CN108619869A - A kind of light enhancing plasma air purifying device and method - Google Patents
A kind of light enhancing plasma air purifying device and method Download PDFInfo
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- CN108619869A CN108619869A CN201710169742.0A CN201710169742A CN108619869A CN 108619869 A CN108619869 A CN 108619869A CN 201710169742 A CN201710169742 A CN 201710169742A CN 108619869 A CN108619869 A CN 108619869A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/808—Laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The multiple functions such as plasma air purifying Integration ofTechnology sterilizing, dedusting, decomposing formaldehyde and TVOC, have a wide range of applications in various fields.However, when electric discharge generates plasma in air, by-product ozone and nitrogen oxides are difficult to avoid that, making plasma technique, air purification field is seriously restricted indoors.The present invention, a kind of device and method of light enhancing plasma air purifying, it can be under the premise of not increasing plasma power, enhance plasma air purifying efficiency, and decompose the by-product ozone and nitrogen oxides of atmospherical discharges plasma, well solved plasma air purifying efficiency and ozone and nitrous oxides concentration it is exceeded between contradiction, and improve plasma air purifying and industrial waste gas processing efficiency.
Description
Technical field
Fields of the present invention are technical field of environmental management, and in particular to a kind of light enhancing plasma air purifying dress
It sets and method.
Background technology
The multiple functions such as plasma air purifying Integration ofTechnology sterilizing, dedusting, decomposing formaldehyde and TVOC, in numerous necks
Domain has a wide range of applications.However, when electric discharge generates plasma in air, by-product ozone and nitrogen oxides are difficult to
It avoids, making plasma technique, air purification field is seriously restricted indoors.If the mankind or animal are in for a long time
Ozone and the exceeded environment of nitrogen oxides, it would be possible to cause the uncomfortable reaction of body, also some researches show that plant growth is dense in ozone
In the long-term exceeded environment of degree, the underproduction is also resulted in.In order to avoid ozone or nitrous oxides concentration are exceeded, can only reduce etc. from
The power density of daughter, this just sacrifices the efficiency of plasma sterilization, dedusting, decomposing formaldehyde and TVOC.Plasma air
Contradiction between purification efficiency and ozone and nitrous oxides concentration are exceeded seriously constrains plasma technique indoors
Air purification field, green organic agricultural field and the popularization and application for cultivating field.
In terms of industrial waste gas of plasma processing, since charge movement free path is extremely short under atmospheric pressure, collision frequency pole
Height, acceleration distance is too short, is difficult to obtain very high energy under high electric field, therefore, the inelastic collision frequency of charge
Far below elastic collision frequency, big energy is caused not to be used for plasma chemical reaction, but be used for heat gas, caused
The Energy Efficiency Ratio of plasma industrial waste gas treatment is low, this is also that restriction industrial waste gas of plasma treatment technology is widely applied
Key factor.
Invention content
A kind of present invention, device and method of light enhancing plasma air purifying, can not increase plasma work(
Under the premise of rate, enhance plasma air purifying efficiency, and decompose the by-product ozone and nitrogen oxygen of atmospherical discharges plasma
Compound, well solved plasma air purifying efficiency and ozone and nitrous oxides concentration it is exceeded between contradiction, and carry
The high efficiency of plasma air purifying and industrial waste gas processing.
The device of a kind of light enhancing plasma air purifying, which is characterized in that including enhancing electrode, dust electricity
Pole and light source composition, as shown in Figure 1, wherein：
Enhancing electrode is made of corona electrode and electric field electrode, and corona electrode, which is clipped among electric field electrode, constitutes enhancing electrode, such as
Shown in Fig. 2, be different from traditional screen electrode, enhancing electrode of the invention by the way that corona electrode is clipped among electric field electrode,
Electric field electrode plays fixed corona electrode and enhancing electric field action.The high-voltage output end for enhancing electrode and high voltage power supply connects, and
Among two collecting electrodes, it is transmitting charge to have double function, I（Electronics or ion）, ionize and excite air, and make
Dust charges；II is to form high voltage electric field to collecting electrode, makes charge（Electronics and ion）Accelerate to dust electricity with charged dust
Polar motion.
