CN106323826A - Monitoring device and monitoring method for ultralow emission smoke - Google Patents
Monitoring device and monitoring method for ultralow emission smoke Download PDFInfo
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- CN106323826A CN106323826A CN201611004246.1A CN201611004246A CN106323826A CN 106323826 A CN106323826 A CN 106323826A CN 201611004246 A CN201611004246 A CN 201611004246A CN 106323826 A CN106323826 A CN 106323826A
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- 239000000779 smoke Substances 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012806 monitoring device Methods 0.000 title abstract 4
- 239000002245 particle Substances 0.000 claims abstract description 33
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 25
- 239000003500 flue dust Substances 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000004071 soot Substances 0.000 claims description 8
- 241000931526 Acer campestre Species 0.000 claims description 6
- 230000001186 cumulative effect Effects 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000000149 argon plasma sintering Methods 0.000 description 5
- 238000000790 scattering method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000005250 beta ray Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0211—Investigating a scatter or diffraction pattern
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a monitoring device and a monitoring method for ultralow emission smoke. The monitoring device is used for monitoring particle size distribution and concentration of smoke in a smoke measuring area. The monitoring device comprises a multi-wavelength laser light source part and a multi-angle photoelectric detection part, wherein the multi-wavelength laser light source part comprises a plurality of laser devices, a coupler and a collimator; the laser devices are used for emitting the laser light in different wavelengths; the coupler is used for coupling the laser light in different wavelengths; the collimator is used for collimating the laser light after being coupled and acquiring the multi-wavelength laser light used for irradiating the smoke measuring area; the multi-angle photoelectric detection part comprises a plurality of photoelectric detectors, a signal modulator and a signal processor; the photoelectric detectors are respectively arranged at certain angles with the collimator and are used for distinguishing the strength of laser light with different wavelengths, receiving the multi-wavelength laser light after smoke particle scattering and converting into an electric signal; the signal modulator is used for receiving the electric signal and modulating; the signal processor is used for processing the electric signal after being modulated, so as to acquire the particle size and concentration of the smoke.
Description
Technical field
The invention belongs to smoke granularity and concentration determination field, be specifically related to a kind of scattered based on multi-wavelength multi-angle laser angular
Penetrate the minimum discharge monitoring smoke dust method and apparatus of principle.
Background technology
The granule density of flue dust is one of important parameter characterizing smoke contamination thing emission behaviour.Weight method is international at present
The universal test method of upper particulate pollutant, due to on-line measurement demand, defines again continuous weighting method, β ray method etc. real-time
Sampling dust concentration analytic process and the online concentration analysis method such as charge method, light scattering method.
But it is as the big of requirement raising and the progress of dedusting technology of environmental conservation, minimum discharge dust concentration and granularity
Width reduces, and measures according to sampling method, and single is longer for sample time；Measuring according at line method, test is by mistake
Difference is bigger.
In order to solve minimum discharge monitoring smoke dust problem, generally using angular scattering method, the method is angled at measurement zone
Installing a laser instrument and a photodetector, laser instrument sends laser and irradiates measurement zone, and photodetector acceptance angle scatters
Signal.Owing to the most generally ignoring the impact of particle diameter diagonal angle scattered light intensity, simplify and think angle scattered light signal intensity and cigarette
Dust concentration is directly proportional, therefore, after obtaining proportionality coefficient by experimental calibration method, then by laser initial beam intensity and angle scattered light
The ratio of signal i.e. can determine that the concentration of flue dust.If also can be calculated the mean diameter of flue dust in conjunction with Mie-scattering lidar.
But for minimum discharge flue dust, the impact of particle diameter diagonal angle scattered light intensity cannot be left in the basket, therefore, traditional at present
It is relatively big that minimum discharge flue dust error measured by angular scattering method and industrial instrument, and cannot obtain particle diameter distribution (granularity) letter
Breath.
Summary of the invention
It is an object of the invention to provide a kind of minimum discharge flue dust based on multi-wavelength multi-angle laser angular scattering principle prison
Survey method and apparatus, by multi-wavelength multi-angle laser angular scattering method, reduce existing angle scattering monitoring smoke dust device and side
The measurement lower limit of method, raising certainty of measurement, and there is the advantages such as online, contactless, easy care.
