EP1209330B1 - Tubular apparatus for separation and combustion of soot particles, and method for cleaning particles from exhaust gas and specially from diesel exhaust gas - Google Patents
Tubular apparatus for separation and combustion of soot particles, and method for cleaning particles from exhaust gas and specially from diesel exhaust gas Download PDFInfo
- Publication number
- EP1209330B1 EP1209330B1 EP01127830A EP01127830A EP1209330B1 EP 1209330 B1 EP1209330 B1 EP 1209330B1 EP 01127830 A EP01127830 A EP 01127830A EP 01127830 A EP01127830 A EP 01127830A EP 1209330 B1 EP1209330 B1 EP 1209330B1
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- Prior art keywords
- filter
- exhaust gas
- particulates
- catalyst
- particulate
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0217—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters the filtering elements having the form of hollow cylindrical bodies
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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
- 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
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0212—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters with one or more perforated tubes surrounded by filtering material, e.g. filter candles
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0226—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being fibrous
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/10—Fibrous material, e.g. mineral or metallic wool
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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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/12—Metallic wire mesh fabric or knitting
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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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/14—Sintered material
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/065—Surface coverings for exhaust purification, e.g. catalytic reaction for reducing soot ignition temperature
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
Definitions
- the invention relates to a tubular device for the separation and combustion of Soot particles in exhaust gas streams, in particular diesel soot, with a catalyst and a filter, and a method for removing soot particles in exhaust gas streams, in particular diesel exhaust gases, by means of a tubular device, the soot particles being deposited on a filter are.
- the exhaust gas containing NO is first passed without a filter over a catalytic converter in order to convert the NO in the exhaust gas to NO 2 , before filtering to remove particles.
- the exhaust gas containing NO 2 is then used to burn the particles trapped on the filter, the amount of NO converted to NO 2 being sufficient to enable the combustion of the particles trapped on the filter to continue at a temperature of less than 400 ° C ,
- the associated device disclosed therein initially consists of a tubular device in which the above-mentioned catalyst for converting NO to NO 2 is located, after which a second tubular body has the above-mentioned filter for depositing the diesel soot.
- a disadvantage of this method and this device is the fact that one is not always satisfactory interaction in terms of efficiency between catalyst and filter can occur and in connection with this the ratio of the volume consumed to Effectiveness of the device unfavorable especially when applied to passenger cars appears.
- practice shows that only sulfur-free diesel fuel is used may be.
- this problem is solved by a device according to claim 1 A method according to claim 4 and solved by a use according to claim 5.
- EP 1 065 352 A1 a document according to Article 54 (3) EPC, describes a catalyst filter arrangement with around the catalyst arranged filter, in which no heating device is required, and which also with normal City traffic should work efficiently when the exhaust gases are not very hot.
- a catalyst for lowering is on a first filter the soot ignition point temperature applied as a coating, with a second filter first filter in the longitudinal direction of the tubular device and / or radially at least partially encloses.
- the exhaust gas containing soot particles is passed through the first filter, the soot particles are separated on the first filter and the second filter, at the same time the exhaust gas on the first filter is conditioned with the aid of the catalytic converter in order to burn of the soot particles deposited on the first and second filters.
- the second filter contains a further substance that lowers the soot ignition point, for example Fe, Cu, Mo, La, Cs, V, Ce, Zr, Si as oxides or mixed oxides and / or with the catalyst conditioning the exhaust gas, for example Pt, Pd, Ru, Rh; Ir or combinations of this, is coated, since in the first case the combustion of those deposited on the second filter Soot particles relieved and in the second case by the one fixed to the second filter A catalyst redundancy is available.
- soot ignition point for example Fe, Cu, Mo, La, Cs, V, Ce, Zr, Si as oxides or mixed oxides and / or with the catalyst conditioning the exhaust gas, for example Pt, Pd, Ru, Rh; Ir or combinations of this, is coated, since in the first case the combustion of those deposited on the second filter Soot particles relieved and in the second case by the one fixed to the second filter A catalyst redundancy is available.
- the device according to the invention is thus designed as a so-called filter candle.
