CN106442248A - Measurement method of emission concentrations of particulate matters in gases and system of measurement - Google Patents
Measurement method of emission concentrations of particulate matters in gases and system of measurement Download PDFInfo
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- 238000005259 measurement Methods 0.000 title claims abstract description 67
- 239000007789 gas Substances 0.000 title abstract description 46
- 238000000691 measurement method Methods 0.000 title abstract 5
- 239000013618 particulate matter Substances 0.000 claims abstract description 167
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 255
- 238000009826 distribution Methods 0.000 claims description 94
- 239000008188 pellet Substances 0.000 claims description 52
- 239000008187 granular material Substances 0.000 claims description 37
- 238000012360 testing method Methods 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 30
- 239000000725 suspension Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 18
- 239000000428 dust Substances 0.000 description 6
- 238000005367 electrostatic precipitation Methods 0.000 description 5
- 230000000153 supplemental effect Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000010410 dusting Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000000892 gravimetry Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
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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
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Abstract
The invention relates to the field of environment monitoring and particularly relates to a measurement method of emission concentrations of particulate matters in gases and a system thereof. The measurement method comprises the following steps: step S1, collecting a plurality of groups of standard samples in different gas emission environments, selecting a reference particulate matter and at least one particulate matter to be measured, and establishing a corresponding relation between the concentration of the reference particulate matter in a standard sample and the concentration of the particulate matters to be measured in a corresponding emission environment; and step S2, measuring the concentration of the reference particulate matter in a sample to be measured in a corresponding gas emission environment and obtaining the concentration of the particulate matters to be measured according to the corresponding relation. The invention also provides a system for measuring emission concentrations of particulate matters in gases; the measurement system is based on the principle of the measurement method. The measurement method of the emission concentrations of the particulate matters in gases and the system thereof have the advantages of high accuracy and simple measurement processes.
Description
【Technical field】
The present invention relates to environmental monitoring, particularly to granular material discharged concentration measuring method in a kind of gas and be
System.
【Background technology】
Generally for the emission point of gas, need as requested the particle concentration that it discharges is measured.Adopt at present
Weight method is as the standard method of measurement of discharged particle concentration, but the canonical measure that the method is discharged as particle concentration
Method, operates comparatively laborious, and cannot be carried out continuously measuring in real time, provides measurement data in time.
In order to measure the concentration of emission of the particulate matter of the gases such as coal-burning power plant in real time, generally using the method for optical scattering
Carry out on-line measurement.In the fume emission of general coal-burning power plant, water content is especially high, will produce much little water in flue
Drip, the presence of these little water droplets can make incident illumination produce scattering, and carried out using the method for optical scattering cannot during on-line measurement
Resolved scatter source is drop or solid particulate matter.Therefore, particle concentration in flue gas is measured using the method for optical scattering
Mode cannot avoid droplets from affecting, thus affecting measurement result.
【Content of the invention】
For overcoming the inaccurate technical barrier of particle concentration in existing measurement gas, the invention provides one kind can be real
When measurement gas in granular material discharged concentration measuring method and system in particle concentration, and a kind of high gas of accuracy.
The present invention is to provide granular material discharged concentration in a kind of gas for solving the scheme that above-mentioned technical problem provides
Measuring method, including step S1, gathers multigroup standard sample that gas with various discharges under environment, and select a benchmark particulate matter and
At least one candidate particles thing, sets up benchmark particulate matter and described candidate particles described in described standard sample under corresponding discharge environment
Corresponding relation between the concentration of thing；Step S2, benchmark granule described in the testing sample under measurement corresponding gas discharge environment
The concentration of thing, the concentration of benchmark particulate matter described in measurement testing sample, and obtain described to be measured according to described corresponding relation
The concentration of grain thing.
Preferably, it is specially in described step S1：Step T101, obtains benchmark granule described in multigroup described standard sample
One of thing and the corresponding particle diameter distribution relation of described candidate particles thing, light scatter intensity distribution relation, volume distributed median relation；
Step T102, measurement obtains the concentration of benchmark particulate matter described in described standard sample, and according to described particle diameter distribution relation, light
One of scatter intensity distribution relation, volume distributed median relation, set up benchmark particulate matter described in described standard sample with described
Corresponding relation between the concentration of candidate particles thing.
Preferably, described distribution relation is particle diameter distribution relation, and above-mentioned steps T101 further include：Many based on obtain
Organize benchmark particulate matter described in described standard sample and the corresponding particle diameter distribution relation of described candidate particles thing is set up one and included institute
State between benchmark particulate matter and described candidate particles thing one of number percent, percent by volume, mass percent or
Several data bases.
Preferably, described distribution relation is particle diameter distribution relation, and above-mentioned steps T102 are specially：Described particle diameter distribution relation
Represented with the mass percent of benchmark particulate matter described in described standard sample and described candidate particles thing, in described standard sample
In, the corresponding relation between the concentration of described benchmark particulate matter and described candidate particles thing is expressed as：Its
In, P1 is the mass percent of benchmark particulate matter described in described standard sample, P2 is to be measured described in described standard sample
The mass percent of grain thing, M1 is the concentration value of described benchmark particulate matter, and M2 is the concentration value of described candidate particles thing.
Preferably, described benchmark particulate matter is one of PM2.5, PM10, overall suspended pellet, described candidate particles thing
For one of PM2.5, PM10, overall suspended pellet or several, described candidate particles thing with described benchmark particulate matter is not
Same.
