CN101229484A - Corona discharge plasma reactor used for treating vehicle exhaust - Google Patents
Corona discharge plasma reactor used for treating vehicle exhaust Download PDFInfo
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- CN101229484A CN101229484A CNA2007101345396A CN200710134539A CN101229484A CN 101229484 A CN101229484 A CN 101229484A CN A2007101345396 A CNA2007101345396 A CN A2007101345396A CN 200710134539 A CN200710134539 A CN 200710134539A CN 101229484 A CN101229484 A CN 101229484A
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Abstract
The invention relates to a corona discharge plasma reactor used for treating automobile exhaust, which is a device making use of a corona discharge plasma system to remove HC, NOx, CO, particles and other contaminants in automobile exhausts. The invention comprises an insulated shell and a plurality of sets of electrodes connected in series and is characterized in that each set of electrodes of the cylindrical reactor adopts multi-needle-pore structure, multi-needle electrodes are discharge electrodes and round porous electrodes are ground electrodes; during assembling, the centers of the multi-needle and the pore are opposite. The invention has the advantages of high purifying efficiency for HC, NOx, CO, particles and other contaminants in automobile exhausts, small volume of the reactor, easy alteration of the configuration parameter and board application scope.
Description
Technical field
The present invention utilizes the corona discharge plasma system, removes a kind of device of pollutants such as hydrocarbon (HC), oxynitrides (NOx), carbon monoxide (CO), particle in the vehicle exhaust.
Background technology
Automobile uses traditional hydrocarbon fuels usually, and exhaust gas component is very complicated, wherein contains the bigger oxynitrides of environmental pollution (NOx), hydrocarbon (HC), carbon monoxide gaseous contaminant and pellets such as (CO).Therefore use not only contaminated environment of tail gas that the automobile of gasoline and diesel oil discharges, also can cause serious harm, caused extensive concern and attention human body.The technology of control motor vehicle exhaust emission at present mainly contains: pretreatment technology, emission controls by improving combustion technology and external purification technology etc.Pretreatment technology mainly comprises methods such as improving fuel qualities, use oil emulsion, employing substitute fuel; The emission controls by improving combustion technology is by the change of engine itself or increases the combustion position that some annex improves combustion mixture, suppresses the generation of pernicious gas, and the pernicious gas composition in the exhaust is reduced.More than two kinds of methods can reduce the generation of engine pollutant to a certain extent, but can not fundamentally eliminate harmful substance.And the continuous strictness that requires along with the automobile low emission, the difficulty of improving the internal combustion engine process is increasing, and the internal combustion engine that can take into account dynamic property, economy and emission performance will become increasingly complex, and cost sharply rises.Though the three-effect catalysis technology is quite ripe in the external purification technology, the exhaust resistance that exists catalysqt deactivation, catalytic cleaner to increase automobile makes effective power descend, will use the noble metal of resource scarcity and noble metal exhaust purifier may cause shortcomings such as secondary pollution to environment usually; The photocatalytic degradation technology exists also that quantum efficiency is low, reaction rate waits shortcoming slowly, also is difficult to economically and the competition of conventional green technology, the fine particulates in simultaneously can not cleaning of off-gas.
The nonequilibrium plasma technology have purification efficiency height, treatment effect good, can handle advantages such as multiple pollutant and non-secondary pollution simultaneously, at this field potentialization of purifying automobile tail gas.Adopt nonequilibrium plasma technical finesse vehicle exhaust at present, most dielectric barrier discharge or corona discharge reactors of containing discharge electrode and earthing pole of adopting carry out purified treatment, and what have combines with catalyst, all can obtain good pollutant removal.Patent rear tail gas purifier of car (CN1315614) is made up of inner, middle and outer layer electrode and medium circle etc., and low temperature plasma in the electric field and catalyst synergy can improve the tail gas clean-up rate; The integrated low temperature plasma catalytic reactor (CN1648425) that patent is used for tail gas clean-up is a kind of housing, honeycomb substrate catalyst, isostructural reactor of low temperature plasma generating means of comprising, its plasma producing apparatus mainly is made up of impulse generator and discharge assembly; Patent line-board-like pulsed discharge plasma generating means (CN2613966), its sparking electrode is made up of the framework of many discharge lines, sparking electrode and earth electrode constitute a discharge channel, utilize this plasma generating means to handle harmful gaseous pollutant, can improve the clearance of gaseous contaminant.Be used for the reactor that vehicle exhaust is handled at present, it is board-like etc. that its electrode structure mostly is coaxial circles column type, line cartridge type or line.Also there is the plasma space skewness in these reactors, and capacity usage ratio is not high, need the problems such as synergy of catalyst.
