CN107138277B - The unipolarity particulate matter charge device and method of integrated free ion trapping function - Google Patents
The unipolarity particulate matter charge device and method of integrated free ion trapping function Download PDFInfo
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- CN107138277B CN107138277B CN201710262990.XA CN201710262990A CN107138277B CN 107138277 B CN107138277 B CN 107138277B CN 201710262990 A CN201710262990 A CN 201710262990A CN 107138277 B CN107138277 B CN 107138277B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
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Abstract
The present invention relates to unipolarity particulate matter charge devices and method that integrated free ion traps function.Device includes outer chamber, inner chamber body, spray point, high-field electrode and collector electrode.Outer chamber includes outer chamber protecgulum, outer chamber rear cover and the first cavity.Particulate matter import is offered on outer chamber protecgulum.It is covered after outer chamber and offers the outlet of electrically charged particle object.Inner chamber body includes inner chamber body protecgulum, inner chamber body rear cover and the second cavity.Ion jet port is offered on inner chamber body protecgulum.It is covered after inner chamber body equipped with the pure air import being connected with the second cavity.Spray point, particulate matter import, ion jet port and electrically charged particle object outlet coaxial arrangement.Region between particulate matter import and ion jet port is the charged region of particulate matter.Region between first cavity and the second cavity is free ion capture zone.The present invention can solve the deficiencies in the prior art, realize the efficient charged of Atmospheric particulates.
Description
Technical field
The present invention relates to the charged technical fields of Atmospheric particulates, and in particular to a kind of list of integrated free ion trapping function
Polar particulate object charge device and method.
Background technology
In the charged technical field of Atmospheric particulates, the deflection of particulate matter is usually realized using the electromobility of particulate matter
Separation, the final measurement for realizing particle concentration.And the electromobility that characterize particulate matter then need first to particle carry out it is charged,
Hereafter it could be detached, be detected into electromigration pipe.It is only accurate to measure the ability such as inside and outside charged efficiency and loss efficiency
Complete the inverting of particle concentration.Therefore, it is most basic most important part in particulate measurement system that particulate matter is charged.
In Atmospheric particulates charged process, particulate matter can be by being exposed to two class ion ring of unipolarity or bipolarity
Realize that particulate matter is charged in border.Bipolar charging device, frequently with210Po、241Am、85The radioisotopic decaying such as Kr carries out
It is charged.In various bipolar chargings, neutrophil granule can become charged particle by the mutual collision of particle and ion.Due to
Radioactive isotope, which has human body, to be endangered, its application in gasoloid field is limited.Based on this, researcher more pays close attention to
Particulate matter is set to charge by the way of corona discharge.What existing charge device typically directly ionized is air, is easy in this way
Spray point is polluted, guiding discharge needle has particle deposition, influences the ionizing efficiency of spray point, needs periodic cleaning that cannot make for a long time
With；In addition to this, free ion is not removed in device, can be had in this way to the accuracy of the measurement result of particulate matter carrying capacity
It influences.Therefore, it is necessary to design it is a kind of can be used for a long time and can by Atmospheric particulates charge device that free ion removes and
Method.
Invention content
The purpose of the present invention is to provide a kind of integrated free ion trap function unipolarity particulate matter charge device and
Method, the charge device and method can solve the deficiencies in the prior art, realize the efficient charged of Atmospheric particulates.
To achieve the above object, present invention employs following technical schemes：
A kind of unipolarity particulate matter charge device of integrated free ion trapping function, including outer chamber, embedded setting exist
Inner chamber body inside outer chamber, the spray point in inner chamber body, sequentially pass through after outer chamber and inner chamber body with spray point phase
High-field electrode even and the collector electrode being mounted on after outer chamber in inner chamber body.