Collecting electrode setting is in enhancing electrode both sides, also, collecting electrode surface is parallel with enhancing electrode surface, dust electricity
The low-voltage output of pole and high voltage power supply connects.
Light source is arranged at the both ends of collecting electrode, and light source luminescent is facing towards collecting electrode and enhances the region between electrode,
Light that light source is sent out at the same project the gentle stream of plasma discharge between electrode leave plasma discharge region it
Plasma wake flow region afterwards.
The corona electrode is made of conductive fiber, conductive fine such as carbon fiber, electric conductive oxidation fibres, woven wire
Dimension has very thin diameter, and extremely strong electric field enhancement effect is formed in fibre tip, is conducive to transmitting charge.
The corona electrode being clipped among the electric field electrode at least one side edge protrudes outward among electric field electrode,
Corona electrode edge protruded outward among electric field electrode it is more, to transmitting charge it is more advantageous, and protrusion it is fewer, then to improve collect
Dirt electric field strength is more advantageous.
The distance of edge to the collecting electrode of the corona electrode of the enhancing electrode is more than electric field electrode to collecting electrode
Distance, the difference between the two it is more big conducive to improve dust electric field, the difference between the two is smaller, more be conducive to transmitting charge.
Transpassivation and roughening treatment are done in the electric field electrode surface of the enhancing electrode, improve its surface resistivity, and
Reduce adsorption capacity of its surface to dust.Surface resistivity is high, is conducive to improve dust electric field strength, and absorption of the surface to dust
Power is weak to be then conducive to cleaning.
Hydrophobic treatment is passed through on the collecting electrode surface, reduces adsorption capacity of its surface to dust, easy to clean.
The light source is semiconductor light source or glow discharge spot lamp, and semiconductor light source is small, the efficient, service life
It is long, at low cost, can meet need under the premise of, it is preferential to use, still, at present semiconductor light source can only radiation energy less than
The photon of 4.0eV, and need photon energy be more than 4.0eV when, then glow discharge spot lamp can be used.
The emission spectrum of the light source is between 1.0-8.0eV.
A kind of method of the light enhancing plasma air purifying, which is characterized in that
On the one hand, by introducing external light source, such as light emitting diode（LED）, laser diode（LD）Or gas discharge lamp tube
（GDL）, enhance the effect of plasma for purification air using the high intensity photon of external light source transmitting, principle is to utilize
Photon energy synergistic effect enhances plasma to the harmful substance including formaldehyde, TVOCs, ozone and nitrogen oxides
Degradation, i.e., the energy of photon on the energy supposition of the charged particle of plasma exciatiaon, excited atom and molecule keep low energy electric
Lotus（Electronics and ion）After being superimposed with photon energy, just reaches the threshold value of ionization or excited gas atom and molecule, not only carry
It is high it is plasma-activated can, also increase the effective cross section of collision of ionization, excitation, decomposition and polymerization, enhance plasma
Reactivity.The light of 1.0-8.0eV energy common intensities is individually collided with air molecule, and the possibility ionized is almost
No, the possibility excited is also very low, and still, such photon projects heating region or plasma wake flow
When region, directly participate in plasma ionization, excited gas molecule and organic molecule of degrading process, such as participate in oxygen molecule and oxygen
Atom ionizes and excitation, the decomposition for participating in formaldehyde molecule, and Main physical chemical process is photon, charged particle（Including electronics and
Ion）And neutral particle（Including excited atom and molecule and ground state neutral molecule）Between crash response.And in participating in
Property particle（Including excited atom and molecule and ground state neutral molecule）De excitation hair and decomposable process, such as ozone molecule and
The decomposition of nitrogen oxides molecule.The effect of photon and plasma body cooperative effect works independently the effect of generation far better than the two
The sum of.
