CN1027828C - Ozone-catalyst method automobile tail gas purifier and technology - Google Patents
Ozone-catalyst method automobile tail gas purifier and technology Download PDFInfo
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- CN1027828C CN1027828C CN92112614A CN92112614A CN1027828C CN 1027828 C CN1027828 C CN 1027828C CN 92112614 A CN92112614 A CN 92112614A CN 92112614 A CN92112614 A CN 92112614A CN 1027828 C CN1027828 C CN 1027828C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention relates to an ozone-catalyst method automotive tail gas purifier and purifying processes thereof, wherein a venturi pipe in the purifier is communicated with an ozone output pipe of an ozonizer. Two to ten ozone generating pipes are arranged in the ozonizer; the ozonizer and a catalyst box are assembled into one whole body by making use of a fixing plate and are fixed in an automotive exhaust pipe position. The purifying process utilizes a mode of two tail gas purifying steps combining ozone oxidation with catalyst oxidation; firstly, noxious component such as: CO, HCx, Pb (C2H5), etc., of the automotive tail gas are ozonized; secondly, low-concentration and low noxious substances obtained by ozone oxidation are catalyzed and oxygenized through a second step, which causes that the substances are completely converted into carbon dioxide, water and nitrogen dioxide or less organic substance with molecules. The present invention can make the automotive tail gas achieve a discharging standard without polluting environment. The structure of the purifier and the purifying processes are both simple.
Description
The present invention is that a kind of two step method processing technological flow of utilizing ozone oxidation and catalyst oxidation to combine is carried out purified treatment to vehicle exhaust.It relates to the purification plant of the purified treatment of vehicle exhaust.Be specially adapted to the purified treatment of home-produced fuel machine vehicle exhaust.
At present, the various model automobiles that China produces all are that vehicle exhaust is directly entered in the atmosphere without purified treatment, have caused the severe contamination to atmosphere environment.Particularly in big and medium-sized cities, traffic congestion, vehicle is various; Because auto idle speed travels, gasoline combustion is incomplete, and various oxious components increase severely in the vehicle exhaust, and every index severe overweight causes the pollution of atmosphere even more serious.As everyone knows, the main oxious component in the vehicle exhaust has: 1. carbon monoxide [CO], 2. 3. hydrocarbon [HC], 4. tetraethyllead [pb(C of nitrogen oxide [NOx]
2H
5)
4These pollutants have bigger toxicity, and people's respiratory system, blood, liver, heart, nervous system all had bigger harm, and unprocessed just being discharged in the atmosphere caused the severe contamination to atmosphere.In congested in traffic and the more area of vehicle, because auto idle speed travels, gasoline combustion is incomplete, various oxious components increase, pollute even more serious in the vehicle exhaust.Have a spot of automobile to adopt the catalyst method cleaning of off-gas now, the major defect that they exist is that the lead in the vehicle exhaust causes catalyst poisoning, and working life is short, needs often to change; In addition, purifying effect is also not so good.
Purpose of the present invention is exactly in order to solve deficiency of the prior art, and has proposed a kind of ozone-catalyst method automobile tail gas purifier.The present invention is the method that combines by ozone oxidation and catalyst oxidation, solves the pollution problem exhaust purifier of the present invention that vehicle exhaust brings, and solves present vehicle exhaust and directly is discharged into the environmental pollution problem that brings in the atmosphere without purifying.
The object of the present invention is achieved like this:
The ozone-catalyst method automobile tail gas purifier of forming by Venturi tube, catalyst tank etc., wherein Venturi tube is connected with the ozone output tube of ozonizer, ozonizer is installed several ozone generating pipes, utilizes fixed plate that ozonizer and catalyst tank are combined into one and are fixed on the automobile exhaust pipe place.The ozone generating pipe number of installing in the ozonizer is 2～10.
The present invention compared with prior art has following advantage: utilize purifier of the present invention to the toxic substance in the vehicle exhaust such as CO, HC, NO
xPb(C
2H
5)
4Carry out ozone oxidation and catalytic oxidation, make its complete oxidation become carbon dioxide, water, nitrogen dioxide or a small amount of low molecule organic matter.Purifier of the present invention is rational in infrastructure, technology is simple.Vehicle exhaust after this device purifies can reach comparatively ideal emission standard.
