CN108339379B - Electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device - Google Patents
Electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device Download PDFInfo
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- CN108339379B CN108339379B CN201810156812.3A CN201810156812A CN108339379B CN 108339379 B CN108339379 B CN 108339379B CN 201810156812 A CN201810156812 A CN 201810156812A CN 108339379 B CN108339379 B CN 108339379B
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- temperature plasma
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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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
- B01D2259/814—Magnetic fields
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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
Abstract
The invention belongs to the field of waste gas treatment, and particularly relates to an electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device which comprises an air inlet, a filter layer, an air equalizing layer, a wind shield, a low-temperature plasma generator group, a voltage regulator and an air outlet, wherein the low-temperature plasma generator group consists of a plurality of low-temperature plasma generators, and each low-temperature plasma generator comprises a shell, a spiral coil, a low-voltage discharge electrode dielectric layer, a high-voltage discharge electrode dielectric layer and a high-voltage discharge electrode. The device places low temperature plasma generator group perpendicular to air current direction, has greatly improved waste gas dwell time in plasma atmosphere, utilizes circular telegram solenoid to produce magnetic field simultaneously, through the size of adjusting circular telegram solenoid voltage, adjusts the intensity in magnetic field, makes low temperature plasma ware excited electrified high energy ion evenly distributed, and is bigger with waste gas area of contact, and exhaust-gas treatment is more high-efficient.
Description
Technical Field
The invention belongs to the field of waste gas treatment, and particularly relates to a low-temperature plasma waste gas treatment device based on electromagnetic induction coupling double media.
Background
The industrial waste gas treatment method includes an activated carbon adsorption method, a catalytic combustion method, a catalytic oxidation method, an acid-base neutralization method, a plasma method and the like, wherein low-temperature plasma is a substance fourth state following solid, liquid and gaseous states, and when an external voltage reaches the discharge voltage of the gas, the gas is broken down to generate a mixture including electrons, various ions, atoms and free radicals. Although the electron temperature is high in the discharge process, the heavy particle temperature is low, and the whole system is in a low-temperature state, so that the system is called low-temperature plasma. The low-temperature plasma pollutant degradation utilizes the action of active particles such as high-energy electrons and free radicals and pollutants in exhaust gas to decompose pollutant molecules in a very short time and carry out subsequent various reactions so as to achieve the purpose of degrading pollutants.
In the prior art, CN201720149399.9 is a low-temperature plasma waste gas treatment device, which comprises a housing, and an air inlet and an air outlet respectively arranged at two ends of the housing, and further comprises a filter module, a low-temperature plasma reaction module and an activated carbon fiber filter module sequentially arranged in the housing, wherein,
the low-temperature plasma reaction module comprises a first fixing plate, a second fixing plate and n low-temperature plasma reaction tubes arranged between the first fixing plate and the second fixing plate at intervals, wherein the n low-temperature plasma reaction tubes penetrate through the first fixing plate and the second fixing plate and extend along the flow path of fluid, the n low-temperature plasma reaction tubes comprise a cathode outer tube, an insulating medium inner tube and an anode rod, the anode rod is arranged in the insulating medium inner tube, an annular gap is arranged between the cathode outer tube and the insulating medium inner tube to pass through the radial section of the low-temperature plasma reaction tubes, the anode rod, the cathode outer tube and the insulating medium inner tube are of concentric circle structures, the low-temperature plasma reaction module further comprises an anode rod support used for fixing the anode rod, and the anode rod support is arranged on the first fixing plate, the anode rod support is provided with n support columns, the anode rod is sleeved on the n support columns, and discharging fluff made of a plurality of metal materials is spirally and uniformly distributed on the outer wall of the anode rod.
Although the device improves the waste gas treatment effect to a certain extent, the low-temperature plasma generator is parallel to the airflow direction, so that the waste gas has short retention time in the plasma atmosphere, can not be fully ionized, and the plasma space distribution is uneven, which inevitably leads to great reduction of the waste gas treatment effect.
Disclosure of Invention
In order to solve the problems, the invention provides a device for treating waste gas based on electromagnetic induction coupling double-medium low-temperature plasma, which is characterized in that a low-temperature plasma generator group is arranged perpendicular to the direction of air flow, so that the retention time of the waste gas in a plasma atmosphere is greatly prolonged, meanwhile, an electrified solenoid coil is used for generating a magnetic field, and the strength of the magnetic field is adjusted by adjusting the voltage of the electrified solenoid coil, so that charged high-energy ions excited by a low-temperature plasma are uniformly distributed, the contact area with the waste gas is larger, and the waste gas treatment is more efficient.
