CN106168591B - Combustible gas detecting device in a kind of furnace - Google Patents
Combustible gas detecting device in a kind of furnace Download PDFInfo
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- CN106168591B CN106168591B CN201610693842.9A CN201610693842A CN106168591B CN 106168591 B CN106168591 B CN 106168591B CN 201610693842 A CN201610693842 A CN 201610693842A CN 106168591 B CN106168591 B CN 106168591B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating 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
- G01N25/22—Investigating 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
- G01N25/26—Investigating 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 using combustion with oxygen under pressure, e.g. in bomb calorimeter
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- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of detection devices of fuel gas in field of gas detection more particularly to furnace.It has combustion chamber, and the combustion chamber is provided with temperature sensor, and the temperature sensor is connected with LEL signal picker, and the LEL signal picker is connected with actuator；The combustion chamber lower part is also connected with gas sample mouth, and the sample tap is connected with burner hearth；The combustion chamber lower part is also connected with combustion-supporting hydrogen inlet and corresponding combustion-supporting hydrogen flowmeter；The fire arrester for preventing flame from diffusing out combustion chamber is connected with above the combustion chamber at waste gas outlet.Usefulness of the present invention is: directly being burnt using combustion chamber and samples gas, and by temperature sensor detection calorific value variation, sensor long service life is measured accurate.The extraction of air pump is not necessarily to the sampling of furnace gas using negative pressure drainage principle, reduces air pump link, stablizes fault-free.It is not necessarily to sample the cooling procedure of gas using present apparatus detection furnace high-temperature gas, reduces the link of cooling sampling.
Description
Technical field:
The present invention relates to a kind of detection devices of fuel gas in field of gas detection more particularly to furnace.
Background technique:
There are two types of the fuel gas detections of the prior art, and one is catalytic combustion-types, and one is infrared optics types.
Catalytic combustion type fuel gas detector is flammable to measure using the resistance variations after the heating of refractory metal platinum filament
Gas concentration, when fuel gas enters detector, the catalyst coat on platinum filament surface causes oxidation reaction, generates
Heat increases platinum wire temperature, and the resistivity of platinum filament is made to change, to determine the concentration variation of fuel gas.This side
Formula detector is to use the platinum filament of catalyst coat as sensor probe, and service life is short, big using rear changing value, and calibration is tired
It is difficult.
Infrared radiation detection apparatus is using infrarefraction optical principle detection gas concentration, with the difference of gaseous species, particle
Degree, the content of moisture content are different, too big on detection accuracy influence, and the scope of application is small.Both the above detection mode is confined to environment inspection
It surveys, is also a problem for the detection as fuel gas in industrial furnace.
Summary of the invention:
The technical problem to be solved by the invention is to provide a kind of structures, and simple, reliable performance fuel gas detects dress
It sets, the detection device of fuel gas in especially a kind of furnace.
Against the above technical problems, combustible gas detecting device in a kind of furnace of the present invention has combustion chamber, described
Combustion chamber is provided with temperature sensor, and the temperature sensor is connected with LEL signal picker, the LEL signal acquisition
Device is connected with actuator；The combustion chamber lower part is also connected with gas sample mouth, and the sample tap is connected with burner hearth；The burning
Room lower part is also connected with combustion-supporting hydrogen inlet and corresponding combustion-supporting hydrogen flowmeter；Connect at waste gas outlet above the combustion chamber
It is connected to the fire arrester for preventing flame from diffusing out combustion chamber.
Preferably, in order to control the velocity of discharge of the injection rate of gas to be detected and exhaust gas, the fire arrester connection
There is the depression drainage device for improving the exhaust gas velocity of discharge, control exhaust gas row is additionally provided between the fire arrester and depression drainage device
The exhaust gas control valve of speed out.
Preferably, it is empty that described depression drainage device one end is provided with compression in order to which the exhaust gas in combustion chamber is discharged in time
The pressure reducing valve of gas entrance and control compressed air, the other end are provided with Waste gas outlet.
Preferably, being additionally provided with calibration gas entrance and corresponding calibration air-flow between the combustion chamber and gas sample mouth
Meter and purging air entrance and corresponding purging air flowmeter.
Preferably, the hydrogen full combustion in order to enable injection, between the combustion chamber and purging air entrance also
Equipped with calibration oxygen intake and corresponding calibration oxygen flow meter.
The need detection fuel gas of certain flow, the combustion heat of increment are passed through in the combustion of hydrogen room of a compact stabilized
Value to detect the LEL value of fuel gas, and exports alarm and 4-20mA output by indoor thermocouple measurement of burning
Signal.It is this by fuel value variation come detect fuel gas in the way of, long service life, detection accuracy is high, is suitble to various more
The detection of component fuel gas, it is applied widely.
