CN104977190A - Sensor device and method for analyzing mixed gas indoors - Google Patents
Sensor device and method for analyzing mixed gas indoors Download PDFInfo
- Publication number
- CN104977190A CN104977190A CN201510238801.6A CN201510238801A CN104977190A CN 104977190 A CN104977190 A CN 104977190A CN 201510238801 A CN201510238801 A CN 201510238801A CN 104977190 A CN104977190 A CN 104977190A
- Authority
- CN
- China
- Prior art keywords
- gas
- housing
- sensor device
- sensor
- flow
- 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
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- 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
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure, temperature
Abstract
For the analysis of a gas located in a process space using a distance from the process chamber arranged gas sensor, a gas flow of the gas to be analyzed has to be generated from the space to the gas sensor. The gas sensor is arranged in a housing which is connected via a gas supply line with the space. The housing includes a sound transducer for the generation of the gas flow in the housing. The transducer creates a suction, which causes gas is drawn from the process chamber via the gas supply to the housing and to the gas sensor in the housing.
Description
Technical field
The present invention relates to the gas the mixed gas being present in process chamber being analyzed and causes especially worthily and will analyze from process room to the flowing of process room at a distance of the gas sensor arranged.
Background technology
When the commercial unit producing or process gas runs, must monitor its parameter, such as composition, temperature etc., thus will use corresponding gas sensor.But such gas sensor can not directly be located usually on measurement place, because there exists the unaccommodated condition of sensor, such as too high temperature.But in order to can gas parameter be determined, require sensor and measure place with suitable Distance positioning.The gas analyzed must be carried to gas sensor from measuring place by the conveyance conduit be applicable in this case.
Such as in DE 10 2,012 217 596, be that the corrosive conditions measured in thermo-power station boiler uses sensor device, this sensor device has band and leads to transducer room outside the air flow guiding device through boiler wall of boiler internal opening and boiler.The burning be used in detection boiler is set in transducer room and carries out stoichiometric sensing element, so that in addition for improving efficiency and being limiting emission and monitor burning.But the sensor in transducer room is provided separately with the measurement place of itself.
If measurement gas is in and has low pressure or generally have in the region of variable pressure conditions now, so for guaranteeing continuously and monitoring reliably, must initiatively gas be carried from measurement place to sensing element.Generally use independent pump, it extracts a part of gas from measuring place and carries to the sensing element in transducer room for this reason.But the pump of this outside, for being an additional spending total system, meanwhile, except corresponding fringe cost, also adversely shows the limited safety in operation of pump and final serviceable life.
For avoiding by using these shortcomings of causing of pump, system such as can without pump operation, wherein, as gas from the diffusion of measuring place and utilizing gas originally to exist to the transport establishment of sensing element.But this point is obviously delayed measurement.
Summary of the invention
Therefore the technical problem to be solved in the present invention is, a kind of method for analytic process indoor gas is provided, wherein itemize above relevant from process room to gas sensor produce air-flow shortcoming be eliminated and ensure that the run duration of gas sensor at device is by gas overcurrent.
Above-mentioned technology is asked questions and to be solved by a kind of sensor device for analytic process indoor gas and a kind of method for analytic process indoor gas.。
Gas for analytic process indoor has housing and the gas sensor for analyzing gas at least partially according to sensor device of the present invention, and wherein, gas sensor to be arranged in housing really on allocation.Sensor device has steam line in addition, for being connected with process room by housing, being transported to by a part of gas in housing and determining position from process room.Sensor device comprises the gas exhaust duct for being discharged from housing by gas in addition.The feature of sensor device is acoustic wave converter, for gas at least partially being produced from process room by really allocation proceeding to the air-flow of gas exhaust duct in steam line to housing.
Advantageously reach the determination of leading to gas sensor and reliable air-flow thus.
The expansion design example of sensor device is as follows:
Acoustic wave converter can be the ultrasonic vibration unit of a ultrasonic sensor, particularly piezoelectricity.The ultrasonic vibration unit of piezoelectricity, except the supersonic oscillations of itself, also produces from the outside air-flow of converter, so-called ultrasound wave wind.They are very little in audio frequency and amplitude, firmly flexible.Tool is advantageous, and acoustic wave converter does not comprise moving component, and this moving component is polluted and breaks down and can not bear noticeable wear.
-sensor device can comprise the control electronic installation for acoustic wave converter, and this control electronic device design is, produces the sound wave of frequency higher than 25kHz by acoustic wave converter.In other words, the ultrasound wave not producing noise burden is used.
