CN109752232A - Gas-solid separating device - Google Patents
Gas-solid separating device Download PDFInfo
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- CN109752232A CN109752232A CN201711078581.0A CN201711078581A CN109752232A CN 109752232 A CN109752232 A CN 109752232A CN 201711078581 A CN201711078581 A CN 201711078581A CN 109752232 A CN109752232 A CN 109752232A
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- gas
- tap hole
- sample introduction
- sample
- concentrate container
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- 239000007787 solid Substances 0.000 title claims abstract description 30
- 239000012141 concentrate Substances 0.000 claims abstract description 45
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims description 7
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 abstract description 37
- 239000013618 particulate matter Substances 0.000 abstract description 17
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Abstract
The present invention relates to a kind of gas-solid separating devices, it includes concentrate container, sample introduction mechanism and deflector, wherein concentrate container is equipped with atmospheric pressure cavity and pumping column, sample introduction mechanism is equipped with sample intake passage, metering hole and the tap hole being sequentially communicated, the aperture of metering hole is less than the aperture of tap hole, and the size of tap hole is gradually increased in one end close to atmospheric pressure cavity；Deflector has flow-guiding channel.By setting can mutually matched metering hole, tap hole, flow-guiding channel and pumping column, when the vacuum sample introduction interface of above-mentioned gas-solid separating device and analytical equipment is connected, under conditions of using conventional vacuum load, the most of gas flowed out from tap hole is pumped, particulate matter and partial gas then enter after flow-guiding channel in the vacuum chamber for flying into analytical equipment again, it is capable of increasing aerosol sample introduction flow on the whole, the concentration to aerosol is realized, this is beneficial to carry out the sample introduction of aerosol and detection work under low concentration.
Description
Technical field
The present invention relates to analysis Instrument equipment fields, more particularly to a kind of gas-solid separating device.
Background technique
Aerosol is to be dispersed by solid or liquid fine particle and be suspended in the colloidal dispersion system formed in gas medium.Gas
Colloidal sol has complicated physicochemical property, there is critically important influence to weather, environment and human health.Therefore gas is understood in depth
Physicochemical property, source characteristic of colloidal sol etc. are had great importance for being promoted the well-being of mankind using aerosol.However, for aerosol
Analysis be always scientific research hot and difficult issue, wherein analytical equipment be the key that research aerosol.
Many analysis instruments need to carry out under vacuum conditions when carrying out aerosol analysis, and need particulate
It is introduced into vacuum environment from atmospheric pressure, a series for the treatment of processes, including grain then is carried out to the aerosol for introducing evacuated interior
The processes such as son focusing, collection, ionization, desorption.It is therefore desirable to which aerosol is introduced vacuum environment using certain technological means
In, and by gas and particulate separation.
Conventional instrument is to provide vacuum environment for gas and gas using thin-walled circular hole piece direct injected, and with a vacuum pump
Colloidal sol separation, this is a kind of method of common particulate matter vacuum sample introduction.But it is set since general vacuum analytical equipment requires
Standby inside reaches certain vacuum values, that is, due to the limitation of vacuum loading, sample holes (can also be " critical hole ")
Size can not be very big.Especially under mass spectral analysis environment, small-sized, the general sample introduction flow of the sample holes of thin-walled circular hole piece
It is limited in 100mL/min or so.Therefore the sample volume of the aerosol in the unit time is limited.It is past under the lower environment of concentration
Sample volume within the unit time is too low, will be unfavorable for carrying out the sample introduction of aerosol and detection work under low concentration.
Summary of the invention
Based on this, it is necessary to provide that a kind of to be capable of increasing gas when not influencing the vacuum loading of vacuum analytical equipment molten
The gas-solid separating device of glue sample introduction flow.
A kind of gas-solid separating device, comprising:
Concentrate container, the concentrate container have atmospheric pressure cavity, and the concentrate container is equipped with to be connected with the atmospheric pressure cavity
Pumping column, the pumping column is for connecting air extractor；
Sample introduction mechanism, the sample introduction mechanism are equipped with sample intake passage, metering hole and the tap hole being sequentially communicated, the current limliting
The aperture in hole is less than the aperture of the tap hole, and the sample introduction mechanism is set on the concentrate container, and the tap hole and institute
It states atmospheric pressure cavity to be connected, the size of the tap hole is gradually increased in one end close to the atmospheric pressure cavity；And
Deflector, the deflector have flow-guiding channel, and the deflector is set on the concentrate container, described
The sample introduction end of deflector is protruded into the atmospheric pressure cavity and stretches to end where the air stream outlet in the tap hole, and described leads
Flow mechanism sample introduction end and the tap hole hole wall between have pumping gap, and the flow-guiding channel, the tap hole and
The metering hole is coaxial；
The deflector and/or the concentrate container are for connecting vacuum sample introduction interface.
