CN104847452A - Plasma and electrostatic adsorption coupled automobile emission purifier and purification method - Google Patents
Plasma and electrostatic adsorption coupled automobile emission purifier and purification method Download PDFInfo
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Abstract
The invention discloses a plasma and electrostatic adsorption coupled automobile emission purifier and purification method and belongs to the technical field of automobile emission purification. The plasma and electrostatic adsorption coupled automobile emission purifier and purification method are aimed to solve the problems of bad universality and bad processing effect of an existing automobile emission processing technology. The purifier comprises an emission purification pipe, a glass slideway, a sinusoidal high-voltage electrode, a direct-current high-voltage electrode and a grounding electrode, the emission purification pipe is divided into an emission lead-in region, a plasma processing zone, a transition zone, a static dust removing zone and an emission discharge zone in sequence from the head end to the end, the glass slideway is fixed on the outer surface of the bottom of the emission purification pipe, and the grounding electrode is arranged on the glass slideway in a sliding mode. The purification method includes that cooling the automobile emission at the emission lead-in zone; respectively carrying out plasma reaction and high-voltage static dust removing on the automobile emission in the plasma processing zone and the static dust removing zone; enabling the grounding electrode to slowly move out of the plasma processing zone to be corresponding to the static dust removing zone. The plasma and electrostatic adsorption coupled automobile emission purifier and purification method are used for the automobile emission purification.
Description
Technical field
The present invention relates to automobile exhaust purifier and purification method that plasma is coupled with Electrostatic Absorption, belong to purifying vehicle exhaust technical field.
Background technique
Our times automobile pollution increases sharply, and for China, automobile pollution just increases sharply with the annual growth of 13 ~ 15%, ends 2014, and the total recoverable amount of automobile of China has reached 1.37 hundred million.Because the exhaust emissions factor of automobile is high, the black smoke particulate matter in tail gas, NOx, CO and HC etc. have become main atmospheric pollution sources.According to display such as " Jing-jin-ji region, the Yangtze River Delta, region, Pearl River Delta and municipality directly under the Central Government, provincial capital and cities specifically designated in the state plan 74 annual air quality reports in city 2013 " that Chinese Ministry of Environmental Protection 2014 issues, the primary pollutant in 74 cities is pellet PM2.5, next is PM10, and 74 cities all trend towards the compound pollution transportation mutually superposed from traditional coal-smoke pollution to automobile exhaust pollution and secondary pollution.Therefore, the pollution control carrying out vehicle exhaust become current extremely urgent environmental protection work.
For the gas such as soot particulate matter and CO, NOx in vehicle exhaust, traditional exhaust gas treating method employing catalysis technique processes the fixed gas composition in tail gas, reaches the effect of reduced exhaust; This catalysis technique needs kind and the content of organizing catalyzer for different exhaust gas components, and it is subject to certain constraint in the vent gas treatment of reality.Discharge plasma technique produces a large amount of high-energy electrons by gaseous discharge, has very strong oxidability and chemism, has good treatment effect to Small molecular such as CO, NOx, is a kind of emerging tail gas disposal technique.But, chemical reaction needs certain hour, and the mass rate of emission of vehicle exhaust is higher, when particularly will reach real-time treatment effect, exhaust gas component waiting time in purifier is shorter, plasma will decline to macromolecular Processing capacity, makes the deleterious that in tail gas, large molecular carbon particulate matter is removed.
Summary of the invention
The present invention seeks to solve existing vehicle maintenance service technology poor universality, the problem of poor processing effect, providing automobile exhaust purifier and purification method that a kind of plasma is coupled with Electrostatic Absorption.
The automobile exhaust purifier that plasma of the present invention is coupled with Electrostatic Absorption, it comprises tail gas clean-up pipe, glass slideway, sinusoidal high-field electrode, high direct voltage electrode and ground electrode,
Tail gas clean-up pipe is nonmetal cuboid pipe, and tail gas clean-up pipe is divided into tail gas to introduce district, plasma treatment district, transition zone, electrostatic precipitation district and tail gas discharge zone by head end to end successively, and tail gas is introduced district and arranged cooling device;
Glass slideway is fixed on the outer surface of tail gas clean-up pipe bottom surface, and ground electrode is slidably arranged on glass slideway;
Sinusoidal high-field electrode is embedded on the outer surface of tail gas clean-up pipe end face, and the position of sinusoidal high-field electrode on tail gas clean-up pipe is corresponding with plasma treatment district, and the length of sinusoidal high-field electrode is identical with the length in plasma treatment district;
High direct voltage electrode is embedded on the outer surface of tail gas clean-up pipe end face, and the position of high direct voltage electrode on tail gas clean-up pipe is corresponding with electrostatic precipitation district, and the length of high direct voltage electrode is equal with the length in electrostatic precipitation district;
The length of ground electrode is greater than or equal to the total length in plasma treatment district, transition zone and electrostatic precipitation district, the length of glass slideway is less than the length of tail gas clean-up pipe, the length of glass slideway makes ground electrode when sliding to the direction of tail gas discharge zone, and at least the head end of ground electrode enters transition zone; The head end of ground electrode is corresponding with the head end of tail gas clean-up pipe.
