CN106769729A - PM2.5 cutter cuts characteristic detection device and method - Google Patents
PM2.5 cutter cuts characteristic detection device and method Download PDFInfo
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- CN106769729A CN106769729A CN201611243246.7A CN201611243246A CN106769729A CN 106769729 A CN106769729 A CN 106769729A CN 201611243246 A CN201611243246 A CN 201611243246A CN 106769729 A CN106769729 A CN 106769729A
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- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 78
- 239000000443 aerosol Substances 0.000 claims abstract description 67
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 230000005591 charge neutralization Effects 0.000 claims abstract description 21
- 238000009833 condensation Methods 0.000 claims abstract description 19
- 230000005494 condensation Effects 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000000889 atomisation Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 14
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 9
- 239000012498 ultrapure water Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- 239000008275 solid aerosol Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 239000013618 particulate matter Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005250 beta ray Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000892 gravimetry Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
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- 239000003643 water by type Substances 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
- G01N15/06—Investigating concentration of particle suspensions
-
- G01N15/075—
Abstract
The present invention relates to air quality monitoring technical field, more particularly, to a kind of PM2.5 cutter cuts characteristic detection device and method, the output end of the compressed air source unit of the detection means is connected with the input of condensation aerosol generator, the output end of the molten generator of atomization gas is connected with the input of drier, the output end of drier is connected with the input of electrostatic charge neutralization, and the output end of electrostatic charge neutralization is connected with the input for mixing pipe；The output end for mixing pipe is connected with the input of the first valve, and the output end of the first valve is connected with aerosol particle diameter spectrometer；Mix input of the output end of pipe also with PM2.5 cutters to be detected to be connected, the output end of PM2.5 cutters to be detected is connected with the input of the second valve, and the output end of the second valve is connected with aerosol particle diameter spectrometer.The present invention has Detection results good, efficient and convenient.
Description
Technical field
The present invention relates to air quality monitoring technical field, more particularly, to a kind of PM2.5 cutter cuts Characteristics Detection
Device and method.
Background technology
PM2.5 refers to particulate matter of the aerodynamics equivalent diameter less than or equal to 2.5 μm in air, can also referred to as enter lung
Particulate matter.PM2.5 particle diameters are small, and residence time rich in substantial amounts of poisonous and harmful substances and in an atmosphere is long, fed distance is remote,
Influence thus to health and atmosphere quality is bigger.Fine particle of the particle diameter below 2.5 μm, is difficult to be blocked,
Bronchus can be directly entered after being inhaled into human body, the gas exchanges of lung are disturbed, initiation includes asthma, bronchitis and angiocarpy
The disease of the aspects such as disease.At present, PM2.5 particulate matters are the primary pollutants of China's air, and PM2.5 monitorings and effectively improvement are
The target of Ministry of Environmental Protection's door and national government.
Environmental Protection Department has promulgated HJ618-2011 within 2011《The bioassay standard of surrounding air PM10 and PM2.5》, it is stipulated that
Instrument for the monitoring of PM2.5 particle concentrations is particle sampler and particulate matter direct-reading instrument, and craft can be divided into by its principle
Analysis method and automatic analysis method (contain：Micro oscillating balance (TEOM) method, beta-ray measurement method, light-scattering measurement).
Either gravimetric method, oscillating balance method, β ray methods or light-scattering measurement, PM2.5 measurement of concetrations pass through
Particulate separation of the PM2.5 cutters by aerodynamics equivalent diameter in Atmospheric particulates less than or equal to 2.5 μm out, is received
Then collection measures analysis on filter membrane；Wherein, PM2.5 cutters refer to can be straight by aerodynamics in Atmospheric particulates
Particulate separation of the footpath less than or equal to 2.5 μm device out.It can thus be seen that the cutting performance of PM2.5 cutters is straight
Connect the accuracy of influence PM2.5 monitors, it is therefore desirable to which the cutting characteristic to PM2.5 cutters is regularly detected.