To achieve these goals, present invention employs following technical scheme:
The invention provides a kind of minimum discharge monitoring smoke dust device, to the particle diameter distribution of flue dust in emission measurement district with dense
Degree is monitored, and has such technical characteristic, including multiple wavelength laser light source portion and multi-angle photodetection portion.Wherein,
Multiple wavelength laser light source portion has: multiple laser instrument, is used for launching the laser of different wave length simultaneously；Bonder, to different wave length
Laser couple；And collimator, the laser after coupling is collimated, obtains for being irradiated to emission measurement district many
Wavelength laser.Multi-angle photodetection portion has: multiple photodetectors, arranges at an angle with collimator respectively and can
Differentiate different wave length laser intensity, be used for reception multiwavelength laser after soot dust granule scatters and convert thereof into the signal of telecommunication；
Signal modulator, receives the signal of telecommunication and is modulated；And signal processor, the signal of telecommunication after modulation is processed, obtains
The particle diameter of flue dust and concentration.
The minimum discharge monitoring smoke dust device that the present invention provides, also has such technical characteristic: one of them light electrical resistivity survey
Survey device and collimator is on same straight line, be positioned at the right opposite of collimator.
The minimum discharge monitoring smoke dust device that the present invention provides, also has such technical characteristic:
Connected by optical fiber between laser instrument, bonder and collimator, photodetector, signal modulator and signal
Connected by cable between processor.
Further, present invention also offers a kind of minimum discharge monitoring smoke dust method, there is such technical characteristic, including
Following steps: step 1, according to measuring object and requirement, determine the operation wavelength of each laser instrument and each photodetector
Setting angle；Step 2, opens multiple wavelength laser light source portion so that multiwavelength laser irradiates measurement zone, and triggers all smooth electrical resistivity surveys
Survey device works, and receives the described multiwavelength laser after soot dust granule scatters, and differentiates the respective intensities of different wave length angle scattered light
And convert thereof into the signal of telecommunication；Step 3, uses signal modulator receive the described signal of telecommunication and be modulated；Step 4, uses letter
The described signal of telecommunication after modulation is processed by number processor, obtains particle diameter distribution and the concentration of flue dust.
The minimum discharge monitoring smoke dust method based on multi-wavelength multi-angle laser angular scattering principle of the present invention, step 4 place
Reason principle is Mie-scattering lidar, and owing to measurement zone is set as small space, signal processor can arrive light according to Mie-scattering lidar and enter
The scattered light intensity of the individual particle in the case of penetrating is:
Wherein, λ is optical maser wavelength；R is that granule is to sensing point distance；I (θ) is scattered light amplitude function, is flue dust particle diameter D
Function with scatteringangleθ；I0For incident intensity.Scatteringangleθ is formed by scattered light and incident illumination that photodetector receives
Angle.
Therefore, specific wavelength, special angle laser angular scattered light scattering strength are:
Wherein, subscript i is that specific optical maser wavelength combines with special angle.By multi-wavelength multi-angle laser angular scattering principle
Multi-wavelength, multi-angle combination, equation group can be set up, solve obtain correspondence discharge soot dust granule particle diameter, and carry out counting system
Meter, obtains the distributed number of particle diameter.
Thus can get particle object volume concentrations:
Wherein, VDiFor n particle diameter DiThe cumulative volume of granule, V is for measuring cumulative volume, and V=S × v, S are facula area, and v is
Flue gas flow rate.
Invention effect and effect
The minimum discharge monitoring smoke dust device provided according to the present invention and monitoring method, owing to multiple wavelength laser light source portion has
There is multiple laser instrument that can simultaneously launch different wave length laser, and to have in multi-angle photodetection portion with collimator be one
Determine angle to arrange and multiple photodetectors of distinguishable different wave length laser intensity so that the present invention can pass through multi-wavelength
Multi-angle laser angular scattering method, concurrently sets multiple different swashing for the particle size distribution feature in minimum discharge flue dust
Optical wavelength, and then obtain multiple angles scattered signal, by the detection analysis to these angle scattered signals, it becomes possible to obtain cigarette simultaneously
In dirt measurement zone, concentration and the particle diameter of flue dust are distributed.Not only reduce under the measurement of existing angle scattering monitoring smoke dust apparatus and method
Limit, raising certainty of measurement, but also there is the advantages such as online, contactless, easy care.