Tail gas clean-up pipe is quartz glass tube.
The supply voltage that described sinusoidal high-field electrode connects is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz.
Described sinusoidal high-field electrode, high direct voltage electrode and ground electrode are stainless steel electrode.
The length of described tail gas clean-up pipe is 300mm, and substantially horizontal width is 100mm, and the distance between short transverse two apparent surface is 5mm; The length of glass slideway is 280mm, and wide is 80mm; Glass slideway is fixed on the outer surface of tail gas clean-up pipe bottom surface between two parties;
The length of ground electrode is 200mm, and wide is 80mm;
Tail gas introduce district, plasma treatment district, transition zone, electrostatic precipitation district and tail gas discharge zone length be respectively 10mm, 80mm, 40mm, 80mm and 90mm.
Based on a purifying vehicle exhaust method for the automobile exhaust purifier that plasma is coupled with Electrostatic Absorption, it comprises the following steps:
Step one: apply sinusoidal high-voltage power between sinusoidal high-field electrode and ground electrode, this sinusoidal high-voltage power voltage is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz; Between high direct voltage electrode and ground electrode, apply DC electrical source, this direct current power source voltage is 5kV; By ground electrode ground connection;
Step 2: use gas-guide pipeline vehicle exhaust to be introduced tail gas and introduce district, tail gas introducing district steadily introduces plasma treatment district after carrying out cooling process to vehicle exhaust;
Step 3: make ground electrode correspond to plasma treatment district, transition zone and electrostatic precipitation district, makes to enter plasma treatment district until the vehicle exhaust in electrostatic precipitation district carries out plasma reaction and high-pressure electrostatic precipitation;
Step 4: behind preheating setting time interval, to direction, tail gas discharge zone mobile grounding electrode, make ground electrode slowly shift out plasma treatment district, district is corresponding with electrostatic precipitation, realize the purification of vehicle exhaust thus, the vehicle exhaust after purification is discharged via tail gas discharge zone.
Advantage of the present invention: discharge plasma technique and high direct voltage electrostatic precipitator technology combine by the present invention, by rational structural design, to obtain in the tail gas environment of flowing discharge plasma to the strengthening of high direct voltage electrostatic precipitation effect, with the effect of both realizations associated treatment, improve the real-time treatment effect to large molecular carbon particulate matter.
The present invention by plasma and Electrostatic Absorption technology combined, strengthen the treatment effect of vehicle exhaust.According to the position of the operation conditions regulated ground electrode of automobile, the adjustment to purifier consumed power can be realized.Tail gas clean-up region is divided into two parts by it, plasma treatment district corresponds to sinusoidal high-field electrode, electrostatic precipitation district corresponds to high direct voltage electrode, Liang Ge vent gas treatment district can process tail gas simultaneously, therefore enhance the real-time treatment effect to large molecular carbon particulate matter, there is low energy consumption, high efficiency, free of contamination advantage, achieve the continuously adjustabe of purifier consumed power, thus solve that conventional purge device power consumption is large, treatment effeciency is low, bulky shortcoming, in vehicle maintenance service, there is huge development prospect.
The Dominant Facies of the advantage of plasma treatment small-molecule substance and Electrostatic Absorption technical finesse macromolecular particle thing combines by the present invention, and the feature of the charged ratio of tail gas and carrying capacity when utilizing plasma treatment tail gas, can be increased, increase the adsorption efficiency in Electrostatic Absorption region further.It adopts two vent gas treatment regions to share the mode of the ground electrode that can be slided, and achieves the continuously adjustabe to discharge power, regulates the discharge power of purifier, thus significantly reduce the energy consumption for the treatment of device according to the operation conditions of automobile.
