DE102015005689B3 - mixing device - Google Patents
mixing device Download PDFInfo
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- DE102015005689B3 DE102015005689B3 DE102015005689.1A DE102015005689A DE102015005689B3 DE 102015005689 B3 DE102015005689 B3 DE 102015005689B3 DE 102015005689 A DE102015005689 A DE 102015005689A DE 102015005689 B3 DE102015005689 B3 DE 102015005689B3
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- mixing device
- axial end
- exhaust gas
- flow
- outlet pipe
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- 239000003638 chemical reducing agent Substances 0.000 description 17
- 239000000203 mixture Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
- B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
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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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
- B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
- B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
- B01F25/4233—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using plates with holes, the holes being displaced from one plate to the next one to force the flow to make a bending movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
- B01F25/431971—Mounted on the wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
- B01F25/431973—Mounted on a support member extending transversally through the mixing tube
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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
- F01N3/24—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
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2240/20—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 flow director or deflector
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Die Erfindung betrifft eine Mischeinrichtung (3) umfassend ein Gehäuse (4) mit einem ersten axialen Endabschnitt (5) sowie einem zweiten axialen Endabschnitt (6), der dem ersten axialen Endabschnitt (5) gegenüberliegt. Der erste axiale Endabschnitt (5) weist eine exzentrische Öffnung (7) auf, durch die ein Ende (8) eines Einlassrohres (9) in die Mischeinrichtung (3) hineinragt, wobei durch die exzentrische Öffnung (7) ein Abgasmassenstrom in die Mischeinrichtung (3) hineinströmen kann. Der zweite axiale Endabschnitt (6) weist eine Öffnung (10) auf, aus der der Abgasmassenstrom aus der Mischeinrichtung (3) herausströmen kann. Erfindungsgemäß ragt durch die Öffnung (10) des zweiten axialen Endabschnitts (6) ein Ende (11) eines Auslassrohres (12) in die Mischeinrichtung (3) hinein, wobei sich das Ende (8) des Einlassrohres (9) und das Ende (11) des Auslassrohres (12) longitudinal in einem Bereich (14) überlappen. Der Abgasmassenstrom kann in einer Hauptströmungsrichtung (P1) sowohl in die Mischeinrichtung (3) hineinströmen als auch aus der Mischeinrichtung (3) herausströmen.The invention relates to a mixing device (3) comprising a housing (4) having a first axial end section (5) and a second axial end section (6) which lies opposite the first axial end section (5). The first axial end section (5) has an eccentric opening (7) through which one end (8) of an inlet pipe (9) projects into the mixing device (3), an exhaust gas mass flow through the eccentric opening (7) into the mixing device (FIG. 3) can flow. The second axial end section (6) has an opening (10) from which the exhaust gas mass flow can flow out of the mixing device (3). According to the invention, an end (11) of an outlet tube (12) projects into the mixing device (3) through the opening (10) of the second axial end section (6), the end (8) of the inlet tube (9) and the end (11 ) of the outlet tube (12) overlap longitudinally in a region (14). The exhaust gas mass flow can flow into the mixing device (3) in a main flow direction (P1) as well as out of the mixing device (3).
Description
Technisches GebietTechnical area
Die Erfindung betrifft eine Mischeinrichtung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a mixing device according to the preamble of claim 1.
In Abgasanlagen angeordnete Mischeinrichtungen dienen zur Vermischung von flüssigem Reduktionsmittel, beispielsweise eine Harnstoff-Wasser-Lösung, im Abgasmassenstrom von Verbrennungskraftmaschinen mit SCR-Abgasnachbehandlungssystemen (SCR engl. Abkürzung für selective catalytic reduction). Diese haben die Aufgabe, das über einen Injektor zugeführte flüssige Reduktionsmittel möglichst homogen in dem Abgasmassenstrom zu verteilen.Mixing devices arranged in exhaust systems serve to mix liquid reducing agent, for example a urea-water solution, in the exhaust gas mass flow of internal combustion engines with SCR exhaust gas aftertreatment systems (SCR). These have the task of distributing the supplied via an injector liquid reducing agent as homogeneously as possible in the exhaust gas mass flow.
