CN101298057A - Carrier for exhaust-gas purification - Google Patents
Carrier for exhaust-gas purification Download PDFInfo
- Publication number
- CN101298057A CN101298057A CNA2008100928467A CN200810092846A CN101298057A CN 101298057 A CN101298057 A CN 101298057A CN A2008100928467 A CNA2008100928467 A CN A2008100928467A CN 200810092846 A CN200810092846 A CN 200810092846A CN 101298057 A CN101298057 A CN 101298057A
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- China
- Prior art keywords
- belt body
- carrier
- exhaust
- gas purification
- waste gas
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- 238000000746 purification Methods 0.000 title claims abstract description 100
- 239000002912 waste gas Substances 0.000 claims description 195
- 239000003054 catalyst Substances 0.000 claims description 102
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- 229910052751 metal Inorganic materials 0.000 claims description 81
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- 239000000126 substance Substances 0.000 claims description 42
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- 229910000679 solder Inorganic materials 0.000 claims description 26
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- 229930195733 hydrocarbon Natural products 0.000 claims description 22
- 150000002430 hydrocarbons Chemical class 0.000 claims description 22
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 19
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229910052697 platinum Inorganic materials 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
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- 229910000420 cerium oxide Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 4
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- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims description 3
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- 239000004202 carbamide Substances 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- 238000000576 coating method Methods 0.000 description 4
- 229910052878 cordierite Inorganic materials 0.000 description 4
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 4
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- 229910001868 water Inorganic materials 0.000 description 2
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A carrier for exhaust-gas purification is disclosed, which is able to effectively protect against getting clogged with the particulate matters in a filter having carriers. The carrier is constituted with a web corrugated to have straight and/or zigzag ridges and then wound up into a column. The carrier for exhaust-gas gas purification is made of the web of wire netting or nonwoven metallic fabric, which is embosed to have ridges and grooves extending at least in a widthwise direction and further wound up spirally or stacked on top of the other into the column.
Description
Technical field
The present invention relates to a kind of carrier for exhaust-gas purification, this carrier for exhaust-gas purification is applied to waste gas purification apparatus, this waste gas purification apparatus makes the waste gas contact and passes through carrier, and burn to being included in harmful substance in the waste gas, redox reaction, come purifying exhaust air thereby remove this harmful substance.
Background technology
In the past, about the following waste gas purification mode of Diesel engine by known, that is, and for SOF (solubility organic principle), the NO among the HC in the purifying exhaust air, CO, the PM (particle matter)
XEtc. harmful substance, with oxidation catalyst or NO
XReducing catalyst is supported on the honeycomb substrate of cordierite, and replaces the end that (alternate) seals the exhaust steam passage of honeycomb substrate, and make waste gas flow through the wall of honeycomb, and on the wall of honeycomb substrate, catch PM, thus purifying exhaust air.There are two types in catalyst with honeycomb substrate, a kind of is the end of alternately sealing the gas passage of each honeycomb, seizure is included in the honeycomb substrate of the PM in the waste gas, another is the end of not sealing the gas passage of each honeycomb, make waste gas flow through gas passage, thus the honeycomb substrate of the harmful substance in the purifying exhaust air.
And Diesel engine is as CO
2The minimum engine of discharge capacity is restudied, and also adopts the car of Diesel engine increasing on the car always.Carrying diesel particulate filter (DPF:Diesel Particulate Filters) recently on a lot of vehicles, (PM) captures on the ceramic honeycomb with particle matter, and under the effect of catalyst with low-temperature burning and burn, thereby purifying exhaust air.And about being included in the PM in the waste gas, its most constituent is the hydrocarbon of unburned carbon black or heavy oil, therefore as long as with the DPF clean-burning fuel, just can not discharge with microparticle.Generally, the catalyst that is supported on the filter makes carbon black burning since about 300 ℃, perhaps makes the NO in the waste gas be oxidized to NO
2, effectively utilize NO with this
2
In above-mentioned ceramic honeycomb, especially, has the carrier of alternately not sealing the structure of gas passage end, in order to increase the wall thickness that reduces honeycomb with the contact area of waste gas, do the effort of the mesh count (per 1 square inch mesh count) that increases honeycomb, in the middle of the practical application of used for diesel engine honeycomb substrate, adopt 200～400 eyed structures.And, with respect to pottery system honeycomb, also realized practicability with carrier with the exhaust gas purifying catalyst of this honeycomb of heating resisting metal manufacturing.This metal beehive has and replaces the flat thin plate with the corrugated sheet of the tabular shaping of ripple peace generate shape overlapping and be wound into circinate structure, and constitute minimal thickness by thickness and keep intensity, increase the area that contacts with waste gas by the mesh count that increases honeycomb simultaneously plate.
On the other hand,,, and the waste gas of in print automobile also needed to purify,, actively pushing forward DPF is carried on the automobile from this viewpoint not only to new car in order to purify the atmosphere in urban district.Yet, when importing DPF in the existing car that is using at present, owing to can not carry out Comprehensive Control explicitly with motor driven, therefore the situation of DPF cisco unity malfunction takes place often.
As the filter that can be used in the waste gas purification purposes, in recent years, bring into use sheet metal and the non-woven fabric compounded filter that forms of metal.The guider of the sheet metal of this filter makes backblast to the metal nonwoven, thereby the particulates emission material in the seizure waste gas, this structure of filter complexity is limited to 40～50% on the slip of PM, and existence can not be brought up to the above difficulty of this scope.At metal beehive, though the contact area of increase and waste gas is the comparison effective method,, following honeycomb has also been proposed in addition, that is, make the waste gas that in the gas passage that the mesh of honeycomb constitutes, flows that turbulent flow take place, make waste gas energetically with the catalyst contacting structure.This honeycomb increases surface area by plate-shaped is become open-celled structure, though loss is arranged in this, but in gas passage, produce turbulent flow, by turbulent flow, waste gas and catalyst [are for example actively contacted, Next generation catalysts areturbulent:Development of Support and Coating:2004-01-1488 is with reference to internet google].
And, disclosed exhaust gas purification catalyst carrier is when forming multiple scroll in the flat 8-196918 communique of TOHKEMY, be placed in the tubular shell of both ends open, turbulent generating unit is set on the coiled sheet of the catalyst carrier in housing, this turbulent flow generating unit forms the variation face that flows that changes wind, and be provided with and stop that the stop section that breaks away from takes place the catalyst carrier of putting into enclosure interior, thereby make the gas that flows through that turbulent flow take place, in the reaction time of prolongation and catalyst, therefore can improve purifying property.
And, the disclosed exhaust gas purifying catalyst of the flat 6-2536 communique of TOHKEMY has urceolus, first honeycomb ceramics of upper reaches survey and second honeycomb ceramics of downstream side with carrier structure, first honeycomb ceramics is by giving prominence to from second honeycomb ceramics and to the holding member that axial upstream side extends, keeping and the non-contacting state of urceolus.Clip air layer between first honeycomb ceramics and the urceolus, thereby prevent heat release from first honeycomb ceramics.
And, the disclosed exhaust gas purifying catalyst metallic carrier of the flat 1-123638 communique of TOHKEMY, reason because of the catalyst of the purification that is used in waste gas such as automobile exhaust, has the honeycomb of alternately arranging metal plate and ripple plate, and begin to be divided into a plurality of to downstream side from the upstream side of waste gas, with the whirlpool shape of each overlapping arrangement in dull and stereotyped end of the honeycomb structured body of the honeycomb structured body of upstream side and downstream side or the honeycomb structured body of lamination shape, cover along the outer peripheral face of the netted hole direction of honeycomb structured body with cylindrical shell, gripper shoe is installed at two ends at this cylindrical shell, and is fixed on inner barrel by gripper shoe.
And the disclosed waste gas purification apparatus of the flat 10-159552 communique of TOHKEMY reduces or removes the carbon black shape particle in the waste gas that Diesel engine discharges, and has NO is oxidized to NO
2First catalyst and second catalyst that hydrocarbon, carbon monoxide, volatile organic component are carried out oxidation, make be trapped on the second catalyst monolithic (monolith) or among carbon black shape particle at the NO that contains from first catalyst
2Gas in burn, thereby the monolithic that uses as first catalyst carrier is suppressed to Min. with the seizure of carbon black shape particle.
And, the waste gas filter of the disclosed purification of diesel engine exhaust gas of JP special table 2005-534487 communique is made of banded filter course and the metal forming that the part has filter house, and filter course has contact site and filter house, wherein, this filter house can make the material that fluid flows through constitute by having, this contact site has the catalyst activity cover layer of the gas componant that is used for conversion waste gas, and this filter house is used for filtering and remove degranulation from waste gas.
And, the disclosed waste gas purification apparatus that has heating unit of JP special table 2003-509620 communique has catalyst carrier and electric heating unit, this catalyst carrier is configured in the display pipe, and has a honeycomb that waste gas is flow through, the two ends of this heating unit have electric contact terminal, in this heating unit, come the stream of regulation complications with the gap by electric insulation, the honeycomb ceramics of this heating unit is fixed on the catalyst carrier by the electric insulation support unit, and this honeycomb ceramics is provided on catalyst carrier that waste gas flows to dirty.
Yet, in Diesel engine, NO
XBe in the relation that (trade off) selected in compromise with PM, be difficult to its minimizing, and, because therefore oxygen concentration height in its waste gas of Diesel engine effectively reduces NO by three-way catalyst in petrol engine
XMethod, be difficult to use in Diesel engine.Further, as the carbon black of the main component of PM because of the oxidizing temperature height, so need special minimizing device.Though there is the DPF that purifies PM with catalyst-loaded filter, but for wearing out of catalyst, by prior more catalyst loadings such as platinum are guaranteed performance in filter, but, this vehicle for long especially long distance travel is inadequate, and the possibility that can not bring into play the original performance of removing PM from waste gas becomes greatly.
