CN109406435A - The continuous on-line monitoring system of flue gas - Google Patents
The continuous on-line monitoring system of flue gas Download PDFInfo
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- CN109406435A CN109406435A CN201811534954.5A CN201811534954A CN109406435A CN 109406435 A CN109406435 A CN 109406435A CN 201811534954 A CN201811534954 A CN 201811534954A CN 109406435 A CN109406435 A CN 109406435A
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- flue gas
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- line monitoring
- monitoring system
- temperature section
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- 239000003546 flue gas Substances 0.000 title claims abstract description 140
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 238000012544 monitoring process Methods 0.000 title claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000009423 ventilation Methods 0.000 claims abstract description 29
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 21
- 238000005070 sampling Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- 239000003595 mist Substances 0.000 claims description 10
- 239000011229 interlayer Substances 0.000 claims description 3
- 239000013028 medium composition Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003708 ampul Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 7
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 6
- 238000002211 ultraviolet spectrum Methods 0.000 abstract description 5
- 238000004566 IR spectroscopy Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 24
- 239000007789 gas Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- 238000005259 measurement Methods 0.000 description 10
- 239000002028 Biomass Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000000862 absorption spectrum Methods 0.000 description 8
- 238000010248 power generation Methods 0.000 description 7
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 7
- 238000004056 waste incineration Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000002452 interceptive effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 flue gas Compound Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000002699 waste material Substances 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Abstract
The invention discloses the continuous on-line monitoring systems of flue gas, comprising: flue sampler, heat tracing pipe, flue gas pretreatment system, HC remover and flue gas concentration analyzer, wherein heat tracing pipe is connected with flue sampler；Flue gas pretreatment system is connected with heat tracing pipe, and is suitable for carrying out flue gas the pretreatment before concentration analysis；The upstream or downstream of flue gas pretreatment system is arranged in HC remover, and HC remover includes ventilation pipe and heating element, and heating element is suitable for the flue gas passed through in ventilation pipe to 200 degrees Celsius or more；Flue gas concentration analyzer is connected with flue gas pretreatment system or HC remover.Therefore, the continuous on-line monitoring system of the flue gas can effectively eliminate the interference that hydrocarbon detects ultraviolet spectra or infrared spectroscopy, improve the accuracy of flue gas inspection.
Description
Technical field
The invention belongs to flue gas inspection fields, specifically, the present invention relates to the continuous on-line monitoring systems of flue gas.
Background technique
The continuous on-line monitoring system of flue gas is the equipment continuously monitored on-line to stationary source sewage draining exit, passes through 24
Hour continual monitoring sewage draining exit polluter, such as SO2With the concentration of NOx, realize Environmental Protection Agency to stationary source enterprise
Blowdown condition monitoring.The continuous on-line monitoring system of flue gas is generally divided into flue gas pretreatment part, flue gas concentration analysis part sum number
It is grouped as according to storage upload unit.
Flue gas pretreatment part extracts the flue gas of sewage draining exit out sewage draining exit, and it is dense to be sent into flue gas after pre-processing to flue gas
Degree analyzer is analyzed.Since flue gas has high temperature, high humidity, characteristic dusty, whole heat tracing is needed in sampling process,
The temperature of heat tracing needs to install the dust filter unit of small-bore in sampler front generally at 140 degree, so that into heat tracing
The flue gas of pipe is free of dust particles.When flue gas enters that analyzer is small behind the house by heat tracing pipe, one 4 degree of condensation can be passed through
Flue-gas temperature is reduced to 4 degree rapidly by device, so that most of moisture condensation in flue gas is liquid water and is arranged by peristaltic pump
Cabin out.The process of flue gas condensing must be very fast, otherwise the SO in flue gas2It is to be measured to cause that gas can be dissolved in condensed water
The loss of concentration of component.Pretreated flue gas squeezes into point that flue gas concentration analyzer carries out pollutant concentration by sampling pump
Analysis.
