CN107192648A - The assay method and system of PM2.5 cutter D50 uncertainties - Google Patents
The assay method and system of PM2.5 cutter D50 uncertainties Download PDFInfo
- Publication number
- CN107192648A CN107192648A CN201710416703.6A CN201710416703A CN107192648A CN 107192648 A CN107192648 A CN 107192648A CN 201710416703 A CN201710416703 A CN 201710416703A CN 107192648 A CN107192648 A CN 107192648A
- Authority
- CN
- China
- Prior art keywords
- mrow
- valve
- msub
- cutters
- mfrac
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XCIXKGXIYUWCLL-UHFFFAOYSA-N OC1CCCC1 Chemical compound OC1CCCC1 XCIXKGXIYUWCLL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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, e.g. by light scattering, diffraction, holography or imaging
-
- 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
Abstract
The invention provides a kind of assay method of PM2.5 cutters D50 uncertainties and system.The method that the assay method of PM2.5 cutters D50 uncertainties of the present invention takes section to be fitted using emphasis has carried out analyzing evaluation to the uncertainty of D50 in PM2.5 cutter cuts characteristic research, complicated cutting efficiency standard feature matched curve is replaced with into linearity curve, the uncertainty of linearity curve obtained by being determined as linear regression analysis, and then determine D50 uncertainty, it enormously simplify analysis calculating process, analysis exactly can be carried out to the uncertainty of D50 in PM2.5 cutter cuts characteristic research to determine, meet the magnitude tracing demand in China PM2.5 cutter detection process, reliable technological service can be provided for atmosphere environment supervision.
Description
Technical field
The present invention relates to Detection of Air Quality method and technology field, in particular to a kind of PM2.5 cutters D50 not
The assay method and system of degree of certainty.
Background technology
PM2.5 is particulate matter of the aerodynamic diameter less than or equal to 2.5 μm, also referred to as particulate matter in air
Thing.PM2.5 particle diameters are small, and residence time length, fed distance rich in substantial amounts of poisonous and harmful substances and in an atmosphere is remote, thus
Influence to health and atmosphere quality is bigger.PM2.5 particulate matters are used as the primary pollutant of China's air pollution.
PM2.5 is monitored and effectively administered, and is the important goal of Ministry of Environmental Protection's door and national government.Currently, from country to place,
From environmental protection, environmental monitoring department, to measurement technology supervisory organs at different levels, PM2.5 association area research works are all extremely paid close attention to
Make.With HJ618-2011《Surrounding air PM10With PM2.5 bioassay standard》、GB3095-《Ambient air quality》Issue
Cloth is implemented, and the monitoring of PM2.5 particulate matter quality concentration has become the most important thing of government work.
And PM2.5 measuring instruments are for PM2.5 particle monitorings in air, evaluate the indispensable hand of indoor and outdoor air quality
Section, the quality of its metering performance will be directly connected to the reliability of Monitoring Data.PM2.5 measuring instruments are by sampling apparatus, particle point
From device (PM2.5 cutters) and test and the part of data handling system three composition.Wherein, PM2.5 cutters are PM2.5 measuring instruments
The core devices of device, determine the size for collecting particulate matter, and PM2.5 cutter cuts Characteristics Detections are that PM2.5 monitoring results are accurate
The key point of true Journal of Sex Research.At present, domestic PM2.5 cutters lack corresponding technical standard and unified instrument testing detection
Means so that domestic PM2.5 cutters confidence level is relatively low, and most of measurement data cannot get public acceptance, cause major part
PM2.5 monitoring stations selection purchase foreign countries PM2.5 cutters.So, it is badly in need of effective assay means and carrys out Comprehensive Assessment PM2.5
Cutter performance is good and bad.
In recent years, the input increase with country to environmental protection industry (epi), PM2.5 Study on Monitoring Technology also increasingly starts to obtain
Pay attention to.What Chinese Ministry of Environmental Protection implemented for 2011《HJ618-2011 surrounding airs PM10With PM2.5 measure gravimetric method》To the property of cutter
It can be specified below：Cutter is to Particulate Air dynamics equivalent diameter corresponding when the cutting efficiency of particulate matter is 50%
D50Need to be in (2.5 ± 0.2) μ m.So, D50Uncertainty is also just cut as an important index to investigate PM2.5
Cutter cutting performance, but do not have correlative study analysis in the prior art.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is the assay method for providing PM2.5 cutter D50 uncertainties, and this method is simply just
Victory, can carry out analysis exactly to the uncertainty of D50 in PM2.5 cutter cuts characteristic research and determine, meet China
Magnitude tracing demand in PM2.5 cutter detection process, can provide reliable technological service for atmosphere environment supervision.
The second object of the present invention is to provide a kind of survey using a kind of above-mentioned PM2.5 cutters D50 uncertainties
Determine the measurement system of method, described measurement system can be entered to the uncertainty of D50 in PM2.5 cutter cuts characteristic research
Quick and precisely analysis is determined row, is met the magnitude tracing demand in China PM2.5 cutter detection process, can is atmospheric environment
Monitoring provides reliable technological service.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of assay method of PM2.5 cutters D50 uncertainties, using PM2.5 cutter cuts characteristic detection devices
Measuring and calculation is carried out to the average cutting efficiency of different-grain diameter standard particle to selected PM2.5 cutters, and is fitted cutting
Efficiency standard property fitting curve；
The method for taking emphasis to take section to be fitted, centered on the focus point of whole cutting efficiency standard feature matched curve,
Take multiple experimental points respectively before and after the focus point, taken each experimental point is fitted and obtains linearity curve, by straight
Line regression analysis come determine gained linearity curve uncertainty, and then determine D50 uncertainty.
The method that the assay method of PM2.5 cutters D50 uncertainties of the present invention takes section to be fitted using emphasis is cut to PM2.5
D50 uncertainty has carried out analyzing evaluation in cutter cutting characteristic research, complicated cutting efficiency standard feature is fitted bent
Line replaces with linearity curve, determined as linear regression analysis obtained by linearity curve uncertainty, and then determine D50 not
Degree of certainty, enormously simplify analysis calculating process, and the uncertainty of D50 in PM2.5 cutter cuts characteristic research can be entered
Analysis is determined row exactly, meets the magnitude tracing demand in China PM2.5 cutter detection process, can be atmospheric environment prison
Survey and reliable technological service is provided.