And, though the carbon black of PM main component is filtered and burning by filter, but travel on continuously at the vehicle that carries DPF under the situation of road etc. of obstruction, the frequency of ignition temperature of PM that the engine exhaust temperature reaches catalyst is extremely low, its result, because of the carbon black blocking filter, this causes the obstruction of blast pipe, thereby has the possibility that causes vehicle not travel.Further, be deposited on carbon black on the filter when surpassing the ignition temperature of carbon black because of the variation of driving conditions, the burning of PM heavy explosion can cause the damage of DPF, or burn out filter, or even breaking out of fire.Therefore, nearest deposition by detection carbon blacks such as pressure sensors is when the deposition of carbon black surpasses certain value, by the additional next carbon black that initiatively burns of device that improves EGT.And device following in being provided with the engine of waste gas purification apparatus promptly, uses common rail (common rail) fuel injection device to come burner oil and make its burning in the later half and instroke of expansion stroke, thereby improves delivery temperature by known; Perhaps, come the above-mentioned fuel that sprays of oxidation heating by the oxidation catalyst that is arranged on the rear; Perhaps, come oxidation heating fuel by the oxidation catalyst that is arranged on the rear, thereby improve EGT, above-mentioned fuel is from the fuel supply system that is arranged in addition on the upper reaches that PM removes device.Though this PM cleaning system is dangerous low because of the carbon black plugged filter, but, be under the low situation of the frequency of high temperature waste gas such as running at a low speed, drive the waste gas temperature elevation system that uses described fuel, thereby waste fuel in vain, therefore the problem that exists fuel cost to increase.Especially, under the low situation of PM activity of such catalysts temperature, the driving of waste gas temperature elevation system is increasing, and fuel cost increases.
Summary of the invention
The object of the present invention is to provide a kind of carrier for exhaust-gas purification, it is in order to address the above problem, to constitute the structure of the gas passage that waste gas was passed through self of carrier in fundamentally different with existing product modes.And, in order to bring into play the performance of the carrier structure upper limit that surpasses the honeycomb that forms by thin plate, with wire netting or metal nonwoven fabric roll around or stacked, form cylinder or prismatic column, and, between belt body, form the exhaust steam passage that extends with straight line or zigzag, make the space of waste gas hardly by belt body, and make most of waste gas along the contact of the channel wall of belt body and pass through, thereby make waste gas that turbulent flow take place, increase the contact area of waste gas and belt body wall simultaneously, the effect of the catalyst that is supported by the belt body surface improves the redox reaction that harmful substance is carried out, thereby removes harmful substance, avoid taking place as existing, stop up or phenomenon of blocking because of particle matter causes the carrier mesh.In addition, particle matter is contacted in the belt body wall that impacts passage to be passed through, make waste gas unimpededly flow through passage often, and according to circumstances make the impact of waste gas and belt body or make a part of waste gas pass through belt body, catch harmful substances such as particle matter along exhaust steam passage at the belt body wall, for example, on crooked route, be detained or the seizure particle matter, and the engine waste gas heat when utilizing the engine exhaust temperature to raise heats and fires described particle matter, perhaps under the effect of catalyst, about 70～99% of the harmful substance in the waste gas is carried out redox and remove, thus purifying exhaust air.And, this carrier for exhaust-gas purification is applied in the waste gas purification apparatus of the reduction rate of particle matter in the waste gas that can guarantee about 40～80%.
The present invention relates to a kind of carrier for exhaust-gas purification, the tubular shell that it has the carrier that supported catalyst and places described carrier, described catalyst are used for by to being included in the NO of waste gas
X, HC, particle matter and coal smoke (soot) harmful substance burn or redox reaction and remove the NO that is included in the waste gas
X, HC, particle matter, thereby purify described waste gas; Described carrier is made of the column of belt body being reeled or be laminated into tubular, described belt body is made of wire netting or metal nonwoven, and has a wavy belt body that is configured as many crest lines and many grooves at least, the axle of the described relatively column of described crest line extends with parallel rectilinear form or tilted shape, described groove is between described crest line, and, an end face that is formed with between described belt body along described groove from described column is communicated to the exhaust steam passage of another end face, so that the described waste gas that flows through described exhaust steam passage because of the convex-concave surface of described belt body turbulent flow takes place.
And described belt body is adapted to described wavy belt body and overlaps each other, and it is alternately overlapping perhaps to be adapted to described wavy belt body and tabular belt body, and described tabular belt body is between described wavy belt body.Further, the axle of the described relatively column of described crest line of described wavy belt body tilts with zigzag and extends, and makes described exhaust steam passage form crooked route with this.Under described wavy belt body overlapped each other situation about setting, the described crooked route that is formed by the described crest line of described wavy belt body intersected respectively.Perhaps, described wavy belt body is configured as following shape, promptly, a shape that only alternately repeatedly forms with respect to described column at the described crest line that has gradient on the specific length and the described crest line that only on specific length, extends in parallel, and the described exhaust steam passage that forms along the described groove of described wavy band is made of parallel path and crooked route.
And, described carrier is made of the column of overlapping belt body being reeled or be laminated into tubular, this overlapping belt body is meant, described wavy belt body and described tabular belt body are overlapped as one, and perhaps that the angle of inclination of the described crest line more than 2 is identical or different described wavy belt bodies carries out overlapping belt body as a cover each other.
And, constitute the described wire netting of described belt body or described metal nonwoven by stainless steel or Aludirome constitute.And equitant described belt body is engaged by solder each other, and this solder is pricker or pricker paper tinsel.At least one side end face of described carrier is engaged by described solder further, and soldering portion forms the wire at the intermittence that has predetermined width and extend with the radiation curve-like, perhaps forms the wire that width broadens and extends with the radiation curve-like at outer circumferential side.And when having reeled described wavy belt body, on the position of the presumptive area on the adjacent described belt body of described crest line, the described belt body of described column each other by described solder brazing together at least.Further, on adjacent described belt body, described belt body each other the described presumptive area of soldering the position described column axially on dislocation mutually.
And tilt 10 °～50 ° angle of the axle of the described relatively column of described crest line of described wavy belt body, and described exhaust steam passage forms described crooked route.And in 0 °～50 ° angular range, the gradient more than 2 kinds is adopted in the combination of the described crest line of described wavy belt body in the described zigzag gradient of the axle of described relatively column.Further, a plurality of described column series connection are provided in the described tubular shell, and the angle of inclination of the described crest line of the described wavy belt body of described column is identical with downstream side or different at the upstream side of described waste gas.And the linear diameter that constitutes the metal wire of described wire netting is 0.03mm～0.35mm.
And the mesh of described wire netting is 16～200 meshes.The mesh of described wire netting at the mesh number on the ordinate of metal mesh belt more than the mesh number on the horizontal line at described metal mesh belt, described mesh number on the described ordinate of described metal mesh belt is set at 30～100, and the described mesh number on described horizontal line is set at 60～200.
And the wavy concavo-convex spacing of described wavy belt body is 1mm～6mm.Further, the wavy concavo-convex height of described wavy belt body is 0.5mm～5mm.
And, on the wire surface of the described belt body that constitutes described carrier, be coated with the pottery more than at least a in aluminium oxide, silica, zirconia, the cerium oxide.Further, on the surface of described overlay, support one or more catalyst of from platinum, silver, potassium, palladium, iridium, iron, copper, barium, selecting.
And, when described waste gas when being formed on the described exhaust steam passage between the described belt body along described groove, when being included in described harmful substance in the described waste gas and contacting with described belt body with the state flow mistake of turbulent flow, and under the effect of described supported catalyst, carry out redox reaction supporting, be removed with this.Further, being supported on described supported catalyst is the NO that oxidation catalyst, three-way catalyst, hydrocarbon class A fuel A, ammonia or urea are played a role as reducing agent
XReducing catalyst.
And, described carrier for exhaust-gas purification is: set the filter that is built-in with described carrier in the exhaust passage of discharging described waste gas, make described waste gas by described filter, so that described belt body is caught described harmful substance, and make described harmful substance contact by described belt body, with described harmful substance is burnt, redox reaction, thereby described harmful substance is removed, purify described waste gas with this.
That is, described carrier for exhaust-gas purification can be installed to waste gas purification apparatus and uses.
And, described belt body is formed with jog on width, described belt body is being reeled or be laminated under the state of described column, mutually stacked described jog makes described belt body engaging mutually so that the flow direction of the waste gas of described belt body described column axially on do not misplace mutually.
And, described filter is made of the described column of overlapping belt body being reeled or be laminated into tubular, described overlapping belt body is meant, described wavy belt body and described tabular belt body are overlapped as one, and perhaps that the angle of inclination of the described crest line more than 2 is identical or different described wavy belt bodies carries out overlapping belt body as a cover each other.Further, at least one side end face of described filter is engaged by solder, and soldering portion forms the wire at the intermittence that has predetermined width and extend with the radiation curve-like, and perhaps the degree of soldering portion is wide broadens and extend with the radiation curve-like at outer circumferential side.
And described filter constitutes in a plurality of described columns mode that sets of connecting on the flow direction of described waste gas.Further, the angle of inclination of the described crest line of described wavy belt body is with little at the upstream side of described waste gas and be shaped in the big mode of downstream side.Will at least 3 described belt bodies be configured as under the situation of described wavy belt body as a cover, described filter, the thin and thick mode of outside mesh sets and forms with the inboard mesh of described belt body.
And, at least 3 described belt bodies are being configured as under the situation of described wavy belt body as a cover, described belt body with little at the linear diameter of inboard metal wire and mesh thin and big and mode that mesh is thick sets at the linear diameter of the described metal wire in the outside, is constituted described filter with this.
And, replace overlapping described spacing from the upper reaches of waste gas stream more the upper reaches to the dirty described wavy belt body that just becomes more little and described spacing from waste gas stream constitute described filter more to the dirty described wavy belt body that just becomes big more with this.
And, when described waste gas when being formed on the described crooked route between the described belt body, the described particle matter that is contained in the described waste gas flows through contacting simultaneously with the described wire netting of described belt body or metal nonwoven, perhaps contact for the time being is detained in described crooked route, thus oxidized burning.And, when described waste gas passes through the described crooked route of described exhaust steam passage, process along with the time, catch described particle matter in described crooked route and supporting and carry out oxidation reaction and be removed under the effect of described supported catalyst, described exhaust steam passage is formed between the described belt body by the described groove of described wavy belt body.