Summary of the invention
The objective of the invention is to propose a kind of processing method of vehicle exhaust efficiently and pin-pore structure plasma reaction device, plasma in this device is evenly distributed, the capacity usage ratio height can effectively be removed pollutants such as hydrocarbon (HC) in the actual vehicle exhaust, oxynitrides (NOx), carbon monoxide (CO), particle.
The objective of the invention is to be achieved through the following technical solutions:
A kind of corona discharge plasma reactor that is used for treating vehicle exhaust, its outward appearance is cylindrical, is made up of the electrode of insulation crust and many group series connection.Each group arrangement of electrodes all adopts pin-pore structure, and multistylus electrode is a discharge electrode, is made up of circular multistylus electrode plate and stainless pin; Circular porous electrode is an earthing pole.During this reactor assembling, pin is relative with the center in hole, and the pin hole spacing is 17-21mm; The pin diameter is distributed on the circular multistylus electrode plate less than 0.8mm; Bore dia is 5-7mm, is distributed on the pole plate of circular porous electrode.When applying certain high voltage to reactor, reactor produces corona discharge.The high energy electron of region of discharge, ion, excited state particle and have strong oxidizing property very can free radical isoreactivity species can have an effect with the polluter in the tail gas, it is removed.
Compared with the prior art, the present invention adopts many group pin-pore electrods, can produce more high energy electron, ion, excited state particle and have the very free radical isoreactivity species of strong oxidizing property energy at region of discharge, active specy is more evenly distributed, and can effectively handle the actual vehicle exhaust that contains multiple harmful constituent.Simultaneously, reactor volume is little, and the structural parameters malleable is applied widely.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
Fig. 2 is circular porous electrode structure schematic diagram.
Among the figure: 1 is air inlet; 2 is circular multistylus electrode plate; 3 is pin; 4 is circular porous electrode; 5 is insulation crust; 6 is the gas outlet; 7 is the hole.
The specific embodiment
Embodiment 1
As shown in Figure 1, plasma reactor is made up of the electrode of insulation crust 5 and three groups of series connection.Each group arrangement of electrodes all adopts pin-pore structure, and multistylus electrode is a discharge electrode, is made up of circular multistylus electrode plate 2 and stainless pin 3; Circular porous electrode 4 is an earthing pole.Wherein, circular multistylus electrode plate 2 diameters are 70mm, and stainless pin that 19 length is 8mm 3 is uniform on it, and the pin diameter is 0.8mm; The pole plate diameter of circular porous electrode 4 is 70mm, and hole that 19 diameters are 6mm 7 is uniform on it.During assembling, pin 3 is all relative with the center in hole 7, and the pin hole spacing is 21mm.Actual vehicle exhaust is that model is to produce under the condition of the normal constant speed operation of the petrol engine of HONDA EC2500L.During work, vehicle exhaust is fed reactor, apply certain high voltage to reactor simultaneously, make it to produce corona discharge by air inlet 1.When working gas is flowed through region of discharge, pollutants such as NOx wherein, HC, CO, particle just can with high energy electron, ion, the excited state particle of region of discharge and have strong oxidizing property very can free radical isoreactivity species have an effect, thereby it is removed, and the gas after the processing is 6 discharges through the gas outlet.Experiment condition is for the first time: discharge voltage 20kV, and discharge frequency is 40kHz, the working gas flow is 0.15m
3/ h; Experiment condition is for the second time: discharge voltage 18kV, and discharge frequency is 40kHz, the working gas flow is 0.1m
3/ h.Experimental result is as shown in table 1.