For the detection of the cutting characteristic of PM2.5 cutters, American National Environmental Protection Agency (EPA) standard《40CFR Part53,
Subpart F》, China state environment protecting standard HJ618-2011《The gravimetry method of surrounding air PM10 and PM2.5》With
Japanese JIS Z8851:2008《PM2.5 samplers technical standard in air》In, all standard recommanded practice material is (by different air
Dynamics equivalent diameter granules of polystyrene is constituted) cutting characteristic of PM2.5 cutters is detected, needed in detection process
Standard substance it is as shown in table 1.
The cutting characteristic of the detection PM2.5 cutters of table 1 standard substance requirement table
* being equivalent aerodynamic diameter is required to standard substance in table 1.
As can be seen from Table 1, the cutting characteristic detection of PM2.5 cutters needs to use 8 kinds of equivalent aerodynamic particle diameters
Scope is the standard substance of (1.5-4.0) μm.But, in the prior art, the cutting characteristic of PM2.5 cutters is detected
Effect is poor.
The content of the invention
It is existing to solve it is an object of the invention to provide a kind of PM2.5 cutter cuts characteristic detection device and method
Cutting characteristic present in technology to PM2.5 cutters carries out the poor technical problem of Detection results.
The invention provides a kind of PM2.5 cutter cuts characteristic detection device, including compressed air source unit, condensation aerosol hair
Raw device, drier, electrostatic charge neutralization, mixing pipe, aerosol particle diameter spectrometer, aspiration pump, the first valve, the second valve, the 3rd valve
Door 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 are 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 with
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.
Further, also including mass flow controller, the input of the aspiration pump and the mass flow controller
Output end be connected, the output end of the 4th valve, the output end of the 3rd valve respectively with the mass flow control
The input of device processed is connected.
Further, the compressed air source unit includes air compressor, air accumulator, stage high-effective filter and freeze-drying
Machine, wherein, the air compressor, the air accumulator, the stage high-effective filter and the freeze drier are sequentially communicated,
And the freeze drier is also connected with the condensation aerosol generator.
Further, baroceptor is installed on the air accumulator, the pressure for detecting gas in the air accumulator.
Further, also it is communicated with first between the input of the output end of the compressed air source unit and the electrostatic charge neutralization
Tonifying Qi pipeline.
Further, the input that the top for mixing pipe has inverted cone-shaped structure, the mixing pipe falls described in
The end of pyramidal structure.
Further, the second tonifying Qi pipeline is also communicated between the compressed air source unit and the mixing pipe,
Wherein, the output end of the compressed air source unit is connected with one end of the second tonifying Qi pipeline, second blowdown pipe
The other end in road is connected with the tonifying Qi end of the mixing pipe, and the tonifying Qi end extend into the conical surface of the inverted cone-shaped structure
Place, for making the gas from the second tonifying Qi pipeline outflow be flowed along the conical surface of the inverted cone-shaped structure.
Further, silica gel is filled with the drier；The electrostatic charge neutralization is aerosol electrostatic averager.
Further, the stage high-effective filter is HEPA filters.
Further, first valve, second valve, the 3rd valve and the 4th valve are electromagnetism
Valve.
Present invention also offers a kind of detection method using described PM2.5 cutter cuts characteristic detection devices, should
Detection method is comprised the following steps：
To ultra-pure water and standard particle suspension is added in the condensation aerosol generator, to produce single dispersing invented solid gas
Sol particle, wherein, in the standard particle supernatant liquid containing various different-grain diameters standard particle, and various different-grain diameters mark
The content of quasi- particle is definite value；
First valve and the 3rd valve are opened, after closing 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, after closing first valve and the 3rd valve, is read
The aerosol particle number concentration value that the aerosol particle diameter spectrometer measurement is measured.