Durch die Erzeugung eines charakteristischen Strömungsfeldes werden der Transport und das Verhalten des flüssigen und gasförmigen Reduktionsmittels in der Strömung beeinflusst.The generation of a characteristic flow field influences the transport and behavior of the liquid and gaseous reducing agent in the flow.
Stand der TechnikState of the art
Aus der
Mischeinrichtungen, die zur Verdunstung und Vermischung von flüssigem Reduktionsmittel eingesetzt werden, verursachen teilweise einen hohen Abgasgegendruck bei einer schlechten Mischqualität, die vom Betriebspunkt abhängig ist. Der Zielkonflikt zwischen hoher Mischqualität und geringem Abgasgegendruck ist oftmals nicht im gesamten Motorkennfeld gelöst.Some of the mixing equipment used to evaporate and mix liquid reductant cause high exhaust backpressure with poor mixing quality depending on the operating point. The conflict of objectives between high mixing quality and low exhaust gas back pressure is often not solved in the entire engine map.
Aufgabe der ErfindungObject of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine Mischeinrichtung bereitzustellen, welche eine hohe Mischqualität bei gleichzeitig geringem Abgasgegendruck sowie eine kompakte Bauform gewährleistet.The invention has for its object to provide a mixing device, which ensures a high mixing quality with low exhaust back pressure and a compact design.
Lösung der AufgabeSolution of the task
Die Erfindung wird durch eine Mischeinrichtung gemäß Anspruch 1 gelöst.The invention is solved by a mixing device according to claim 1.
Vorteile der ErfindungAdvantages of the invention
Mittels der erfindungsgemäßen Mischeinrichtung wird die Hauptströmungsrichtung des Abgasmassenstroms beim Hinein- und Herausströmen beibehalten.By means of the mixing device according to the invention, the main flow direction of the exhaust gas mass flow is maintained when flowing in and out.
Weiterhin wird in der Mischeinrichtung die Strömungsrichtung derart umgelenkt, dass der Abgasmassenstrom zeitweilig entgegensetzt zu der Hauptströmungsrichtung strömt.Furthermore, in the mixing device, the flow direction is deflected such that the exhaust gas mass flow temporarily flows opposite to the main flow direction.
Die Änderung der Hauptströmungsrichtung in der Mischeinrichtung wird durch eine longitudinale Überlappung des Einlass- und des Auslassrohres, d. h. in ihrer jeweiligen Längserstreckung überlappen ein Ende des Einlassrohres und ein Ende des Auslassrohres in einem Bereich, erzielt. Der Bereich der Überlappung weist einen Wert größer „0” auf. Hierdurch wird bezogen auf die Distanz der Hauptströmungsrichtung die Mischstrecke verlängert, eine gute Verteilung des Reduktionsmittels bei einem geringen Abgasgegendruck erzielt, sowie das zeitlich schnelle Anspringverhalten (engl. light-off) der stromabwärts angeordneten Abgasnachbehandlungseinrichtung verbessert. Zusätzlich weist die Mischeinrichtung einen kompakten Aufbau auf. In der erfindungsgemäßen Mischeinrichtung kann ein zusätzliches Mischelement entfallen, so dass der Abgasgegendruck reduziert wird.The change of the main flow direction in the mixer is caused by a longitudinal overlap of the inlet and outlet tubes, i. H. in their respective longitudinal extent, one end of the inlet tube and one end of the outlet tube overlap in a range achieved. The area of the overlap has a value greater than "0". In this way, based on the distance of the main flow direction, the mixing section is lengthened, a good distribution of the reducing agent is achieved with a low exhaust backpressure, and the timely light-off behavior of the downstream exhaust gas aftertreatment device is improved. In addition, the mixing device has a compact construction. In the mixing device according to the invention, an additional mixing element can be omitted, so that the exhaust back pressure is reduced.
In einer vorteilhaften Ausführungsform weist die Mischeinrichtung einen Injektor auf. Der Injektor ist derart angeordnet, dass das zugeführte Reduktionsmittel dem aus dem Ende des Einlassrohres in die Mischeinrichtung hineinströmenden Abgasmassenstrom zugeführt wird. Mit dem Begriff „Reduktionsmittel” wird im engeren Sinne erst die bereits aufbereitete Harnstoff-Wasser-Lösung, d. h. Ammoniak, bezeichnet. Mittels des Injektors wird somit eine Harnstoff-Wasser-Lösung eingedüst.In an advantageous embodiment, the mixing device has an injector. The injector is arranged such that the supplied reducing agent is supplied to the exhaust gas mass flow flowing into the mixing device from the end of the inlet pipe. The term "reducing agent" in the narrower sense only the already prepared urea-water solution, d. H. Ammonia, called. By means of the injector thus a urea-water solution is injected.
Weiterhin gibt es Anwendungen, bei denen Ammoniak direkt gasförmig dem Abgasmassenstrom zugeführt wird. Diese Variante wird im Sinne der Erfindung dem Begriff „Reduktionsmittel” subsumiert. Furthermore, there are applications in which ammonia is fed directly to the exhaust gas mass flow in gaseous form. This variant is subsumed within the meaning of the invention the term "reducing agent".
Weiterhin kann das Reduktionsmittel in einem definierten Winkel in die Mischeinrichtung einströmen. Der Winkel kann abhängig von den geometrischen Ausbildungen der Mischeinrichtung, insbesondere des Auslassrohres, gewählt werden, um die gute Vermischung zu erzielen.Furthermore, the reducing agent can flow into the mixing device at a defined angle. The angle can be selected depending on the geometric configurations of the mixing device, in particular of the outlet pipe, in order to achieve good mixing.
In einer weiteren vorteilhaften Ausführungsform ist in dem Gehäuse der Mischeinrichtung stromabwärts von dem Einlassrohr ein Strömungsaufteilungselement angeordnet. Das Strömungsaufteilungselement kann derart angeordnet sein, dass der Abgasmassenstrom und das Reduktionsmittel gleichmäßig in zwei gleichgroße Massenströme aufgeteilt werden.In a further advantageous embodiment, a flow divider element is arranged in the housing of the mixing device downstream of the inlet tube. The flow dividing element can be arranged such that the exhaust gas mass flow and the reducing agent are divided equally into two equal mass flows.
In einer weiteren vorteilhaften Ausführungsform ist an dem Innenumfang des Gehäuses mindestens ein Leitelement angeordnet. Mittels des Leitelements können die Strömung und die Vermischung beeinflusst werden.In a further advantageous embodiment, at least one guide element is arranged on the inner circumference of the housing. By means of the guide element, the flow and the mixing can be influenced.
In einer weiteren vorteilhaften Ausführungsform ist an dem Außenumfang des Auslassrohres mindestens ein Leitelement angeordnet. Mittels des Leitelements können die Strömung und die Vermischung beeinflusst werden.In a further advantageous embodiment, at least one guide element is arranged on the outer circumference of the outlet tube. By means of the guide element, the flow and the mixing can be influenced.
In einer weiteren vorteilhaften Ausführungsform weist das in das Gehäuse hineinragende Auslassrohr in der Hauptströmungsrichtung des Abgasmassenstromes eine Aufweitung von einem ersten Querschnitt hin zu einem zweiten Querschnitt auf. Die Aufweitung kann beispielsweise linear, progressiv, degressiv, stetig oder unstetig sein. Mittels der Aufweitung wird einerseits die Strömungsgeschwindigkeit des durch das Auslassrohr herausströmenden Abgasmassenstromes und der Abgasgegendruck reduziert, und andererseits das auf die Außenseite der Aufweitung treffende Reduktionsmittel in kleinere Bestandteile aufgeteilt und in unterschiedliche Richtungen verteilt.In a further advantageous embodiment, the outlet pipe projecting into the housing has a widening from a first cross section through to a second cross section in the main flow direction of the exhaust gas mass flow. The expansion may be, for example, linear, progressive, degressive, continuous or unsteady. By means of the expansion, on the one hand, the flow velocity of the exhaust gas mass flow flowing out through the outlet pipe and the exhaust backpressure are reduced, and on the other hand, the reducing agent striking the outside of the expansion is divided into smaller components and distributed in different directions.
In einer weiteren vorteilhaften Ausführungsform ist das Einlassrohr um einen Abstand von dem Innenumfang des Gehäuses entfernt.In a further advantageous embodiment, the inlet tube is at a distance from the inner circumference of the housing.
