CN203981454U - A kind of low-temperature plasma generator is worked in coordination with particles sampling device - Google Patents
A kind of low-temperature plasma generator is worked in coordination with particles sampling device Download PDFInfo
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- CN203981454U CN203981454U CN201420332708.2U CN201420332708U CN203981454U CN 203981454 U CN203981454 U CN 203981454U CN 201420332708 U CN201420332708 U CN 201420332708U CN 203981454 U CN203981454 U CN 203981454U
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Abstract
The utility model discloses the collaborative particles sampling device of a kind of low-temperature plasma generator, relate to automobile harmful gas emission purification treatment technology field.The utility model device comprises total inlet pipe (1), support A(5), plasma generator (6), draft tube (7), particles sampling device A(10), particles sampling device B(14), gas outlet (17), support B(18), total air escape pipe (20), base (21).The utility model, in conjunction with particles sampling device, can pass through Open valve A(8) obtain aerosol sample before Low Temperature Plasma Treating, by Open valve B(16) obtain aerosol sample after Low Temperature Plasma Treating.Can be used for the aerosol sample before and after low temperature plasma effect to carry out test analysis, to draw the action rule of low temperature plasma to particle.The utility model device is for disclosing the Study on mechanism of the Low Temperature Plasma Treating particle condition of providing convenience.
Description
Technical field
The utility model relates to harmful emission of diesel engine gas purification processing technology field.
Background technology
A few days ago, there is serious " haze " phenomenon in Chinese many areas, causes significant negative effect to environment, health and economic dispatch aspect.Research discovery, pellet is the main cause that causes " haze " to produce.Therefore the top priority that, solution " haze " is polluted is effectively to control pellet.Research shows, low temperature plasma can effectively reduce granular material discharged, and can not cause secondary pollution.Low-temperature plasma generator is mainly comprised of plasma electrical source, high-field electrode, dielectric layer and low-field electrode.Wherein, high-field electrode connects plasma electrical source, low-field electrode ground connection, and dielectric layer is placed between two electrodes, between two electrodes, can form uniform and stable electric discharge phenomena.
Lower temperature plasma technology obtains broad research day by day in exhaust-gas treatment field, Chinese patent CN201110057179.0 provides a kind of low-temperature plasma synergistic biphasic catalysis device and has processed the method for harmful gas emission, is applicable to harmful emission of diesel engine gas purification field.Its technology is by porting, and plasma producing apparatus, is oxidized phase catalytic unit, and reduction phase catalytic unit forms.Its technology is first oxidized phase catalysis by harmful gas emission by oxidation phase catalytic unit, by gas distribution, be again three strands or three strands and enter respectively above double-dielectric barrier discharge low-temperature plasma generator, gas is carried out to low-temperature plasma dielectric barrier discharge, finally by reduction phase catalytic unit, gas is reduced to phase catalysis.Chinese patent CN200410039002.8 provides a kind of low temperature plasma oil saving exhaust gas purifier for various internal combustion engines.Its device is comprised of high-frequency and high-voltage impulse power supply, plasma generator, terminal pad, gas piping and nozzle.Internal combustion engine is loaded onto this device, can promote quick and complete burning, eliminates black smoke, and rate of economizing gasoline reaches 8%-20%, reduces carbon monoxide, hydrocarbon and discharged nitrous oxides total amount more than 50%.Chinese patent CN 200810235539 provides a kind of honeycomb medium countercheck discharging low-temperature plasma generator device, this apparatus structure comprises housing, the low-field electrode of composite high pressure electrode, quartz medium, honeycomb arrangement and catalytic chamber, and the air intake opening of hull outside, be positioned at the exhausr port of catalytic chamber bottom.This technology can guarantee low-temperature plasma generator safe and reliable operation in diesel exhaust gas bench test research work, good seismic performance, but the hold-up time of gas composition in plasma gas-phase reaction district is shorter, and chemical reaction is not very abundant.Chinese patent CN200410065415.3 provides a kind of integrated low temperature plasma catalytic reactor for tail gas clean-up, this device comprises housing, honeycomb substrate catalyzer, low temperature plasma generating means, it is characterized in that honeycomb substrate catalyzer is arranged in the outlet side of housing.This device utilizes the synergistic purification function between plasma purification and catalyzer purification, utilizes the reactivity of the high energy active substance raising catalyzer of low temperature plasma generation, reduces the initiation temperature of catalyzer, improves tail gas clean-up rate.