On the other hand, enhance dust collecting effect by the way that corona electrode and electric field electrode are combined into enhancing electrode, and reduce
Corona discharge harmful side product discharges, and principle is to utilize the electric field electrode partly shielding effect electric field enhancement effect of corona electrode,
Method is that medial surface in electric field electrode is arranged in corona electrode, and electric field electrode is lateral surface in face of collecting electrode side.
The photon energy of the enhancing plasma air purifying efficiency is between 1.0-8.0eV, according to energy supposition
Theory, the photon energy the big more conducive to enhancing plasma air purifying efficiency, however, differential responses object is to different energy in air
The absorption for measuring photon is selective, and therefore, it is necessary to need list according to plasma air purifying reaction mechanism to confirm
Coloured light or polychrome complex light, and may project the photon of different-energy in different zones.
The gentle stream of plasma discharge of the light projection of the external light source between the electrodes leaves plasma
Plasma wake flow region after body region of discharge, in plasma discharge, photon is primarily involved in plasma ionization, swashs
The process of gas molecule and organic molecule of degrading is sent out, in plasma wake flow region, photon is primarily involved in the de excitation of neutral particle
Hair and decomposable process.
Description of the drawings
Fig. 1 light enhances plasma air purifying device schematic diagram.
Fig. 2 enhance electrode schematic diagram.
In figure, 1 enhancing electrode, 2 collecting electrodes, 3 light sources, 1-1 corona electrodes, 1-2 electric field electrodes.
Specific implementation mode
Embodiment 1
Enhance electrode：Using the processed U-shaped aluminum strip of a surface anodization as electric field electrode, aluminium thickness 1mm, wide 3mm,
High 20mm, groove depth 19mm, long 470mm；Using conductive carbon fibre band as corona electrode, thick 0.3mm, wide 19.5mm are long
460mm；Carbon fiber tape is inserted into U-shaped aluminum strip medial launder, protrudes outward 0.5mm, and U-shaped aluminum strip tightening U-type groove fixes carbon fiber tape
Constitute an enhancing electrode.
Collecting electrode：One aluminium flat bar is as a collecting electrode, thick 1mm, wide 40mm, long 500mm.10 collecting electrodes
With 9 enhancing electrode runs parallel assemblings, an air-purifying module is formed.One enhancing electricity of setting among each two collecting electrode
Pole, each two enhance electrode centre there are one collecting electrode, and enhancing electrode is arranged alternately with collecting electrode, enhancing electrode group and height
Voltage source high-voltage output end connects, and collecting electrode group is connect with high voltage power supply low-voltage output.The U of collecting electrode and enhancing electrode
The distance between type aluminum strip electric field electrode is 10mm, enhances the carbon fiber tape corona electrode edge of electrode between collecting electrode
Distance is 10.5mm.
Light source：The ultraviolet LED light source that a power is 3W is arranged in one end of every enhancing electrode, and centre wavelength is in 365nm；
In the side of enhancing electrode, i.e. plasma wake flow region, the low pressure mercury lamp fluorescent tube of a 15W, fluorescent tube and enhancing electrode are set
Parallel, the peak value of low pressure mercury lamp primary radiation spectrum is in 253.7nm.
The light of the present embodiment device application enhances plasma air purifying method, significantly improves air purification efficiency,
And reduce ozone and nitrous oxides concentration.Air be never arranged low pressure mercury lamp fluorescent tube side enter and flow through enhancing electrode with
Region between collecting electrode, air are purified by light and plasma body cooperative in this area, then from being provided with low pressure mercury lamp lamp
The side of pipe is flowed out, and before leaving, ozone and nitrogen oxides in air can also be decomposed again by photon.
The present embodiment light enhances plasma air purifying method and apparatus, and test data is such as in 30 cubes of standard test cabins
Under, it is 12 minutes the time required to PM2.5 removals 99%, natural bacteria killing rate is 99.9% within 1 hour, and formaldehyde removal rate is within 4 hours
90%, 24 hours ozone and nitrous oxides concentration are respectively 18PPB and 12PPB.The present embodiment parameters are significantly better than unglazed increasing
Strong and electrode increases powerful plasma air purifier, significantly improves the removal effect of gray haze and pernicious gas in air
Rate reduces ozone and nitrous oxides concentration.
