CN101415292A - Honeycomb medium countercheck discharging low-temperature plasma generator - Google Patents
Honeycomb medium countercheck discharging low-temperature plasma generator Download PDFInfo
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- CN101415292A CN101415292A CNA200810235539XA CN200810235539A CN101415292A CN 101415292 A CN101415292 A CN 101415292A CN A200810235539X A CNA200810235539X A CN A200810235539XA CN 200810235539 A CN200810235539 A CN 200810235539A CN 101415292 A CN101415292 A CN 101415292A
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Abstract
The invention relates to a low-temperature plasma generator with a honeycomb-shaped medium resisting discharger. The low-temperature plasma generator comprises a casing, a combined high voltage electrode (1), a quartz medium (3), and low voltage electrodes (4) and a catalyzing chamber (7) which are arranged in honeycomb shape and also comprises an air inlet (5) at the outside of the casing and a vent (6) arranged at the bottom of the catalyzing chamber. The high voltage electrode (1) has a combined structure as follows: a quartz glass rod (21) is arranged at the outer layer of a conductive metal rod (20), and the conductive metal rod is connected with a metallic disk (23) by a bolt (22) at the lower side of the conductive metal rod; the conductive metal rod is arranged at the center of the metal disk. The low voltage electrode (4) consists of 32 tubular metal rods, the radial direction of which is parallel with the venting direction. The low-temperature plasma generator ensures that the low-temperature plasma generator runs safely and reliably in diesel engine venting bench experimental study work, improves the vibration resistance, increases the venting efficiency, reduces the back pressure of the diesel engine and ensures the accuracy of the test.
Description
Technical field
The present invention relates to engine emission reprocessing field, a kind of low-temperature plasma generator device that reduces harmful emission of diesel engine of more specifically saying so.
Background technology
At present, the low-temperature plasma generator structure that is used for diesel emission reprocessing field is made up of high-frequency ac power, equivalent capacity, high-field electrode, medium and low-field electrode.High-field electrode is connect high-frequency ac power, low-field electrode ground connection, dielectric material places between two electrodes, even, stable dielectric barrier discharge phenomenon can occur along dielectric surface in such two electrode gaps.Medium blocking-discharge method is handled harmful emission of diesel engine needs in higher degree of ionization, the gas phase zone requirements such as enough energy densities, dielectric material steady operation and the anti seismic efficiency of device own are good are arranged.This technology obtains broad research day by day in the exhaust-gas treatment field, Chinese patent CN200410016646.5 provides a kind of light fixture with the plasma air purification device, proposition purifies air by needle plate electrode structure partial discharge generation low temperature plasma, to combine in light fixture and the low temperature plasma air cleaning unit, simple in structure, easy for installation, and have illumination, multinomial function such as purify air, but exist discharge instability, shortcoming such as purification efficiency is low.Chinese patent CN1126939 provides a kind of low-temperature plasma generator, by rod-shaped conductor being inserted the through hole of the length direction of being located at bar-shaped ceramic dielectric, is that an integral body, sealing constitute electrode with glass, inorganic system or organic system adhesive with above-mentioned conductor and dielectric two ends joint, makes a plurality of electrodes become to engage the formation low-temperature plasma generator under the line contact condition across ceramic dielectric.This device can be in air and discharge in water, is used to purify air, there is effect preferably aspect such as deodorizing, thereby but has poor seismic behavior in actual bench test is used, frangiblely cause influencing shortcoming such as regular picture.Chinese patent CN101219338A provides a kind of low temperature plasma automobile exhaust gas purifying installation, be applicable to the low-temperature plasma generator that vehicle exhaust is handled, its structure is formed and is comprised high frequency electric source, power amplifier, power transformation device, controller and discharge cavity, this technology adopts particle, sulfur dioxide and the hydrocarbon in the Low Temperature Plasma Treating tail gas, can effectively reduce the noxious pollutant in the vehicle exhaust.It is the automobile of power that but this technology is applicable to gasoline engine, and still needs further improvement for diesel engine.