Flue gas concentration analyzer currently on the market mainly has ultraviolet spectroscopy and two kinds of infra-red sepectrometry.Two methods
Principle is all: according to the Beer-Lambert law of gas molecules sorb, light beam passes through the sample gas in analysis cell,
Since gas is to the absorption of light, light energy will decay, and is tested absorption of the gas in af at wavelength lambda to light intensity, can be used to
Lower formula accurate description:
In formula:
I0(λ) --- incident light is in af at wavelength lambda relative intensity；
I (λ) --- emergent light is in af at wavelength lambda relative intensity；
L --- light path；
Ci--- i-th kind of gas concentration；
σi(λ) --- the absorption coefficient of i-th kind of gas；
ε (λ) --- extinction coefficient caused by the factors such as KPT Scatter.
The difference of ultraviolet spectroscopy and infra-red sepectrometry is for monitoring SO2With the spectral wavelength ranges of NOx, ultraviolet method
Ultraviolet band of the wave-length coverage in 200-400nm, middle infrared band of the wave-length coverage that infrared method uses in 3-6um.
For ultraviolet method and infrared method flue gas concentration analyzer, scene is other using the greatest problem being likely encountered
The absorption bands and SO of gas molecule2It is identical with the absorption bands of NOx, cause cross jamming.Fortunately, most flue gases
The scene that continuous on-line monitoring system uses there's almost no this kind of interference gas, so the continuous on-line monitoring system of flue gas is big
Part occasion can normal use.But for particular applications such as biomass power generation, waste incinerations, due to the combustion used
Material is some wastes, and the structure of matter is very complicated, and due to fuel problem, it is difficult to which full combustion exists and do not fill largely
The intermediate product of divided combustion, such as HC substance.And HC substance spectrally exists largely in absorption line, from ultraviolet to infrared
All exist.In ultraviolet fluctuation, HC substance can absorb the wavelength of 300nm once, and the flue gas analyzer of ultraviolet spectroscopy is caused to exist
There are great errors in the measurement of NO.And in infrared band, the absorption spectrum of HC substance just with SO2Measure spectrum weight
It closes, it can serious influence SO2Measurement.Show currently, generating a large amount of HC interfering substances to this biomass power generation, waste incineration
, ultraviolet spectroscopy flue gas monitoring system and infrared method flue gas monitoring system all can not normal uses.
Therefore, the existing continuous on-line monitoring system of flue gas is further improved at present.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of flue gas that can be effectively eliminated hydrocarbon and interfere ultraviolet spectra or infrared spectroscopy inspection
Continuous on-line monitoring system.
According to an aspect of the present invention, the invention proposes a kind of continuous on-line monitoring systems of flue gas, according to the present invention
Embodiment, the continuous on-line monitoring system of the flue gas includes:
Flue sampler；
Heat tracing pipe, the heat tracing pipe are connected with the flue sampler；
Flue gas pretreatment system, the flue gas pretreatment system are connected with the heat tracing pipe, and are suitable for carrying out flue gas dense
Pretreatment before degree analysis；
The upstream or downstream of the flue gas pretreatment system is arranged in HC remover, the HC remover, and the HC is gone
Except device includes ventilation pipe and heating element, the heating element is suitable for the flue gas passed through in the ventilation pipe extremely
200 degrees Celsius or more；
Flue gas concentration analyzer, the flue gas concentration analyzer and the flue gas pretreatment system or the HC remover
It is connected.
HC remover is provided in the continuous on-line monitoring system of the flue gas of the embodiment of the present invention as a result, flue gas is gone by HC
Except device ventilation pipe when, heating element can be to the flue gas in ventilation pipe to 200 degrees Celsius or more.And then it can incite somebody to action
HC substance is lighted, and HC burning conversion is not had for water and carbon dioxide it is possible thereby to effectively eliminate the HC compound in flue gas simultaneously
There is generation harmful substance.And then it is possible to prevente effectively from interference of the HC substance to subsequent flue gas analyzer measurement result, so that
The continuous on-line monitoring system of flue gas can be monitored the flue gas containing high concentration HC, while improve the accurate of monitoring concentration
Degree.In addition, can make ultraviolet spectroscopy flue gas monitoring and infrared method flue gas monitoring that can answer due to increasing above-mentioned HC remover
For the operating condition scene of a large amount of HC interfering substances of the generations such as biomass power generation, waste incineration, and then it is continuous to significantly improve flue gas
The scope of application of on-line monitoring system.