This carrier for exhaust-gas purification constitutes as described above, therefore, the wavy belt body and the open and flat tabular belt body that are configured as tabular shaping metal mesh of ripple or metal nonwoven is stacked, and reel or be laminated into helical form, many grooves along wavy belt body form honeycomb, and form along the channel inlet of wavy belt body and outlet not by the exhaust steam passage of sealing and connecting, and, convex-concave surface by the exhaust steam passage upper belt body, the contact area of waste gas is increased, and by increasing waste gas and the oxidation catalyst that is supported on the belt body, three-way catalyst, NO
XTouch opportunity between the various catalyst such as selective reduction catalyst, and with HC, NO
X, the redox of CO harmful substance is water, carbon dioxide, nitrogen, thereby can promotes to remove the performance of harmful substance.Especially, this exhaust gas purifying catalyst carrier structure, being configured as zigzag by the crest line with the tabular belt body of ripple is zigzag with channel formation, and when increasing the contact area of waste gas, the convex-concave surface of the belt body by constituting wire netting or metal nonwoven gets muddled exhaust-gas flow, the tabular wall of waste gas and ripple is contacted and flow through when impacting, and,, guarantee to carry out the high-performance of redox reaction by increasing the touch opportunity between harmful substance and the catalyst.And waste gas is not by belt body, and along the groove formation exhaust steam passage of wavy belt body, therefore, exhaust steam passage is not blocked because of particle matters such as carbon blacks, can guarantee unimpeded often.
And this carrier structure has following excellent properties, promptly, because catalyst-loaded carrier and the contact area between the waste gas are big, therefore has high purifying property, thus, carrier itself can either realize that the miniaturization formation can realize low-cost production again, and, the NO of use reducing agent
XThe selective reduction catalyst has high performance, can realize making size to dwindle half and get miniaturization, because carrier is to be made by metal, so problem such as peel off as pottery does not take place, has excellent durability.And carrier is by changing the specification (linear diameter, mesh number, number) of wire netting, and the section shape of the exhaust steam passage that will be formed by the ripple plate is changed into the crooked route of parallel path or zigzag fashion, can control treatment effeciency with this.By exhaust steam passage is formed crooked route, can obtain to catch effectively and remove the function of the particle matter in the waste gas.And this carrier structure replaces existing stainless steel sheeting and will be wound into helical form or stacked by the belt body that metal or metal nonwoven form, thereby makes carrier, and the free degree of the carrier that therefore is shaped is improved significantly, makes easily and cheapness.For example, in existing 20～30 μ m stainless steel sheeting, almost can not stretch etc., but the raw material of carrier is in the belt body that is made of metal or metal nonwoven as the present invention, the free degree height that is shaped, can be simply and qurer form.That is, under the situation of the thin plate of 20～30 μ m, almost can not stretch etc., but under situation about being shaped by wire netting or metal nonwoven, the free degree improves.
And, this carrier structure is groove between crest line and this crest line so that belt body by a pair of concavo-convex forming tool or only push the method for shaping, can be shaped simply, and wavy belt body is easy to manufacture and cheap, and belt body twines mutually, so belt body need not to engage each other.
In having the waste gas purification apparatus of this carrier for exhaust-gas purification, because divided exhaust steam passage and catch particle matter (below, PM) etc. part, therefore filter can not stop up because of PM etc., the catch rate of PM can be guaranteed often about 40～80%, and, can pass through coal smoke, HC, NO
XBurn or under the effect of catalyst, carry out redox reaction etc. harmful substance, thereby be removed, thereby filter can not stop up because of PM.Exhaust steam passage along wavy belt body groove forms zigzag, and the concavo-convex wall of the wavy belt body of backblast also flows through, and can catch the PM in the waste gas that impacts, even and seizure PM, exhaust steam passage does not stop up yet, and wherein, this wavy belt body is made of wire netting or metal nonwoven.The specification (linear diameter, mesh number, number) of the mesh by changing the belt body wire netting perhaps forms the section shape of the exhaust steam passage of wavy belt body by change, change jagged shape, thereby can adjust the catch rate of PM.Promptly, in filter, harmful substances such as the PM in the waste gas flow through when the channel wall with crooked route or parallel path contacts, and this harmful substance carried out heating flame or redox reaction, even were it not for the PM in the harmful substance is carried out heating flame or oxidizing fire immediately, PM is in the state that is trapped in wall, the exhaust steam passage of filter itself does not stop up at channel wall yet, and as time goes by the PM that is captured is carried out heating flame or oxidizing fire, thereby be removed, thereby, can realize from waste gas, removing the rate of removing of PM 40～80%, waste gas often can be through flowing through passage for a long time glibly, and bring bad influence for the operating condition of engine.Be formed with crooked route and parallel path on the filter in this waste gas purification apparatus, because the part of exhaust steam passage and seizure PM forms respectively, therefore exhaust steam passage does not stop up, and the particle matter that is captured is along with the elapsed time, oxidizing fire and being removed little by little under the effect of catalyst, perhaps the EGT of engine raises, thereby by the waste gas heat heating flame or by NO
2Oxidation is removed, thereby can improve the capturing efficiency of PM in the waste gas.
Description of drawings
Fig. 1 is the key diagram that expression forms the operation of carrier for exhaust-gas purification of the present invention.
Fig. 2 is the front view that is expressed as follows state, that is, and and the wavy belt body of pie graph 1 carrier and the equitant state of tabular belt body.
Fig. 3 is that expression is wound into the front view that helical form forms column by the equitant belt body with Fig. 2.
Fig. 4 is the stereogram that expression forms the operation of column, that is, will have the wavy belt body coiling of different gradient crest lines and form this column.
Fig. 5 is that expression is reeled the wavy belt body of Fig. 4 and the front view of the column that forms.
Fig. 6 is the side view of the column of presentation graphs 5.
Fig. 7 is a key diagram of representing 2 crest lines are adapted to crossing condition, and wherein, these 2 crest lines are crest lines of the wavy belt body of pie graph 4 columns.
Fig. 8 is the cutaway view of the I-I section of presentation graphs 7 columns.
Fig. 9 is the cutaway view of the II-II section of presentation graphs 7 columns.
The key diagram of the state during Figure 10 A exhaust steam passage that to be the slow waste gas of expression flow velocity form by the groove along column.
The key diagram of the state during Figure 10 B exhaust steam passage that to be the fast waste gas of expression flow velocity form by the groove along column.
To be expression be bonded on belt body the key diagram of the state on the end face of filter with solder to Figure 11 A, and above-mentioned joint is meant the state that engages with the proportional several sections of channel cross-sectional area of filter.
To be expression be bonded on belt body the key diagram of the state on the end face of filter with solder to Figure 11 B, and expression disconnects from the central part of the filter state to the junction surface that peripheral part extends.
To be expression be bonded on belt body the key diagram of the state on the end face of filter with solder to Figure 11 C, and the expression state that will strengthen to the composition surface at the junction surface that peripheral part extends from the central part of filter.
Figure 12 is expression, and series connection sets under the state of column of 3 carriers in housing, the two side ends of column is fixed on the key diagram of an example on the housing with the block parts.
Figure 13 is expression, and series connection sets under the state of column of 3 carriers in housing, and housing is fixed on column with recess the key diagram of another example on the housing.
Figure 14 is expression, and series connection sets under the state of column of 3 carriers in housing, the two side ends of column is fixed on the key diagram of another example on the housing with the block parts.
Figure 15 is expression, and series connection sets under the state of column of 3 carriers in housing, and housing is fixed on column with recess the key diagram of another example on the housing.
Figure 16 is the key diagram that expression will constitute the state that mode that 2 crest lines of belt body of the column of filter intersect sets.
Figure 17 is the sectional side elevation that passes filter center, is equipped with the column of an example in the housing of this filter, and this column is the belt body that is formed with jog on width to be reeled form.
Figure 18 is the sectional side elevation that passes filter center, is equipped with the column of another example in the housing of this filter, and this column is the belt body that is formed with jog on width to be reeled form.
Figure 19 is the curve map of result of the test of the reduction rate of the CO of harmful substance in the waste gas of comparison product of the present invention and existing product and HC.
Figure 20 is the curve map of the result of the test of the purifying rate of the HC of harmful substance in the waste gas of comparison product of the present invention and existing product.
Figure 21 is the NO of harmful substance in the waste gas of comparison product of the present invention and existing product
XThe curve map of result of the test of purifying rate.
Figure 22 is the curve map of the result of the test of the relation between the reduction rate of particle matter of comparison product of the present invention and existing product and filter inlet are pressed.
The curve map of Figure 23 PM purifying rate that to be expression brought into play with the crest line angle of the corresponding wavy belt body of engine speed.
Figure 24 is expression, about the filter of this waste gas purification apparatus, the accelerator in when igniting hypothesis close the time the curve map of melting loss test.
The specific embodiment
The waste gas purification apparatus of built-in carrier for exhaust-gas purification of the present invention is applicable to following situation, promptly, make the waste gas that the source takes place from engine, burner and gas by being provided in the filter on the exhaust passage, and under catalyst action to being included in particle matter (PM), coal smoke (soot), HC, the NO in the waste gas
XBurn etc. harmful substance, perhaps carry out redox reaction and make its conversion and remove, thus purifying exhaust air.For example, be applicable to relatively in the filter that is provided on the blast pipe that wherein, this blast pipe ejects the waste gas from new car or used engine, especially from the waste gas of Diesel engine.
Below, with reference to accompanying drawing, the waste gas purification apparatus of built-in carrier for exhaust-gas purification of the present invention is described.
This waste gas purification apparatus built-in filter 20, this filter 20 is made of carrier catalyst-loaded in the gas extraction system 1 (being generically and collectively referred to as Reference numeral 1), and this carrier 1 will be included in particle matter (PM), coal smoke, HC, the NO from the waste gas that the outlet of engine, burner, burner, flue etc. is discharged
XEtc. harmful substance, redox reaction Cheng Shui, carbon dioxide and nitrogen and be removed under the effect of catalyst.