Preferably, the cutting efficiency that can obtain different-grain diameter standard particle is calculated as follows：
In formula：The aerosol particle diameter point of i ... ... generations；
The number of times of each particle diameter point measurements of j ... ...；
N1ij... the solid-state monodisperse particles thing concentration of PM2.5 cutters upstream；
N2ij... the solid-state monodisperse particles thing concentration in PM2.5 cutters downstream；
ηij... ... the arresting efficiency of each particle diameter point single measurement；
Calculate the cutting efficiency for obtaining different-grain diameter point respectively by formula (1)；
The average cutting efficiency of each particle diameter point is calculated as follows：
In formula：... ... ... ... the average cutting efficiency of each particle diameter point.
Preferably, the equation of the cutting efficiency standard feature matched curve is：
Wherein, a, b, c, d and e value are directly determined by fitting.
Preferably, in cutting efficiency standard feature matched curve cutting efficiency be 10%-90% between take the experiment
Point.
Preferably, the equation of the linearity curve is：
Y=ax+b；
Wherein, a and b value is directly determined by fitting.
Preferably, it is described to be included as linear regression analysis come the uncertainty of linearity curve obtained by determining：
Standard particle particle diameter and corresponding average cutting efficiency are substituted into be fitted linearity curve equation, calculates and returns
Standard deviation estimate s：
In above formula, yiFor the corresponding cutting efficiency value of various criterion grain diameter；For obtained from linearity curve and xi
Corresponding yiCalculated value；N is testing time.
Preferably, so determine D50 uncertainty
Corresponding particle diameter x when cutting efficiency is 50% is calculated again0Standard deviation estimate s (x0)：
In above formula,For the average value for whole x values used in linear curve；It is the average value of whole y values；y0
It is 50% to represent cutting efficiency；B is the slope of linearity curve；M is parallel testing number of times；
Afterwards, confidence level is chosen, t distribution tables is looked into, determines the free degree, to D50Expanded uncertainty calculated.
Preferably, the PM2.5 cutter cuts characteristic detection device used, which includes compressed air source unit, condensation aerosol, to be occurred
Device, drier, electrostatic charge neutralization, mixing pipe, aerosol particle diameter spectrometer, aspiration pump, the first valve, the second valve, the 3rd valve
With the 4th valve；
The output end of the compressed air source unit is connected with the input of the condensation aerosol generator, and the atomization gas is molten
The output end of generator is connected with the input of the drier, the output end of the drier and the electrostatic charge neutralization
Input is connected, and the output end of the electrostatic charge neutralization is connected with the input of the mixing pipe；
It is described mix pipe output end be connected with the input of first valve, the output end of first valve and
The aerosol particle diameter spectrometer is connected；
Input of the output end for mixing pipe also with PM2.5 cutters to be detected is connected, the PM2.5 to be detected
The output end of cutter is connected with the input of second valve, output end and the aerosol particle of second valve
Footpath spectrometer is connected；
Input of the input of first valve also with the 3rd valve is connected, the output of the 3rd valve
End is connected with the input of the aspiration pump；
Input of the input of second valve also with the 4th valve is connected, the output of the 4th valve
End is connected with the input of the aspiration pump.
Preferably, the method detected using the PM2.5 cutter cuts characteristic detection device, including following step
Suddenly：
Ultra-pure water and standard particle suspension are added into the condensation aerosol generator, to produce single dispersing invented solid gas
Sol particle, wherein, the standard particle of a variety of different-grain diameters, and the mark of a variety of different-grain diameters are contained in the standard particle supernatant liquid
The content of quasi- particle is definite value；
First valve and the 3rd valve are opened, is closed after second valve and the 4th valve, is read
The aerosol particle number concentration value that the aerosol particle diameter spectrometer measurement is measured；
Second valve and the 4th valve are opened, is closed after first valve and the 3rd valve, is read
The aerosol particle number concentration value that the aerosol particle diameter spectrometer measurement is measured.
Using a kind of measurement system of the assay method of above-mentioned PM2.5 cutters D50 uncertainties.
Measurement system of the present invention can carry out quick accurate to the uncertainty of D50 in PM2.5 cutter cuts characteristic research
Really analysis is determined, and is met the magnitude tracing demand in China PM2.5 cutter detection process, can be provided for atmosphere environment supervision
Reliable technological service.
Compared with prior art, beneficial effects of the present invention are：
The method that the assay method of PM2.5 cutters D50 uncertainties of the present invention takes section to be fitted using emphasis is cut to PM2.5
D50 uncertainty has carried out analyzing evaluation in cutter cutting characteristic research, complicated cutting efficiency standard feature is fitted bent
Line replaces with linearity curve, determined as linear regression analysis obtained by linearity curve uncertainty, and then determine D50 not
Degree of certainty, enormously simplify analysis calculating process, and the uncertainty of D50 in PM2.5 cutter cuts characteristic research can be entered
Analysis is determined row exactly, meets the magnitude tracing demand in China PM2.5 cutter detection process, can be atmospheric environment prison
Survey and reliable technological service is provided.
Measurement system of the present invention can carry out quick accurate to the uncertainty of D50 in PM2.5 cutter cuts characteristic research
Really analysis is determined, and is met the magnitude tracing demand in China PM2.5 cutter detection process, can be provided for atmosphere environment supervision
Reliable technological service.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the PM2.5 cutter cuts characteristic detection device structural representations that the embodiment of the present invention 1 is provided；
Fig. 2 is the structural representation of compressed air source unit in the embodiment of the present invention 1；
Fig. 3 is the structural representation of mixing pipe in the embodiment of the present invention 1；
Fig. 4 is the flow chart of the detection method of PM2.5 cutter cuts characteristic detection devices in the embodiment of the present invention 2；
Fig. 5 is gained cutting efficiency standard feature matched curve figure in the embodiment of the present invention 3；
Fig. 6 be the embodiment of the present invention 3 in gained cutting efficiency standard feature matched curve on linear curve map；
Reference：100- compressed air source units；102- condensation aerosol generators；103- driers；104- electrostatic charge neutralizations；
105- mixes pipe；106- aerosol particle diameter spectrometers；107- aspiration pumps；The valves of 108- first；The valves of 109- second；The valves of 110- the 3rd
Door；The valves of 111- the 4th；112- mass flow controllers；113- air compressors；114- air accumulators；115- stage high-effectives are filtered
Device；116- freeze driers；117- the first tonifying Qi pipelines；118- the second tonifying Qi pipelines；The valves of 119- the 5th；The valves of 120- the 6th
Door；121- inverted cone-shaped structures；122- stream splitters；123- tonifying Qi end；124- PM2.5 cutters to be detected；The valves of 125- the 7th
Door.