Embodiment 2
As shown in Figure 1, plasma reactor is made up of the electrode of insulation crust 5 and three groups of series connection.Each group arrangement of electrodes all adopts pin-pore structure, and multistylus electrode is a discharge electrode, is made up of circular multistylus electrode plate 2 and stainless pin 3; Circular porous electrode 4 is an earthing pole.Wherein, circular multistylus electrode plate 2 diameters are 70mm, and stainless pin that 19 length is 8mm 3 is uniform on it, and the pin diameter is 0.6mm; The pole plate diameter of circular porous electrode 4 is 70mm, and hole that 19 diameters are 5mm 7 is uniform on it.During assembling, pin 3 is all relative with the center in hole 7, and the pin hole spacing is 17mm.Actual vehicle exhaust is that model is to produce under the condition of the normal constant speed operation of the petrol engine of HONDA EC2500L.During work, vehicle exhaust is fed reactor, apply certain high voltage to reactor simultaneously, make it to produce corona discharge by air inlet 1.When working gas is flowed through region of discharge, pollutants such as NOx wherein, HC, CO, particle just can with high energy electron, ion, the excited state particle of region of discharge and have strong oxidizing property very can free radical isoreactivity species have an effect, thereby it is removed, and the gas after the processing is 6 discharges through the gas outlet.Experiment condition is for the first time: discharge voltage 20kV, and discharge frequency is 40kHz, the working gas flow is 0.15m
3/ h; Experiment condition is for the second time: discharge voltage 18kV, and discharge frequency is 40kHz, the working gas flow is 0.1m
3/ h.Experimental result is as shown in table 1.
Embodiment 3
The plasma reactor that employing is made up of the electrode of insulation crust and two groups of series connection is handled vehicle exhaust, and other experiment conditions are with embodiment 1.Experimental result is as shown in table 1.
Comparative Examples
Adopt traditional line barrel plasma reactor, reactor inside diameter is 70mm, and reaction zone length is with embodiment 1.Actual vehicle exhaust is that model is to produce under the condition of the normal constant speed operation of the petrol engine of HONDA EC2500L.During work, by air inlet vehicle exhaust is fed reactor, apply certain high voltage to reactor simultaneously, make it to produce corona discharge, the gas after the processing is discharged through the gas outlet.Experiment condition is for the first time: discharge voltage 20kV, and discharge frequency is 40kHz, the working gas flow is 0.15m
3/ h; Experiment condition is for the second time: discharge voltage 18kV, and discharge frequency is 40kHz, the working gas flow is 0.1m
3/ h.Experimental result is as shown in table 1.
Experimental result under table 1 different condition
| Test for the first time clearance (%) | Test for the second time clearance (%) | |||||||
| ?NO | ?HC | ?CO | Particle | NO | ?HC | ?CO | Particle | |
| Embodiment 1 | ?85.5 | ?88.2 | ?86.3 | ?63.9 | ?87.3 | ?91.3 | ?88.7 | ?65.1 |
| Embodiment 2 | ?89.3 | ?92.1 | ?91.5 | ?64.8 | ?90.2 | ?92.5 | ?91.5 | ?67.6 |
| Embodiment 3 | ?80.2 | ?85.7 | ?83.4 | ?57.2 | ?81.7 | ?85.6 | ?84.3 | ?59.1 |
| Comparative Examples | ?58.1 | ?60.2 | ?57.9 | ?28.1 | ?59.3 | ?63.5 | ?57.8 | ?30.5 |
By as can be seen above, than traditional plasma reactor height, and removal effect is good to the clearance of pollutant in the petrol engine tail gas in the present invention.
Claims (4)
1. corona discharge plasma reactor that is used for treating vehicle exhaust, electrode by insulation crust and many group series connection is formed, it is characterized in that each group arrangement of electrodes of cylindrical reactor all adopts pin-pore structure, multistylus electrode is a discharge electrode, and circular porous electrode is an earthing pole.
2. corona discharge plasma reactor according to claim 1 is characterized in that: multistylus electrode is made up of circular multistylus electrode plate (2) and pin (3), and the pin diameter is distributed on the circular multistylus electrode plate less than 0.8mm.