As Fig. 1～shown in Figure 3, carrier 1 in this carrier for exhaust-gas purification is characterised in that, wavy belt body 3 of alternate configurations and tabular belt body 13, wherein, the belt body 8 that this wavy belt body 3 is shaped and is formed by wire netting or metal nonwoven, perhaps as Fig. 4～shown in Figure 6, dispose one or more wavy belt bodies 3, and to be wound into the whirlpool shape be helical form or stacked, thereby constitute column 4, and form exhaust steam passage 5, the groove 6 of the wavy belt body 3 that this exhaust steam passage 5 is made along shaping belt body 8 is communicated to flow export 10 (Figure 12～Figure 15) of another end face from the inflow entrance 9 of an end face of column 4.Column 4 forms the cylinder body shape of cylinder, prism etc. in terms of overall.End along the groove 6 formed exhaust steam passages 5 of wavy belt body 3 is not sealed, and is communicated to the flow export of another end face from the inflow entrance of an end face, has formed a plurality of honeycombs (honeycomb) structure of extending or extending with zigzag along straight line.In this waste gas purification apparatus, the carrier 1 with exhaust steam passage 5 of Figure 12, rectilinear form shown in Figure 13 is applicable to HC, NO
XDeng the purification of harmful substance, have carrier 1 as Figure 14, zigzag exhaust steam passage 5 shown in Figure 17 and be applicable to and be included in HC, NO
XIn the purification of harmful substance of particle matter 18 grades.
Belt body 8 both can be the wire netting that forms with various structure braidings, also can be the metal nonwoven.Wavy belt body 3 can form in the following way, that is, and and by the forming tool of shapes such as gear-like, with dull and stereotyped belt body 8 at the groove 6 that is configured as on the width between crest line 7 and the crest line 7, and, by belt body 8 is configured as tabular, also can form tabular belt body 13.And the belt body 8 that forms column 4 is supporting the catalyst of removing harmful substance by redox reaction in its surface.Because belt body 8 is shaped by wire netting or metal nonwoven, and be formed with a plurality of concavo-convex on its surface, on convex-concave surface, supported catalyst, thereby increased the ability that to bring into play high purification waste gas because of the contacted chance of waste gas G and belt body surface by the carrier 1 that belt body 8 is constituted.Because of waste gas G contacts with the belt body wall of carrier 1 and flows through, thereby get muddled both turbulent flows (disturbed flow), and the touch opportunity between waste gas G and the catalyst and increasing time of contact, thereby can promote the redox of harmful substance.The belt body 8 that constitutes carrier 1 is being subjected to the thermal stress of low temperature and high temperature often repeatedly, and Temperature Distribution is also different because of the position of belt body 8.The wire netting of belt body or metal nonwoven are made of very thin metal wire respectively, therefore can allow the distortion that heat distribution causes neatly, and local plastic deformation etc. do not take place, therefore owing to be coated in the pottery etc. on surface and do not come off, so the durability height.Carrier 1 produces turbulent flow by making waste gas G, strengthen waste gas significantly and be supported on contacting of carrier 1 lip-deep catalyst in modes such as coatings, thereby can irrespectively improve purifying property with the kind that is supported on the catalyst on the carrier 1, as long as perhaps seek out the purifying property that equates with existing purifying property, then the present invention can realize significantly miniaturization.
And, though it is not shown, but make wavy belt body 3 pass the concavo-convex forming tools such as running roller type pressure (press) machine of a pair of zigzag, perhaps pushing between running roller only, just wavy belt body 3 can be configured as by the groove 6 between crest line 7 and the crest line 7 constitute wavy.As Fig. 1 and shown in Figure 10, the crest line 7 of wavy belt body 3 is configured as the shape that extends in parallel or favours the shape of the axle of column 4, specifically, as Fig. 4～shown in Figure 6,10 be configured as zigzag with respect to the axle of column 4 from inflow entrance 9 to flow export with forming tool.Thereby, extend along groove 6 abreast and have a plurality of parallel paths 17 thereby carrier 1 forms the crest line 7 of wavy belt body 3, thereby perhaps carrier 1 crest line 7 that forms wavy belt body 3 extends along groove 6 agley and has a plurality of crooked routes 16.And, as Fig. 5, Fig. 7 and shown in Figure 16, at least 2 wavy belt bodies 3 are wound into helical form as one group, thereby form column 4, wherein, above-mentioned wavy belt body 3 is that juxtaposition becomes the angle of inclination of crest line 7 to extending in the other direction for mutual intersect (cross).Figure 16 shows the mutually stacked state of 2 metal tapes 3, and the wavy belt body 3 usefulness solid lines of a side are represented, wavy belt body 3 with dashed lines of opposite side are represented, and then the crest line 7 that shows wavy belt body 3 is laminated into the state that intersects.Perhaps, though not shown, also can be by following two parts are alternately repeated to form the crest line 7 that is formed on the wavy belt body 3, above-mentioned two parts are meant, with respect to the axle of column 4, only in specific length part that tilts and the part that only on specific length, extends in parallel.This waste gas purification apparatus is characterised in that, when waste gas G passes through the exhaust steam passage 5 of groove 6 formation between belt body 8, harmful substance among the waste gas G becomes turbulent flow when contacting with belt body 8, and be burned or be carried out redox reaction, thereby become water, carbon dioxide and nitrogen and be removed.
As shown in Figure 7, be formed in the crooked route 16 of wavy belt body 3, waste gas G flows through to direction shown in the arrow, and this wavy belt body 3 constitutes carrier 1.As Fig. 7～shown in Figure 9, in carrier 1, when waste gas G passes through the crooked route 16 of formation between the wavy belt body 3, particle matter 18 in the waste gas flows through when contacting with wavy belt body 3, the bend that perhaps is trapped in the crooked route 16 that is formed by the groove between the crest line 76 for the time being grades in the zone, at this, the oxidized gradually burning of particle matter 18 and burning.Along with the particle matter 18 that is included among the waste gas G flows through crooked route 16 with waste gas G, flow through when contacting with the belt body wall of wavy belt body 3, the wire netting by being supported on belt body 8 or the effect of the catalyst on the metal nonwoven, be removed, the zone but the bend that a part of particle matter 18 is trapped in crooked route 16 for the time being grades, therefore, EGT increases and is burnt by waste gas heat heating or by NO
2Oxidation is removed, and perhaps, because of the oxidized gradually burning of the effect of catalyst and burnt, therefore, crooked route 16 can not stopped up by particle matter 18, makes waste gas G unimpededly to flow through often.
And (a) of Figure 10 A is the cutaway view of this waste gas purification apparatus, (b) is the vertical view of this waste gas purification apparatus, and shows flowing through of waste gas G under the slow situation of gas flow rate.And (a) of Figure 10 B is the cutaway view of this waste gas purification apparatus, (b) is vertical view, and shows flowing of waste gas G under the fast situation of gas flow rate.As shown in figure 10, the flow velocity of waste gas G is fast more, waste gas G flows through in the tube of filter 20 more abreast, therefore, by add what have minute angle on the flow path of waste gas G is crooked route 16, make on one side on the wall of PM that is included among the waste gas G attached to wire netting that forms exhaust steam passage 5 or metal nonwoven, waste gas G is flow through on one side, and, the slow situation of the fast situation of gas flow rate and flow velocity is compared in tube the characteristic of PARALLEL FLOW and is more strengthened, and its result penetrates the wire netting that constitutes exhaust steam passage 5 walls or metal nonwoven and flows, thereby remove the characteristic of PM and weaken by making PM be attached to wall, and then the PM purifying rate reduces.Similarly, under the slow situation of waste gas flow velocity, then have the situation opposite characteristic high with flow velocity.
And, in this waste gas purification apparatus, the crest line 7 of wavy belt body 3, for column 4 the axle sawtooth the angle of inclination identical or different, and tilt in the scope of axle for column 4, thereby form the crooked route 16 as wrong path of exhaust steam passage 5 with roughly 10 °～50 ° angle.And a plurality of column 4 series connection are provided in the tubular shell 2, and the degree of tilt of the crest line 4 of the wavy belt body 3 of column 4 is identical or different in survey of the upper reaches of waste gas G and downstream side.If consider flowing of waste gas G in the exhaust steam passage 5, then the angle of inclination of crest line 7 is preferably 10 °～50 °.By following method validation the range of tilt angles of crest line 7, that is, and the purifying property of investigation the present invention and the hydrocarbon of the platinum that is supported on existing metal beehive.Think that the present invention can guarantee that one of them reason of high purifying rate is, the surface of the wire netting of belt body 8 or metal nonwoven causes the turbulent flow of waste gas G, thereby increases considerably contacting of waste gas G and catalyst.There is the optimum value for waste gas G in the angle of inclination of crest line 7.Figure 23 shows such situation, and is promptly corresponding with the rotating speed of engine, and the PM purifying rate is according to the angle of inclination of the crest line 7 of wavy belt body 3 and different situations.Promptly, be under 45 ° the situation in the angle of crest line 7, shown in the curve A of Figure 23, at engine speed is under the situation of 500rpm～2000rpm, the purifying rate of PM is good, is under 30 ° the situation, shown in the curve B of Figure 23 in the angle of crest line 7, at engine speed is under the situation of 2000rpm～3500rpm, and the purifying rate of PM is good.Therefore, because engine changes to the high speed of high output of performance significantly from the low speed of idling (idling) running under the road driving condition, and the flow of waste gas G changes therewith together and significantly, so in order to improve the PM purifying rate, with make up angle that a plurality of and low speed is complementary and with the mode of the angle that is complementary at a high speed, change the zigzag angle more than 2 times from the upstream side of waste gas G to downstream side, thereby can obtain the performance of excellent PM purifying rate.
In this waste gas purification apparatus, the upper reaches of waste gas G stream and dirty on change under the situation at angle of inclination of crest line 7 of wavy belt body 3, to be provided in the upper reaches by the filter 20 that the little wavy belt body 3 of angle is made, to be provided in dirtyly by the filter 20 that the big wavy belt body 3 of angle is made, and can bring into play capturing efficiency effectively like this.That is, under the big situation of exhaust gas flow, because EGT also the chances are high temperature, even therefore catch PM, the also oxidized burning of PM is so PM is few for the deposition of filter 20.But exhaust gas flow is little and EGT is also low when low speed, so the many situations of the deposition quantitative change of PM also increase.In this case, if the filter 20 of the wavy belt body 3 that angle is little is provided in the upper reaches, though then be not high catch rate, but can catch PM, thereby the deposition that is arranged on the big filter of dirty angle 20 is reduced, therefore institute can catch PM by filter integral body effectively so that its burden reduces.And, in this waste gas purification apparatus,, thereby can catch PM from low speed to high speed evenly with the big wavy belt body 3 and the belt body 8 of reeling little in angle of inclination of combination crest line 7 with the angle of inclination.And, if the crest line angle of the belt body 8 of 1 carrier 1 is certain, and, then can obtain stable from low speed to high speed performance at the carrier 1 of the different crest line angle more than 2 kinds of arranged in series on the flow path of waste gas G.Perhaps, even will make up the different belt body 8 of crest line angle more than 2 kinds and with its coiling or stacked and, also can access stable from low speed to high speed performance as 1 carrier 1.Further, a plurality of carriers 1 by the different belt body 8 in the angle of inclination that will make up crest line 7 are arranged in series on the flow path of waste gas G, can obtain higher purifying rate, simultaneously, therefore owing to can make a plurality ofly with same size, can reduce the cost of manufacture of carrier 1.
