CN107271365A - A kind of device of on-line determination the escaping of ammonia in situ - Google Patents
A kind of device of on-line determination the escaping of ammonia in situ Download PDFInfo
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- CN107271365A CN107271365A CN201710729906.0A CN201710729906A CN107271365A CN 107271365 A CN107271365 A CN 107271365A CN 201710729906 A CN201710729906 A CN 201710729906A CN 107271365 A CN107271365 A CN 107271365A
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- ammonia
- escaping
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 48
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000013459 approach Methods 0.000 claims abstract description 10
- 239000002196 Pyroceram Substances 0.000 claims abstract description 9
- 239000013307 optical fiber Substances 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 18
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004868 gas analysis Methods 0.000 abstract description 3
- 238000011020 pilot scale process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 18
- 239000003546 flue gas Substances 0.000 description 8
- 238000005070 sampling Methods 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to gas analysis technology field, and in particular to a kind of device of on-line determination the escaping of ammonia in situ, it is characterised in that including measurement pipeline；Described measurement pipeline one end is joined directly together by connector with gas approach pipeline, and the other end is sealed with flange plate；The flange plate center is provided with pyroceram window, and inner side is provided with detection bar, and outside is provided with Laser emission end, laser pick-off end and amplifying circuit；Wherein, the detection bar other end is connected with high temperature resistant speculum, the Laser emission end is connected by optical fiber with generating device of laser in analyzer, and the laser pick-off end is connected with amplifying circuit, and the amplifying circuit is connected by cable with signal processing circuit in analyzer.The apparatus structure of the present invention is simple, it is easy to installation and debugging, and test result is accurate, available for the environment of various test the escaping of ammonia, the SCR denitration that is particularly suitable for use in pilot scale test device.
Description
Technical field
The invention belongs to gas analysis technology field, it is related to a kind of device of on-line determination the escaping of ammonia in situ.
Background technology
Nitrogen oxides produced by fossil energy combustion process（NOx）It is one of topmost atmosphere pollution.In order to control
NOx processed discharge, it is industrial usually using SCR（SCR）Or SNCR（SNCR）Technology takes off
Except the NOx in boiler smoke（That is denitrification process）.The common feature of both technologies is to use ammonia（Or the urine of ammonia can be converted into
Element）Reacted with NOx, generate harmless water and nitrogen.The injection rate of ammonia is the key parameter for controlling SCR or SNCR reactions, injection
NOx extrusion rates are not enough when measuring very few, cause NOx emission exceeded；When ammonia injection rate is excessive, excess of ammonia will be escaped from reactor outlet
Ease, with the sulfur dioxide in flue gas and water reaction generation ammonium sulfate, causes the serious consequences such as equipment corrosion blocking.Therefore, ammonia
Escape is the important monitor control index of denitrification process.For SCR catalyst, the escaping of ammonia be also the important performance indications of catalyst it
One.Either industrial denitration or SCR catalyst performance detection, are required for high-precision the escaping of ammonia detection means.
TDLAS（Tunable Diode Laser Absorption Spectroscopy, tunable semiconductor laser is inhaled
Receive spectrum）It is the mainstream technology of current on-line determination the escaping of ammonia.TDLAS scans an independence using the laser frequency of single arrowband
Gaseous absorption line, with high selectivity, high-resolution, the advantage that speed is fast, sensitivity is high.Current TDLAS is used for the escaping of ammonia
Detection mainly has two ways：
（1）Extraction-type, i.e., extract the sampled pipeline of partial fume into Special sample pond and tested, most of at present independent
Smoke gas analysis equipment uses the method.CN205593918 discloses a kind of denitrification integral on-line computing model, including cabinet,
Air inlet, heating pretreatment device, sampling and calibrating installation, ammonia analytical equipment, data processing and display device, temperature control dress
Put, power and external interface device, heating pretreatment device includes heater, high-temperature ball valve and secondary filter.The ammonia
Analytical equipment includes constant temperature spectrometer and high-temperature gas room, and the high-temperature gas room is connected by pipeline with secondary filter.