Sensor device can comprise the heating arrangement for gas in heated shell, and with releasing heat convection current and comprise tedge, wherein, tedge is arranged like this, makes gas be increased in tedge by the part of heating devices heat.Produce the power of additional enhancing air-flow thus.
-heating arrangement can comprise the heating to gas sensor sensing element.If gas sensor natively heats, the heating arrangement of gas sensor so can be utilized to strengthen air-flow simultaneously, as long as there is tedge, a namely part for housing or steam line, this part is in operation in horizontal outside and upwards extends from the place of heating.
-heating arrangement can comprise Peltier element.This element is a kind of undersized thermal source.Particularly preferably be, also there is downtake except tedge and also Peltier element is set in housing, making it be driven in the region of tedge in the region of heat from downtake.
-sensor device can comprise semiconductor-based gas sensor.This gas sensor is simple and be convenient to manufacture and have high sensitivity under low selectivity, is therefore particularly suitable under narrow specific environment, such as, using in combustion.
-sensor device preferably can use in the firing chamber of power house.Firing chamber comprises the chamber wall and sensor device that limit firing chamber, and wherein, steam line and gas exhaust duct are arranged with running through chamber wall.Such as, sensor device particularly adopts in the through-flow boiler of the steam generator flue gas of combustion of fossil fuel at thermo-power station and uses, for measuring CO and/or CO in flue gas
2and/or O
2concentration.
For analytic process indoor gas according in method of the present invention,
-be arranged on for the gas sensor analyzing gas at least partially the position determined in housing,
-housing is connected with process room with gas exhaust duct by steam line,
-at least partially gas produce from process room by really allocation proceeding to the air-flow of gas exhaust duct in steam line to housing.Air-flow produces by acoustic wave converter.
According to the present invention, the gas therefore will measured is using under the airflow condition produced by acoustic wave converter, from process room by steam line suction casing.At the inswept gas sensor of gas and by after this gas sensor analysis, gas is again discharged from housing by gas exhaust duct and is such as turned back to process chamber.
According to the application of device, return course is not indoor generally also can to make gas, but is discharged into air or other suitable places, and that is, gas exhaust duct is not connected with process room.
But in the firing chamber being used in power house, due to the lower speed that can reach in flowing velocity very high in firing chamber and housing preferably, steam line and gas exhaust duct get close to very much each other together with pass in firing chamber.Such as, steam line and gas exhaust duct can import in firing chamber coaxially, to be remained in degree little as far as possible by the pressure reduction in steam line and gas exhaust duct.
In framework of the present invention, concept " vertically " and " level " relate to the overall coordinate system determined according to Action of Gravity Field.Similarly also be applicable to concept as " upwards " and " downwards ".
Accompanying drawing explanation
Now preferred to the present invention by accompanying drawing, but the embodiment being not limited only to this is described in detail.In this regard, unique accompanying drawing illustrates the first embodiment of the sensor device for analytic process indoor gas.
Embodiment
Fig. 1 illustrates the part according to the firing chamber 3 in the thermo-power station of one embodiment of the present of invention.The gas 2 that firing chamber 3 comprises chamber wall 30 and is in firing chamber, such as flue gas.Part according to Fig. 1 is the view observed from above in this regard.
Chamber wall 30 is passed by steam line 21 and gas exhaust duct 22.Article two, pipeline 21,22 is for the part 5 to gas sensor 10 conduction gas 2 be arranged on outside firing chamber 3, because the rugged surroundings in firing chamber 3 and temperature do not allow gas sensor 10 to run in firing chamber.Steam line 21 and gas exhaust duct 22 to be arranged in the region of chamber wall 30 and steam line 21 forms inner part in this case coaxially at this.Steam line 21 also can be designed to external pipe when coaxial air guide.
The particulate filter 19 being used for the thick contamination particle of filtering is set in steam line 21.By after particulate filter 19, be inhaled into gas fraction 5 in steam line from the by-pass flow of gas sensor 10 own.The miscellaneous part of gas sensor 10 and sensor device is arranged in the housing 20 outside chamber wall 30 in the case.Gas sensor 10 comprises the one or more sensing elements for analytical gas part 5.Sensing element can be such as high-temperature gas sensors, such as, as the semiconductor gas sensor of gallium oxide.Gas sensor 10 is connected with the control electronic installation 50 of analyzing and processing sensing data with for reading.