The catalyst that is supported on the carrier 1 can use three-way catalyst, oxidation catalyst, NO
XReducing catalyst (NO
XThe selective reduction catalyst).Even the present invention adopts three-way catalyst, oxidation catalyst, NO
XAny one catalyst in the reducing catalyst also can increase substantially purifying property, if guarantee the purifying property identical with existing carrier, then can carry out miniaturization significantly, and can make with low cost.And, for the NO that uses reducing agents such as urea (perhaps ammonia), light oil
XReducing catalyst more extremely importantly is that waste gas G and the reducing agent that mixes with waste gas G are mixed equably.Under the situation that is equipped on the cleaning system on the car body, need waste gas G and reducing agent to be disperseed equably and mix.In carrier in the past, be difficult to disperse and mix owing to density unevenness takes place the relative waste gas G of reducing agent, but, then can successfully disperse to mix if use product of the present invention.This waste gas purification apparatus constitutes as a purpose to catch PM, still, in addition, also can be with NO
XReducing catalyst is supported on the filter 20.Use the NO of light oil as reducing agent
XReducing catalyst uses the situation of platinum, silver etc. many as catalyst.In this case, owing to have the effect of burning PM, therefore by on filter 20, supporting NO
XReducing catalyst is being caught and burning PM and when purifying, carry out NO
XPurification, thus, can make this waste gas purification apparatus as purifying NO simultaneously
X, PM device play a role.In this waste gas purification apparatus, can on filter 20, support the NO that uses zeolite etc.
XReducing catalyst, and, in the case, also can carry out NO simultaneously by enough same filters 20
XPurification and the seizure of PM purify, thereby can carry out miniaturization to installing itself, and can realize cost degradation.And in the carrier of existing ceramic honeycomb and metal beehive, the waste gas that enters from exhaust gas entrance flows through a certain mesh, and not with state that waste gas in the adjacent mesh mixes under, arrive the outlet of carrier.Yet, a mesh of carrier 1 of the present invention begins from inflow entrance 9 that straight line extends till the flow export 10, simultaneously, mesh is communicated with the porous of adjacent mesh by wire netting or metal nonwoven, thereby so waste gas G flow through mutually with mixing and promote to mix, thus, even be positioned at carrier 1 inflow entrance 9 reducing agent uniformity slightly a little less than, during waste gas G flow through carrier 1, waste gas G proceeded with mixing of reducing agent, its result can obtain high purifying rate.Confirm in the actual tests of using engine, product of the present invention has 3 times SV (l/h) with comparing of existing product, and can access the performance that equates with existing product.Wherein, SV (l/h) is the rate value of gas flow divided by the carrier capacity.
And the wire netting of formation belt body 8 or metal nonwoven are made of the metal wire of stainless steel or Aludirome.And the diameter of the metal wire of the wire netting of formation belt body 8 is preferably 0.03mm～0.25mm, and the mesh (mesh) that constitutes the wire netting of tabular belt bodies 13 with wavy belt body 3 is preferably 30～200 meshes.Further, will at least 2 belt bodies 8 be configured as under the tabular situation of ripple as a cover, be that the mesh of wire netting of the inboard belt body 8 of filter 20 attenuates with carrier 1, and be the mesh overstriking of wire netting of belt body 8 in the outside of filter 20 with carrier 1.The mesh of the wire netting of belt body 8, the ordinate of belt body 8 is different with the mesh number on the horizontal line, and the mesh number on the ordinate of belt body 8 is more than the mesh number on the horizontal line of belt body 8.In this embodiment, the mesh number on the ordinate of belt body 8 is 30～100 meshes, and the mesh number on the horizontal line of belt body 8 is 60～200 meshes.In other words, the ordinate of so-called belt body 8 is meant the metal wire that the length direction of belt body 8 extends, and the horizontal line of belt body 8 is meant the metal wire that the width of belt body 8 extends.In general, the wire netting that forms belt body 8 is woven by ordinate and horizontal line, but the braiding speed of wire netting suffers restraints because of the mesh number of horizontal line.Under the many situations of the mesh number of horizontal line, the speed that can once finish braiding with braider slows down, and, weaves required time lengthening that is, its result, and the operating cost that is used for the braided metal net improves.Yet under the many situations of the mesh number of ordinate, though the operation that ordinate is set to braider slightly increases, the mesh number on the horizontal line reduces, and thus, the braiding required time shortens significantly, thereby improves weaving operation efficient.Therefore, want to reduce the manufacturing cost of wire netting, the raise speed speed of braider braiding of the netting index that reduces horizontal line is effective.On the other hand, for example, the surface area of the per unit area of the wire netting that the wire netting that is made of the horizontal line of the ordinate of 80 meshes and 80 meshes and horizontal line by the ordinate of 120 meshes and 40 meshes constitute becomes identical, and is identical thereby the performance of carrier 1 also becomes.
And, as shown in Figure 2, about the crest line 7 of wavy belt body 3 and the size between the groove 6, to be that concavo-convex interval P is set at 1mm～6mm between the crest line 7 preferably, if P is below the 1mm at interval, then pile with PM etc., in addition because of exhaust steam passage 5 is too narrow and small, if P then can not contact with catalyst because of the too wide waste gas G of exhaust steam passage 5 fully more than or equal to 6mm at interval.And, in the longitudinal direction, change by the big or small identical of the spacing P between the crest line 7 that makes carrier 1 or with it, can change the width dimensions of exhaust steam passage 5, thereby can make waste gas G that desirable disorder takes place in flow process.For example, at wavy belt body 3, though not shown, can alternately form the flow path upstream side is big and downstream side is little spacing P and spacing P in contrast to this, perhaps can be in the longitudinal direction form with the spacing P of identical size.Reduce the spacing between the crest line 7 of wavy belt body 3 more, then improve the catch rate of PM more, still, on the other hand,, the situation of the stifled full filter 20 of PM can take place then if the spacing of crest line 7 is too little.
Thereby, in this waste gas purification apparatus,, take following method relatively to produce effect in order to obtain high catch rate, that is, it is less that wavy belt body 3 is made into spacing, and it is big to be involved in a part of spacing.Do not burn and be deposited under the situation of filter even passed through long-time PM in the process of moving, the part that spacing is big is not stopped up, so the output of engine can descend, and does not travel but do not influence.Spacing at the crest line 7 of the wavy belt body 3 of filter 20, the filter wall that the big mode of spacing downstream side forms if the spacing that alternately makes up the little mode of downstream side forms so that upstream side is big filter wall and survey with the upper reaches is little, then can correctly adjust the mobile quantity that is a part of waste gas G by filter wall of waste gas G, thereby can adjust the PM catch rate.Further, the wavy belt body 3 preferably concavo-convex height H of ripple plate of crest line 7 and groove 6 is 0.5mm～5mm, if height H is below 0.5mm, then exhaust steam passage 5 is too low, thereby the tendency that has obstructions such as PM, in addition, if height H is more than 5mm, then exhaust steam passage 5 is too high, thereby waste gas G becomes insufficient with contacting of catalyst.Filter 20 is by distance P between the adjustment crest line 7 and the concavo-convex height H between crest line 7 and the groove 6, can regulate the size of crooked route 16 or parallel path 17, and can regulate flowing of waste gas G, as long as determine these sizes corresponding to the size and the performance of engine.
And, as shown in figure 11, under the environment of having given excessive external force such as vibration, perhaps under the environment that is subjected to big thermal stress, use when having the filter 20 of carrier 1, for prevent to disperse, distortion, each other can enough nickel with constituting the wavy belt body 3 of filter 20 and tabular belt body 13 or wavy belt body 3, solder such as copper engages.Under the situation of using filter 20 under the high temperature more than 600 ℃, preferably the belt body 8 that engages wavy belt body 3 and/or person's tabular belt body 13 with solder suppresses the thermal deformation of the belt body 8 of filter 20 each other.For example, a side end face 25 of filter 20 or two end faces 25 are engaged on closing line 23 (being generically and collectively referred to as 23) by solder.Specifically, shown in Figure 11 A or 11B, soldering portion becomes wire closing line 23A, the 23B at the intermittence (intermittent) that has preset width and extend with the radiation curve-like, perhaps shown in Figure 11 C, soldering portion becomes and has width that enlarges to outer circumferential side and the closing line 23C that extends with the radiation curve-like.In Figure 11 A, in order to make the adhesion equalization that applies to belt body 8 end faces, with past more outer circumferential side then closing line 23A more multimode constitute, promptly, at outermost perimembranous joint 12 closing line 23A are arranged, engaging at pars intermedia has 8 closing line 23A, and engaging in interior perimembranous has 4 closing line 23A.In Figure 11 B, constitute in the mode of not having on the closing line 23 that unnecessary external force is applied to solder, that is, engage by on closing line 23B, forming notch 24.Further, in Figure 11 C, in order to make the adhesion equalization that applies to the end face of belt body 8 by closing line 23, with past more outer circumferential side then the thickness of closing line 23C be that the big more mode of width forms.Further, in filter 20, when reeling wavy belt body 3, the crest line 7 and belt body 8 contacted the giving on the position of deciding the zone of overlapping wavy belt body 3, coating solder or set the solder paper tinsel, the phase soldering is together each other thereby make belt body 8.Further, constituting between the adjacent belt body 8 of filter 20, belt body 8 each other soldering give decide the zone the position preferably column 4 axially on dislocation.
Usually, in the amplifier case that uses metal forming, on one side pricker paper tinsel or metal forming are wound up in the metal forming, applying solder paste carries out soldering on one side, but the filter 20 that is made of carrier 1 of the present invention can obtain the strong intensity of thermal stress by two end faces 25 of a cylindrical shell of soldering column 4, wherein, this carrier 1 has used wire netting or metal nonwoven.Wire netting or metal nonwoven if be conceived to metal wire, then have flexible nature on all directions, even therefore the junction surface only is set in two ends, also is not vulnerable to mechanical stress, thermal stress, thereby can obtains the filter 20 of sufficient intensity.Promptly, though carrier 1 is subjected to low temperature and action of high temperature often repeatedly, further, Temperature Distribution is also different because of the position of carrier 1, but filter 20 is made by wire netting or metal nonwoven, and be made of very thin metal wire, therefore plastic deformation etc. can not take place in the distortion that therefore can stop heat distribution very neatly and caused.Thereby,,, can bring into play the excellent specific property of carrier by disperseing the junction surface even in soldered joint.Under the situation of the end face 25 that welds filter 20, if closing line 23 is extended to the radiation curve-like that passes carrier cylindrical shell central shaft, then carrier improves the rigidity of this soldering part, therefore radiate curvilinear braze welding joint at this and suffer restraints, thereby flexibility reduces.Therefore, under the situation of the closing line 23 that extends with the radiation curve-like, by extending with curve-likes such as whirlpool shapes, can weaken resistivity for external pressure, in the case, not at the joint everywhere of closing line 23, and notch 24 is set, thereby can obtain higher flexibility.And, by increasing the area of closing line 23, improve the intensity of filter 20.Filter 20 common pressure difference before and after it, the therefore power of being stipulated with catalyst.Because of the power carrier 1 suffered shearing force of this regulation is directly proportional with radius, it is strong more to arrive peripheral part one side more, therefore carries out under the situation of soldering at the end face 25 to filter 20, and it is big more that carrier 1 preferably makes bonding area arrive periphery more.And, there are the crest line 7 of the axioversion of the column 4 after finishing relatively in the wire netting of wavy belt body 3 or metal nonwoven, so for coating solder when having reeled belt body 8 or folder solder paper tinsel, and make solder or solder paper tinsel be positioned at the contacted each other zone of belt body 8.Yet therefore variations of the time being everlasting of the contacted each other zone of belt body 8 in order effectively to bring into play the effect of solder, preferably read zigzag crest line 7 with image, when having reeled belt body 8, makes solder correctly be positioned at the zone that belt body 8 contacts with each other.
As Figure 12～shown in Figure 15, the column 4 that a plurality of (among the figure being 3) constitutes carrier 1 is provided in the shell 2, for example, is provided in the way of blast pipe, and the end of housing 2 can be connected with blast pipe, perhaps housing 2 can be provided in the blast pipe in the mode that is pressed into.If the crest line 7 that will be formed in the wavy belt body 3 on the carrier 1 forms in the mode that the axle that is parallel to column 4 extends, then the exhaust steam passage 5 that forms along the groove 6 of wavy belt body 3 forms the exhaust steam passage 5 (Figure 12, Figure 13) of rectilinear parallel path 17.Perhaps, if the crest line 7 that will be formed in wavy belt body 3 forms in the mode that the axle for column 4 tilts, then the exhaust steam passage 5 that forms along the groove 6 of wavy belt body 3 forms the crooked route 16 of inclination.Further, if the crest line 7 that will be formed in wavy belt body 3 forms in the jagged mode of axle for column 4, then the exhaust steam passage 5 that forms along the groove 6 of wavy belt body 3 forms crooked route 16 (Figure 14, Figure 15).
Figure 12 shows, the example of the filter 20A that is made of the carrier 1 that is provided in the blast pipe.Filter 20A is built in the blast pipe in the mode on the flow direction that is provided in waste gas G.Carrier 20A is made of housing 2 and 3 columns 4 that are provided in the housing 2.The gas passage 5 of carrier 20A connects flow export 10 to another end face from the inflow entrance 9 of an end face, thereby forms linear gas passage 14.And in carrier 1,3 columns 4 are fixed on the housing 2, therefore by be positioned at housing 2 on block parts 11 are deposited to housing 2 on the end face of column 4 of downstream side, column 4 can be fixed in the housing 2.Though not shown, in this waste gas purification apparatus, certainly 1 carrier 1 is provided in the housing 2.And Figure 13 shows another example of the filter 20B that is made of the carrier 1 that is provided in blast pipe.Filter 20B is built in the blast pipe in the mode on the flow direction that is provided in waste gas G.Filter 20B is made of housing 2 and 3 columns 4 that are provided in the housing 2.The gas passage 5 of carrier 20B connects flow export 10 to another end face from the inflow entrance 9 of an end face, thereby forms linear gas passage 14.In this waste gas purification apparatus, 3 columns 4 are fixed on the housing 2, therefore as shown in figure 17, the outer peripheral face of the housing 2 that distortion column 4 is positioned at and form recess 12, thus column 4 can be fixed at housing 2.
And Figure 14 shows, other another example of the filter 20C that is made of the carrier 1 that is provided in the blast pipe.Filter 20C is built in the blast pipe in the mode on the flow direction that is provided in waste gas G.Filter 20C is made of housing 2 and 3 columns 4 that are provided in the housing 2.The gas passage 5 of filter 20C connects flow export 10 to another end face from the inflow entrance 9 of an end face, thereby forms jagged gas passage 15.In this carrier for exhaust-gas purification, for 3 columns 4 are fixed on the housing 2, and be positioned at housing 2 on block parts 11 are deposited to housing 2 on the end face of column 4 of downstream side, thereby column 4 can be fixed in the housing 2.And Figure 15 shows another example of the filter 20D that is made of the carrier 1 that is provided in the blast pipe.Filter 20D is built in the blast pipe in the mode on the flow direction that is provided in waste gas G.Filter 20D is made of housing 2 and 3 columns 4 that are provided in the housing 2.The gas passage 5 of filter 20D connects flow export 10 to another end face from the inflow entrance 9 of an end face, thereby forms jagged gas passage 15.In this carrier for exhaust-gas purification, for 3 columns 4 are fixed on the housing 2, and the outer peripheral face distortion that makes the housing 2 that column 4 is positioned to be forming recess 19, thereby column 4 can be fixed on the housing 2.Further, about filter 20A, 20B, 20C, the 20D that constitutes by carrier 1, though it is not shown, but, for make wavy belt body 3 and tabular belt body 13 column 4 axially on mutual dislocation does not take place, for example can realize simply, promptly by following method, under the state in column 4 is built in housing 2, make metal wire on the cross-sectional direction of housing 2 with cross shape across the both ends of the column 4 i.e. inflow entrance 9 of an end face and the flow export 10 of another end face.
And, as Figure 17 or shown in Figure 180, on width, be formed with jog 19, and the mode that is wound into column 4 with the wavy belt body 3 of belt body 8 forms under the state of filter 1, jog 19 mutual stacked and wavy belt bodies 3 are engaged mutually, thus belt body 8 with column 4 axially on wavy belt body 3 mode that mutual dislocation does not take place constitute.In Figure 17, in the axial direction, the central portion that constitutes the wavy belt body 3 of column 4 is configured as jog 19, and this jog 19 is recessed into the shape of plate-like by a pair of end difference 21.And in Figure 18, in the axial direction, the central portion that constitutes the wavy belt body 3 of column 4 is configured as jog 19, the shape that the wedge portion (cuneus) 22 that this jog 19 is highlighted is recessed into.Promptly, to filter 1 as column 4, if apply axial power such as vibration, thermal stress, external force, then stacked wavy belt body 3 might produce dislocation in the axial direction, but by mutual stacked jog 19, jog 19 plays the function of stopping device between wavy belt body 3, thereby can prevent that wavy belt body 3 from producing dislocation in the axial direction.Under the situation of the jog 19 that has been shaped on the wavy belt body 3, when the wavy belt body 3 that will have jog 19 is wound into column 4, need on the borderline region of jog 19, be shaped in the mode that does not crush the mobile crooked route 16 of waste gas G.
Figure 19 shows, and will use the reduction rate of CO and HC among the waste gas G of carrier for exhaust-gas purification of the present invention (the present invention) and use the result of the test that the reduction rate of CO and HC compares among the waste gas G of existing product.In Figure 19, transverse axis is a catalyst temperature ℃, and the longitudinal axis is the reduction rate % of harmful substance.That to be catalyst temperature cut down in 150 ℃ to 250 ℃ the low-temperature region harmful substance of product of the present invention is very effective at EGT for the reduction rate of catalyst temperature, insufficient but existing product is cut down in low-temperature region.Thus, can know the efficient height of removing harmful substance of product of the present invention in low-temperature region, be removed thereby harmful substance is carried out redox reaction.
For following purifying rate is tested, promptly at carrier 1 relatively more of the present invention with support the purifying rate of the harmful substance under the situation of carrier of existing metal beehive of platinum, for the purifying rate of SV (l/h), for example, the experimental rig that is produced as follows (not shown).In housing, be provided with respectively and support NO
XCarrier of the present invention of reducing catalyst (200 meshes) and existing metal beehive carrier (300 meshes), and NO is set respectively at the entrance side and the outlet side of housing
XConcentration sensor, and set the supply nozzle of reduction with fuel (light oil) at the entrance side of housing.The zone that is used for mix waste gas and fuel entrance side being provided with of housing.The capacity of waste gas is that the temperature of 8000cc and waste gas is 400 ℃, and the diameter of carrier is 240mm, and will reduce with light oil for NO
XThe quantity delivered ratio of exhaust mass is set at 2 times.The result who uses this experimental rig that carrier of the present invention and existing carrier are tested is as Figure 20 and shown in Figure 21.Figure 20 shows the curve map of the purifying property of the hydrocarbon (HC) when the existing metal beehive shape carrier of relatively carrier 1 of the present invention and supported platinum catalyst, promptly show the curve map of comparison for the result of the test of the HC purifying rate of SV (l/h), therefrom can know: even carrier of the present invention 1 is also being kept high-caliber HC purifying rate under 60000SV, and in carrier 1, do not stop up, and the not only purifying rate decline of existing carrier, and in carrier 1, stop up.And Figure 21 shows the NO when the existing metal beehive shape carrier of relatively carrier 1 of the present invention and supported platinum catalyst
XThe curve map of purifying property, promptly show the NO of comparison for SV (l/h)
XThe curve map of the result of the test of purifying rate therefrom can be known: even carrier of the present invention 1 is also being kept high-caliber NO under 60000SV
XPurifying rate, and in carrier 1, do not stop up, and the not only purifying rate decline of existing carrier, and in carrier 1, stop up.
