CN106383141A - Method and system for inhibiting sensitivity attenuation of catalytic-combustion detecting elements - Google Patents

Method and system for inhibiting sensitivity attenuation of catalytic-combustion detecting elements Download PDF

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Publication number
CN106383141A
CN106383141A CN201610753716.8A CN201610753716A CN106383141A CN 106383141 A CN106383141 A CN 106383141A CN 201610753716 A CN201610753716 A CN 201610753716A CN 106383141 A CN106383141 A CN 106383141A
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CN
China
Prior art keywords
catalytic combustion
fuel gas
combustion type
detecting
gas detecting
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.)
Pending
Application number
CN201610753716.8A
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Chinese (zh)
Inventor
樊荣
于庆
孙世岭
谭凯
赵庆川
魏华峰
梁光清
叶文韬
周德胜
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Application filed by Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group filed Critical Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
Priority to CN201610753716.8A priority Critical patent/CN106383141A/en
Publication of CN106383141A publication Critical patent/CN106383141A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/20Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/28Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
    • G01N25/30Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
    • G01N25/32Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements

Abstract

The invention provides a method for inhibiting sensitivity attenuation of catalytic-combustion detecting elements. Two catalytic-combustion inflammable gas detecting elements are adopted to alternatively undergo inflammable gas detection. The two catalytic-combustion inflammable gas detecting elements have the same performance characteristics and the same power supply level. According to the method for inhibiting sensitivity attenuation of catalytic-combustion detecting elements, the two catalytic-combustion inflammable gas detecting elements are alternatively powdered up by equal working time so as to inhibit monotonic attenuation of element sensitivity. Then, detection precision of an instrument is guaranteed under the condition of long-term operation, and alignment calibration period of an instrument can be effectively prolonged so as to reduce field maintenance workload.