Weiterhin besteht die Möglichkeit, dass der Abstand den Wert „0” aufweist, so dass das Einlassrohr an das Gehäuse angrenzt.Furthermore, there is the possibility that the distance has the value "0", so that the inlet tube is adjacent to the housing.
In einer weiteren vorteilhaften Ausführungsform ist das Einlassrohr in dem Bereich der Überlappung um einen Abstand von dem Ende des Auslassrohres entfernt.In a further advantageous embodiment, the inlet tube is located in the region of the overlap by a distance from the end of the outlet tube.
Weiterhin besteht die Möglichkeit, dass in dem Bereich der Überlappung der Abstand den Wert „0” aufweist, so dass das Einlassrohr an das Auslassrohr angrenzt bzw. anliegt.Furthermore, there is the possibility that in the region of the overlap the distance has the value "0", so that the inlet tube adjoins the outlet tube.
In einer weiteren vorteilhaften Ausführungsform weist der erste axiale Endabschnitt mindestens eine kleine Öffnung auf. Die kleine Öffnung ist derart in dem ersten axialen Endabschnitt angeordnet, dass eine Blickdichtigkeit vorliegt. Mittels der kleinen Öffnung kann die Durchmischung verbessert werden.In a further advantageous embodiment, the first axial end section has at least one small opening. The small opening is arranged in the first axial end section in such a way that it is opaque. By means of the small opening, the mixing can be improved.
In einer weiteren vorteilhaften Ausführungsform weist das Auslassrohr mindestens eine kleine Öffnung auf. Mittels der kleinen Öffnung kann die Durchmischung verbessert werden.In a further advantageous embodiment, the outlet pipe has at least one small opening. By means of the small opening, the mixing can be improved.
Zeichnungendrawings
Es zeigen:Show it:
Ein Abgasmassenstrom kann in einer Hauptströmungsrichtung (Pfeil P1) aus einer ersten Abgasnachbehandlungseinrichtung
Stromabwärts von der ersten Abgasnachbehandlungseinrichtung
Die Mischeinrichtung
Der erste axiale Endabschnitt
Mittels einer exzentrischen Öffnung
Der Abgasmassenstrom kann in der Hauptströmungsrichtung (Pfeil P1) durch das Einlassrohr
Mittels einer Öffnung
Der Abgasmassenstrom kann in der Hauptströmungsrichtung (Pfeil P1) aus dem Auslassrohr
Stromabwärts von der Mischeinrichtung
In einem Bereich
Um in der Hauptströmungsrichtung (Pfeil P1) sowohl in die Mischeinrichtung
Hierdurch wird eine lange Mischstrecke in einer kompakten Anordnung erzielt.As a result, a long mixing distance is achieved in a compact arrangement.
Das Einlassrohr
Stromabwärts des Einlassrohres
Der Injektor
Mittels der Überlappung und der geometrischen Anordnung des Injektors
Ein Strömungsaufteilungselement
In dem in
Hierdurch kann die definierte Strömungsaufteilung verbessert werden.As a result, the defined flow distribution can be improved.