Low temperature plasma generating means is applied to reduce has granular material dischargedly become the focus of studying in diesel engine aftertreatment field, and has obtained certain achievement.But the Study on mechanism that people reduce particle to lower temperature plasma technology is deep not enough, clear and definite not enough to reducing mechanism.More and the more complicated of diesel particulate component, the mechanism of action of research low temperature plasma to particle different component, reduces the granular material discharged mechanism of action by contributing to disclose lower temperature plasma technology.
Summary of the invention
The utility model provides a kind of low-temperature plasma generator to work in coordination with particles sampling device, be applicable to the test of full flow type diesel engine bench, can obtain the aerosol sample of low temperature plasma effect front and back, there is particles sampling device simple, operate lightly, for disclosing the mechanism of action of Low Temperature Plasma Treating particle, provide advantage.
The technical scheme that the utility model adopts is: before plasma generator, by-pass valve control A and dismountable particles sampling device A have been installed after total inlet pipe; By-pass valve control B and dismountable particles sampling device B have been installed before total air escape pipe.At region of discharge, adopt the structure of three or three above plasma generator parallel runnings, by the spaced certain distance of support, prevent interacting between device electrode, the material of support is insulation and resistant to elevated temperatures teflon.This kind of structure can a large amount of living radicals of generation group be carried out chemical reaction with diesel engine harmful exhaust gas in discharge process, not only can promote chemical reaction, can also make the chemical reaction that is difficult to generation under usual conditions be able to rapid generation, strengthen the validity that reduces harmful emission of diesel engine.The structure of three or three above plasma generator parallel runnings is applicable to full flow type bench test, can adjust according to the engine of different model, has more Practical significance.In addition, this structure has improved the hold-up time of exhaust components in plasma gas-phase reaction district, and capacity usage ratio is high, has strengthened the transformation efficiency of harmful gas component.Test shows that this device can effectively improve diesel engine particles discharge transformation efficiency and reach more than 60%, and the fuel consumption increasing corresponding to diesel engine is in 5%.
The collaborative particles sampling device of the utility model low-temperature plasma generator comprises total inlet pipe, support A, particles sampling device A, plasma generator, particles sampling device B, gas outlet, support B, total air escape pipe.Plasma generator is comprised of draft tube, high-field electrode, plug A, dielectric layer, low-field electrode, gas outlet, plug B.Dielectric layer is tubular quartz glass tube; Tubular quartz glass tube is located at support A and support B is upper, and the tube wall place at quartz glass tube two is respectively equipped with draft tube and gas outlet.The material of support A, plug A and base is teflon; High-field electrode is thin copper bar, is placed in quartz glass tube, and two of high-field electrode passes respectively from two plugs.Low-field electrode is constantan electrode, and low-field electrode is circular tube shaped, is wrapped in the tube wall outside of quartz glass tube, by lead-in wire ground connection.
Plasma generator is more than three or three, and can adjust according to the engine of different model, and more than three or three plasma generator total inlet pipe and total air escape pipe are evenly distributed on circumference.
The utility model is processed the method for harmful emission of diesel engine gas, first harmful gas emission is passed through to total air escape pipe, by gas distribution, be again three strands or three strands and enter respectively above double-dielectric barrier discharge low-temperature plasma generator, gas is carried out to low-temperature plasma dielectric barrier discharge, finally pass through total air escape pipe.Gas, after entering double-dielectric barrier discharge low-temperature plasma generator, to gas flow forcibly changing, extends gas in the hold-up time of double-dielectric barrier discharge low-temperature plasma generator.In addition, by particles sampling device A, particles sampling device B, can obtain at any time the aerosol sample of low temperature plasma effect front and back, be convenient to the analyzing and processing in the later stage of particle.