The present invention also provides granular material discharged concentration measurement system in a kind of gas for solving above-mentioned technical problem, its bag
Include：
First processing units, for gathering the multigroup standard sample under gas with various discharge environment, and select a benchmark
Grain thing and at least one candidate particles thing, are set up benchmark particulate matter described in described standard sample under corresponding discharge environment and are treated with described
Survey the corresponding relation between the concentration of particulate matter；
Second processing unit, for measuring the dense of benchmark particulate matter described in the testing sample under corresponding gas discharge environment
Degree, and the concentration of described candidate particles thing is obtained according to described corresponding relation.
Preferably, described first processing units include：Data acquisition module, for obtaining institute in multigroup described standard sample
State benchmark particulate matter and the corresponding particle diameter distribution relation of described candidate particles thing, light scatter intensity distribution relation, volume distributed median are closed
One of system；Data processing module, obtains the concentration of benchmark particulate matter described in described standard sample for measurement, and foundation
One of described particle diameter distribution relation, light scatter intensity distribution relation, volume distributed median relation, set up institute in described standard sample
State the corresponding relation between benchmark particulate matter and the concentration of described candidate particles thing.
Preferably, described distribution relation is particle diameter distribution relation, and described data acquisition module further includes data base, institute
State data base and include benchmark particulate matter described in described standard sample and the corresponding particle diameter distribution relation of described candidate particles thing.
Preferably, described second processing unit further includes：Measurement module, for measuring benchmark in described testing sample
The concentration of particulate matter；And
Computing module, based on benchmark particle concentration in the described testing sample that described measurement module obtains and described right
The concentration obtaining described candidate particles thing should be related to.
Preferably, described second processing unit further includes data display memory module, for showing and storing by institute
State the concentration that computing module obtains described candidate particles thing.
Compared with prior art, in granular material discharged concentration measuring method in a kind of gas that the present invention provides, by building
Vertical corresponding gas discharges the corresponding relation between the concentration of benchmark particulate matter and candidate particles thing in environment Plays sample；Measurement
The concentration of benchmark particulate matter in testing sample, and obtain the concentration of candidate particles thing according to corresponding relation, due to based on more accurate
Benchmark particulate matter concentration carry out calculate obtain candidate particles thing concentration, compare traditional measuring method more fast in real time
Victory, and improve the accuracy of measurement result.
Based on the particle diameter distribution relation of benchmark particulate matter in described standard sample and described candidate particles thing, benchmark can be obtained
Proportionate relationship between particulate matter and candidate particles thing, and benchmark particulate matter and candidate particles thing are set up according to described proportionate relationship
Between concentration corresponding relation.Due to particle diameter distribution relation can be overall count benchmark particulate matter and candidate particles in standard sample
The concentration ratio relation of thing, therefore the concentration by benchmark particulate matter in wherein one accurate testing sample can with reference to corresponding relation
Obtain accurate candidate particles thing concentration.
Compared with prior art, in a kind of gas that the present invention provides in granular material discharged concentration measurement system, by the
One processing unit selectes a benchmark particulate matter and at least one candidate particles thing in multigroup standard sample, sets up described standard sample
Corresponding relation between middle benchmark particulate matter and the concentration of candidate particles thing, then measured in testing sample by second processing unit
The concentration of benchmark particulate matter, and obtain the concentration of described candidate particles thing according to described corresponding relation, by selected reference granule
Thing, if the concentration of benchmark particulate matter can accurate be recorded, by this benchmark particulate matter concentration obtain candidate particles thing dense
Degree is more accurate, and therefore, this system can obtain the concentration of accurate candidate particles thing.
Further benchmark particulate matter and candidate particles thing in multigroup standard sample are obtained by data acquisition module corresponding
Particle diameter distribution relation, by data processing module according to particle diameter distribution relation obtain benchmark particulate matter and candidate particles thing concentration it
Between corresponding relation, the particle diameter distribution relation of acquisition can accurate get standard samples middle benchmark particulate matter and candidate particles thing
Between proportionate relationship, the concentration of the candidate particles thing therefore finally giving is also accordingly more accurate.
【Brief description】
Fig. 1 is granular material discharged concentration measuring method overall flow figure in a kind of gas of the present invention.
Fig. 2 is the schematic flow sheet of step S1 in granular material discharged concentration measuring method in a kind of gas of the present invention.
Fig. 3 be in a kind of gas of the present invention granular material discharged concentration measurement system structural representation.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only in order to explain the present invention,
It is not intended to limit the present invention.
Refer to Fig. 1, the first embodiment of the present invention provides granular material discharged concentration measuring method in a kind of gas, bag
Include step S1, collection gas with various discharges the multigroup standard sample under environment, and select a benchmark particulate matter and at least to be measured
Particulate matter, set up benchmark particulate matter described in described standard sample and described candidate particles thing under corresponding discharge environment concentration it
Between corresponding relation；Step S2, the concentration of benchmark particulate matter described in the testing sample under measurement corresponding gas discharge environment, and
Obtain the concentration of described candidate particles thing according to described corresponding relation.
When the gas for plant emissions measures it is preferable that in S1 step, described multigroup standard sample be
Obtain under different discharge environment, described different discharge environment refer to the different discharge environment of different operating modes and dedusting technology, and
Select a benchmark particulate matter in the overall suspended pellet in multigroup standard sample, this benchmark particulate matter can be more accurate by equipment
Record its concentration, and set up the corresponding relation between this benchmark particle concentration and candidate particles thing concentration it is intended to pass through base
The concentration correspondence of quasi- particulate matter obtains the concentration of candidate particles thing.