The present invention's two intercalation electrodes utilize glass slideway to prevent between two high-field electrodes and produce disruptive discharge, and the tip that Embedded structure it also avoid electrode rim place directly contacts with air, prevents point discharge.Adopt Electrostatic Absorption technical finesse particulate matter, electrostatic adsorption device is consumed power not, and this is for highly beneficial the very limited mobile unit of energy storage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automobile exhaust purifier that plasma of the present invention is coupled with Electrostatic Absorption;
Fig. 2 is the side view of Fig. 1.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, the automobile exhaust purifier that plasma described in present embodiment is coupled with Electrostatic Absorption, it is characterized in that, it comprises tail gas clean-up pipe 1, glass slideway 2, sinusoidal high-field electrode 3, high direct voltage electrode 4 and ground electrode 5
Tail gas clean-up pipe 1 is nonmetal cuboid pipe, tail gas clean-up pipe 1 is divided into tail gas to introduce district 1-1, plasma treatment district 1-2, transition zone 1-3, electrostatic precipitation district 1-4 and tail gas discharge zone 1-5 by head end to end successively, and tail gas is introduced district 1-1 and arranged cooling device;
Glass slideway 2 is fixed on the outer surface of tail gas clean-up pipe 1 bottom surface, and ground electrode 5 is slidably arranged on glass slideway 2;
Sinusoidal high-field electrode 3 is embedded on the outer surface of tail gas clean-up pipe 1 end face, and the position of sinusoidal high-field electrode 3 on tail gas clean-up pipe 1 is corresponding with plasma treatment district 1-2, and the length of sinusoidal high-field electrode 3 is identical with the length of plasma treatment district 1-2;
High direct voltage electrode 4 is embedded on the outer surface of tail gas clean-up pipe 1 end face, and the position of high direct voltage electrode 4 on tail gas clean-up pipe 1 is corresponding with electrostatic precipitation district 1-4, and the length of high direct voltage electrode 4 is equal with the length of electrostatic precipitation district 1-4;
The length of ground electrode 5 is greater than or equal to the total length of plasma treatment district 1-2, transition zone 1-3 and electrostatic precipitation district 1-4, the length of glass slideway 2 is less than the length of tail gas clean-up pipe 1, the length of glass slideway 2 makes ground electrode 5 when sliding to the direction of tail gas discharge zone 1-5, and at least the head end of ground electrode 5 enters transition zone 1-3; The head end of ground electrode 5 is corresponding with the head end of tail gas clean-up pipe 1.
Embodiment two: present embodiment is described further mode of execution one, tail gas clean-up pipe 1 is quartz glass tube.
Embodiment three: present embodiment is described further mode of execution one or two, the supply voltage that described sinusoidal high-field electrode 3 connects is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz.
Embodiment four: present embodiment is described further mode of execution one, two or three, described sinusoidal high-field electrode 3, high direct voltage electrode 4 and ground electrode 5 are stainless steel electrode.
Embodiment five: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, present embodiment is described further mode of execution one, two, three or four, the length of described tail gas clean-up pipe 1 is 300mm, and substantially horizontal width is 100mm, and the distance between short transverse two apparent surface is 5mm; The length of glass slideway 2 is 280mm, and wide is 80mm; Glass slideway 2 is fixed on the outer surface of tail gas clean-up pipe 1 bottom surface between two parties;
The length of ground electrode 5 is 200mm, and wide is 80mm;
The length of tail gas introducing district 1-1, plasma treatment district 1-2, transition zone 1-3, electrostatic precipitation district 1-4 and tail gas discharge zone 1-5 is respectively 10mm, 80mm, 40mm, 80mm and 90mm.
In present embodiment, the thickness selecting tail gas clean-up pipe 1 is 2mm, the head end face 10mm of the first end face distance tail gas clean-up pipe 1 of glass slideway 2, the terminal surface 10mm of the terminal surface distance tail gas clean-up pipe 1 of glass slideway 2, vehicle exhaust is entered by the head end face of tail gas clean-up pipe 1, and terminal surface is discharged.
The length of sinusoidal high-field electrode 3 and high direct voltage electrode 4 and be widely respectively 80mm*80mm, its thickness is 1mm, high direct voltage electrode 4 and sinusoidal high-field electrode 3 interval 40mm, the head end 130mm of the head end distance tail gas clean-up pipe 1 of high direct voltage electrode 4.
