CN108554136A - A kind of device and method of asymmetric single dielectric barrier discharge processing VOCs - Google Patents
A kind of device and method of asymmetric single dielectric barrier discharge processing VOCs Download PDFInfo
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- CN108554136A CN108554136A CN201810216509.8A CN201810216509A CN108554136A CN 108554136 A CN108554136 A CN 108554136A CN 201810216509 A CN201810216509 A CN 201810216509A CN 108554136 A CN108554136 A CN 108554136A
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention belongs to VOCs processing unit technical fields, are related to a kind of device and method of asymmetric single dielectric barrier discharge processing VOCs.The device includes wind turbine, power supply and babinet；Homogenizing plate, electrode fixed plate and discharge cell are equipped in babinet.Discharge cell is asymmetric discharge electrode structure, including metal electrode and insulated dielectric tube；Metal electrode is by being threaded, the metallic rod of fin structure is made；Electrode in medium made of conductive material is equipped in insulated dielectric tube.Gas containing VOCs is entered by device portal, enter highdensity strong plasma discharge after homogenizing plate flows, it collides with the high activity particle that electric discharge generates and reacts and degrade, the coking substance that discharge process generates is collected at groove position on metal electrode, keeps stable discharge and treatment effect efficient.The present invention has many advantages, such as that cleaning frequency length and VOCs treatment effeciencies are high, is suitable for relevant industries processing VOCs pollutions.
Description
Technical field
The invention belongs to VOCs processing unit technical fields, and in particular to a kind of asymmetric single dielectric barrier discharge processing
The device and method of VOCs.
Background technology
With being continuously increased for China's commercial production scale and novel product type and quantity, the type of atmosphere pollution
It is also being continuously increased with quantity, air environmental pollution getting worse gradually causes attention of the people for pollution control.Industry
Main source one of of the exhaust gas as atmosphere pollution, especially health and environment of the volatile organic contaminant (VOCs) to the mankind
Huge harm is caused, VOCs is divided by source is generated in industrial waste gas, mainly there is lacquer spraying waste gas, plastics exhaust gas, waste plastic
Gas, sizing exhaust gas, chemical industry organic exhaust gas and printing exhaust gas etc..When the VOCs in environment reaches a certain concentration, people in the short time
Can feel dizziness, headache, Nausea and vomiting, weak etc., will appear when serious twitch, stupor, and can hurt people kidney,
Liver, brain and nervous system cause the serious consequences such as anaemia, failure of memory.
In recent years, lower temperature plasma technology becomes as a kind of application technology with development prospect at gaseous pollutant
The research hotspot of reason.Compared with traditional technology, lower temperature plasma technology has, processing effect adaptable to gaseous pollutant
The features such as fruit is high.The major way that gas discharge generates low temperature plasma has：Corona discharge, glow discharge, dielectric impedance are put
Electricity, gliding arc discharge and jet stream electric discharge etc..Wherein, corona discharge and dielectric barrier discharge can generate surely at normal atmospheric pressure
Fixed atmosphere plasma is widely used in field of environmental improvement, especially dielectric barrier discharge, and electron density is big, electric discharge is strong
The advantages that degree is big, anti impulsion load becomes the preferred method for generating aggressive plasma.
Traditional dielectric barrier discharge, which generates plasma form, board-like plate, coaxial circles cartridge type, filling bed type etc., puts
Electric electrode structure is symmetrical, during discharge treatment VOCs, the high energy of gaseous organic pollutant molecule and electric discharge generation
Sharp impacts occur for electronics and active particle, and larger molecular organics will produce the intermediate product of oily during degradation, this
A little intermediate products can be constantly adhered to electrode surface and be built up with certain coked version, due to the adherency of coking substance with
Machine and inhomogeneities so that discharge air-gap is uneven, influences the uniformity of region of discharge, reduces strength of discharge and energy profit
With rate, mineralization rate and pollutants removal rate are reduced, it is excessively narrow to also result in shelf depreciation air gap when serious, is also easy to produce spark
Electric discharge or arc discharge cause the even fire etc. that catches fire, therefore timing replacement or cleaning are needed during practical application
Electrode, and which increase costs device operation and safeguarded.