In addition, the continuous on-line monitoring system of flue gas according to the above embodiment of the present invention can also have following additional skill
Art feature:
In some embodiments of the invention, the flue gas pretreatment system includes:
Condenser, the condenser are connected with the HC remover or the heat tracing pipe；
Sampling pump, the sampling pump are connected with the condenser；
Acid mist filter, the acid mist filter are connected with the sampling pump；
Nitrogen oxides converter, the nitrogen oxides converter are connected with the acid mist filter.
In some embodiments of the invention, the ventilation pipe is formed by metal tube or quartz ampoule.
In some embodiments of the invention, the ventilation pipe is made of the room temperature section of intermediate high temperature section and both ends,
The heating element is suitable for heating the high temperature section.
In some embodiments of the invention, the outer diameter of the ventilation pipe is 0.5-30mm, the length of the high temperature section
0.1-25m。
In some embodiments of the invention, the room temperature section at both ends is 20cm.
In some embodiments of the invention, the heating element is suitable for high temperature section heating 200-1500 is Celsius
Degree.
In some embodiments of the invention, the high temperature section spirals into cylindrical shape or serpentine-like squarely of spiraling.
In some embodiments of the invention, the heating element is by the snorkel that is set on the outside of the high temperature section tube wall
The heat medium composition that road and interlayer are passed through.
In some embodiments of the invention, the high temperature section spirals into cylindrical shape, and the heating element is heating rod, institute
It states heating rod the high temperature section is set and spiral in the cylinder to be formed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the continuous on-line monitoring system of flue gas according to an embodiment of the invention.
Fig. 2 is the structural representation of HC remover in the continuous on-line monitoring system of flue gas according to an embodiment of the invention
Figure.
Fig. 3 is the structural representation of HC remover in the continuous on-line monitoring system of flue gas according to an embodiment of the invention
Figure.
Fig. 4 is the uv absorption spectra that flue gas according to an embodiment of the invention is continuously monitored on-line.
Fig. 5 is the uv absorption spectra that flue gas according to an embodiment of the invention is continuously monitored on-line.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The present invention is completed based on following discovery:
Current existing HC remover mostly uses film permeation principle, that is, utilizes film two sides HC concentration difference so that HC from
High concentration side penetrates into low concentration side, and low concentration side is realized by the way that cleaned air purging is ceaselessly added, to remove
The HC substance at high concentration end.But this HC remover is fatal using then haveing the defects that at flue gas monitoring scene.Flue gas first
In have some pollutants more and can directly result in film poisoning and fail, secondly the concentration of this kind of HC remover requirement HC cannot be too
Height, otherwise film can equally fail.Therefore, this kind of HC remover is not particularly suited for the processing of removal flue gas.
For this purpose, according to an aspect of the present invention, the invention proposes a kind of continuous on-line monitoring systems of flue gas.Join below
It examines Fig. 1 and the continuous on-line monitoring system of flue gas according to an embodiment of the present invention is described in detail.
According to a particular embodiment of the invention, the continuous on-line monitoring system of flue gas includes: flue sampler 100, heat tracing pipe
200, flue gas pretreatment system 300, HC remover 400 and flue gas concentration analyzer 500.
Wherein, heat tracing pipe 200 is connected with flue sampler 100；Flue gas pretreatment system 300 is connected with heat tracing pipe 200, and
Suitable for the pretreatment before flue gas progress concentration analysis；HC remover 400 be arranged in flue gas pretreatment system 300 upstream or
Downstream, it includes ventilation pipe 410 and heating element 420 that HC, which removes 400 devices, and heating element 420 is suitable for leading to in ventilation pipe 410
The flue gas crossed is to 200 degrees Celsius or more；Flue gas concentration analyzer 500 and flue gas pretreatment system 300 or HC remover
400 are connected.
HC remover is provided in the continuous on-line monitoring system of the flue gas of the embodiment of the present invention as a result, flue gas is gone by HC
Except device 400 ventilation pipe 410 when, heating element 420 can to the flue gas in ventilation pipe 410 to 500 degrees Celsius with
On.And then HC substance can be lighted, it is water and carbon dioxide by HC burning conversion, it is possible thereby to effectively eliminate the HC in flue gas
Compound, while without generating harmful substance.In turn it is possible to prevente effectively from HC substance is to subsequent flue gas analyzer measurement result
Interference, so that the continuous on-line monitoring system of flue gas can be monitored the flue gas containing high concentration HC, while improving prison
Survey the accuracy of concentration.In addition, ultraviolet spectroscopy flue gas monitoring and infrared method cigarette can be made due to increasing above-mentioned HC remover
Gas monitoring can be applied to the operating condition scene of a large amount of HC interfering substances of generations such as biomass power generation, waste incineration, and then significantly mention
The high scope of application of the continuous on-line monitoring system of flue gas.