In order to improve the measurement accuracy of granular material discharged concentration measuring method in described gas further, in described gas
Granular material discharged concentration measuring method further includes：Carry out multiple repairing weld to the same gas discharging environment repeatedly to measure, with
Reduce measurement error.By the gas samplings measurement to different discharge environment, can obtain under varying environment benchmark particulate matter with
Corresponding relation between the concentration of candidate particles thing.
Described corresponding relation can be dissipated by measuring benchmark particulate matter and the corresponding particle diameter of candidate particles thing, light in gas
Penetrate the distribution of intensity, volume etc., wherein, described particle diameter distribution can show the particle diameter distribution of particulate matter in standard sample, can pass through
Particle diameter distribution counts the proportionate relationship between benchmark particulate matter, candidate particles thing and overall suspended pellet, such as benchmark
Quantitative proportion relation between grain thing, candidate particles thing and overall suspended pellet, mass ratio relation, dimension scale relation etc.,
According under the gas of certain volume, the quantity of benchmark particulate matter, candidate particles thing and overall suspended pellet, quality, size etc. with
Concentration there is also proportionate relationship, therefore can obtain the concentration corresponding relation between benchmark particulate matter and candidate particles thing；
Described light scatter intensity distribution can show the light scatter intensity distribution of particulate matter in standard sample, can pass through light scattering
Intensity distributions count benchmark particulate matter, candidate particles thing and overall suspended pellet corresponding light scatter intensity proportionate relationship,
According under the gas of certain volume, the light scatter intensity of benchmark particulate matter, candidate particles thing and overall suspended pellet and concentration
There is proportionate relationship, the concentration corresponding relation between benchmark particulate matter and candidate particles thing can be obtained according to described proportionate relationship.
Described volume distributed median can show the volume distributed median of particulate matter in standard sample, can count benchmark by volume distributed median
Particulate matter, candidate particles thing and overall suspended pellet corresponding volume ratio relation, according under the gas of certain volume, benchmark
The volume of particulate matter, candidate particles thing and overall suspended pellet and concentration there is also proportionate relationship, according to described proportionate relationship energy
Obtain the concentration corresponding relation between benchmark particulate matter and candidate particles thing.
Due to can accurate be obtained by measuring basiss particulate matter and the corresponding particle diameter distribution of candidate particles thing, therefore for
Obtain concentration corresponding relation between the of a relatively high benchmark particulate matter of accuracy and candidate particles thing it is preferable that please in the lump
Refering to Fig. 2, in above-mentioned steps S1, concrete steps include：Step T101, obtains benchmark described in multigroup described standard sample
In grain thing and the corresponding particle diameter distribution relation of described candidate particles thing, light scatter intensity distribution relation, volume distributed median relation one
Kind；Step T102, measurement obtains the concentration of benchmark particulate matter described in described standard sample, and closes according to described particle diameter distribution
System, one of light scatter intensity distribution relation, volume distributed median relation, set up benchmark particulate matter described in described standard sample with
Corresponding relation between the concentration of described candidate particles thing.
In described step T101, the particle diameter distribution relation of benchmark particulate matter and described candidate particles thing can pass through grain diameter measurement
The grain size distribution of instrument measurement standard sample obtains, and can intuitively find out corresponding standard sample under different-grain diameter by grain size distribution
Quantity, volume, quality equal distribution situation, the middle benchmark particulate matter and to be measured of getting standard samples can be counted by grain size distribution
The proportionate relationship of the quantity of particulate matter, volume, quality etc..
Preferably, described distribution relation is particle diameter distribution relation, and described step T101 further includes：Many based on obtain
Organize benchmark particulate matter described in described standard sample and the corresponding particle diameter distribution relation of described candidate particles thing is set up one and included institute
State between benchmark particulate matter and described candidate particles thing one of number percent, percent by volume, mass percent or
Several data bases.When described data base includes being based under various circumstances benchmark particle concentration calculating candidate particles thing concentration
Required supplemental characteristic, number percent between particulate matter and candidate particles thing on the basis of described supplemental characteristic, percent by volume,
One of mass percent or several combinations.
The concentration of benchmark particulate matter described in described standard sample and described candidate particles thing is set up in described step T102
Between corresponding relation be specially：
By transfer pre-stored data obtain standard sample described between benchmark particulate matter and described candidate particles thing concentration
Corresponding relation, described pre-stored data is benchmark particulate matter parameter corresponding with candidate particles thing in the standard sample being obtained ahead of time
Data；
Or the correspondence between benchmark particulate matter and described candidate particles thing concentration described in standard sample is obtained by measurement
Relation, that is, when measuring testing sample, by the parameter number of benchmark particulate matter and candidate particles thing described in measurement standard sample
According to thus obtaining benchmark particulate matter described in testing sample and the corresponding relation between described candidate particles thing concentration.
Quality due to benchmark particulate matter and candidate particles thing is in proportionate relationship with concentration, therefore preferably described benchmark
Particulate matter and the corresponding particle diameter distribution of described candidate particles thing adopt described benchmark particulate matter and described candidate particles thing corresponding
Mass percent represents.
Further, set up between benchmark particulate matter described in described standard sample and the concentration of described candidate particles thing
The step of corresponding relation further includes：In described standard sample, the concentration of described benchmark particulate matter and candidate particles thing it
Between corresponding relation be expressed as：Wherein, P1 is the quality of benchmark particulate matter described in described standard sample
Percentage ratio, P2 are the mass percent of candidate particles thing described in described standard sample, and M1 is the concentration of described benchmark particulate matter
Value, M2 is the concentration value of described candidate particles thing.
When candidate particles thing be overall suspended pellet when, then in described standard sample, described benchmark particulate matter with always hang
Corresponding relation between the concentration of floating particles thing is expressed as：Wherein, P1 is benchmark described in described standard sample
The mass percent of particulate matter, M1 is the concentration value of described benchmark particulate matter, and M3 is described concentration value.