Embodiment six: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, the purifying vehicle exhaust method of automobile exhaust purifier of present embodiment for being coupled with Electrostatic Absorption based on mode of execution one to mode of execution five plasma described in one of them, it comprises the following steps:
Step one: apply sinusoidal high-voltage power between sinusoidal high-field electrode 3 and ground electrode 5, this sinusoidal high-voltage power voltage is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz; Between high direct voltage electrode 4 and ground electrode 5, apply DC electrical source, this direct current power source voltage is 5kV; By ground electrode 5 ground connection;
Step 2: use gas-guide pipeline vehicle exhaust to be introduced tail gas and introduce district 1-1, tail gas introducing district 1-1 steadily introduces plasma treatment district 1-2 after carrying out cooling process to vehicle exhaust;
Step 3: make ground electrode 5 correspond to plasma treatment district 1-2, transition zone 1-3 and electrostatic precipitation district 1-4, make to enter plasma treatment district 1-2 until the vehicle exhaust of electrostatic precipitation district 1-4 carries out plasma reaction and high-pressure electrostatic precipitation;
Step 4: behind preheating setting time interval, to 1-5 direction, tail gas discharge zone mobile grounding electrode 5, ground electrode 5 is made slowly to shift out plasma treatment district 1-2, corresponding with electrostatic precipitation district 1-4, realize the purification of vehicle exhaust thus, the vehicle exhaust after purification is discharged via tail gas discharge zone 1-5.
When vehicle exhaust enters plasma treatment district 1-2, discharge between sinusoidal high-field electrode 3 and ground electrode 5, produce plasma, process vehicle exhaust, and the particulate matter in tail gas is carried out further charged, then between high direct voltage electrode 4 and ground electrode 5, strong electrostatic field is produced, the remaining charged particle thing of adsorption treatment.
In present embodiment, by sinusoidal for a certain output termination of sinusoidal high-voltage power high-field electrode 3, another output terminal of sinusoidal high-voltage power is received ground electrode 5 together with the earth polar of sinusoidal high-voltage power; Connect positive source with high direct voltage electrode 4, connect power cathode with ground electrode 5, then by ground electrode 5 reliable ground.
Define sinusoidal high-field electrode 3 and be A district with the region of the longitudinal overlap of ground electrode 5, can low temperature plasma be produced in A district, the Small molecular harmful matters such as NOx, the CO in tail gas be processed, and charged and certain process is carried out to macromolecular particle thing; The region of high direct voltage electrode 4 and ground electrode 5 longitudinal overlap is B district, produces strong electrostatic field in B district, carries out effective adsorption treatment in plasma slab is by charged macromolecular particle thing and script tail gas with regard to charged particulate matter.
Drag ground electrode 5, make ground electrode 5 be all maximum with the longitudinal overlap region of sinusoidal high-field electrode 3 and high direct voltage electrode 4, be such as 80mm*80mm, now purifier is with maximum purifying ability purifying automobile tail gas; By the translation of ground electrode 5 terminad, then lap is fewer and feweri in the vertical with sinusoidal high-field electrode 3 for ground electrode 5, plasma reaction district is more and more less, and the overlap region of ground electrode 5 and high direct voltage electrode 4 is all that 80mm*80mm is constant always, until ground electrode 5 and sinusoidal high-field electrode 3 zero lap region in the vertical, do not produce plasma treatment tail gas, and high-pressure electrostatic district is all the time with maximum purification capacity operation.Can regulate the output power of plasma discharge region thus according to the operation conditions of automobile, and high-pressure electrostatic district is not consumed power, so just reach the adjustment to purifier output power by the slidable adjustment of ground electrode 5.
The DC electrical source applied between described high direct voltage electrode 4 and ground electrode 5 is high-voltage pulsed source.
