CN109870329A - A kind of artificial radioactive aerosol and the efficient partial size separating and sampling unit of naturally radioactive aerosol - Google Patents
A kind of artificial radioactive aerosol and the efficient partial size separating and sampling unit of naturally radioactive aerosol Download PDFInfo
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Abstract
The present invention relates to a kind of artificial radioactive aerosols and the efficient partial size separating and sampling unit of naturally radioactive aerosol, it include: collection gas chamber, separated gas chamber, gas chamber bottom plate, gas chamber clapboard, adjust gasket, nozzle, collection mouth, collecting pipe, baffle, to collect the ring structure of the collection gas chamber generally both ends open of path particle, end face is connected by gas chamber clapboard and separated gas chamber lower end thereon, its lower end surface is connected by adjusting gasket and gas chamber bottom plate, nozzle to connect outside atmosphere acquisition pipeline is threaded through the upper center of separated gas chamber and is connected by bolt and separated gas chamber, collection mouth to separating particles is threaded through position corresponding with nozzle in the middle part of gas chamber clapboard.The present invention can meet the needs of different-grain diameter range radioaerosol factional sampling measurement, and it is small to have the advantages that separative efficiency height, particle tube wall lose, and can be used as the classification measurement of the different-grain diameters range aerosol such as atmospheric environment PM0.5, PM1.0, PM2.5, PM10.
Description
Technical field
The present invention relates to core and Radiation monitoring technology, specifically a kind of artificial radioactive aerosol and naturally radioactive gas are molten
The efficient partial size separating and sampling unit of glue.
Background technique
In nuclear industry production and during nuclear waste transmutation, there are the artificial radioactive substance such as certain plutonium, enriched uranium, this
A little nucleic particles are likely to disperse and form radioaerosol in air.If staff sucks all class radioaerosols,
Serious Internal radiation injury will be generated to it.Therefore, it is necessary to the artificial aerosol concentrations to these workplaces to be monitored,
To guarantee the safety of staff, to provide technical support using emergency measure in time in the event of an accident.
In artificial radioactive aerosol monitoring, the interference of radon gas and its daughter aerosol is the monitoring spirit of aerosol monitoring instrument
The biggest obstacle of sensitivity.In especially some high radon environment of underground engineering, due to naturally radioactive aerosol (radon daughter) concentration
Height, the influence to monitoring instrument sensitivity and accuracy is big, therefore α energy discrimination method, α/β ratio method, vacation is mostly used to meet method
Deng.It is above-mentioned to influence to improve radiation using elimination size selective sampling due to the continuous variation of technical interior natural radioactivity background
The effect of property aerosol continuous monitor monitoring sensitivity is limited.
Solve radon gas and its daughter interference also some technological means.Currently, according to naturally radioactive aerosol and manually
(material aerosol partial size is generally less than 0.5 μm to the difference of radioactive aerosol granularity characteristic, and the partial size of artificial aerosol is usual
Greater than 1 μm), using partial size isolation technics method, the interference that size selective sampling monitors artificial radioactive aerosol is eliminated, is a kind of
Relatively reasonable solution.This partial size isolation technics uses samplers sample aerosol sample, surveys without lab analysis
Amount, is cut using mechanical particle size, can effectively reduce the interference that naturally radioactive aerosol monitors artificial radioactive aerosol, from
And realize direct-on-line measurement analysis." radioactive aerosol granularity separating and sampling unit " that Chinese Radiation Protection Research Inst announces
(patent No.: 200510056786), which solves radon daughter to a certain extent and does to artificial radioactive aerosol monitoring
Disturb, but the invention there is problems: (1) separating ozzle and collect the radiation of the separative efficiency, different-grain diameter range of ozzle
The separative efficiency of property aerosol is not ideal enough；(2) there are biggish particle tube walls to lose for collection structural pipe wall；It (3) can not be real
It now separates ozzle, collect ozzle size adjusting.These problems influence the accuracy of measurement result to a certain extent.Therefore,
It redesigns and a kind of is necessary with the separating and sampling unit for efficiently separating efficiency.