According to a particular embodiment of the invention, flue gas pretreatment system 300 includes: condenser 310, sampling pump 320, acid mist
Filter 330 and nitrogen oxides converter 340.Wherein, the condenser 310 and the HC remover 400 or the heat tracing
Pipe 200 is connected；The sampling pump 320 is connected with the condenser 310；The acid mist filter 330 and 320 phase of sampling pump
Even；The nitrogen oxides converter 340 is connected with the acid mist filter 330.It is possible thereby to effectively be located in advance to flue gas
Reason improves the accuracy rate of flue gas concentration analysis.
According to a particular embodiment of the invention, the ventilation pipe 410 of HC remover 400 is tubular by metal tube or quartz
At.Thus have higher by thermal energy power.200 degrees Celsius or more can be heated to, and then can be effectively to snorkel
Flue gas in road 410 is heated.
According to a particular embodiment of the invention, the outer diameter of ventilation pipe 410 is 0.5-30mm.It specifically, can be using outer
Diameter is the ventilation pipe of 0.5mm, 1mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm specification.Inventors have found that ventilation pipe
Caliber be not easy too large or too small, be easy to cause the too big heating of exhaust gas volumn uneven if caliber is excessive, lead to nytron
Object removal is not thorough, and flue gas conveying speed can be reduced if caliber is too small, is unable to satisfy flue gas measurement request.
According to a particular embodiment of the invention, any catalyst or particulate matter cannot be filled in ventilation pipe 410, avoided
SO2Gas absorption ventilation pipe 31 0 inner surface, thus the accuracy of impact analysis instrument measurement of concetration.
According to a particular embodiment of the invention, since temperature is higher in use for ventilation pipe 410, in order to avoid right
Adjacent heat tracing pipe 200 and condenser 310 impacts.Specific example according to the present invention, by ventilation pipe 410 by centre
High temperature section 411 and the room temperature section 412 at both ends composition, heating element 420 only heat the high temperature section 411 to middle position.
It can achieve temperature buffer and flue gas cool-down effect from there through room temperature section 412 has been reserved respectively at the both ends of ventilation pipe 410
Fruit, and then effectively high temperature is avoided to impact adjacent heat tracing pipe 200 and condenser 310.
The length of specific example according to the present invention, the room temperature section 412 at both ends is 20cm.Thus when high temperature section is heated to
At 200 degrees Celsius or more, it is possible to prevente effectively from being impacted to heat tracing pipe 200 and condenser 310, while the room temperature section in downstream
412 have suitable length, it is also possible that the flue gas of high temperature obtains effective temperature-reducing, and then avoid increasing subsequent condensation device 310
Energy consumption.
In addition, according to a particular embodiment of the invention, the length 0.1-25m of high temperature section 411.It is possible thereby to guarantee to flue gas
Abundant heating so that hydrogen compound fully burning conversion Cheng Shui and carbon dioxide, and then avoid hydrocarbon to rear
The interference of continuous testing result, improves the accuracy of detection.
According to a particular embodiment of the invention, heating element is suitable for high temperature section heating 200-1500 degrees Celsius.Such as it can
Think 250 degrees Celsius, 300 degrees Celsius, 400 degrees Celsius, 500 degrees Celsius, 600 degrees Celsius, 700 degrees Celsius, 500 degrees Celsius, 900
Degree Celsius, 1100 degrees Celsius, 1200 degrees Celsius, 1300 degrees Celsius, 1400 degrees Celsius, 1500 degrees Celsius.Preferably.Heating element
Suitable for high temperature section is heated 500-1000 degrees Celsius.Thus it is heated in the temperature range, can effectively ensure that removal big portion absolutely
Divide HC substance, while can guarantee the SO that flue gas needs to measure2, NOx gas do not react by because of excessively high temperature, thus
It avoids influencing measurement result.Specifically, it can be heated to.And specific temperature can also be according to the size of interference hydro carbons concentration
It is adjusted, and then guarantees to be effectively removed most HC substances.
