DE19921609A1 - Honeycomb body arrangement with different sections in a casing tube - Google Patents
Honeycomb body arrangement with different sections in a casing tubeInfo
- Publication number
- DE19921609A1 DE19921609A1 DE19921609A DE19921609A DE19921609A1 DE 19921609 A1 DE19921609 A1 DE 19921609A1 DE 19921609 A DE19921609 A DE 19921609A DE 19921609 A DE19921609 A DE 19921609A DE 19921609 A1 DE19921609 A1 DE 19921609A1
- Authority
- DE
- Germany
- Prior art keywords
- honeycomb body
- section
- flow direction
- metal foil
- casing tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000002184 metal Substances 0.000 claims abstract description 33
- 239000011888 foil Substances 0.000 claims abstract description 30
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 13
- 230000003197 catalytic effect Effects 0.000 claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000013021 overheating Methods 0.000 abstract description 8
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 241000264877 Hippospongia communis Species 0.000 description 26
- 239000007789 gas Substances 0.000 description 23
- 239000003054 catalyst Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 239000011149 active material Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 241000143229 Idaea consanguinaria Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2046—Periodically cooling catalytic reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2889—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with heat exchangers in a single housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/44—Honeycomb supports characterised by their structural details made of stacks of sheets, plates or foils that are folded in S-form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Wabenkörperanordnung mit verschiedenen Abschnitten in einem Mantelrohr verwendbar zum katalytischen Reinigen von Abgas, insbesondere für Fahrzeuge mit Verbrennungsmotoren mit einer hohen Emissionsrate von Kohlenwasserstoffen.The present invention relates to a honeycomb structure different sections in a jacket pipe can be used for catalytic Cleaning exhaust gas, especially for vehicles with internal combustion engines a high emission rate of hydrocarbons.
In den letzten Jahren sind zahlreiche Ausführungsformen für Katalysatoren entwickelt worden. Eine Art von Katalysatoren weist zumindest teilweise mit katalytisch aktivem Material beschichtete Metallfolien auf, welche in einem Mantelrohr angeordnet sind. Für solche Katalysatoren sind zahlreiche Bauformen mit unterschiedlichen Strukturen der Metallfolien bekannt.There have been numerous embodiments for catalysts in recent years has been developed. One type of catalytic converter has at least partially catalytically active material coated metal foils, which in one Jacket tube are arranged. There are numerous designs for such catalysts known with different structures of the metal foils.
Durch die exotherme Reaktion im Katalysator kann leicht eine Überhitzung auftreten. Abhilfe bei diesem Problem liefert ein aus der DE 195 35 289 A1 bekannter Katalysator zur Reinigung des Abgases von Verbrennungsmotoren mit großen Anteilen an Kohlenwasserstoffen. Dieser Katalysator besteht aus einem Mantelrohr sowie höchstens zwei Lagen strukturierter Metallfolie mit einer katalytisch aktiven Beschichtung, die an der Innenoberfläche des Mantelrohres angebracht sind. Diese Anordnung ist zur Einhaltung gewisser Mindestanforderungen bei der Abgasreinigung, insbesondere von 2-Takt-Motoren älterer Bauart mit Kohlenwasserstoffkonzentrationen im Abgas von bis zu 4 Volumenprozent geeignet. Der Nachteil solcher Katalysatoren ist jedoch, daß nur eine teilweise Abgasreinigung erzielt werden kann. The exothermic reaction in the catalyst can easily cause overheating occur. A solution to this problem is provided by DE 195 35 289 A1 Known catalyst for cleaning the exhaust gas from internal combustion engines large proportions of hydrocarbons. This catalyst consists of one Jacket tube and at most two layers of structured metal foil with one catalytically active coating on the inner surface of the casing tube are attached. This arrangement is more certain for compliance Minimum requirements for exhaust gas cleaning, especially of 2-stroke engines Older design with hydrocarbon concentrations in the exhaust gas of up to 4 Volume percent suitable. The disadvantage of such catalysts, however, is that only partial exhaust gas purification can be achieved.