Described benchmark particulate matter can be one of PM2.5, PM10, overall suspended pellet, and described candidate particles thing can
To be one of PM2.5, PM10, overall suspended pellet or several, certainly described candidate particles thing and described benchmark granule
Thing is not same.Described PM2.5 is fine particle, and finger ring border in the air equivalent aerodynamic diameter is less than or equal to 2.5um
's
Particulate matter；Described PM10 is pellet, and finger ring border in the air equivalent aerodynamic diameter is less than or equal to
The particulate matter of 10um；Described overall suspended pellet finger ring border in the air equivalent aerodynamic diameter is less than or equal to
The particulate matter of 100um, there is inclusion relation in described PM2.5, PM10, overall suspended pellet, described PM2.5 is described
A part of PM10, described PM10 is a part for overall suspended pellet.Because existing equipment accurate can measure PM2.5
Concentration it is preferable that described benchmark particulate matter be PM2.5, therefore the concentration according to PM2.5 can correspond to acquisition accurate to be measured
The concentration of particulate matter.
Based on first embodiment of the present invention, in detail below by granular material discharged in coal-burning power plant's flue gas
Measurement of concetration is as some specific embodiments in the present invention.
Specifically, collection gas with various discharges the multigroup standard sample under environment, and selected reference particulate matter is PM2.5,
Candidate particles thing is PM10 and overall suspended pellet, and concrete measuring method comprises the following steps S1a：Set up PM2.5 and to be measured
Corresponding relation between the concentration of grain thing；Step S2a, the concentration of PM2.5 described in measurement testing sample, and according to described correspondence
Relation obtains the concentration of described candidate particles thing.
Specifically, in step S1a, by entering to gas discharge-ring border under coal-burning power plant's generating set difference working condition
In standard sample after row dedusting, the particle diameter distribution of benchmark particulate matter and candidate particles thing is studied, and have studied employing
The particle diameter distribution situation of the standard sample after different dedusting technology dedusting, its result has the characteristics that：
1., under conditions of generating set operating mode determines, determination is compared in the distribution of its standard sample particle diameter.
2. dedusting technology determination under conditions of, its efficiency of dust collection be also substantially close to, through identical dedusting technology
After, standard sample particle diameter distribution is also basically identical.
Based on These characteristics, under the conditions of the coal-burning power plant's generating set operating mode determining and dedusting technology, in standard sample
It is certain that PM2.5, PM10 account for overall suspended pellet mass percent, only need to measure the concentration of emission of PM2.5 so that it may according to right
The corresponding relation of the mass percent answered and concentration obtains the concentration of emission of PM10 and overall suspended pellet.Specifically, determining
Coal-burning power plant's generating set operating mode and dedusting technology under the conditions of, P1 is the percent mass of PM2.5 described in described standard sample
Than, P2 is the mass percent of PM10 described in described standard sample, PM2.5 concentration of emission by measuring apparatus test obtain for
M1, in conjunction with following corresponding relation：Formula (1) and formula (2) obtain the concentration of emission M2 of PM10 and the row of overall suspended pellet
Put concentration M3, concrete formula is as follows：
Further, the different discharge environment based on different operating modes and dedusting technology, obtain multigroup described standard sample
Described in benchmark particulate matter and the corresponding particle diameter distribution relation of described candidate particles thing, described base is set up according to particle diameter distribution relation
Quasi- particulate matter and the parameter database required for concentration corresponding relation of described candidate particles thing.To different operating modes and dedusting technology
Discharge environment under overall suspended pellet carry out the statistics of particle diameter distribution, the particle diameter distribution according to overall suspended pellet can be analyzed
Go out the parameter that benchmark particulate matter accounts for the mass percent of overall suspended pellet with candidate particles thing, thus obtaining described ginseng further
Number data base.
The step of specific Database includes step S1a1-S1a2.
Step S1a1：The different operating modes at record coal-burning power plant scene and corresponding difference dedusting technology；
Step S1a2：Particle diameter distribution measurement is carried out to multigroup standard sample at coal-burning power plant scene in described step S1a1；
Step S1a3：Particle diameter distribution in described step S1a2 is carried out with sorting-out in statistics and obtains benchmark particulate matter and candidate particles
The corresponding mass percent of thing, and carry out repeating verification experimental verification.
Specifically, operating mode described in step S1a1 include coal quantity, the generated output of generating set, smoke moisture,
Flue gas composition etc..Described dedusting technology includes mechanical type dedusting, wet dust removal, electrostatic precipitation, bag-type dusting etc..In step S1a2
In insert in the flue containing particulate matter by sampler, to obtain particulate matter, can be according to GB/T 15432-1995《Surrounding air
The gravimetry method of overall suspended pellet》Standard be sampled.Using Particle Size Analyzer, the overall suspended pellet obtaining is entered
The measurement of row particle diameter distribution, obtains grain size distribution, through being fitted and counting can drawing parameter respectively to grain size distribution
Data P1 and P2, that is, PM2.5, PM10 account for the mass percent of overall suspended pellet.
Specifically, in step S2a, the concentration of PM2.5 in testing sample under measurement current working and dedusting technology, according to
Concentration corresponding relation between PM2.5 and candidate particles thing under current working and dedusting technology, in the above-mentioned data base of corresponding acquisition
Supplemental characteristic under current working and dedusting technology, and calculate acquisition candidate particles thing concentration of emission according to described corresponding relation
Value.