The collaborative particles sampling device of described a kind of Novel low temperature plasma body generator, wherein the subsidiary valve of particles sampling device is controlled, simple to operate, by frosted, seals, and installs quick detachable, convenient and reliable.This device adopts monolithic construction, the homogeneity that has guaranteed to enter each plasma generator gas, and functional reliability is good.Total inlet pipe, total air escape pipe are connected with silicone tube with exhaust apparatus, in actual application, can resist the impact of diesel exhaust gas strenuous vibration like this, play the effect of stability against earthquake work, guarantee reliability and the accuracy of work.
The beneficial effects of the utility model are, device is by three or three above compound integral molding structures that form of plasma generator, this structure can be controlled according to engine different displacements, is suitable for the engine noxious gas emission that full flow type is processed Multiple Type.Particle sampler, can obtain the aerosol sample before and after low temperature plasma effect at any time, is convenient to the analyzing and processing in the later stage of particle.The present invention is applicable to full flow type bench test, is applicable to the diesel engine of different model, can effectively extend the hold-up time of gas composition in plasma gas-phase reaction district, and assurance plasma active matrix and harmful emission of diesel engine component are fully carried out chemical reaction; Simultaneously, in conjunction with particles sampling device, can obtain at any time low temperature plasma effect front and back aerosol sample, pattern, the variation that becomes to grade with particle before and after analysis low temperature plasma effect particle provide advantage, for disclosing the mechanism of action of low temperature plasma reduction particle, provide advantage.Compact conformation of the present invention, applicability is good.1) angle between gas outlet and total air escape pipe is 30 °≤θ≤45 °, angle between gas outlet and total air escape pipe is 30 °≤θ≤45 °, angle is too low, there will be electric discharge interference phenomenon between single low-temperature plasma generator, affects its discharge stability; Angle is excessive, can cause the suffered resistance of gas larger, and the structure of device is strengthened, and economy declines.2) particle sampling system is easy and simple to handle, and convenient disassembly is convenient to the fundamental research of real-time analysis lower temperature plasma technology on particle impact.3) porting is positioned at homonymy, is integral structure, and this structure can ensure discharge stability and the homogeneity of individual plasma generator, to guarantee consistance and the accuracy of experimental analysis.4) link position of total inlet pipe and draft tube is to the distance L between total inlet pipe and particles sampling device A link position, with the scope of the ratio of the inner diameter d of total inlet pipe be 1≤L/d≤2, ratio is excessive, although easily form turbulence vortex group, collect more particle, but the internal resistance of air-flow in porting is larger, limited the treatment capacity of system.Ratio is too small, is not easy to form eddy current whirlpool group, and particle is blown out by air-flow, is not easy to collect particle.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the single plasma generator schematic diagram of the utility model.
Fig. 3 is the discharge of plasma in low temperature part-structure schematic diagram after base, support that removes of the present utility model.
Fig. 4 is discharge of plasma in low temperature part-structure schematic diagram of the present utility model.
Fig. 5 is particles sampling device of the present utility model.
Fig. 6 is particles sampling device key dimension schematic diagram of the present utility model.
Fig. 7 is that particles sampling device key dimension L/d of the present utility model equals at 1 o'clock, the Flow Field Distribution situation of gas in sampler.
Fig. 8 is that particles sampling device key dimension L/d of the present utility model equals at 2 o'clock, the Flow Field Distribution situation of gas in sampler.
In figure, 1 total inlet pipe, the 2 high voltage utmost points, 3 high voltage utmost point pitmans, 4 plug A, 5 support A, 6 plasma generators, 7 draft tube, 8 valve A, 9 frosted packoff A, 10 particles sampling device A, the 11 low-voltage utmost points, 12 low-voltage utmost point pitmans, 13 lead-in wires, 14 particles sampling device B, 15 frosted packoff B, 16 valve B, 17 gas outlets, 18 support B, 19 plugs, 20 total air escape pipes, 21 base plates.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further illustrated.