CN205826526 discloses a kind of extraction-type the escaping of ammonia monitoring system, including sampling unit, constant temperature pretreatment unit, measurement list
Member and electric control unit, the constant temperature pretreatment unit, measuring unit and electric control unit are located in analysis cabinet；It is described to adopt
Sample unit includes sampling probe and heat tracing sampling pipe, and the constant temperature pretreatment unit includes secondary filter, jet pump, High Temperature Gas
Dynamic valve, stop valve, demarcation valve, source of the gas magnetic valve and pressure regulating unit, the pressure regulating unit include pressure switch, gas
Flowmeter and pressure regulator valve, the measuring unit include measuring cell, Laser emission end, laser pick-off end, instrument controlling unit and shown
Show unit, the electric control unit includes PLC, temperature control unit, switch and binding post.Extraction-type the escaping of ammonia
Test device is typically provided with complex pretreatment unit, the processing such as is filtered, dehumidified to gaseous sample before detection, can
To avoid influence of the composition such as dust to optical system in gas, maintenance period is longer.It is generally relatively thin yet with sampling pipeline,
Sampling flow also very little, when testing the escaping of ammonia, the ammonia of ppm ranks is easily in sampling pipeline adsorption, it is difficult to stablized
Accurate result.
（2）Correlation, i.e., be respectively mounted Laser emission end and receiving terminal in flue both sides, laser is directly entered by flue gas
Row test.CN105259137 provides a kind of pipeline the escaping of ammonia laser absorption spectrum automatic on-line in-situ measurement device, the device bag
Include laser transmitting system, laser receiver system and two welded flange installation units, the laser transmitting system and laser pick-off
System respectively by a welded flange installation unit be fixed on pipeline to penetrating both sides；The laser transmitting system includes first
Plate, laser drive power plate and laser occur for housing, the modulated signal for being arranged on the first enclosure interior and installed in the
Beam expander collimation lens on one housing；The laser receiver system includes the second housing, is arranged on the second enclosure interior
Detector, pre-amplification circuit plate, lock-in amplifier plate, signal-processing board and display screen driving plate and installed in the second housing
On light beam plus lens and display screen.Compared with drawing device, correlation device avoids suction of the ammonia in sampling pipeline
Attached problem is higher for the measurement sensitivity of the escaping of ammonia.But because the test light path of correlation device is equal to flue width, in cigarette
Road can not meet measuring accuracy when narrower, it is impossible to be used in SCR catalyst test system.Further, since flue two side and centre
There is the temperature difference, the actual temperature of optical system for testing is difficult to determine, can influence the accuracy of testing result.Correlation device is also present not
Just the problems such as installing, debug and safeguard complex.
The content of the invention
In order to overcome the shortcomings of existing the escaping of ammonia test device, the invention provides a kind of online in-site detecting the escaping of ammonia
Device.Compared with prior art, device of the invention have it is simple in construction, be easily installed debugging, be easy to safeguard, test result it is accurate
Really the features such as, available for the various scenes for needing to determine the escaping of ammonia, the cooperation SCR catalyst pilot scale performance detection that is particularly suitable for use in system
System is used.
The present invention's is used for the device of on-line determination the escaping of ammonia in situ, it is characterised in that including measurement pipeline；The measurement
Pipeline one end is joined directly together by connector with gas approach pipeline, and the other end is sealed with flange plate；The flange plate center is set
There is pyroceram window, inner side is provided with detection bar, and outside is provided with Laser emission end, laser pick-off end and amplifying circuit；Wherein, institute
State the detection bar other end with high temperature resistant speculum to be connected, the Laser emission end passes through generating device of laser in optical fiber and analyzer
Connection, the laser pick-off end is connected with amplifying circuit, and the amplifying circuit passes through signal processing circuit in cable and analyzer
Connection.