The free radical isoreactivity species that contain a large amount of high energy electrons, ion, excited state particle in the low-temperature plasma system and have strong oxidizing property.In the gas-phase chemical reaction process, these active groups can with pollutant generation chemical reactions such as CO, HC, NOx and PM, it is converted into the gas of harmless or low evil.At present the low-temperature plasma generator of design is applicable to the static simulation gas test more, and for the diesel engine bench test and be made into test and also have many deficiencies, awaits further research.
Summary of the invention
The problem to be solved in the present invention is to overcome low-temperature plasma generator generator poor seismic behavior in handling the toxic emission process, harmful effects such as exhaust back pressure height.A kind of cellular structure low-temperature plasma generator is provided, it is characterized in that housing section is arranged, comprise discharge of plasma in low temperature district, low-field electrode and catalytic chamber.This kind structure can guarantee the reliable and stable work of dielectric material, discharge stability and can effectively suppress creepage phenomenon, and have good seismic resistance.
The technical solution adopted in the present invention is: comprise a composite high pressure electrode in the discharge of plasma in low temperature district; This composite high pressure electrode comprises a bar-shaped metallic conductor, connects a circular conducting metal dish with bolt below and makes the composite high pressure electrode, and wherein metallic conductor is positioned at the central authorities of circular conducting metal dish.The outer cover of bar-shaped metallic conductor one quartz glass bar produces creepage phenomenon to guarantee safety in utilization when being used to prevent to discharge.This kind structure can produce a large amount of living radical groups in discharge process and the diesel engine harmful exhaust gas is carried out chemical reaction, not only can promote chemical reaction, can also make the chemical reaction that is difficult to produce under the usual conditions be able to rapid generation, strengthen the validity of removing harmful emission of diesel engine.The low pressure utmost point adopts the tubular metal structure, and this structure can play scavenging action can improve its working life again; 32 metal tubes are set to radially be evenly distributed on the cross section parallel with discharge directions, this structure has improved anti-seismic performance, increased exhaust efficiency, reduced the back pressure of diesel engine, improve simultaneously effectively diesel engine particles discharging clearance and reach more than 57%, and the fuel consumption that increases for diesel engine is in 5%.
Described honeycomb medium countercheck discharging low-temperature plasma generator is wherein inserted reduction catalyst in the catalytic chamber, can effectively will be converted into harmless or low harmful gas by the gas in the plasma gas phase zone.Catalytic chamber adopts bolt to be connected with housing, in actual application, can resist the influence of diesel exhaust gas strenuous vibration like this, plays the effect of stability against earthquake work, guarantees the reliability and the accuracy of work.
The invention has the beneficial effects as follows, can guarantee low-temperature plasma generator safe and reliable operation in diesel exhaust gas bench test research work, working life is longer, anti-seismic performance is good, can also guarantee the service behaviour that low-temperature plasma generator is stable by the periodic replacement dielectric material in addition.Should middle structure not be only applicable to the research of static simulation gas test, be applicable to real engine bench test research yet.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a power circuit diagram of the present invention.
Fig. 3 is composite high pressure electrode figure of the present invention
Among the figure, 1. composite high pressure electrode; 2.NTP discharge gas phase zone; 3. quartz medium; 4. low-field electrode; 5. air inlet; 6. exhaust outlet; 7. catalytic chamber; 8. AC power; 9. ammeter; 10. voltmeter; 11. high voltagehigh frequency NTP power supply; 12. capacitor voltage divider; 13. electric capacity a; 14. electric capacity b; 15.NTP generator; 16. electric capacity c; 17. joint a; 18. joint b; 19. oscilloscope; 20. metal bar; 21. quartz glass bar; 22. bolt; 23. rosette.
