CN205786028U - A kind of PM2.5 screening plant based on particle diameter - Google Patents
A kind of PM2.5 screening plant based on particle diameter Download PDFInfo
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- CN205786028U CN205786028U CN201620228193.0U CN201620228193U CN205786028U CN 205786028 U CN205786028 U CN 205786028U CN 201620228193 U CN201620228193 U CN 201620228193U CN 205786028 U CN205786028 U CN 205786028U
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Abstract
The utility model discloses a kind of PM2.5 screening plant based on particle diameter, it is that fine particle is screened by the size according to fine particle size, including hermetic container and two or more pallet, pallet is placed in the inside of hermetic container, pallet has the uniform array pit of different-diameter size, and pit is blind hole；Pit has and the through hole of pit concentric；Pit and through hole form two-layer structure, and the diameter of pit and through hole is determined according to the particle diameter of the fine particle of screening, and blind hole is for collecting the fine particle of corresponding particle diameter, and through hole is for by the fine particle discharge less than this correspondence particle diameter.Collection precision of the present utility model is high, collects controllable quantity, and fine particle will not adhere to and reunite, convenient extraction and detection.
Description
Technical field
This utility model relates to chemical analysis field, particularly to a kind of PM2.5 screening plant based on particle diameter.
Background technology
PM2.5 i.e. fine particle, refers to that in atmospheric environment, aerodynamic diameter is less than or equal to the particulate matter of 2.5 μm.Although PM2.5 is that in earth atmosphere air, content is a little, but it is very big to environment and Human health effects, the pellet of different-grain diameter is trapped in the different parts of respiratory tract will cause different respiratory tract diseases, and PM2.5 has a strong impact on air quality and visibility.Therefore, separate PM2.5 based on particle diameter to can be used for making a concrete analysis of PM2.5 to health and the impact of environment.
At present, main method based on particle diameter separation particulate in air has: (1) filter membrane weight method, it is to extract a certain amount of volumes of air by sampler with constant rate of speed, particulate matter in air is trapped within filter membrane, in conjunction with filter membrane weight before sampling after change and sampled air volume, calculate concentration；But some superfine little granules still can cause Lower result through filter membrane, other materials are likely to be caused result higher by filter membrane absorption simultaneously.(2) light scattering method, owing in real process, relation between scattering of light and particle concentration is affected by factors such as the chemical composition of particulate matter, form, proportions, the accuracy of this technology is the highest.(3) β ray method, its ultimate principle is to utilize the change being deposited in the β ray attenuation amount that carbon-14 is discharged by the particulate matter adapted on filter membrane to measure the change of Atmospheric particulates quality, but determination data generally there are deviation, and the highest in the fault rate of moist high-temperature area.(4) trace concussion sedimentation balance method, mainly by conical component trace oscillating balance principle, but current technology cannot solve volatility and the loss of half volatile material after sample heating, causes measurement result on the low side.And, the above-mentioned particulate separation method being all in particle size range aspect, separating resulting is the most coarse, it is impossible to according to its particle diameter, PM2.5 carries out clean cut separation, thus the detection and subsequent analysis to PM2.5 impacts.
Summary of the invention
The purpose of this utility model is to overcome shortcoming present in prior art, it is provided that a kind of PM2.5 screening plant based on particle diameter, this device can carry out clean cut separation to PM2.5, and technique is simple and convenient to operate.
The purpose of this utility model is achieved through the following technical solutions:
A kind of PM2.5 screening plant based on particle diameter, is that fine particle is screened by the size according to fine particle size, and including hermetic container 1 and two or more pallet, pallet is placed in the inside of hermetic container 1.
A kind of PM2.5 screening technique based on particle diameter, is that fine particle is screened by the size according to fine particle size, comprises the steps:
(1) a certain amount of air to be checked after drying is passed through in hermetic container 1, hermetic container 1 keeps flat two or more pallets；
(2) then hermetic container 1 is sealed, stand 10～30 minutes, make in the array pit 6 of the correspondingly-sized that the fine particle 5 in air to be checked fully deposits to each pallet；
(3) from hermetic container 1, take out all of pallet, from various sizes of array pit 6, extract the fine particle 5 of corresponding particle diameter respectively, and carry out detection analysis.
The size of described pallet is: length and width 1～500mm, thickness 1～5mm, and shape does not limits, and can justify；Preferred size is 100*100*1mm.