The outer chamber includes outer chamber protecgulum, the outer chamber rear cover being connected with cover back-end before outer chamber and by outer chamber
The first cavity that protecgulum is surrounded with outer chamber rear cover；The particulate matter being connected with the first cavity is offered on the outer chamber protecgulum
Import covers the electrically charged particle object outlet for offering and being connected with the first cavity after outer chamber.
The inner chamber body includes inner chamber body protecgulum, the inner chamber body rear cover being connected with cover back-end before inner chamber body and by inner chamber body
The second cavity that protecgulum is surrounded with inner chamber body rear cover；Ion jet port is offered on the inner chamber body protecgulum；After the inner chamber body
It covers equipped with the pure air import being connected with the second cavity, and the pure air import is pierced by from outer chamber rear cover.
The spray point, particulate matter import, ion jet port and electrically charged particle object outlet coaxial arrangement.
Region between the particulate matter import and ion jet port is the charged region of particulate matter；First cavity and
Region between two cavitys is free ion capture zone.
Further, it is arranged with the first insulating sleeve on the high-field electrode；The spray point passes through the second insulating sleeve
It is covered after inner chamber body；Third insulating sleeve is arranged on the collector electrode.
Further, the spray point uses tungsten material, and the tip diameter of spray point is less than 2 μm, and length of needlepoint is less than
10mm, the distance between needle point and ion jet port center are 5mm.
Further, the outer chamber protecgulum and inner chamber body protecgulum are arc surface.
Further, after the particulate matter import, ion jet port, the outlet of electrically charged particle object, inner chamber body protecgulum, inner chamber body
Lid, outer chamber protecgulum and outer chamber rear cover are all made of stainless steel.
Further, the high-field electrode and collector electrode are all made of copper material.
Further, the pure air import includes symmetrically arranged first pure air import and the second pure air
Import；The pure air import uses polyether-ether-ketone material.
Further, first, second, and third insulating sleeve is all made of polyether-ether-ketone material.
The invention further relates to a kind of methods of above-mentioned charge device, and this approach includes the following steps：
（1）Pure air is entered by the first pure air import and the second pure air import in the second cavity；
（2）High pressure is accessed into the end of high-field electrode, point discharge occurs for the tip of spray point, to make to enter second
Pure air in cavity ionizes, and generates a large amount of ion；
（3）Under the promotion of pure air stream, the ion in the second cavity enters particulate matter lotus by ion jet port
Electric region；
（4）Atmospheric particulates enter the charged region of particulate matter by particulate matter import；
（5）In the charged region of particulate matter, the Atmospheric particulates in ion and sample gas collide, and ion is attached to air
On particulate matter, Atmospheric particulates is made to charge, to obtain charged particle thing；Under the action of sample gas air-flow, charged particle thing and
Remaining is not attached to the ion on Atmospheric particulates and enters free ion capture zone；
（6）Collector electrode is accessed into trapping voltage, forms trapping electric field in free ion capture zone, in trapping electric field
Under the action of, remaining is not attached to the ion on Atmospheric particulates and is collected by the inner wall of inner chamber body protecgulum and inner chamber body rear cover；
Under the electric field force effect of internal gas flow and trapping electric field, charged particle thing is exported by electrically charged particle object to flow out.The internal gas flow
Include the pure air stream entered from the first pure air import and the second pure air import and enters from particulate matter import
Air-flow.
Compared to the prior art, the invention has the advantages that：
（1）Particulate matter charge device of the present invention has the characteristics that simple in structure, easy to operate and outer by being arranged
Cavity and the embedded inner chamber body being arranged in outer chamber, Atmospheric particulates and spray point are kept apart, and spray point is made to be in clean
In net environment, avoids spray point contaminated, ensure that the stability of electric discharge, it is ensured that spray point can be with long-term work.
（2）Particulate matter charge device of the present invention is integrated with free ion trapping function, will be in charged particle thing
Free ion removes, and avoids interference of the free ion to the true charged measurements of electrically charged particle object.