Compared with prior art, usefulness of the present invention is: directly being burnt using combustion chamber and samples gas, and passed by temperature
Sensor detects calorific value variation, and sensor long service life, measurement is accurately.Using negative pressure drainage principle to the sampling nothing of furnace gas
The extraction for needing air pump reduces air pump link, stablizes fault-free.Using present apparatus detection furnace high-temperature gas without sampling gas
Cooling procedure reduces the link of cooling sampling.
Detailed description of the invention:
The following further describes the present invention with reference to the drawings.
Fig. 1 is the structural schematic diagram of combustible gas detecting device in furnace.
In figure: 1, compressed air inlet；2, pressure reducing valve；3, depression drainage device；4, Waste gas outlet；5, exhaust gas control valve；
6, fire arrester；7, temperature sensor；8, combustion chamber；9, gas sample mouth；10 burner hearths；11, oxygen flow meter is demarcated；12, it demarcates
Oxygen intake；13, air-flow meter is demarcated；14, gas entrance is demarcated；15, purging air flowmeter；16, purging air entrance；17,
Combustion-supporting hydrogen flowmeter；18, combustion-supporting hydrogen inlet；19, actuator；20, LEL signal picker.
Specific embodiment:
Combustible gas detecting device in a kind of furnace of the present invention has combustion chamber 8, the combustion chamber as shown in Figure 1:
8 are internally provided with temperature sensor 7, and the temperature sensor 7 is connected with LEL signal picker 20, the LEL signal picker
20 are connected with actuator 19；8 lower part of combustion chamber is also connected with gas sample mouth 9, and the gas sample mouth 9 is connected with burner hearth
11；The combustion chamber lower part is also connected with combustion-supporting hydrogen inlet 18 and corresponding combustion-supporting hydrogen flowmeter 17；The combustion chamber 8
Top is connected with the fire arrester 6 for preventing flame from diffusing out combustion chamber 8.
Preferably, in order to control the velocity of discharge of the injection rate of gas to be detected and exhaust gas, the fire arrester 6 is connected
There is the depression drainage device 3 for improving the exhaust gas velocity of discharge, it is useless that control is additionally provided between the fire arrester 6 and depression drainage device 3
The exhaust gas control valve 5 of the gas velocity of discharge.
Preferably, it is empty that described 3 one end of depression drainage device is provided with compression in order to which the exhaust gas in combustion chamber is discharged in time
The pressure reducing valve 2 of gas entrance 1 and control compressed air, the other end are provided with Waste gas outlet 4.
Preferably, being additionally provided with calibration gas entrance 14 and corresponding calibration between the combustion chamber 8 and gas sample mouth 9
Air-flow meter 13 and purging air entrance 16 and corresponding purging air flowmeter 15.
Preferably, the hydrogen full combustion in order to enable injection, between the combustion chamber 8 and purging air entrance 16
It is additionally provided with calibration oxygen intake 12 and corresponding calibration oxygen flow meter 11.
Combustion-supporting hydrogen controls flow by helping fuel gas inlet 18 to enter combustion chamber 8, and by combustion-supporting hydrogen flowmeter 17, is burning
Stablize burning by certain tolerance in room 8.It samples gas and combustion chamber 8 is entered by sample tap 9 out of burner hearth 10, in combustion chamber 8
Increase fuel value, the tolerance for sampling gas is controlled by exhaust gas control valve 5.Negative pressure drainage mouth 3 is being drawn when being discharged by compressed air
The intracavitary negative pressure that formed of device is flowed to draw the exhaust gas in combustion chamber 8.Compressed air controls pressure by pressure reducing valve 2.
The value added burnt in the combustion chamber 8 that temperature sensor 7 perceives by the fixed value of combustion-supporting combustion of hydrogen and sampling gas,
It is transferred to LEL signal picker 20, is converted into 4-20mA output signal, to control the movement of actuator 19.Purging air is by blowing
It sweeps air intake 16 and enters the control of purging air flowmeter 15, output signal use when needing to demarcate LEL signal value is normal to examine
It is closed when survey.When needing to demarcate LEL signal value, calibration gas is entered by calibration gas entrance 14, demarcates oxygen by calibration oxygen intake
12 enter, and control flow by respective streams meter 11, carry out 0 point calibration to LEL signal value.
It is emphasized that: the above is only the introduction of usage mode of the invention and descriptions, not make to the present invention any
Formal limitation, according to the technical essence of the invention any simple modification to the above embodiments, equivalent variations
With modification, all of which are still within the scope of the technical scheme of the invention.