Embodiment
Technical scheme is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that following described embodiment is a part of embodiment of the invention, it is rather than whole
Embodiment, is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to guarantor of the present invention
The scope of shield.Unreceipted actual conditions person in embodiment, the condition advised according to normal condition or manufacturer is carried out.Agents useful for same
Or the unreceipted production firm person of instrument, it is the conventional products that can be obtained by commercially available purchase.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
PM2.5 cutting characteristics detection means is mainly neutralized by gas source generator, atomizing generator, drier, electrostatic
Device, mixing pipe, current divider, aerosol particle diameter spectrometer composition.The pure air of compression is formed monodispersed by atomizing generator
Polystyrene aerosol, by drying, is destaticed, and is mixed mixing in-line dilution, is reached uniform and stable state.By current divider
After be divided into upstream and downstream two-way, upstream branch is directly connected to particle diameter spectrometer, and downstream is first passed through equipped with PM2.5 cuttings to be measured
Device, is connected to particle diameter spectrometer, by switching solenoid valve door, so as to realize that particle diameter spectrometer alternately measures the aerosol in two-way
Grain number concentration.
Embodiment 1
Referring to shown in Fig. 1 to Fig. 3, the embodiment of the present invention one provides a kind of PM2.5 cutter cuts characteristic detection device,
Including compressed air source unit 100, condensation aerosol generator 102, drier 103, electrostatic charge neutralization 104, mixing pipe 105, aerosol
Particle diameter spectrometer 106, aspiration pump 107, the first valve 108, the second valve 109, the 3rd valve 110 and the 4th valve 111；Source of the gas is filled
The output end for putting 100 is connected with the input of condensation aerosol generator 102, specifically, the output end of compressed air source unit 100
The 5th valve 119 is also communicated between the input of condensation aerosol generator 102；The output end of the molten generator of atomization gas with
The input of drier 103 is connected, and the output end of drier 103 is connected with the input of electrostatic charge neutralization 104, in electrostatic
It is connected with the output end of device 104 with mixing the input of pipe 105；Mix the output end of pipe 105 and the input of the first valve 108
End is connected, and the output end of the first valve 108 is connected with aerosol particle diameter spectrometer 106；The output end of pipe 105 is mixed also with treating
The input of detection PM2.5 cutters is connected, the output end of PM2.5 cutters to be detected and the input of the second valve 109
It is connected, the output end of the second valve 109 is connected with aerosol particle diameter spectrometer 106；The input of first valve 108 is also with
The input of three valves 110 is connected, and the output end of the 3rd valve 110 is connected with the input of aspiration pump 107, it is specific and
Speech, the tie point of output end of the input of the first valve 108 with mixing pipe 105 is connected with the input of the 3rd valve 110；
Input of the input of second valve 109 also with the 4th valve 111 is connected, the output end and aspiration pump of the 4th valve 111
107 input is connected, specifically, the input of the second valve 109 and the company of the output end of PM2.5 cutters to be detected
Contact is connected with the input of the 4th valve 111.
In the embodiment, PM2.5 cutter cuts characteristic detection device also includes mass flow controller 112, aspiration pump
107 input is connected with the output end of mass flow controller 112, the output end of the 4th valve 111, the 3rd valve 110
Input of the output end respectively with mass flow controller 112 be connected.Specifically, the output end of the 4th valve 111 with
The tie point of the output end of 3rd valve 110 is connected with the input of mass flow controller 112, mass flow controller
112 output end is connected with the input of aspiration pump 107.
In the embodiment, compressed air source unit 100 includes air compressor 113, air accumulator 114, the and of stage high-effective filter 115
Freeze drier 116, wherein, air compressor 113, air accumulator 114, stage high-effective filter 115 and freeze drier 116 according to
Secondary connection, and freeze drier 116 is also connected with condensation aerosol generator 102.
Specifically, the output end of air compressor 113 is connected with the input of air accumulator 114, air accumulator 114 it is defeated
Go out end with the input of stage high-effective filter 115 to be connected, the output end and freeze drier of stage high-effective filter 115
116 input is connected, and the output end of freeze drier 116 is connected with the input of condensation aerosol generator 102.It is empty
Air is compressed in air accumulator 114 by air compressor 113, and particle diameter is obtained after being filtered through stage high-effective filter 115 less than 0.3 μm
Clean gas source, hydrous matter in clean gas source is first frozen into solid-state, makes moisture therein from solid-state liter by freeze drier 116
China is into gaseous state, so that dry purpose is reached, wherein, the processing tolerance of freeze drier 116 is 1.5m3/min。
In the embodiment, baroceptor is installed on air accumulator 114, the pressure for detecting gas in air accumulator 114.
PM2.5 cutter cuts characteristic detection device also includes controller, air compressor 113, freeze drier 116, aspiration pump 107
It is electrically connected with the controller respectively.The gas pressure intensity in air accumulator 114 can be made to control the scope in setting by baroceptor
It is interior, continual and steady source of the gas is provided for follow-up process.Detailed process is：Air accumulator 114 and air compressor 113 have automatic
Regulatory function, when the pressure in air accumulator 114 reaches 0.6MPa, baroceptor sends pressure information, control to controller
Device is received after the pressure information of baroceptor transmission, air compressor 113 is stopped, so as to ensure air accumulator 114
Pressure be in safe range.With continuing on for source of the gas, the pressure in air accumulator 114 is gradually reduced, and works as baroceptor
When detecting the air pressure pressure in air accumulator 114 and dropping to 0.4MPa, baroceptor sends pressure information, controller to controller
After the pressure information for receiving baroceptor transmission, air compressor 113 is reworked, continue to manufacture dry clean gas
Body, continually stable source of the gas is provided so as to can guarantee that for follow-up process.