An dem zweiten axialen Endabschnitt
Eine weitere Umlenkung in Richtung der Hauptströmungsrichtung (Pfeil P4) erfolgt an dem ersten axialen Endabschnitt
Das in das Gehäuse
Sowohl an der Innenseite des Gehäuses
Der erste axiale Endabschnitt
Die kleinen Öffnungen sind in einem Bereich
Mittels der kleinen Öffnungen
Das Auslassrohr
In
In
Die Mischeinrichtung
In den gezeigten Ausführungsbeispielen sind die Achsen des Einlassrohres
Es besteht im Sinne der Erfindung auch die Möglichkeit, die Achse des Einlassrohres
Weiterhin können das Einlassrohr
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Abgasstrangexhaust gas line
- 22
- erste Abgasbehandlungseinrichtungfirst exhaust treatment device
- 33
- Mischeinrichtungmixing device
- 44
- Gehäusecasing
- 55
- erster axialer Endabschnittfirst axial end portion
- 66
- zweiter axialer Endabschnittsecond axial end portion
- 77
- Öffnungopening
- 88th
- EndeThe End
- 99
- Einlassrohrinlet pipe
- 1010
- Öffnungopening
- 1111
- EndeThe End
- 1212
- Auslassrohroutlet pipe
- 1313
- zweite Abgasbehandlungseinrichtungsecond exhaust treatment device
- 1414
- BereichArea
- 1515
- Abstanddistance
- 1616
- Abstanddistance
- 1717
- Injektorinjector
- 1818
- StrömungsaufteilungselementFlow separating element
- 19a19a
- Leitelementvane
- 19b19b
- Leitelementvane
- 2020
- kleine Öffnungsmall opening
- 2121
- BereichArea
- 2222
- kleine Öffnungsmall opening
- P1P1
- Pfeilarrow
- P2P2
- Pfeilarrow
- P3P3
- Pfeilarrow
- P4P4
- Pfeilarrow
- Q1Q1
- Querschnittcross-section
- Q2Q2
- Querschnittcross-section
- αα
- Winkelangle
Claims (10)
Priority Applications (2)
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DE102015005689.1A DE102015005689B3 (en) | 2015-05-06 | 2015-05-06 | mixing device |
PCT/DE2016/100194 WO2016177361A1 (en) | 2015-05-06 | 2016-04-26 | Mixing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015005689.1A DE102015005689B3 (en) | 2015-05-06 | 2015-05-06 | mixing device |
Publications (1)
Publication Number | Publication Date |
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DE102015005689B3 true DE102015005689B3 (en) | 2016-03-24 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102015005689.1A Active DE102015005689B3 (en) | 2015-05-06 | 2015-05-06 | mixing device |
Country Status (2)
Country | Link |
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DE (1) | DE102015005689B3 (en) |
WO (1) | WO2016177361A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018015148A1 (en) * | 2016-07-22 | 2018-01-25 | Robert Bosch Gmbh | Mixer device for an exhaust gas aftertreatment system of a motor vehicle, exhaust gas aftertreatment system, and motor vehicle |
DE102019101678A1 (en) * | 2019-01-24 | 2020-07-30 | Eberspächer Exhaust Technology GmbH & Co. KG | mixer |
DE102021109777A1 (en) | 2021-04-19 | 2022-10-20 | Purem GmbH | Exhaust/Reactant Mixing Assembly |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013205297A1 (en) * | 2012-03-26 | 2014-07-03 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Exhaust after-treatment system for an internal combustion engine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0113226D0 (en) * | 2001-06-01 | 2001-07-25 | Nelson Burgess Ltd | Catalytic converter |
JP4989062B2 (en) * | 2005-04-28 | 2012-08-01 | バブコック日立株式会社 | Fluid mixing device |
DE102012014334A1 (en) * | 2012-07-20 | 2014-05-15 | Man Truck & Bus Ag | Mixing device for aftertreatment of exhaust gases |
DE202014102872U1 (en) * | 2014-06-10 | 2014-07-09 | Tenneco Gmbh | exhaust mixer |
-
2015
- 2015-05-06 DE DE102015005689.1A patent/DE102015005689B3/en active Active
-
2016
- 2016-04-26 WO PCT/DE2016/100194 patent/WO2016177361A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013205297A1 (en) * | 2012-03-26 | 2014-07-03 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Exhaust after-treatment system for an internal combustion engine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018015148A1 (en) * | 2016-07-22 | 2018-01-25 | Robert Bosch Gmbh | Mixer device for an exhaust gas aftertreatment system of a motor vehicle, exhaust gas aftertreatment system, and motor vehicle |
DE102019101678A1 (en) * | 2019-01-24 | 2020-07-30 | Eberspächer Exhaust Technology GmbH & Co. KG | mixer |
US10920640B2 (en) | 2019-01-24 | 2021-02-16 | Eberspächer Exhaust Technology GmbH | Mixer |
DE102021109777A1 (en) | 2021-04-19 | 2022-10-20 | Purem GmbH | Exhaust/Reactant Mixing Assembly |
US11702974B2 (en) | 2021-04-19 | 2023-07-18 | Purem GmbH | Exhaust gas/reactant mixing device |
Also Published As
Publication number | Publication date |
---|---|
WO2016177361A1 (en) | 2016-11-10 |
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