Claims (3)
1. combustible gas detecting device in a kind of furnace has combustion chamber (8), it is characterised in that: setting inside the combustion chamber (8)
Have temperature sensor (7), the temperature sensor (7) is connected with LEL signal picker (20), the LEL signal picker
(20) actuator (19) are connected with；Combustion chamber (8) lower part is also connected with gas sample mouth (9), the gas sample mouth (9)
It is connected with burner hearth (10)；Combustion chamber (8) lower part is also connected with combustion-supporting hydrogen inlet (18) and corresponding combustion-supporting hydrogen stream
Meter (17)；The fire arrester (6) for preventing flame from diffusing out combustion chamber (8) is connected with above the combustion chamber (8)；The back-fire relief
Device (6) is connected with the depression drainage device (3) for improving the exhaust gas velocity of discharge, the fire arrester (6) and depression drainage device (3) it
Between be additionally provided with control the exhaust gas velocity of discharge exhaust gas control valve (5)；Described depression drainage device (3) one end is provided with compressed air and enters
Mouth (1) and the pressure reducing valve (2) for controlling compressed air, the other end are provided with Waste gas outlet (4).
2. combustible gas detecting device in furnace according to claim 1, it is characterised in that: the combustion chamber (8) and gas
Calibration gas entrance (14) and corresponding calibration air-flow meter (13) and purging air entrance (16) are additionally provided between sample tap (9)
And corresponding purging air flowmeter (15).
3. combustible gas detecting device in furnace according to claim 2, it is characterised in that: the combustion chamber (8) and purging
Calibration oxygen intake (12) and corresponding calibration oxygen flow meter (11) are additionally provided between air intake (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693842.9A CN106168591B (en) | 2016-08-22 | 2016-08-22 | Combustible gas detecting device in a kind of furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693842.9A CN106168591B (en) | 2016-08-22 | 2016-08-22 | Combustible gas detecting device in a kind of furnace |
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| Publication Number | Publication Date |
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| CN106168591A CN106168591A (en) | 2016-11-30 |
| CN106168591B true CN106168591B (en) | 2019-03-29 |
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| CN201610693842.9A Active CN106168591B (en) | 2016-08-22 | 2016-08-22 | Combustible gas detecting device in a kind of furnace |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208321A (en) * | 2019-07-04 | 2019-09-06 | 上海智昂环保科技有限公司 | A kind of combustible gas explosion limit analysis system |
| CN111366609A (en) * | 2020-03-15 | 2020-07-03 | 莱浦顿(上海)工程技术有限公司 | Combustible gas analyzer |
| CN111503647A (en) * | 2020-04-10 | 2020-08-07 | 中国船舶重工集团公司第七一八研究所 | Negative pressure ignition and combustion system and method for using negative pressure ignition and stable combustion of system |
| CN117871451A (en) * | 2024-03-12 | 2024-04-12 | 南京霍普斯科技有限公司 | System for measuring combustion temperature and monitoring combustible explosive gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002286644A (en) * | 2001-03-22 | 2002-10-03 | Mitsubishi Heavy Ind Ltd | Gasifying apparatus |
| CN104569038A (en) * | 2013-10-11 | 2015-04-29 | 上海锦宜仪器有限公司 | Device and method for combustible gas detection |
| CN206057230U (en) * | 2016-08-22 | 2017-03-29 | 苏州工业园区姑苏科技有限公司 | Combustible gas detecting device in stove |
-
2016
- 2016-08-22 CN CN201610693842.9A patent/CN106168591B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002286644A (en) * | 2001-03-22 | 2002-10-03 | Mitsubishi Heavy Ind Ltd | Gasifying apparatus |
| CN104569038A (en) * | 2013-10-11 | 2015-04-29 | 上海锦宜仪器有限公司 | Device and method for combustible gas detection |
| CN206057230U (en) * | 2016-08-22 | 2017-03-29 | 苏州工业园区姑苏科技有限公司 | Combustible gas detecting device in stove |
Non-Patent Citations (1)
| Title |
|---|
| "可燃气体传感器研究进展";宋小坚;《煤气与热力》;20100531;第30卷(第5期);第40-42页 |
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| CN106168591A (en) | 2016-11-30 |
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Effective date of registration: 20190626 Address after: 215104 No. 8 Xishui Road, Wangshan Industrial Park, Yuexi, Wuzhong Development Zone, Suzhou City, Jiangsu Province Patentee after: SUZHOU TIANLONG CHAIN CO., LTD. Address before: 215121 No. 9 Sifang Street, Weiting Town, Suzhou Industrial Park, Jiangsu Province Patentee before: Suzhou Industrial Park Gusu Technology Co., Ltd. |