Accompanying drawing explanation
Fig. 1 is the structural representation of the minimum discharge monitoring smoke dust device of the embodiment of the present invention；
Fig. 2 is the flow chart of the minimum discharge monitoring smoke dust method of the embodiment of the present invention.
Detailed description of the invention
Detailed description of the invention below in conjunction with the concrete present invention of accompanying drawing.
Fig. 1 is the structural representation of the minimum discharge monitoring smoke dust device of the embodiment of the present invention.
Minimum discharge monitoring smoke dust device 100 is arranged near discharge emission measurement district 30, including multiple wavelength laser light source
Portion 10 and multi-angle photodetection portion 20.Multiple wavelength laser light source portion 10 is used for providing measurement light source and illuminating measurement zone, many
Angle photodetection portion 20 is used for multi-angle exploring laser light scattered light signal.
Multiple wavelength laser light source portion 10 includes multiple laser instrument, multi-wavelength fiber coupler 102, collimator 101, San Zhetong
Cross optical fiber to connect.
Laser instrument 1 (103), laser instrument 2 (104) ... the laser that multiple laser instrument such as laser instrument n (105) send is through many
After optical fiber 107 transmits at most long wavelength fiber bonder 102 coupling, then send after optical fiber 106 transmits and collimates to collimator (101)
Multiwavelength laser 301, and irradiate discharge emission measurement district 30.
Multi-angle photodetection portion 20 includes by photodetector, signal modulating unit and signal that cable connects
Reason unit.
Each photodetector the most distinguishable different wave length laser intensity, these photodetectors are one with collimator respectively
Determine angle to arrange, and one of them and collimator 101 are on same straight line, are positioned at collimator 101 right opposite, are used for supervising
Surveying transmission light 302 optical signal of incident laser, due to discharge flue dust super low concentration, the light intensity that can be approximately considered this transmission light is
Laser original incident light intensity.
After soot dust granule generation light scattering in multiwavelength laser 301 irradiates discharge emission measurement district 30, different angles
Light scattering signal by corresponding photodetector 1 (201), photodetector 2 (202), photodetector 3 (203) ... light
Electric explorer n (204) is received and converted to the signal of telecommunication.In the present embodiment, photodetector 1 (201) is positioned at collimator 101
Right opposite, is used for monitoring original incident light intensity, photodetector 2,3 ... n with become corresponding different angles respectively with incident illumination,
It is used for detecting the optical signal of the laser angular scattered light 303 of multi-angle.
Signal modulating unit 205 is used for modulating the signal of telecommunication that photodetection produces, and transmits it to signal processing unit
206 process, and obtain smoke granularity and concentration information.
Fig. 2 is the flow chart of the minimum discharge monitoring smoke dust method in the present embodiment.
As in figure 2 it is shown, minimum discharge monitoring smoke dust method comprises the following steps:
Step 1, according to measuring object and requirement, determines operation wavelength and the peace of each photodetector of each laser instrument
Dress angle；
Step 2, opens multiple wavelength laser light source portion so that multiwavelength laser irradiates measurement zone, and triggers all smooth electrical resistivity surveys
Survey device works, and receives the described multiwavelength laser after soot dust granule scatters, and differentiates the respective intensities of different wave length angle scattered light
And convert thereof into the signal of telecommunication；
Step 3, uses signal modulator receive the signal of telecommunication and be modulated；
Step 4, use signal processor to modulation after the described signal of telecommunication process, obtain flue dust particle diameter distribution and
Concentration.