In the embodiment, first is also communicated between the output end of compressed air source unit 100 and the input of electrostatic charge neutralization 104
Tonifying Qi pipeline 117, can directly input clean source of the gas, with diluent gas by the first tonifying Qi pipeline 117 in first electrostatic charge neutralization 104
In particle concentration.The 6th valve 120 is provided with first tonifying Qi pipeline 117.
In the embodiment, mixing the top of pipe 105 has inverted cone-shaped structure 121, and the input for mixing pipe 105 is located at back taper
The end of shape structure 121.
Specifically, the second tonifying Qi pipeline 118 is also communicated between compressed air source unit 100 and mixing pipe 105, wherein, source of the gas
The output end of device 100 is connected with one end of the second tonifying Qi pipeline 118, and the other end of the second tonifying Qi pipeline 118 is with mixing pipe 105
Tonifying Qi end 123 be connected, and tonifying Qi end is extend at the conical surface of inverted cone-shaped structure 121, for making from the second tonifying Qi pipeline 118
Conical surface flowing of the gas of outflow along inverted cone-shaped structure 121.The input of first valve 108, PM2.5 cutters to be detected it is defeated
Enter end by stream splitter 122 with mixing the output end of pipe 105 to be connected.The 7th is provided with second tonifying Qi pipeline 118
Valve.
By detecting experiment, when the length for mixing pipe 105 is 100mm, the aerosol on the cross section of pipe 105 is mixed
Volume fraction just no longer changes.With the increase of distance, the volume fraction on each section keeps constant.Illustrate aerosol
It can be achieved with being thoroughly mixed in very short distance with the diluent gas entered from tonifying Qi end.
In the embodiment, silica gel is filled with drier 103；Electrostatic charge neutralization 104 is aerosol electrostatic averager.Atomization
The single dispersing solid aerosol particle for the generation that generator is produced, each particle is surrounded by 5 hydrones, causes the aggregation of particle
And adhered on tube wall, therefore using the drier 103 filled with silica gel, can effectively remove moisture removal.And pass through gas knot mistake
After drier 103, drying effect can reach 99.5%, and monodisperse aerosol is dried very much, and the particle used in experiment
1.5 μm~4.5 μm of footpath scope, grain diameter is smaller, easily produces electrostatic, and electrically charged single dispersing solid aerosol particle can be inhaled
It is attached on tube wall, causes damage, influence detection aerosol particle number concentration value, and aerosol electrostatic averager can handle solid
Body or liquid aersol, particle size range are 0.1 μm~150 μm, and its principle destaticed is：Aerosol enters in aerosol electrostatic
In the mixing chamber of device, after being sufficiently mixed with the electrically charged clean gas that enters from the first tonifying Qi pipeline 117, particle is eliminated attached
The electrostatic.
In the embodiment, stage high-effective filter 115 is HEPA filters.
In the embodiment, the first valve 108, the second valve 109, the 3rd valve 110 and the 4th valve 111 are electromagnetism
Valve；5th valve 119, the 6th valve 120 and the 7th valve are magnetic valve, and magnetic valve is electrically connected with the controller.By using
Magnetic valve, influence of the human factor to time of measuring can be reduced as far as possible.
In the embodiment, require that the source of the gas after processing should not be containing more than 0.3 μm particulate matter according to detection；Therefore, lead to
Cross the experiment of the source of the gas particle diameter distribution after the detection process of aerosol particle diameter spectrometer 106.Aerosol particle diameter spectrometer 106 is to use light scattering
Principle measures the typical instrument of aerosol particle sub-count, measures 0.3 μm -20 μm of particle size range.
Remove condensation aerosol generator 102, the output end of freeze drier 116 is directly connected to drier 103
Input, after electrostatic charge neutralization 104, mixing pipe 105, into aerosol particle diameter spectrometer 106.Gas is full of gas circuit, ventilation
Half an hour, the residual particles attached in tube wall are removed, particle counting in now source of the gas is measured using aerosol particle diameter spectrometer 106
Concentration.Test result is as shown in table 1.
Table 1 is more than 0.3 μm particle concentration in clean gas source
| Pendulous frequency | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| More than 0.3 μm particle concentration | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
As can be seen from Table 1, filtered clean gas meets EPA and environmental protection standard in China and source of the gas particulate matter is contained
The requirement of amount.
In the embodiment, in the cutting characteristic detection process of PM2.5 cutters, Polystyrene suspension, i.e. standard
Grain suspension, is dispersed in ultra-pure water, so containing firstly the need of particulate matter in ultra-pure water is tested using aerosol particle diameter spectrometer 106
Amount, to verify the particulate matter in ultra-pure water with the presence or absence of influence experiment.
20mL ultra-pure waters are only added in condensation aerosol generator 102, dry clean gas are then passed to, through overdrying
After dry device 103, electrostatic charge neutralization 104, mixing pipe 105, into aerosol particle diameter spectrometer 106.The result such as institute of table 2 that test is 8 times
Show.
Table 2 is a particulate count range estimation examination (test volume 15cm in ultra-pure water3)
| Number of times | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Total particulate matter number | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 |
As can be seen from Table 2, the particulate matter number contained in ultra-pure water does not almost have, relative to the polystyrene of high concentration
Aerosol number can be ignored.Ultra-pure water can as the suspension of condensation aerosol generator 102 decentralized medium.
The volume flow of atomizing generator is controlled by the size for the pressure for controlling the gas in air accumulator 114, through surveying
Corresponding volume flow is 2lpm and 20lpm when examination obtains pressure between 0.5psi and 20psi.In this flow rate zone, pin
The standard particle of fixed volume is added to different-grain diameter, 1.5/cm can be reached by being detected through aerosol particle diameter spectrometer 1063,
Meet requirements of the EPA to detection aerosol concentration.