Preferably, the measurement tubing internal diameter is suitable with gas approach pipeline internal diameter, to ensure that air-flow smooth can be flowed through
Pipeline.
It is further preferred that the measurement pipeline inner wall is covered with high temperature resistant amorphous silicon inert coatings, coating layer thickness is 100
~500nm。
Preferably, the connector internal duct shape selected from it is straight-through, upper it is curved, under it is curved in one kind.
Preferably, the detection pole length is 0.2 ~ 2.0 meter, it is highly preferred that 0.5 ~ 1.5 meter.
It is further preferred that the single bar that the detection bar profile is selected from the pipe of perforate on single wall, section is arc
One of plate or the combining structure that is formed by 2 ~ 6 stocks.
Preferably, the heat insulating mattress of center drilling is provided with the inside of the flange plate.
It is further preferred that being additionally provided with outside the measurement pipeline：
One or more electric heaters；
One or more temperature sensors；
Pressure sensor；
Described temperature sensor and pressure sensor probe is located at measurement pipeline inner section immediate vicinity, by cable with dividing
Analyzer is connected.
Embodiment
Fig. 1 is the schematic diagram of the device of the on-line determination the escaping of ammonia in situ according to the present invention.
In figure：1- amplifying circuits；2- Laser emissions end；3- laser pick-ofves end；4- pyroceram windows；5- positioning branch
Frame；6- flange plates；7- measures pipeline；8- electric heaters；9- detection bars；10- high temperature resistant speculums；11- connectors；12- flue gases
Inlet ductwork；13- pressure sensors；14- temperature sensors；15- analyzers；16- exhanst gas outlet pipelines.
Illustrate the device for the on-line determination the escaping of ammonia in situ that the present invention is provided below in conjunction with specific embodiments and the drawings, but
Scope not thereby limiting the invention.
A kind of device of on-line determination the escaping of ammonia in situ of the present invention, including measurement pipeline（7）；The measurement pipeline（7）
One end passes through connector（11）With gas approach pipeline（12）It is joined directly together, other end flange plate（6）Sealing；The flange plate
（6）Center is provided with pyroceram window（10）, inner side is provided with detection bar（9）, outside is provided with Laser emission end（2）, laser pick-off
End（3）And amplifying circuit（1）；Wherein, the detection bar other end is connected with high temperature resistant speculum, the Laser emission end（2）
Pass through optical fiber and analyzer（15）Interior generating device of laser connection, the laser pick-off end（3）With amplifying circuit（1）Connection, institute
State amplifying circuit（1）Pass through cable and analyzer（15）Interior signal processing circuit connection.
Measure pipeline（7）Internal diameter and gas approach pipeline（12）Internal diameter is suitable, to ensure that air-flow smooth can flow through pipeline.
Under normal circumstances, pipeline is measured（7）Internal diameter should be between 5 ~ 30 cm, more preferably between 10 ~ 20 cm, in order to make
Make and install.When applied to SCR catalyst test device, gas approach pipeline（12）Side is connected with measurement pipeline, another
Side directly can be connected with final section reactor outlet.Applied to the feelings that the flue gas flows such as power plant, factory are higher, flue is wider
During condition, bypass can be set on main flue gas pipeline, pipeline is measured as the present apparatus is connected to（7）Gas approach pipeline（12）.
Measure pipeline（7）Exhanst gas outlet downstream exhaust blower need to be generally set, for flue gas flow control.Measure pipeline（7）Length
Usually 0.3 ~ 2.1 meter, more preferably 0.6 ~ 1.6 meter.
Measure pipeline（7）Inwall is covered with high temperature resistant amorphous silicon inert coatings, and coating layer thickness is 100 ~ 500 nanometers.Using
Chemical vapour deposition technique is attached to pipeline inner wall, with high temperature resistant, erosion-resisting feature, to the full extent ammonia can be avoided to inhale
It is attached, it is ensured that test result is accurate.