- the spatial Fixing and spacing of the first and second filters from one another takes place in the Usually through radial perforated plates.
- the first filter can be provided with a catalytic aluminum oxide-containing coating be that also inorganic oxides of rare earth metals and / or La, Ti, Zr, Hf and others May contain metals.
- the coating can be precious metals, for example, as active components Pt, Pd, Rh, Ru or Ir included.
- the first filter is a wire mesh filter and / or the second Filters made of a ceramic or metallic knitted fabric, fabric, flow, fiber or sintered body exists because these embodiments have proven themselves in practice.
- exhaust gas containing soot particles is passed through a first one with a filter coated to lower the soot ignition temperature and the soot particles are separated on the first and on a second filter and simultaneously with the help of the catalytic converter, the exhaust gas for burning those separated on the first and second filters Soot particles conditioned, the second filter the first filter in the longitudinal direction and / or at least partially radially.
- the second filter is coated with a further ignition point-lowering substance and / or with the catalyst which conditions the exhaust gas, since in the first case the soot particles deposited on the second filter are easier to burn and in the second case a conditioning redundancy is provided by the catalyst fixed to the second filter Available.
- the first filter is a wire mesh filter and / or the second Filters made of a ceramic or metallic knitted fabric, fabric, flow, fiber or sintered body exists because these embodiments have proven themselves in practice.
- the device according to the invention is primarily used to remove soot particles in exhaust gas streams, especially diesel exhaust. Surprisingly, it has been shown that the The device according to the invention also works with sulfur-containing diesel exhaust gases the combustion of fuel with a maximum concentration of 500 ppm sulfur.
- Figure 1 is a sketch of a tubular device according to the invention for removing Soot particles shown in exhaust gas streams.
- the device according to the invention essentially consists of one in the longitudinal direction extending center axis tubular inner first wire mesh filter 1, the has a catalytic coating to lower the soot ignition point temperature.
- This first filter 1 is by means of a tubular perforated plate 3 from an adjacent and the first filter 1 in the longitudinal direction and radially enclosing the second filter 2.
- the second filter 2 is in turn radially surrounded by another perforated plate 3 in the longitudinal direction.
- FIG. 2 shows a sketch of another tubular device for removal according to the invention represented by soot particles in exhaust gas streams.
- the device according to the invention essentially consists of one in the longitudinal direction extending center axis tubular inner first wire mesh filter 1, the has a catalytic coating to lower the soot ignition point temperature.
- the first filter is by means of a tubular perforated plate 3 from an adjacent one and the first filter 1 partially in the longitudinal direction and completely radially enclosing second filter 2 spaced.
- the second filter 2 is in turn from a further perforated plate 3 in the longitudinal direction surrounded radially.
- the first to flow through is a filter with a wire mesh filter 1 filled tubular jacket 4. This special design shows unexpectedly high burn rates the soot particles and a correspondingly highly efficient conditioning of the exhaust gas.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
Die Erfindung betrifft eine rohrförmige Vorrichtung zur Abscheidung und Verbrennung von Rußteilchen in Abgasströmen, insbesondere Dieselruß, mit einem Katalysator und einem Filter, und ein Verfahren zum Entfernen von Rußteilchen in Abgasströmen, insbesondere Dieselabgasen, mittels einer rohrförmigen Vorrichtung, wobei die Rußteilchen auf einem Filter abgelagert sind.The invention relates to a tubular device for the separation and combustion of Soot particles in exhaust gas streams, in particular diesel soot, with a catalyst and a filter, and a method for removing soot particles in exhaust gas streams, in particular diesel exhaust gases, by means of a tubular device, the soot particles being deposited on a filter are.
Seit vielen Jahren ist die Rußteilchenproblematik bei Dieselkraftfahrzeugen bekannt, da Dieselruß im Verdacht steht, kanzerogene Wirkungen hervorzurufen. Dieses für die Umwelt wichtige Problem wurde insbesondere durch ein in EP 0 341 832 B1 offenbartes Verfahren versucht, zu beseitigen.The soot particle problem in diesel motor vehicles has been known for many years since diesel soot is suspected of causing carcinogenic effects. This is important for the environment The problem was attempted in particular by a method disclosed in EP 0 341 832 B1 remove.