Embodiment 2
Shown in Figure 4, the embodiment of the present invention two provides the PM2.5 cutter cuts described in a kind of use embodiment one
The detection method of characteristic detection device, the detection method comprises the following steps：
Step 200, ultra-pure water and standard particle supernatant liquid are added into condensation aerosol generator 102, to produce single dispersing
Solid aerosol particle, wherein, the standard particle containing a variety of different-grain diameters in standard particle supernatant liquid, and a variety of different-grain diameters
The content of standard particle is definite value；
Specifically, in the embodiment, 8 kinds of equivalent aerodynamic particle size ranges of the prior art are used for (1.5-
μm 4.0) standard particle.The content of the standard particle of every kind of different-grain diameter is definite value.
Step 201, the first valve 108 and the 3rd valve 110 are opened, is closed after the second valve 109 and the 4th valve 111,
Read the aerosol particle number concentration value that aerosol particle diameter spectrometer 106 is measured；
Step 202, the second valve 109 and the 4th valve 111 are opened, is closed after the first valve 108 and the 3rd valve 110,
Read the aerosol particle number concentration value that aerosol particle diameter spectrometer 106 is measured；
Step 203, finally, according to the aerosol particle number concentration value measured under two states, analysis draws PM2.5
Whether cutter cuts characteristic meets the requirements.
Specifically, by aerosol particle number concentration under alternately measurement two states, different aerodynamics are obtained
The corresponding different arresting efficiency of particle of equivalent diameter；Then with a diameter of abscissa of equivalent aerodynamic, to trap effect
Rate is ordinate, sets up rectangular coordinate system, and the cutting characteristic song for obtaining PM2.5 cutters is fitted using TableCurve2D softwares
Line, and by analyzing the D50 and geometric standard deviation of cutting characteristic curve, judge whether the cutting performance of PM2.5 cutters accords with
Relevant criterion requirement is closed, wherein, D50 represents cutter to when the arresting efficiency of particulate matter is 50%, corresponding Particulate Air
Dynamics equivalent diameter, unit for μm.
Embodiment 3
Using above-mentioned PM2.5 cutter cuts characteristic detection devices, first by particle diameter different standard particles (polyphenyl second
Alkene particle) it is atomized respectively as single dispersing solid aerosol.By drying, destatic, mixed mixing in-line dilution, reach stabilization
State.Then, the PM2.5 cutters chosen are added in gas circuit, PM2.5 is alternately determined by real-time aerosol particle diameter spectrometer and is cut
Cutter upstream and the aerosol particle number in PM2.5 cutters downstream, remember N respectively1iAnd N2i.Until the atomization list of different-grain diameter
Disperse solid aerosol particle, which is completed, obtains N1ijAnd N2ij.Repeat three times, be calculated as follows and can obtain not
With the cutting efficiency of size grade scale particle：
In formula：The aerosol particle diameter point of i ... ... generations (different-grain diameter number, i is positive integer)；
The number of times of each particle diameter point measurements of j ... ... (j is positive integer)；
N1ij... the solid-state monodisperse particles thing concentration (number concentration value) of PM2.5 cutters upstream；
N2ij... the solid-state monodisperse particles thing concentration (number concentration value) in PM2.5 cutters downstream；
ηij... ... the arresting efficiency of each particle diameter point single measurement；
Calculate the cutting efficiency for obtaining different-grain diameter point respectively by formula (1)；
The average cutting efficiency of each particle diameter point is calculated as follows：
In formula：... ... ... ... the average cutting efficiency of each particle diameter point.
Again using resulting average cutting efficiency numerical value as ordinate, its corresponding standard particle particle diameter is sat as horizontal
Mark, fits corresponding cutting efficiency standard feature matched curve.Thus cutting efficiency standard feature matched curve, you can counter to push away
Obtain corresponding particle size values under the conditions of related cutting efficiency.
Pass through be fitted cutting efficiency standard feature matched curve and can be seen that (as shown in table 3), with the increasing of particle diameter
Greatly, PM2.5 cutting efficiency is gradually being reduced.Because grain diameter is bigger, inertia is also bigger, during air motion
It is easier to impinge upon on entrapment plate or is trapped within settling pit and deposits；, will be easily with air motion and particle diameter is smaller
Pass through.
Cutting efficiency under the conditions of the different-grain diameter of table 3
Further the cutting efficiency standard feature fit curve equation according to obtained by above-mentioned fitting experimental data is：
In formula, a=99.418；B=-98.304；C=2.493；D=0.268；E=2.513.It can be seen that this cutting effect
Rate standard feature fit curve equation is excessively complicated, the method analyzed using conventional regression, directly can't effectively evaluate
Analyze its related uncertainty.
PM2.5 cutters performance quality will be evaluated by investigating D50 uncertainty, i.e., cutting efficiency is 50% when institute
The uncertainty of corresponding diameter of particle.By carrying out observation analysis (such as Fig. 5 institutes to the matched curve of cutting efficiency standard feature
Show), it is found that the linear character of cutting efficiency this section of curve (accounting for most of in the middle of whole characteristic curve) between 10%-90% is bright
It is aobvious.And toward contraction at its focus point, linear character is more obvious.And D50 points are exactly the focus point of indicatrix.With
Centered on D50, several experimental points of extension, make corresponding linear curve up and down, and the straight line is evaluated by linear regression analysis
Uncertainty, and then determine key point D50 uncertainty.
Corresponding experimental point, i.e., the particulate corresponding to different cutting efficiencies are marked in cutting efficiency standard feature matched curve
Particle diameter, as shown in Figure 6.Centered on intermediate point (D50), two ends extension curve obtained linear character is obvious, so taking centre five
Individual experimental point is parameter (underscore part in table 3), least square method of sampling, and dependent linearity curvilinear equation is obtained as linearity curve
For：
Y=288.436-96.054x (4)
The coefficient correlation of gained linearity curve is 0.993, illustrates that linear character is good.(the cutting efficiency as y0=50
It is (2.482,50) 50%) to bring equation (4) into obtain x0=2.482, i.e. D50 coordinates, is also the focus point of whole linearity curve.