Summary of the invention
The purpose of the present invention is to propose to a kind of artificial radioactive aerosols to separate with the efficient partial size of naturally radioactive aerosol
Sampling apparatus, is calculated and the design of reasonable structure by simulation so that newly developed separating and sampling unit have separative efficiency it is high,
Particle tube wall loses small advantage, can effectively overcome the shortcomings of in above-mentioned background technique.
To achieve the above object, the invention adopts the following technical scheme: a kind of artificial radioactive aerosol and natural radiation
Property the efficient partial size separating and sampling unit of aerosol, comprising: collect gas chamber, separated gas chamber, gas chamber bottom plate, gas chamber clapboard, adjusting pad
Piece, nozzle, collection mouth, collecting pipe, baffle, the ring junction of the collection gas chamber generally both ends open to collect path particle
Structure, end face is connected by gas chamber clapboard and separated gas chamber lower end thereon, and lower end surface is connected by adjusting gasket and gas chamber bottom plate,
Nozzle to connect outside atmosphere acquisition pipeline is threaded through the upper center of separated gas chamber and is consolidated by bolt and separated gas chamber
Even, the collection mouth to separating particles is threaded through position corresponding with nozzle in the middle part of gas chamber clapboard, collection mouth lower end and to
The collecting pipe for collecting major diameter particle, which is connected to and passes through collecting pipe, to be pressed abd fixed on gas chamber clapboard, the collecting pipe upper end and gas
Room partition is in contact, and lower end passes through gas chamber bottom plate and is fixed on gas chamber bottom plate by baffle, and the baffle is set in collection
Pipe lower end is simultaneously connected by fastening bolt and gas chamber bottom plate, and collecting pipe is pressed on the lower end surface of gas chamber clapboard by baffle when fastening,
Its middle part of the gas chamber clapboard is equipped with the through-hole A that matches with collection mouth, the end face of gas chamber clapboard be additionally provided with it is uniformly distributed to
It is connected to separated gas chamber and collects the through-hole B of gas chamber, the gas chamber bottom plate has set particle outflux, particle outflux and outside
Device to collect path particle is connected to, and the collecting pipe lower end is connected with outside to collect the device of major diameter particle
It is logical；
The nozzle is made of conical entrance, flange and connecting tube, and one end of connecting tube and outside atmosphere acquire pipeline connection,
The other end is solidified as a whole with conical entrance, and connecting tube is equipped with the flange to connect separated gas chamber；The conical entrance its
Generally circular cone structure is axially arranged with the taper hole being connected to connecting tube, and taper hole bottom diameter is consistent with the internal diameter of connecting tube, taper hole
End be equipped with the coaxial clear opening A to be connected to separated gas chamber；
The ring structure of the separated gas chamber generally upper end closed, closed upper surface middle part are equipped with the connection with nozzle
The through-hole that pipe matches, the aperture of through-hole are coaxially arranged with the counterbore matched with the flange of nozzle, the outside cylinder of separated gas chamber
The lower end in face is additionally provided with to connect the flange A for collecting gas chamber；
The upper surface of collection its annular sidewall of gas chamber is equipped with threaded hole corresponding with connecting hole on flange A, collects gas
The lower end on outdoor cylindrical surface is equipped with the flange B to connect gas chamber bottom plate.
The gas chamber clapboard is located at separated gas chamber and collects between gas chamber, generally disc-shaped structure, gas chamber clapboard
End face be equipped with mounting hole corresponding with the connecting hole on flange A, the middle part of gas chamber clapboard is equipped with the step cutting pattern of protrusion, circle
The outer diameter of shape step and the circular inside diameters clearance fit of separated gas chamber, the through-hole A, through-hole B are arranged on step.
The whole gas chamber bottom plate is also disc-shaped structure, and middle part is equipped with the through-hole C passed through for collecting pipe, through-hole
The side of C is equipped with particle outflux, and the outside that gas chamber bottom plate lower end surface is located at through-hole C is provided with uniformly distributed to install baffle
Threaded hole.