Description

The method and system of suppression catalytic combustion type detecting element sensitivity decay
Technical field
The present invention relates to fuel gas detection field, more particularly, to one kind suppression catalytic combustion type detecting element sensitivity decline The method and system subtracting.
Background technology
Catalytic combustion type gas detects, is the fuel factor principle using catalysis burning, is joined by detecting element and compensating element, To constituting measuring bridge, under the conditions of uniform temperature, fuel gas is sent out in the presence of detecting element carrier surface and catalyst Raw flameless combustion, raises with bed temperature, and its internal platinum wire resistance also accordingly raises so that balanced bridge lose flat Weighing apparatus, exports an electric signal being directly proportional to combustable gas concentration, by measuring the size of the resistance variations of platinum filament, obtains flammable The concentration of property gas.
Because catalysis combustion supervision element normal working temperature is generally 500 degrees centigrade, catalyst is in this high temperature shape Long time continuous working under state, itself also can gradually be aoxidized, thus losing catalysis activity, showing as element sensitivity and declining. Therefore, it is currently based on single Measuring Instruments for inflammable Gases being only catalyzed combustion supervision element, sensitive under long continuous operation state Degree can be decayed in time, causes the accuracy of detection of instrument to decline.So, such instrument needs periodically in use by artificial Calibration, but usual accuracy of detection ensures that the time is only 15 days about, safeguards to onsite application and causes great difficulty, does not much reach The application demand of user.Therefore, need a kind of new technological means badly, to ensure the accuracy of detection of catalytic combustion type gas detection.
Content of the invention
Catalysis combustion supervision element long time continuous working, catalyst can gradually aoxidize and lead to sensitivity to decline, but when unit Part is in off-position, and under air ambient, oxidized catalyst can gradually reduce again, thus it is extensive to make element sensitivity obtain Multiple.In view of this, the present invention provides a kind of method and system of suppression catalytic combustion type detecting element sensitivity decay, to solve The problems referred to above.
The method of the suppression catalytic combustion type detecting element sensitivity decay that the present invention provides, including
Using the alternately fuel gas detection of two catalytic combustion type fuel gas detecting elements, described two catalysis combustions The Performance Characteristics of burning formula fuel gas detecting element is identical, when a catalytic combustion type fuel gas detecting element is in work shape During state, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state.
Further, respectively two catalytic combustion type fuel gas detecting elements are carried out using identical power supply voltage level Power supply.
Further, described two catalytic combustion type fuel gas detecting elements are alternately worked than the working time with waiting.
Further, alternately upper electricity is carried out to control each catalytic combustion type fuel gas detecting element by setting controlling switch Work, using the detected value of in running order catalytic combustion type fuel gas detecting element as testing result.
The present invention also provide a kind of suppression catalytic combustion type detecting element sensitivity decay system, include control unit with Catalytic combustion type fuel gas detecting element, the quantity of described catalytic combustion type fuel gas detecting element is two, urges for two The Performance Characteristics changing combustion-type fuel gas detecting element is identical, and is connected with control unit respectively, and control unit controls two The alternately fuel gas detection of catalytic combustion type fuel gas detecting element, when a catalytic combustion type fuel gas detection unit When part is in running order, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state.
Further, described control unit at least includes controller, clock module and switch module, described clock module and opening Close module be connected with controller respectively, by control unit control described two catalytic combustion type fuel gas detecting elements with etc. Alternately work than the working time.
Further, alternately upper electricity is carried out to control each catalytic combustion type fuel gas detecting element by setting controlling switch Work, using the detected value of in running order catalytic combustion type fuel gas detecting element as testing result.
Further, also include power subsystem, described power subsystem is urged to two respectively using identical power supply voltage level Change combustion-type fuel gas detecting element to be powered.
Beneficial effects of the present invention:The method of the suppression catalytic combustion type detecting element sensitivity decay in the present invention, can To suppress spirit by carrying out to two catalytic combustion type fuel gas detecting elements etc. than alternately working on power of working time Sensitivity decays, thus ensureing accuracy of detection under the conditions of long-term work for the instrument, can effectively extend the instrument calibration cycle, thus subtracting Few field maintenance workload, present configuration is simple, and strong adaptability can be widely applied to the use ring that there is fuel gas Border, such as underground coal mine, city piping lane, sewer etc..
Brief description
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the principle schematic of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples:Fig. 1 is the principle schematic of the present invention.
As shown in figure 1, the method for the suppression catalytic combustion type detecting element sensitivity decay in the present embodiment, including
Using the alternately fuel gas detection of two catalytic combustion type fuel gas detecting elements, described two catalysis combustions The Performance Characteristics of burning formula fuel gas detecting element is identical, when a catalytic combustion type fuel gas detecting element is in work shape During state, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state.
In the present embodiment, using the identical catalytic combustion type fuel gas detecting element of a pair of Performance Characteristics, adopt Use identical power supply voltage level, by alternately working, and according to also there is sensitivity in time in the power-off state The characteristic recovered, can effectively suppress the decay of the sensitivity of catalytic combustion type fuel gas detecting element.
In the present embodiment, two catalytic combustion type fuel gas detecting elements are to wait than working time alternately work Make it is preferable that can by setting control unit be automatically controlled, control unit at least include controller, clock module and Switch module, controller respectively with clock module and switch module, clock module be used for for control unit provide clock reference, use Family can control the time interval of alternation it is preferable that can be according to every kind of catalytic combustion type combustible gas by control unit The service life of body detecting element, calculates, by optimized algorithm, the damped cycle that it continuously uses and be spaced power-off to use, passes through The statistical modes such as weighting obtain optimal time interval.
In the present embodiment, by arrange controlling switch control each catalytic combustion type fuel gas detecting element replace on Electricity is operated, using the detected value of in running order catalytic combustion type fuel gas detecting element as testing result.? In the present embodiment, can be by arranging hand control switch with the switch module automatically controlling to catalytic combustion type combustible gas health check-up Survey element and switch over control, by arranging controlling switch in its current supply circuit, the work such as maintenance, calibration can be convenient for Carrying out.
In the present embodiment, using identical power supply voltage level respectively to two catalytic combustion type fuel gas detection units Part is powered, element replace on electricity and work during, using the detected value of operation element as the comprehensive detection of equipment Result.
Correspondingly, present embodiments provide a kind of system of suppression catalytic combustion type detecting element sensitivity decay, including Control unit and catalytic combustion type fuel gas detecting element, the quantity of described catalytic combustion type fuel gas detecting element is two Individual, the Performance Characteristics of two catalytic combustion type fuel gas detecting elements is identical, and is connected with control unit respectively, control unit Control the alternately fuel gas detection of two catalytic combustion type fuel gas detecting elements, when a catalytic combustion type combustible gas When body detecting element is in running order, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state. Described control unit at least includes controller, clock module and switch module, described clock module and switch module respectively with control Device processed connects, and controls described two catalytic combustion type fuel gas detecting elements to wait by control unit and replaces than working time It is operated.Alternately upper electricity is operated to control each catalytic combustion type fuel gas detecting element by setting controlling switch, Using the detected value of in running order catalytic combustion type fuel gas detecting element as testing result.According to claim 6 The system of described suppression catalytic combustion type detecting element sensitivity decay,
In the present embodiment, also include power subsystem, described power subsystem adopts identical power supply voltage level right respectively Two catalytic combustion type fuel gas detecting elements are powered.
The system of the suppression catalytic combustion type detecting element sensitivity decay in the present embodiment, different from normal in prior art The active/standby mode of rule, by controlling alternately upper electricity and the work of two catalysis burning combustible gas detecting elements, carrys out straining element spirit The decay of sensitivity, and with etc. than the working time alternately upper electric control sequential, control two catalysis burning combustible gas detections Element alternately upper electricity and work, is due to catalytic combustion type fuel gas detecting element, have in the power-off state sensitivity with This characteristic that time recovers determines, can effectively suppress in this way to decay, common active/standby mode is in theory On can extend one times of use time, its essence can be regarded as the superposition of the service life of two equipment, and this enforcement Example in method and system, its inhibition decaying can be made to be far longer than this restriction, and in this way moreover it is possible to It is easy to safeguard, also assures that the precision of detection simultaneously.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although with reference to relatively Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention Art scheme is modified or equivalent, the objective without deviating from technical solution of the present invention and scope, and it all should be covered at this In the middle of the right of invention.