Invention content
In order to overcome the shortcomings of that existing symmetrical electrode structure handles VOCs, the present invention provides a kind of asymmetric electrode structures
The device of single dielectric barrier discharge processing VOCs, discharge cell are (in dielectric electric by metal electrode-insulated dielectric tube
Pole) it is in the asymmetric discharge electrode structure that line-styled is arranged to make up, so that the electric field strength of region of discharge is strengthened, utilizes gold
The groove belonged on electrode separates in by-product deposition region with region of discharge, designs simple, high treating effect, degradation efficiency
Height, cleaning frequency are long, can be applied to the efficient degradation of processing relevant industries VOCs.
In order to achieve the above object, the technical scheme is that：
A kind of device of asymmetric single dielectric barrier discharge processing VOCs, including wind turbine 1, power supply 2 and babinet 3.
The wind turbine 1 is located at the exhaust gas inlet of babinet 3 at (air blast form) or waste gas outlet (air inducing form), is used
In by exhaust gas be sent into or draw babinet 3；The two poles of the earth of the power supply 2 respectively with the metal electrode 7 in the discharge cell of babinet 36
It is connected with electrode in dielectric 8.
3 both ends of babinet are respectively equipped with exhaust gas inlet and waste gas outlet, are internally provided with homogenizing plate 4, electrode fixed plate 5
With discharge cell 6.
The homogenizing plate 4 is mounted on one end of the close exhaust gas inlet in 3 inside of babinet, vertical with exhaust gas flow direction；
Flowing plate is furnished with equidistant channel on 4 surface, makes air-flow uniformly through region of discharge.
The electrode fixed plate 5 is separately fixed at the top and bottom of 3 inner wall of babinet, one end of close waste gas outlet,
Wherein, the lower surface of top electrodes fixed plate 5 and the upper surface of bottom electrode fixed plate 5 are respectively equipped with card slot, are put for fixation
Metal electrode 7 in electric unit 6 and insulated dielectric tube 9.
The discharge cell 6 is arranged side by side in line-styled arrangement by multiple metal electrodes 7 and insulated dielectric tube 9, is formed non-
Symmetry electrode, discharge air-gap is 1-50mm between 9 outer wall of metal electrode 7 and insulated dielectric tube.The metal electrode 7 is by band
There is the metallic rod of screw thread, fin structure to be made, surface is equipped with U-typed or " V " type groove；8, electrode in the dielectric
In insulated dielectric tube 9 and coaxial, electrode 8 is made of conductive material in dielectric.
The depth of groove d of the metal electrode 7 is 1-100mm, and screw thread, fin structure are with continuous type or discrete
Mode is arranged and is combined, and the configuration gap L wherein between discrete is 1-100mm.
Ratio is 0.1-10 between the outer diameter and the outer diameter of insulated dielectric tube 9 of the metal electrode 7:1.
The discharge cell 6 when increasing region of discharge, can increase metal electrode 7, electrode 8 and insulation in dielectric
9 quantity of medium tube, residence time of the extension gas in region of discharge.
The power supply 2 is AC power or the pulse power, ensures electric discharge device regular picture.
The material of electrode 8 is electroconductive powder, metal column or conducting liquid in the dielectric；The insulation is situated between
The material of matter pipe 9 is glass, quartz or ceramics, thickness 1-100mm；The electrode fixed plate 5 by insulating materials make and
At ensure that the stability of discharging structure；The wind turbine 1 is corrosion resistant fan.
A kind of method of asymmetric single dielectric barrier discharge processing VOCs, includes the following steps：
(1) by VOCs gases by exhaust gas inlet be sent into babinet 3, by after homogenizing plate 4 even into discharge cell 6.
(2) make discharge cell 6 on electrode 8 in the metal electrode 7 and dielectric by the load of power supply 2 in discharge cell 6
Strong plasma discharge is formed to generate high activity particle, VOCs between 9 outer wall of interior metal electrode 7 and insulated dielectric tube
It collides with high activity particle, makes VOCs ionization, dissociation and excitation.
(3) gas channel of the intermediate product aerosol particles that VOCs ionization, dissociation and excitation generate in discharge cell 6
It is deposited in recess region by polarization, the surface of metal electrode migration small to radius of curvature under asymmetric forceful electric power field action.
(4) gas after degrading is discharged from the waste gas outlet of babinet 3.
