CN105092661A - Catalytic combustion-type gas sensor - Google Patents
Catalytic combustion-type gas sensor Download PDFInfo
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- CN105092661A CN105092661A CN201510568194.XA CN201510568194A CN105092661A CN 105092661 A CN105092661 A CN 105092661A CN 201510568194 A CN201510568194 A CN 201510568194A CN 105092661 A CN105092661 A CN 105092661A
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- gas sensor
- survey agent
- silver
- catalytic combustion
- help
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Abstract
The present invention discloses a catalytic combustion-type gas sensor, which mainly comprises a Wheatstone bridge structure, an explosion-proof packaging chamber, a test assistant agent, a signal converter, and a concentration display device. The present invention relates to a catalytic combustion type gas sensor for methane detection. The test assistant agent does not produce sintered material in the detection process; the sensor does not require supporting oxygen content analyzer, and is still able to accurately and stably detect methane content in the case of oxygen shortage; and the detection sensitivity does not decline with time. The sensor provided by the invention can be matched with a variety of existing types of coalmine safety monitoring systems, and has very broad application prospects in the field of mining and industrial testing field.
Description
Technical field
The present invention relates to a kind of gas sensor, particularly relate to a kind of catalytic combustion method gas sensor detecting methane, belong to industry and mining detection field.
Background technology
Along with continuous expansion and the extension of pit mining scope, subsurface environment becomes and becomes increasingly complex, under mine, often can produce a large amount of flammable explosive gas, methane (CH
4) be wherein topmost one, if do not removed in time, after its content exceedes explosion limits, the small electric spark that can produce because of various consumer is ignited, thus great industrial accident occurs, and causes huge economic loss, jeopardizes the life of miner.So, underground coal mine methane gas is monitored fast and accurately and seems particularly important, the problem that relevant insider pays close attention to always is also become to the research and development of Methane monitoring.
At present, the pick-up unit of methane mainly contains two classes: 1, based on the pick-up unit of principle of catalyst combustion, is to use detecting device very widely in current mine, but it exists some defects, limit its application: 1. easily produce sinter, prevent combustible gas and sensor contacts; 2. need the carrier of oxygen volume concentrations of minimum 12%, in the not enough situation of oxygen concentration, work efficiency obviously declines; 3. in testing process, supporting oxygen content analyser is usually needed; 4. sensitivity declines in time.2, based on the detecting device of the NDIR (Non-Dispersive Infrared) line detection technique (NDIR) of conventional catalyst principle, it is the very fast detecting device of development in recent years, but it has some defects equally, there is Catalysis Principles transducer calibration cycle short, the easy phenomenon such as poisoning, and accuracy of detection is drifted about because of temperature variation sometimes, cause measurement performance instability, reliability not high.
Chinese patent CN101695658B, a kind of method for preparing catalytic combustion-type methane detection element, prepare the detecting element detecting methane content in a kind of methane content and the higher mine of hydrogen sulfide content, improve the speed of the surperficial carbon reaction that disappears of methane catalytic combustion reacting middle catalyst, weaken the intoxication of sulfuretted hydrogen to catalyzer; Improve the stability of methane catalytic combustion reaction, thus improve the stability of mine methane detecting element work.But this patent be not provided in oxygen concentration low when, can described element be stablized and accurately detect methane concentration.
Summary of the invention
For overcoming the defect of prior art, the first object of the present invention is to provide a kind of catalytic combustion method gas sensor.
Described catalytic combustion method gas sensor chief component, comprising: wheatstone bridge configuration, explosion-proof chamber, burning chamber, help and survey agent additional cavity, help and survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device.
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance.
The described black element with catalyzer is detecting element.
Described catalyzer is rare metal, and described rare metal includes but not limited to platinum, palladium, rhodium or its combination.
Further, described black element is platinum filament coil, and the diameter of wherein said platinum filament is 0.05 ~ 0.08mm, and the winding displacement density of solenoid is 300 ~ 500 circles/cm.
Described white element is compensating element.
The resistance value of described auxiliary resistance is 10 ~ 600 Ω.
Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made.
Described burning chamber, for CH
4thorough combustion in chamber, records CH by the heat energy of burning release and the resistance variations that causes
4content.
The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber.
Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen.Described help survey agent include but not limited to: silver oxide (Ag
2o), silver carbonate (Ag
2cO
3), silver peroxide (Ag
2o
2), silver sesquioxide (Ag
2o
3), cuprous oxide (Cu
2o) one or more combinations in the compound silver carbonate of nano silver particles, are covered with.