Compared with prior art, beneficial effects of the present invention are：
In the PM2.5 cutter cuts characteristic detection device and method of present invention offer, compressed air source unit can provide cleaning
Air, it is the single dispersing solid aerosol of definite value that condensation aerosol generator can produce the content of various different-grain diameters
Grain, single dispersing solid aerosol particle can be dried by drier, and electrostatic charge neutralization can neutralize dried single dispersing
Solid aerosol particle, prevents electrically charged single dispersing solid aerosol granular absorption on tube wall, causes single dispersing invented solid gas
Sol particle loses, influence detection aerosol particle number concentration value；By molten first valve of gas, the second valve, the 3rd valve
The aerosol particle number concentration value measured under two states with the switching of the opening and closing of the 4th valve, realization, and pass through
Cross analysis and show whether PM2.5 cutter cuts characteristic meets the requirements, to sum up, the present invention can be to the cutting of PM2.5 cutters
Characteristic is effectively detected, and Detection results are good, efficient and convenient.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method 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 one is provided；
Fig. 2 is the structural representation of compressed air source unit in the embodiment of the present invention one；
Fig. 3 is the structural representation of mixing pipe in the embodiment of the present invention one；
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 two.
In figure：100- compressed air source units；102- condensation aerosol generators；103- driers；104- electrostatic charge neutralizations；105-
Mix 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；
The valves of 111- the 4th；112- mass flow controllers；113- air compressors；114- air accumulators；115- stage high-effective filters；
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；
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.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, 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
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Embodiment one
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 with and the input of condensation aerosol generator 102 between；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 input for mixing pipe 105 with the output end of device 104；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；Mix pipe 105 output end also with treat
Detect that the input of PM2.5 cutters is connected, the input of the output end of PM2.5 cutters to be detected and 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 the 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 input of the first valve 108 is connected with the tie point of the output end for mixing pipe 105 with the input of the 3rd valve 110；
Input of the input of the 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 company of the input of the second valve 109 and 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 the 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 to be connected with the input of stage high-effective filter 115, 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
Be compressed to air 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 into gaseous state, so as to reach dry purpose, wherein, freeze drier 116 treatment tolerance be 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 the scope in setting is controlled by baroceptor
It is interior, for follow-up process provides continual and steady source of the gas.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
After device receives the pressure information of baroceptor transmission, air compressor 113 is set to be 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 receiving the pressure information of baroceptor transmission, air compressor 113 is reworked, continue to manufacture dry clean gas
Body, so as to can guarantee that continually as follow-up process provides stabilization source of the gas.
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, the other end and the mixing pipe 105 of the second tonifying Qi pipeline 118
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
The gas of outflow flows along the conical surface of inverted cone-shaped structure 121.The input of the first valve 108, PM2.5 cutters to be detected it is defeated
Enter end to be connected with the output end for mixing pipe 105 by stream splitter 122.The 7th is provided with second tonifying Qi pipeline 118
Valve.
Tested by detecting, when the length for mixing pipe 105 is 100mm, mix the aerosol on the cross section of pipe 105
Volume fraction just no longer changes.With the increase of distance, the volume fraction on each section keeps constant.Illustrate aerosol
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 of 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 by 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, electrically charged single dispersing solid aerosol particle to inhale
It is attached on tube wall, causes damage, influence detection aerosol particle number concentration value, and aerosol electrostatic averager can process solid
Body or liquid aersol, particle size range are 0.1 μm~150 μm, and its principle for destaticing is：Aerosol enters in aerosol electrostatic
In the mixing chamber of device, after being sufficiently mixed with the electrically charged clean gas entered 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, can as far as possible reduce influence of the human factor to time of measuring.
In the embodiment, require that the source of the gas after treatment should not be containing more than 0.3 μm particulate matter according to detection；Therefore, lead to
The source of the gas particle diameter distribution experiment crossed 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, by after electrostatic charge neutralization 104, mixing pipe 105, into aerosol particle diameter spectrometer 106.Gas is full of gas circuit, ventilation
Half an hour, removal attaches residual particles in tube wall, and particle counting in now source of the gas is measured using aerosol particle diameter spectrometer 106
Concentration.Test result is as shown in table 2.