Next, the carrier for exhaust-gas purification to built-in this waste gas purification apparatus describes.Waste gas purification apparatus is primarily characterized in that, the filter 20 that making is made of carrier 1, the crooked route 5 of being made a plurality of waste gas G contacts and being passed through by bent groove 6 between stacked metal tape 3, wherein, the wire netting 3 that this carrier 1 will have a groove is wound into helical form and is shaped.Specifically, as shown in Figure 5, filter 20 mainly forms by the column 4 that is wound into toroidal by the tabular wire netting 3 of ripple successively, and this wire netting 3 is made of at crooked crest line 7 that extends and the groove 6 between the crest line 7 on the width a plurality of.On the surface of the wire netting of the formation metal tape 3 of this waste gas purification apparatus, support and be useful on the oxidation catalyst that the particle matter 8 that is included among the waste gas G is burnt in oxidation, wherein, this metal tape 3 forms columns 4.As Figure 12～Figure 15, Figure 17 and shown in Figure 180, filter 20 forms by set one or more (among the figure being 3) columns 4 in housing 2.Filter 20 is provided in the way of blast pipe, and can set this filter 20 by following method, and the end that is about to housing 2 is connected with blast pipe, perhaps housing 2 is pressed in the blast pipe.From the inflow entrance 9 of an end face of column 4 flow export 10 to another end face, stacked be to be communicated with between the adjacent metal net 3 to be formed with a plurality of exhaust steam passages 5, this exhaust steam passage 5 is along the passage of groove 6 by waste gas G.
Compare test for the reduction rate of the PM among the waste gas G of this waste gas purification apparatus (product of the present invention) and the PM reduction rate of existing product.The existing product that is used to test is a kind of metallic filter, is that a kind of delivery temperature by engine is controlled the model of regenerating.Figure 22 shows product of the present invention and the result of the test of existing product under the ETC pattern.In Figure 22, PM reduction rate (%) is represented in the left side of the longitudinal axis, and the right side represents that the representative inlet in the test of filter presses (KPa), and transverse axis is represented test number (TN) (n).Once test (test) is the operating range with the about 30Km of the speed of a motor vehicle.Block curve is represented PM reduction rate (%), and A is a product of the present invention, and B is an existing product.And dashed curve represents that the representative inlet in the test of filter presses (KPa), and C is a product of the present invention, and D is an existing product.Can know that from Figure 22 the PM reduction rate for test number (TN) of product of the present invention remains 45%, but existing product descends along with the increase of test number (TN) but.And, also can not descend even product of the present invention has increased the inlet pressure of test number (TN) filter, and existing product is if increase test number (TN), then the inlet drops of filter.Thus, the phenomenon of plugged filter does not take place to cause because of PM in product of the present invention, and PM is burnt in oxidation successfully.
Figure 24 is the curve map about the melting loss test of the filter of this waste gas purification apparatus, this melting loss test is to be illustrated in the test that has or not under the inlet temperature for the melting loss of PM catch rate, this inlet temperature is meant, closes the temperature under the situation of accelerator when the hypothesis igniting.Usually, if utilize catalyst, then particle matter (below be called PM) takes fire about 300 ℃.Yet, travel under the situation in urban district etc., the EGT of automobile reach 300 ℃ situation seldom, thereby, the trend that exists the PM seizure amount (deposition) of filter to increase.When automobile when running at a low speed, PM is deposited in the filter, still, when EGT rose to more than 300 ℃ after run at high speed, the PM that is deposited took fire, if PM takes fire, then added its heat release, thereby PM moment burning sometimes.At this moment, caloric value is inevitable proportional with the PM deposition.Thereby even require the many again carriers that also can not melt of PM that captured as carrier, this carrier is good carrier.Figure 24 shows following investigation result, that is, make filter catch PM at low temperatures, and this filter is imported high-temperature gas suddenly, and whether the investigation filter is subjected to melting loss.Can know that though filter of the present invention 20 is made of carrier 1, this carrier 1 is made of wire netting or metal nonwoven, compare to have the durability more than 3 times with existing cordierite (cordierite) amplifier case.Figure 24 shows the melting loss boundary when filter is blown into 600 ℃ of high-temperature gases, ● the situation of the no melting loss of expression product of the present invention, the seizure amount (8g/ liter) of the no melting loss boundary of * expression cordierite honeycomb filter, △ represents the seizure amount (12g/ liter) of boundary of the no melting loss of carborundum amplifier case.That is, show the present invention and do not have the seizure amount of the boundary of melting loss (28g/ liter).In addition, ■ represents the maximum seizure amount (28g/ liter) of the generation melting loss when product of the present invention is blown into 700 ℃ of high-temperature gases.And the filter of actual vehicle is the 25g/ liter to the maximum seizure amount of PM.Thereby, can know that the filter of making by the carrier 1 that is made of wire netting or metal nonwoven 20 of the present invention melting loss does not take place and has excellent durability.
Usually, filter is subjected to low temperature and high temperature often repeatedly, and Temperature Distribution is also different because of the position of filter.Filter 20 of the present invention is made of the carrier of making of wire netting or metal nonwoven 1, and wire netting or metal nonwoven are made of very thin metal wire, therefore can stop the distortion of promptly following the trail of heat distribution and being caused very neatly, therefore local plastic deformation etc. can not take place, its result, be coated in lip-deep pottery etc. obscission can not take place, therefore have excellent durability.
Claims (35)
1. carrier for exhaust-gas purification is characterized in that having:
Carrier, it is used for catalyst-loaded, and this catalyst is removed the NO that is included in the waste gas by burning or redox reaction
X, HC, particle matter and coal smoke harmful substance, thereby purify described waste gas;
Tubular shell, it is used to deposit described carrier, wherein,
Described carrier is made of the column of belt body being reeled or be laminated into tubular, described belt body is made of wire netting or metal nonwoven, and has a wavy belt body that is configured as many crest lines and many grooves at least, the axle of the described relatively column of described crest line extends with parallel rectilinear form or tilted shape, described groove is between described crest line, and, an end face that is formed with between described belt body along described groove from described column is communicated to the exhaust steam passage of another end face, so that the described waste gas that flows through described exhaust steam passage because of the convex-concave surface of described belt body turbulent flow takes place.
2. carrier for exhaust-gas purification according to claim 1, it is characterized in that, described belt body is adapted to described wavy belt body and overlaps each other, and it is alternately overlapping perhaps to be adapted to described wavy belt body and tabular belt body, and described tabular belt body is between described wavy belt body.
3. carrier for exhaust-gas purification according to claim 2 is characterized in that, the axle of the described relatively column of described crest line of described wavy belt body tilts with zigzag and extends, and makes described exhaust steam passage form crooked route with this.
4. carrier for exhaust-gas purification according to claim 3 is characterized in that, under described wavy belt body overlapped each other situation about setting, the described crooked route that is formed by the described crest line of described wavy belt body intersected respectively.
5. carrier for exhaust-gas purification according to claim 2, it is characterized in that, described carrier is made of the column of overlapping belt body being reeled or be laminated into tubular, this overlapping belt body is meant, described wavy belt body and described tabular belt body are overlapped as one, and perhaps that the angle of inclination of the described crest line more than 2 is identical or different described wavy belt bodies carries out overlapping belt body as a cover each other.
6. carrier for exhaust-gas purification according to claim 1 is characterized in that, constitute the described wire netting of described belt body or described metal nonwoven by stainless steel or Aludirome constitute.
7. carrier for exhaust-gas purification according to claim 1 is characterized in that, equitant described belt body is engaged by solder each other, and this solder is pricker or pricker paper tinsel.
8. carrier for exhaust-gas purification according to claim 7, it is characterized in that, at least one side end face of described carrier is engaged by described solder, soldering portion forms the wire at the intermittence that has predetermined width and extend with the radiation curve-like, perhaps forms the wire that width broadens and extends with the radiation curve-like at outer circumferential side.
9. carrier for exhaust-gas purification according to claim 7, it is characterized in that, when having reeled described wavy belt body, on the position of the presumptive area on the adjacent described belt body of described crest line, the described belt body of described column each other by described solder brazing together at least.
10. carrier for exhaust-gas purification according to claim 9 is characterized in that, on adjacent described belt body, described belt body each other the described presumptive area of soldering the position described column axially on dislocation mutually.
11. carrier for exhaust-gas purification according to claim 3 is characterized in that, the angle that the axle inclination of the described relatively column of described crest line of described wavy belt body is 10 °～50 °, and also described exhaust steam passage forms described crooked route.
12. carrier for exhaust-gas purification according to claim 3, it is characterized in that, in 0 °～50 ° angular range, the gradient more than 2 kinds is adopted in the combination of the described crest line of described wavy belt body in the described zigzag gradient of the axle of described relatively column.
13. carrier for exhaust-gas purification according to claim 11, it is characterized in that, a plurality of described column series connection are provided in the described tubular shell, and the angle of inclination of the described crest line of the described wavy belt body of described column is identical with downstream side or different at the upstream side of described waste gas.
14. carrier for exhaust-gas purification according to claim 1 is characterized in that, the linear diameter that constitutes the metal wire of described wire netting is 0.03mm～0.35mm.
15. carrier for exhaust-gas purification according to claim 1 is characterized in that, the mesh of described wire netting is 16～200.
16. carrier for exhaust-gas purification according to claim 15, it is characterized in that, the mesh of described wire netting at the mesh number on the ordinate of metal mesh belt more than the mesh number on the horizontal line at described metal mesh belt, described mesh number on the described ordinate of described metal mesh belt is set at 30～100, and the described mesh number on described horizontal line is set at 60～200.
17. carrier for exhaust-gas purification according to claim 1 is characterized in that, the wavy concavo-convex spacing of described wavy belt body is 1mm～6mm.
18. carrier for exhaust-gas purification according to claim 1 is characterized in that, the wavy concavo-convex height of described wavy belt body is 0.5mm～5mm.
19. carrier for exhaust-gas purification according to claim 1 is characterized in that, is coated with the pottery more than at least a in aluminium oxide, silica, zirconia, the cerium oxide on the wire surface of the described belt body that constitutes described carrier.