The generally internal cylindrical structure for being equipped with taper hole of the collection mouth, the lower end of external cylindrical surface is coaxially arranged with
Step cutting pattern slot A, end face is coaxially arranged with the step cutting pattern matched with through-hole A thereon, and step cutting pattern upper end is coaxially arranged with
The frustum of a cone, the top outer diameter of the frustum of a cone are 1.3 times~1.5 times of clear opening A internal diameter, and frustum of a cone inner upper end is coaxially arranged with directly
Through-hole B, clear opening B are connected with the taper hole inside collection mouth, and the internal diameter of clear opening B is 0.6 times of internal diameter of clear opening A.
The generally round straight tube of the collecting pipe, the upper end of inner wall are equipped with step cutting pattern slot C, the internal diameter of step groove C with
The outer diameter of step groove A is consistent, and the lower end for collecting pipe outer wall is equipped with the step cutting pattern slot D matched with baffle.
The baffle generally annular plate-like structure, the upper end of annular inner wall are provided with step cutting pattern slot E, step groove E
Internal diameter it is consistent with the outer diameter of step groove D.
Spacing between the nozzle and collection mouth is 1 times~1.8 times of clear opening A internal diameter.
Basic principle of the invention: particulate is accelerated with air-flow by nozzle, is then in collection mouth punishment
Two strands: large-sized artificial aerosol inertia is big, divides air motion with center, into inside collection mouth；Small particle natural gas is molten
Glue aerosol inertia is small, is taken away, is flowed to outside collection mouth by surrounding primary air.
Design principle of the invention: according to the design principle of radial inflow separator, main structure is designed；Based on inertia point
From device design theory, to the cutting diameter of radial inflow separatord aeReasonable estimation is carried out, to obtain specific structure type；So
It is based on CFD fluid dynamics software afterwards, flow field simulation is carried out to this granularity separating and sampling unit, is changed according to analog result
Into further decreasing tube wall particle loss；Monodisperse aerosol generator (0.1 μm -10 μm) finally are utilized, to the grain newly developed
The partial size separative efficiency of degree separator carries out experiment test, specifically can be applied to the separative efficiency of on-line measurement.
The beneficial effects of the present invention are: the present invention is fabricated structure, various sizes of component can be matched as needed, because
This, is suitable for industrialized production, meanwhile, nozzle, the axial position of collection mouth is adjustable, can be effective by the way that reasonable spacing is arranged
The tube wall loss for reducing particle, meets the needs of different-grain diameter range radioaerosol factional sampling measurement；The knot of the present apparatus
Configuration formula is designed according to newest theory, and separative efficiency is substantially improved, after testing, the particle for being 1 μm to partial size
Separative efficiency is up to 95% or more, has better met the separation requirement of artificial aerosol, can be used as atmospheric environment PM0.5,
The classification measurement of the different-grain diameters range aerosol such as PM1.0, PM2.5, PM10, meets the sampling of atmospheric environment respirable dust particle
Monitoring requirements；It is supervised online while lower end monitoring device artificial radioactive aerosol can be achieved with naturally radioactive aerosol concentration
It surveys.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the schematic diagram of nozzle.
The schematic diagram of Fig. 3 separated gas chamber.
Fig. 4 is the schematic diagram for collecting gas chamber.
Fig. 5 is the schematic diagram of gas chamber clapboard.
Fig. 6 is the schematic diagram of gas chamber bottom plate.
Fig. 7 is the schematic diagram of collection mouth.
Fig. 8 is the schematic diagram of collecting pipe.
In figure, 1, nozzle, 2, separated gas chamber, 3, gas chamber clapboard, 4, collection gas chamber, 5, collection mouth, 6, gas chamber bottom plate, 7, receipts
Collector, 8, adjustment gasket, 9, baffle, 101, connecting tube, 102, conical entrance, 103, flange, 104, clear opening A, 201, flange
A, 301, through-hole A, 302, through-hole B, 401, flange B, 501, step cutting pattern slot A, 502, clear opening B, 601, through-hole C, 602, grain
Subflow outlet, 701, step cutting pattern slot C, 702, step cutting pattern slot D.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings of the specification.
As shown in Figure of description, a kind of artificial radioactive aerosol is separated with the efficient partial size of naturally radioactive aerosol to be adopted
Sampling device, comprising: nozzle 1, gas chamber clapboard 3, collects gas chamber 4, collection mouth 5, gas chamber bottom plate 6, collecting pipe 7, adjusts separated gas chamber 2
Whole gasket 8, baffle 9, the ring structure of the collection gas chamber 4 generally both ends open to collect path particle, end face is logical thereon
It crosses gas chamber clapboard 3 and 2 lower end of separated gas chamber is connected, lower end surface is connected by adjusting gasket 8 and gas chamber bottom plate 6, to connect
The nozzle 1 of outside atmosphere acquisition pipeline is threaded through the upper center of separated gas chamber 2 and is connected by bolt and separated gas chamber 2, uses
Be threaded through the middle part of gas chamber clapboard 3 position corresponding with nozzle 1 with the collection mouth 5 of separating particles, 5 lower end of collection mouth with to receive
The collecting pipe 7 of collection major diameter particle, which is connected to, to be simultaneously pressed abd fixed on gas chamber clapboard 3 by collecting pipe 7,7 upper end of collecting pipe with
Gas chamber clapboard 3 is in contact, and lower end passes through gas chamber bottom plate and is fixed on gas chamber bottom plate 6 by baffle 9, and the baffle 9 is arranged
It is connected in 7 lower end of collecting pipe and by fastening bolt and gas chamber bottom plate 6, collecting pipe 7 is pressed on gas chamber clapboard when baffle 9 fastens
3 lower end surface, its middle part of the gas chamber clapboard 3 are equipped with the through-hole A301 matched with collection mouth 5, the end face of gas chamber clapboard 3
It is additionally provided with the uniformly distributed through-hole B302 to be connected to separated gas chamber 2 and collect gas chamber 4, the gas chamber bottom plate 6 has set particle
Outflux 602, particle outflux 602 be connected tos with outside to collect the device of path particle, 7 lower end of collecting pipe with outside
Portion is connected to collect the device of major diameter particle；
The nozzle 1 is made of conical entrance 102, flange 103 and connecting tube 101, one end of connecting tube 101 and outside atmosphere
Pipeline connection is acquired, the other end is solidified as a whole with conical entrance 102, and connecting tube 101 is equipped with the method to connect separated gas chamber
Orchid 103；Its generally circular cone structure of the conical entrance 102, is axially arranged with the taper hole being connected to connecting tube 101, bores
Bottom hole diameter is consistent with the internal diameter of connecting tube 101, and the end of taper hole is equipped with the coaxial clear opening to be connected to separated gas chamber 2
A104；
The ring structure of the generally upper end closed of separated gas chamber 2, closed upper surface middle part are equipped with the company with nozzle 1
The through-hole that adapter tube 101 matches, the aperture of through-hole are coaxially arranged with the counterbore matched with the flange 103 of nozzle 1, separated gas chamber
The lower end of 2 external cylindrical surface is additionally provided with to connect the flange A201 for collecting gas chamber 4；
The upper surface of collection 4 its annular sidewall of gas chamber is equipped with threaded hole corresponding with connecting hole on flange A201, receives
The lower end of 4 external cylindrical surface of collection chamber is equipped with the flange B401 to connect gas chamber bottom plate 6.
The gas chamber clapboard 3 is located at separated gas chamber 2 and collects between gas chamber 4, generally disc-shaped structure, gas chamber every
The end face of plate 3 is equipped with mounting hole corresponding with the connecting hole on flange A201, and the middle part of gas chamber clapboard 3 is equipped with the circle of protrusion
Step, the outer diameter of step cutting pattern and the circular inside diameters clearance fit of separated gas chamber 2, the through-hole A301, through-hole B302 are all provided with
It sets on step.
The whole gas chamber bottom plate 6 is also disc-shaped structure, and middle part is equipped with the through-hole passed through for collecting pipe 7
The side of C601, through-hole C601 are equipped with particle outflux 602, and the outside that 6 lower end surface of gas chamber bottom plate is located at through-hole C601 is provided with
The uniformly distributed threaded hole to install baffle 9.