Embodiment 2
Enhance electrode：For carbon fiber with the multi-layer silk screen of stainless steel wire shuffling, carbon fiber is woven in centre as corona electrode
One layer, the thickness about 0.2mm of carbon fiber layer, remaining each layer is made into for stainless steel wire, and the stainless steel wire layer in outside is as electric field electricity
Pole, silk screen overall thickness are 1.2mm.Multi-layer silk screen is cut into wide 20mm along cutting carbon fiber direction, long 470mm's band-like, guipure
Two edges respectively extract 6 stainless steel wires out, and the width of the stainless steel wire layer of guipure is made to reduce about 1mm, and the width of carbon fiber is constant,
Therefore, the carbon fiber layer width of shuffling guipure is 20mm, and the width of the stainless steel wire layer of shuffling guipure is 19mm, constitutes one
Enhance electrode.
Collecting electrode：One aluminium flat bar is as a collecting electrode, thick 1mm, wide 40mm, long 500mm.50 collecting electrodes
With 49 enhancing electrode runs parallel assemblings, an air-purifying module is formed.One enhancing electricity of setting among each two collecting electrode
Pole, each two enhance electrode centre there are one collecting electrode, and enhancing electrode is arranged alternately with collecting electrode, enhancing electrode group and height
Voltage source high-voltage output end connects, and collecting electrode group is connect with high voltage power supply low-voltage output.Collecting electrode with enhancing electrode it
Between distance be 10mm, enhance the carbon fiber tape corona electrode edge of electrode to the distance between collecting electrode be 10.5mm.
Light source：The ultraviolet LD light sources that a power is 1W are arranged in one end of every enhancing electrode, and centre wavelength is in 405nm；
In the side of enhancing electrode, i.e. plasma wake flow region, the low pressure mercury lamp fluorescent tube of 3 15W is set, fluorescent tube hangs down with enhancing electrode
Directly, the peak value of low pressure mercury lamp primary radiation spectrum is in 253.7nm.
The present embodiment light enhances plasma air purifying method and apparatus, and test data is such as in 30 cubes of standard test cabins
Under, it is 13 minutes the time required to PM2.5 removals 99%, natural bacteria killing rate is 99.9% within 1 hour, and formaldehyde removal rate is within 4 hours
91%, 24 hours ozone and nitrous oxides concentration are respectively 20PPB and 13PPB.The present embodiment parameters are significantly better than unglazed increasing
Strong and electrode increases powerful plasma air purifier, significantly improves the removal effect of gray haze and pernicious gas in air
Rate reduces ozone and nitrous oxides concentration.
Claims (10)
1. a kind of light enhances plasma air purifying device, which is characterized in that including enhancing electrode, collecting electrode and light source group
At, wherein：
Enhancing electrode is made of corona electrode and electric field electrode, and corona electrode, which is clipped among electric field electrode, constitutes enhancing electrode, increases
The high-voltage output end of forceful electric power pole and high voltage power supply connects, and among two collecting electrodes, and it is double to enhance electrode combination
Function, I are to emit charge by corona electrode（Electronics or ion）, ionize and excite air, and dust is made to charge；II is electric field electricity
High voltage electric field extremely is formed to collecting electrode, makes charge（Electronics and ion）Accelerate to move to collecting electrode with charged dust；
Collecting electrode setting is in enhancing electrode both sides, also, collecting electrode surface is parallel with enhancing electrode surface, collecting electrode and
The low-voltage output of high voltage power supply connects；
Light source is arranged at the both ends of collecting electrode, and light source luminescent is facing towards collecting electrode and enhances the region between electrode, light source
It the light that sends out while projecting after the gentle stream of plasma discharge between electrode leaves plasma discharge region
Plasma wake flow region.
2. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the corona
Electrode is made of conductive fiber, such as carbon fiber, electric conductive oxidation fibres, woven wire.
3. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that described is clipped in
Corona electrode at least one side edge among electric field electrode protrudes outward among electric field electrode.
4. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the enhancing
The distance of the edge of the corona electrode of electrode to collecting electrode is more than electric field electrode to the distance of collecting electrode.
5. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the enhancing
Transpassivation and roughening treatment are done in the electric field electrode surface of electrode, improve its surface resistivity, and reduce its surface to dust
Adsorption capacity.
6. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the dust
Electrode surface passes through hydrophobic treatment, reduces adsorption capacity of its surface to dust, easy to clean.
7. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the light source
It is semiconductor light source or glow discharge spot lamp.
8. a kind of light according to claim 1 enhances plasma air purifying device, which is characterized in that the light source
Emission spectrum between 1.0-8.0eV.
9. a kind of light enhances plasma air purifying method, which is characterized in that including photo-enhancement effect and electric enhancement effect：
Photo-enhancement effect：External light source, such as semiconductor light source or glow discharge spot lamp are introduced, external light source transmitting is utilized
High intensity photon enhances the effect of plasma for purification air；Photon directly participates in plasma ionization, excited gas molecule
With the process of degradation organic molecule, oxygen molecule and oxygen atom ionization and excitation, the decomposition for participating in formaldehyde molecule, main object are such as participated in
Physicochemical process is photon, charged particle（Including electronics and ion）And neutral particle（Including excited atom and molecule and
Ground state neutral molecule）Between crash response;And participate in neutral particle（It is neutral including excited atom and molecule and ground state
Molecule）De excitation hair and decomposable process release highly reactive form of oxygen atoms such as the decomposition of ozone molecule and nitrogen oxides molecule
TVOCs molecules, that is, decomposed TVOCs, is divided into and has solved ozone molecule and nitrogen oxides molecule；Light enhances plasma air purifying
The principle of method is to enhance plasma to including formaldehyde, TVOCs, ozone and nitrogen oxidation using photon energy synergistic effect
The degradation of harmful substance including object, i.e., on the energy supposition of the charged particle of plasma exciatiaon, excited atom and molecule
The energy of photon makes low energy charge（Electronics and ion）After being superimposed with photon energy, just reach ionization or excited gas atom
With the threshold value of molecule, activation energy is on the one hand improved, also improves secondary electron productivity and plasma charge density, another party
Face also increases the effective cross section of collision of ionization, excitation, decomposition and polymerization, enhances the reactivity of plasma, make etc. from
Daughter is significantly improved to the charge capacity and PARA FORMALDEHYDE PRILLS(91,95) of dust, the capacity of decomposition of TVOCs；
Electric enhancement effect：Enhance dust collecting effect by the way that corona electrode and electric field electrode are combined into enhancing electrode, and reduces electricity
Corona harmful side product discharges, and principle is the electric field enhancement effect using electric field electrode partly shielding effect corona electrode, method
That corona electrode is arranged in the centre of electric field electrode, electric field electrode than corona electrode apart from collecting electrode closer to.
10. a kind of light according to claim 1 enhances plasma air purifying method, which is characterized in that the light
The gentle stream of plasma discharge of son projection between the electrodes leaves the plasma wake flow after plasma discharge region
Region.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835805A (en) * | 2003-08-29 | 2006-09-20 | 大金工业株式会社 | Gas treatment device |
| CN105233611A (en) * | 2015-11-05 | 2016-01-13 | 周翠华 | Electric field and corona combined photocatalytic air purifier |
| CN105478238A (en) * | 2014-09-16 | 2016-04-13 | 孙红梅 | Wire-mesh-electrode discharging device |
-
2017
- 2017-03-21 CN CN201710169742.0A patent/CN108619869A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835805A (en) * | 2003-08-29 | 2006-09-20 | 大金工业株式会社 | Gas treatment device |
| CN105478238A (en) * | 2014-09-16 | 2016-04-13 | 孙红梅 | Wire-mesh-electrode discharging device |
| CN105233611A (en) * | 2015-11-05 | 2016-01-13 | 周翠华 | Electric field and corona combined photocatalytic air purifier |
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Application publication date: 20181009 |