In order to achieve the above purpose, the invention provides the following technical scheme:
the electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device comprises an air inlet, a filter layer, an air equalizing layer, an air baffle, a low-temperature plasma generator group, a voltage regulator and an air outlet, wherein the low-temperature plasma generator group consists of a plurality of low-temperature plasma generators, and each low-temperature plasma generator comprises a shell, a spiral coil, a low-voltage discharge electrode dielectric layer, a high-voltage discharge electrode dielectric layer and a high-voltage discharge electrode.
Furthermore, the filtering layer is filled with active carbon or other solid matters capable of adsorbing gas and is fixed at the air inlet end.
Furthermore, the low-temperature plasma generator is of a sleeve-shaped structure, a cavity for gas to pass through is arranged in the middle of the low-temperature plasma generator, and a plurality of low-temperature plasma generators are assembled in parallel and are arranged perpendicular to the direction of the gas flow.
Furthermore, the wind shields are positioned in a gap part outside the low-temperature plasma generator, and gaps between the front end of a ventilation duct in the middle of the low-temperature plasma generator behind the wind equalizing layer and the side wall of the air outlet end and the low-temperature plasma generator are used for blocking gas, so that the gas passes through the low-temperature plasma generator from the upper side and the lower side.
Further, the voltage regulator comprises a direct current voltage regulator and a high-frequency voltage regulator, wherein the direct current voltage regulator is connected to two ends of the spiral coil, and the high-frequency voltage regulator is connected to the discharge electrode.
Furthermore, the spiral coil is uniformly wound outside the plasma low-temperature plasma generator, and two ends of the spiral coil are respectively connected with the anode and the cathode of the direct-current voltage regulator.
Furthermore, the low-voltage discharge electrode is made of copper or stainless steel, wraps outside the dielectric layer of the low-voltage discharge electrode, is connected with the negative electrode of the high-frequency voltage regulator, and is grounded.
Furthermore, the low-voltage discharge electrode dielectric layer is in a hollow round tube shape and is made of quartz or ceramic.
Furthermore, the high-voltage discharge electrode dielectric layer is in a hollow cylinder shape and made of quartz or ceramic, and is fixed at the center of the hollow circular tube of the low-voltage discharge electrode dielectric layer through a fixing frame.
Furthermore, the high-voltage discharge electrode can be rod-shaped, linear or zigzag, is made of copper or tungsten, is arranged in the high-voltage discharge electrode dielectric layer, and is connected with the anode of the high-frequency voltage regulator at the outer end.
The invention provides a device for treating waste gas based on electromagnetic induction coupling double-medium low-temperature plasma, which has the beneficial effects that:
1. the low-temperature plasma generator set is arranged in a direction perpendicular to the direction of the air flow, so that the retention time of waste gas in the plasma atmosphere is greatly prolonged.
2. The invention utilizes the energizing solenoid coil to generate a magnetic field by the electromagnetic induction principle, the strength of the magnetic field can be adjusted by the magnitude of the energizing voltage, so that the charged high-energy ions excited by the low-temperature plasma are uniformly distributed, the contact area with the waste gas is larger, and the waste gas treatment is more efficient.
3. The invention combines the energized solenoid coil with the low-temperature plasma generator, and utilizes the magnetic field to distribute charged ions generated by the low-temperature plasma generator in the whole space, thereby obtaining more plasmas in a wider range and playing an important role in energy conservation and consumption reduction.
4. The invention utilizes double media, so that the discharge between the high-voltage electrode and the low-voltage electrode is more stable, the damage of the discharge to the electrodes is avoided, and the service life of the device is prolonged.
5. The invention has simple and convenient assembly, easy operation, small occupied area and no hidden danger of secondary pollution.
Drawings
Fig. 1 is a schematic structural diagram of an electromagnetic induction coupling based dual-medium low-temperature plasma exhaust gas treatment device according to the present invention.
Fig. 2 is a schematic structural view of a low-temperature plasma generator in the present invention.