The minimum discharge monitoring smoke dust method based on multi-wavelength multi-angle laser angular scattering principle of the present invention the most former
Reason is Mie-scattering lidar, and owing to measurement zone is set as small space, signal processor can arrive light incidence feelings according to Mie-scattering lidar
The scattered light intensity of the individual particle under condition is:
Wherein, λ is optical maser wavelength；R is that granule is to sensing point distance；I (θ) is scattered light amplitude function, is flue dust particle diameter D
Function with scatteringangleθ；I0For incident intensity.Scatteringangleθ is formed by scattered light and incident illumination that photodetector receives
Angle.
Therefore, specific wavelength, special angle laser angular scattered light scattering strength are:
Wherein, subscript i is that specific optical maser wavelength combines with special angle.By multi-wavelength multi-angle laser angular scattering principle
Multi-wavelength, multi-angle combination, equation group can be set up, solve obtain correspondence discharge soot dust granule particle diameter, and carry out counting system
Meter, obtains the distributed number of particle diameter.
Thus can get particle object volume concentrations:
Wherein, VDiFor n particle diameter DiThe cumulative volume of granule, V is for measuring cumulative volume, and V=S × v, S are facula area, and v is
Flue gas flow rate.
Embodiment effect and effect
The minimum discharge monitoring smoke dust device provided according to the present embodiment and monitoring method, due to multiple wavelength laser light source portion
There is multiple laser instrument that can simultaneously launch different wave length laser, and multi-angle photodetection portion has with collimator in
Certain angle is arranged and multiple photodetectors of distinguishable different wave length laser intensity so that the present invention can pass through many ripples
Long multi-angle laser angular scattering method, concurrently sets multiple different for the particle size distribution feature in minimum discharge flue dust
Optical maser wavelength, and then obtain multiple angles scattered signal, by the detection analysis to these angle scattered signals, it becomes possible to obtain simultaneously
In emission measurement district, concentration and the particle diameter of flue dust are distributed.Not only reduce the measurement of existing angle scattering monitoring smoke dust apparatus and method
Lower limit, raising certainty of measurement, but also there is the advantages such as online, contactless, easy care.
The invention is not restricted to the scope of detailed description of the invention, from the point of view of those skilled in the art, as long as respectively
Kind of change limits and in the spirit and scope of the present invention that determine, these changes are apparent from described claim,
All utilize the innovation and creation of present inventive concept all at the row of protection.
Claims (6)
1. a minimum discharge monitoring smoke dust device, is monitored particle diameter distribution and the concentration of flue dust in emission measurement district, its
It is characterised by, including:
Multiple wavelength laser light source portion and multi-angle photodetection portion,
Wherein, described multiple wavelength laser light source portion has:
Multiple laser instrument, are used for launching the laser of different wave length simultaneously；
Bonder, couples the described laser of described different wave length；And
Collimator, collimates the described laser after coupling, obtains the multi-wavelength for being irradiated to described emission measurement district and swashs
Light,
Described multi-angle photodetection portion has:
Multiple photodetectors, are arranged with described collimator and distinguishable different wave length laser intensity respectively at an angle,
For receive through soot dust granule scatter after described multiwavelength laser and convert thereof into the signal of telecommunication；
Signal modulator, receives the described signal of telecommunication and is modulated；And
Signal processor, processes the described signal of telecommunication after modulation, obtains particle diameter and the concentration of described flue dust.
Minimum discharge monitoring smoke dust device the most according to claim 1, it is characterised in that:
Wherein, one of them described photodetector and described collimator are on same straight line.
Minimum discharge monitoring smoke dust device the most according to claim 1, it is characterised in that:
Wherein, connected by optical fiber between described laser instrument, described bonder and described collimator,
Connected by cable between described photodetector, described signal modulator and described signal processor.
4. a minimum discharge monitoring smoke dust method, it is characterised in that comprise the following steps:
Step 1, according to measuring object and requirement, determines operation wavelength and the established angle of each photodetector of each laser instrument
Degree；
Step 2, opens multiple wavelength laser light source portion so that multiwavelength laser irradiates measurement zone, and triggers all photodetectors
Work, receives the described multiwavelength laser after soot dust granule scatters, differentiate different wave length angle scattered light respective intensities and by
It is converted into the signal of telecommunication；
Step 3, uses described signal modulator receive the described signal of telecommunication and be modulated；
Step 4, uses signal processor to process the described signal of telecommunication after modulation, obtains particle diameter and the concentration of flue dust.