Embodiment
In Fig. 1, the cellular low-temperature plasma generator of the present invention connects the variable voltage variable frequency plasma electrical source by composite high pressure electrode 1 and the low pressure utmost point 4 ground connection produce discharge of plasma in low temperature.Shown in the figure, composite high pressure electrode 1 skin is a quartz glass bar 21, connect stainless steel metal disk 23 below, rosette 23 places in the groove shape quartz medium, quartz medium is outward a steel shape shell, like this can be for quartz medium provide good seismic resistance, quartz medium can be convenient for changing with the stable service behaviour of assurance low-temperature plasma generator, and makes the low-temperature plasma generator life-span be improved.The present invention adopts 32 tubular metal rods as low-field electrode, entering gas in the low-temperature plasma generator by air inlet 5 like this can effectively discharge in these pipes after through cold plasma discharge gas phase zone 2, this alveolate texture can effectively reduce exhaust resistance, improves its actual application ability in diesel emission reprocessing field.Exhaust outlet 6 tops process a cavity structure and use for lay catalyst in reducing the harmful emission of diesel engine application process, overall structure adopts stainless steel casing, guaranteed the low-temperature plasma generator steady operation, also strengthened the anti-seismic performance of low-temperature plasma generator and made be improved its useful life.
In Fig. 2, the present invention is to be provided by high voltagehigh frequency NTP power supply 11 for low-temperature plasma generator provides the device of power supply, and it is made up of AC power 8 and bleeder mechanism.The discharge voltage waveform is measured by the capacitor voltage divider 12 that electric capacity a13 and electric capacity b14 constitute.The electric charge of discharge space transmission obtains indirectly by the electric capacity c16 of one 1 μ F of series connection on discharge loop.By Tyke oscillographic joint b18 passage is connected with electric capacity c16 two ends, joint a17 passage is connected with big electric capacity two ends in the capacitor voltage divider 12, thus electric charge-voltage lissajous figures that acquisition can measuring N TP generator discharge power.The variable voltage variable frequency low-temperature plasma electrical source can be worked in 0～25kV, 8～20kHz scope.
Claims (5)
1. honeycomb medium countercheck discharging low-temperature plasma generator device, comprise housing, air inlet (5), exhaust outlet (6), composite high pressure electrode (1), quartz medium (3), low-field electrode (4) and catalytic chamber (7) is characterized in that, described high-field electrode (1) adopts composite construction: conducting metal rod (20) skin is quartz glass bar (21), adopt bolt (22) to connect a rosette (23) below, conducting metal rod (20) is positioned at rosette center (23).
2. a kind of honeycomb medium countercheck discharging low-temperature plasma generator device according to claim 1 is characterized in that described catalytic chamber (7) links to each other with housing parts by bolt.
3. a kind of honeycomb medium countercheck discharging low-temperature plasma generator device according to claim 1 is characterized in that described low-field electrode (4) is a honeycomb arrangement.
4. according to claim 1,2 or 3 described a kind of honeycomb medium countercheck discharging low-temperature plasma generator devices, it is characterized in that described low-field electrode (4) is made up of 32 tubular metal rods, radial direction is parallel with discharge directions.