The utility model is for processing the collaborative particles sampling device of Novel low temperature plasma body generator of harmful emission of diesel engine.During test, first the high-field electrode 2 of three or three above plasma generators and low-field electrode 11, the mode by pitman soldering or winding is together in parallel respectively, then high-field electrode connects variable-frequency variable-voltage plasma electrical source, and low-field electrode ground connection, to produce plasma.Total air escape pipe 1, total air escape pipe 20 are connected with silicone tube with exhaust apparatus.Diesel exhaust gas first passes into total air escape pipe 1, changeover valve A8, valve A8 opens, particle sampler A10 starts to obtain aerosol sample, wait for that certain hour particle sampler A10 obtains after required aerosol sample, takes off particle sampler A10 and can obtain the aerosol sample before low temperature plasma effect; Gas distribution is three strands or three strands and enters respectively above double-dielectric barrier discharge low-temperature plasma generator, gas is carried out to low-temperature plasma dielectric barrier discharge, then first harmful gas emission enters total air escape pipe 20, by changeover valve B16, valve B16 opens, particle sampler B14 starts to obtain aerosol sample, wait for that certain hour particle sampler B14 obtains after required aerosol sample, takes off particle sampler B14 and can obtain the aerosol sample after low temperature plasma effect.
L/d equals at 1 o'clock as can be seen from Figure 6, and the Flow Field Distribution integral body of gas in sampler is more even, only has less turbulence vortex groups with draft tube 7 junctions.When L/d equals 2, there is large more turbulence vortex group in the flow field of gas in sampler.This shows, L/d ratio is too small, is not easy to form eddy current whirlpool group, and particle is blown out by air-flow, is not easy to collect particle.Ratio is excessive, although easily form turbulence vortex group, collects more particle, and the internal resistance of air-flow in porting is larger, has limited the treatment capacity of system.
Described low-temperature plasma generator 6, draft tube 7, gas outlet 17, total inlet pipe 1 and total air escape pipe 20 are integral type molding structure; Between particles sampling device A10 and total inlet pipe 1, particles sampling device B14 and total air escape pipe 20 be detachable apparatus.
Angle between draft tube 7 and total inlet pipe 1 is 30 °≤θ≤45 °, and the angle between gas outlet 17 and total air escape pipe 20 is 30 °≤θ≤45 °; It is more than three or three that plasma generators are evenly distributed on circumference around total inlet pipe 1 and total air escape pipe 20.
The link position of total inlet pipe 1 and draft tube 7 is to the distance L between total inlet pipe 1 and particles sampling device A10 link position, with the scope of the ratio of the inner diameter d of total inlet pipe 1 be 1≤L/d≤2; The link position of total air escape pipe 20 and gas outlet 17 is to the distance L between total air escape pipe 20 and particles sampling device B14 link position, with the scope of the ratio of the inner diameter d of total air escape pipe 20 be 1≤L/d≤2.