Minimum discharge monitoring smoke dust device the most according to claim 4, it is characterised in that:
Wherein, in step 4, described signal processor is according to the particle diameter of following formula calculating flue dust:
Wherein, subscript i is that specific optical maser wavelength combines with special angle, IsiFor the scattered light intensity under light condition of incidence；λiIt is sharp
Optical wavelength；R is that granule is to sensing point distance；I (θ) is scattered light amplitude function, is flue dust particle diameter D and scatteringangleθiFunction；
I0iFor incident intensity.
Minimum discharge monitoring smoke dust device the most according to claim 5, it is characterised in that:
Wherein, in step 4, described signal processor obtains particle object volume concentrations according to following formula:
Wherein, VDiFor n particle diameter DiThe cumulative volume of granule, V is for measuring cumulative volume, and V=S × v, S are facula area, and v is flue gas
Flow velocity.
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| CN201611004246.1A CN106323826B (en) | 2016-11-15 | 2016-11-15 | Ultralow emission smoke monitoring device and monitoring method |
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| CN201611004246.1A CN106323826B (en) | 2016-11-15 | 2016-11-15 | Ultralow emission smoke monitoring device and monitoring method |
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| CN107655797A (en) * | 2017-11-28 | 2018-02-02 | 茂名市和泰沉香种植有限公司 | Air-borne dust detection device between agalloch eaglewood truck |
| CN108088775A (en) * | 2017-12-07 | 2018-05-29 | 广东力源科技股份有限公司 | A kind of detection method of air-borne dust granular size and concentration |
| CN108145606A (en) * | 2017-11-23 | 2018-06-12 | 浙江工业大学 | Polishing fluid bulky grain real time on-line monitoring device in a kind of polishing process |
| CN108318389A (en) * | 2017-12-29 | 2018-07-24 | 汉威科技集团股份有限公司 | A kind of novel particle concentration detection method |
| CN108732134A (en) * | 2018-07-18 | 2018-11-02 | 上海原科实业发展有限公司 | A kind of scattering of multi-wavelength and transmittance opacimetry device |
| CN109507074A (en) * | 2019-01-21 | 2019-03-22 | 上海理工大学 | A kind of minimum discharge dust concentration monitoring device and monitoring method |
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| CN113405961A (en) * | 2021-06-21 | 2021-09-17 | 中煤科工集团重庆研究院有限公司 | Dust concentration detection method based on multi-angle light scattering |
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| CN108088775A (en) * | 2017-12-07 | 2018-05-29 | 广东力源科技股份有限公司 | A kind of detection method of air-borne dust granular size and concentration |
| CN108318389A (en) * | 2017-12-29 | 2018-07-24 | 汉威科技集团股份有限公司 | A kind of novel particle concentration detection method |
| CN108732134A (en) * | 2018-07-18 | 2018-11-02 | 上海原科实业发展有限公司 | A kind of scattering of multi-wavelength and transmittance opacimetry device |
| CN109507074A (en) * | 2019-01-21 | 2019-03-22 | 上海理工大学 | A kind of minimum discharge dust concentration monitoring device and monitoring method |
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN111307676A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Device and method for monitoring concentration of laser front scattering particulate matter |
| CN112630114A (en) * | 2020-12-31 | 2021-04-09 | 金民 | Dust concentration detection equipment for environmental air detection and detection method thereof |
| CN113405961A (en) * | 2021-06-21 | 2021-09-17 | 中煤科工集团重庆研究院有限公司 | Dust concentration detection method based on multi-angle light scattering |
| CN113984605A (en) * | 2021-10-12 | 2022-01-28 | 北京雷米特文化科技有限公司 | Flue gas ultralow emission dust detection system |
| CN113984605B (en) * | 2021-10-12 | 2023-12-26 | 北京雷米特文化科技有限公司 | Flue gas ultra-low emission tiny dust detecting system |
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