The present invention has 4 width of cloth accompanying drawings, wherein:
Fig. 1, for the schematic representation of automobile exhaust purifier of the present invention;
Fig. 2, Fig. 3, be the schematic representation of heteroid catalyst tank;
Fig. 4, be purifying vehicle exhaust process flow diagram of the present invention.
Below in conjunction with accompanying drawing embodiments of the invention are described further:
The ozone-catalyst method automobile tail gas purifier of being made up of Venturi tube, catalyst tank etc.: shell adopts firm in and difficult the materials processing of ozone oxidation, 1～20 of interior installation ozone generating pipe, preferably 2～10.Venturi tube 5 is connected with the ozone output tube 4 of ozonizer 2, the ozone generating pipe that ozone generating pipe can adopt ground such as Beijing, Shanghai to produce, and this ozonizer is easy to manufacture for a person skilled in the art.
The effect of fixed support/plate 1 is that ozonizer 2, catalyst tank 7, Venturi tube 5 are combined, and is fixed on the proper site of automobile chassis near outlet pipe or baffler, and the fixed position of recommendation is the automobile chassis crossbeam; Ozonizer can also be installed in other suitable positions for dissimilar automobiles.Fixed support/plate can be manufactured with any fastening material, and what recommend employing is carbon steel board.Thickness is 2～8mm, preferably 3～5mm.The size of fixed support/plate is different with vehicle and different according to the installation position, but must can bear the weight of ozonizer and catalyst tank etc. and the vibration in the automobilism.This is apparent to those skilled in the art.
Exhaust purifier parts ozonizer 2 of the present invention is the ozone that is used for producing cleaning of off-gas.This generator is a tubular structure, and ozone generating pipe is the special glass pipe, diameter of phi 5～Φ 50mm, length 50～500mm.Pipe is outer to be the wire netting of an anti-ozone corrosion, uses as the glow discharge screen.Fluorescent tube adopts 12～24V DC electrical source, make with material firm, corrosion resistant with the power supply of automobile storage battery or DC generator, generator shell, it is shaped as different shapes such as cylindrical body, square body, cuboid, ellipsoid, cone (metal, nonmetal all can), and swept volume is 10 centimetres
3-500 centimetres
3The consumption of ozone generating pipe 3 is determined according to the discharge amount of dissimilar tail gas.General with 1～20, be installed on the generator inner fixed support with 2～10 ozone generating pipes 3 usually.Air stream is evenly passed through from surface of the light tube.Power socket is fixed on the generator shell body.Adopt sealing, insulation, instrumentation style socket.Also available extraction lead and engine start switch join.Connecting ozonizer one end without socket is suction port.1～5 layer of wire netting and 1～3 layer of water repellent filter cloth that the aperture is suitable is installed, make air smoothly by and prevent that the immersion fluorescent tube front portion of rainwater and surface gathered water is equipped with one semi-circular grade of water plate, with cold doubtful ponding in the generator from the bottom cock of water drain discharge, the other end of ozonizer is movable joint, is used for connecting exhaust manifolds.Movable joint is the metal or the nonmetallic material processing of scyewed joint or flange connecting mode, the anti-smelly corrosion of material selection.
Catalyst tank 7 adopts the metallic material of corrosion-and high-temp-resistant or nonmetallic material to make.Profile can be processed into cuboid, different shapes such as cylindrical body, square body, cone, water chestnut cylinder.Volume is 0.5 liter (500 centimetres
3) to 50 liters (50000 centimetres
3).Be provided with the dividing plate of some in the casing, catalyzer is fixed between the dividing plate, is covered with aperture on the dividing plate, makes air-flow pass through catalyst layer smoothly.Catalyzer also can be put into star, honeycomb metal net cage, reinstalls in the catalyst tank frame, and the pump of design then is to allow vehicle exhaust contact catalyst to greatest extent, and can pass through catalyst layer rapidly.Consider the periodic replacement of catalyzer, an end of catalyst tank adopts screw thread or flange to connect so that keep in repair and catalyst changeout more.This catalyst tank not only can make vehicle exhaust be purified, the effect of can also eliminating the noise simultaneously, the silencing apparatus that can replace automobile to use.This catalyst tank can be installed on the automobile engine exhaust pipe road and also can be installed in after the automotive muffler, decides on car category and particular location.