According to a particular embodiment of the invention, as Figure 2-3, above-mentioned high temperature section 411 can spiral into cylindrical shape, or
Serpentine-like squarely of spiraling.It is possible thereby to save space.
According to a particular embodiment of the invention, heating element 420 can be by the snorkel that is set on the outside of high temperature section tube wall
The heat medium composition that road and interlayer are passed through.It is possible thereby to the ventilation pipe and high temperature section using heating element form collet, in
Between heat medium high temperature section is heated, this kind of heating method can heat all tube walls of high temperature section, thus heat
It is more efficient, and heat more uniform, it thereby may be ensured that cigarette hydrocarbon in gas effectively removes.
According to a particular embodiment of the invention, above-mentioned high temperature section 411 can spiral into cylindrical shape, and heating element 420 can be with
For heating rod, and heating rod is spiraled by the way that high temperature section 411 is arranged in and is heated in the cylinder to be formed to high temperature section 411.
According to a particular embodiment of the invention, there is flue gas concentration analyzer ultraviolet spectra detector or infrared spectroscopy to examine
Survey device.There can be the hydrocarbon removed in flue gas by the way that HC remover is arranged.And it is dense for ultraviolet method and infrared method flue gas
It spends for analyzer, there are a large amount of burn incompletelies in the flue gas generated in particular fields such as biomass power generation, waste incinerations
Intermediate product, such as HC substance.And HC substance spectrally exists largely in absorption line, all exists from ultraviolet to infrared.
In ultraviolet fluctuation, HC substance can absorb 300nm wavelength below, cause the flue gas analyzer of ultraviolet spectroscopy in the measurement of NO
On there are great errors.And in infrared band, the absorption spectrum of HC substance just with SO2Measure spectrum be overlapped, can be tight
The influence SO of weight2Measurement.And it is removed in the continuous on-line monitoring system of flue gas of the above embodiment of the present invention by being provided with HC
Device can have the hydrocarbon in removal flue gas, and then it is possible to prevente effectively from subsequent use ultraviolet spectra detector or infrared
Spectroscopic detector is to NO or SO2Concentration mensuration interfere, significantly improve the accuracy of measurement.Therefore, the present invention is implemented
The continuous on-line monitoring system of flue gas of example can be applied to the work of a large amount of HC interfering substances of the generations such as biomass power generation, waste incineration
Condition scene.
Embodiment
Be respectively adopted the embodiment of the present invention the continuous on-line monitoring system of flue gas and it is existing do not have HC remover flue gas
Continuous on-line monitoring system respectively detects flue gas.
Wherein, the continuous on-line monitoring system of the flue gas of the embodiment of the present invention include: flue sampler 100, heat tracing pipe 200,
HC remover 400, condenser 310, sampling pump 320, acid mist filter 330, nitrogen oxides converter 340 and flue gas concentration analysis
Instrument 500, the outer diameter in 400 Center Vent tube road of HC remover are 3.2mm, the length 2.0m of high temperature section, the length of the room temperature section at both ends
For 20cm, heating element is suitable for the high temperature section heating 550 degrees Celsius.Flue gas concentration analyzer is ultraviolet spectra detection,
Detection wavelength is 195-320nm.
The result of on-the-spot test is shown in Fig. 4-5.Fig. 4 is without the continuous on-line monitoring system of HC remover flue gas respectively to cigarette
The result that gas is detected；Fig. 5 is the knot detected respectively to flue gas with the continuous on-line monitoring system of HC remover flue gas
Fruit；
Conclusion:
Since a large amount of HC class interfering substance is contained at biomass scene in Fig. 4, so ultra-violet absorption spectrum is inhaled by HC completely
It receives spectrum to cover, can't see the absorption spectrum of characteristic absorption substance NO.Fig. 5 is that the effect of HC remover is added under same operating
Fruit is schemed, as it can be seen that HC remover eliminates the HC substance of the overwhelming majority in figure, can obviously be seen in the ultra-violet absorption spectrum in figure
To the absorption spectrum (region between two red lines) of NO.