In the figure: 1. the plasma generator comprises an air inlet, a filter layer, an air equalizing layer, a wind shield, a low-temperature plasma generator, a high-voltage discharge electrode dielectric layer, a low-voltage discharge electrode dielectric layer, a shell, a spiral coil, a voltage regulator and an air outlet, wherein the filter layer is 2, the air equalizing layer is 3, the wind shield is 4, the low-temperature plasma generator is 5, the high-voltage discharge electrode is 51, the high-voltage discharge electrode dielectric layer is 52, the low.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The invention will be described in further detail with reference to the following drawings and specific embodiments.
Fig. 1 shows a schematic diagram of an exhaust gas treatment device based on electromagnetic induction coupling dual-medium low-temperature plasma according to an embodiment of the invention. Referring to fig. 1 and 2, the electromagnetic induction coupling-based dual-medium low-temperature plasma waste gas treatment device comprises an air inlet 1, a filter layer 2, an air equalizing layer 3, a wind shield 4, a low-temperature plasma generator group, a voltage regulator 6 and an air outlet 7, wherein the low-temperature plasma generator group consists of a plurality of low-temperature plasma generators 5, and each low-temperature plasma generator 5 further comprises a shell 55, a solenoid 56, a low-voltage discharge electrode 54, a low-voltage discharge electrode dielectric layer 53, a high-voltage discharge electrode dielectric layer 52 and a high-voltage discharge electrode 51.
Wherein, the filter layer 2 is filled with active carbon or other solid matters capable of adsorbing gas and is fixed at the end of the air inlet 1.
The low-temperature plasma generator 5 is a sleeve-shaped structure, a cavity for gas to pass through is arranged in the middle of the low-temperature plasma generator, and a plurality of low-temperature plasma generators are assembled in parallel and are arranged perpendicular to the direction of gas flow.
The wind shields 4 are located in the gap outside the low-temperature plasma generator 5, and in the gap between the front end of the ventilation duct in the middle of the low-temperature plasma generator 5 behind the wind equalizing layer 3 and the side wall of the wind outlet end and the low-temperature plasma generator 5, and are used for blocking gas so that the gas passes through the low-temperature plasma generator 5 from the upper side and the lower side.
The voltage regulator 6 includes a dc voltage regulator connected to both ends of the solenoid 56 and a high frequency voltage regulator connected to the discharge electrode.
The spiral coil 56 is uniformly wound outside the plasma low-temperature plasma generator 5, and two ends of the spiral coil are respectively connected to the positive electrode and the negative electrode of the direct-current voltage regulator.
The low-voltage discharge electrode 54 is made of copper or stainless steel, wraps the low-voltage discharge electrode dielectric layer 53, is connected to the negative electrode of the high-frequency voltage regulator, and is grounded.
The low-voltage discharge electrode dielectric layer 53 is in a hollow round tube shape and is made of quartz or ceramic.
The high-voltage discharge electrode dielectric layer 52 is hollow cylinder-shaped, is made of quartz or ceramic, and is fixed at the center of the hollow circular tube of the low-voltage discharge electrode dielectric layer 53.
The high-voltage discharge electrode 51 may be rod-shaped, linear or zigzag, is made of copper or tungsten, is disposed in the high-voltage discharge electrode dielectric layer 52, and has an outer end connected to the anode of the high-frequency voltage regulator.
The low-temperature plasma generator set is arranged perpendicular to the direction of the air flow, after waste gas enters the device, solid matters in the waste gas are adsorbed by the filter layer 2, the waste gas flows upwards and downwards under the action of the flow equalizing layer 3 and the wind shield 4, and then enters the middle air duct to be discharged after passing through the low-temperature plasma generator 5, so that the retention time of the waste gas in a plasma atmosphere is greatly prolonged, meanwhile, the magnetic field is generated by the electrified solenoid coil, the strength of the magnetic field is adjusted by adjusting the voltage of the electrified solenoid coil, charged high-energy ions excited by the low-temperature plasma generator are uniformly distributed, the contact area with the waste gas is larger, and the waste gas treatment is more efficient.
The relationships depicted in the drawings are for purposes of illustration only and are not to be construed as limitations of the present patent, and it should be understood that the above-described embodiments of the present invention are merely illustrative for clearly illustrating the present invention and are not limitations of the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (1)
1. Based on two medium low temperature plasma exhaust treatment device of electromagnetic induction coupling, its characterized in that: the low-temperature plasma generator set comprises a plurality of low-temperature plasma generators, and each low-temperature plasma generator comprises a shell, a spiral coil, a low-voltage discharge electrode dielectric layer, a high-voltage discharge electrode dielectric layer and a high-voltage discharge electrode;
the filtering layer is filled with active carbon or other solid matters capable of adsorbing gas and is fixed at the air inlet end;
the low-temperature plasma generator is of a sleeve-shaped structure, a cavity for gas to pass through is arranged in the middle of the low-temperature plasma generator, and a plurality of low-temperature plasma generators are assembled in parallel and are arranged perpendicular to the direction of gas flow;
the wind shields are positioned in a gap part outside the low-temperature plasma generator, and in a gap between the front end of a ventilation duct in the middle of the low-temperature plasma generator behind the wind equalizing layer and the side wall of the air outlet end and the low-temperature plasma generator, and are used for blocking gas so that the gas passes through the low-temperature plasma generator from the upper side and the lower side;
the voltage regulator comprises a direct current voltage regulator and a high-frequency voltage regulator, wherein the direct current voltage regulator is connected to two ends of the spiral coil, and the high-frequency voltage regulator is connected to the discharge electrode;
the spiral coil is uniformly wound outside the plasma generator, and two ends of the spiral coil are respectively connected with the anode and the cathode of the direct-current voltage regulator;
the low-voltage discharge electrode is made of copper or stainless steel, wraps outside a dielectric layer of the low-voltage discharge electrode, is connected to the negative electrode of the high-frequency voltage regulator, and is grounded;
the low-voltage discharge electrode dielectric layer is in a hollow round tube shape and is made of quartz or ceramic;
the high-voltage discharge electrode dielectric layer is in a hollow cylinder shape and made of quartz or ceramic, and is fixed at the central position of the hollow circular tube of the low-voltage discharge electrode dielectric layer by a fixing frame;
the high-voltage discharge electrode can be rod-shaped, linear or zigzag, is made of copper or tungsten, is arranged in the high-voltage discharge electrode dielectric layer, and is connected with the anode of the high-frequency voltage regulator at the outer end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810156812.3A CN108339379B (en) | 2018-02-24 | 2018-02-24 | Electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device |
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| CN201810156812.3A CN108339379B (en) | 2018-02-24 | 2018-02-24 | Electromagnetic induction coupling-based double-medium low-temperature plasma waste gas treatment device |
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| CN108339379B true CN108339379B (en) | 2020-11-13 |
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| CN112853738B (en) * | 2021-01-05 | 2022-01-18 | 西南交通大学 | Plasma modification device based on electromagnetic field regulation and control |
| CN116966731B (en) * | 2023-09-22 | 2024-01-02 | 离享未来(德州)等离子科技有限公司 | Low-temperature plasma underground gas treatment device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835336A (en) * | 2010-05-21 | 2010-09-15 | 江苏大学 | Double-dielectric barrier discharge low-temperature plasma generator |
| CN101856581A (en) * | 2009-04-02 | 2010-10-13 | 澄明科技有限公司 | Control method of plasma by magnetic field in an exhaust gas treating apparatus and an exhaust gas treating apparatus using the same |
| CN205495305U (en) * | 2016-04-18 | 2016-08-24 | 厦门爱迪特环保科技有限公司 | Low temperature plasma exhaust treatment device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856581A (en) * | 2009-04-02 | 2010-10-13 | 澄明科技有限公司 | Control method of plasma by magnetic field in an exhaust gas treating apparatus and an exhaust gas treating apparatus using the same |
| CN101835336A (en) * | 2010-05-21 | 2010-09-15 | 江苏大学 | Double-dielectric barrier discharge low-temperature plasma generator |
| CN205495305U (en) * | 2016-04-18 | 2016-08-24 | 厦门爱迪特环保科技有限公司 | Low temperature plasma exhaust treatment device |
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Effective date of registration: 20201023 Address after: Room 1 South, no.328, Changxing Road, Jiulong Town, Taizhou City, Jiangsu Province 225300 Applicant after: Taizhou Yuanchuang New Material Technology Co.,Ltd. Address before: 528100 Guangdong city in Foshan Province, Leping Town, Sanshui District, Times Square classic area two (not including the day surface) No. 45 (home declaration) Applicant before: FOSHAN WANSHAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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