Venturi tube 5 effects are that ozone is fully mixed with vehicle exhaust.Utilize air to flow fast and produce negative pressure, ozone gas is entered rapidly from the ozone output tube in the vehicle exhaust, fully mix, carry out ozonization, then, enter catalyst tank with the tail gas of flowing through.Venturi tube 5 can adopt high temperature resistant, corrosion resistant metallic material or nonmetallic material to make, Venturi tube can be different shapes such as cylindrical body, spheroid, cuboid, square body, cone, and Venturi tube throat can be parabola, sphere, the conical surface, different shapes such as helicoid.Design principle produces big negative pressure at ozone and tail gas connecting part, fully mixes the carrying out of favourable ozonization rapidly in order to ozone with tail gas.
Purifier and automobile engine exhaust pipe connecting tube 6 can adopt screw thread, flange or adapter, and modes such as long hoop connect.Can adopt resistant to elevated temperatures metal or nonmetallic material to make.In order to prevent thermal expansion and vibration noise, also can adopt the serpentine spring flexible pipe to connect, adopt long hoop asbestos, rubber sleeve (pad) can be installed in the middle of connecting, can adopt different shapes such as cylindrical body, cuboid, square body, spheroid with heat expansion-proof and vibration, adapter, long shape of binding round, size should match with Venturi tube and automobile engine exhaust pipe also can adopt large and small Placement, or adopts reducer pipe to connect.Diverse location according to vehicle and purifier installation is determined.
Connecting tube 6 is the connecting tube of ozonizer and Venturi tube.Can adopt the metal and the nonmetallic material of anti-ozone corrosion to make.The pipe diameter is 3mm～30mm, and preferably 5mm～10mm length is inserted the beeline of mouth to Venturi tube for the ozonizer exhaust port.But should prevent that also pipeline from fractureing, kinking influences gas communication.
The automobile exhaust purifier that the present invention adopts, the purification method that combines for ozone oxidation and catalyst.Characteristics such as it has drawn ozone oxidation and catalysed oxidation processes advantage separately, has overcome two kinds of methods deficiency separately again simultaneously, and it is effective that this method has purifying vehicle exhaust, and the long service life of catalyzer is economic and practical, and is easy to use.
1, ozone oxidation method test:
Adopt independent ozone oxidation method that vehicle exhaust is carried out purified treatment.Because the half-value period of ozone is very short, the CO in ozone and the vehicle exhaust, NO, HC compound short term contact are though can carry out ozonization.But because time of contact is short, ozone output is low, and purifying effect is affected, and generates many middle ozonation products simultaneously; As toxic substances such as methyl alcohol, formaldehyde, formic acid.In order to improve treatment effect, require to have the ozonizer of high yield, used power supply automobile can't be supplied with, and its use is restricted.(table 1 is seen the literary composition back)
Methyl alcohol, formaldehyde, formic acid content increase 500 times than original.
2, catalyst oxidation method test
Can carry out effective purified treatment to vehicle exhaust though adopt the method for catalyst oxidation, but owing in vehicle exhaust, exist lead, sulphur, charcoal cigarette ... Deng material, easily make catalyst poisoning, active decline, the purifying effect of catalyzer is reduced greatly, so that scrap and to use, need more connect new catalyzer, have only the time of some months the working life of catalyzer.
Catalyzer activates absorption to the oxygen in the vehicle exhaust, and (forming unsettled bonding state) contacts hydrocarbon again, could generate carbon dioxide.Active oxygen on the catalyst surface is the key of purifying automobile tail gas.Because the oxygen content in the vehicle exhaust is lower, the chance that catalyst surface obtains active oxygen reduces, and activity of such catalysts is descended, and the purifying effect of vehicle exhaust is significantly descended.Test situation is face table 2 as follows.