Claims (7)
1. a low-temperature plasma generator is worked in coordination with particles sampling device, it is characterized in that, apparatus of the present invention comprise total inlet pipe (1), support A(5), three or three above low-temperature plasma generators (6), draft tube (7), particles sampling device A(10), particles sampling device B(14), gas outlet (17), support B(18), total air escape pipe (20), base (21); Described total inlet pipe (1) and total air escape pipe (20) are circular tube shaped, and axis is located along the same line; Described total inlet pipe (1) one end is air intake opening, and the other end is provided with particles sampling device A(10); Described total air escape pipe (20) one end is exhausr port, and the other end is provided with low-temperature plasma generator (6), draft tube (7), particles sampling device A(10); It is more than three or three that plasma generators are evenly distributed on circumference around total inlet pipe (1) and total air escape pipe (20); Described plasma generator is by high-field electrode (2), plug A(4), dielectric layer (6), low-field electrode (11) and plug B(19) form, described dielectric layer (6) is tubular quartz glass tube, the tube wall place at quartz glass tube two is respectively equipped with draft tube (7) and gas outlet (17), described draft tube (7) is connected with the sidewall of total inlet pipe (1), and described gas outlet (17) is connected with the sidewall of total air escape pipe (20); Described high-field electrode (2) is thin copper bar, is placed in quartz glass tube, and two of described high-field electrode (2) passes respectively from two plugs; Described low-field electrode (11) is constantan electrode, and described low-field electrode (11) is circular tube shaped, is wrapped in the tube wall outside of quartz glass tube; Described tubular quartz glass tube is located at support A(5) and support B(18) on; Support A(5) and support B(18) be fixed on base (21); Described support A(5), support B(18), base, plug A(4) and plug B(19) material be teflon; The high voltage utmost point (2) of described three or three above low-temperature plasma generators (6) connects by pitman (3) soldering or canoe, low-field electrode (11) adopts soldering or canoe to connect by pitman (12), by lead-in wire (13) ground connection.
2. low-temperature plasma generator according to claim 1 is worked in coordination with particles sampling device, it is characterized in that, described low-temperature plasma generator (6), draft tube (7), gas outlet (17), total inlet pipe (1) and total air escape pipe (20) are integral type molding structure; Particles sampling device A(10) and between total inlet pipe (1), particles sampling device B(14) with total air escape pipe (20) be detachable apparatus.
3. low-temperature plasma generator according to claim 1 and 2 is worked in coordination with particles sampling device, it is characterized in that, angle between described draft tube (7) and total inlet pipe (1) is 30 °≤θ≤45 °, and the angle between gas outlet (17) and total air escape pipe (20) is 30 °≤θ≤45 °.
4. low-temperature plasma generator according to claim 3 is worked in coordination with particles sampling device, it is characterized in that, at described total inlet pipe (1) and particles sampling device A(10) one end of being connected is provided with valve A(8), Open valve A(8), gas inflow particle sampler A(10), particle sampler A(10) obtain aerosol sample; At described total air escape pipe (20) and particles sampling device B(14) one end of being connected is provided with valve B(16), Open valve B(16), gas flows into particles sampling device B(14), particles sampling device B(14) obtain aerosol sample.
5. low-temperature plasma generator according to claim 3 is worked in coordination with particles sampling device, it is characterized in that, the link position of described total inlet pipe (1) and draft tube (7) is to total inlet pipe (1) and particles sampling device A(10) distance L between link position, with the scope of the ratio of the inner diameter d of total inlet pipe (1) be 1≤L/d≤2.
6. low-temperature plasma generator according to claim 3 is worked in coordination with particles sampling device, it is characterized in that, the link position of described total air escape pipe (20) and gas outlet (17) is to total air escape pipe (20) and particles sampling device B(14) distance L between link position, with the scope of the ratio of the inner diameter d of total air escape pipe (20) be 1≤L/d≤2.
7. low-temperature plasma generator according to claim 3 is worked in coordination with particles sampling device, it is characterized in that described particles sampling device A(10) with particles sampling device B(14) by frosted packoff (9), be connected with frosted packoff (15) with total air escape pipe (20) with total inlet pipe (1) respectively; Described frosted packoff (9) and frosted packoff (15) are connected and sealed by frosted auxiliary seal pad, or are connected and sealed by hinging manner.
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| CN201420332708.2U CN203981454U (en) | 2014-06-20 | 2014-06-20 | A kind of low-temperature plasma generator is worked in coordination with particles sampling device |
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| CN201420332708.2U CN203981454U (en) | 2014-06-20 | 2014-06-20 | A kind of low-temperature plasma generator is worked in coordination with particles sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062154A (en) * | 2014-06-20 | 2014-09-24 | 江苏大学 | Sampling device of collaborative particulates of low-temperature plasma generator and sampling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062154A (en) * | 2014-06-20 | 2014-09-24 | 江苏大学 | Sampling device of collaborative particulates of low-temperature plasma generator and sampling method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 |