Described pallet has the uniform array pit of different-diameter size, and pit is blind hole；Pit has and the through hole of pit concentric；Pit and through hole form two-layer structure, and the diameter of pit and through hole is determined according to the particle diameter of the fine particle of screening, and blind hole is for collecting the fine particle of corresponding particle diameter, and through hole is for by the fine particle discharge less than this correspondence particle diameter；Pit quantity is the most, collects fine particle the most.
The quantity of pallet pits is 10000～108Individual, the spacing between pit is 0.1～0.5um, and pit rectangular array is centered at pallet.And, the shape of pallet, size, pit spacing, quantity and array way can change according to specific needs and optimize.
The material of described pallet is the smooth surfaces such as metal, polymer or glass and the material being prone to microfabrication.
Pit and through hole on pallet are to be processed by micro-fabrication technology, and form accuracy is controlled；Pit bottom can be processed into hemispherical, and the convenient fine particle being less than or equal to through-hole diameter is discharged from through hole, prevents it from remaining in pit.
Described pallet has 3, including pallet 1, pallet 23, pallet 34.
The a diameter of 0.5um of pit 6 of pallet 1, the degree of depth is 0.5um, for the collection cut size fine particle 5 less than or equal to 0.5um.
The a diameter of 1.5um of pit 6 of pallet 23, the degree of depth is 1.5um, pit has the through hole 7 of a diameter of 0.5um with pit concentric, for collection cut size fine particle 5 between 0.5-1.5um, wherein the particle diameter fine particle 5 less than or equal to 0.5um can be discharged by the through hole 7 of pallet 23, will not remain in its pit 6.
The a diameter of 2.5um of pit 6 of pallet 34, the degree of depth is 2.5um, pit has the through hole 7 of a diameter of 1.5um with pit concentric, for collection cut size fine particle 5 between 1.5-2.5um, wherein the particle diameter fine particle 5 less than or equal to 1.5um can be discharged by the through hole 7 of pallet 34, will not remain in its pit 6.
Can also be by preparing the collection that the array pit of different-diameter realizes the fine particle of different-grain diameter size.
In step 3, the particle diameter of the fine particle 5 that pallet 1 is collected is less than or equal to 0.5um；The particle diameter of the fine particle 5 that pallet 23 is collected is between 0.5-1.5um；The particle diameter of the fine particle 5 that pallet 34 is collected is between 1.5-2.5um.
The principle of this device is work principle of filter, fine particle is considered as ball, the diameter of single pit and the degree of depth in theory and determines to collect size and the number of fine particle；Wherein the pit of pallet 1 is less than or equal to the fine particle of 0.5um for collection cut size, and a pit accommodates a fine particle；The pit of pallet 23 is used for collection cut size fine particle between 0.5-1.5um, and wherein the particle diameter fine particle less than or equal to 0.5um can be discharged by through hole；The pit of pallet 34 is used for collection cut size fine particle between 1.5-2.5um, and wherein the particle diameter fine particle less than or equal to 1.5um can be discharged by through hole；The diameter of single pit and the degree of depth determine the size and number of accommodated fine particle, and the most single pit accommodates the fine particle of single corresponding particle diameter, and the quantity of array pit is the most, then the fine particle collected is the most；And air to be checked is passed through after drying, prevents fine particle from adhering to and reunite；Fine particle is contained in pit after standing, it is simple to extracts and detects.
This utility model compared with prior art has the advantage that and effect:
(1) this utility model is to collect fine particle based on size, and it collects precision height, collects controllable quantity.
(2) air to be checked is dried process by this utility model so that fine particle will not adhere to and reunite, and extracts and easy to detect.
(3) this utility model has different size of uniform array pit realize by using micro-fabrication technology to prepare on pallet, and pit diameter and the degree of depth are controlled.
Accompanying drawing explanation
Fig. 1 is the structural representation of hermetic container and pallet.
Fig. 2 is the schematic diagram of fine particle deposition process.
Fig. 3 is the schematic diagram that fine particle is deposited on pallet.
In figure, 1: hermetic container；2, pallet one；3, pallet two；4, pallet three；5, fine particle；6, pit；7, through hole.
Detailed description of the invention
Below in conjunction with embodiment, this utility model done further detailed description, but embodiment of the present utility model is not limited to this.
Embodiment
A kind of PM2.5 screening plant based on particle diameter, is that fine particle is screened by the size according to fine particle size, and including hermetic container 1 and pallet 1, pallet 23, pallet 34, three pallets are placed in the inside of hermetic container.
A kind of PM2.5 screening technique based on particle diameter, is that fine particle is screened by the size according to fine particle size, comprises the steps:
(1) a certain amount of air to be checked after drying is passed through in hermetic container 1, hermetic container 1 keeps flat three pallets: include pallet 1, pallet 23, pallet 34, as shown in Figure 1；
(2) then hermetic container 1 is sealed, stand 10～30 minutes, make in the array pit 6 of the correspondingly-sized that the fine particle 5 in air to be checked fully deposits to each pallet, as shown in Figure 2；
(3) taking out all of pallet from hermetic container 1, extract the fine particle 5 of corresponding particle diameter respectively, and carry out detection analysis from various sizes of array pit 6, as it is shown on figure 3, wherein, the particle diameter of the fine particle 5 that pallet 1 is collected is less than or equal to 0.5um；The particle diameter of the fine particle 5 that pallet 23 is collected is between 0.5-1.5um；The particle diameter of the fine particle 5 that pallet 34 is collected is between 1.5-2.5um.
The a diameter of 0.5um of pit 6 of pallet 1, the degree of depth is 0.5um, for the collection cut size fine particle 5 less than or equal to 0.5um.
The a diameter of 1.5um of pit 6 of pallet 23, the degree of depth is 1.5um, pit has again the through hole 7 of a diameter of 0.5um with pit concentric, for collection cut size fine particle 5 between 0.5-1.5um, wherein the particle diameter fine particle 5 less than or equal to 0.5um can be discharged by the through hole 7 of pallet 23, will not remain in its pit 6.
The a diameter of 2.5um of pit 6 of pallet 34, the degree of depth is 2.5um, pit has again the through hole 7 of a diameter of 1.5um with pit concentric, for collection cut size fine particle 5 between 1.5-2.5um, wherein the particle diameter fine particle 5 less than or equal to 1.5um can be discharged by the through hole 7 of pallet 34, will not remain in its pit 6.
Claims (8)
1. a PM2.5 screening plant based on particle diameter, it is characterised in that: including hermetic container and two or more pallet, pallet is placed in the inside of hermetic container；The size of described pallet is: length and width 1～500mm, thickness 1～5mm；Described pallet has the uniform array pit of different-diameter size, and pit is blind hole；Pit has and the through hole of pit concentric；Pit and through hole form two-layer structure, and the diameter of pit and through hole is determined according to the particle diameter of the fine particle of screening, and blind hole is for collecting the fine particle of corresponding particle diameter, and through hole is for by the fine particle discharge less than this correspondence particle diameter.
PM2.5 screening plant based on particle diameter the most according to claim 1, it is characterised in that: the quantity of pallet pits is 10000～108Individual, the spacing between pit is 0.1～0.5um, and pit rectangular array is centered at pallet.
PM2.5 screening plant based on particle diameter the most according to claim 1, it is characterised in that: the material of described pallet is metal, polymer or glass.
PM2.5 screening plant based on particle diameter the most according to claim 1, it is characterised in that: pit bottom is hemispherical.
PM2.5 screening plant based on particle diameter the most according to claim 1, it is characterised in that: described pallet has 3, including pallet one (2), pallet two (3), pallet three (4).
PM2.5 screening plant based on particle diameter the most according to claim 5, it is characterised in that: the pit diameter of pallet one (2) is 0.5um, and the degree of depth is 0.5um, for the collection cut size fine particle less than or equal to 0.5um.
PM2.5 screening plant based on particle diameter the most according to claim 5, it is characterized in that: the pit diameter of pallet two (3) is 1.5um, the degree of depth is 1.5um, pit has the through hole of a diameter of 0.5um with pit concentric, for collection cut size fine particle between 0.5-1.5um.
PM2.5 screening plant based on particle diameter the most according to claim 5, it is characterized in that: the pit diameter of pallet three (4) is 2.5um, the degree of depth is 2.5um, pit has the through hole of a diameter of 1.5um with pit concentric, for collection cut size fine particle between 1.5-2.5um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620228193.0U CN205786028U (en) | 2016-03-22 | 2016-03-22 | A kind of PM2.5 screening plant based on particle diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620228193.0U CN205786028U (en) | 2016-03-22 | 2016-03-22 | A kind of PM2.5 screening plant based on particle diameter |
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| Publication Number | Publication Date |
|---|---|
| CN205786028U true CN205786028U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620228193.0U Expired - Fee Related CN205786028U (en) | 2016-03-22 | 2016-03-22 | A kind of PM2.5 screening plant based on particle diameter |
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| CN (1) | CN205786028U (en) |
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2016
- 2016-03-22 CN CN201620228193.0U patent/CN205786028U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20161207 Termination date: 20180322 |