3. corona discharge plasma reactor according to claim 1 is characterized in that: hole (7) diameter of circular porous electrode (4) is 5-7mm, is distributed on the pole plate of circular porous electrode.
4. corona discharge plasma reactor according to claim 1 is characterized in that: during assembling, pin (3) is relative with the center of hole (7), and the pin hole spacing is 17-21mm.
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| CNA2007101345396A CN101229484A (en) | 2007-10-29 | 2007-10-29 | Corona discharge plasma reactor used for treating vehicle exhaust |
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| CNA2007101345396A CN101229484A (en) | 2007-10-29 | 2007-10-29 | Corona discharge plasma reactor used for treating vehicle exhaust |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280217A (en) * | 2011-04-14 | 2011-12-14 | 宁波大学 | Enameling machine cluster including mechanism of using corona to stimulate tail gas purification |
| CN102310063A (en) * | 2010-06-29 | 2012-01-11 | 中国科学院微电子研究所 | Cleaning system for honeycomb-shaped plasma free radicals |
| CN102703421A (en) * | 2012-06-18 | 2012-10-03 | 那日 | Method for mutating flavomycin producing bacteria by using high-voltage corona electric field and high-voltage corona electric field device thereof |
| CN102958264A (en) * | 2012-11-20 | 2013-03-06 | 浙江大学 | Plasma generation device and method based on back corona creeping-surface breakdown of catalyst as well as application thereof |
| CN103097678A (en) * | 2011-08-25 | 2013-05-08 | 丰田自动车株式会社 | Exhaust gas purifier for internal combustion engine |
| CN103301728A (en) * | 2013-06-17 | 2013-09-18 | 南京大学 | Device for treating malodorous gas based on capacitive coupling partition discharge plasma |
| CN103352739A (en) * | 2013-06-28 | 2013-10-16 | 浙江佩洁尔医疗科技有限公司 | Automobile exhaust purifier |
| CN103352744A (en) * | 2013-06-17 | 2013-10-16 | 浙江佩洁尔医疗科技有限公司 | Automobile exhaust plasma purifier |
| CN104791052A (en) * | 2015-03-17 | 2015-07-22 | 西安鹏光环保科技有限责任公司 | Plasma automobile exhaust treatment device |
| CN105650741A (en) * | 2016-03-24 | 2016-06-08 | 浙江高鼎净化科技有限公司 | Variable-frequency variable-pressure electronic type efficient air purifier |
| CN105909344A (en) * | 2016-04-14 | 2016-08-31 | 三明学院 | Eddy zone waste gas treatment system and method |
| CN106686872A (en) * | 2017-02-09 | 2017-05-17 | 江苏升元菲尔科技发展有限公司 | Panel tip discharge type plasma generator |
| CN106949552A (en) * | 2017-04-27 | 2017-07-14 | 北京立道立德环保设备有限责任公司 | The environmental improvement device and its control system and control method of a kind of underground piping |
| CN108548246A (en) * | 2018-04-29 | 2018-09-18 | 航天慧能（江苏）环境工程有限公司 | Plasma fresh air system based on internet of things |
| CN108601196A (en) * | 2018-04-29 | 2018-09-28 | 航天慧能（江苏）环境工程有限公司 | The matrix plasma apparatus of fresh air system based on Internet of Things |
| CN108601191A (en) * | 2018-05-21 | 2018-09-28 | 王逸人 | Array double-dielectric barrier discharge device |
| CN111530395A (en) * | 2020-05-08 | 2020-08-14 | 中国科学院长春应用化学研究所 | Reaction device for preparing catalyst by electrifying |
| CN111810274A (en) * | 2020-07-16 | 2020-10-23 | 平湖爱之馨环保科技有限公司 | Automobile exhaust purification device |
| CN114832590A (en) * | 2022-06-29 | 2022-08-02 | 浙大城市学院 | Array type multi-needle coaxial high-efficiency processing low-temperature plasma reactor |
| CN116040750A (en) * | 2023-02-07 | 2023-05-02 | 沈阳工业大学 | Direct-current corona needle plate discharge reactor for removing azo dye in wastewater |
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2007