Bei dem dort beanspruchten Verfahren durch Verbrennen von Teilchen, welche in einem Diesel-Abgassystem angeordneten Filter abgelagert sind, wird das NO enthaltende Abgas zuerst ohne Filter über einen Katalysator geleitet, um das NO im Abgas zu NO2 umzuwandeln, vor dem Filtern zum Entfernen von Teilchen. Das NO2 enthaltende Abgas wird dann zum Verbrennen der auf dem Filter eingefangenen Teilchen verwendet, wobei die Menge an zu NO2 umgewandelten NO ausreicht, es zu ermöglichen, die Verbrennung der auf dem Filter eingefangenen Teilchen bei einer Temperatur von weniger als 400 ° C fortzusetzen.In the method claimed there by burning particles which are deposited in a filter arranged in a diesel exhaust system, the exhaust gas containing NO is first passed without a filter over a catalytic converter in order to convert the NO in the exhaust gas to NO 2 , before filtering to remove particles. The exhaust gas containing NO 2 is then used to burn the particles trapped on the filter, the amount of NO converted to NO 2 being sufficient to enable the combustion of the particles trapped on the filter to continue at a temperature of less than 400 ° C ,
Die dort offenbarte zugehörige Vorrichtung besteht stromabwärts gesehen zunächst aus einer rohrförmigen Vorrichtung, in der sich der obengenannte Katalysator zur Umwandlung von NO in NO2 befindet, wobei im Anschluss daran ein zweiter rohrförmiger Körper den obengenannten Filter zur Ablagerung des Dieselrußes aufweist.The associated device disclosed therein, viewed downstream, initially consists of a tubular device in which the above-mentioned catalyst for converting NO to NO 2 is located, after which a second tubular body has the above-mentioned filter for depositing the diesel soot.
Nachteilig bei diesem Verfahren und dieser Vorrichtung ist die Tatsache, dass ein nicht immer befriedigendes Zusammenspiel hinsichtlich Wirkungseffizienz zwischen Katalysator und Filter auftreten kann und im Zusammenhang damit das Verhältnis von verbrauchtem Volumen zur Wirksamkeit der Vorrichtung gerade bei der Applizierung an Personenkraftwagen ungünstig erscheint. Darüber hinaus zeigt sich in der Praxis, dass nur schwefelfreier Dieselkraftstoff verwendet werden darf.A disadvantage of this method and this device is the fact that one is not always satisfactory interaction in terms of efficiency between catalyst and filter can occur and in connection with this the ratio of the volume consumed to Effectiveness of the device unfavorable especially when applied to passenger cars appears. In addition, practice shows that only sulfur-free diesel fuel is used may be.
Aus dem Vorgenannten ergibt sich das Problem, mit Hilfe eines neuartigen Verfahrens und einer neuartigen Vorrichtung die obengenannten Nachteile zumindest teilweise zu beseitigen, insbesondere im Hinblick auf die Entfernung der Rußteilchen ein hocheffizientes Verfahren und eine entsprechend korrespondierende und kompakte und damit an Personenkraftwagen leichter zu applizierende Vorrichtung bereitzustellen, die auch mit schwefelhaltigem Dieselkraftstoff problemlos funktioniert.The problem arises from the above, with the aid of a novel method and one novel device to at least partially eliminate the disadvantages mentioned above, a highly efficient process and especially with regard to the removal of the soot particles a correspondingly corresponding and compact and therefore lighter on passenger cars to provide device to be applied, which also with sulfur-containing diesel fuel works fine.