（3）Particulate matter charge device of the present invention is designed to free ion（It is not attached on Atmospheric particulates
Ion）It collides from opposite direction with Atmospheric particulates, the chance of ion and particulate matter collision can be increased, improve particle
The charged efficiency of object.
Description of the drawings
Fig. 1 is the structural schematic diagram of unipolarity particulate matter charge device in the present invention.
Wherein：
11, particulate matter import, 12, outer chamber protecgulum, 13, inner chamber body protecgulum, 14, outer chamber rear cover, 15, first is clean empty
Gas import, 16, third insulating sleeve, 17, collector electrode, 18, the outlet of electrically charged particle object, the 19, second insulating sleeve, 20, first
Insulating sleeve, 21, high-field electrode, 22, spray point, the 23, second pure air import, 24, inner chamber body rear cover, 25, ion injection
Mouthful.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
A kind of unipolarity particulate matter charge device of integrated free ion trapping function as shown in Figure 1, including outer chamber,
Insertion is arranged in the inner chamber body of outer inside cavity, the spray point 22 in inner chamber body, sequentially passes through outer chamber and inner chamber body
The high-field electrode 21 being connected afterwards with spray point 22 and the collector electrode 17 being mounted on after outer chamber in inner chamber body.High-voltage electricity
One end of pole 21 connects spray point, another termination high voltage power supply.Due to will produce many ions when electric discharge needle-discharging, these ions
In, only fraction is contacted with particulate matter, is attached on particulate matter, remaining most of ion is also all free ion.In order to
It avoids impacting particulate matter electrification measurements, these free ions need to remove, and therefore, the present invention is using trapping
Electrode gets rid of free ion.Collector electrode is in contact after passing through outer chamber with the inner chamber body rear cover of inner chamber body.
The outer chamber include outer chamber protecgulum 12, the outer chamber rear cover 14 being connected with 12 rear end screw thread of outer chamber protecgulum with
And the first cavity surrounded by outer chamber protecgulum 12 and outer chamber rear cover 14；It is offered on the outer chamber protecgulum 12 and the first sky
The particulate matter import 11 that chamber is connected offers the electrically charged particle object outlet being connected with the first cavity on outer chamber rear cover 14
18。
The inner chamber body include inner chamber body protecgulum 13, the inner chamber body rear cover 24 being connected with 13 rear end screw thread of inner chamber body protecgulum with
And the second cavity surrounded by inner chamber body protecgulum 13 and inner chamber body rear cover 24.Ion injection is offered on the inner chamber body protecgulum 13
Mouth 25；Ion jet port 25 is the cylindrical hole of a diameter of 1.5mm.The inner chamber body rear cover 24 is equipped with to be connected with the second cavity
Pure air import, and the pure air import is pierced by from outer chamber rear cover 14.
The present invention is made up of the outer chamber protecgulum for setting outer chamber to by being threadedly coupled with outer chamber rear cover, by inner cavity
Body is set as the inner chamber body protecgulum by being threadedly coupled and is constituted with inner chamber body rear cover, has the characteristics that easily manufactured, installation is convenient,
In installation process, outer chamber protecgulum can be removed, be convenient for the installation of inner chamber body.
The spray point 22,18 coaxial arrangement of particulate matter import 11, ion jet port 25 and the outlet of electrically charged particle object, in this way
It can ensure that ion and particulate matter are collided in rectilinear direction, increase the chance of collision.
Region between the particulate matter import 11 and ion jet port 25 is the charged region of particulate matter.First cavity
Annular region between the second cavity is free ion capture zone.
Further, the first insulating sleeve 20 is arranged on the high-field electrode 21；The spray point passes through the second insulation
19, set is mounted on inner chamber body rear cover 24；Third insulating sleeve 16 is arranged on the collector electrode 17.First insulating sleeve
For high-field electrode and outer chamber rear cover, inner chamber body rear cover to be separated；Second insulating sleeve is used for inner chamber body rear cover and electric discharge
Needle separates；Third insulating sleeve separates outer chamber rear cover after collector electrode.Three insulating sleeves play the role of insulation.