Zur Verbesserung der reinigenden Wirkung liegen Katalysatoren vor, z. B. aus der US 5,618,501 bekannt, die aus einem Mantelrohr bestehen, das abschnittsweise ganz mit zwei katalytisch aktiven Wabenkörpern gefüllt ist. Zur Reinigung des Abgases mit hohen Anteilen von Kohlenwasserstoffen kann diese Anordnung jedoch zu einer lokalen Überhitzung im anströmseitigen Bereich führen, die auch nicht vermieden werden kann, wenn im Wabenkörper ein kleiner zentraler Bereich der vom Abgas durchströmten Querschnittsfläche freigelassen wird. Eine solche Anordnung ist z. B. aus der EP 0 270 856 A1 bekannt.To improve the cleaning effect, there are catalysts, e.g. B. from the US 5,618,501 known, which consist of a jacket tube, the sections is completely filled with two catalytically active honeycomb bodies. To clean the Exhaust gas with high proportions of hydrocarbons can this arrangement however, lead to local overheating in the upstream area, which too cannot be avoided if there is a small central one in the honeycomb body Area of the cross-sectional area through which the exhaust gas flows is left free. A such an arrangement is e.g. B. from EP 0 270 856 A1.
Aufgabe der vorliegenden Erfindung ist die Schaffung einer Wabenkörperanordnung als Grundlage für einen Katalysator zur Reinigung von Abgasen mit hohen Kohlenwasserstoffkonzentrationen mit einer verbesserten Reinigungswirkung unter Vermeidung einer Überhitzung, insbesondere für zweirädrige Kraftfahrzeuge.The object of the present invention is to create a Honeycomb structure as a basis for a catalyst for cleaning Exhaust gases with high hydrocarbon concentrations with an improved Cleaning effect while avoiding overheating, especially for two-wheel motor vehicles.
Zur Lösung dieser Aufgabe dient ein Katalysator gemäß dem Anspruch 1. Vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben.A catalyst according to claim 1 is used to achieve this object. Advantageous refinements are specified in the dependent claims.
Untersuchungen haben gezeigt, daß es für eine katalytische Umsetzung eines großen Teils von Kohlenwasserstoffen in dem Abgas ausreicht, dieses durch ein Mantelrohr zu leiten, welches in der Nähe seiner Innenoberfläche zumindest teilweise mit katalytisch aktivem Material beschichtete Metallfolien aufweist, wobei der überwiegende Teil der Querschnittsfläche des Mantelrohres frei von solchen Metallfolien ist, so daß eine gute Wärmeabfuhr nach außen gewährleistet ist. Dies hat den Vorteil, daß ein auf diese Weise vorgereinigtes Abgas im folgenden durch weitere Abschnitte des Mantelrohres geleitet werden kann, die zumindest teilweise mit einem katalytisch aktiven Wabenkörper ausgefüllt sind, ohne daß eine Überhitzung auftritt, da auf Grund der Vorreinigung der Anteil an Kohlenwasserstoffen schon deutlich reduziert worden ist. Ein weiterer Vorteil der erfindungsgemäßen Wabenkörperanordnung besteht darin, daß ein im Abgaskanal durch eine Wabenkörperanordnung entstehender Gegendruck im Vergleich zu einer Wabenkörperanordnung, bei der auch der erste Abschnitt des Mantelrohres vollständig durch einen Wabenkörper ausgefüllt wird, verringert werden kann.Studies have shown that it is necessary for the catalytic conversion of a large part of hydrocarbons in the exhaust gas, this by a To conduct casing pipe, which at least in the vicinity of its inner surface has metal foils partially coated with catalytically active material, the major part of the cross-sectional area of the casing tube being free of such metal foils, so that good heat dissipation to the outside is guaranteed is. This has the advantage that a pre-cleaned exhaust gas in the following can be passed through further sections of the jacket tube, the are at least partially filled with a catalytically active honeycomb body, without overheating, since the proportion of Hydrocarbons have already been significantly reduced. Another advantage of Honeycomb body arrangement according to the invention consists in that in the exhaust duct back pressure created by a honeycomb body arrangement compared to a honeycomb body arrangement, in which the first section of the casing tube completely filled by a honeycomb body, can be reduced.
Zu einer befriedigenden Reinigung je nach verfolgtem Ziel kann es schon ausreichend sein, wenn das Metallrohr aus lediglich zwei axialen Abschnitten besteht, wovon der hintere in Durchströmungsrichtung von einem Wabenkörper ausgefüllt ist, der zur Vergrößerung der katalytisch aktiven Oberfläche viele Strömungskanälen aufweist. Diese Strömungskanäle sind bevorzugt aus vielen Lagen strukturierter Metallfolien gebildet. Ebenfalls ist es in vielen Fällen ausreichend in dem in Strömungsrichtung des Abgases ersten Abschnitt des Mantelrohres eine einzige, vorzugsweise zwei Lagen der Metallfolie mit katalytisch aktivem Material anzubringen.Depending on the goal pursued, it can already lead to a satisfactory cleaning be sufficient if the metal tube consists of only two axial sections consists of what the rear in the flow direction of a honeycomb body is filled in, many to enlarge the catalytically active surface Has flow channels. These flow channels are preferred from many Layers of structured metal foils formed. It is also so in many cases sufficient in the first section of the exhaust gas in the flow direction Jacket tube with a single, preferably two layers of metal foil attach catalytically active material.
Es erweist sich als vorteilhaft, wenn das Mantelrohr etwa jeweils zur Hälfte von dem in Strömungsrichtung der Abgase vorderen bzw. hinteren Abschnitt eingenommen wird. Auf diese Weise erreicht man, daß eine höhere Umsatzrate von Kohlenwasserstoffen erzielt werden kann als bei einer anderen Anordnung.It proves to be advantageous if the jacket tube is about half of each the front or rear section in the flow direction of the exhaust gases is taken. In this way you can achieve a higher turnover rate of hydrocarbons can be achieved than with another arrangement.
Der in Strömungsrichtung vordere und der hintere Abschnitt können direkt aneinander liegen, was die Fertigung vereinfacht. Es kann aber auch ein Abstand eingehalten werden, der bis etwa 10 mm betragen kann. Dies hat den Vorteil, daß eine erhöhte Verwirbelung und damit eine bessere Durchmischung der Abgase in dem entstehenden Zwischenraum erfolgt.The front and rear sections in the flow direction can be directly lie next to each other, which simplifies production. But it can also be a distance be observed, which can be up to about 10 mm. This has the advantage that increased turbulence and thus better mixing of the exhaust gases in the resulting space.
Die verwendete Metallfolie kann dabei zumindest in Teilbereichen strukturiert sein, insbesondere in Wellenform. Diese Strukturen können auch komplexer sein, z. B. Wellen mit Querrippen, Schlitzen, Mikrostrukturen oder andere Geometrien.The metal foil used can be structured at least in some areas be, especially in wave form. These structures can also be more complex e.g. B. waves with transverse ribs, slots, microstructures or other geometries.
Befestigt werden können die Metallfolien; die im vorderen Abschnitt in Strömungsrichtung im Mantelrohr angebracht sind, untereinander und/oder am Mantelrohr durch Löten. Es genügt, die Metallfolie in ihren axialen Endbereichen einzulöten. Das Befestigen durch Schweißen ist ebenfalls möglich, z. B. in Form von Punktschweißungen.The metal foils can be attached; those in the front section in Flow direction are attached in the casing tube, with each other and / or on Jacket tube by soldering. It is sufficient to have the metal foil in its axial end regions solder in. Fastening by welding is also possible, e.g. B. in the form of spot welds.
Zur Verbesserung der Umsetzung des Abgases durch Querströmungen und Verwirbelungen im vorderen Abschnitt in Durchströmungsrichtung des Mantelrohres ist es vorteilhaft, die Metallfolie mit Perforationslöchern zu versehen, die beispielsweise einen Durchmesser von 2-6 mm aufweisen können.To improve the implementation of the exhaust gas through cross flows and Turbulence in the front section in the flow direction of the It is advantageous to cover the metal foil with perforation holes provided, which can have a diameter of 2-6 mm, for example.
Für den Herstellungsprozeß, insbesondere die Lötung von Wabenkörpern ist es vorteilhaft, wenn der Wabenkörper durch elastische Kräfte in dem Mantelrohr fixiert ist und auch die einzelnen Blechlagen untereinander sich nicht mehr verschieben können. Daher ist es ein Vorteil, wenn der Wabenkörper aus mehreren Lagen untereinander verschlungener Bleche gebildet ist. Dabei können die Bleche verschieden strukturiert sein. Der Wabenkörper kann aus abwechselnd glatten und gewellten Blechen, die ineinander verschlungen sind, aufgebaut sein. Auch andere Geometrien sind möglich. Die Befestigung des Wabenkörpers im Mantelrohr erfolgt insbesondere durch die Verlötung der Enden der Bleche mit der Innenoberfläche des Mantelrohres.It is for the manufacturing process, especially the soldering of honeycomb bodies advantageous if the honeycomb body by elastic forces in the jacket tube is fixed and the individual sheet layers among themselves no longer can move. Therefore, it is an advantage if the honeycomb body is made of several layers of intertwined sheets is formed. You can the sheets are structured differently. The honeycomb body can alternate from smooth and corrugated sheets that are intertwined, built up. Other geometries are also possible. The attachment of the honeycomb body in the Jacket tube is made in particular by soldering the ends of the sheets the inner surface of the casing tube.
Untersuchungen haben gezeigt, daß sich der für den in Durchströmungsrichtung hinteren Abschnitt bestimmte Wabenkörper als effektiv in seiner Wirkung erweist, wenn er Strömungskanäle einer solchen Querschnittsfläche aufweist, daß sich 100 cpsi bis 400 cpsi, insbesondere etwa 200 cpsi (cells per square inch) ergeben.Studies have shown that the in the direction of flow rear section certain honeycomb body as effective in its effect proves if it has flow channels of such a cross-sectional area that 100 cpsi to 400 cpsi, in particular about 200 cpsi (cells per square inch) surrender.
Für eine gute Vorreinigung des Abgases durch den in Strömungsrichtung des Abgases vorderen Abschnitt des Mantelrohres, auch im Hinblick auf die Vermeidung einer Überhitzung des in Durchströmungsrichtung mit einem Wabenkörper ausgefüllten hinteren Abschnittes des Mantelrohres sowie zur Vermeidung einer Überhitzung an anderen Stellen des Mantelrohres, hat sich als vorteilhaft erwiesen, daß die im ersten Abschnitt des Mantelrohres angefügte strukturierte Metallfolie Strömungskanäle einer solchen Querschnittsfläche aufweist, so daß sich 20 cpsi bis 50 cpsi, vorzugsweise etwa 25 cpsi ergeben.For a good pre-cleaning of the exhaust gas in the direction of flow of the Exhaust gas front section of the casing, also with regard to Avoidance of overheating in the flow direction with a Honeycomb body filled rear section of the casing tube and Avoiding overheating at other points on the casing tube has proven to be proved to be advantageous that the attached in the first section of the jacket tube structured metal foil flow channels of such a cross-sectional area has, so that there are 20 cpsi to 50 cpsi, preferably about 25 cpsi.
Als Material für die im in Strömungsrichtung des Abgases vorderen Abschnitt des Mantelrohres angebrachte strukturierte Metallfolie kommen die üblichen hochtemperatur-korrosionsbeständigen Materialien in Betracht, insbesondere Materialien wie der Werkstoff 1.4767 oder Materialien mit ähnlichen Eigenschaften. Für den Wabenkörper im hinteren Abschnitt des Mantelrohres verwendet man vorzugsweise ein modifiziertes korrosionsbeständiges Material, insbesondere mit einer ähnlichen Zusammensetzung wie der Werkstoff 1.4757. Obwohl für metallische Wabenkörper sehr häufig austenitische Edelstähle beim Mantelrohr verwendet werden, ist es für die vorliegende Erfindung vorteilhaft, ferritischen korrosionsbeständigen Edelstahl, insbesondere mit den Werkstoffnummern 1.4509 oder 1.4512 zu verwenden.As a material for the front section of the exhaust gas in the flow direction Structured metal foil attached to the casing tube come the usual high temperature corrosion-resistant materials, in particular Materials such as 1.4767 or materials with similar ones Characteristics. For the honeycomb body in the rear section of the casing tube a modified corrosion-resistant material is preferably used, in particular with a similar composition to the material 1.4757. Although austenitic stainless steels are very common for metallic honeycombs Jacket tube are used, it is advantageous for the present invention, ferritic corrosion-resistant stainless steel, especially with the Material numbers 1.4509 or 1.4512 to be used.
Anführungsbeispiele der Erfindung, auf die diese jedoch nicht beschränkt ist, sind in der Zeichnung dargestellt. Es zeigenQuotation examples of the invention, to which, however, this is not limited shown in the drawing. Show it
Fig. 1 einen axialen Längsschnitt durch eine erfindungsgemäße Waben körperanordnung, Fig. 1 body assembly is an axial longitudinal section through a honeycomb,
Fig. 2 Stirnansicht einer erfindungsgemäßen Wabenkörperanordnung. Fig. 2 front view of a honeycomb body assembly according to the invention.
In Fig. 1 ist ein Längsschnitt durch eine Wabenkörperanordnung, die aus zwei Abschnitten 4, 5 besteht, welche von einem Mantelrohr 1 umgeben sind, dargestellt. Im in Strömrichtung S eines Abgases vorderen Abschnitt 4 ist eine mit katalytisch aktivem Material beschichtete Metallfolie 2 an der Innenoberfläche 9 des Mantelrohres 1 angebracht. Zur Steigerung der katalytischen Wirkung durch Verwirbelungen des Abgases können sich Perforationslöcher 8 in der Metallfolie 2 befinden. Die Metallfolie 2 ist an der Innenoberfläche 9 des Mantelrohres 1 vorzugsweise angelötet. Der in Strömungsrichtung S hintere Abschnitt 5 des Mantelrohres 1 ist von einem Wabenkörper 6, der aus verschiedenen strukturierten Metallfolien 3 aufgebaut sein kann, im wesentlichen vollständig ausgefüllt. Der vordere Abschnitt 4 des dargestellten katalytischen Konverters enthält vorzugsweise nur eine gewellte Lage der katalytisch aktiven Metallfolie 2, die es einerseits ermöglicht, einen großen Teil der im Abgas enthaltenen Kohlenwasserstoffe zu katalysieren und andererseits eine gute Wärmeabfuhr gewährleistet. Durch die Katalyse eines Teils der Kohlenwasserstoffe im vorderen Abschnitt des Mantelrohres 4 kann eine Überhitzung des Wabenkörpers 6 im hinteren Abschnitt 5 bei der weiteren Reinigung der Abgase vermieden werden.In Fig. 1, a longitudinal section through a honeycomb body arrangement is shown, which consists of two sections 4 , 5 , which are surrounded by a casing tube 1 . In the front section 4 in the flow direction S of an exhaust gas, a metal foil 2 coated with catalytically active material is attached to the inner surface 9 of the casing tube 1 . To increase the catalytic effect due to swirling of the exhaust gas, perforation holes 8 can be in the metal foil 2 . The metal foil 2 is preferably soldered to the inner surface 9 of the casing tube 1 . The rear section 5 of the casing tube 1 in the flow direction S is essentially completely filled by a honeycomb body 6 , which can be constructed from different structured metal foils 3 . The front section 4 of the catalytic converter shown preferably contains only one corrugated layer of the catalytically active metal foil 2 , which on the one hand makes it possible to catalyze a large part of the hydrocarbons contained in the exhaust gas and on the other hand ensures good heat dissipation. By catalysing some of the hydrocarbons in the front section of the casing tube 4 , overheating of the honeycomb body 6 in the rear section 5 can be avoided during further cleaning of the exhaust gases.
Fig. 2 zeigt die Aufsicht auf den Stirnbereich des Mantelrohres 1 des in Fig. 1 dargestellten erfindungsgemäßen Katalysators. Im vorderen Abschnitt 4 ist die an der Innenseite angebrachte gewellte katalytisch aktive Metallfolie 2 sichtbar. Im hinteren Abschnitt 5 ist der aus verschiedenen Lagen strukturierter Metallfolien 3 bestehende Wabenkörper 6, der aus S-förmigen Lagen zusammengesetzt ist, dargestellt. Auf diese Weise wird eine Vielzahl von Strömungskanälen 7 gebildet sowie das axiale Verschieben der Lagen gegeneinander erschwert. FIG. 2 shows a top view of the end region of the casing tube 1 of the catalyst according to the invention shown in FIG. 1. The corrugated catalytically active metal foil 2 attached to the inside is visible in the front section 4 . In the rear section 5 , the honeycomb body 6 consisting of different layers of structured metal foils 3 , which is composed of S-shaped layers, is shown. In this way, a plurality of flow channels 7 is formed and the axial displacement of the layers relative to each other is made more difficult.
Die vorliegende Erfindung eignet sich besonders für die Abgasreinigung bei Krafträdern, insbesondere mit einem Hubraum von weniger als 250 Kubikzentimetern. The present invention is particularly suitable for exhaust gas purification Motorcycles, in particular with a cylinder capacity of less than 250 Cubic centimeters.
