sampling apparatus |
| CN2145385Y (en) * | 1993-01-04 | 1993-11-03 | 中国石油化工总公司石油化工科学研究院 | Portable hydrogen measuring instrument with two-purpose wide-range quantity and alarm |
| EP0670490A2 (en) * | 1994-03-05 | 1995-09-06 | TESTO GmbH & Co. | Method and apparatus for measuring a gaseous medium with a chemical sensor |
| JP2000162169A (en) * | 1998-11-27 | 2000-06-16 | Shimadzu Corp | Gas measuring device |
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10605796B2 (en) | 2013-12-02 | 2020-03-31 | TricornTech Taiwan | Real-time air monitoring with multiple sensing modes |
| US11067558B2 (en) | 2013-12-02 | 2021-07-20 | TricornTech Taiwan | Real-time air monitoring with multiple sensing modes |
| TWI750490B (en) * | 2013-12-02 | 2021-12-21 | 創控生技股份有限公司 | Gas detector assembly and gas analysis process with multiple sensing modes |
| TWI803104B (en) * | 2013-12-02 | 2023-05-21 | 創控生技股份有限公司 | Gas detector assembly and gas analysis process with multiple sensing modes |
| CN104391092A (en) * | 2014-12-12 | 2015-03-04 | 重庆市荣冠科技有限公司 | Multi-gas detection based gas inlet device |
| CN107525708A (en) * | 2016-06-21 | 2017-12-29 | 上海炫电气有限公司 | A kind of sample gas dilution system being operable with subnormal ambient |
| CN107525708B (en) * | 2016-06-21 | 2019-12-24 | 上海炫一电气有限公司 | Sample gas dilution system capable of working in negative pressure environment |
| CN113358689A (en) * | 2021-05-28 | 2021-09-07 | 中国核电工程有限公司 | Hydrogen concentration monitoring device, system and method |
| CN113358689B (en) * | 2021-05-28 | 2023-10-24 | 中国核电工程有限公司 | Hydrogen concentration monitoring device, system and method |
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Application publication date: 20130605 |