Connector（11）Internal duct shape selected from it is straight-through, upper it is curved, under it is curved in one kind.It is upper curved or under curved angle do not have
Limitation, is easy to part to ensure that air-flow is unobstructed while connection.
Flange plate（6）For installing optics and electronic component and detection bar.Flange plate（6）Center drilling, center is provided with resistance to
High temp glass window（4）；Outside is provided with Laser emission end（2）, laser pick-off end（3）, amplifying circuit（1）And locating support（5）, its
In, Laser emission end（2）, receiving terminal（3）Position it is freely adjustable, finally by locating support（5）It is fixed.Preferred stripe
Under part, in flange plate（6）Heat insulating mattress and detection bar of the inner side provided with center drilling（9）, wherein, heat insulating mattress is used to completely cut off
Heat from measurement pipeline, it is to avoid flange plate（6）Outside optics and electronic device are damaged or quick aging.
Detection bar（9）The high temperature resistant speculum of its end is arranged on for supporting（10）, make high temperature resistant speculum（10）Surely
Surely it is in light path center.Therefore detection bar（9）Must be sufficiently tight, while stream of the flue gas in detection zone can not be stopped
It is dynamic.Detection bar（9）Length be slightly less than measurement pipeline（7）Length, usually 0.2 ~ 2.0 meter, more preferably 0.5 ~ 1.5
Rice.Detection bar（9）Profile can be the pipe of perforate on single wall, section is arc single batten or formed by 2 ~ 6 stocks
One of combining structure.This measurement apparatus light path is set for individual reflection, and measurement light path is detection bar（9）2 times of length.Laser
Light path is directly related with sensitivity that the escaping of ammonia is determined and detectable concentration lower limit, and light path is longer under normal circumstances, detection sensitivity
Higher, detectable concentration lower limit is lower.
Analyzer（15）It is installed on measurement pipeline（7）In outside frame, inside occurs at module and signal provided with laser
Manage circuit.Module, which occurs, for laser is used to produce the LASER Light Source determined needed for ammonia, and laser delivers to Laser emission end through optical fiber（2）Hair
Penetrate, through pyroceram window（4）Enter measurement pipe road afterwards（7）, bar after testing（9）The high temperature resistant speculum of end（10）After reflection
Return, then by pyroceram window（4）Afterwards by laser pick-off end（3）Sensor receive, be converted to electric signal amplified again
Circuit（1）Send analyzer after processing back to（15）Interior signal processing circuit, and calculate ammonia concentration value.
Need to detect the real time temperature and pressure data in measurement pipeline when calculating ammonia concentration.Can be under optimum condition
Test pipeline（7）Upper mounting temperature sensor（14）And pressure sensor（13）, sensor passes through cable and analyzer（15）Phase
Even, when test condition keeps stable, fixed temperature and pressure value calibration can be used.Temperature sensor（14）Probe and pressure are passed
Sensor（13）Probe should be close to measurement pipeline（7）Kernel of section position, as close possible to but can not block optical path.Some
Under the conditions of, can be along measurement pipeline in order to more accurately obtain the temperature and pressure data in light path（7）Multiple TEMPs are set
Device（14）And pressure sensor（13）.In order to keep measuring pipeline（7）The stabilization of temperature with it is consistent, further preferably measurement pipeline
（7）Outside sets one or more electric heaters（8）, for the heating of gas in pipeline, with measurement pipeline（7）Interior temperature is passed
Sensor（14）Composition control loop, is accurately controlled measurement temperature.