Table 2
The preface catalyzer is measured bar carbon monoxide hydro carbons nitrogen oxide
Number consumption spare (moon) purification ratio % purification ratio % purification ratio %
1 2kg one month 87 95 97
2 2kg two months 81 87 89
3 2kg three months 78 81 79
4 2kg six months 52 47 38
3, ozone-catalyst method
The method that adopts ozone oxidation and catalyst oxidation to combine at first utilizes the oxidation of ozone to make CO, the NO of vehicle exhaust middle and high concentration
x, the HC compound is transformed into carbon monoxide, nitrogen oxide and the hydrocarbon of low density, again through the catalyst oxidation processes, makes that vehicle exhaust after the purification is disposable to reach the emission request that country allows.Extended to two year or more from some months the working life of catalyzer.Because the adding of ozone, oxygen content improves greatly in the tail gas, has improved the adsorptive power of catalyzer to oxygen, and activity of such catalysts is constantly strengthened.Add Mn in the catalyzer
2O
3-Fe
2O
3Can make catalyzer not be subjected to lead poisoning, also improve the resistance to shock of catalyzer simultaneously.Life of catalyst is prolonged greatly.Test situation is face table 3 as follows.(table 3 is seen the literary composition back)
Therefore, the method that adopts ozonization and catalyst oxidation to combine is to handle reliable, the most economic and practical method of vehicle exhaust at present.It is safe and reliable that it has purifying effect, the purification efficiency height, and the long service life of catalyzer is the economical and practical method of a kind of long-term use.
The following examples are to further specify of the present invention
Easterly dongfeng vehicle type automobile exhaust purifier, ozonizer adopt the thick stainless steel processing and fabricating of 2mm, and external dimension Φ 150 * 280mm, 4 of interior installation ozone generating pipes, ozone output are 250 little Grams Per Minutes, root * 4 piece.
Catalyst tank adopts the thick corrosion resistant plate processing of 3mm, external dimension 260 * 200 * 100mm, in have two-layer tilted-putted dividing plate, dividing plate to be covered with Φ 2mm hole, interior dress multicomponent catalyst 2kg, the casing rear portion is that flange connects, as shown in Figure 3.
Venturi tube adopts stainless steel bar processing, external dimension Φ 60 * 80mm, and throat is provided with Φ 5mm Stainless Steel Tube, adopts sealing bolt, nut to connect.Connecting tube Φ 5mm Stainless Steel Tube.
Take over and long hoop employing A
3Steel processing, external dimension Φ 60 * 140mm, an end is connected with Venturi tube, and an end is connected with automobile exhaust pipe, and the joint is the asbestos rubber collar.Fixing with long hoop, clamp.
This automobile exhaust purifier is installed on the east wind long vehicle exhaust pipe.Through more than 30,000 kilometer of actual motion, repeated detection, purified gas CO, NO
x, HC, Pb(C
2H
5) relevant automobile
4Index reaches the tail alignment request.As follows the surface 4.(table 4 is seen the literary composition back)
Toyota's minibus automobile exhaust purifier, ozonizer are the processing of the thick Stainless Steel Tube of 1.5mm, and boundary dimension Φ 120mm * 200mm, 2 of interior installation ozone generating pipes, ozone output are 250 little Grams Per Minutes, root * 2 piece.
Catalyst tank adopts the thick Stainless Steel Tube processing of 1.5mm, external dimension Φ 120 * 300mm, there are two plate washers the centre, is covered with Φ 10mm pore catalyst on the plate washer and packs in Φ 100 * 100mm Stainless Steel Wire net cage, be installed in two, catalyst tank two ends top cover for being threaded, as shown in Figure 2.
Venturi tube adopts stainless steel bar processing, the external-open size, and Φ 50 * 60mm, the centre is a Φ 5mm Stainless Steel Tube intubate, employing is threaded, connecting tube is Φ 5mm Stainless Steel Tube.
Take over and long hoop employing A
3Steel processing, an end links to each other with Venturi tube and welds together, and the other end adopts flange connection, links to each other with the automobile engine tail gas discharge pipe.