The sample introduction mechanism includes current divider, sample injector and constrictor in one of the embodiments,；
The current divider has mounting groove and the tap hole positioned at the installation trench bottom, and the mounting groove protrudes into institute
It states in atmospheric pressure cavity and the inner wall of the side wall and the atmospheric pressure cavity of the mounting groove abuts against；
The sample injector has an inlet channel, the sample injector be mounted in the mounting groove and with the mounting groove
Inner sidewall abut against；
The constrictor be equipped with the metering hole, the constrictor be set to the mounting groove in and be located at the current divider and
The metering hole is set to be connected respectively with the sample intake passage and the tap hole between sample injector.
The aperture of the metering hole is not less than 0.2mm in one of the embodiments,.
The current divider is equipped with towards the flange outside the mounting groove in one of the embodiments, the flange with
The wall of the concentrate container abuts against.
The sample injector has step structure in one of the embodiments, and the sample injector is mounted on the current divider
The mounting groove in, and the step of the sample injector and the flange of the current divider are flush.
The gas-solid separating device further includes fixed plate in one of the embodiments, and the fixed plate is set in described
On sample injector, the fixed plate is connect by fastener with the current divider and the concentrate container.
The bleeding point of the pumping column is close to end where the air stream outlet of the tap hole in one of the embodiments,；
And/or
The pumping column has multiple, and multiple pumping columns are located on the side wall of the concentrate container, multiple pumpings
Column is symmetrical set along the axis of the tap hole.
The concentrate container has outlet, end where the outlet of the concentrate container in one of the embodiments,
Equipped with interior step, the sample outlet end portion of the deflector is connected on the interior step of the concentrate container.
The deflector is separation cone in one of the embodiments,.
The outer profile of the separation cone is streamlined in one of the embodiments,.
Above-mentioned gas-solid separating device includes concentrate container, sample introduction mechanism and deflector, and wherein concentrate container is equipped with
The pumping column being connected with atmospheric pressure cavity, sample introduction mechanism are equipped with sample intake passage, metering hole and the tap hole being sequentially communicated, metering hole
Aperture be less than the aperture of tap hole so that the particulate matter in aerosol sample is concentrated, the size of tap hole is in close atmospheric pressure cavity
One end is gradually increased so that fraction is smoothly taken away and do not influence the flow direction of particle；Deflector is set on concentrate container,
Deflector has flow-guiding channel to meet the vacuum loading requirement for not influencing vacuum analytical equipment, and makes into flow-guiding channel
Aerosol becomes laminar condition from turbulence state, is convenient for subsequent focusing.It being capable of mutually matched metering hole, shunting by setting
Hole, flow-guiding channel and pumping column are being adopted when connecting the vacuum sample introduction interface of above-mentioned gas-solid separating device and analytical equipment
Under conditions of being loaded with conventional vacuum, under the promotion of draught head, since gas molecule is different with the inertia of particulate matter, from shunting
Most of gas of hole outflow will be pumped, and particulate matter and partial gas fly into analytical equipment after then entering flow-guiding channel again
In vacuum chamber, it is capable of increasing aerosol sample introduction flow on the whole, realizes the concentration to aerosol, this is beneficial to carry out low dense
Spend sample introduction and the detection work of lower aerosol.
Further, it is equipped with the constrictor being conveniently replaceable in the sample introduction mechanism of above-mentioned gas-solid separating device, passes through constrictor
Aperture adjustment and matched with extraction flow, the sample introduction flow of aerosol can be made to increase, but can still guarantee subsequent
Gas sampling amount into analytical equipment remains unchanged, and increases particle concentration, improves the test accuracy of detection structure.
