DE3828516C1 - Soot particle filter regeneration - in which particles in filter for diesel engine exhaust fumes are burned off to regenerate filter by exothermic reaction - Google Patents
Soot particle filter regeneration - in which particles in filter for diesel engine exhaust fumes are burned off to regenerate filter by exothermic reactionInfo
- Publication number
- DE3828516C1 DE3828516C1 DE19883828516 DE3828516A DE3828516C1 DE 3828516 C1 DE3828516 C1 DE 3828516C1 DE 19883828516 DE19883828516 DE 19883828516 DE 3828516 A DE3828516 A DE 3828516A DE 3828516 C1 DE3828516 C1 DE 3828516C1
- Authority
- DE
- Germany
- Prior art keywords
- filter
- copper
- soot
- soot particle
- reaction material
- 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.)
- Expired
Links
- 239000004071 soot Substances 0.000 title claims abstract description 40
- 239000002245 particle Substances 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 18
- 230000008929 regeneration Effects 0.000 title claims description 5
- 238000011069 regeneration method Methods 0.000 title claims description 5
- 239000003517 fume Substances 0.000 title abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052802 copper Inorganic materials 0.000 claims abstract description 40
- 239000010949 copper Substances 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- 239000005751 Copper oxide Substances 0.000 description 3
- 229910000431 copper oxide Inorganic materials 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
Classifications
-
- 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
- F01N3/031—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 having means for by-passing filters, e.g. when clogged or during cold engine start
- F01N3/032—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 having means for by-passing filters, e.g. when clogged or during cold engine start during filter regeneration only
-
- 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
- F01N13/011—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 purifying devices arranged in parallel
-
- 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
-
- 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
-
- 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
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
-
- 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
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
- F01N2410/04—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device during regeneration period, e.g. of particle filter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Regenera tion von Rußpartikelfilter, insbesondere für die Nachbehand lung der Abgase von Dieselmotoren durch Oxidation und Zufuhr von thermischer Energie eines im Rußpartikelfilter durch thermische Reaktion umgesetzten Reaktionsmaterials.The invention relates to a method for regeneration soot particle filter, especially for aftertreatment Exhaust gases from diesel engines through oxidation and Supply of thermal energy in a soot particle filter reaction material reacted by thermal reaction.
Ein Verfahren der gattungsgemäßen Art ist beispielsweise aus der EP-A 01 17 534 bekannt. Die thermische Energie zur Erhöhung der Temperatur im Rußfilter wird hierbei durch Verbrennen von Kraftstoff als Reaktionsmaterial erzielt. Die hierbei entstehenden heißen Abgase werden anschließend vom Brenner unterstützt in das Filtersystem eingeleitet. Da hierbei das Abgas mit aufgeheizt werden muß, ist dieses Verfahren mit einem hohen Kraftstoffverbrauch verbunden, d. h. es ist der Einsatz einer hohen externen Energiemenge erforderlich, um innerhalb des Filters die Rußabbrandtempera tur zu erreichen. Außerdem fällt mit der Verbrennung des Kraftstoffes weiterer Ruß an, der das Filtersystem zusätz lich belastet.A method of the generic type is for example known from EP-A 01 17 534. The thermal energy for This increases the temperature in the soot filter Burning fuel achieved as a reaction material. The resulting hot exhaust gases are then initiated by the burner into the filter system. Since the exhaust gas must also be heated here, this is Process associated with high fuel consumption, d. H. it is the use of a large amount of external energy required to control the soot burn-off temperature inside the filter to achieve. In addition, the combustion of the Fuel soot on the additional filter system Lich burdened.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem die Rußabbrandtemperatur im Rußpartikel filter unter Einsatz einer möglichst geringen externen Energie bei kleinem Aufwand erreichbar ist.The invention has for its object a method specify the soot burn-off temperature in the soot particle filter using the smallest possible external Energy can be achieved with little effort.
Die Aufgabe ist erfindungsgemäß dadurch gelöst, daß das Reaktionsmaterial in der Filterbeladungsphase durch Restsauerstoff im Abgas zu einem Oxid umgesetzt wird, das anschließend gegen Ende der Filterbelastungsphase das Reaktionsmaterial durch Zugabe von Kohlenmonoxid reduziert wird und daß danach mit Erreichen eines vorgegebenen Beladungszustandes das reduzierte Reaktionsmaterial durch erhöhte Sauerstoffzufuhr wieder oxidiert wird.The object is achieved in that the Reaction material in the filter loading phase Residual oxygen in the exhaust gas is converted to an oxide, that towards the end of the filter loading phase Reaction material reduced by adding carbon monoxide and that after reaching a predetermined Loading state through the reduced reaction material increased oxygen supply is oxidized again.
