DE102013210732A1 - Atomizing device for emitting a reducing agent in an exhaust passage of an internal combustion engine - Google Patents
Atomizing device for emitting a reducing agent in an exhaust passage of an internal combustion engine Download PDFInfo
- Publication number
- DE102013210732A1 DE102013210732A1 DE102013210732.3A DE102013210732A DE102013210732A1 DE 102013210732 A1 DE102013210732 A1 DE 102013210732A1 DE 102013210732 A DE102013210732 A DE 102013210732A DE 102013210732 A1 DE102013210732 A1 DE 102013210732A1
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- DE
- Germany
- Prior art keywords
- reducing agent
- atomizing device
- feed tube
- gas supply
- annular nozzle
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
- B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
- B05B7/32—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the fed liquid or other fluent material being under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0075—Nozzle arrangements in gas streams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
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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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
Abstract
Die Erfindung betrifft eine Zerstäubungsvorrichtung 10 zur Abgabe einer Reduktionsmittels 12 in den Abgaskanal 50 einer Brennkraftmaschine, sowie eine Abgasnachbehandlungsvorrichtung mit einer solchen Zerstäubungsvorrichtung. Die Zerstäubungsvorrichtung weist ein Zuführrohr 20 für das Reduktionsmittel 12 und eine Druckgasversorgung 30 auf, wobei an dem Zuführrohr 20 mindestens eine Spritzöffnung 25 ausgebildet ist. Die Druckgasversorgung umfasst eine ringförmige Düse 34, wobei ein Druckgas, insbesondere Druckluft, im Zufuhrkanal 32 der Druckgasversorgung 30 derart tangential in die ringförmige Düse 34 eingeleitet wird, dass sich in der ringförmigen Düse 34 eine Drallströmung ausbildet.The invention relates to an atomization device 10 for dispensing a reducing agent 12 into the exhaust gas duct 50 of an internal combustion engine, as well as an exhaust gas aftertreatment device with such an atomization device. The atomization device has a feed pipe 20 for the reducing agent 12 and a compressed gas supply 30, with at least one spray opening 25 being formed on the feed pipe 20. The pressurized gas supply comprises an annular nozzle 34, a pressurized gas, in particular compressed air, being introduced tangentially into the annular nozzle 34 in the supply channel 32 of the pressurized gas supply 30 such that a swirl flow is formed in the annular nozzle 34.
Description
Stand der TechnikState of the art
Die Erfindung betrifft eine Zerstäubungsvorrichtung zur Abgabe eines Reduktionsmittels in einen Abgaskanal einer Brennkraftmaschine sowie eine Abgasnachbehandlungsvorrichtung mit einer solchen ZerstäubungsvorrichtungThe invention relates to a sputtering device for dispensing a reducing agent in an exhaust passage of an internal combustion engine and an exhaust aftertreatment device with such a sputtering device
Aus dem Stand der Technik sind Abgasnachbehandlungsvorrichtungen bekannt, bei denen eine Flüssigkeit zur Unterstützung der Abgasnachbehandlung einer Brennkraftmaschine in ein Abgassystem der Brennkraftmaschine eindosiert wird. Aus der
Aus der
Offenbarungepiphany
Die erfindungsgemäße Zerstäubungsvorrichtung mit den in Anspruch 1 genannten Merkmalen und das erfindungsgemäße Abgasnachbehandlungssystem mit einer solchen Zerstäubungsvorrichtung bieten demgegenüber den Vorteil, dass sich in dem Zufuhrkanal der Druckgasversorgung eine Drallströmung ausbildet und somit eine schnellere und bessere Vermischung von dem Druckgas und dem Reduktionsmittel erzielt wird, wodurch die Effizienz der Abgasnachbehandlung verbessert wird und die Gefahr von Ablagerungen des Reduktionsmittels im Abgaskanal verringert wird. Darüber hinaus kann die Strecke zwischen Dosiervorrichtung und einer Abgasnachbehandlungseinrichtung, beispielsweise einem Katalysator zur selektiven Reduktion von Stickoxiden, verringert werden, was zum einen zu höheren Temperaturen am Katalysator und somit höheren Konvertierungsraten führt, und zum anderen die benötigten Bauraumlänge des Abgaskanals reduzieren kann, was die Kosten reduziert.The sputtering device according to the invention with the features mentioned in claim 1 and the exhaust aftertreatment system according to the invention with such a sputtering device offer the advantage that forms a swirl flow in the supply channel of the compressed gas supply and thus a faster and better mixing of the compressed gas and the reducing agent is achieved the efficiency of the exhaust aftertreatment is improved and the risk of deposits of the reducing agent in the exhaust passage is reduced. Moreover, the distance between metering device and an exhaust aftertreatment device, such as a catalyst for the selective reduction of nitrogen oxides, can be reduced, which leads to higher temperatures on the catalyst and thus higher conversion rates, and on the other hand can reduce the required installation space length of the exhaust gas channel, which Cost reduced.
Durch die in den abhängigen Ansprüchen angeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im unabhängigen Anspruch angegebenen Zerstäubungsvorrichtung möglich.The measures set forth in the dependent claims advantageous refinements and improvements of the independent claim sprayer are possible.
Eine erste vorteilhafte Weiterbildung besteht darin, dass eine Düsenöffnung der ringförmigen Düse koaxial zum Zuführrohr angeordnet ist. Durch eine koaxiale Anordnung der ringförmigen Düse um das Zuführrohr kann eine besonders gleichmäßige Anströmung der Spritzöffnungen erreicht werden, wodurch das Spray des Reduktionsmittels besonders gut von dem Druckgas mitgenommen wird. Besonders vorteilhaft ist dabei, wenn die Düsenöffnung der ringförmigen Düse auf die mindestens eine Spritzöffnung des Zuführrohrs gerichtet ist und somit das Druckgas zusätzlich beschleunigt wird, bevor sie auf das Spray des Reduktionsmittels trifft. Damit wird die Mitnahme und Vermischung des Reduktionsmittels mit dem Druckgas weiter verbessert.A first advantageous development is that a nozzle opening of the annular nozzle is arranged coaxially to the feed tube. By a coaxial arrangement of the annular nozzle to the feed tube, a particularly uniform flow of the injection openings can be achieved, whereby the spray of the reducing agent is particularly well entrained by the compressed gas. It is particularly advantageous if the nozzle opening of the annular nozzle is directed to the at least one injection opening of the feed tube and thus the compressed gas is additionally accelerated before it hits the spray of the reducing agent. Thus, the entrainment and mixing of the reducing agent with the compressed gas is further improved.
Alternativ oder zusätzlich ist vorgesehen, dass sich in Strömungsrichtung an die ringförmige Düse eine weitere Düse anschließt. Durch die weitere Düse wird die Strömungsgeschwindigkeit des Druckgases weiter erhöht, wodurch die Aufbereitung des Reduktionsmittels nach Austritt aus der mindestens einen Spritzöffnung des Zuführrohrs weiter verbessert wird. Besonders vorteilhaft ist dabei, wenn die Vermischung des Reduktionsmittels mit dem Gas aus der Druckgasversorgung innerhalb der weiteren Düse erfolgt. Durch die Vermischung von Druckgas und Reduktionsmittel in der weiteren Düse wird der Mischvorgang nicht durch die Abgasströmung beeinträchtigt und es kann eine entsprechend hohe Durchmischung erfolgen, bevor das Reduktionsmittel in den Abgaskanal eintritt.Alternatively or additionally, it is provided that adjoins an additional nozzle in the flow direction of the annular nozzle. By the further nozzle, the flow velocity of the compressed gas is further increased, whereby the treatment of the reducing agent after exiting the at least one injection opening of the feed pipe is further improved. It is particularly advantageous if the mixing of the reducing agent with the gas from the compressed gas supply takes place within the further nozzle. Due to the mixing of compressed gas and reducing agent in the other nozzle, the mixing process is not affected by the exhaust gas flow and it can be done a correspondingly high mixing before the reducing agent enters the exhaust passage.
Eine alternative, vorteilhafte Weiterbildung besteht darin, dass die Vermischung des Reduktionsmittels mit dem Gas aus der Druckgasversorgung nach Austritt aus der ringförmigen Düse in den Abgaskanal erfolgt. Dabei sorgen die Abgasströmung zusammen mit der Drallströmung des Druckgases aus der weiteren Düse für eine schnelle Vermischung von Reduktionsmittel und Abgas.An alternative, advantageous development is that the mixing of the reducing agent with the gas from the compressed gas supply takes place after exiting the annular nozzle in the exhaust duct. The exhaust gas flow together with the swirl flow of the compressed gas from the further nozzle ensure rapid mixing of reducing agent and exhaust gas.