20. carrier for exhaust-gas purification according to claim 19 is characterized in that, supports one or more catalyst in platinum, silver, potassium, palladium, iridium, iron, copper, the barium on the surface of described overlay.
21. carrier for exhaust-gas purification according to claim 1, it is characterized in that, when described waste gas when being formed on the described exhaust steam passage between the described belt body along described groove, when being included in described harmful substance in the described waste gas and contacting with described belt body with the state flow mistake of turbulent flow, and under the effect of described supported catalyst, carry out redox reaction supporting, be removed with this.
22. carrier for exhaust-gas purification according to claim 1 is characterized in that, being supported on described supported catalyst is the NO that oxidation catalyst, three-way catalyst, hydrocarbon class A fuel A, ammonia or urea are played a role as reducing agent
XReducing catalyst.
23. carrier for exhaust-gas purification according to claim 1, it is characterized in that, be applicable to waste gas purification apparatus, this waste gas purification apparatus has set the filter that is built-in with described carrier in the exhaust passage of discharging described waste gas, make described waste gas by described filter, so that described belt body is caught described harmful substance, and make described harmful substance contact by described belt body, with described harmful substance is burnt, redox reaction, thereby described harmful substance is removed, purify described waste gas with this.
24. carrier for exhaust-gas purification according to claim 23, it is characterized in that, described belt body is adapted to described wavy belt body and overlaps each other, and it is alternately overlapping perhaps to be adapted to described wavy belt body and tabular belt body, and described tabular belt body is between described wavy belt body.
25. carrier for exhaust-gas purification according to claim 24 is characterized in that,
Described belt body is formed with jog on width, described belt body is being reeled or be laminated under the state of described column, mutually stacked described jog makes described belt body engaging mutually so that the flow direction of the waste gas of described belt body described column axially on do not misplace mutually.
26. carrier for exhaust-gas purification according to claim 23, it is characterized in that, described wavy belt body is configured as following shape, promptly, the shape that the axle of described relatively column only alternately repeatedly forms at the described crest line that has gradient on the specific length and the described crest line that only extends in parallel on specific length, and constitute by parallel path and crooked route along the described exhaust steam passage that the described groove of described wavy band forms.
27. carrier for exhaust-gas purification according to claim 23, it is characterized in that, described filter is made of the described column of overlapping belt body being reeled or be laminated into tubular, described overlapping belt body is meant, described wavy belt body and described tabular belt body are overlapped as one, and perhaps that the angle of inclination of the described crest line more than 2 is identical or different described wavy belt bodies carries out overlapping belt body as a cover each other.
28. carrier for exhaust-gas purification according to claim 23, it is characterized in that, at least one side end face of described filter is engaged by solder, soldering portion forms the wire at the intermittence that has predetermined width and extend with the radiation curve-like, and perhaps the degree of soldering portion is wide broadens and extend with the radiation curve-like at outer circumferential side.
29. carrier for exhaust-gas purification according to claim 23 is characterized in that, described filter constitutes in a plurality of described columns mode that sets of connecting on the flow direction of described waste gas.
30. carrier for exhaust-gas purification according to claim 23 is characterized in that, the angle of inclination of the described crest line of described wavy belt body is little and big at downstream side at the upstream side of described waste gas.
31. carrier for exhaust-gas purification according to claim 23, it is characterized in that, will at least 3 described belt bodies be configured as under the situation of described wavy belt body as a cover, the thin and thick mode of the mesh outside sets with the mesh of inboard with described belt body, constitutes described filter with this.
32. carrier for exhaust-gas purification according to claim 23, it is characterized in that, at least 3 described belt bodies are being configured as under the situation of described wavy belt body as a cover, described belt body with little at the linear diameter of inboard metal wire and mesh thin and big and mode that mesh is thick sets at the linear diameter of the described metal wire in the outside, is constituted described filter with this.
33. carrier for exhaust-gas purification according to claim 29, it is characterized in that, replace overlapping described spacing from the upper reaches of waste gas stream more the upper reaches to the dirty described wavy belt body that just becomes more little and described spacing from waste gas stream constitute described filter more to the dirty described wavy belt body that just becomes big more with this.
34. carrier for exhaust-gas purification according to claim 23, it is characterized in that, when described waste gas when being formed on the described crooked route between the described belt body, the described particle matter that is contained in the described waste gas flows through contacting simultaneously with the described wire netting of described belt body or metal nonwoven, perhaps contact for the time being is detained in described crooked route, thus oxidized burning.
35. carrier for exhaust-gas purification according to claim 23, it is characterized in that, when described waste gas passes through the described crooked route of described exhaust steam passage, process along with the time, catch described particle matter in described crooked route and supporting and carry out oxidation reaction and be removed under the effect of described supported catalyst, described exhaust steam passage is formed between the described belt body by the described groove of described wavy belt body.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007121435 | 2007-05-02 | ||
| JP2007-121435 | 2007-05-02 | ||
| JP2007132545 | 2007-05-18 | ||
| JP2007-132545 | 2007-05-18 | ||
| JP2008000418A JP5015017B2 (en) | 2007-05-18 | 2008-01-07 | Support structure for exhaust gas purification catalyst |
| JP2008000467A JP5242175B2 (en) | 2007-05-02 | 2008-01-07 | Exhaust gas purification device |
| JP2008-000418 | 2008-01-07 | ||
| JP2008-000467 | 2008-01-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101298057A true CN101298057A (en) | 2008-11-05 |
| CN101298057B CN101298057B (en) | 2013-01-09 |
Family
ID=42105487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100928467A Expired - Fee Related CN101298057B (en) | 2007-05-02 | 2008-05-04 | Carrier for exhaust-gas purification |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101298057B (en) |
| DE (1) | DE602008000937D1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103742232A (en) * | 2014-01-22 | 2014-04-23 | 无锡威孚力达催化净化器有限责任公司 | Wire mesh type diesel exhaust particulate filter and production method thereof |
| CN103861612A (en) * | 2012-12-14 | 2014-06-18 | 上海郎特汽车净化器有限公司 | Catalyst used for diesel engine tail gas soot collection catalysis |
| US9689354B1 (en) | 2016-01-19 | 2017-06-27 | Ford Global Technologies, Llc | Engine exhaust gas recirculation system with at least one exhaust recirculation treatment device |
| CN108603431A (en) * | 2016-02-04 | 2018-09-28 | 阿莫绿色技术有限公司 | Large capacity hydrogen-catalyst reactor catalyst carrier module |
| CN109248713A (en) * | 2018-09-06 | 2019-01-22 | 南京蔚岚环境技术研究院有限公司 | A kind of catalyst carrier and its manufacturing method of TREATMENT OF VOCs |
| CN110141959A (en) * | 2019-05-08 | 2019-08-20 | 陕西航天西诺美灵电气有限公司 | A kind of emergency carbon dioxide removal device and method |
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| CN112566720A (en) * | 2018-08-10 | 2021-03-26 | 本田技研工业株式会社 | Catalytic device |
| CN113275008A (en) * | 2021-05-27 | 2021-08-20 | 北京化工大学 | CO-SCR denitration catalyst and preparation method and application thereof |
| CN113316484A (en) * | 2019-01-15 | 2021-08-27 | 日立造船株式会社 | Catalyst for exhaust gas purification |
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| JP3265737B2 (en) * | 1993-08-20 | 2002-03-18 | 住友電気工業株式会社 | High corrosion resistant metal filter |
| JP3434117B2 (en) * | 1996-03-29 | 2003-08-04 | 住友電気工業株式会社 | Particulate trap for diesel engine |
| CN2523961Y (en) * | 2002-01-30 | 2002-12-04 | 山西利民机械有限责任公司 | Beehive metal carrier |
-
2008
- 2008-05-01 DE DE602008000937T patent/DE602008000937D1/en active Active
- 2008-05-04 CN CN2008100928467A patent/CN101298057B/en not_active Expired - Fee Related
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| CN103861612A (en) * | 2012-12-14 | 2014-06-18 | 上海郎特汽车净化器有限公司 | Catalyst used for diesel engine tail gas soot collection catalysis |
| CN103742232A (en) * | 2014-01-22 | 2014-04-23 | 无锡威孚力达催化净化器有限责任公司 | Wire mesh type diesel exhaust particulate filter and production method thereof |
| CN113559616A (en) * | 2014-10-30 | 2021-10-29 | 富士滤机工业株式会社 | Hollow cylindrical filter and manufacturing device |
| CN113559616B (en) * | 2014-10-30 | 2023-03-28 | 富士滤机工业株式会社 | Hollow cylindrical filter and manufacturing device |
| US9689354B1 (en) | 2016-01-19 | 2017-06-27 | Ford Global Technologies, Llc | Engine exhaust gas recirculation system with at least one exhaust recirculation treatment device |
| CN108603431A (en) * | 2016-02-04 | 2018-09-28 | 阿莫绿色技术有限公司 | Large capacity hydrogen-catalyst reactor catalyst carrier module |
| CN108603431B (en) * | 2016-02-04 | 2021-05-07 | 阿莫绿色技术有限公司 | Catalyst carrier module for large-capacity catalyst reactor |
| CN112566720A (en) * | 2018-08-10 | 2021-03-26 | 本田技研工业株式会社 | Catalytic device |
| CN109248713A (en) * | 2018-09-06 | 2019-01-22 | 南京蔚岚环境技术研究院有限公司 | A kind of catalyst carrier and its manufacturing method of TREATMENT OF VOCs |
| CN113316484A (en) * | 2019-01-15 | 2021-08-27 | 日立造船株式会社 | Catalyst for exhaust gas purification |
| CN110141959A (en) * | 2019-05-08 | 2019-08-20 | 陕西航天西诺美灵电气有限公司 | A kind of emergency carbon dioxide removal device and method |
| CN110507068A (en) * | 2019-08-28 | 2019-11-29 | 杭州勤立机械有限公司 | A kind of Portable field kettle based on solar energy |
| CN113275008A (en) * | 2021-05-27 | 2021-08-20 | 北京化工大学 | CO-SCR denitration catalyst and preparation method and application thereof |
| CN113275008B (en) * | 2021-05-27 | 2023-08-29 | 北京化工大学 | CO-SCR denitration catalyst and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101298057B (en) | 2013-01-09 |
| DE602008000937D1 (en) | 2010-05-20 |
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