And in the investigation of linearity curve uncertainty, be more proximate at focus point, the precision of data uncertainty is also higher.So,
, can effective analyzing evaluation D50 uncertainty on the basis of linearity curve after linear regression.
Relevant experimental data in table 3 is substituted into be fitted linearity curve equation (4) first, the standard deviation returned is calculated
Poor estimate s：
In above formula, yiFor the corresponding cutting efficiency value of various criterion grain diameter；For obtained from linearity curve and xi
Corresponding yiCalculated value；N is testing time.
Corresponding particle diameter x when cutting efficiency is 50% is calculated again0Standard deviation estimate s (x0)：
In above formula,For the average value for whole x values used in linear curve；It is the average value of whole y values；y0
It is 50% to represent cutting efficiency；B is the slope of linearity curve；M is parallel testing number of times；
As cutting efficiency y0When=50%, substitute into linearity curve equation (4) and understand correspondence diameter of particle x0=2.482 μm, its
Expanded uncertainty be expressed as U (50).Confidence level p=95% (level of significance α=0.05) is chosen, t distribution tables are looked into, freely
V=n-2 is spent, t is obtained95(13)=1.771.So, D50Expanded uncertainty U95(50)=t95(13)×s(x0)=1.771 ×
0.02469=0.012133006 μm.I.e.：D50=(2.482 ± 0.012) μm.
Further by Fig. 2 linearity curves draw respectively PM2.5 cutter cuts efficiency be 16%, 50% with 84% when it is corresponding
Mass aerodynamic diameter be respectively：D16=2.828 μm and D84=2.122 μm.According to U.S. EPA relevant regulations, cutting
Characteristic geometric standard deviation (GSD) can be calculated as：
According to U.S. EPA and China environmental protection regulation《HJ618-2011 surrounding airs PM10With PM2.5 measure weight
Method》It is required that：D50=(2.5 ± 0.2) μm, geometric standard deviation GSD=1.2 ± 0.1.To sum up discussion result can be seen that this problem
Gained D50=(2.482 ± 0.057) μm, GSD=1.154 is satisfied by U.S. EPA and China environmental protection laws and regulations requirement.
The present invention is realized good and bad to PM2.5 cutter cuts characteristic by D50 analyzing and evaluating uncertainties
Evaluation.The method that emphasis takes section to be fitted is taken during D50 analyzing and evaluating uncertainties of the present invention, with whole cutting efficiency mark
Centered on the focus point of quasi- property fitting curve, limited experimentation point is respectively taken up and down, and obtained song is fitted to taken serial experiment point
Line is linearly good.Further by linear regression processing, linearity curve is obtained, linear character is protruded, coefficient correlation is close to 1.
Illustrate that the method that effectively can take section linear regression analysis using emphasis carries out analyzing evaluation to D50 uncertainty.The present invention
Method disclosure satisfy that the magnitude tracing demand in China PM2.5 cutter detection process, and can be provided for atmosphere environment supervision can
The technological service leaned on.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that various embodiments above is only used
To illustrate technical scheme, rather than its limitations；It will be understood by those within the art that：Without departing substantially from this hair
In the case of bright spirit and scope, the technical scheme described in foregoing embodiments can be modified, or to wherein
Some or all of technical characteristic carries out equivalent substitution；And these modifications or replacement, do not make the essence of appropriate technical solution
Depart from the scope of various embodiments of the present invention technical scheme；It is, therefore, intended that including belonging to the present invention in the following claims
In the range of all these substitutions and modifications.
Claims (10)
1. a kind of assay method of PM2.5 cutters D50 uncertainties, it is characterised in that use PM2.5 cutter cuts characteristics
Detection means carries out measuring and calculation to selected PM2.5 cutters to the average cutting efficiency of different-grain diameter standard particle, and
It is fitted cutting efficiency standard feature matched curve；
The method for taking emphasis to take section to be fitted, centered on the focus point of whole cutting efficiency standard feature matched curve, in institute
State the front and rear of focus point and take multiple experimental points respectively, taken each experimental point is fitted and obtains linearity curve, returned by straight line
Return analysis to determine the uncertainty of gained linearity curve, and then determine D50 uncertainty.
2. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that by such as
Lower formula calculates the cutting efficiency that can obtain different-grain diameter standard particle：
<mrow>
<msub>
<mi>&eta;</mi>
<mrow>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>N</mi>
<mrow>
<mn>2</mn>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
<msub>
<mi>N</mi>
<mrow>
<mn>1</mn>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mi>%</mi>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
In formula：The aerosol particle diameter point of i ... ... generations；
The number of times of each particle diameter point measurements of j ... ...；
N1ij... the solid-state monodisperse particles thing concentration of PM2.5 cutters upstream；
N2ij... the solid-state monodisperse particles thing concentration in PM2.5 cutters downstream；
ηij... ... the arresting efficiency of each particle diameter point single measurement；
Calculate the cutting efficiency for obtaining different-grain diameter point respectively by formula (1)；
The average cutting efficiency of each particle diameter point is calculated as follows：
<mrow>
<msub>
<mover>
<mi>&eta;</mi>
<mo>&OverBar;</mo>
</mover>
<mi>i</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mn>3</mn>
</munderover>
<msub>
<mi>&eta;</mi>
<mrow>
<mi>i</mi>
<mi>j</mi>
</mrow>
</msub>
</mrow>
<mn>3</mn>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mi>%</mi>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
In formula：... ... ... ... the average cutting efficiency of each particle diameter point.
3. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that described
The equation of cutting efficiency standard feature matched curve is：
<mrow>
<mi>y</mi>
<mo>=</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
<mrow>
<mo>&lsqb;</mo>
<mrow>
<mn>1</mn>
<mo>-</mo>
<msup>
<mrow>
<mo>&lsqb;</mo>
<mrow>
<mn>1</mn>
<mo>+</mo>
<mi>exp</mi>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>d</mi>
<mi> </mi>
<mi>ln</mi>
<mrow>
<mo>(</mo>
<mrow>
<msup>
<mn>2</mn>
<mfrac>
<mn>1</mn>
<mi>e</mi>
</mfrac>
</msup>
<mo>-</mo>
<mn>1</mn>
</mrow>
<mo>)</mo>
</mrow>
<mo>-</mo>
<mi>c</mi>
</mrow>
<mo>)</mo>
</mrow>
<mi>d</mi>
</mfrac>
<mo>)</mo>
</mrow>
</mrow>
<mo>&rsqb;</mo>
</mrow>
<mrow>
<mo>-</mo>
<mi>e</mi>
</mrow>
</msup>
</mrow>
<mo>&rsqb;</mo>
</mrow>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
Wherein, a, b, c, d and e value are directly determined by fitting.
4. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that cutting
It is to take the experimental point between 10%-90% to cut in efficiency standard property fitting curve cutting efficiency.
5. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that described
The equation of linearity curve is：
Y=ax+b；
Wherein, a and b value is directly determined by fitting.
6. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that described
The uncertainty of linearity curve includes obtained by being determined as linear regression analysis：
Standard particle particle diameter and corresponding average cutting efficiency are substituted into be fitted linearity curve equation, the mark returned is calculated
Quasi- estimation of deviation value s：
<mrow>
<mi>s</mi>
<mo>=</mo>
<msqrt>
<mrow>
<mfrac>
<mn>1</mn>
<mrow>
<mi>n</mi>
<mo>-</mo>
<mn>2</mn>
</mrow>
</mfrac>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<msub>
<mi>y</mi>
<mi>i</mi>
</msub>
<mo>-</mo>
<msub>
<mover>
<mi>y</mi>
<mo>^</mo>
</mover>
<mi>i</mi>
</msub>
</mrow>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
<mo>;</mo>
</mrow>
In above formula, yiFor the corresponding cutting efficiency value of various criterion grain diameter；For obtained from linearity curve and xiCorrespondence
YiCalculated value；N is testing time.
7. a kind of assay method of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that and then
Determine D50 uncertainty
Corresponding particle diameter x when cutting efficiency is 50% is calculated again0Standard deviation estimate s (x0)：
<mrow>
<mi>s</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfrac>
<mi>s</mi>
<mi>b</mi>
</mfrac>
<msqrt>
<mrow>
<mfrac>
<mn>1</mn>
<mi>m</mi>
</mfrac>
<mo>+</mo>
<mfrac>
<mn>1</mn>
<mi>n</mi>
</mfrac>
<mo>+</mo>
<mfrac>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<msub>
<mover>
<mi>y</mi>
<mo>&OverBar;</mo>
</mover>
<mn>0</mn>
</msub>
<mo>-</mo>
<mover>
<mi>y</mi>
<mo>&OverBar;</mo>
</mover>
</mrow>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mrow>
<msup>
<mi>b</mi>
<mn>2</mn>
</msup>
<munderover>
<mi>&Sigma;</mi>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<msub>
<mi>x</mi>
<mi>i</mi>
</msub>
<mo>-</mo>
<mover>
<mi>x</mi>
<mo>&OverBar;</mo>
</mover>
</mrow>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
</msqrt>
<mo>;</mo>
</mrow>
In above formula,For the average value for whole x values used in linear curve；It is the average value of whole y values；y0Represent
Cutting efficiency is 50%；B is the slope of linearity curve；M is parallel testing number of times；
Afterwards, confidence level is chosen, t distribution tables is looked into, determines the free degree, to D50Expanded uncertainty calculated.
8. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 1, it is characterised in that adopted
PM2.5 cutter cuts characteristic detection device includes compressed air source unit, condensation aerosol generator, drier, electrostatic and neutralized
Device, mixing pipe, aerosol particle diameter spectrometer, aspiration pump, the first valve, the second valve, the 3rd valve and the 4th valve；
The output end of the compressed air source unit is connected with the input of the condensation aerosol generator, and the atomization gas is molten to be occurred
The output end of device is connected with the input of the drier, the output end of the drier and the input of the electrostatic charge neutralization
End is connected, and the output end of the electrostatic charge neutralization is connected with the input of the mixing pipe；
It is described mix pipe output end be connected with the input of first valve, the output end of first valve with it is described
Aerosol particle diameter spectrometer is connected；
Input of the output end for mixing pipe also with PM2.5 cutters to be detected is connected, the PM2.5 cuttings to be detected
The output end of device is connected with the input of second valve, the output end of second valve and the aerosol Size
Instrument is connected；
Input of the input of first valve also with the 3rd valve is connected, the output end of the 3rd valve with
The input of the aspiration pump is connected；
Input of the input of second valve also with the 4th valve is connected, the output end of the 4th valve with
The input of the aspiration pump is connected.
9. the assay method of a kind of PM2.5 cutters D50 uncertainties according to claim 8, it is characterised in that use
The method that the PM2.5 cutter cuts characteristic detection device is detected, comprises the following steps：
Ultra-pure water and standard particle suspension are added into the condensation aerosol generator, to produce single dispersing solid aerosol
Particle, wherein, the standard particle of a variety of different-grain diameters, and the standard of a variety of different-grain diameters are contained in the standard particle supernatant liquid
The content of grain is definite value；
First valve and the 3rd valve are opened, is closed after second valve and the 4th valve, is read described
The aerosol particle number concentration value that aerosol particle diameter spectrometer measurement is measured；
Second valve and the 4th valve are opened, is closed after first valve and the 3rd valve, is read described
The aerosol particle number concentration value that aerosol particle diameter spectrometer measurement is measured.