Further, S2a comprises the following steps：
Step S2a1：In real time the candidate particles thing of diverse location discharge in the flue of coal-burning power plant is sampled；
Step S2a2：The concentration of measurement PM2.5；
Step S2a3：Obtain the data value of PM2.5 concentration；
Step S2a4：According to current in the different discharge environment above-mentioned data base of corresponding acquisition of current working and dedusting technology
Supplemental characteristic under operating mode and dedusting technology, the PM2.5 concentration data value obtaining in conjunction with measurement and PM2.5 and candidate particles thing
Concentration between corresponding relation obtain candidate particles thing concentration of emission value.
Step S2a5：By the real-time concentration of emission value storage obtaining candidate particles thing.
Specifically, in step S2a1, during air flue emission candidate particles thing is passed through due to coal-burning power plant, in flue
The candidate particles thing of various location concentration different, therefore all can improve result using for measuring in various location
Accuracy.In step S2a2, by the measurement of concetration to PM2.5 in particulate matter to be measured for the measuring apparatus, will be dense for the PM2.5 of measurement
Degrees of data analog signal output.In step S2a3, the data mould of the PM2.5 concentration measuring by reception and by measuring apparatus
Intend signal and be converted to the digital signal that can be identified by computer, that is, obtain the concentration value of PM2.5.In step S2a5, the later stage can
By the concentration of emission value of storage, the emission behaviour of coal-burning power plant is analyzed.
A specific embodiment in order to obtain the concentration of emission of the higher candidate particles thing of accuracy further, in the present invention
In, using the concentration of Pegasor Mi3 device measuring PM2.5 in candidate particles thing of Finland, this Pegasor Mi3 equipment energy
Enough accurate measure the concentration that particle diameter is less than the particulate matter of 2.5um, and the concentration range that this equipment can be measured is
0.001-300mg/m3.Specifically, in real time benchmark particulate matter PM2.5 is measured based on described Pegasor Mi3 equipment, its
Measure based on electric charge escape mechanism thus obtaining the concentration data of PM2.5, and by the concentration data of this PM2.5 with 4-20mA's
Analog signal output, described analogue signal is again through being converted into digital signal.Operating mode according to coal-burning power plant and dedusting technology, adjust
With mass percent P1 of overall suspended pellet and P2 shared by PM2.5, PM10 under operating mode corresponding in data base and dedusting technology
Supplemental characteristic, the concentration value of PM2.5 that obtain measurement and P1, P2 of calling substitute into formula (1) and formula (2) calculates acquisition
The concentration of emission of candidate particles thing, finally stores to the concentration of emission of the candidate particles thing obtaining, so as to the later stage to combustion
The emission behaviour of coal-fired plant is analyzed.
Further, the present invention provides specific examples below to be described further.Table 1 is measured multiple standard samples
After product, PM2.5, PM10 under obtained different dedusting methods account for the mass percent of overall suspended pellet.
PM2.5, PM10 under the different dedusting method of table 1 accounts for the mass percent of overall suspended pellet
| Project | Dedusting method | PM2.5 | PM10 |
| First specific embodiment | Dust removal with machine | 29.5% | 57.9% |
| Second specific embodiment | Wet dust removal | 29.5% | 71.6% |
| 3rd specific embodiment | Electrostatic precipitation | 30.6% | 60.1% |
| 4th specific embodiment | Electrostatic precipitation adds wet desulphurization | 64.1% | 78.7% |
| 5th specific embodiment | Bag-type dusting | 25.2% | 42.6% |
First specific embodiment：PM2.5 under current working, in correspondence database after the dust removal with machine mode dedusting
The mass percent accounting for overall suspended pellet is 29.5% (P1), and the mass percent that PM10 accounts for overall suspended pellet is 57.9%
(P2) concentration, measuring PM2.5 in candidate particles thing under current working using Pegasor Mi3 equipment in real time is 2.60mg/
m3(M1) concentration that, can obtain PM10 in real time in conjunction with formula (1) and formula (2) is 5.10mg/m3(M2), overall suspended pellet
Concentration be 8.81mg/m3(M3).
Second specific embodiment：PM2.5 under current working, in correspondence database after the wet dust removal mode dedusting
The mass percent accounting for overall suspended pellet is 29.5% (P1), and the mass percent that PM10 accounts for overall suspended pellet is 71.6%
(P2) concentration, measuring PM2.5 in candidate particles thing under current working using Pegasor Mi3 equipment in real time is 2.60mg/
m3(M1) concentration that, can obtain PM10 in real time in conjunction with formula (1) and formula (2) is 6.31mg/m3(M2), overall suspended pellet
Concentration be 8.81mg/m3(M3).
3rd specific embodiment：PM2.5 under current working, in correspondence database after the electrostatic precipitation mode dedusting
The mass percent accounting for overall suspended pellet is 30.6% (P1), and the mass percent that PM10 accounts for overall suspended pellet is 60.1%
(P2) concentration, measuring PM2.5 in candidate particles thing under current working using Pegasor Mi3 equipment in real time is 2.60mg/
m3(M1) concentration that, can obtain PM10 in real time in conjunction with formula (1) and formula (2) is 5.11mg/m3(M2), overall suspended pellet
Concentration be 8.50mg/m3(M3).
4th specific embodiment：Under current working, corresponding data after electrostatic precipitation humidifies method desulfurization method dedusting
The mass percent that PM2.5 in storehouse accounts for overall suspended pellet is 64.1% (P1), and PM10 accounts for the quality hundred of overall suspended pellet
Point than for 78.7% (P2), the dense of PM2.5 in candidate particles thing under current working is measured in real time using Pegasor Mi3 equipment
Spend for 2.60mg/m3(M1) concentration that, can obtain PM10 in real time in conjunction with formula (1) and formula (2) is 3.19mg/m3(M2), always
The concentration of suspended particulate substance is 4.06mg/m3(M3).