The generally internal cylindrical structure for being equipped with taper hole of the collection mouth 5, the lower end coaxial arrangement of external cylindrical surface
There is step cutting pattern slot A501, end face is coaxially arranged with the step cutting pattern matched with through-hole A301 thereon, and step cutting pattern upper end is same
Axis is provided with the frustum of a cone, and the top outer diameter of the frustum of a cone is 1.3 times~1.5 times of clear opening A104 internal diameter, frustum of a cone inner upper end
It is coaxially arranged with clear opening B502, clear opening B502 is connected with the taper hole inside collection mouth 5, and the internal diameter of clear opening B502 is straight
0.6 times of through-hole A104 internal diameter.
The generally round straight tube of the collecting pipe 7, the upper end of inner wall are equipped with step cutting pattern slot C701, step groove C701's
Internal diameter is consistent with the outer diameter of step groove A501, and the lower end of 7 outer wall of collecting pipe is equipped with the step cutting pattern slot matched with baffle 9
D702。
The baffle 9 generally annular plate-like structure, the upper end of annular inner wall are provided with step cutting pattern slot E, step groove E
Internal diameter it is consistent with the outer diameter of step groove D702.
Spacing between the nozzle 1 and collection mouth 5 is 1 times~1.8 times of clear opening A104 internal diameter.
According to above technical scheme, formula is estimated in conjunction with separator cutting diameter, when sampling flow is 60L/min, cutting
When diameter is 0.5-1 μm of particle, the diameter of corresponding nozzle clear opening A104 is 2-2.8 mm.
Ideally, the diameter of nozzle clear opening A104 can all collect the particle greater than 1 μm, and less than 1
μm particle is not collected all then.
According to a kind of artificial radioactive aerosol designed by the technical program and the efficient partial size of naturally radioactive aerosol
Separating and sampling unit has carried out experiment test, test knot to particle size separator separative efficiency using monodisperse aerosol generator
Fruit is as shown in Table 1.
Table one:
| Aerosol partial size | 0.1μm | 0.3μm | 0.5μm | 1μm | 5μm | 8μm | 10μm |
| Partial size separative efficiency | 82.5% | 88.4% | 90.7% | 95.3 | 96.1 | 99.4% | 99.8% |
Test result shows that the partial size separator of design is 95.3% to the separative efficiency that partial size is 1 μm of particle, separating effect
Meet design requirement；To the separative efficiency that partial size is 10 μm of particles close to 100%.
Partial size separator designed by the present invention can realize separation ozzle, collect by adjusting modes such as gasket, bolts
Nozzle size and spacing adjustment, meet the needs of different-grain diameter range radioaerosol factional sampling measurement.
Partial size separator designed by the present invention can be used as the differences such as atmospheric environment PM0.5, PM1.0, PM2.5, PM10
The classification measurement of particle size range aerosol, meets the sampling monitoring demand of atmospheric environment respirable dust particle.
Pass through efficiently separating, it can be achieved that lower end monitoring device artificial radioactive aerosol and naturally radioactive gas for the present apparatus
It is monitored on-line while collosol concentration.
Part not in the detailed description of the invention is the prior art.