As it can be seen that the continuous on-line monitoring system of flue gas with HC remover of the invention is for containing a large amount of carbon in flue gas
The detection of the flue gas of hydrogen compound has extraordinary effect.So as to meet the special work such as biomass power generation, waste incineration
The use at condition scene.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiment or examples.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of continuous on-line monitoring system of flue gas characterized by comprising
Flue sampler；
Heat tracing pipe, the heat tracing pipe are connected with the flue sampler；
Flue gas pretreatment system, the flue gas pretreatment system are connected with the heat tracing pipe, and are suitable for carrying out concentration point to flue gas
Pretreatment before analysis；
The upstream or downstream of the flue gas pretreatment system, the HC remover is arranged in HC remover, the HC remover
Including ventilation pipe and heating element, the heating element is suitable for taking the photograph the flue gas passed through in the ventilation pipe to 200
Family name degree or more；
Flue gas concentration analyzer, the flue gas concentration analyzer and the flue gas pretreatment system or the HC remover phase
Even.
2. the continuous on-line monitoring system of flue gas according to claim 1, which is characterized in that the flue gas pretreatment system packet
It includes:
Condenser, the condenser are connected with the HC remover or the heat tracing pipe；
Sampling pump, the sampling pump are connected with the condenser；
Acid mist filter, the acid mist filter are connected with the sampling pump；
Nitrogen oxides converter, the nitrogen oxides converter are connected with the acid mist filter.
3. the continuous on-line monitoring system of flue gas according to claim 1, which is characterized in that the ventilation pipe is by metal tube
Or quartz ampoule is formed.
4. the continuous on-line monitoring system of flue gas according to claim 3, which is characterized in that the ventilation pipe is by centre
High temperature section and the room temperature section at both ends composition, the heating element are suitable for heating the high temperature section.
5. the continuous on-line monitoring system of flue gas according to claim 4, which is characterized in that the outer diameter of the ventilation pipe is
0.5-30mm, the length 0.1-25m of the high temperature section.
6. the continuous on-line monitoring system of flue gas according to claim 3, which is characterized in that the length of the room temperature section at both ends
Degree is 20cm.
7. the continuous on-line monitoring system of flue gas according to claim 6, which is characterized in that the heating element is suitable for institute
It states high temperature section and is heated to 200-1500 degrees Celsius.
8. the continuous on-line monitoring system of flue gas according to claim 1-7, which is characterized in that the high temperature section disk
Revolve into cylindrical shape or serpentine-like squarely of spiraling.
9. the continuous on-line monitoring system of flue gas according to claim 8, which is characterized in that the heating element is by being set in
The heat medium composition that ventilation pipe and interlayer on the outside of the high temperature section tube wall are passed through.
10. the continuous on-line monitoring system of flue gas according to claim 8, which is characterized in that the high temperature section spirals into circle
Tubular, the heating element are heating rod, and the heating rod is arranged in the high temperature section and spirals in the cylinder to be formed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145556A (en) * | 2019-12-24 | 2020-05-12 | 湖南轩源环保科技有限公司 | Black smoke vehicle license plate recognition method, system, equipment and readable storage medium |
| CN112213405A (en) * | 2019-07-12 | 2021-01-12 | 上海博馨环境技术工程有限公司 | Compound VOCs on-line monitoring system |
| CN115382369A (en) * | 2022-08-24 | 2022-11-25 | 安徽天品环保科技有限公司 | Hydrocarbon device is removed to continuous monitoring system high temperature branch of fume emission |
| CN112945887B (en) * | 2021-03-11 | 2023-12-19 | 西安交通大学 | Flue gas in-situ monitoring system and method |
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2018
- 2018-12-14 CN CN201811534954.5A patent/CN109406435A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112213405A (en) * | 2019-07-12 | 2021-01-12 | 上海博馨环境技术工程有限公司 | Compound VOCs on-line monitoring system |
| CN111145556A (en) * | 2019-12-24 | 2020-05-12 | 湖南轩源环保科技有限公司 | Black smoke vehicle license plate recognition method, system, equipment and readable storage medium |
| CN112945887B (en) * | 2021-03-11 | 2023-12-19 | 西安交通大学 | Flue gas in-situ monitoring system and method |
| CN115382369A (en) * | 2022-08-24 | 2022-11-25 | 安徽天品环保科技有限公司 | Hydrocarbon device is removed to continuous monitoring system high temperature branch of fume emission |
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