Claims (8)

1. a kind of suppression catalytic combustion type detecting element sensitivity decay method it is characterised in that:Including
Using the alternately fuel gas detection of two catalytic combustion type fuel gas detecting elements, described two catalytic combustion types The Performance Characteristics of fuel gas detecting element is identical, when a catalytic combustion type fuel gas detecting element is in running order When, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state.
2. according to claim 1 suppression catalytic combustion type detecting element sensitivity decay method it is characterised in that:Institute State two catalytic combustion type fuel gas detecting elements alternately to work than the working time to wait.
3. according to claim 2 suppression catalytic combustion type detecting element sensitivity decay method it is characterised in that:Logical Cross setting controlling switch to control each catalytic combustion type fuel gas detecting element alternately upper electricity is operated, to be in work shape The detected value of the catalytic combustion type fuel gas detecting element of state is as testing result.
4. according to claim 1 suppression catalytic combustion type detecting element sensitivity decay method it is characterised in that:Adopt Respectively two catalytic combustion type fuel gas detecting elements are powered with identical power supply voltage level.
5. a kind of suppression catalytic combustion type detecting element sensitivity decay system it is characterised in that:Including control unit and urging Change combustion-type fuel gas detecting element, the quantity of described catalytic combustion type fuel gas detecting element is two, two catalysis The Performance Characteristics of combustion-type fuel gas detecting element is identical, and is connected with control unit respectively, and control unit controls two and urges Change the alternately fuel gas detection of combustion-type fuel gas detecting element, when a catalytic combustion type fuel gas detecting element When in running order, another one catalytic combustion type fuel gas detecting element is in power interruption recovering state.
6. according to claim 5 suppression catalytic combustion type detecting element sensitivity decay system it is characterised in that:Institute State control unit and at least include controller, clock module and switch module, described clock module and switch module respectively with control Device connect, by control unit control described two catalytic combustion type fuel gas detecting elements wait replace than working time into Row work.
7. according to claim 5 suppression catalytic combustion type detecting element sensitivity decay system it is characterised in that:Logical Cross setting controlling switch to control each catalytic combustion type fuel gas detecting element alternately upper electricity is operated, to be in work shape The detected value of the catalytic combustion type fuel gas detecting element of state is as testing result.
8. according to claim 5 suppression catalytic combustion type detecting element sensitivity decay system it is characterised in that:Also Including power subsystem, described power subsystem adopts identical power supply voltage level respectively to two catalytic combustion type combustible gas health check-ups Survey element to be powered.
CN201610753716.8A 2016-08-29 2016-08-29 Method and system for inhibiting sensitivity attenuation of catalytic-combustion detecting elements Pending CN106383141A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107449798A (en) * 2017-08-14 2017-12-08 河北工业大学 Preparation method for the gas sensor of methane gas detection

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1419361A (en) * 1974-03-26 1975-12-31 Gen Monitors Multi-channel combustible gas detector
US4548515A (en) * 1984-04-23 1985-10-22 Clusener Gerhard R Multiple sensor dilatometer
CN201662568U (en) * 2009-10-30 2010-12-01 北京华圣金程科技有限公司 Carbon monoxide detection system of novel coal mill
CN102507666A (en) * 2011-11-22 2012-06-20 河南汉威电子股份有限公司 Inflammable gas detecting instrument and desulphurization method thereof
CN202362266U (en) * 2011-11-22 2012-08-01 河南汉威电子股份有限公司 Combustible gas detector
CN106802339A (en) * 2017-01-19 2017-06-06 烟台睿创微纳技术股份有限公司 A kind of array type MEMS gas sensors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1419361A (en) * 1974-03-26 1975-12-31 Gen Monitors Multi-channel combustible gas detector
US4548515A (en) * 1984-04-23 1985-10-22 Clusener Gerhard R Multiple sensor dilatometer
CN201662568U (en) * 2009-10-30 2010-12-01 北京华圣金程科技有限公司 Carbon monoxide detection system of novel coal mill
CN102507666A (en) * 2011-11-22 2012-06-20 河南汉威电子股份有限公司 Inflammable gas detecting instrument and desulphurization method thereof
CN202362266U (en) * 2011-11-22 2012-08-01 河南汉威电子股份有限公司 Combustible gas detector
CN106802339A (en) * 2017-01-19 2017-06-06 烟台睿创微纳技术股份有限公司 A kind of array type MEMS gas sensors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107449798A (en) * 2017-08-14 2017-12-08 河北工业大学 Preparation method for the gas sensor of methane gas detection
CN107449798B (en) * 2017-08-14 2019-07-26 河北工业大学 The production method of gas sensor for methane gas detection

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Application publication date: 20170208