Bei dem erfindungsgemäßen Verfahren wird durch einfache Reduktion und anschließende Oxidation eines regenerierfä higen Reaktionsmaterials soviel thermische Energie gewon nen, daß das Rußfiltersystem zumindest die Rußabbrenntem peratur erreicht. Hierdurch wird der Einsatz von externer Energie möglichst gering gehalten. Hinzu kommt, daß die exothermen Reaktionen innerhalb des Rußpartikelfilters ablaufen, so daß die hierdurch freigesetzte Energie lokal im Filter entsteht, wodurch ein spezielles Einbringen der Energie über die Abgase entfällt. Schließlich hat das erfindungsgemäße Verfahren noch den Vorteil, daß bei dieser Form der Energiegewinnung zur Anhebung der Tempera tur im Rußpartikelfilter kein zusätzlicher Ruß entsteht. In the method according to the invention, simple Reduction and subsequent oxidation of a regenerable so much thermal energy NEN that the soot filter system at least burns off the soot temperature reached. This will make the use of external Energy kept as low as possible. In addition, the exothermic reactions within the soot particle filter run off, so that the energy released thereby local arises in the filter, which means that the There is no energy from the exhaust gases. After all, that has The inventive method still has the advantage that at this form of energy production to raise the tempera No additional soot arises in the soot particle filter.
Zur Durchführung des Verfahrens eignet sich in besonderer Weise eine Vorrichtung mit einem Rußpartikelfilter, in dem gemäß Anspruch 2 als Reaktionsmaterial Kupfer eingesetzt ist. Die Verwendung von Kupfer hat den Vorteil, daß mit Hilfe von Reduktions- und Oxidationszyklen insgesamt eine exotherme Reaktion entsteht, bei der soviel thermische Energie freigesetzt wird, daß innerhalb des Rußpartikelfil ters mit Sicherheit die Rußabbrandtemperatur überschritten wird. Die dabei benötigte Menge Kupfer ist abhängig von der anfallenden Rußpartikelmenge. Das Kupfer wirkt somit wie der Brenner aus der gattungsbildenden Druckschrift. Gemäß Anspruch 3 wird eine Vorrichtung zur Durchführung des Verfahrens aufgezeigt, die einen Rußpartikelfilter mit einem keramischen Filterkörper (Monolith) aufweist. Damit die thermische Energie lokal am Filterkörper freigesetzt wird, ist das Kupfer auf der Oberfläche des keramischen Filterkörpers aufgebracht.The procedure is particularly suitable Way a device with a soot particle filter in which used according to claim 2 as the reaction material copper is. The use of copper has the advantage that with With the help of reduction and oxidation cycles a total of one exothermic reaction arises, with so much thermal Energy is released that within the soot particle ters certainly exceeded the soot burning temperature becomes. The amount of copper required depends on the amount of soot particles. The copper works like the burner from the generic publication. According to claim 3, a device for performing of the method shown using a soot particle filter has a ceramic filter body (monolith). In order to the thermal energy is released locally on the filter body is, the copper is on the surface of the ceramic Filter body applied.
Gemäß Anspruch 4 besteht die Vorrichtung zur Durchführung des Verfahrens aus einem Rußpartikelfilter mit einem aus Keramikgarn hergestellten Wickelfilter. Damit die Energie lokal im Wickelfilter freigesetzt wird, ist Kupfer als Kupfergarn in die Wickellagen eingewebt. Der gleiche Effekt wird auch erzielt, wenn das Kupfer beispielsweise in Form von Kupfergaze um den Filterkörper gewickelt ist.According to claim 4, the device for performing of the process from a soot particle filter with one Ceramic filter manufactured wound filter. So the energy is released locally in the wound filter is copper as Copper yarn woven into the winding layers. The same Effect is also achieved when the copper, for example is wrapped around the filter body in the form of copper gauze.
Schließlich kann auch in vorteilhafter Weise das Kupfer aus einem gas- und partikeldurchlässigen Block bestehen, der stromauf des Filterkörpers angeordnet ist.Finally, the copper can also advantageously consist of a gas and particle permeable block, which is arranged upstream of the filter body.