11
Mantelrohr
Casing pipe
22nd
Metallfolie im vorderen Abschnitt
Metal foil in the front section
33rd
strukturierte Metallfolien im hinteren Abschnitt
structured metal foils in the rear section
44th
vorderer Abschnitt
front section
55
hinterer Abschnitt
rear section
66
Wabenkörper
Honeycomb body
77
Strömungskanäle
Flow channels
88th
Perforationslöcher
Perforation holes
99
Innenoberfläche des Mantelrohres
S Strömungsrichtung des Abgases
Inner surface of the casing tube
S Direction of flow of the exhaust gas
Claims (10)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19921609A DE19921609A1 (en) | 1999-05-10 | 1999-05-10 | Honeycomb body arrangement with different sections in a casing tube |
TW090216744U TW521795U (en) | 1999-05-10 | 2000-04-27 | Honeycomb body assembly with various segment in a jacket tube |
AU49176/00A AU4917600A (en) | 1999-05-10 | 2000-05-05 | Honeycomb body structure comprising various sections in a casing tube |
PCT/EP2000/004093 WO2000068550A1 (en) | 1999-05-10 | 2000-05-05 | Honeycomb body structure comprising various sections in a casing tube |
MYPI20002005A MY133156A (en) | 1999-05-10 | 2000-05-09 | Honeycomb body assembly with various segments in a jacket tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19921609A DE19921609A1 (en) | 1999-05-10 | 1999-05-10 | Honeycomb body arrangement with different sections in a casing tube |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19921609A1 true DE19921609A1 (en) | 2000-11-16 |
Family
ID=7907656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19921609A Ceased DE19921609A1 (en) | 1999-05-10 | 1999-05-10 | Honeycomb body arrangement with different sections in a casing tube |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU4917600A (en) |
DE (1) | DE19921609A1 (en) |
MY (1) | MY133156A (en) |
TW (1) | TW521795U (en) |
WO (1) | WO2000068550A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019194881A1 (en) * | 2018-04-05 | 2019-10-10 | Catalytic Combustion Corporation | Metal foil catalyst for the control of emissions from diesel engines |
CN114174648A (en) * | 2019-08-13 | 2022-03-11 | 纬湃技术有限公司 | Electrically heatable catalytic converter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2010201B3 (en) * | 1986-05-12 | 1989-11-01 | Interatom Ges Mit Beschrankter Haftung | ALVEOLATED BODY, ESPECIALLY CATALYST CARRYING BODY, WITH INTERLOCKED METAL SHEET LAYERS IN OPPOSITE SENSES AND PROCEDURE FOR ITS MANUFACTURE. |
AT396170B (en) * | 1989-06-01 | 1993-06-25 | Laimboeck Franz | EXHAUST SYSTEM FOR TWO-STROKE COMBUSTION ENGINES |
DE3939921A1 (en) * | 1989-12-02 | 1991-06-06 | Degussa | ARRANGEMENT FOR CATALYTICALLY CLEANING THE EXHAUST GAS FROM COMBUSTION ENGINES, IN PARTICULAR ACCORDING TO THE TWO-STOCK PRINCIPLE |
IN187850B (en) * | 1995-08-16 | 2002-07-06 | Emitec Emissionstechnologie | |
JP3491424B2 (en) * | 1996-01-26 | 2004-01-26 | ヤマハ発動機株式会社 | Ship engine |
-
1999
- 1999-05-10 DE DE19921609A patent/DE19921609A1/en not_active Ceased
-
2000
- 2000-04-27 TW TW090216744U patent/TW521795U/en not_active IP Right Cessation
- 2000-05-05 WO PCT/EP2000/004093 patent/WO2000068550A1/en active Application Filing
- 2000-05-05 AU AU49176/00A patent/AU4917600A/en not_active Abandoned
- 2000-05-09 MY MYPI20002005A patent/MY133156A/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019194881A1 (en) * | 2018-04-05 | 2019-10-10 | Catalytic Combustion Corporation | Metal foil catalyst for the control of emissions from diesel engines |
US11351502B2 (en) | 2018-05-04 | 2022-06-07 | Catalytic Combustion Corporation | Metal foil catalyst for the control of emissions from diesel engines |
US11759747B2 (en) | 2018-05-04 | 2023-09-19 | Catalytic Combustion Corporation | Metal foil catalyst for the control of emissions from diesel engines |
CN114174648A (en) * | 2019-08-13 | 2022-03-11 | 纬湃技术有限公司 | Electrically heatable catalytic converter |
Also Published As
Publication number | Publication date |
---|---|
AU4917600A (en) | 2000-11-21 |
MY133156A (en) | 2007-10-31 |
WO2000068550A1 (en) | 2000-11-16 |
TW521795U (en) | 2003-02-21 |
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