CN105067417B - A kind of gas fine particle enrichment method device - Google Patents
A kind of gas fine particle enrichment method device Download PDFInfo
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- CN105067417B CN105067417B CN201510474691.3A CN201510474691A CN105067417B CN 105067417 B CN105067417 B CN 105067417B CN 201510474691 A CN201510474691 A CN 201510474691A CN 105067417 B CN105067417 B CN 105067417B
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Abstract
The present invention provides a kind of gas fine particle enrichment method device, including humidifier 1, cooling tube 2, virtual impactor 3, counter-flow drier 4, the first aspiration pump 7 and the second aspiration pump 8, further includes constant temperature refrigeration sink 5 and particulate matter mixing chamber 6.The device is acted on by a series of physical and carries out enrichment method to the fine particle in gas, it can realize to the concentration 30 times maximum of fine particle in gas, and output is stablized, avoid the problems such as pollution environment or ultrasonic Separation cause fine grained physical damage or fibre shedding when conventional method produces gas fine particle, it is efficient, it is easy to operate, it can realize the simulation to real high concentration fine particle pollution environment.
Description
Technical field
The present invention relates to a kind of apparatus and method of gas fine particle enrichment method.
Background technology
With the development of economic society and the raising of quality of life, people increasingly pay close attention to for air quality, especially
China's atmospheric environment deteriorates in recent years, occurs severe haze more, has seriously affected the normal life of people.Due to big
Gas combined pollution problem is on the rise, and the research for the pollution of gas fine particle is increasingly taken seriously.Gas fine particle
(PM2.5 usually said) refers to solid suspended particles of the particle diameter less than 2.5 μm in air, is with the region seriously endangered
Property atmosphere pollution.
In environmental science and biomedical sector, in order to study influence of the haze to human health, it is necessary to which to build gas thin
Particulate matter test environment.In order to obtain gas fine particle needed for test environment, common method is Design pollution source, right
The gas fine particle that pollution sources produce is collected, and test environment is built with the gas fine particle being collected into.This method
It is easy to operate although cost is low, easily cause environmental pollution, and the gas fine particle concentration produced is relatively low and not
Uniformly, to obtain purer PM2.5 particles will also carry out the processing such as ultrasonic Separation, these processing be easy to cause fine particle
The problems such as physical damage or fibre shedding.Another more typical method is simulated using liquid aersol, this method
Although output is stablized and gas fine particle even concentration, it can still pollute and this method cannot simulate really thin
Grain thing pollution environment.
Therefore, there is an urgent need for a kind of of low cost, convenient operating maintenance, gas fine particle that is compact-sized, producing are dense at present
Degree is big and stablizes, the gas fine particle occurrence of equipment of simulation true environment, but there is not been reported for this kind equipment.
In specification " background technology " part disclosure, contribute to skilled artisan understands that the technology of the present invention
Scheme, but should not think that these contents necessarily belong to the prior art or common knowledge accordingly.
The content of the invention
The present invention provides a kind of gas fine particle enrichment method device.
Gas fine particle enrichment method device, including humidifier 1, cooling tube 2, virtual impactor 3, counter-flow drier 4,
First aspiration pump 7 and the second aspiration pump 8.Cooling tube 2 is connected with humidifier 1 and virtual impactor 3 respectively, and virtual impactor 3 is also
It is connected with 4 and first aspiration pump 7 of counter-flow drier, counter-flow drier 4 is also connected with the second aspiration pump 8.It is additionally provided with humidifier 1
Gas input port, is additionally provided with gas delivery port on counter-flow drier 4.
Virtual impactor 3 includes taper input pipe 9, filtering inner cavity 10, output straight tube 11 and air force interface 12.Taper
Input pipe 9 is extended through in filtering inner cavity 10 from the bottom surface of virtual impactor 3, and the top surface of output straight tube 11 from virtual impactor 3 passes through
Through in filtering inner cavity 10.
Taper input pipe 9 is connected with cooling tube 2, and output straight tube 11 is connected with counter-flow drier 4, and air force interface 12 is used
In by the first aspiration pump 7 with filtering inner cavity 10 connect.
Cooling tube 2 has inside and outside two chambers, and exocoel cools down inner cavity by liquid circulation.Gas fine particle enrichment method
Device further includes constant temperature refrigeration sink 5, and the input port of constant temperature refrigeration sink 5 connects with 2 exocoel of cooling tube respectively with delivery outlet
Mouth is connected with upper interface.
Dry particle is filled with counter-flow drier 4.
Gas fine particle enrichment method device further includes particulate matter mixing chamber 6.Counter-flow drier 4 is mixed by particulate matter
Chamber 6 is connected with the second aspiration pump 8.At this time, the gas delivery port being located on counter-flow drier 4 is changed and is located at particulate matter mixing chamber 6
On.
Cooling tube 2, virtual impactor 3, counter-flow drier 4 and first in gas fine particle enrichment method device are evacuated
Pump 7 is arranged to multiple (i.e. two or more), and multiple counter-flow driers 4 are connected with same particulate matter mixing chamber 6 respectively.
Gas fine particle concentrated method, including：
Gas containing particulate matter is mixed with the water vapour higher than environment temperature；
Mixed gas flows from bottom to top, is cooled in flow process；
Mixed gas after cooling inputs virtual impactor 3 from taper input pipe 9, and crude product is exported from output straight tube 11；
Dry crude product.
The method of gas fine particle enrichment method, further includes：
After crude product drying, mixed in particulate matter mixing chamber 6.
In the description of the present invention, the word such as " comprising " should understand according to open language mode.For example, gas fine grained
Virtual impactor 3 is connected with the 7 of the first aspiration pump and is generally realized by rubber tube in thing enrichment method device, people in the art
Member is easy to associate rubber tube by reading technical solution of the present invention and combining the prior art or publicity general knowledge, therefore the present invention
Omitted in description, this has no effect on the integrality of technical solution of the present invention.
Gas fine particle enrichment method device provided by the invention, is acted on to thin in gas by a series of physical
Grain thing carries out enrichment method, can realize to the concentration 30 times maximum of fine particle in gas, and exports and stablize, and avoids tradition
The problems such as pollution environment or ultrasonic Separation cause fine grained physical damage or fibre shedding when method produces gas fine particle.
The unit efficiency is high, easy to operate, can realize the simulation that environment is polluted to real high concentration fine particle, environmental science,
Biomedical and other association areas are with a wide range of applications.
Brief description of the drawings
Fig. 1 is the structure diagram of virtual impactor 3.In figure：9th, taper input pipe, 10, filtering inner cavity, 11, output it is straight
Pipe, 12, air force interface.
Fig. 2 is the structure diagram of gas fine particle enrichment method device.In figure：1st, humidifier, 2, cooling tube, 3, empty
Intend impactor, 4, counter-flow drier, 5, constant temperature refrigeration sink, 6, particulate matter mixing chamber, the 7, first aspiration pump, the 8, second pumping
Pump.
Embodiment
Embodiments of the present invention are further illustrated below.It should be noted that the scope of the present invention is not
It is confined to described embodiment.Any technology essential factor in described embodiment is carried out identical or waited
It is same to replace the technical solution obtained or those skilled in the art on the basis of described embodiment without creation
Property the technical solution that is obtained with of work, should all be contemplated as falling within protection scope of the present invention.
Gas fine particle enrichment method device, including humidifier 1, cooling tube 2, virtual impactor 3, counter-flow drier 4,
First aspiration pump 7 and the second aspiration pump 8.Cooling tube 2 is connected with humidifier 1 and virtual impactor 3 respectively, and virtual impactor 3 is also
It is connected with 4 and first aspiration pump 7 of counter-flow drier, counter-flow drier 4 is also connected with the second aspiration pump 8.It is additionally provided with humidifier 1
Gas input port, is additionally provided with gas delivery port on counter-flow drier 4.
Humidifier 1 can select water-bath.
Dry particle is filled with counter-flow drier 4.Dry particle selects discoloration silica gel.Discoloration silica gel is added in silica gel
Some inorganic salts with the crystallization water are entered and a small amount of silicon dichloride are made.Discoloration silica gel has suction-operated to hydrone
And there is no suction-operated for gas fine particle.Toasted after discoloration silica gel water suction discoloration in drying box, nothing can be returned to
Water state recycles.
First aspiration pump 7 provides the primary aerodynamic of gas circuit in a device, and power requirement is higher, can select power
The high-power mute oilless vacuum pump of 1000W.Second aspiration pump 8 provides air to fine particle output channel in a device and moves
Power, power requirement is relatively low, can select the small-power air pump of power 200W.
The structure of virtual impactor 3 is as shown in Figure 1, including taper input pipe 9, filtering inner cavity 10, output straight tube 11 and sky
Aerodynamic force interface 12.Taper input pipe 9 is extended through in filtering inner cavity 10 from the bottom surface of virtual impactor 3, exports straight tube 11 from void
The top surface for intending impactor 3 is extended through in filtering inner cavity 10.Taper input pipe 9 is connected with cooling tube 2, and output straight tube 11 is dry with adverse current
Dry device 4 connects, and air force interface 12 is used to connect the first aspiration pump 7 with filtering inner cavity 10.
The shape of 3 main body of virtual impactor is cylinder, is formed by the docking of upper and lower two parts.The basal diameter of cylinder
101.8mm high 79mm.
The shape of filtering inner cavity 10 is cylinder, the basal diameter 85.3mm, high 67mm of cylinder.
Taper input pipe 9 is formed by connecting by cylindrical tube and conical tube.Cylindrical tube interior diameter 20.3mm, overall diameter
25.3mm, high 32.2mm.Conical tube bottom surface interior diameter 20.3mm, overall diameter 25.3mm, conical tube upper bottom surface interior diameter
5mm, overall diameter 8mm, the high 34.2mm of conical tube.
Output straight tube 11 is cylindrical tube, cylindrical tube interior diameter 5mm, overall diameter 9mm.Export straight tube 11 bottom surface with
The distance between conical pipe upper bottom surface of taper input pipe 9 is 6mm.
Air force interface 12 is arranged on the top surface of virtual impactor 3, and the interior diameter with filtering 10 junction of inner cavity is
15mm。
The bottom surface of the conical tube of taper input pipe 9 is overlapped with filtering the bottom surface of inner cavity 10.The circle of taper input pipe 9
The overlapping of axles of the axis of column tube and conical tube, the axis for filtering inner cavity 10 and output straight tube 11 is (on connecting cylinder body or cone
The straight line in the bottom surface center of circle is known as axis).
The operation principle of gas fine particle enrichment method device is specifically described below.Humidifier 1 selects water-bath, water-bath
The methods of pot passes through capping is closed with extraneous.A certain number of water are housed in water-bath, a cavity is formed above the water surface.It is logical
Crossing intermittent heating can be such that the temperature of water is maintained at higher than 3 DEG C to 5 DEG C of environment temperature.Gas (gas containing particulate matter
Can be contaminated air or laboratory exhaust gas, industrial waste gas etc..Particle containing unequigranular in the gas
Thing, existing fine particle also have larger particulate matter, and the distribution of particulate matter is also uneven) from the gas input port on water-bath
Into in the cavity of water-bath.Under the action of the first aspiration pump 7 and the second aspiration pump 8, the cavity of water-bath is in negative pressure, gas
Body enters water-bath in impact (from top to bottom move along a straight line) state, at this time the straight line under the effect of gravity of the bulky grain thing in gas
Elliptical gear is to the water surface, and the water surface has adhesive attraction, therefore bulky grain thing is left in water.And the fine particle in gas is in air
Parabolically moved under the action of dynamics, due to being full of water vapour in cavity, fine particle is steamed after floating in cavity by water
Drum is wrapped up in.The mixing of water vapour and the gas containing particulate matter causes the gas containing particulate matter to be heated, and relative humidity reaches
More than 90%, while some bulky grain things in gas are removed.Under the action of the first aspiration pump 7 and the second aspiration pump 8, mix
Close gas in cooling tube 2 to rise and (flow from bottom to top), be cooled in uphill process, existed by the fine particle that water vapour wraps up
Condensed during cooling, the particle of condensation constantly collides, its particle diameter is constantly grown up.
After mixed gas is by cooling tube 2, inputted by taper input pipe 9 in virtual impactor 3.Mixed gas is defeated by taper
Enter pipe 9 to input in the filtering inner cavity 10 of virtual impactor 3, as 9 conical tube internal diameter of taper input pipe is gradually reduced, gas stream
Speed is continuously improved, and according to gas dynamics, the smaller particle speed of particle diameter is faster in gas, when gas is from taper input pipe
Speed reaches most fast during 9 outflow.Filtering inner cavity 10 is formed under the action of the first aspiration pump 7 to condensing fine grained in cooling tube 2
The suction acceleration of the gas of thing, while done work by aerodynamic side force, bulky grain thing does parabolic motion, thus
Realize the screening and filtering to bulky grain thing.Fine particle can enter defeated since speed is fast under the action of the second aspiration pump 8
Go out straight tube 11, become the crude product exported from output straight tube 11.
Crude product enters counter-flow drier 4, and crude product is dried in counter-flow drier 4, at this time the moisture in crude product
Be completely absorbed, from gas delivery port output be the fine particle containing enrichment method gas (i.e. final product).
View of the above, it will be seen that in the technical solution of the present invention, virtual impactor 3 plays vital work
With.The commissioning experience of virtual impactor 3 is shown, to reach the concentrated effect that fine particle is 30 times maximum in gas, before institute
The each size for the virtual impactor 3 stated is most preferably numerical value.If relative dimensions change, the concentration of fine particle in gas
Effect will decline, and therefore, realize gas fine particle enrichment method device, can be in the most preferably size of virtual impactor 3
On the basis of, determine the size of humidifier 1, cooling tube 2, counter-flow drier 4 etc., make it cooperating.
In order to reach preferable cooling effect, cooling tube 2 has inside and outside two chambers, and mixed gas is in the lumen from bottom to top
Flowing, exocoel cool down (being cooled down to the gas flowed in inner cavity) by liquid circulation to inner cavity.In order to match somebody with somebody with cooling tube 2
Close use, gas fine particle enrichment method device further include constant temperature refrigeration sink 5, constant temperature refrigeration sink 5 be equipped with input port with
Delivery outlet, input port are connected with lower interface of the delivery outlet respectively with 2 exocoel of cooling tube with upper interface.Used in constant temperature refrigeration sink 5
In the liquid of circularly cooling be water with ethylene glycol according to 1:The mixed liquor that 1 volume ratio mixes, constant temperature refrigeration sink 5 export
Mixed liquor temperature between -1 DEG C to -5 DEG C.Input port and the delivery outlet of constant temperature refrigeration sink 5 respectively with 2 exocoel of cooling tube
Lower interface be connected with upper interface, circulation loop can be formed.
Gas fine particle enrichment method device further includes particulate matter mixing chamber 6.Counter-flow drier 4 is mixed by particulate matter
Chamber 6 is connected with the second aspiration pump 8.At this time, the gas delivery port being located on counter-flow drier 4 is changed and is located at particulate matter mixing chamber 6
On.
Particulate matter mixing chamber 6 can select hollow cylinder, and the volume of hollow cylinder hollow parts is (hollow more than 15L
Part is closing relative to external environment in addition to connection counter-flow drier 4, the second aspiration pump 8 and gas delivery port).Slightly
After product is dry in counter-flow drier 4, then it is sufficiently mixed in particulate matter mixing chamber 6.Particulate matter mixing chamber 6 is especially suitable
Designed together in multichannel.So-called multichannel design, refers to cooling tube 2, the virtual impactor in gas fine particle enrichment method device
3rd, 4 and first aspiration pump 7 of counter-flow drier is arranged to multiple (if it is necessary, humidifier 1 be also configured as multiple), multiple adverse currents
Drier 4 is connected with same particulate matter mixing chamber 6 respectively.Each cooling tube 2, virtual impactor 3, counter-flow drier 4 and
One aspiration pump 7 forms an independent gas circuit.Gas fine particle enrichment method device is designed as multiple gas circuits and works at the same time, and shows
So can be with the amount of aggrandizement apparatus enrichment method fine particle in the unit interval.Adverse current of the crude product of multiple gas circuits through each gas circuit
After drier 4 is dried, sufficiently mixed in particulate matter mixing chamber 6, be re-used as final product output, can be ensured final
Fine particle in product has the higher uniformity.
Fig. 2 gives the structure diagram of a gas fine particle enrichment method device, and specific implementation is contained in figure
All components described in mode.In Fig. 2 from gas input port input be contaminated air.
Utilize gas fine particle enrichment method device, it is possible to achieve gas fine particle concentrated method.Certainly, it is real
Existing gas fine particle concentrated method, it is not necessarily non-rich using the described gas fine particle concentration of embodiment
Acquisition means, can using other devices with similar functions.
Gas fine particle concentrated method, including：
Gas containing particulate matter is mixed with the water vapour higher than environment temperature.This can be realized in humidifier 1.
Mixed gas flows from bottom to top, is cooled in flow process.This can be realized in cooling tube 2.
Mixed gas after cooling inputs virtual impactor 3 from taper input pipe 9, and crude product is exported from output straight tube 11.
Dry crude product.This can be realized in counter-flow drier 4.
The method of gas fine particle enrichment method, further includes：
After crude product drying, mixed in particulate matter mixing chamber 6.If gas fine particle enrichment method device is using more
Road is designed, and gas fine particle concentrated method can include this step.
Claims (9)
1. virtual impactor, it is characterised in that the virtual impactor (3) includes taper input pipe (9), filtering inner cavity
(10), straight tube (11) and air force interface (12) is exported, the taper input pipe (9) is from the bottom surface of virtual impactor (3)
Extend through in filtering inner cavity (10), the top surface of output straight tube (11) from the virtual impactor (3) extends through filtering inner cavity
(10) in；
The shape of virtual impactor (3) main body is the first cylinder, is formed by the docking of upper and lower two parts, the first cylinder
Basal diameter 101.8mm, high 79mm；
The shape of filtering inner cavity (10) is the second cylinder, the basal diameter 85.3mm, high 67mm of the second cylinder；
Taper input pipe (9) is formed by connecting by the first cylindrical tube and conical tube；First cylindrical tube interior diameter 20.3mm, outside
Diameter 25.3mm, high 32.2mm；Conical tube bottom surface interior diameter 20.3mm, overall diameter 25.3mm, in conical tube upper bottom surface
Diameter 5mm, overall diameter 8mm, the high 34.2mm of conical tube；
Output straight tube (11) is the second cylindrical tube, the second cylindrical tube interior diameter 5mm, overall diameter 9mm；Export straight tube (11)
The distance between conical pipe upper bottom surface of bottom surface and taper input pipe (9) is 6mm；
Air force interface (12) is arranged on the top surface of virtual impactor (3), the interior diameter with filtering inner cavity (10) junction
For 15mm；
The bottom surface of the conical tube of taper input pipe (9) is overlapped with filtering the bottom surface of inner cavity (10)；Taper input pipe (9)
The overlapping of axles of the axis of first cylindrical tube and conical tube, the axis for filtering inner cavity (10) and output straight tube (11).
2. gas fine particle enrichment method device, it is characterised in that the device include humidifier (1), cooling tube (2),
Virtual impactor (3), counter-flow drier (4), the first aspiration pump (7) and the second aspiration pump (8) according to claim 1,
The cooling tube (2) is connected with humidifier (1) and virtual impactor (3) respectively, the virtual impactor (3) also with adverse current
Drier (4) and the first aspiration pump (7) connection, the counter-flow drier (4) is also connected with the second aspiration pump (8), described
Gas input port is additionally provided with humidifier (1), the counter-flow drier is additionally provided with gas delivery port on (4).
3. the apparatus of claim 2, it is characterised in that the taper input pipe (9) is connected with cooling tube (2),
The output straight tube (11) is connected with counter-flow drier (4), and the air force interface (12) is used for the first aspiration pump
(7) connected with filtering inner cavity (10).
4. the apparatus of claim 2, it is characterised in that the cooling tube (2) has inside and outside two chambers, and exocoel leads to
Liquid circulation is crossed to cool down inner cavity；The device further includes constant temperature refrigeration sink (5), constant temperature refrigeration sink (5)
Input port is connected with lower interface of the delivery outlet respectively with cooling tube (2) exocoel with upper interface.
5. the apparatus of claim 2, it is characterised in that be filled with dry particle in the counter-flow drier (4).
6. the apparatus of claim 2, it is characterised in that the device further includes particulate matter mixing chamber (6), described
Counter-flow drier (4) be connected by particulate matter mixing chamber (6) with the second aspiration pump (8), will be located on counter-flow drier (4)
Gas delivery port, which changes, to be located on particulate matter mixing chamber (6).
7. device according to claim 6, it is characterised in that the cooling tube (2), virtual impactor (3), adverse current are dry
Dry device (4) and the first aspiration pump (7) are multiple, and multiple counter-flow driers (4) are connected with same particulate matter mixing chamber (6) respectively.
8. gas fine particle concentrated method, including：
Gas containing particulate matter is mixed with the water vapour higher than environment temperature；
Mixed gas flows from bottom to top, is cooled in flow process；
Mixed gas after cooling is thick to produce from taper input pipe (9) according to claim 1 input virtual impactor (3)
Thing is exported from output straight tube (11)；
Dry crude product.
9. according to the method described in claim 8, it is characterized in that, the method further includes：After crude product drying, in basis
Mixing in particulate matter mixing chamber (6) described in claim 6.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| HUE064204T2 (en) * | 2018-08-28 | 2024-02-28 | Swisens Ag | Measuring system for examining concentrated aerosol particles in the gas phase |
| CN111855376B (en) * | 2020-07-26 | 2024-04-19 | 复旦大学 | Device and method for measuring online trace water-soluble ions by collecting atmospheric fine particles |
| CN111855375B (en) * | 2020-07-26 | 2024-04-23 | 复旦大学 | Online atmospheric fine particulate matter concentrating and collecting device and method |
| CN111855374A (en) * | 2020-07-26 | 2020-10-30 | 复旦大学 | Medium-flow atmospheric fine particulate concentration device and method |
| CN112763653A (en) * | 2020-12-14 | 2021-05-07 | 复旦大学 | Device and method for collecting atmospheric fine particulate concentrated solution on line and measuring total toxicity |
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