Das erfindungsgemäße Verfahren wird nachfolgend anhand eines Rußpartikelfilters mit einem gewickelten Filterkörper näher erläutert.The method according to the invention is described below a soot particle filter with a wound filter body explained in more detail.
Fig. 1 zeigt in einer schematischen Darstellung einen Dieselmotor mit in der Abgasleitung im Schnitt dargestelltem Wickelfilter, Fig. 1 shows a schematic representation of a diesel engine with depicted in the exhaust pipe in cross-section winding filter,
Fig. 2 zeigt in einer vergrößerten perspektivischen Darstellung eine Filterkerze des Wickelfil ters aus Fig. 1 und Fig. 2 shows an enlarged perspective view of a filter candle of the Wickelfil age from Fig. 1 and
Fig. 3 zeigt in einer schematischen Darstellung einen Dieselmotor mit zwei in der Abgaslei tung parallel angeordneten Rußfiltern. Fig. 3 shows a schematic representation of a diesel engine with two soot filters arranged in parallel in the exhaust line.
Von einem Dieselmotor 1 ist ein Abgasleitungsstrang 2 abgeführt, in dessen Verlauf ein Rußpartikelfilter 3 angeordnet ist. Im Filtergehäuse 4 befindet sich ein Filterkörper 5 der als Wickelfilter ausgebildet ist. Das Wickelfilter besteht aus einem Bündel von gelochten Rohrträgern 6 auf denen kreuzweise ein Keramikgarn in mehreren Lagen als Filterschicht aufgewickelt ist. Die rohrförmigen Träger sind in Anströmrichtung verschlossen. Dem Wickelfilter in Strömungsrichtung vorgelagert ist ein gas- und partikeldurchlässiger zylindrischer Block aus Kupfer. Der Kupferblock 7 dient dabei zur Erzeugung von thermischer Energie zur Anhebung der Temperatur im Filter auf die Rußabbrenntemperatur. Die hierzu erforderliche wechselweise Reduktion und Oxidation des Kupfermaterials wird dabei wie folgt gesteuert:An exhaust gas line 2 is discharged from a diesel engine 1 , in the course of which a soot particle filter 3 is arranged. In the filter housing 4 there is a filter body 5 which is designed as a wound filter. The wound filter consists of a bundle of perforated tube supports 6 on which a ceramic yarn is wound crosswise in several layers as a filter layer. The tubular supports are closed in the flow direction. A gas and particle permeable cylindrical block made of copper is located upstream of the wound filter in the direction of flow. The copper block 7 is used to generate thermal energy to raise the temperature in the filter to the soot burning temperature. The alternate reduction and oxidation of the copper material required for this is controlled as follows:
Während des Motorbetriebes durchströmen die Abgase aus dem Abgasleitungssystem 2 zunächst den Kupferblock 7 und sodann den Wickelkörper 5. Die im Abgas mitgeführten Rußpartikel werden dabei im Filterkörper 5 abgefangen. In dieser sogenannten Beladungsphase des Rußfilters 4 wird das Kupfermaterial des Blockes 7 durch den Restsauerstoff zu Kupferoxid umgesetzt. Gegen Ende der Filterbeladungs phase, die beispielsweise über den Abgasgegendruck ge steuert werden kann, wird der Kupferblock mit Kohlen monoxid als Reduktionsmittel beaufschlagt. Das Kohlen monoxid wird dabei beispielsweise in einem Spaltvergaser gewonnen, welcher in der Zeichnung nicht dargestellt ist. Die Einspeisung von Kohlenmonoxid in das Filtergehäuse ist durch den Pfeil 8 angedeutet. Durch das Kohlenmonoxid wird das Kupferoxid zu Kupfer reduziert. Der Reaktionsablauf ist exotherm. Die hierdurch im Kupfer freiwerdende thermi sche Energie wird über das Abgas auf den Filterkörper 5 übertragen, dessen Temperatur damit auf ein Temperaturni veau angehoben wird, das über der durchschnittlichen Abgastemperatur liegt.During engine operation, the exhaust gases from the exhaust pipe system 2 first flow through the copper block 7 and then through the winding body 5 . The soot particles carried in the exhaust gas are intercepted in the filter body 5 . In this so-called loading phase of the soot filter 4 , the copper material of the block 7 is converted to copper oxide by the residual oxygen. Towards the end of the filter loading phase, which can be controlled, for example, via the exhaust gas back pressure, the copper block is acted on with carbon monoxide as a reducing agent. The carbon monoxide is obtained for example in a split gasifier, which is not shown in the drawing. The feed of carbon monoxide into the filter housing is indicated by the arrow 8 . The carbon monoxide reduces the copper oxide to copper. The course of the reaction is exothermic. The thereby released in copper thermal energy is transferred via the exhaust gas to the filter body 5 , the temperature of which is thus raised to a temperature level that is above the average exhaust gas temperature.