Further, the spray point 22 uses tungsten material, and the tip diameter of spray point 22 is less than 2 μm, length of needlepoint
Less than 10mm, the distance between needle point and ion jet port center are 5mm.According to experimental result, the parameter of spray point is carried out
Setting in this way can be conducive to the needle-discharging that discharges, it is ensured that the stability of discharge current.
Further, the outer chamber protecgulum 12 and inner chamber body protecgulum 13 are arc surface.It is designed by fluid emulation, this
Sample is more advantageous to the collection of free ion, and charged particle thing will not be collected, and can be passed freely through.
Further, the outer chamber rear cover 14 and the inner chamber body rear cover 24 are designed by fluid emulation, are more had in this way
Conducive to the collection of free ion, charged particle thing will not be collected, and can be passed freely through.
Further, due to particulate matter component complexity, the ingredient also corroded is easy pollution cavity, so the particle
Object import 11, ion jet port 25, electrically charged particle object outlet 18, inner chamber body protecgulum 13, inner chamber body rear cover 24, outer chamber protecgulum 12
It is all made of stainless steel with outer chamber rear cover 14, prevents rust corrosion, it is easy to clean.
Further, the high-field electrode 21 and collector electrode 17 are all made of copper material.Copper material is easier conduction.
Further, the pure air import includes that symmetrically arranged first pure air import 15 and second is clean empty
Gas import 23；The pure air import uses polyether-ether-ketone material.
Further, first, second, and third insulating sleeve is all made of polyether-ether-ketone material.Polyether-ether-ketone material is exhausted
Edge is high pressure resistant.
The invention further relates to a kind of methods of above-mentioned charge device, and this approach includes the following steps：
（1）Pure air is entered by the first pure air import and the second pure air import in the second cavity；
（2）3 kilovolts of high pressures are accessed into the end of high-field electrode, point discharge occurs for the tip of spray point, to make entrance
It is ionized to the pure air in the second cavity, generates a large amount of ion；
（3）Under the promotion of pure air stream, the ion in the second cavity enters particulate matter lotus by ion jet port
Electric region；
（4）Atmospheric particulates enter the charged region of particulate matter by particulate matter import；
（5）In the charged region of particulate matter, the Atmospheric particulates in ion and sample gas are touched with the opposite direction of motion
It hits, ion is attached on Atmospheric particulates, and Atmospheric particulates is made to charge, to obtain charged particle thing；In the work of sample gas air-flow
Under, charged particle thing is not attached to the ion on Atmospheric particulates with remaining and enters free ion capture zone；
（6）Collector electrode access 25V is trapped into voltage, trapping electric field is formed in free ion capture zone, is trapping
Under the action of electric field, remaining is not attached to the ion on Atmospheric particulates and is received by the inner wall of inner chamber body protecgulum and inner chamber body rear cover
Collection；Under the electric field force effect of internal gas flow and trapping electric field, charged particle thing is exported by electrically charged particle object to flow out.The inside
Air-flow includes the pure air stream entered from the first pure air import and the second pure air import and from particulate matter import
The air-flow of entrance.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (9)
1. a kind of unipolarity particulate matter charge device of integrated free ion trapping function, it is characterised in that：Including outer chamber, embedding
Enter to be arranged the inner chamber body in outer inside cavity, the spray point in inner chamber body, sequentially pass through outer chamber and inner chamber body after with
The connected high-field electrode of spray point and the collector electrode being mounted on after outer chamber in inner chamber body；
The outer chamber includes outer chamber protecgulum, the outer chamber rear cover being connected with cover back-end before outer chamber and by outer chamber protecgulum
The first cavity surrounded with outer chamber rear cover；Offered on the outer chamber protecgulum particulate matter that is connected with the first cavity into
Mouthful, the electrically charged particle object outlet for offering and being connected with the first cavity is covered after outer chamber；
The inner chamber body includes inner chamber body protecgulum, the inner chamber body rear cover being connected with cover back-end before inner chamber body and by inner chamber body protecgulum
The second cavity surrounded with inner chamber body rear cover；Ion jet port is offered on the inner chamber body protecgulum；It is covered after the inner chamber body
Equipped with the pure air import being connected with the second cavity, and the pure air import is pierced by from outer chamber rear cover；
The spray point, particulate matter import, ion jet port and electrically charged particle object outlet coaxial arrangement；
Region between the particulate matter import and ion jet port is the charged region of particulate matter；First cavity and the second sky
Region between chamber is free ion capture zone.
2. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The first insulating sleeve is arranged on the high-field electrode；The spray point is mounted on inner cavity by the second insulating sleeve
It is covered after body；Third insulating sleeve is arranged on the collector electrode.
3. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The spray point use tungsten material, and the tip diameter of spray point be less than 2 μm, length of needlepoint be less than 10mm, needle point and
The distance between ion jet port center is 5mm.
4. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The outer chamber protecgulum and inner chamber body protecgulum are arc surface.
5. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The particulate matter import, ion jet port, the outlet of electrically charged particle object, inner chamber body protecgulum, inner chamber body rear cover, outer chamber
Protecgulum and outer chamber rear cover are all made of stainless steel.
6. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The high-field electrode and collector electrode are all made of copper material.
7. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 1, special
Sign is：The pure air import includes symmetrically arranged first pure air import and the second pure air import；It is described
Pure air import uses polyether-ether-ketone material.
8. a kind of unipolarity particulate matter charge device of integrated free ion trapping function according to claim 2, special
Sign is：First, second, and third insulating sleeve is all made of polyether-ether-ketone material.
9. the method for the charge device according to claim 1 ~ 8 any one, it is characterised in that：This method includes following step
Suddenly：
（1）Pure air is entered by the first pure air import and the second pure air import in the second cavity；
（2）High pressure is accessed into the end of high-field electrode, point discharge occurs for the tip of spray point, to make to enter the second cavity
In pure air ionize, generate a large amount of ion；
（3）Under the promotion of pure air stream, the ion in the second cavity enters particulate matter charging area by ion jet port
Domain；
（4）Atmospheric particulates enter the charged region of particulate matter by particulate matter import；
（5）In the charged region of particulate matter, the Atmospheric particulates in ion and sample gas collide, and ion is attached to airborne particulate
On object, Atmospheric particulates is made to charge, to obtain charged particle thing；Under the action of sample gas air-flow, charged particle thing and remaining
The ion being not attached on Atmospheric particulates enters free ion capture zone；
（6）Collector electrode is accessed into trapping voltage, trapping electric field is formed in free ion capture zone, in the work of trapping electric field
Under, remaining is not attached to the ion on Atmospheric particulates and is collected by the inner wall of inner chamber body protecgulum and inner chamber body rear cover；In sample gas
Under the electric field force effect of air-flow and trapping electric field, charged particle thing is exported by electrically charged particle object to flow out.
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| CN107138277B true CN107138277B (en) | 2018-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102137879B1 (en) | 2018-09-05 | 2020-07-28 | 한국기계연구원 | Electrostatic precipitation device for particle removal in explosive gases |
| KR102245787B1 (en) * | 2019-06-03 | 2021-04-29 | 한국기계연구원 | Electrostatic precipitation device for particle removal in explosive gases |
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| CN110000003B (en) * | 2019-03-28 | 2023-11-21 | 大连理工大学 | Shower nozzle formula anion emission rifle based on hollow needle electrode |
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| CN115876658B (en) * | 2023-03-02 | 2023-05-09 | 北京复兰环保科技有限公司 | Particulate matter concentration detection device, particulate matter concentration detection method, storage medium, and electronic apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107138277A (en) | 2017-09-08 |
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