The discharge electrode structure of the present invention is different from traditional symmetrical electrode structure, is by metal electrode and insulated dielectric tube
(electrode in dielectric) is in a kind of asymmetric electrode structure that line-styled is arranged to make up, and can be generated in electric discharge regional area
Inhomogeneous field, make the aerosol particles generated during discharge treatment by the polarization of electric field and to the direction of highfield
Movement, to effectively be deposited on the groove location of screw thread or fin structure both sides on metal electrode, and by region of discharge with it is secondary
Product deposition region disconnecting comes, therefore ensure that discharging gap is consistent, and electric discharge is made more to stablize；In addition, in discharge process
Uniform Filamentous streamer-discahrge can be generated, forms strong plasma discharge, the electron amount of generation is big, centrality is strong, into
And the particle activity of region of discharge is improved, active particle carries out effective collision with gaseous pollutant molecule, makes gaseous pollutant
It is preferably degraded, so as to improve strength of discharge and pollutant process efficiency, improves mineralization rate and utilization rate of electrical, and
Cleaning and the replacement frequency of electrode can be reduced, extends service life of equipment, reduces the operation and maintenance expense of equipment.
Beneficial effects of the present invention：
Apparatus and method of the present invention be using be threaded, the metal with groove structure that fin iso-curvature radius is small
Bar is as metal electrode, using the conductive material being filled in insulated dielectric tube as electrode in dielectric, by metal electrode and
Insulated dielectric tube (electrode in dielectric) is arranged to make up a kind of asymmetric discharge electrode structure to form part in line-styled
Inhomogeneous field enables the intermediate product aerosol that electric discharge generates to be collected in the groove of metal electrode, to realize
Electric discharge long-time efficient stable is kept, the purpose of electrode clean and replacement cycle is extended, device operating cost is reduced, has
Wide application prospect.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the 3 dimensional drawing of discharge cell in the embodiment of the present invention.
Fig. 3 is the sectional view of discharge cell in the embodiment of the present invention, is made of 3 column units.
Fig. 4 is the section simplified schematic diagram of metal electrode in the present invention, and Fig. 4 (a) is that the section of continuous type metal electrode is illustrated
Schematic diagram, Fig. 4 (b) are the section simplified schematic diagram of discrete metal electrode, wherein d represents the depth of groove, and L represents discontinuous
The spacing distance of configuration in type.
Fig. 5 is the floor map of homogenizing plate in the embodiment of the present invention.
In figure：1 wind turbine；2 power supplys；3 babinets；4 homogenizing plates；5 electrode fixed plates；6 discharge cells；7 metal electrodes；8 insulation
Electrode in medium；9 insulated dielectric tubes.
Specific implementation mode：
Below in conjunction with attached drawing and technical solution, the specific implementation mode that further illustrates the present invention.
As shown in Figure 1, the device of asymmetric single dielectric barrier discharge processing VOCs of the present embodiment, including wind turbine 1, power supply
2, babinet 3, homogenizing plate 4, electrode fixed plate 5 and discharge cell 6,3 both ends of babinet are equipped with exhaust gas inlet and waste gas outlet；
The wind turbine 1 is located at the exhaust gas inlet of babinet 3 at (air blast form) or waste gas outlet (air inducing form), is used for exhaust gas
It is sent into or draws babinet 3；Homogenizing plate 4, electrode fixed plate 5 and discharge cell 6 are equipped in the babinet 3；The homogenizing plate 4
In at the exhaust gas inlet, being made of quartz plate, being furnished with equidistant channel thereon makes air-flow uniformly through region of discharge in babinet 3
Domain；The electrode fixed plate 5 and discharge cell 6 is located at one end close to waste gas outlet in babinet 3；Electrode fixed plate 5 is by exhausted
The good bakelite plate of edge is process, and the stability for ensureing discharge electrode structure is closely connect with discharge cell 6.
The babinet 3 is made of acrylic board, has good insulating properties, except there are exhaust gas inlet and waste gas outlet in both sides
Remaining outer position can guarantee good leakproofness, and can bear certain pressure；The power supply 2 is high-frequency ac power, work(
Under rate 5kHZ, ensure the applied voltage of device normal homogeneous electric discharge between 8-16KV.
It is illustrated in figure 2 the schematic diagram of electrode fixed plate 5 and discharge cell 6, wherein discharge cell 6 is by metal electrode 7
With electrode in dielectric 8 constitute asymmetric electrode discharging structure, metal electrode 7 using standard M6 stainless steel threaded rods process and
At screw pitch 1mm；Electrode 8 uses common carbon dust in dielectric, and is filled in insulated dielectric tube 9, insulated dielectric tube
9 be quartz ampoule, and outer diameter 6mm, wall thickness 1.5mm play fixed and anti-oxidation effect；Metal electrode 7 is parallel with dielectric 9 simultaneously
It sets, metal electrode 7 and 9 outer wall gap of insulated dielectric tube are 2mm, and effective discharge length is 200mm, the office formed after applied voltage
Portion region electric field is inhomogeneous field, is conducive to the band electro-deposition of aerosol.