Mit Erreichen eines vorgegebenen Beladungszustandes des Filterkörpers 5, der beispielsweise über den Abgasgegendruck erkannt wird, wird das Kupfermaterial nunmehr durch den Restsauerstoff der Abgase und ggf. durch von außen zusätz lich zugeführten Sauerstoff wieder oxidiert. Die Zuführung von zusätzlichem Sauerstoff ist dabei durch den Pfeil 9 und die Meßstelle zur Entnahme des Abgasgegendruckes durch einen Pfeil 10 angedeutet. Der Oxidationsvorgang des Kupfers verläuft ebenfalls exotherm. Durch die dabei im Kupferblock 7 freigesetzte Energie wird der Filterkörper 4 auf die Abbrenntemperatur des Rußes angehoben. Nachdem die Rußabbrenntemperatur im Filterkörper 5 erreicht ist, genügt die thermische Energie und die Anwesenheit von Sauerstoff um das Rußfilter freizubrennen. Die Regenera tion des Rußfilters widerholt sich automatisch nach jeder Filterbeladungsphase.When a predetermined loading state of the filter body 5 is reached , which is recognized, for example, by the exhaust gas back pressure, the copper material is now oxidized again by the residual oxygen in the exhaust gases and, if appropriate, by oxygen additionally supplied from outside. The supply of additional oxygen is indicated by arrow 9 and the measuring point for removing the exhaust gas back pressure by arrow 10 . The oxidation process of the copper is also exothermic. By liberated in the copper block 7 energy of the filter body 4 is raised to the light-off temperature of the soot. After the soot burn-off temperature in the filter body 5 is reached, the thermal energy and the presence of oxygen are sufficient to burn the soot filter freely. The regeneration of the soot filter repeats itself automatically after each filter loading phase.
Gemäß Fig. 1 besteht der Filterkörper 5 aus einem Bündel einzelner Stabfilter. Einzelheiten eines solchen Stabfil ters sind in Fig. 2 gezeigt. Auf dem gelochten rohrförmi gen Träger 6 ist ein Keramikgarn 11 in mehreren Lagen kreuzweise aufgewickelt. Zwischen den einzelnen Wickella gen verbleiben feine Kanäle, in denen die Rußpartikel abgefangen werden. Abweichend von Fig. 1 wird die thermi sche Energie zur Anhebung der Temperatur in der Filterker ze auf die Rußabbrenntemperatur von einer Kupfergaze 12 erzeugt, welche die Wickelschicht des Stabfilters als Mantel umgibt. Anstelle der Kupfergaze ist es auch möglich einen Kupferfaden zusammen mit dem Keramikgarn auf den rohrförmigen Träger 6 aufzuwickeln. Dies ist von Vorteil, weil hierdurch die während der Oxidations- und Reduktions zyklen im Kupfer erzeugte thermische Energie lokal in den Filterelementen freigesetzt wird. Der Einsatz von Kupfer als sekundärem Energieerzeuger ist auch bei anderen Partikelfiltersystemen denkbar. So ist es möglich, den in Fig. 1 gezeigten Kupferblock 7 in Verbindung mit einem nachgeordneten keramischen Filterkörper (Monolith) zu verwenden. Dabei kann das Kupfer auch direkt auf der Oberfläche des keramischen Filterkörpers aufgebracht sein. Dies ist von Vorteil, da hierdurch die während der Oxida tion- und Reduktionszyklen im Kupfer frei werdende Energie unmittelbar auf den Filterkörper übertragen wird.Referring to FIG. 1 5, the filter body consists of a bundle of individual rod filter. Details of such a Stabfil ters are shown in Fig. 2. On the perforated Rohrhri gene carrier 6 , a ceramic yarn 11 is wound crosswise in several layers. Fine channels remain between the individual wickella genes in which the soot particles are trapped. Deviating from FIG. 1, the thermi specific energy for raising the temperature in the Filterker ze the Rußabbrenntemperatur by a copper gauze 12 generates surrounding the winding layer of the rod filter as a coat. Instead of the copper gauze, it is also possible to wind a copper thread together with the ceramic yarn on the tubular carrier 6 . This is advantageous because the thermal energy generated in the copper during the oxidation and reduction cycles is released locally in the filter elements. The use of copper as a secondary energy generator is also conceivable for other particle filter systems. It is thus possible to use the copper block 7 shown in FIG. 1 in connection with a downstream ceramic filter body (monolith). The copper can also be applied directly to the surface of the ceramic filter body. This is of advantage since the energy released during the oxidation and reduction cycles in the copper is transferred directly to the filter body.