Claims (6)
1. the automobile exhaust purifier that is coupled with Electrostatic Absorption of a plasma, it is characterized in that, it comprises tail gas clean-up pipe (1), glass slideway (2), sinusoidal high-field electrode (3), high direct voltage electrode (4) and ground electrode (5)
Tail gas clean-up pipe (1) is nonmetal cuboid pipe, tail gas clean-up pipe (1) is divided into tail gas to introduce district (1-1), plasma treatment district (1-2), transition zone (1-3), electrostatic precipitation district (1-4) and tail gas discharge zone (1-5) by head end to end successively, and tail gas is introduced district (1-1) and arranged cooling device;
Glass slideway (2) is fixed on the outer surface of tail gas clean-up pipe (1) bottom surface, and ground electrode (5) is slidably arranged on glass slideway (2);
Sinusoidal high-field electrode (3) is embedded on the outer surface of tail gas clean-up pipe (1) end face, sinusoidal high-field electrode (3) position on tail gas clean-up pipe (1) is corresponding with plasma treatment district (1-2), and the length of sinusoidal high-field electrode (3) is identical with the length of plasma treatment district (1-2);
High direct voltage electrode (4) is embedded on the outer surface of tail gas clean-up pipe (1) end face, the position of high direct voltage electrode (4) on tail gas clean-up pipe (1) is corresponding with electrostatic precipitation district (1-4), and the length of high direct voltage electrode (4) is equal with the length of electrostatic precipitation district (1-4);
The length of ground electrode (5) is greater than or equal to the total length of plasma treatment district (1-2), transition zone (1-3) and electrostatic precipitation district (1-4), the length of glass slideway (2) is less than the length of tail gas clean-up pipe (1), the length of glass slideway (2) makes ground electrode (5) when sliding to the direction of tail gas discharge zone (1-5), and at least the head end of ground electrode (5) enters transition zone (1-3); The head end of ground electrode (5) is corresponding with the head end of tail gas clean-up pipe (1).
2. the automobile exhaust purifier that is coupled with Electrostatic Absorption of plasma according to claim 1, it is characterized in that, tail gas clean-up pipe (1) is quartz glass tube.
3. the automobile exhaust purifier that is coupled with Electrostatic Absorption of plasma according to claim 1 and 2, it is characterized in that, the supply voltage that described sinusoidal high-field electrode (3) connects is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz.
4. the automobile exhaust purifier that is coupled with Electrostatic Absorption of plasma according to claim 3, it is characterized in that, described sinusoidal high-field electrode (3), high direct voltage electrode (4) and ground electrode (5) are stainless steel electrode.
5. the automobile exhaust purifier that is coupled with Electrostatic Absorption of plasma according to claim 4, it is characterized in that, the length of described tail gas clean-up pipe (1) is 300mm, and substantially horizontal width is 100mm, and the distance between short transverse two apparent surface is 5mm; The length of glass slideway (2) is 280mm, and wide is 80mm; Glass slideway (2) is fixed on the outer surface of tail gas clean-up pipe (1) bottom surface between two parties;
The length of ground electrode (5) is 200mm, and wide is 80mm;
The length of tail gas introducing district (1-1), plasma treatment district (1-2), transition zone (1-3), electrostatic precipitation district (1-4) and tail gas discharge zone (1-5) is respectively 10mm, 80mm, 40mm, 80mm and 90mm.
6. a purifying vehicle exhaust method for the automobile exhaust purifier be coupled with Electrostatic Absorption based on plasma, it is characterized in that, it comprises the following steps:
Step one: apply sinusoidal high-voltage power between sinusoidal high-field electrode (3) and ground electrode (5), this sinusoidal high-voltage power voltage is 10kV ~ 30kV, and frequency is 10000Hz ~ 30000Hz; Between high direct voltage electrode (4) and ground electrode (5), apply DC electrical source, this direct current power source voltage is 5kV; By ground electrode (5) ground connection;
Step 2: use gas-guide pipeline vehicle exhaust to be introduced tail gas and introduce district (1-1), tail gas introducing district (1-1) steadily introduces plasma treatment district (1-2) after carrying out cooling process to vehicle exhaust;
Step 3: make ground electrode (5) corresponding to plasma treatment district (1-2), transition zone (1-3) and electrostatic precipitation district (1-4), make to enter plasma treatment district (1-2) until the vehicle exhaust of electrostatic precipitation district (1-4) carries out plasma reaction and high-pressure electrostatic precipitation;
Step 4: behind preheating setting time interval, to tail gas discharge zone (1-5) direction mobile grounding electrode (5), ground electrode (5) is made slowly to shift out plasma treatment district (1-2), corresponding with electrostatic precipitation district (1-4), realize the purification of vehicle exhaust thus, the vehicle exhaust after purification is discharged via tail gas discharge zone (1-5).
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| CN105781691A (en) * | 2016-02-15 | 2016-07-20 | 林雅宁 | Automobile tail gas power generation and purification device |
| CN110080857A (en) * | 2019-05-22 | 2019-08-02 | 朱红 | A kind of vehicle exhaust dust-extraction unit |
| WO2020083197A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust gas treatment system and method |
| WO2020083136A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine exhaust dust removing system and method |
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