5th specific embodiment：PM2.5 under current working, in correspondence database after the bag-type dusting mode dedusting
The mass percent accounting for overall suspended pellet is 25.2% (P1), and the mass percent that PM10 accounts for overall suspended pellet is 42.6%
(P2) concentration, measuring PM2.5 in candidate particles thing under current working using Pegasor Mi3 equipment in real time is 2.60mg/
m3(M1) concentration that, can obtain PM10 in real time in conjunction with formula (1) and formula (2) is 4.40mg/m3(M2), overall suspended pellet
Concentration be 10.32mg/m3(M3).
The first specific embodiment in sum, to the 5th specific embodiment, passes through to select in the data base of foundation
Under field working conditions and dedusting method, corresponding PM2.5 and PM10 of typically each dedusting method respectively shared by overall suspended pellet matter
Amount percentage ratio is certain, therefore can be according to PM10 in acquisition candidate particles thing under field working conditions and certain dedusting method and total suspension
The concentration of emission of grain thing.
In the other specific embodiment of the present invention, in selected testing sample, benchmark particulate matter is P10, measuring apparatus
It is capable of the concentration of accurate measurement PM10, candidate particles thing is one of PM2.5, overall suspended pellet or several, leads to
Cross the corresponding relation set up between PM10 and the concentration of candidate particles thing；Measured in testing sample by above-mentioned measuring apparatus
The concentration of PM10, and the concentration of described candidate particles thing is obtained according to described corresponding relation.
Further, described corresponding relation is expressed as： Wherein, P1 ' is described
The mass percent of PM2.5, the mass percent for PM10 in standard sample for the P2 ' in standard sample, M1 ' is PM2.5 concentration value,
M2 ' is PM10 concentration value, and M3 ' is TSP concentration value.
In other specific embodiments of the present invention, in selected testing sample, benchmark particulate matter is total suspended particles, surveys
Amount equipment is capable of the concentration of accurate measurement overall suspended pellet, and candidate particles thing is PM2.5, PM10, is always hanged by setting up
Corresponding relation between the concentration of floating particles thing and candidate particles thing；Measure the dense of overall suspended pellet by above-mentioned measuring apparatus
Degree, and the concentration of described candidate particles thing is obtained according to described corresponding relation.Described corresponding relation is expressed as：M1 "=M3 " ×
P1 ", M2 "=M3 " × P2 ", wherein, P1 " be the mass percent of PM2.5, P2 in standard sample " it is PM10 in standard sample
Mass percent, M1 " is PM2.5 concentration value, M2 " be PM10 concentration value, M3 " for overall suspended pellet concentration value.
In the present invention, above-mentioned specific embodiment is only example, is not intended as the restriction of the present invention.
Refer to Fig. 3, the second embodiment of the present invention provides granular material discharged concentration measurement system in a kind of gas, its
Including：
First processing units 10, for gathering the multigroup standard sample under gas with various discharge environment, and select a benchmark
Particulate matter and at least one candidate particles thing, set up under corresponding discharge environment benchmark particulate matter described in described standard sample with described
Corresponding relation between the concentration of candidate particles thing；
Second processing unit 20, for measuring benchmark particulate matter described in the testing sample under corresponding gas discharge environment
Concentration, and the concentration of described candidate particles thing is obtained according to described corresponding relation.
Specifically, by first processing units 10 gather gas with various discharge environment under multigroup standard sample, and
A benchmark concentration and at least one candidate particles thing is selected in multigroup standard sample, and the benchmark particulate matter in measurement standard sample
And candidate particles thing corresponding particle diameter distribution relation, benchmark particulate matter and to be measured are obtained by described particle diameter distribution relation statistics
The grain corresponding mass percent of thing is in order to set up the corresponding relation between benchmark particulate matter and candidate particles thing.Treat test sample in measurement
During the concentration of emission of candidate particles thing in product, the dense of benchmark particulate matter in testing sample is measured by second processing unit 20
Degree, and the corresponding concentration discharging environment candidate particles thing is calculated according to the corresponding relation that first processing units 10 obtain.
In order to obtain the concentration of accurate candidate particles thing further, in some embodiments of the invention, described
One processing unit 10 further includes data acquisition module 101, data processing module 102；Described second processing unit 20 enters one
Step includes measurement module 201, computing module 202.Data acquisition module 101, for obtaining described in multigroup described standard sample
Benchmark particulate matter and the corresponding particle diameter distribution relation of described candidate particles thing, light scatter intensity distribution relation, volume distributed median relation
One of；Data processing module 102, obtains the concentration of benchmark particulate matter described in described standard sample for measurement, and according to
According to one of described particle diameter distribution relation, light scatter intensity distribution relation, volume distributed median relation, set up in described standard sample
Corresponding relation between the concentration of described benchmark particulate matter and described candidate particles thing.Measurement module 201, for treating described in measuring
The concentration of benchmark particulate matter in test sample product；Computing module 202, based in the described testing sample that described measurement module 201 obtains
Benchmark particle concentration, and the concentration of the described corresponding relation described candidate particles thing of acquisition.