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310063A (en) * | 2010-06-29 | 2012-01-11 | 中国科学院微电子研究所 | Cleaning system for honeycomb-shaped plasma free radicals |
| CN102280217A (en) * | 2011-04-14 | 2011-12-14 | 宁波大学 | Enameling machine cluster including mechanism of using corona to stimulate tail gas purification |
| CN103097678A (en) * | 2011-08-25 | 2013-05-08 | 丰田自动车株式会社 | Exhaust gas purifier for internal combustion engine |
| CN103097678B (en) * | 2011-08-25 | 2015-04-08 | 丰田自动车株式会社 | Exhaust gas purifier for internal combustion engine |
| CN102703421A (en) * | 2012-06-18 | 2012-10-03 | 那日 | Method for mutating flavomycin producing bacteria by using high-voltage corona electric field and high-voltage corona electric field device thereof |
| CN102958264A (en) * | 2012-11-20 | 2013-03-06 | 浙江大学 | Plasma generation device and method based on back corona creeping-surface breakdown of catalyst as well as application thereof |
| CN102958264B (en) * | 2012-11-20 | 2015-04-22 | 浙江大学 | Plasma generation device and method based on back corona creeping-surface breakdown of catalyst as well as application thereof |
| CN103301728B (en) * | 2013-06-17 | 2015-04-22 | 南京大学 | Device for treating malodorous gas based on capacitive coupling partition discharge plasma |
| CN103301728A (en) * | 2013-06-17 | 2013-09-18 | 南京大学 | Device for treating malodorous gas based on capacitive coupling partition discharge plasma |
| CN103352744A (en) * | 2013-06-17 | 2013-10-16 | 浙江佩洁尔医疗科技有限公司 | Automobile exhaust plasma purifier |
| CN103352739B (en) * | 2013-06-28 | 2016-10-05 | 浙江佩洁尔医疗科技有限公司 | A kind of automobile exhaust purifier |
| CN103352739A (en) * | 2013-06-28 | 2013-10-16 | 浙江佩洁尔医疗科技有限公司 | Automobile exhaust purifier |
| CN104791052A (en) * | 2015-03-17 | 2015-07-22 | 西安鹏光环保科技有限责任公司 | Plasma automobile exhaust treatment device |
| CN105650741A (en) * | 2016-03-24 | 2016-06-08 | 浙江高鼎净化科技有限公司 | Variable-frequency variable-pressure electronic type efficient air purifier |
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| CN105909344A (en) * | 2016-04-14 | 2016-08-31 | 三明学院 | Eddy zone waste gas treatment system and method |
| CN105909344B (en) * | 2016-04-14 | 2018-08-31 | 三明学院 | Vortex exhaust treatment system and method |
| CN106686872A (en) * | 2017-02-09 | 2017-05-17 | 江苏升元菲尔科技发展有限公司 | Panel tip discharge type plasma generator |
| CN106949552A (en) * | 2017-04-27 | 2017-07-14 | 北京立道立德环保设备有限责任公司 | The environmental improvement device and its control system and control method of a kind of underground piping |
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| CN108601196A (en) * | 2018-04-29 | 2018-09-28 | 航天慧能（江苏）环境工程有限公司 | The matrix plasma apparatus of fresh air system based on Internet of Things |
| CN108548246B (en) * | 2018-04-29 | 2021-02-19 | 安徽航天环境工程有限公司 | Plasma new trend system based on thing networking |
| CN108601191A (en) * | 2018-05-21 | 2018-09-28 | 王逸人 | Array double-dielectric barrier discharge device |
| CN111530395A (en) * | 2020-05-08 | 2020-08-14 | 中国科学院长春应用化学研究所 | Reaction device for preparing catalyst by electrifying |
| CN111810274A (en) * | 2020-07-16 | 2020-10-23 | 平湖爱之馨环保科技有限公司 | Automobile exhaust purification device |
| CN111810274B (en) * | 2020-07-16 | 2022-01-21 | 平湖爱之馨环保科技有限公司 | Automobile exhaust purification device |
| CN114832590A (en) * | 2022-06-29 | 2022-08-02 | 浙大城市学院 | Array type multi-needle coaxial high-efficiency processing low-temperature plasma reactor |
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Open date: 20080730 |