The course of work of device using the on-line determination the escaping of ammonia in situ of the present invention is：
Gas is from gas approach pipeline（12）Into the on-line determination the escaping of ammonia device in situ of the present invention, subsequently into measurement pipeline
（7）, use electric heater（8）It is heated to analyzer（15）Measurement temperature needed for detection, temperature and pressure value temperature sensor
（14）And pressure sensor（13）Detection, analyzer is fed back to by optical fiber（15）.After temperature and pressure numerical stability, point
Analyzer（15）Interior laser occurs module and produces the LASER Light Source determined needed for ammonia, and laser is sent to Laser emission end through optical fiber
（2）Transmitting, through pyroceram window（4）Enter measurement pipe road afterwards（7）, bar after testing（9）The high temperature resistant speculum of end（10）
Returned after reflection, then by pyroceram window（4）Afterwards by laser pick-off end（3）Sensor receive, be converted to electric signal again
Amplified circuit（1）Send analyzer after processing back to（15）Interior signal processing circuit, and determine ammonia concentration value.Measure is finished
Flue gas is from exhanst gas outlet pipeline afterwards（16）Discharge.
Claims (8)
1. a kind of device of on-line determination the escaping of ammonia in situ, it is characterised in that including measurement pipeline（7）；The measurement pipeline（7）
One end passes through connector（11）With gas approach pipeline（12）It is joined directly together, other end flange plate（6）Sealing；The flange plate
（6）Center is provided with pyroceram window（10）, inner side is provided with detection bar（9）, outside is provided with Laser emission end（2）, laser pick-off
End（3）And amplifying circuit（1）；Wherein, the detection bar other end is connected with high temperature resistant speculum, the Laser emission end（2）
Pass through optical fiber and analyzer（15）Interior generating device of laser connection, the laser pick-off end（3）With amplifying circuit（1）Connection, institute
State amplifying circuit（1）Pass through cable and analyzer（15）Interior signal processing circuit connection.
2. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the measurement pipeline（7）
Internal diameter and gas approach pipeline（12）Internal diameter is suitable, to ensure that air-flow smooth can flow through pipeline.
3. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the measurement pipeline（7）
Inwall is covered with high temperature resistant amorphous silicon inert coatings, and coating layer thickness is 100 ~ 500nm.
4. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the connector（11）It is interior
Portion's pipeline shape selected from it is straight-through, upper it is curved, under it is curved in one kind.
5. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the detection bar（9）It is long
Spend for 0.2 ~ 2.0 meter, it is highly preferred that 0.5 ~ 1.5 meter.
6. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the detection bar（9）Outside
Shape is selected from one of the pipe of perforate on single wall, the single batten that section is arc or the combining structure formed by 2 ~ 6 stocks.
7. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the flange plate（6）It is interior
Side is provided with the heat insulating mattress of center drilling.
8. the device of on-line determination the escaping of ammonia in situ according to claim 1, it is characterised in that the measurement pipeline（7）
Outside is additionally provided with：
One or more electric heaters（8）；
One or more temperature sensors（14）；
Pressure sensor（13）；
Described temperature sensor（14）And pressure sensor（13）Probe is located at measurement pipeline（7）Inner section immediate vicinity,
Pass through cable and analyzer（15）Connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710729906.0A CN107271365A (en) | 2017-08-23 | 2017-08-23 | A kind of device of on-line determination the escaping of ammonia in situ |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710729906.0A CN107271365A (en) | 2017-08-23 | 2017-08-23 | A kind of device of on-line determination the escaping of ammonia in situ |
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| CN107271365A true CN107271365A (en) | 2017-10-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443001A (en) * | 2018-02-10 | 2018-08-24 | 江苏大学 | A kind of ammonia concentration distribution tester |
| CN109283157A (en) * | 2018-11-27 | 2019-01-29 | 东南大学 | A high temperature and low pressure multiple reflection pool control system |
| CN109596566A (en) * | 2018-10-29 | 2019-04-09 | 中国科学院合肥物质科学研究院 | A kind of gas detection absorption inside cavity temperature and pressure integrated control unit |
| CN109696522A (en) * | 2018-05-31 | 2019-04-30 | 中电华创(苏州)电力技术研究有限公司 | A kind of Denitration in Boiler flue gas the escaping of ammonia detector with temperature difference adaptation function |
| CN113758920A (en) * | 2021-07-20 | 2021-12-07 | 北京新叶科技有限公司 | Ammonia escape monitoring device |
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