This automobile exhaust purifier is installed on the Japanese Toyota minibus, through practical application more than a year, and 40,000 kilometers of vehicle travels, each component is functional, through repeated detection, purifies the requirement that back tail gas reaches relevant automobile emissions standards, as follows face table 5.(table 5 is seen the literary composition back)
The clean device of Beijing jeep vehicle exhaust, ozonizer adopt the processing of polyvinyl chloride-type plastic tube, and external dimension Φ 120 * 200mm thickness of pipe 5.0mm, three of interior dress ozone generating pipes, ozone output are 250 micrograms/root division * 3 piece.
Catalyst tank adopts Stainless Steel Tube processing, boundary dimension: Φ 150 * 300mm, thickness of pipe wall 1.5mm.Catalyzer is contained in Φ 140 * 50mm Stainless Steel Wire net cage, reprocess 3 Φ 130 * 50mm stainless steel rings, put into catalyst tank at interval, make catalyzer be fixed in the casing preferably with the catalyzer net cage, while can make the tail gas after the purification pass through catalyst layer smoothly again, as shown in Figure 1.
Venturi tube adopts stainless steel bar processing, boundary dimension Φ 60 * 80mm, and throat is equipped with Φ 5mm Stainless Steel Tube and inserts.Employing is threaded, connecting tube Φ 5mm Stainless Steel Tube.
Take over and length, hoop adopts A
3Carbon steel processing, an end links to each other with Venturi tube, and an end links to each other with automobile tail gas pipe, adopts flange to connect.
This automobile exhaust purifier is installed on the jeep car of Beijing, through practical application more than a year, and more than 20,000 kilometer of stroke, each component of purifier are excellent, repeated detection, purifying effect is face table 6 as follows well.(table 6 is seen the literary composition back)
The technological method of utilizing the two step purifying automobile tail gas that ozone oxidation and catalyst oxidation combine of the present invention.Its concrete grammar is the first step, to the toxic component in the vehicle exhaust, as CO, HC, No
x, pb(C
2H
5)
4Deng carrying out ozone Oxidation Treatment, make it change into the material of nontoxic or low toxicity.These through ozone oxidation become for low concentration and hypotoxic material again through the second step catalytic oxidation, make it change into carbon dioxide [CO fully
2], water [H
2O], nitrogen dioxide [NO
2] or a small amount of low molecule organic matter.Vehicle exhaust after this method purifies can reach comparatively ideal emission standard.
The ozone that the present invention uses is three atom allotropic modifications of oxygen, and it obtains by ozonizer.The oxidizing potential height of ozone, oxidability is strong, and ozone has the ability of the most organic compounds of oxidation, and it is ten minutes hydro carbons, sulphide, a helium oxide rapidly with the effect of nucleophilic compound, carbon monoxide etc. all can be rapidly by ozone oxidation, and its reaction equation is as follows:
In the formula: HC-is a hydrocarbon
R
2S-is an organic sulfur compound
Pb(C
2H5)
4-be antiknock agent tetraethyllead in the gasoline
Multicomponent catalyst in the automobile exhaust gas purifying installation of the present invention, its main component has: platinum (Pt), palladium (Pd), rhodium (Pn) and rare-earth oxide, it does carrier with activated alumina or molecular sieve etc.The catalyzer that the present invention uses can be simultaneously carries out catalytic oxidation to multiple harmful, toxic component in the vehicle exhaust, makes it be oxidized to H
2O, CO
2, NO
2, P
dLow toxicity or nontoxic products such as O.The present invention further uses catalytic oxidation after ozone oxidation be in order to make ozone not have the oxidation further oxidation of product completely complete.Catalyzer used in the present invention can be bibliographical information or prior art in the various catalyzer that are used for purifying vehicle exhaust that use, but preferably use by method preparation of the present invention.The method that the present invention prepares catalyzer is: with 0.01～0.5%(weight) platinum and the palladium chlorination or, nitrate powder, preferably 0.05～0.15%; Copper chromite [Cu
2CrO
2], weight is 3～10%, and preferably 5～8%; Vanadium pentoxide (v
2O
5), weight is 5～15%, and best 7～10%; Ferric oxide (Fe
2O
3), weight is preferably in 5～9% 3～12%; Cobalt oxide (Co
3O
4), weight is 1～13%, and best 4～9%; Manganese sesquioxide managnic oxide (Mn
2O
3), weight is 1～10%, and preferably 3～7%, these compounds are added in the distilled water, stir, again with catalyst carrier activated alumina or molecular sieve, preferably the molecular sieve of 4A, 5A adds in the above-mentioned aqueous solution, after stirring, standing adsorption 1～5 hour preferably after 1.5～2.5 hours, is outwelled the upper strata clear water, place High Temperature Furnaces under 300～800 ℃ of conditions, to activate 2～8 hours, promptly can be made into the catalyzer that the present invention is used for purifying automobile tail gas.
The process conditions of purifying automobile tail gas of the present invention are:
1, definite (ozone output) of ozone concentration
The concentration that feeds ozone is high more, and is good more to the purifying effect of vehicle exhaust.But excessive ozone adds, and not only causes the waste of ozone and the increase of power consumption, and excessive ozone enters in the atmosphere, also can cause the pollution to environment.According to the concentration of harmful components in China's emission of automobile wastes amount and the tail gas, the charging quantity of ozone is; Ozone: tail gas=1: 0.5～1: 5, preferably 1: 1～1: 2, face table 7 as follows.(table 7 is seen the literary composition back).
2, determining of ozone reaction time:
Ozone contacts with harmful components in the vehicle exhaust, and reaction is that ozone and reaction of carbon monoxide time are 5～25 seconds very rapidly.The haptoreaction time of nitrogen oxide and ozone is 10～25 seconds, and hydrocarbon (hydro carbons) is 15～35 seconds with the haptoreaction time of ozone.The ozone reaction time that the present invention adopts is 10～20 seconds.Face table 8 as follows.(table 8 is seen the literary composition back)
The sulphide reaction time: 5～20 seconds.
3, reaction temperature determines
The automobile exhaust purifier of the present invention's development has broad temperature accommodation, has solved cold-starting, the purifying problem of motor exhaust.Because the cryogenic engine starting, gasoline combustion is incomplete, CO, NO in the vehicle exhaust
x, the HCization thing the content height, reaction temperature low (50～150 ℃), many purifiers fail to obtain purifying effect preferably.The two step factures that the present invention adopts ozone oxidation and catalyst oxidation to combine preferably resolve this difficult problem.At low temperatures, ozone can be rapidly with the harmful components in the vehicle exhaust of high concentration (CO, NO
x, HC) be oxidized to the harmful components tail gas of low density.Handle through catalyst oxidation, can reach purifying effect preferably, and under high temperature condition, many catalyzer can not adapt to the requirement of high temperature, active decline consequently lost purification function.
Another characteristics of the present invention be this purifier at high temperature (300～500 ℃) still have comparatively ideal purifying effect.Harmful components (CO, the NO in ozone and the vehicle exhaust at high temperature
x, HC ...) reaction more rapidly, thoroughly, at high temperature ozone and catalyst action, active oxygen on the catalyst surface is increased, thereby improved activity of such catalysts, make activity of such catalysts obtain regeneration and recovery, not only improve the purifying effect of catalyzer, also prolonged the working life of catalyzer simultaneously.Face table 9 as follows.(table 9 is seen the literary composition back)
The serviceability temperature scope of automobile exhaust purifier of the present invention is 100～500 ℃.
Cleaning of off-gas technological process of the present invention is: when automobile time-out ozonizer 2 starts simultaneously, air enters ozonizer, and under the effect of glow lamp, airborne oxygen is oxidized to ozone (O
3), ozone enters the vehicle exhaust pipeline by ozone output tube 4 by Venturi tube 5, with CO, NO, HC, the Pb(C in the tail gas
2H
5)
4Effect enters catalyzer purifier 7 by ozone oxidation reaction, with the multicomponent catalyst effect in the purifier, makes that harmful, toxic gas in the vehicle exhaust is purified, purification efficiency reaches 90～99%.