Above-mentioned corresponding relation can be set up when measuring testing sample or pre-build.Because particle diameter divides
Cloth relation can accurate obtain, and therefore, sets up it is preferable that described distribution relation is particle diameter distribution relation during corresponding relation,
Benchmark particulate matter described in multigroup described standard sample is obtained by data acquisition module 101 and described candidate particles thing is corresponding
Particle diameter distribution relation.Particle diameter distribution relation is conveyed to data processing module 102 by data acquisition module 101；Data processing module
102 pass through measurement standard sample in benchmark particulate matter concentration, and statistics particle diameter distribution relation in benchmark particulate matter with to be measured
Grain thing corresponding mass percent relation, finally processes the corresponding pass obtaining between benchmark particulate matter and the concentration of candidate particles thing
System.
After setting up the corresponding relation between benchmark particulate matter and the concentration of candidate particles thing, based on described corresponding relation,
Measure the concentration of benchmark particulate matter in testing sample by measurement module 201, recycle computing module 202 to be based on this benchmark granule
Benchmark particulate matter described in the corresponding standard sample of thing concentration and the particle diameter distribution relation of described candidate particles thing, according to described corresponding
Relation obtains the concentration of described candidate particles thing.
Described data acquisition module 101 further includes data base's (not shown), and described data base includes described standard sample
Benchmark particulate matter described in product and the corresponding particle diameter distribution relation of described candidate particles thing.
Further, described data base is to form benchmark described in multigroup standard sample based on described particle diameter distribution relation
The parameter database of the grain thing mass percent corresponding with described candidate particles thing, described mass percent parameter includes benchmark
Particulate matter accounts for the percent mass of overall suspended pellet, and when candidate particles thing accounts for the mass percent of overall suspended pellet respectively.
In some specific embodiments of the present invention, when benchmark granule is PM2.5, described measurement module 201 can be selected for sweet smell
Blue Pegasor Mi3 equipment, described Pegasor Mi3 equipment is based on the measurement of electric charge escape mechanism and obtains accurate PM2.5
Concentration value.Benchmark granule in multigroup standard sample has been pre-build by data acquisition module 101 data processing module 102
Corresponding relation between thing and candidate particles thing concentration.Measurement module 201 is by candidate particles thing in testing sample
Measured PM2.5 concentration is conveyed to computing module 202 after measuring by the concentration of PM2.5, and computing module 202 is based on
In PM2.5 concentration and candidate particles thing particle size distribution data storehouse benchmark particulate matter described in corresponding described standard sample with described
The particle diameter distribution relation of candidate particles thing, according to described corresponding relation obtain described candidate particles thing concentration.
In order that the candidate particles thing concentration of present invention measurement can carry out statistical analysiss, described second processing unit 20 enters one
Step includes data display memory module 203, obtains described candidate particles thing for showing and storing by described computing module 202
Concentration.By the storage to particle concentration to be measured, the concentration of the candidate particles thing to a period of time can be facilitated to be analyzed.
Compared with prior art, in granular material discharged concentration measuring method in a kind of gas that the present invention provides, by building
Vertical corresponding gas discharges the corresponding relation between the concentration of benchmark particulate matter and candidate particles thing in environment Plays sample；Measurement
The concentration of benchmark particulate matter in testing sample, and obtain the concentration of candidate particles thing according to corresponding relation, due to based on more accurate
Benchmark particulate matter concentration carry out calculate obtain candidate particles thing concentration, compare traditional measuring method more fast in real time
Victory, and improve the accuracy of measurement result.
Based on the particle diameter distribution relation of benchmark particulate matter in described standard sample and described candidate particles thing, benchmark can be obtained
Proportionate relationship between particulate matter and candidate particles thing, and benchmark particulate matter and candidate particles thing are set up according to described proportionate relationship
Between concentration corresponding relation.Due to particle diameter distribution relation can be overall count benchmark particulate matter and candidate particles in standard sample
The proportionate relationship of thing, therefore can be obtained with reference to corresponding relation by the concentration of benchmark particulate matter in wherein one accurate testing sample
Accurate candidate particles thing concentration.
Compared with prior art, in a kind of gas that the present invention provides in granular material discharged concentration measurement system, by the
One processing unit selectes a benchmark particulate matter and at least one candidate particles thing in multigroup standard sample, sets up described standard sample
Corresponding relation between middle benchmark particulate matter and the concentration of candidate particles thing, then measured in testing sample by second processing unit
The concentration of benchmark particulate matter, and obtain the concentration of described candidate particles thing according to described corresponding relation, by selected reference granule
Thing, if the concentration of benchmark particulate matter can accurate be recorded, by this benchmark particulate matter concentration obtain candidate particles thing dense
Degree is more accurate, and therefore, this system can obtain the concentration of accurate candidate particles thing.
Further benchmark particulate matter and candidate particles thing in multigroup standard sample are obtained by data acquisition module corresponding
Particle diameter distribution relation, by data processing module according to particle diameter distribution relation obtain benchmark particulate matter and candidate particles thing concentration it
Between corresponding relation, the particle diameter distribution relation of acquisition can accurate get standard samples middle benchmark particulate matter and candidate particles thing
Between proportionate relationship, the concentration of the candidate particles thing therefore finally giving is also accordingly more accurate.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all former in the present invention
Any modification made within then, equivalent and improvement etc. all should comprise within protection scope of the present invention.
Claims (10)
1. in a kind of gas granular material discharged concentration measuring method it is characterised in that：Step S1, collection gas with various discharge environment
Under multigroup standard sample, and select a benchmark particulate matter and at least one candidate particles thing, set up described under corresponding discharge environment
Corresponding relation between the concentration of benchmark particulate matter described in standard sample and described candidate particles thing；Step S2, for measuring
The concentration of benchmark particulate matter described in testing sample under corresponding gas discharge environment, and obtain described according to described corresponding relation
The concentration of candidate particles thing.