5. a kind of honeycomb medium countercheck discharging low-temperature plasma generator device according to claim 4 is characterized in that, described 32 tubular metal rods along rosette cross section vertical direction all with distribute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA200810235539XA CN101415292A (en) | 2008-11-28 | 2008-11-28 | Honeycomb medium countercheck discharging low-temperature plasma generator |
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| CNA200810235539XA CN101415292A (en) | 2008-11-28 | 2008-11-28 | Honeycomb medium countercheck discharging low-temperature plasma generator |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343106A (en) * | 2011-07-22 | 2012-02-08 | 大连民族学院 | Atmospheric-pressure low-temperature plasma sterilizing device and sterilizing method |
| CN102371888A (en) * | 2011-06-24 | 2012-03-14 | 北京大学 | Vehicle-mounted plasma generator for purifying nitric oxide in vehicle tail gas |
| CN102695353A (en) * | 2012-05-31 | 2012-09-26 | 姚水良 | Basic unit and reactor utilizing high voltage to generate gas plasma discharge |
| CN103216336A (en) * | 2013-03-22 | 2013-07-24 | 哈尔滨工程大学 | Chemical heat regenerator |
| CN105333514A (en) * | 2014-08-12 | 2016-02-17 | 静域(上海)科技有限公司 | Dielectric barrier low-temperature plasma air purifier |
| CN106102293A (en) * | 2016-07-29 | 2016-11-09 | 中国北方发动机研究所(天津) | Parallel dielectric barrier discharge reactor |
| CN108421639A (en) * | 2018-05-10 | 2018-08-21 | 科创扬州环境工程科技有限公司 | A kind of ductwork type high voltage electric field |
| CN108541124A (en) * | 2018-04-27 | 2018-09-14 | 浙江大维高新技术股份有限公司 | A kind of honeycomb low temperature plasma generating means and its application method |
| CN109759149A (en) * | 2019-02-25 | 2019-05-17 | 江苏大学 | A kind of device that decaying catalyst quickly restores |
| CN109847673A (en) * | 2017-11-30 | 2019-06-07 | 中国石油化工股份有限公司 | A kind of plasma arc reactor and heavy oil lightening method |
| CN115779821A (en) * | 2022-12-14 | 2023-03-14 | 南京航空航天大学 | Electrochemical energy storage system and method based on plasma carbon dioxide gasification |
-
2008
- 2008-11-28 CN CNA200810235539XA patent/CN101415292A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371888A (en) * | 2011-06-24 | 2012-03-14 | 北京大学 | Vehicle-mounted plasma generator for purifying nitric oxide in vehicle tail gas |
| CN102343106B (en) * | 2011-07-22 | 2014-07-23 | 大连民族学院 | Atmospheric-pressure low-temperature plasma sterilizing device and sterilizing method |
| CN102343106A (en) * | 2011-07-22 | 2012-02-08 | 大连民族学院 | Atmospheric-pressure low-temperature plasma sterilizing device and sterilizing method |
| CN102695353A (en) * | 2012-05-31 | 2012-09-26 | 姚水良 | Basic unit and reactor utilizing high voltage to generate gas plasma discharge |
| CN102695353B (en) * | 2012-05-31 | 2015-08-12 | 浙江工商大学 | High voltage is utilized to produce gas plasma electric discharge elementary cell and reactor |
| CN103216336A (en) * | 2013-03-22 | 2013-07-24 | 哈尔滨工程大学 | Chemical heat regenerator |
| CN103216336B (en) * | 2013-03-22 | 2015-06-24 | 哈尔滨工程大学 | Chemical heat regenerator |
| CN105333514B (en) * | 2014-08-12 | 2018-11-23 | 静域(上海)科技有限公司 | Dielectric impedance low-temp. plasma air purifier |
| CN105333514A (en) * | 2014-08-12 | 2016-02-17 | 静域(上海)科技有限公司 | Dielectric barrier low-temperature plasma air purifier |
| CN106102293A (en) * | 2016-07-29 | 2016-11-09 | 中国北方发动机研究所(天津) | Parallel dielectric barrier discharge reactor |
| CN109847673A (en) * | 2017-11-30 | 2019-06-07 | 中国石油化工股份有限公司 | A kind of plasma arc reactor and heavy oil lightening method |
| CN108541124A (en) * | 2018-04-27 | 2018-09-14 | 浙江大维高新技术股份有限公司 | A kind of honeycomb low temperature plasma generating means and its application method |
| CN108421639A (en) * | 2018-05-10 | 2018-08-21 | 科创扬州环境工程科技有限公司 | A kind of ductwork type high voltage electric field |
| CN109759149A (en) * | 2019-02-25 | 2019-05-17 | 江苏大学 | A kind of device that decaying catalyst quickly restores |
| CN109759149B (en) * | 2019-02-25 | 2021-11-23 | 江苏大学 | Device for quickly reducing deactivated catalyst |
| CN115779821A (en) * | 2022-12-14 | 2023-03-14 | 南京航空航天大学 | Electrochemical energy storage system and method based on plasma carbon dioxide gasification |
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Open date: 20090422 |