Claims (7)
1. a kind of artificial radioactive aerosol and the efficient partial size separating and sampling unit of naturally radioactive aerosol, including collect gas
Room, separated gas chamber, gas chamber bottom plate, gas chamber clapboard, adjustment gasket, nozzle, collection mouth, collecting pipe, baffle, it is characterized in that: to
The ring structure of the collection gas chamber generally both ends open of path particle is collected, end face passes through gas chamber clapboard and separated gas chamber thereon
Lower end is connected, and lower end surface is connected by adjusting gasket and gas chamber bottom plate, and the nozzle to connect outside atmosphere acquisition pipeline is worn
It is located at the upper center of separated gas chamber and is connected by bolt and separated gas chamber, the collection mouth to separating particles is threaded through gas chamber
Position corresponding with nozzle in the middle part of partition, collection mouth lower end is connected to the collecting pipe to collect major diameter particle and passes through collection
Pipe is pressed abd fixed on gas chamber clapboard, and the collecting pipe upper end is in contact with gas chamber clapboard, and lower end passes through gas chamber bottom plate and leads to
It crosses baffle to be fixed on gas chamber bottom plate, the baffle is set in collecting pipe lower end and consolidates by fastening bolt and gas chamber bottom plate
Even, collecting pipe is pressed on to the lower end surface of gas chamber clapboard, its middle part of the gas chamber clapboard is equipped with and collection mouth when baffle fastens
The through-hole A matched, the end face of gas chamber clapboard are additionally provided with the uniformly distributed through-hole B to be connected to separated gas chamber and collect gas chamber, institute
The gas chamber bottom plate stated has set particle outflux, and particle outflux is connected to outside to collect the device of path particle, described
Collecting pipe lower end be connected with outside to collect the device of major diameter particle；
The nozzle is made of conical entrance, flange and connecting tube, and one end of connecting tube and outside atmosphere acquire pipeline connection,
The other end is solidified as a whole with conical entrance, and connecting tube is equipped with the flange to connect separated gas chamber；The conical entrance its
Generally circular cone structure is axially arranged with the taper hole being connected to connecting tube, and taper hole bottom diameter is consistent with the internal diameter of connecting tube, taper hole
End be equipped with the coaxial clear opening A to be connected to separated gas chamber；
The ring structure of the separated gas chamber generally upper end closed, closed upper surface middle part are equipped with the connection with nozzle
The through-hole that pipe matches, the aperture of through-hole are coaxially arranged with the counterbore matched with the flange of nozzle, the outside cylinder of separated gas chamber
The lower end in face is additionally provided with to connect the flange A for collecting gas chamber；
The upper surface of collection its annular sidewall of gas chamber is equipped with threaded hole corresponding with connecting hole on flange A, collects gas
The lower end on outdoor cylindrical surface is equipped with the flange B to connect gas chamber bottom plate.
2. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: the gas chamber clapboard is located at separated gas chamber and collects between gas chamber, generally disc-shaped structure,
The end face of gas chamber clapboard is equipped with mounting hole corresponding with the connecting hole on flange A, and the middle part of gas chamber clapboard is equipped with the circle of protrusion
Shape step, the outer diameter of step cutting pattern and the circular inside diameters clearance fit of separated gas chamber, the through-hole A, through-hole B are arranged at platform
On rank.
3. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: it is also disc-shaped structure that the gas chamber bottom plate is whole, middle part is logical equipped with passing through for collecting pipe
The side of hole C, through-hole C are equipped with particle outflux, and the outside that gas chamber bottom plate lower end surface is located at through-hole C is provided with uniformly distributed to pacify
Fill the threaded hole of baffle.
4. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: the generally internal cylindrical structure for being equipped with taper hole of the collection mouth, the lower end of external cylindrical surface are same
Axis is provided with step cutting pattern slot A, and end face is coaxially arranged with the step cutting pattern matched with through-hole A thereon, and step cutting pattern upper end is same
Axis is provided with the frustum of a cone, and the top outer diameter of the frustum of a cone is 1.3 times~1.5 times of clear opening A internal diameter, and frustum of a cone inner upper end is coaxial
It is provided with clear opening B, clear opening B is connected with the taper hole inside collection mouth, and the internal diameter of clear opening B is the 0.6 of clear opening A internal diameter
Times.
5. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: the generally round straight tube of the collecting pipe, the upper end of inner wall is equipped with step cutting pattern slot C, step groove C
Internal diameter it is consistent with the outer diameter of step groove A, the lower end for collecting pipe outer wall is equipped with the step cutting pattern slot D that matches with baffle.
6. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: the baffle generally annular plate-like structure, the upper end of annular inner wall are provided with step cutting pattern slot E,
The internal diameter of step groove E is consistent with the outer diameter of step groove D.
7. a kind of artificial radioactive aerosol according to claim 1 is separated with the efficient partial size of naturally radioactive aerosol and is adopted
Sampling device, it is characterized in that: the spacing between the nozzle and collection mouth is 1 times~1.8 times of clear opening A internal diameter.
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Cited By (3)
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| CN110406103A (en) * | 2019-08-01 | 2019-11-05 | 广东工业大学 | Aerosol direct write printing device and its sampling focus composite spray jet head device |
| CN117516996A (en) * | 2023-11-07 | 2024-02-06 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
| CN117516996B (en) * | 2023-11-07 | 2024-05-28 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
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