2. as described in the appended claim 1 in gas granular material discharged concentration measuring method it is characterised in that：In described step S1 tool
Body is：Step T101, obtains benchmark particulate matter and the corresponding particle diameter of described candidate particles thing described in multigroup described standard sample
One of distribution relation, light scatter intensity distribution relation, volume distributed median relation；Step T102, measurement obtains described standard sample
The concentration of benchmark particulate matter described in product, and close according to described particle diameter distribution relation, light scatter intensity distribution relation, volume distributed median
One of system, sets up the corresponding pass between benchmark particulate matter described in described standard sample and the concentration of described candidate particles thing
System.
3. as stated in claim 2 in gas granular material discharged concentration measuring method it is characterised in that：Described distribution relation is
Particle diameter distribution relation, above-mentioned steps T101 further include：Based on benchmark granule described in the multigroup described standard sample obtaining
Thing and the corresponding particle diameter distribution relation of described candidate particles thing are set up one and are included described benchmark particulate matter and described candidate particles thing
Between one of number percent, percent by volume, mass percent or several data bases.
4. as stated in claim 2 in gas granular material discharged concentration measuring method it is characterised in that：Described distribution relation is
Particle diameter distribution relation, above-mentioned steps T102 are specially：Described particle diameter distribution relation benchmark granule described in described standard sample
The mass percent of thing and described candidate particles thing represents, in described standard sample, described benchmark particulate matter is to be measured with described
Corresponding relation between the concentration of particulate matter is expressed as：Wherein, P1 is base described in described standard sample
The mass percent of quasi- particulate matter, P2 are the mass percent of candidate particles thing described in described standard sample, and M1 is described base
The concentration value of quasi- particulate matter, M2 is the concentration value of described candidate particles thing.
5. in gas as described in any one of claim 1-4 granular material discharged concentration measuring method it is characterised in that：Described base
Quasi- particulate matter is one of PM2.5, PM10, overall suspended pellet, and described candidate particles thing is PM2.5, PM10, always suspension
Grain one of thing or several, described candidate particles thing is not same with described benchmark particulate matter.
6. in a kind of gas granular material discharged concentration measurement system it is characterised in that：It includes：First processing units, are used for adopting
Collection gas with various discharges the multigroup standard sample under environment, and selectes a benchmark particulate matter and at least one candidate particles thing, sets up
Corresponding pass between benchmark particulate matter and the concentration of described candidate particles thing described in described standard sample under corresponding discharge environment
System；
Second processing unit, for measuring the concentration of benchmark particulate matter described in the testing sample under corresponding gas discharge environment,
And the concentration of described candidate particles thing is obtained according to described corresponding relation.
7. as recited in claim 6 in gas granular material discharged concentration measurement system it is characterised in that：Described first processes list
Unit includes：Data acquisition module, for obtaining benchmark particulate matter described in multigroup described standard sample and described candidate particles thing
One of corresponding particle diameter distribution relation, light scatter intensity distribution relation, volume distributed median relation；Data processing module, is used for
Measurement obtains the concentration of benchmark particulate matter described in described standard sample, and according to described particle diameter distribution relation, light scatter intensity
One of distribution relation, volume distributed median relation, set up benchmark particulate matter described in described standard sample and described candidate particles
Corresponding relation between the concentration of thing.
8. as recited in claim 7 in gas granular material discharged concentration measurement system it is characterised in that：Described distribution relation is
Particle diameter distribution relation, described data acquisition module further includes data base, and described data base includes institute in described standard sample
State benchmark particulate matter and the corresponding particle diameter distribution relation of described candidate particles thing.
9. as recited in claim 6 in gas granular material discharged concentration measurement system it is characterised in that：Described second processing list
Unit further includes：Measurement module, for measuring the concentration of benchmark particulate matter in described testing sample；And
Computing module, based on benchmark particle concentration in the described testing sample that described measurement module obtains, and described corresponding pass
System obtains the concentration of described candidate particles thing.
10. as claimed in claim 9 in gas granular material discharged concentration measurement system it is characterised in that：Described second processing
Unit further includes data display memory module, obtains described candidate particles thing for showing and storing by described computing module
Concentration.
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| CN108645817A (en) * | 2018-05-02 | 2018-10-12 | 华中科技大学 | A kind of polymorphic type hybrid particles amount of substance concentration On-line Measuring Method |
| WO2020047689A1 (en) * | 2018-09-05 | 2020-03-12 | 武汉四方光电科技有限公司 | Method and apparatus for simultaneously measuring mass concentrations of particulate matter with different particle sizes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103257095A (en) * | 2013-05-14 | 2013-08-21 | 中国环境科学研究院 | Grading test method and device of fine particulate matters in emission source |
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| CN103257095A (en) * | 2013-05-14 | 2013-08-21 | 中国环境科学研究院 | Grading test method and device of fine particulate matters in emission source |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645817A (en) * | 2018-05-02 | 2018-10-12 | 华中科技大学 | A kind of polymorphic type hybrid particles amount of substance concentration On-line Measuring Method |
| CN108645817B (en) * | 2018-05-02 | 2020-05-19 | 华中科技大学 | Multi-type mixed particle mass concentration online measurement method |
| WO2020047689A1 (en) * | 2018-09-05 | 2020-03-12 | 武汉四方光电科技有限公司 | Method and apparatus for simultaneously measuring mass concentrations of particulate matter with different particle sizes |
| US11555771B2 (en) | 2018-09-05 | 2023-01-17 | Cubic Sensor And Instrument Co., Ltd | Method and device for simultaneously measuring mass concentrations of particulates with different sizes |
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