Table 2 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 2, filtered clean gas meet EPA and environmental protection standard in China and source of the gas particulate matter are 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
Measure to verify the particulate matter tested with the presence or absence of influence in ultra-pure water.
20mL ultra-pure waters are only added in condensation aerosol generator 102, dry clean gas is 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 3 that test is 8 times
Show.
Table 3 is particulate count range estimation examination (a test volume 15cm3) in ultra-pure water
| 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 3, the particulate matter number for containing in ultra-pure water does not almost have, relative to the polystyrene of high concentration
Aerosol number can be ignored.Ultra-pure water can be as the decentralized medium of the suspension of condensation aerosol generator 102.
The volume flow of atomizing generator is controlled by controlling the size of the pressure of 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, being detected through aerosol particle diameter spectrometer 106 can reach 1.5/cm3,
Meet EPA to detecting the requirement of aerosol concentration.
Embodiment two
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 is comprised the following steps：
Step 200, to ultra-pure water and standard particle supernatant liquid is added in condensation aerosol generator 102, to produce single dispersing
Solid aerosol particle, wherein, the standard particle containing various different-grain diameters in standard particle supernatant liquid, and various different-grain diameters
The content of standard particle is definite value；
Specifically, in the embodiment, it is (1.5- to use 8 kinds of equivalent aerodynamic particle size ranges of the prior art
μm 4.0) standard particle.The content of the standard particle of every kind of different-grain diameter is definite value.
Step 201, opens the first valve 108 and the 3rd valve 110, after closing 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, opens the second valve 109 and the 4th valve 111, after closing 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. 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.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.Although additionally, it will be appreciated by those of skill in the art that some embodiments described herein are implemented including other
Some included features are rather than further feature in example, but the combination of the feature of different embodiments means in the present invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment required for protection
It is one of any mode to use in any combination.
Claims (10)
1. a kind of PM2.5 cutter cuts characteristic detection device, it is characterised in that occur including compressed air source unit, condensation aerosol
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, the molten generation of atomization gas
The output end of device is connected with the input of the drier, the input of the output end of the drier and 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.
2. PM2.5 cutter cuts characteristic detection device according to claim 1, it is characterised in that also including quality stream
Amount controller, the input of the aspiration pump is connected with the output end of the mass flow controller, the 4th valve
The input of output end, the output end of the 3rd valve respectively with the mass flow controller is connected.
3. PM2.5 cutter cuts characteristic detection device according to claim 1, it is characterised in that the compressed air source unit
Including air compressor, air accumulator, stage high-effective filter and freeze drier, wherein, the air compressor, the gas storage
Tank, the stage high-effective filter and the freeze drier are sequentially communicated, and the freeze drier also with the atomization gas
Colloidal sol generator is connected.
4. PM2.5 cutter cuts characteristic detection device according to claim 3, it is characterised in that on the air accumulator
Baroceptor is installed, the pressure for detecting gas in the air accumulator.
5. PM2.5 cutter cuts characteristic detection device according to claim 1, it is characterised in that the compressed air source unit
Output end and the input of the electrostatic charge neutralization between be also communicated with the first tonifying Qi pipeline.
6. PM2.5 cutter cuts characteristic detection devices according to any one of claim 1-5, it is characterised in that institute
Stating the top of mixing pipe has inverted cone-shaped structure, and the input of the mixing pipe is located at the end of the inverted cone-shaped structure.
7. PM2.5 cutter cuts characteristic detection device according to claim 6, it is characterised in that the compressed air source unit
The second tonifying Qi pipeline is also communicated between the mixing pipe,
Wherein, the output end of the compressed air source unit is connected with one end of the second tonifying Qi pipeline, the second tonifying Qi pipeline
The other end is connected with the tonifying Qi end of the mixing pipe, and the tonifying Qi end is extend at the conical surface of the inverted cone-shaped structure, is used
Flowed along the conical surface of the inverted cone-shaped structure in the gas from the second tonifying Qi pipeline outflow is made.