It is illustrated in figure 3 the sectional view of electrode fixed plate 5, this example is that threaded rod-quartz ampoule (filling carbon dust) is this
Together by line-styled linear combination, the electric discharge for forming compact-sized flexible assembling is anti-for single medium blocking discharge electrode structure
Device is answered, totally three column units, uniformly the quartz ampoule of filling carbon dust and 4 M6 threaded rods form each column unit by 3.
The embodiment of the present invention, operation principle and flow：
VOCs is sent into reaction unit by wind turbine, by homogenizing plate even into region of discharge, under supply voltage, and metal electricity
Radius of curvature is small at extremely upper screw thread, is easy stored charge, and quartzy pipe surface smooth curved radius is big, therefore in electric discharge partial zones
Asymmetric highfield is formed in domain, the active particle fierceness collisional decomposition that VOCs macromoleculars are generated with highfield is at small molecule, production
Raw intermediate product aerosol particles are in electroneutral, and the polarization through electric field is moved to strong electric field region, that is, threaded rod direction,
To be accumulated in the groove positions of screw thread both sides well, region of discharge and deposit collection region are separated, avoid due to
Deposit it is direct accumulation and influence strength of discharge and stability, keep treatment effect uniform and stable, to reach extend electrode it is clear
It washes and the replacement cycle, saves the purpose of device operation and maintenance cost, last treated VOCs is from reaction unit waste gas outlet
Place's discharge.
Using toluene as type VOCs is represented in the present embodiment, using the device unsymmetric structure, (metal electrode is M6 spiral shell
Rasp bar) (metal electrode is with symmetrical structureSmooth shaft) long-time continuous discharge under the conditions of 5kHZ, 10kV higher concentration
Processing 14h carries out electric discharge comparison.The aerosol that unsymmetric structure electric discharge generates after continuous discharge 14h is distributed on discharge electrode
It is even and fill up groove, and the aerosol that symmetrical structure electric discharge generates accumulated on electrode structure it is serious and uneven；It is asymmetric to put
Electric structure discharge power and electric current kept stable, and symmetrical structure discharge power rises 36%, electric current increases 1.6 times.Knot
Fruit proves that the device of this asymmetric single dielectric barrier discharge processing VOCs can collect the aerosol that electric discharge generates, and keeps electric discharge steady
Extension of fixing time reduces the purpose of device operating cost to reach extension electrode clean and replacement cycle.
Claims (9)
1. a kind of device of asymmetric single dielectric barrier discharge processing VOCs, which is characterized in that the device includes wind turbine (1), electricity
Source (2) and babinet (3)；
The wind turbine (1) is located at the exhaust gas inlet of babinet (3) or at waste gas outlet, is used for exhaust gas feeding or outlet box
Body (3) is air blast form when wind turbine (1) is located at exhaust gas inlet, is air inducing shape when wind turbine (1) is located at waste gas outlet
Formula；The two poles of the earth of the power supply (2) respectively with electrode in metal electrode (7) in the discharge cell of babinet (3) (6) and dielectric
(8) it connects；
The babinet (3), both ends are respectively equipped with exhaust gas inlet and waste gas outlet, are internally provided with homogenizing plate (4), electrode fixed plate
(5) and discharge cell (6)；
The homogenizing plate (4) is mounted on one end of the internal close exhaust gas inlet of babinet (3), vertical with exhaust gas flow direction；
It is furnished with equidistant channel on flowing plate (4) surface, makes air-flow uniformly through region of discharge；
The electrode fixed plate (5), is separately fixed at the top and bottom of babinet (3) inner wall, one end of close waste gas outlet,
The lower surface of the electrode fixed plate (5) at top and the upper surface of the electrode fixed plate (5) of bottom are respectively equipped with card slot, for fixing
Metal electrode (7) in discharge cell (6) and insulated dielectric tube (9)；
The discharge cell (6) is arranged side by side in line-styled arrangement by multiple metal electrodes (7) and insulated dielectric tube (9), is formed
Asymmetric electrode, discharge air-gap is 1-50mm between metal electrode (7) and insulated dielectric tube (9) outer wall；The metal electrode
(7) by being threaded, the metallic rod of fin structure be made, surface be equipped with U-typed or " V " type groove, screw thread, fin knot
Structure is arranged and is combined in a manner of continuous type or discrete, and the configuration gap L wherein between discrete is 1-100mm；Institute
Ratio is 0.1-10 between the outer diameter and the outer diameter of insulated dielectric tube (9) of the metal electrode (7) stated:1；It is electric in the dielectric
Pole (8) is located in insulated dielectric tube (9) and coaxially, electrode (8) is made of conductive material in dielectric.
2. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 1 a kind of, which is characterized in that institute
The depth of groove d for the metal electrode (7) stated is 1-100mm.
3. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 1 or 2 a kind of, feature exist
In, the discharge cell (6) by increasing metal electrode (7), electrode (8) and insulated dielectric tube (9) quantity in dielectric,
Increase region of discharge, residence time of the extension gas in region of discharge.
4. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 1 or 2 a kind of, feature exist
In the power supply (2) is AC power or the pulse power, ensures electric discharge device regular picture.
5. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 3 a kind of, which is characterized in that institute
The power supply (2) stated is AC power or the pulse power, ensures electric discharge device regular picture.
6. the device of asymmetric single dielectric barrier discharge processing VOCs according to claims 1 or 2 or 5 a kind of, feature
It is, the material of electrode (8) is electroconductive powder, metal column or conducting liquid in the dielectric；The insulation is situated between
The material of matter pipe (9) is glass, quartz or ceramics, thickness 1-100mm；The electrode fixed plate (5) is by insulating materials system
It forms, ensures the stability of discharging structure.
7. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 3 a kind of, which is characterized in that institute
The material of electrode (8) is electroconductive powder, metal column or conducting liquid in the dielectric stated；The insulated dielectric tube (9)
Material be glass, quartz or ceramics, thickness 1-100mm；The electrode fixed plate (5) is made by insulating materials,
Ensure the stability of discharging structure.
8. the device of asymmetric single dielectric barrier discharge processing VOCs according to claim 4 a kind of, which is characterized in that institute
The material of electrode (8) is electroconductive powder, metal column or conducting liquid in the dielectric stated；The insulated dielectric tube (9)
Material be glass, quartz or ceramics, thickness 1-100mm；The electrode fixed plate (5) is made by insulating materials,
Ensure the stability of discharging structure.
9. a kind of method of asymmetric single dielectric barrier discharge processing VOCs, which is characterized in that include the following steps：
The first step, by VOCs gases by exhaust gas inlet be sent into babinet (3), by after homogenizing plate (4) even into discharge cell
(6)；
Second step makes power supply (2) load on electrode (8) in the metal electrode (7) and dielectric in discharge cell (6)
Strong plasma discharge is formed to generate between discharge cell (6) interior metal electrode (7) and insulated dielectric tube (9) outer wall
High activity particle, VOCs collide with high activity particle, make VOCs ionization, dissociation and excitation；
Third walks, the asymmetric forceful electric power field action of the intermediate product aerosol particles of generation in the gas channel of discharge cell (6)
Under by polarization, the surface of metal electrode migration small to radius of curvature is deposited in recess region；
4th step, the gas after degradation are discharged from the waste gas outlet of babinet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216509.8A CN108554136B (en) | 2018-03-16 | 2018-03-16 | Device and method for treating VOCs by asymmetric single-medium barrier discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810216509.8A CN108554136B (en) | 2018-03-16 | 2018-03-16 | Device and method for treating VOCs by asymmetric single-medium barrier discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108554136A true CN108554136A (en) | 2018-09-21 |
| CN108554136B CN108554136B (en) | 2023-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810216509.8A Active CN108554136B (en) | 2018-03-16 | 2018-03-16 | Device and method for treating VOCs by asymmetric single-medium barrier discharge |
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| CN110124473A (en) * | 2019-06-12 | 2019-08-16 | 青岛双星环保设备有限公司 | Double-dielectric barrier discharge device for foul waste gas processing |
| CN111439728A (en) * | 2019-01-16 | 2020-07-24 | 中国石油化工股份有限公司 | High-flux low-temperature plasma discharge equipment and method for decomposing hydrogen sulfide |
| CN111437699A (en) * | 2019-01-16 | 2020-07-24 | 中国石油化工股份有限公司 | High-flux plasma discharge equipment and method for decomposing hydrogen sulfide |
| CN112536008A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Plasma reactor and online decoking method thereof |
| CN113149127A (en) * | 2021-03-12 | 2021-07-23 | 东华大学 | Device and method for efficiently and quickly treating perfluorinated compounds in sewage |
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