Dieses Problem wird erfindungsgemäß durch eine Vorrichtung nach Anspruch 1, durch ein
Verfahren nach Anspruch 4 und durch eine Verwendung nach Anspruch 5 gelöst.According to the invention, this problem is solved by a device according to claim 1
A method according to
Des weiteren beschreibt EP 1 065 352 A1, ein Dokument gemäss Artikel 54(3) EPÜ, eine Katalysator-Filter-Anordnung mit um den Katalysator
angeordnetem Filter, bei der keine Heizvorrichtung benötigt wird, und die auch bei normalem
Stadtverkehr effizient funktionieren soll, wenn die Abgase wenig heiß sind.Furthermore,
Bei der erfindungsgemäßen Vorrichtung ist auf einem ersten Filter ein Katalysator zur Absenkung der Rußzündpunkttemperatur als Beschichtung aufgebracht, wobei ein zweiter Filter den ersten Filter in Längsrichtung der rohrförmigen Vorrichtung und/oder radial zumindest teilweise umschließt. Dadurch wird das Rußteilchen enthaltende Abgas durch den ersten Filter geführt, dabei die Rußteilchen am ersten Filter und am zweiten Filter abgeschieden, gleichzeitig wird das Abgas am ersten Filter mit Hilfe des Katalysators derart konditioniert, um zum Verbrennen der am ersten und zweiten Filter abgeschiedenen Rußteilchen verwendet zu werden.In the device according to the invention, a catalyst for lowering is on a first filter the soot ignition point temperature applied as a coating, with a second filter first filter in the longitudinal direction of the tubular device and / or radially at least partially encloses. As a result, the exhaust gas containing soot particles is passed through the first filter, the soot particles are separated on the first filter and the second filter, at the same time the exhaust gas on the first filter is conditioned with the aid of the catalytic converter in order to burn of the soot particles deposited on the first and second filters.
Es ist vorgesehen, dass der zweite Filter mit einer weiteren rußzündpunkterniedrigenden Substanz, beispielsweise Fe, Cu, Mo, La, Cs, V, Ce, Zr, Si als Oxide oder Mischoxide und/oder mit dem das Abgas konditionierenden Katalysator, beispielsweise Pt, Pd, Ru, Rh; Ir oder Kombinationen hiervon, beschichtet ist, da im ersten Fall das Verbrennen der am zweiten Filter abgeschiedenen Rußteilchen erleichtert und im zweiten Fall durch den am zweiten Filter fixierten Katalysator eine Konditionierungsredundanz zur Verfügung steht.It is provided that the second filter contains a further substance that lowers the soot ignition point, for example Fe, Cu, Mo, La, Cs, V, Ce, Zr, Si as oxides or mixed oxides and / or with the catalyst conditioning the exhaust gas, for example Pt, Pd, Ru, Rh; Ir or combinations of this, is coated, since in the first case the combustion of those deposited on the second filter Soot particles relieved and in the second case by the one fixed to the second filter A catalyst redundancy is available.
Die erfindungsgemäße Vorrichtung ist somit als sogenannte Filterkerze ausgeführt. Die räumliche Fixierung und Beabstandung des ersten und zweiten Filters voneinander geschieht in der Regel durch radiale Lochbleche. Das Verbrennen der abgeschiedenen Rußteilchen verläuft in der Regel bei Temperaturen T < = + 400°C, wobei auch höhere Temperaturen denkbar sind. Oberraschend ist die Tatsache, dass aufgrund der spezifischen Anordnung der einzelnen Komponenten zueinander, ein problemloser Betrieb mit schwefelhaltigem Dieselkraftstoff erst ermöglicht wird, der ggf. durch die sich dann einstellende Konditionierung des Abgases zu erklären ist. Der erste Filter kann mit einer katalytischen aluminiumoxidhaltigen Beschichtung versehen sein, die auch anorganische Oxide der Seltenerdmetalle und/oder La, Ti, Zr, Hf sowie anderer Metalle enthalten kann. Die Beschichtung kann als Aktivkomponenten Edelmetalle, beispielsweise Pt, Pd, Rh, Ru oder Ir enthalten.The device according to the invention is thus designed as a so-called filter candle. The spatial Fixing and spacing of the first and second filters from one another takes place in the Usually through radial perforated plates. The combustion of the separated soot particles takes place in generally at temperatures T <= + 400 ° C, although higher temperatures are also conceivable. The fact that due to the specific arrangement of the individual components is surprising to each other, a trouble-free operation with sulfur-containing diesel fuel is only possible , which may be explained by the resulting conditioning of the exhaust gas is. The first filter can be provided with a catalytic aluminum oxide-containing coating be that also inorganic oxides of rare earth metals and / or La, Ti, Zr, Hf and others May contain metals. The coating can be precious metals, for example, as active components Pt, Pd, Rh, Ru or Ir included.
Weiterhin ist es von Vorteil, wenn der erste Filter ein Drahtgestrickfilter ist und/oder der zweite Filter aus einem keramischen oder metallischen Gestrick, Gewebe, Fließ, Faser- oder Sinterkörper besteht, da sich diese Ausführungsformen in der Praxis bewährt haben.It is also advantageous if the first filter is a wire mesh filter and / or the second Filters made of a ceramic or metallic knitted fabric, fabric, flow, fiber or sintered body exists because these embodiments have proven themselves in practice.
Beim erfindungsgemäßen Verfahren wird Rußteilchen enthaltendes Abgas durch einen ersten mit einem die Rußzündpunkttemperatur absenkenden Katalysator beschichteten Filter geführt und dabei die Rußteilchen am ersten und an einem zweiten Filter abgeschieden und gleichzeitig mit Hilfe des Katalysators das Abgas zum Verbrennen der am ersten und zweiten Filter abgeschiedenen Rußteilchen konditioniert, wobei der zweite Filter den ersten Filter in Längsrichtung und/oder radial zumindest teilweise umschließt.In the method according to the invention, exhaust gas containing soot particles is passed through a first one with a filter coated to lower the soot ignition temperature and the soot particles are separated on the first and on a second filter and simultaneously with the help of the catalytic converter, the exhaust gas for burning those separated on the first and second filters Soot particles conditioned, the second filter the first filter in the longitudinal direction and / or at least partially radially.
Bei diesem Verfahren ist der zweite Filter mit einer weiteren zündpunkterniedrigenden Substanz und/oder mit dem das Abgas konditionierenden Katalysator beschichtet, da im ersten Fall das Verbrennen der am zweiten Filter abgeschiedenen Rußteilchen erleichtert und im zweiten Fall durch den am zweiten Filter fixierten Katalysator eine Konditionierungsredundanz zur Verfügung steht. In this method, the second filter is coated with a further ignition point-lowering substance and / or with the catalyst which conditions the exhaust gas, since in the first case the soot particles deposited on the second filter are easier to burn and in the second case a conditioning redundancy is provided by the catalyst fixed to the second filter Available.
Weiterhin ist es vorteilhaft, dass der erste Filter ein Drahtgestrickfilter ist und/oder der zweite Filter aus einem keramischen oder metallischen Gestrick, Gewebe, Fließ, Faser- oder Sinterkörper besteht, da sich diese Ausführungsformen in der Praxis bewährt haben.It is also advantageous that the first filter is a wire mesh filter and / or the second Filters made of a ceramic or metallic knitted fabric, fabric, flow, fiber or sintered body exists because these embodiments have proven themselves in practice.
Die erfindungsgemäße Vorrichtung dient in erster Linie zum Entfernen von Rußteilchen in Abgasströmen, insbesondere Dieselabgasen. In überraschender Weise hat sich gezeigt, dass die erfindungsgemäße Vorrichtung auch bei schwefelhaltigen Dieselabgasen funktioniert, die aus der Verbrennung von Kraftstoff mit einer Maximalkonzentration von 500 ppm Schwefel stammen.The device according to the invention is primarily used to remove soot particles in exhaust gas streams, especially diesel exhaust. Surprisingly, it has been shown that the The device according to the invention also works with sulfur-containing diesel exhaust gases the combustion of fuel with a maximum concentration of 500 ppm sulfur.
Das nachfolgende Beispiel dient zur Erläuterung der Erfindung.The following example serves to explain the invention.
Es zeigen:
Figur 1- eine skizzenhafte Darstellung einer erfindungsgemäßen rohrförmigen Vorrichtung.
Figur 2- eine skizzenhafte Darstellung einer weiteren erfindungsgemäßen rohrförmigen Vorrichtung.
- Figure 1
- a sketchy representation of a tubular device according to the invention.
- Figure 2
- a sketchy representation of a further tubular device according to the invention.
In Figur 1 ist skizzenhaft eine erfindungsgemäße rohrförmige Vorrichtung zum Entfernen von Rußteilchen in Abgasströmen dargestellt.In Figure 1 is a sketch of a tubular device according to the invention for removing Soot particles shown in exhaust gas streams.
Die erfindungsgemäße Vorrichtung besteht im wesentlichen aus einem bezüglich der in Längsrichtung
verlaufenden Mittelpunktachse rohrförmigen inneren ersten Drahtgestrickfilter 1, der
eine katalytische Beschichtung zur Absenkung der Rußzündpunkttemperatur aufweist. Dieser
erste Filter 1 ist mittels eines rohrförmigen Lochbleches 3 von einem darauf anliegenden und
den ersten Filter 1 in Längsrichtung und radial umschließenden zweiten Filter 2 beabstandet.
Der zweite Filter 2 ist wiederum von einem weiteren Lochblech 3 in Längsrichtung radial umgeben.The device according to the invention essentially consists of one in the longitudinal direction
extending center axis tubular inner first
Bei Einsatz einer solchen Vorrichtung wird entsprechendes Dieselabgas axial in die rohrförmige Vorrichtung (Filterkerze) eingeführt und radial über den 2. Filter abgelassen.When using such a device, corresponding diesel exhaust gas is axially into the tubular Device (filter candle) inserted and drained radially over the 2nd filter.
In Figur 2 ist skizzenhaft eine weitere erfindungsgemäße rohrförmige Vorrichtung zum Entfernen von Rußteilchen in Abgasströmen dargestellt.FIG. 2 shows a sketch of another tubular device for removal according to the invention represented by soot particles in exhaust gas streams.
Die erfindungsgemäße Vorrichtung besteht im wesentlichen aus einem bezüglich der in Längsrichtung
verlaufenden Mittelpunktachse rohrförmigen inneren ersten Drahtgestrickfilter 1, der
eine katalytische Beschichtung zur Absenkung der Rußzündpunkttemperatur aufweist. Dieser
erste Filter ist mittels eines rohrförmigen Lochbleches 3 von einem darauf anliegenden und den
ersten Filter 1 teilweise in Längsrichtung und vollständig radial umschließenden zweiten Filter 2
beabstandet. Der zweite Filter 2 ist wiederum von einem weiteren Lochblech 3 in Längsrichtung
radial umgeben. Als zuerst zu durchströmender Aufsatz fungiert ein mit weiterem Drahtgestrickfilter
1 gefüllter rohrförmiger Mantel 4. Diese spezielle Ausgestaltung zeigt unerwartet hohe Abbrandraten
der Rußteilchen sowie eine entsprechend hocheffiziente Konditionierung des Abgases.The device according to the invention essentially consists of one in the longitudinal direction
extending center axis tubular inner first
Claims (6)
- Tubular apparatus for trapping and incinerating particulates in exhaust gas flows, especially diesel exhaust particulates, with a catalyst and a filter, and with a catalyst lowering the particulate ignition temperature applied as a coating on a first filter (1 ), wherein a second filter (2) at least partly surrounds the first filter (1) in the longitudinal direction and/or radially so that particulate-laden exhaust gas is led through the first filter (1 ), the particulates are trapped at the first filter (1 ) and at the second filter (2), and the exhaust gas is simultaneously conditioned at the first filter (1) for the incineration of the particulates trapped at the first and second filters (1, 2), wherein the second filter (2) is coated with a further substance lowering the particulate ignition temperature and/or with the catalyst conditioning the exhaust gas.
- Apparatus according to Claim 1, characterized in that the first filter (1) is a wire-mesh filter.
- Apparatus according to Claim 1 or Claim 2, characterized in that the second filter (2) consists of a ceramic or metallic mesh, woven or nonwoven fabric, fibrous mass, or sintered compact.