After flowing over from gas sensor 10 side, the part 5 of gas 2 is by continuation conveying and enter in pipeline at this.In this regard, this gas fraction is crossed from ultrasonic oscillation unit 15 by-pass flow and is entered in resonantron 16.
Resonantron does not have special character to gas 2.It and oscillating unit 15 match relatively over its length with on width.Oscillating unit 15 controls by controlling electronic installation 50.Preferably, the ultrasound wave of such as wavelength 30kHz is produced by the oscillating unit 15 encouraged by piezoelectric structure in this example.Other possible wavelength are 25kHz, 50kHz or 100kHz.When using the ultrasonic frequency of 30kHz, to the preferred numerical value of the diameter of resonantron 16 hyperacoustic wavelength exactly, namely about 1cm.As the length of resonantron, the several times of this wavelength preferably can be used, such as 3cm.By selected numerical value, flowing velocity, is namely enhanced by the suction effect of the air-flow of ultrasonic sensing.
Gas 2, after resonantron 16, again leaves the region of sensor device by gas exhaust duct 22 and turns back in firing chamber 3.By coaxially arranging steam line 21 and gas exhaust duct 22, pressure reduction possible between these mouths of pipe is minimized.Do like this and there is advantage, therefore make the impact or even capped being only subject to flowing in firing chamber 3 by the suction effect of sound wave as small as possible.
In a kind of expansion design of modification, thermal convection can be used as the expulsive force of air-flow except sound wave.For this reason suitable, be provided with at least one tedge.In other words, the part 5 of gas 2 pipe fitting that to run under the running status of gas 2 in the inside of housing 20 and flow direction rises.If gas is at this heated in areas, so it is subject to a kind of power upwards in tedge, contributes to like this promoting air-flow.Such as shown in Fig. 1, such rotation can will be set for this reason, make resonantron 16 in housing 20, be used as tedge towards the pipe of downstream and extension in parallel.Such as Fig. 1 can be considered as side view for this reason.
If gas sensor 10 such as natively comprises suitable heating element to make the semiconductor gas sensor of gallium oxide run, the gas 2 so skimming over gas sensor 10 is also upwards flowed by the heat temperature raising of gas sensor 10 and is therefore promoted air-flow.
Claims (11)
1., for a sensor device for analytic process room (3) interior gas (2), comprise
-housing (20),
-for analyzing the gas sensor (10) of gas (2) at least partially, wherein, gas sensor (10) to be arranged in housing (20) really on allocation,
-for connecting the steam line (21) of housing (20) and process room (3), a part of gas (2) is transported in housing (20) and the described position determined from process room (3) by it,
-for the gas exhaust duct (22) from described housing (20) Exhaust Gas (2),
It is characterized in that
Acoustic wave converter (15), produces from process room (3) by really allocation proceeding to the air-flow of gas exhaust duct (22) in steam line (21) to housing (20) for making gas (2) at least partially.
2., by sensor device according to claim 1, wherein, acoustic wave converter (15) is the ultrasonic vibration unit (15) of piezoelectricity.
3. by the sensor device described in claim 1 or 2, there is the control electronic installation (50) for acoustic wave converter (15), wherein, control electronic installation (50) to be designed to, produce the sound wave of frequency higher than 25kHz by acoustic wave converter (15).
4., by the sensor device that one of aforementioned claim is described, there is the heating arrangement for heating the gas (2) in described housing (20), with releasing heat convection current; And there is tedge, wherein, tedge is arranged like this, makes being risen in tedge by the part of heating devices heat of gas (2).
5., by sensor device according to claim 4, wherein, described heating arrangement comprises the heating for gas sensor sensing element (10).
6., by the sensor device described in claim 4 or 5, wherein, described heating arrangement comprises Peltier element.
7., by the sensor device that one of aforementioned claim is described, wherein, described gas sensor (10) is semiconductor-based gas sensor (10).
8. by the sensor device that one of aforementioned claim is described, wherein, air-flow is run by resonantron (16) in housing (20) and acoustic wave converter (15) is arranged facing to resonantron (16) in end face side, wherein, and resonantron (16)
-have substantially produced wave length of sound diameter and/or
-there is the length of the multiple integral multiple of substantially produced wave length of sound.
9. the firing chamber (3) of a power house, comprises
The chamber wall (30) of-restriction firing chamber (3),
-by the sensor device one of aforementioned claim Suo Shu,
Wherein, steam line (21) and gas exhaust duct (22) are arranged with running through chamber wall (30).