Preferably, helping described in and surveying agent is silver oxide (Ag
2o), silver carbonate (Ag
2cO
3), silver peroxide (Ag
2o
2), silver sesquioxide (Ag
2o
3) in one or more combination, be applicable to the methyl hydride combustion process of catalytic reaction temperature between 350 ~ 500 DEG C.
Preferably, helping described in and surveying agent is cuprous oxide (Cu
2o), the methyl hydride combustion process of catalytic reaction temperature below 350 DEG C is applicable to.
Preferably, helping described in and surveying agent is the compound silver carbonate being covered with nano silver particles.The mass ratio of described Nano Silver and silver carbonate is 2:1 ~ 5:1.Be applicable to the methyl hydride combustion process of catalytic reaction temperature between 150 ~ 200 DEG C.
The described massfraction helping survey agent to add is 0.02 ~ 10% of black element quality, and preferred massfraction is 0.1 ~ 5% of black element quality, and preferred massfraction is 3.5% of black element quality.
Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time.
Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process.
Described signal converter, by the voltage change signal received by described apparatus for detecting voltage change, or the thermal change signal detected by other device, be converted to the signal that the identifiable design such as light signal or ripple signal quantizes.
Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
The second object of the present invention is to provide a kind of underground coal mine warning system, comprise main control module, main control module and A/D converter, power module, communication module, methane concentration collection module, catalytic combustion method gas sensor of the present invention, methane concentration analysis module, methane concentration checking module, sound and light alarm module, display module.
Catalytic combustion method gas sensor of the present invention, can be used in the monitoring system of inflammable gas, also can be installed in Portable mining CH_4 detection device, can support the use with the Coal Mine Safety Monitoring System of various existing type.
Technique effect of the present invention:
1, not easily produce sinter, oxygen complete reaction generation carbon dioxide and the water in methyl hydride combustion process surveying agent and provide are provided.
2, to the not requirement of the oxygen concentration in tested methane gas, supporting oxygen content analyser is not needed; When oxygen content deficiency, the content of methane still accurately, stably can be detected.
3, sensitivity can not along with service time step-down, each detect to add help survey agent, help the sensitivity that described catalytic combustion method gas sensor keeps enough.
Product of the present invention have measure accurately, reaction velocity soon, wide by other gases affect, measurement range, long service life, stable performance, advantage that reliability is high.
Embodiment
Below by specific embodiment, further technical scheme of the present invention is specifically described.Should be appreciated that, the following examples just as illustrating, and do not limit the scope of the invention, and the apparent change made according to the present invention of those skilled in the art simultaneously and modification are also contained within the scope of the invention.
Embodiment 1
A kind of catalytic combustion method gas sensor, chief component comprises: wheatstone bridge configuration, explosion-proof chamber, burning chamber, help and survey agent additional cavity, help and survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device.
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance.The described black element with catalyzer is detecting element.Described catalyzer is rhotanium.Described white element is compensating element.The resistance value of described auxiliary resistance is 10 ~ 600 Ω.Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made.Described burning chamber, for CH
4thorough combustion in chamber, records its content by the heat energy of burning release and the resistance variations that causes.
The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber.Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen.Described help survey agent be silver oxide (Ag
2o) with silver carbonate (Ag
2cO
3) potpourri, be applicable to the methyl hydride combustion process of catalytic reaction temperature between 350 ~ 500 DEG C.
The described massfraction helping survey agent to add is 0.02 ~ 10% of black element quality.Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time.
Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process.Described signal converter, by the voltage change signal received by described apparatus for detecting voltage change, or the thermal change signal detected by other device, be converted to the signal that the identifiable design such as light signal or ripple signal quantizes.Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
Embodiment 2
A kind of catalytic combustion method gas sensor by wheatstone bridge configuration, explosion-proof chamber, burning chamber, help survey agent additional cavity, help survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device form.
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance.The described black element with catalyzer is for being platinum filament coil, and the diameter of wherein said platinum filament is 0.05 ~ 0.08mm, and the winding displacement density of solenoid is 300 ~ 500 circles/cm.Described white element is compensating element.The resistance value of described auxiliary resistance is 10 ~ 600 Ω.Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made.Described burning chamber, for CH
4thorough combustion in chamber, records its content by the heat energy of burning release and the resistance variations that causes.