- Method for removing particulates from exhaust gas flows, especially diesel exhaust gases, by means of a tubular apparatus, wherein the particulates are deposited on a filter, wherein(a) particulate-laden exhaust gas is led through a first filter (1) coated with a catalyst lowering the particulate ignition temperature,(b) the particulates are trapped at the first, and at a second, filter (1, 2),(c) the exhaust gas is simultaneously conditioned with the aid of the catalyst for the incineration of the particulates trapped at the first and second filters (1, 2), the second filter (2) at least partly surrounding the first filter (1) radially in the longitudinal direction, and(d) the second filter (2) is coated with a further substance lowering the particulate ignition temperature and/or with the catalyst conditioning the exhaust gas.
- Use of an apparatus according to any one of Claims 1 to 3 for removing particulates from exhaust gas flows, especially diesel exhaust gases.
- Use according to Claim 5 wherein the exhaust gas flows involved are sulphur-laden diesel exhaust gases yielded by combustion of fuel with a maximum sulphur concentration of 500 ppm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10058824 | 2000-11-27 | ||
DE10058824A DE10058824A1 (en) | 2000-11-27 | 2000-11-27 | Tubular device for the separation and combustion of soot particles in exhaust gas streams, in particular diesel soot, and method for removing soot particles in exhaust gas streams, in particular diesel exhaust gases |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1209330A1 EP1209330A1 (en) | 2002-05-29 |
EP1209330B1 true EP1209330B1 (en) | 2004-09-08 |
Family
ID=7664818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01127830A Expired - Lifetime EP1209330B1 (en) | 2000-11-27 | 2001-11-22 | Tubular apparatus for separation and combustion of soot particles, and method for cleaning particles from exhaust gas and specially from diesel exhaust gas |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1209330B1 (en) |
DE (2) | DE10058824A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1678820B (en) * | 2002-08-02 | 2012-02-29 | 发射技术有限公司 | Exhaust gas filter and method for cleaning an exhaust gas |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10309862B4 (en) * | 2003-03-06 | 2006-07-13 | Rhodius Gmbh | Device for removing pollutants from an exhaust gas of an internal combustion engine, in particular a diesel engine |
US20080236118A1 (en) * | 2007-03-27 | 2008-10-02 | Meyer Robert L | Exhaust particulate filter for a machine engine system and assembly method therefor |
GB2546488B (en) | 2016-01-19 | 2020-05-13 | Ford Global Tech Llc | An engine exhaust gas recirculation system with at least one exhaust recirculation treatment device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4600562A (en) * | 1984-12-24 | 1986-07-15 | Texaco Inc. | Method and apparatus for filtering engine exhaust gas |
US4902487A (en) * | 1988-05-13 | 1990-02-20 | Johnson Matthey, Inc. | Treatment of diesel exhaust gases |
US5067319A (en) * | 1989-02-15 | 1991-11-26 | Steyr-Daimler-Puch Ag | System for purifying the exhaust gases of diesel engines |
DE4012719A1 (en) * | 1990-04-21 | 1991-10-24 | Roggenkamp Karl Heinz | Engine esp. diesel engine exhaust gas purificn. by complete filtration - with gas permeable filter of refractory fibres to remove solid particles, e.g. soot |
JPH04279712A (en) * | 1991-03-06 | 1992-10-05 | Nissan Motor Co Ltd | Exhaust gas purifying device for internal combustion engine |
JP2001073742A (en) * | 1999-06-29 | 2001-03-21 | Sumitomo Electric Ind Ltd | Particulate trap for diesel engine |
DE19933442B4 (en) * | 1999-07-16 | 2009-03-19 | Mann + Hummel Gmbh | Particle filter with a filter medium and a catalyst |
-
2000
- 2000-11-27 DE DE10058824A patent/DE10058824A1/en not_active Withdrawn
-
2001
- 2001-11-22 EP EP01127830A patent/EP1209330B1/en not_active Expired - Lifetime
- 2001-11-22 DE DE50103526T patent/DE50103526D1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1678820B (en) * | 2002-08-02 | 2012-02-29 | 发射技术有限公司 | Exhaust gas filter and method for cleaning an exhaust gas |
Also Published As
Publication number | Publication date |
---|---|
DE10058824A1 (en) | 2002-06-13 |
DE50103526D1 (en) | 2004-10-14 |
EP1209330A1 (en) | 2002-05-29 |
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