The ozone oxidation method is handled vehicle exhaust situation face table 1 as follows
Preface ozone is measured carbon monoxide hydro carbons nitrogen oxide and is equipped with
Number concentration conditions purification ratio % purification ratio % purification ratio % annotates
250 micrograms/a large amount of
1 root division 20km/h, 74% 62% 86% methyl alcohol
2 * 4 40km/h, 80% 70% 85% formaldehyde
3????60km/h????87%????81%????87%
Table 3
Bar carbon monoxide hydro carbons nitrogen oxide is measured in the agent of preface ozone catalytic
Number concentration consumption spare (year) purification ratio % purification ratio % purification ratio %
1 250 little 2kg half a year 98 96 92
2 grams per liter root 2kg 1 year 95 92 87
3 * 4 2kg 2 years 92 89 82
4 2kg 3 years 87 82 79
Table 4
Stroke kilometer CO purification ratio % NOx purification ratio % HC purification ratio % tetraethyllead purification ratio %
10,000 kilometer 98 96 97 92
20,000 kilometer 97 95 94 90
30,000 kilometer 95 94 93 87
Table 5
Stroke kilometer CO purification ratio % NOx purification ratio % HC purification ratio % tetraethyllead purification ratio %
10,000 kilometer 99 97 98 96
20,000 kilometer 98 95 96 94
40,000 kilometer 96 93 95 92
Table 6
Stroke kilometer CO purification ratio % NOx purification ratio % HC purification ratio % tetraethyllead purification ratio %
5000 kilometer 98 96 97 93
10,000 kilometer 97 95 96 92
1.5 ten thousand kilometer 95 93 94 90
20,000 kilometer 94 91 92 89
Table 7
Ozone charging quantity CO purification ratio % NO
xPurification ratio % HC purification ratio % remarks
1∶0.5????65%????72%????58%
1∶1????97%????92%????89%
1∶2????98%????95%????95%
1∶5????99%????97%????95%
Table 8
Ozone reaction time CO purification ratio % NO
xPurification ratio % HC purification ratio % remarks
5～10 seconds 72% 68% 59%
10～20 seconds 95% 92% 91%
20～50 seconds 97% 94% 92%
Table 9
Reaction temperature CO purification ratio % NO
xPurification ratio % HC purification ratio % remarks
100～200℃????90%????89%????91%
200～300℃????95%????94%????96%
300～500℃????97%????96%????98%
Claims (2)
1, a kind of ozone of forming by Venturi tube, catalyst tank etc.--catalyst method automobile tail gas purifier, it is characterized in that: Venturi tube (5) is connected with the ozone output tube (4) of ozonizer (2), several ozone generating pipes (3) are installed in the ozonizer (2), are utilized fixed plate (1) that ozonizer (2) and catalyst tank (7) are combined into one and are fixed on the automobile exhaust pipe place.
2, ozone-catalyst method automobile tail gas purifier according to claim 1 is characterized in that: the ozone generating pipe of installing in the ozonizer (2) (3) is 2～10 when counting.
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|---|---|---|---|
| CN92112614A CN1027828C (en) | 1992-11-11 | 1992-11-11 | Ozone-catalyst method automobile tail gas purifier and technology |
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|---|---|---|---|
| CN92112614A CN1027828C (en) | 1992-11-11 | 1992-11-11 | Ozone-catalyst method automobile tail gas purifier and technology |
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| CN1027828C true CN1027828C (en) | 1995-03-08 |
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1992
- 1992-11-11 CN CN92112614A patent/CN1027828C/en not_active Expired - Fee Related
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|---|---|---|---|---|
| US6893617B2 (en) | 2001-06-14 | 2005-05-17 | Delphi Technologies, Inc. | Apparatus and method for retention of non-thermal plasma reactor |
| US7078000B2 (en) | 2001-06-14 | 2006-07-18 | Delphi Technologies, Inc. | Apparatus and method for mat protection of non-thermal plasma reactor |
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| CN1070984A (en) | 1993-04-14 |
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