The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber.Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen.Described help survey agent be cuprous oxide (Cu
2o), the methyl hydride combustion process of catalytic reaction temperature below 350 DEG C is applicable to.The described massfraction helping survey agent to add is 0.1 ~ 5% of black element quality.Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time.Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process.Described signal converter, is converted to the signal that the identifiable design such as light signal or ripple signal quantizes by the voltage change signal received by described apparatus for detecting voltage change.Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
Embodiment 3
A kind of underground coal mine warning system, comprise catalytic combustion method gas sensor and main control module, the modules such as main control module and A/D converter, power module, communication module, methane concentration collection module, methane concentration analysis module, methane concentration checking module, sound and light alarm module, display module.
Described catalytic combustion method gas sensor chief component comprises: wheatstone bridge configuration, explosion-proof chamber, burning chamber, help and survey agent additional cavity, help and survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device.
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance.
The described black element with catalyzer is detecting element.Described catalyzer is rare metal, and described rare metal includes but not limited to platinum, palladium, rhodium or its combination.Described white element is compensating element.The resistance value of described auxiliary resistance is 10 ~ 600 Ω.Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made.Described burning chamber, for CH
4thorough combustion in chamber, records its content by the heat energy of burning release and the resistance variations that causes.The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber.Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen.Described help survey agent be silver oxide (Ag
2o), silver peroxide (Ag
2o
2), silver sesquioxide (Ag
2o
3) composition.The described massfraction helping survey agent to add is 3.5% of black element quality.
Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time.Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process.Described signal converter, by the voltage change signal received by described apparatus for detecting voltage change, is converted to the signal that the identifiable design such as light signal or ripple signal quantizes.Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
Embodiment 4
A kind of Coal Mine Safety Monitoring System, except the control system of prior art, especially also have catalytic combustion method gas sensor, described catalytic combustion method gas sensor chief component comprises: wheatstone bridge configuration, explosion-proof chamber, burning chamber, help and survey agent additional cavity, help and survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device.
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance.The described black element with catalyzer is detecting element.Described catalyzer is the alloy of platinum and palladium.Described white element is compensating element.The resistance value of described auxiliary resistance is 10 ~ 600 Ω.Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made.Described burning chamber, for CH
4thorough combustion in chamber, records its content by the heat energy of burning release and the resistance variations that causes.
The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber.Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen.Described help survey agent be the compound silver carbonate being covered with nano silver particles.The mass ratio of described Nano Silver and silver carbonate is 2:1 ~ 5:1.Be applicable to the methyl hydride combustion process of catalytic reaction temperature between 150 ~ 200 DEG C.The described massfraction helping survey agent to add is 0.1 ~ 5% of black element quality.
Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time.Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process.Described signal converter, is converted to the signal that the identifiable design such as light signal or ripple signal quantizes by the voltage change signal received by described apparatus for detecting voltage change.Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
Claims (9)
1. a catalytic combustion method gas sensor, comprising: wheatstone bridge configuration, explosion-proof chamber, burning chamber, help and survey agent additional cavity, help and survey agent, combustion waste discharge side, apparatus for detecting voltage change, signal converter, concentration display device;
Described wheatstone bridge configuration comprises voltage stabilizing power supply, the black element with catalyzer, white element, auxiliary resistance;
The described black element with catalyzer is detecting element;
Described catalyzer is rare metal, and described rare metal includes but not limited to platinum, palladium, rhodium or its combination;
Described white element is compensating element;
The resistance value of described auxiliary resistance is 10 ~ 600 Ω;
Described explosion-proof chamber adopts accurate encapsulation, utilizes explosion-proof lamp to be made;
Described burning chamber, for methane (CH
4) Thorough combustion in chamber, record its content by the heat energy of burning release and the resistance variations that causes;
The described survey agent additional cavity that helps provides a passage helping survey agent to enter explosion-proof chamber;
Describedly helping survey agent, is a kind of consumptive material, for reaction provides required oxygen;
Described help survey agent include but not limited to: silver oxide (Ag
2o), silver carbonate (Ag
2cO
3), silver peroxide (Ag
2o
2), silver sesquioxide (Ag
2o
3), cuprous oxide (Cu
2o) one or more combinations in the compound silver carbonate of nano silver particles, are covered with;
The described mass percent helping survey agent to add is 0.02 ~ 10% of black element quality;
Products of combustion and imperfect combustion waste gas are discharged by described combustion waste discharge side in time;
Described apparatus for detecting voltage change, detects the change in voltage in circuit in combustion process;
Described signal converter, by the voltage change signal received by described apparatus for detecting voltage change, or the thermal change signal detected by other device, be converted to the signal that the identifiable design such as light signal or ripple signal quantizes;
Described concentration display device, by the signal that described signal converter sends, is converted into displayable waveform, thus is shown on the display apparatus by the methane concentration detected.