Fig. 3 zeigt eine Motoranlage mit zwei parallel im Abgasleitungssystem angeordneten Rußpartikelfiltern 13 und 14. Beide Rußpartikelfilter 13 und 14 sind dabei an einen Vorschalldämpfer 15 angeschlossen. Hinsichtlich Aufbau und Wirkungsweise stimmen beide Rußpartikelfilter 13 und 14 mit dem Rußpartikelfilter 3 aus Fig. 1 überein. Funktions gleiche Bauelemente sind in beiden Ausführungsbeispielen mit den gleichen Bezugszeichen versehen. Die Rußpartikelfil ter 13 und 14 werden wechselweise vom Abgas durchströmt. Gesteuert wird der Abgasstrom von zwei Abgasklappen 16 und 17, die innerhalb von Verbindungsstützen zwischen Vorschall dämpfer 15 und den Rußpartikelfiltern 13 bzw. 14 eingesetzt sind. Fig. 3 shows an engine installation with two parallel in the exhaust gas line system arranged particulate filters 13 and 14. Both soot particle filters 13 and 14 are connected to a front silencer 15 . With regard to structure and mode of operation, both soot particle filters 13 and 14 match the soot particle filter 3 from FIG. 1. Functionally identical components are provided with the same reference numerals in both exemplary embodiments. The soot particle filter 13 and 14 are alternately flowed through by the exhaust gas. The exhaust gas flow is controlled by two exhaust flaps 16 and 17 which are used within connecting supports between the pre-silencer 15 and the soot particle filters 13 and 14, respectively.
Gemäß Fig. 3 befindet sich die Abgasklappe 17 in der geöffneten Stellung, so daß das Rußpartikelfilter 14 vom gesamten Abgas durchströmt wird. In dieser sogenannten "Beladungsphase" wird das Kupfermaterial des Blockes 7 im Filter 14 durch den Restsauerstoff im Abgas zu Kupferoxid umgesetzt, bzw. gegen Ende der Beladungsphase mit Kohlen monoxid als Reduktionsmittel beaufschlagt. Während der Beladung des Filters 14 wird das Rußpartikelfilter 13 regeneriert. Die Abgasklappe 16 ist geschlossen, so daß der Regenerationsvorgang unbeeinträchtigt vom Abgas ablaufen kann. Außerdem ist es hierdurch möglich, die Reduktions- bzw. Oxidationsmittel ungestört einzubringen. Die Steuerung der Abgasklappen 16 und 17 kann dabei über den Abgasgegendruck oder in Abhängigkeit von der Ein bringung der Oxidations- und Reduktionsmittel erfolgen.According to Fig. 3 there is the exhaust valve 17 in the open position, so that the particulate filter 14 is passed through by the entire exhaust gas. In this so-called "loading phase", the copper material of the block 7 in the filter 14 is converted to copper oxide by the residual oxygen in the exhaust gas, or is charged with carbon monoxide as a reducing agent towards the end of the loading phase. The soot particle filter 13 is regenerated while the filter 14 is being loaded. The exhaust flap 16 is closed, so that the regeneration process can proceed unimpeded by the exhaust gas. In addition, this makes it possible to introduce the reducing or oxidizing agents in an undisturbed manner. The control of the exhaust flaps 16 and 17 can be done via the exhaust gas back pressure or depending on the introduction of the oxidizing and reducing agents.
Claims (7)
- - daß das Reaktionsmaterial (7, 12) in der Filterbela dungsphase durch Restsauerstoff im Abgas zu einem Oxid umgesetzt wird,
- - daß anschließend gegen Ende der Filterbeladungsphase das Reaktionsmaterial (7, 12) durch Zugabe von Kohlen monoxid reduziert wird
- - und daß danach mit Erreichen eines vorgegebenen Beladungszustandes das reduzierte Reaktionsmaterial (7, 12) durch erhöhte Sauerstoffzufuhr wieder oxidiert wird.