10. using a kind of assay method of PM2.5 cutters D50 uncertainties described in claim 1-9 any claims
Measurement system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016111639272 | 2016-12-16 | ||
| CN201611163927.2A CN106525679A (en) | 2016-12-16 | 2016-12-16 | Method and system for measuring D50 uncertainty of PM2.5 cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107192648A true CN107192648A (en) | 2017-09-22 |
| CN107192648B CN107192648B (en) | 2020-02-14 |
Family
ID=58339915
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611163927.2A Withdrawn CN106525679A (en) | 2016-12-16 | 2016-12-16 | Method and system for measuring D50 uncertainty of PM2.5 cutter |
| CN201710421099.6A Pending CN107192644A (en) | 2016-12-16 | 2017-06-06 | PM2.5 cutter cuts characteristic detection device and method |
| CN201710416703.6A Active CN107192648B (en) | 2016-12-16 | 2017-06-06 | Method and system for measuring uncertainty of D50 of PM2.5 cutter |
| CN201720651780.5U Active CN206740587U (en) | 2016-12-16 | 2017-06-06 | PM2.5 cutter cuts characteristic detection devices |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611163927.2A Withdrawn CN106525679A (en) | 2016-12-16 | 2016-12-16 | Method and system for measuring D50 uncertainty of PM2.5 cutter |
| CN201710421099.6A Pending CN107192644A (en) | 2016-12-16 | 2017-06-06 | PM2.5 cutter cuts characteristic detection device and method |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720651780.5U Active CN206740587U (en) | 2016-12-16 | 2017-06-06 | PM2.5 cutter cuts characteristic detection devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN106525679A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525679A (en) * | 2016-12-16 | 2017-03-22 | 中国计量科学研究院 | Method and system for measuring D50 uncertainty of PM2.5 cutter |
| CN107271345B (en) * | 2017-06-15 | 2019-07-19 | 中国食品药品检定研究院 | Two method combined calibrating oxygen transit dose standard films of one kind and preparation method thereof |
| CN107421863A (en) * | 2017-09-25 | 2017-12-01 | 北京航空航天大学 | It is a kind of to combine the PM that monodisperse aerosol occurs1Cutting head Performance Test System |
| CN108169101B (en) * | 2018-01-18 | 2023-12-19 | 广州纤维产品检测研究院 | Anti-haze window screening filtering effect testing device and testing method |
| CN108499382A (en) * | 2018-04-24 | 2018-09-07 | 北京市计量检测科学研究院 | A kind of dust generating system and a kind of dust instrument calibration method |
| CN111812002A (en) * | 2020-06-29 | 2020-10-23 | 上海交通大学 | Small flow aerosol measuring method |
| CN111982784A (en) * | 2020-08-28 | 2020-11-24 | 中国环境监测总站 | PM2.5 cutterbar characteristic calibrating device |
| CN112229772A (en) * | 2020-09-04 | 2021-01-15 | 中国原子能科学研究院 | Radioactive aerosol source preparation system |
| CN111965083A (en) * | 2020-09-17 | 2020-11-20 | 青岛市计量技术研究院 | Particulate matter calibration system |
| CN113310856B (en) * | 2021-05-26 | 2022-08-26 | 常熟理工学院 | Particle generation method and device of heat flow generator for thermal vibration test |
| CN113635383B (en) * | 2021-07-02 | 2022-09-06 | 北京九州鹏跃科技有限公司 | Aerosol cutter |
| CN113457479B (en) * | 2021-07-22 | 2022-09-23 | 上海交通大学 | Dust aerosol generating system with constant and stable quantitative concentration |
| CN114486440B (en) * | 2022-01-27 | 2023-06-20 | 山东大学 | Particulate matter mixing system and detecting instrument calibration method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525679A (en) * | 2016-12-16 | 2017-03-22 | 中国计量科学研究院 | Method and system for measuring D50 uncertainty of PM2.5 cutter |
-
2016
- 2016-12-16 CN CN201611163927.2A patent/CN106525679A/en not_active Withdrawn
-
2017
- 2017-06-06 CN CN201710421099.6A patent/CN107192644A/en active Pending
- 2017-06-06 CN CN201710416703.6A patent/CN107192648B/en active Active
- 2017-06-06 CN CN201720651780.5U patent/CN206740587U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107192644A (en) | 2017-09-22 |
| CN206740587U (en) | 2017-12-12 |
| CN106525679A (en) | 2017-03-22 |
| CN107192648B (en) | 2020-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107192648A (en) | The assay method and system of PM2.5 cutter D50 uncertainties | |
| Wu et al. | Particle hygroscopicity and its link to chemical composition in the urban atmosphere of Beijing, China, during summertime | |
| Hanley et al. | Fractional aerosol filtration efficiency of in‐duct ventilation air cleaners | |
| Hapidin et al. | Aerosol chamber characterization for commercial particulate matter (PM) sensor evaluation | |
| CN106769728A (en) | PM2.5 quality and concentration monitor calibrating installations | |
| Stabile et al. | Ultrafine particle generation through atomization technique: the influence of the solution | |
| CN113063897B (en) | Air pollutant tracing method and device | |
| Buonanno et al. | Metrological performances of a diffusion charger particle counter for personal monitoring | |
| CN102147350A (en) | Method and device for fast detection of aerosol particle concentration and size distribution | |
| CN206489036U (en) | PM2.5 quality and concentration monitor calibrating installations | |
| CN107179289B (en) | Uncertainty analysis method based on gas concentration lwevel in infrared spectroscopic determination industrial smoke | |
| Chen et al. | Use of Nuclepore filters for ambient and workplace nanoparticle exposure assessment—Spherical particles | |
| CN106769729A (en) | PM2.5 cutter cuts characteristic detection device and method | |
| Du et al. | Development of a static test apparatus for evaluating the performance of three PM2. 5 separators commonly used in China | |
| Kumsanlas et al. | A cascade air sampler with multi-nozzle inertial filters for PM0. 1 | |
| Zinky | A new tool for air pollution control: The aerosol particle counter | |
| Fierz et al. | Miniature nanoparticle sensors for exposure measurement and TEM sampling | |
| CN209727703U (en) | A kind of naturally radioactive aerosol coagulation simultaneously eliminates experimental system | |
| CN107085079A (en) | A kind of Artificial Olfactory device and organic pollution control device | |
| CN107271236B (en) | Core-shell type aerosol generating system and application thereof in preparation of core-shell type aerosol | |
| CN104990770A (en) | Stationary source sampling and diluting system | |
| CN204807424U (en) | Dust calibration system | |
| KR101462949B1 (en) | Impactor Performance Evaluation System With Mixing Unit | |
| Morawska | Environmental aerosol physics | |
| CN206177601U (en) | Wet -type electric demister's capability test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |