CN205958415U - Device of particulate matter in grid fractional separation air based on particle diameter - Google Patents
Device of particulate matter in grid fractional separation air based on particle diameter Download PDFInfo
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- CN205958415U CN205958415U CN201620800624.6U CN201620800624U CN205958415U CN 205958415 U CN205958415 U CN 205958415U CN 201620800624 U CN201620800624 U CN 201620800624U CN 205958415 U CN205958415 U CN 205958415U
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- microtrabeculae
- particle diameter
- air
- particulate matter
- grid
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Abstract
The utility model discloses a device of particulate matter in grid fractional separation air based on particle diameter, including filtering systems, filtering systems's one end is connected with the intake pipe, there is clean air intake duct in intake pipe branch and awaits measuring air intake duct, filtering systems is inside to be provided with a plurality of grades of microtrabeculaes, every grade the microtrabeculae includes a plurality of microtrabeculaes that are listed as, every the microtrabeculae is whole to be the rounded rectangle shape, every grade the lower extreme is provided with the export between the microtrabeculae, the export below is provided with collection device, every adjacent two -stage a few font separation structures the microtrabeculae lower extreme is provided with, the cross section of microtrabeculae is rounded rectangle, per two set up with interval adjustable mode between the microtrabeculae. The utility model discloses a microtrabeculae adopts rounded rectangle, has reduced the particulate matter impactes the microtrabeculae in the motion process damage, improved the reliability of screening, and the cross sectional shape of microtrabeculae, size and adjacent interval is optional, and the microtrabeculae array is easily disposable large tracts of land processing also, and energy -conserving material -saving saves time.
Description
Technical field
This utility model is related to a kind of device of screening particulate in air, the specially size pair according to desirable particle size
Particulate matter carries out fractionated, makes the separation of particulate matter and analysis more accurate, be particularly well-suited to particulate in air is needed by
Grain size grading sampling aspect.
Background technology
The particulate matter (Particulate Matter, PM) of in the air refers to solid or the liquid particles shape thing of in the air
Matter.The diameter range of PM is 0.1um～200um.Diameter according to PM is it is however generally that PM can be divided into total suspended particles
(Total Suspended Particles, TSP), coarse granule (Coarse Particulate Matter, PM10) and thin
Grain (Fine Particulate Matter, PM2.5).Total suspended particles are less than the particulate matter of 100um for particle diameter；Coarse granule is
Particle diameter is less than the particulate matter of 10um.Fine grained is less than the particulate matter of 2.5um for particle diameter.Between various countries to the division of particulate matter slightly
Difference.The particulate matter main source of China is dust from land surface, coal combustion, locomotive emissions and other industrial activities and above-mentioned source
The secondary pollution that the original gas pollutant of discharge generate through Chemical Physics reaction in an atmosphere.In recent years, because of airborne particulate
The gray haze phenomenon that the sharp increase of thing concentration leads to takes place frequently in Chinese several big cities, high particle concentration give people to live cause bad
Affect to appear in the newspapers repeatly end.The harm that the particulate matter of high concentration brings is mainly at 2 aspects：Environmental destruction and health are damaged
Evil.In terms of ecological environment, substantial amounts of particulate matter falls to affecting the growth of plant on the leaf of plant, directly makes crop production reduction
The reduction of income；Granule lands with rain as the nuclei of condensation, changes the acid-base value of precipitation, changes diversity of organism and ground
Looks.There are some researches show that the air of high concentration particle thing even affects the reproductive system of animal, reduce the fertility rate of animal.In a large numberGranule andGranule sedimentation makes the speed that building is corroded accelerate, and shortens the life cycle of building.Due to visible
The wavelength of light is 0.36um～0.78um, and the therefore granule for 0.1um～1um for the particle diameter is strong to the scattering process of visible ray, high
The particulate matter of concentration makes visibility of air be greatly lowered.Therefore, there is huge traffic peace in the high city of particle concentration
Full hidden danger.Particle diameter is slow in 1um particles below thing sedimentation velocity, can retain in an atmosphere for a long time, can be defeated in air motion
Deliver to far part.Therefore, Particulate Pollution is not only deep, of long duration, and scope is wide.In terms of health, research
Even if showing that particle concentration is less than standard limited value, particulate matter also has detrimental effect, the particulate matter of high concentration to the health of human body
Undoubtedly will seriously damage health.Investigate and shown the insulting respiratory system of particulate matter, blood circulation, siberian crabapple
System, nervous system and reproductive system etc..Therefore, the particulate matter screening in the air based on particle diameter is to detailed concrete analysis particulate matter pair
The impact of health and environment is of great advantage.
At present, the main method being sieved the particulate matter of in the air based on particle diameter is had：(1) filter membrane weight method；(2) light scattering
Method；(3) β ray method；(4) micro concussion sedimentation balance method, etc..Above-mentioned screening result is more coarse, based on particle diameter simultaneously in the air
Particulate matter carry out the temporary nothing of method of multiple fractionation screening.
(1) filter membrane weight method (gravimetric method or manual method) passes through sampler with constant rate of speed extraction a certain amount of volume sky
Gas, the particulate matter of in the air is throttled on filter membrane, in conjunction with filter membrane weight before sampling after change and sampled air volume, meter
Calculate concentration.The method is national standard analysis method, its retention efficiency high to particulate matter, and measurement result accurately, is the most straight
Connect, reliable method.Whether accurately filter membrane weight method is to verify the result reference of other measuring methods.But when air-flow is long
Between when constantly passing through sampling membrane, the material that filter membrane collects can cause volatility and partly waves with the change of air-flow and temperature
The loss of volatile material, simultaneously some superfine little granules still can cause Lower result through filter membrane；On the contrary, other materials
May be adsorbed by filter membrane, cause result higher；(2) light scattering method is due in scattering of light in real process and particle concentration
Between relation affected by factors such as the chemical composition of particulate matter, form, proportions, therefore light scattering and particle concentration it
Between reduction formula whenever and wherever possible all become, for using light scattering principle instrument need constantly with standard method correct, therefore
This technology definitiveness is not high；(3) ultimate principle of β ray method is using the particulate matter being deposited on adaptation filter membrane, carbon-14 to be released
The change of the measure of the change airborne particulate amount of substance of the β ray attenuation amount put.Surrounding air is sucked by the cleaved device of sampling pump and adopts
Sample pipe, discharges after entering filter membrane, and particulate matter is deposited on strip quartz filter, when β ray passes through to deposit the filter of particulate matter
During film, Beta-ray intensity decays, by the tester of attenuation is calculated with the concentration of particulate matter.This method is based on 2
Individual it is assumed that the quartzy sampling membrane band of first instrument is homogeneous, it two is that the PM2.5 particle physicses characteristic collecting is homogeneous
(i.e. granular size is consistent, and particulate component is consistent, granule being evenly distributed on filter membrane), to β radiation attenuation rate phase
With.And above-mentioned 2 points under real world conditions often and be false, therefore determination data is generally acknowledged to there is also deviation, and this
Detection method is also very high in moist high-temperature area fault rate；(4) micro concussion sedimentation balance method mainly uses that conical component is micro to shake
Swing balance principle.Hollow conical pipe in equipment keeps the state of reciprocating vibration, and its frequency of oscillation is by with collected by filter membrane
The mass change of particulate matter and change.Obtain the quality of particulate matter by the change of measurement frequency, obtain sample in conjunction with sample volume
The concentration of product.The advantage of this technology is that relation is clear and definite, and shortcoming is that current technology cannot solve volatility and half after sample heating
The loss of volatile material, leads to measurement result to be considered low, thus distortion.
Above-mentioned 4 kinds of methods, in addition to above-mentioned described pluses and minuses, also have the particulate matter that they can not simultaneously in the air
Accurate multi-stage screening is carried out according to its particle diameter, this impacts to the detection of particulate matter and subsequent analysis.