2. catalytic combustion method gas sensor according to claim 1, is characterized in that: described black element is platinum filament coil, and the diameter of wherein said platinum filament is 0.05 ~ 0.08mm, and the winding displacement density of solenoid is 300 ~ 500 circles/cm.
3. catalytic combustion method gas sensor according to claim 1 and 2, is characterized in that: described in help survey agent be silver oxide (Ag
2o), silver carbonate (Ag
2cO
3), silver peroxide (Ag
2o
2), silver sesquioxide (Ag
2o
3) in one or more combination, be applicable to the methyl hydride combustion process of catalytic reaction temperature between 350 ~ 500 DEG C.
4. catalytic combustion method gas sensor according to claim 3, is characterized in that: described in help survey agent be cuprous oxide (Cu
2o), the methyl hydride combustion process of catalytic reaction temperature below 350 DEG C is applicable to.
5. catalytic combustion method gas sensor according to claim 3, is characterized in that: described in help survey agent be the compound silver carbonate being covered with nano silver particles, be applicable to the methyl hydride combustion process of catalytic reaction temperature between 150 ~ 200 DEG C;
The mass ratio of described Nano Silver and silver carbonate is 2:1 ~ 5:1.
6., according to the arbitrary catalytic combustion method gas sensor described in claim 3 ~ 5, it is characterized in that: described in help survey agent add mass percent be 0.1 ~ 5% of black element quality.
7. catalytic combustion method gas sensor according to claim 6, is characterized in that: described in help survey agent add mass percent be 3.5% of black element quality.
8. a underground coal mine warning system, it is characterized in that: comprise main control module, main control module and A/D converter, power module, communication module, methane concentration collection module, the arbitrary catalytic combustion method gas sensor described in claim 1 ~ 7, methane concentration analysis module, methane concentration checking module, sound and light alarm module, display module.
9. a Coal Mine Safety Monitoring System, is characterized in that: described Coal Mine Safety Monitoring System comprises the arbitrary catalytic combustion method gas sensor described in claim 1 ~ 7.
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|---|---|---|---|
| CN201510568194.XA CN105092661A (en) | 2015-09-08 | 2015-09-08 | Catalytic combustion-type gas sensor |
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|---|---|---|---|
| CN201510568194.XA CN105092661A (en) | 2015-09-08 | 2015-09-08 | Catalytic combustion-type gas sensor |
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| CN105092661A true CN105092661A (en) | 2015-11-25 |
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ID=54573573
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| CN201510568194.XA Pending CN105092661A (en) | 2015-09-08 | 2015-09-08 | Catalytic combustion-type gas sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699430A (en) * | 2016-03-28 | 2016-06-22 | 南通理工学院 | Multifunctional gas concentration detector |
| CN106442867A (en) * | 2016-06-03 | 2017-02-22 | 李智 | Combustible gas concentration detection method and detection device |
| CN106596836A (en) * | 2017-01-23 | 2017-04-26 | 河南驰诚电气股份有限公司 | Apparatus and method for preventing catalytic combustion sensor from poisoning |
| CN108918751A (en) * | 2018-06-14 | 2018-11-30 | 北京惟泰安全设备有限公司 | Modified catalytic combustion gas sensor and its gas detection method |
| CN112857814A (en) * | 2021-03-24 | 2021-05-28 | 潍柴动力股份有限公司 | Engine fire monitoring method and system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699430A (en) * | 2016-03-28 | 2016-06-22 | 南通理工学院 | Multifunctional gas concentration detector |
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| CN106596836A (en) * | 2017-01-23 | 2017-04-26 | 河南驰诚电气股份有限公司 | Apparatus and method for preventing catalytic combustion sensor from poisoning |
| CN108918751A (en) * | 2018-06-14 | 2018-11-30 | 北京惟泰安全设备有限公司 | Modified catalytic combustion gas sensor and its gas detection method |
| CN112857814A (en) * | 2021-03-24 | 2021-05-28 | 潍柴动力股份有限公司 | Engine fire monitoring method and system and vehicle |
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Application publication date: 20151125 |