10. by the application of the sensor device according to any one of claim 1 to 8 particularly in the boiler that thermo-power station adopts the steam generator flue gas of combustion of fossil fuel through-flow, for measuring CO and/or CO in flue gas
2and/or O
2concentration.
11. 1 kinds of methods for analytic process room (3) interior gas (2), wherein
-position of the determination in housing (20) is arranged on for the gas sensor (1O) analyzing gas (2) at least partially,
-housing (20) is connected with process room (3) with gas exhaust duct (22) by steam line (21),
-at least partially gas (2) produce from process room (3) by really allocation proceeding to the air-flow of gas exhaust duct (22) in steam line (21) to housing (20),
It is characterized in that, described air-flow produces by acoustic wave converter (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014203863.4 | 2014-03-04 | ||
| DE102014203863.4A DE102014203863A1 (en) | 2014-03-04 | 2014-03-04 | Sensor device and method for analyzing a gas mixture in a process space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104977190A true CN104977190A (en) | 2015-10-14 |
Family
ID=53883891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510238801.6A Pending CN104977190A (en) | 2014-03-04 | 2015-03-04 | Sensor device and method for analyzing mixed gas indoors |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104977190A (en) |
| DE (1) | DE102014203863A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007109A (en) * | 2019-12-24 | 2020-04-14 | 华中科技大学 | Gradient microporous filtration gas sensor and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021107594A1 (en) | 2021-03-25 | 2022-09-29 | Endress+Hauser Group Services Ag | Sensor for determining a measurand and method for a measurand with a sensor |
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| US5525041A (en) * | 1994-07-14 | 1996-06-11 | Deak; David | Momemtum transfer pump |
| US6010316A (en) * | 1996-01-16 | 2000-01-04 | The Board Of Trustees Of The Leland Stanford Junior University | Acoustic micropump |
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| CN101360679A (en) * | 2005-12-09 | 2009-02-04 | 京瓷株式会社 | Fluid actuator, heat generating device using the same, and analysis device |
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-
2014
- 2014-03-04 DE DE102014203863.4A patent/DE102014203863A1/en not_active Withdrawn
-
2015
- 2015-03-04 CN CN201510238801.6A patent/CN104977190A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3743446A (en) * | 1971-07-12 | 1973-07-03 | Atek Ind Inc | Standing wave pump |
| US5525041A (en) * | 1994-07-14 | 1996-06-11 | Deak; David | Momemtum transfer pump |
| US6010316A (en) * | 1996-01-16 | 2000-01-04 | The Board Of Trustees Of The Leland Stanford Junior University | Acoustic micropump |
| CN1347498A (en) * | 1999-04-14 | 2002-05-01 | 伊德斯德国股份有限公司 | Semiconductor gas sensor with housing and method for measuring of gas concentrations |
| DE20103246U1 (en) * | 2001-02-23 | 2002-03-28 | Siemens Ag | pump |
| CN101360679A (en) * | 2005-12-09 | 2009-02-04 | 京瓷株式会社 | Fluid actuator, heat generating device using the same, and analysis device |
| DE102008000372A1 (en) * | 2008-02-21 | 2009-08-27 | Robert Bosch Gmbh | Exhaust gas measuring device for internal combustion engine, has exhaust sensor arranged such that gas outlet of protective pipe leads directly into output channel of flow sampling component |
| CN103003536A (en) * | 2010-05-14 | 2013-03-27 | 沙勒工业自动化技术两合公司 | System and method for determining readings of gases and/or an aerosol for a machine |
| CN103109173A (en) * | 2010-09-22 | 2013-05-15 | 罗伯特·博世有限公司 | Sensor arrangement |
| CN103492873A (en) * | 2011-04-29 | 2014-01-01 | 罗伯特·博世有限公司 | Sensor apparatus for detecting a parameter of a flowing fluid medium |
| CN202075156U (en) * | 2011-05-31 | 2011-12-14 | 安徽蓝盾光电子股份有限公司 | Smoke-gas online monitoring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007109A (en) * | 2019-12-24 | 2020-04-14 | 华中科技大学 | Gradient microporous filtration gas sensor and preparation method thereof |
| CN111007109B (en) * | 2019-12-24 | 2021-05-18 | 华中科技大学 | Gradient microporous filtration gas sensor and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014203863A1 (en) | 2015-09-10 |
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Application publication date: 20151014 |
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