Utility model content
The shortcoming all having for above-mentioned prior art, the purpose of this utility model is to propose a kind of grid based on particle diameter
The device of the particulate matter of fractionated in the air, so that the detection of particulate matter and analysis are more accurately and reliably.
The technical scheme that this utility model is adopted：
A kind of device of the grid fractionated particulate in air based on particle diameter, including screening system, described screening system
One end of system is connected with air inlet pipe, and there are clean air air inlet pipe and air intake duct to be measured, described screening in described air inlet pipe branch
Internal system is provided with some grades of microtrabeculaes, and every grade of described microtrabeculae includes some row microtrabeculaes, the generally fillet square of microtrabeculae described in each column
Shape shape, between every grade of described microtrabeculae, lower end is provided with outlet.
It is provided with collection device below described outlet.
Often microtrabeculae lower end described in adjacent two-stage is provided with a few font barrier structures.
The cross section of described microtrabeculae is round rectangle.
Arranged in the adjustable mode of spacing between every two described microtrabeculaes of row.
Spacing between described every grade of microtrabeculae is set in the way of successively decreasing successively from described inlet port to screening system end
Put.
Arranged in the uniform mode of spacing between two microtrabeculaes described in same column.
Compared with prior art, the beneficial effects of the utility model are：(1) material of this utility model screening system is permissible
Using multiple materials smooth and easy to process, such as polystyrene, polymethyl methacrylate (PMMA) etc..Processing mode can be adopted
Use micro-nano technology technology, such as Laser Processing, reaction ion deep etching, nano impression etc.；(2) microtrabeculae of the present utility model is using circle
Angular moment shape, reduces the breakage that particulate matter clashes into microtrabeculae in motor process, improves the reliability of screening；(3) this practicality is new
Type relies on ripe micro-nano technology technology, and the cross sectional shape of microtrabeculae, size and adjacent spacing have plurality of optional, and micro-pillar array is also easy
In the processing of disposable large area, time-saving energy-saving section material；(4) the multiple rows of microtrabeculae of every grade of employing of this utility model, improve classification can
By property, the microtrabeculae row sieving every grade of sum of series can adjust as the case may be；(5) this utility model air to be measured and cleaning are empty
Gas enters screening system by admission line, and enters collection device, wherein admission line and outlet pipe by outlet pipe
On be respectively mounted check valve, it is to avoid the refluence of gas.
Brief description
Fig. 1 is a kind of top view of the device of the grid fractionated particulate in air based on particle diameter of this utility model.
Fig. 2 is a kind of device of the grid fractionated particulate in air based on particle diameter of this utility model embodiment one
Schematic diagram.
Specific embodiment
Further illustrate the technical solution of the utility model with reference to specific embodiment.
As shown in figure 1, a kind of device of the grid fractionated particulate in air based on particle diameter, including screening system 3,
One end of described screening system 3 is connected with air inlet pipe 7, and described air inlet pipe branch has clean air air inlet pipe 2 and air to be measured to enter
Trachea 4, described screening system 3 is internally provided with some grades of microtrabeculaes, and every grade of described microtrabeculae includes some row microtrabeculaes 6, described in each column
Microtrabeculae 6 generally rounded rectangle shape, between every grade of described microtrabeculae 6, lower end is provided with outlet.
It is provided with collection device, often microtrabeculae 6 lower end described in adjacent two-stage is provided with several fonts and intercepts knot below described outlet
Structure, the cross section of described microtrabeculae 6 is round rectangle.
Spacing between described every grade of microtrabeculae is set in the way of successively decreasing successively from described inlet port to screening system 3 end
Put, arranged in the uniform mode of spacing between two microtrabeculaes 6 described in same column.
Embodiment one
As shown in Fig. 2 a kind of device of the grid fractionated particulate in air based on particle diameter, when specifically used,
Comprise the steps：
S1:Open check valve 1, clean air is passed through to screening system 3 to screening system 3 by clean air air inlet pipe 2
It is cleaned processing；
S2:Air to be detected is dried；
S3:Open check valve 1, be passed through from the entrance point of screening system 3 by air intake duct 4 to be measured a certain amount of described
Air to be detected, the various sizes of particulate matter of described in the air to be detected is stopped and landing before the microtrabeculae 6 of different spacing；
S4:Stop being passed through described air to be detected, and the described entrance point from described screening system 3 be passed through clean air,
To drive described gas flow forward to be detected；
S5:Exported from described screening system 3 lower end by collection device 8 and collect target particles.
In step S4, the time being continually fed into clean air is 3min, and the pressure of described clean air is 1 times of standard atmosphere
Pressure, is mainly completed using dynamic heat system when air to be measured is dried.
A kind of device of the grid fractionated particulate in air based on particle diameter, including screening system 3, described screening system
One end of system 3 is connected with air inlet pipe 7, and there are clean air air inlet pipe 2 and air intake duct to be measured 4 in described air inlet pipe 7 branch, described
Screening system 3 is internally provided with three-level microtrabeculae, and every grade of described microtrabeculae 6 includes three row microtrabeculaes 6, and described in each column, microtrabeculae 6 is generally round
Angle rectangular shape, between every grade of described microtrabeculae, lower end is provided with outlet.
It is provided with collection device 8, often microtrabeculae 6 lower end described in adjacent two-stage is provided with several fonts and intercepts knot below described outlet
Structure 7, the cross section of described microtrabeculae 6 is round rectangle.
Arranged in the adjustable mode of spacing between every two described microtrabeculaes 6 of row, the spacing between described every grade of microtrabeculae 6 is with from institute
State the mode that inlet port successively decreases successively to screening system 3 end to arrange, with spacing uniformly side between two microtrabeculaes 6 described in same column
Formula is arranged.
In the technical scheme of this specific embodiment, in screening system 3,1-3 arranges spacing d of microtrabeculae 61=10um, grain
The granule of footpath ＞ 10um stopped and landing and be sized out；The granule of particle diameter≤10um is in the work of clean air stream and inertia
Arrange microtrabeculae 6 with lower through 1-3.In the same manner, because of microtrabeculae 6 spacing d of 4-6 row2Microtrabeculae 6 spacing d of=2.5um and 7-9 row3=1um,
The particulate matter of particle diameter 2.5um-10um and particle diameter 1um-2.5um are stopped successively, landing and collect.Finally, 6 gusts of microtrabeculae can be passed through
The particulate matter being only particle diameter≤1um of row, therefore, the particulate matter of particle diameter≤1um is also by natural separation out；After certain time length,
Take off collection device 1-4, extract the particle swarm of different-grain diameter scope, then acquisition particulate matter is tested and analyzed.Collect dress
The particle size range putting collected particle swarm in 1-4 is followed successively by ＞ 10um, 2.5um-10um, 1um-2.5um and≤1um, in addition,
Often microtrabeculae lower end described in adjacent two-stage is provided with a few font barrier structures 7, is obscured with the particle swarm preventing different-grain diameter, more
Beneficial to collection.
This utility model has the advantage that：(1) prepare microtrabeculae 6 structure with different spacing d, different spacing is divided
From various sizes of granule.Spacing species is more, and separation series is more, and particulate matter is separated must be finer.Such as examples of implementation
Shown in one, particulate matter is carried out with 3 grades of separation.1-3 row, 4-6 row, 7-9 arrange microtrabeculae 6 spacing d be followed successively by 10um, 2.5um,
1.0um, the fore-and-aft clearance of microtrabeculae 6 is unified to be 20um.High 5um～the 20um of microtrabeculae, cross section is round rectangle, the long 20um of rectangle,
Rectangle width 5um～20um, radius of corner is wide 1/2.(2) a certain amount of pending air after drying is passed through screening system
In system 3, air velocity is fixed according to the situation of air.After stopping being passed through air to be checked, then it is passed through clean air and continues 3min-
5min, the pressure of pure air is 1 times of -1.5 times of normal atmosphere, and be passed through clean air is to make screening system in separation process
3 internal gas keep flow forward.In theory, all along tiltedly after the various sizes of particulate matter of pending in the air is stopped
Diversity is screened in corresponding collection device along inclined plane landing in the presence of the component in face.Particulate matter is considered as spherical, ignores
Viscous drag between particulate matter, additional tension stress etc..Additionally, microtrabeculae 6 can be adjacent using different section shape and sizes
Microtrabeculae 6 row of the spacing of two row's microtrabeculaes 6 and same split level adjusts also dependent on concrete condition.Between the different microtrabeculae 6 of setting
Away from d classification different with selection species, various sizes of particle swarm can be obtained.
At present, the main method being sieved the particulate matter of in the air based on particle diameter is had：(1) filter membrane weight method；(2) light scattering
Method；(3) β ray method；(4) micro concussion sedimentation balance method, etc..Above-mentioned screening result is more coarse, based on particle diameter simultaneously in the air
Particulate matter carry out the temporary nothing of method of multiple stage separation.
For a person skilled in the art, can technical scheme as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the guarantor that all should belong to this utility model claim
Within the scope of shield.
Claims (7)
1. a kind of device of the grid fractionated particulate in air based on particle diameter it is characterised in that：Including screening system, institute
The one end stating screening system is connected with air inlet pipe, and there are clean air air inlet pipe and air intake duct to be measured in described air inlet pipe branch,
Described screening system is internally provided with some grades of microtrabeculaes, and every grade of described microtrabeculae includes some row microtrabeculaes, and microtrabeculae described in each column is overall
For rounded rectangle shape, between every grade of described microtrabeculae, lower end is provided with outlet.
2. a kind of device of the grid fractionated particulate in air based on particle diameter as claimed in claim 1, its feature exists
In：It is provided with collection device below described outlet.
3. a kind of device of the grid fractionated particulate in air based on particle diameter as claimed in claim 1, its feature exists
In：Often microtrabeculae lower end described in adjacent two-stage is provided with a few font barrier structures.
4. a kind of device of the grid fractionated particulate in air based on particle diameter as claimed in claim 1, its feature exists
In：The cross section of described microtrabeculae is round rectangle.
5. the device of a kind of grid fractionated particulate in air based on particle diameter according to claim 1, its feature
It is：Arranged in the adjustable mode of spacing between every two described microtrabeculaes of row.
6. the device of a kind of grid fractionated particulate in air based on particle diameter according to claim 1, its feature
It is：Spacing between described every grade of microtrabeculae is arranged in the way of successively decreasing successively from described inlet port to screening system end.
7. the device of a kind of grid fractionated particulate in air based on particle diameter according to claim 1, its feature
It is：Arranged in the uniform mode of spacing between two microtrabeculaes described in same column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620800624.6U CN205958415U (en) | 2016-07-27 | 2016-07-27 | Device of particulate matter in grid fractional separation air based on particle diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620800624.6U CN205958415U (en) | 2016-07-27 | 2016-07-27 | Device of particulate matter in grid fractional separation air based on particle diameter |
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| Publication Number | Publication Date |
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| CN205958415U true CN205958415U (en) | 2017-02-15 |
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| CN201620800624.6U Expired - Fee Related CN205958415U (en) | 2016-07-27 | 2016-07-27 | Device of particulate matter in grid fractional separation air based on particle diameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092669A (en) * | 2016-07-27 | 2016-11-09 | 广东工业大学 | A kind of method and apparatus of grid fractionated particulate in air based on particle diameter |
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2016
- 2016-07-27 CN CN201620800624.6U patent/CN205958415U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092669A (en) * | 2016-07-27 | 2016-11-09 | 广东工业大学 | A kind of method and apparatus of grid fractionated particulate in air based on particle diameter |
| CN106092669B (en) * | 2016-07-27 | 2019-08-09 | 广东工业大学 | A kind of method and apparatus of the grid classification separation particulate in air based on partial size |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20170727 |