- - That the reaction material ( 7 , 12 ) in the filter loading phase is converted into an oxide by residual oxygen in the exhaust gas,
- - That the reaction material ( 7 , 12 ) is then reduced by adding carbon monoxide towards the end of the filter loading phase
- - And that the reduced reaction material ( 7 , 12 ) is then oxidized again by increased oxygen supply when a predetermined loading state is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883828516 DE3828516C1 (en) | 1988-08-23 | 1988-08-23 | Soot particle filter regeneration - in which particles in filter for diesel engine exhaust fumes are burned off to regenerate filter by exothermic reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883828516 DE3828516C1 (en) | 1988-08-23 | 1988-08-23 | Soot particle filter regeneration - in which particles in filter for diesel engine exhaust fumes are burned off to regenerate filter by exothermic reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3828516C1 true DE3828516C1 (en) | 1989-03-23 |
Family
ID=6361376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19883828516 Expired DE3828516C1 (en) | 1988-08-23 | 1988-08-23 | Soot particle filter regeneration - in which particles in filter for diesel engine exhaust fumes are burned off to regenerate filter by exothermic reaction |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3828516C1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4031712A1 (en) * | 1990-10-06 | 1992-04-16 | Daimler Benz Ag | I.C. engine exhaust system - with soot burn-off filter contg. flow speed reducing quiescent chamber |
| WO1992017691A1 (en) * | 1991-04-05 | 1992-10-15 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate trap |
| DE4206226C1 (en) * | 1992-02-28 | 1993-01-28 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| WO1993023657A1 (en) * | 1992-05-11 | 1993-11-25 | Minnesota Mining And Manufacturing Company | Diesel particulate trap of perforated tubes having laterally offset cross-wound wraps of inorganic yarn |
| US5409669A (en) * | 1993-01-25 | 1995-04-25 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
| DE4431569A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | A soot filter is regenerated in a controlled and gentle fashion by combustion of the soot deposit |
| DE4130640C2 (en) * | 1991-09-14 | 2000-12-28 | Ald Vacuum Techn Ag | Device and method for cleaning a filter |
| DE20205520U1 (en) | 2002-04-09 | 2002-08-08 | Filterwerk Mann + Hummel GmbH, 71638 Ludwigsburg | Filters in a filter housing |
| WO2008009346A1 (en) * | 2006-07-15 | 2008-01-24 | Daimler Ag | Particle separator and method for regenerating a particle separator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117534A1 (en) * | 1983-02-25 | 1984-09-05 | Hitachi, Ltd. | Method for controlling emission of exhaust gas by a Diesel engine |
-
1988
- 1988-08-23 DE DE19883828516 patent/DE3828516C1/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117534A1 (en) * | 1983-02-25 | 1984-09-05 | Hitachi, Ltd. | Method for controlling emission of exhaust gas by a Diesel engine |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4031712A1 (en) * | 1990-10-06 | 1992-04-16 | Daimler Benz Ag | I.C. engine exhaust system - with soot burn-off filter contg. flow speed reducing quiescent chamber |
| WO1992017691A1 (en) * | 1991-04-05 | 1992-10-15 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate trap |
| DE4130640C2 (en) * | 1991-09-14 | 2000-12-28 | Ald Vacuum Techn Ag | Device and method for cleaning a filter |
| DE4206226C1 (en) * | 1992-02-28 | 1993-01-28 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| WO1993023657A1 (en) * | 1992-05-11 | 1993-11-25 | Minnesota Mining And Manufacturing Company | Diesel particulate trap of perforated tubes having laterally offset cross-wound wraps of inorganic yarn |
| US5409669A (en) * | 1993-01-25 | 1995-04-25 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
| DE4431569A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | A soot filter is regenerated in a controlled and gentle fashion by combustion of the soot deposit |
| DE4431569B4 (en) * | 1994-09-05 | 2004-04-08 | Deutz Ag | Process for the gentle regeneration of a soot filter |
| DE20205520U1 (en) | 2002-04-09 | 2002-08-08 | Filterwerk Mann + Hummel GmbH, 71638 Ludwigsburg | Filters in a filter housing |
| WO2008009346A1 (en) * | 2006-07-15 | 2008-01-24 | Daimler Ag | Particle separator and method for regenerating a particle separator |
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