Further, the deflector of above-mentioned gas-solid separating device preferably separates cone, separates the outer profile of cone in streamline
Type is conducive to reduce interference of the air-flow to particulate matter during extraction flow, can be realized the beam focusing effect to aerosol.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the gas-solid separating device of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Incorporated by reference to Fig. 1, the gas-solid separating device 10 of an embodiment, including concentrate container 100, sample introduction mechanism 200 and
Deflector 300.
Concentrate container 100 has atmospheric pressure cavity 101, and concentrate container 100 is equipped with the pumping column being connected with atmospheric pressure cavity 101
110.Pumping column 110 will flow into gas from the sample intake passage, metering hole, tap hole of sample introduction mechanism 200 for connecting air extractor
The gas of pressure chamber 101 is taken away, to realize the concentration to the particulate matter of aerosol.
Specifically, concentrate container 100 is in hollow column structure on the whole, i.e. concentrate container 100 has 101 He of atmospheric pressure cavity
The injection port and outlet being connected with atmospheric pressure cavity 101.
Preferably, the bleeding point of column 110 is evacuated close to end where the air stream outlet of tap hole, in time will be from tap hole
Most of gas of outflow is taken away.Preferably, the one end for being evacuated column 110 is connect with concentrate container 100 by taper thread, is improved close
Feng Xing, and it is easy to disassemble, and the other end of pumping column 110 is connect by exhaust pipe with air extractors such as air-sucking mechanical pumps.Meanwhile
Settable flow control valve on exhaust pipe, to regulate and control the vacuum degree in atmospheric pressure cavity 101, to meet to the true of subsequent analysis instrument
The requirement that the operating pressure of empty set system does not have an impact.
Further, it being evacuated there are two columns 110, two pumping columns 100 are opposite to be located on the side wall of concentrate container 100, with
Prevent the influence of air flow direction and mass flow discrepancy to the flow direction of the particulate matter of the aerosol entered in flow-guiding channel.
In other embodiments, pumping column 110 can have multiple, such as three, four, six etc., multiple pumping columns
110 are located on the side wall of concentrate container 100, and multiple pumping columns 110 are symmetrical set along the axis of tap hole, with equably real
The air-flow now flowed out from tap hole is taken away, but reduces entrained solid particles object in the air-flow taken away to the greatest extent.
Further, concentrate container 100 has outlet, end where the outlet of concentrate container 100 be equipped with interior step and
Interconnecting piece.The sample outlet end portion of deflector 300 is connected on the interior step of concentrate container 100, to improve to the close of atmospheric pressure cavity 101
Feng Xing, while keeping whole apparatus structure more compact.The interconnecting piece of concentrate container 100 is for connecting vacuum sample introduction interface.
In the present embodiment, it is successively arranged the sample intake passage, metering hole and tap hole of connection on sample introduction mechanism 200, limits
The aperture of discharge orifice is less than the aperture of tap hole so that the particulate matter in aerosol sample is concentrated.Sample introduction mechanism 200, which is set to concentration, to be held
On device 100, and tap hole is connected with atmospheric pressure cavity 101, and the size of tap hole is gradually increased in one end close to atmospheric pressure cavity 101,
It is preferred that arc-shaped expansion shape, can cooperate with air extractor and realize the focusing to particulate matter and the shunting to gas, make part gas
Stream is smoothly taken and is not influenced away the flow direction of particle.Sample introduction mechanism 200 is set to the injection port place end of concentrate container 100 and at this
End sealing injection port.
In the present embodiment, sample introduction mechanism 200 includes current divider 210, sample injector 220 and constrictor 230.Sample introduction mechanism
200 are set to the injection port place end of concentrate container 100 and seal injection port at the end.
Current divider 210 has mounting groove and the tap hole positioned at installation trench bottom, and mounting groove protrudes into atmospheric pressure cavity 101 and pacifies
The side wall of tankage and the inner wall of atmospheric pressure cavity 101 abut against.Current divider 210 is equipped with towards the flange outside mounting groove, flange with it is dense
The wall of capacity reducing device 100 abuts against, in order to further seal whole system by fasteners such as screws.
Sample injector 220 has inlet channel, and sample injector 220 is mounted in mounting groove and offsets with the inner sidewall of mounting groove
It connects.Preferably, sample injector 220 has step structure, and sample injector 220 is mounted in the mounting groove of current divider 210, and sample injector
The flange of 220 step and current divider 210 is flush, so that whole device is compact-sized, and convenient for sample injector 220 and shunting
Device 210 is sealed and fixes.
Constrictor 230 is equipped with metering hole, and constrictor 230 is set in the mounting groove of current divider 210 and is located at 210 He of current divider
Between sample injector 220, and metering hole is connected with sample intake passage and tap hole respectively.
Preferably, the aperture of the metering hole on constrictor 230 is less than the internal diameter of sample intake passage and the aperture of tap hole.Into one
Step, the aperture of the metering hole on constrictor 230 is not less than 0.2mm, it is highly preferred that the aperture of metering hole is 0.2~0.5mm,
Such as can be 0.2mm, 0.3mm, 0.4mm or 0.45mm, with further satisfaction to the behaviour of the vacuum system of subsequent analysis instrument
In the case of making the requirement that pressure does not have an impact, sample introduction flow can be increased, and achieve the effect that for low concentration aerosol to be concentrated.
Further, sample introduction mechanism 200 further includes fixed plate 240.Fixed plate 240 is set on sample injector 220, fixed plate
240 are connect by fasteners such as screws with the wall of current divider 210 and concentrate container 100, are assembled by removably mode
Model machine structure 200 is conveniently replaceable the constrictor 230 in different metering hole apertures.For example, when being greater than 0.2mm using metering hole aperture, energy
The sample introduction efficiency for enough significantly improving the aerosol greater than 3 μm of particulate matters is conducive to the detection and research of large particle, and has simultaneously
Conducive to the sample introduction concentration realized to aerosol under low concentration.
For another example, the sample introduction flow of aerosol traditionally is 100mL/min, and the gas solid separation of present embodiment is used to fill
When setting 10 and connecting with the vacuum sample introduction interface of analytical equipment, and when metering hole aperture is greater than 0.2mm, aerosol can be with 500mL/
The flow of min passes through constrictor 230, reaches or approaches velocity of sound under the promotion of pressure difference, due to gas molecule and particulate matter
Inertia is different, and most of gas is evacuated by air extractor, and pumping speed may be configured as 400mL/min, and residual gas is then with 100mL/
The flow and one superhigh speed of particulate matter of min passes through flow-guiding channel and flies into the vacuum chamber of analytical equipment, realizes to aerosol
Sample introduction concentration.
In the present embodiment, deflector 300 has flow-guiding channel, it is preferable that the radial dimension of flow-guiding channel is gradually
Increase, the sample water conservancy diversion for will not be evacuated in tap hole enters in vacuum sample introduction interface, and makes to enter in flow-guiding channel
Aerosol becomes laminar condition from turbulence state, is convenient for subsequent focusing boundling.Deflector 300 is set on concentrate container 100,
And the sample introduction end of deflector 300 is protruded into atmospheric pressure cavity 101 and stretches to end where the air stream outlet in tap hole, deflector
There is pumping gap, and flow-guiding channel, metering hole, tap hole and sample intake passage between 300 sample introduction end and the hole wall of tap hole
Coaxially, to make full use of the inertia of particulate matter, guarantee that particulate matter enters in flow-guiding channel.
Deflector 300 preferably separates cone.Further, the outer profile for separating cone is streamlined, is conducive to be evacuated
Reduce interference of the air-flow to particulate matter during stream, can be realized the beam focusing effect to aerosol.
The gas-solid separating device 10 of above embodiment being capable of mutually matched metering hole, tap hole, water conservancy diversion by setting
Channel and pumping column, when gas-solid separating device 10 to be connect with the vacuum sample introduction interface of analytical equipment, using conventional true
Under conditions of idling carries, under the promotion of draught head, since gas molecule is different with the inertia of particulate matter, flowed out from tap hole
Most of gas will be taken away by air extractor, and particulate matter and partial gas fly into analytical equipment after then entering flow-guiding channel again
In vacuum chamber, it is capable of increasing aerosol sample introduction flow on the whole, realizes the concentration to aerosol, this is beneficial to carry out low dense
Spend sample introduction and the detection work of lower aerosol.Meanwhile by the aperture adjustment of constrictor 230 and with the extraction flow of air extractor
Amount matches, and the sample introduction flow of aerosol can be made to increase, but still can in the case where the vacuum loading of not impact analysis equipment
Enough guarantee that the gas sampling amount of subsequent analysis equipment remains unchanged, and increase particle concentration, improves the test of detection structure
Accuracy.
In the present embodiment, deflector 300 and concentrate container 100 are for connecting vacuum sample introduction interface.
Aerosol sampling technique is used as using gas-solid separating device 10, can be widely applied to aerosol analysis instrument, such as
Individual particle aerosol mass spectrometer etc. also can be applied to the emerging fields such as micro electronmechanical manufacture, 3D printing.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of gas-solid separating device characterized by comprising
Concentrate container, the concentrate container have atmospheric pressure cavity, and the concentrate container is equipped with the pumping being connected with the atmospheric pressure cavity
Air column, the pumping column is for connecting air extractor；
Sample introduction mechanism, the sample introduction mechanism are equipped with sample intake passage, metering hole and the tap hole being sequentially communicated, the metering hole
Aperture is less than the aperture of the tap hole, and the sample introduction mechanism is set on the concentrate container, and the tap hole and the gas
Pressure chamber is connected, and the size of the tap hole is gradually increased in one end close to the atmospheric pressure cavity；And
Deflector, the deflector have flow-guiding channel, and the deflector is set on the concentrate container, the water conservancy diversion
End where the air stream outlet in the tap hole, and the flow guiding machine are protruded into the atmospheric pressure cavity and stretched in the sample introduction end of mechanism
There is pumping gap, and the flow-guiding channel, the tap hole and described between the sample introduction end of structure and the hole wall of the tap hole
Metering hole is coaxial；
The deflector and/or the concentrate container are for connecting vacuum sample introduction interface.
2. gas-solid separating device according to claim 1, which is characterized in that the sample introduction mechanism includes current divider, sample introduction
Device and constrictor；
The current divider has mounting groove and the tap hole positioned at the installation trench bottom, and the mounting groove protrudes into the gas
The inner wall of the side wall and the atmospheric pressure cavity of the intracavitary and described mounting groove is pressed to abut against；
The sample injector has an inlet channel, the sample injector be mounted in the mounting groove and in the mounting groove
Side wall abuts against；
The constrictor is equipped with the metering hole, and the constrictor is set in the mounting groove and is located at the current divider and sample introduction
The metering hole is set to be connected respectively with the sample intake passage and the tap hole between device.
3. gas-solid separating device according to claim 2, which is characterized in that the aperture of the metering hole is not less than 0.2mm.
4. gas-solid separating device according to claim 2, which is characterized in that the current divider is equipped with towards the mounting groove
External flange, the wall of the flange and the concentrate container abut against.
5. gas-solid separating device according to claim 4, which is characterized in that the sample injector has step structure, described
Sample injector is mounted in the mounting groove of the current divider, and the flange of the step of the sample injector and the current divider
It is flush.
6. gas-solid separating device according to claim 5, which is characterized in that further include fixed plate, the fixed plate is arranged
On the sample injector, the fixed plate is connect by fastener with the current divider and the concentrate container.
7. gas-solid separating device according to any one of claims 1 to 6, which is characterized in that the bleeding point of the pumping column
Close to end where the air stream outlet of the tap hole；And/or
The pumping column has multiple, and multiple pumping columns are located on the side wall of the concentrate container, multiple pumping column edges
The axis of the tap hole is symmetrical set.
8. gas-solid separating device according to any one of claims 1 to 6, which is characterized in that the concentrate container has
Sample mouth, end is equipped with interior step where the outlet of the concentrate container, and the sample outlet end portion of the deflector is connected to described dense
On the interior step of capacity reducing device.
9. gas-solid separating device according to any one of claims 1 to 6, which is characterized in that the deflector is separation
Cone.
10. gas-solid separating device according to claim 9, which is characterized in that the outer profile of the separation cone is streamlined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711078581.0A CN109752232B (en) | 2017-11-06 | 2017-11-06 | Gas-solid separation device |
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| CN201711078581.0A CN109752232B (en) | 2017-11-06 | 2017-11-06 | Gas-solid separation device |
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| CN109752232B CN109752232B (en) | 2023-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113567194A (en) * | 2021-07-15 | 2021-10-29 | 广东环凯生物科技有限公司 | Concentrated sampling head and concentrated sample thief of microorganism aerosol are gathered to cyclone |
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