8. PM2.5 cutter cuts characteristic detection device according to claim 1, it is characterised in that in the drier
Filled with silica gel；The electrostatic charge neutralization is aerosol electrostatic averager.
9. PM2.5 cutter cuts characteristic detection device according to claim 1, it is characterised in that first valve,
Second valve, the 3rd valve and the 4th valve are magnetic valve.
10. a kind of usage right requires the detection side of the PM2.5 cutter cuts characteristic detection devices any one of 1-9
Method, it is characterised in that the detection method is comprised the following steps：
To ultra-pure water and standard particle suspension is added in the condensation aerosol generator, to produce single dispersing solid aerosol
Particle, wherein, in the standard particle supernatant liquid containing various different-grain diameters standard particle, and various different-grain diameters standard
The content of grain is definite value；
First valve and the 3rd valve are opened, after closing 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, after closing first valve and the 3rd valve, is read described
The aerosol particle number concentration value that aerosol particle diameter spectrometer measurement is measured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611243246.7A CN106769729A (en) | 2016-12-28 | 2016-12-28 | PM2.5 cutter cuts characteristic detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243246.7A CN106769729A (en) | 2016-12-28 | 2016-12-28 | PM2.5 cutter cuts characteristic detection device and method |
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| CN106769729A true CN106769729A (en) | 2017-05-31 |
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| CN201611243246.7A Withdrawn CN106769729A (en) | 2016-12-28 | 2016-12-28 | PM2.5 cutter cuts characteristic detection device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107560986A (en) * | 2017-08-30 | 2018-01-09 | 合肥福瞳光电科技有限公司 | A kind of multichannel PM2.5 detection means |
| CN107990928A (en) * | 2017-11-22 | 2018-05-04 | 北京市计量检测科学研究院 | Detection method, system and the device of the physical efficiencies of flcating germ sampling head sampling |
| CN109827880A (en) * | 2019-03-20 | 2019-05-31 | 中国计量科学研究院 | Airborne particle counter calibrating installation and calibration method |
| CN112816381A (en) * | 2021-02-26 | 2021-05-18 | 中山大学 | Aerosol particulate matter detecting system |
| CN114486440A (en) * | 2022-01-27 | 2022-05-13 | 山东大学 | Particulate matter mixing system and detection instrument calibration method |
| CN112816381B (en) * | 2021-02-26 | 2024-04-26 | 中山大学 | Aerosol particulate matter detecting system |
-
2016
- 2016-12-28 CN CN201611243246.7A patent/CN106769729A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560986A (en) * | 2017-08-30 | 2018-01-09 | 合肥福瞳光电科技有限公司 | A kind of multichannel PM2.5 detection means |
| CN107990928A (en) * | 2017-11-22 | 2018-05-04 | 北京市计量检测科学研究院 | Detection method, system and the device of the physical efficiencies of flcating germ sampling head sampling |
| CN109827880A (en) * | 2019-03-20 | 2019-05-31 | 中国计量科学研究院 | Airborne particle counter calibrating installation and calibration method |
| CN109827880B (en) * | 2019-03-20 | 2021-08-31 | 中国计量科学研究院 | Dust particle counter calibration device and calibration method |
| CN112816381A (en) * | 2021-02-26 | 2021-05-18 | 中山大学 | Aerosol particulate matter detecting system |
| CN112816381B (en) * | 2021-02-26 | 2024-04-26 | 中山大学 | Aerosol particulate matter detecting system |
| CN114486440A (en) * | 2022-01-27 | 2022-05-13 | 山东大学 | Particulate matter mixing system and detection instrument calibration method |
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Application publication date: 20170531 |