Zusätzlich ist mit Vorteil vorgesehen, dass in dem Zuführrohr ein Element zur Drallerzeugung angeordnet ist. Damit kann in dem Zuführrohr eine Drallströmung des Reduktionsmittels erzeugt werden, wodurch die Vermischung von Reduktionsmittel mit dem Druckgas oder dem Abgas im Abgaskanal verbessert wird. Eine besonders einfache und kostengünstige Lösung für ein solches Element zur Drallerzeugung im Zuführrohr ist ein schraubenförmiger Körper, welcher in Strömungsrichtung des Reduktionsmittels vor der mindestens einen Spritzöffnung im Zuführrohr angeordnet ist.In addition, it is advantageously provided that an element for swirl generation is arranged in the feed tube. Thus, a swirl flow of the reducing agent can be generated in the feed tube, whereby the mixing of reducing agent with the compressed gas or the exhaust gas is improved in the exhaust passage. A particularly simple and inexpensive solution for such an element for generating swirl in the feed tube is a helical body, which is arranged in the flow direction of the reducing agent in front of the at least one injection opening in the feed tube.
Alternativ oder zusätzlich ist vorgesehen, dass das Element zur Drallerzeugung im Zuführrohr eine tangential in das Zuführrohr mündende Leitung für das Reduktionsmittel umfasst, wobei der Drall durch die Einleitung des Reduktionsmittels aus der Leitung in das Zuführrohr erzeugt wird.Alternatively or additionally, it is provided that the element for swirl generation in the feed tube a line for the reducing agent, which opens tangentially into the feed pipe, wherein the swirl is generated by the introduction of the reducing agent from the pipe into the feed pipe.
Eine weitere vorteilhafte Weiterbildung besteht darin, dass der Drall in der Drallströmung im Zuführrohr umgekehrt zu der Drallstörmung der Druckluft in der Druckgasversorgung ausgebildet ist. Durch zwei unterschiedlich orientierte Drallströmungen ist die Relativgeschwindigkeit zwischen dem Reduktionsmittel und der Druckluft besonders hoch, wodurch die Vermischung von Reduktionsmittel und Druckluft weiter verbessert wird.A further advantageous development is that the swirl in the swirl flow in the feed tube is formed inversely to the swirling of the compressed air in the compressed gas supply. By two differently oriented swirl flows, the relative speed between the reducing agent and the compressed air is particularly high, whereby the mixing of reducing agent and compressed air is further improved.
Zeichnungendrawings
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Kurze Beschreibung der AusführungsbeispieleShort description of the embodiments
In
In
Soll zur Nachbehandlung von Abgasen der Brennkraftmaschine das Reduktionsmittel
In
Zur Eindosierung von Reduktionsmittel
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 19946901 [0002] DE 19946901 [0002]
- DE 102011003356 [0003] DE 102011003356 [0003]
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102013210732.3A DE102013210732A1 (en) | 2013-06-10 | 2013-06-10 | Atomizing device for emitting a reducing agent in an exhaust passage of an internal combustion engine |
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DE102013210732.3A DE102013210732A1 (en) | 2013-06-10 | 2013-06-10 | Atomizing device for emitting a reducing agent in an exhaust passage of an internal combustion engine |
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DE102013210732A1 true DE102013210732A1 (en) | 2014-12-24 |
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DE102013210732.3A Withdrawn DE102013210732A1 (en) | 2013-06-10 | 2013-06-10 | Atomizing device for emitting a reducing agent in an exhaust passage of an internal combustion engine |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107376621A (en) * | 2017-08-15 | 2017-11-24 | 深圳市特种设备安全检验研究院 | Denitrogenation method and system in biomass Industrial Boiler stove |
GB2594093A (en) * | 2020-04-17 | 2021-10-20 | Delphi Tech Ip Ltd | An exhaust gas treatment system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19946901A1 (en) | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Device for supplying a flowing gas with a reactant |
DE102011003356A1 (en) | 2011-01-31 | 2012-08-02 | Robert Bosch Gmbh | Apparatus for delivering reducing agent into exhaust gas passage of internal combustion engine, has gas blowing element that blows out gas to deflect reducing agent introduced from spray opening toward central axis of exhaust gas passage |
-
2013
- 2013-06-10 DE DE102013210732.3A patent/DE102013210732A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19946901A1 (en) | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Device for supplying a flowing gas with a reactant |
DE102011003356A1 (en) | 2011-01-31 | 2012-08-02 | Robert Bosch Gmbh | Apparatus for delivering reducing agent into exhaust gas passage of internal combustion engine, has gas blowing element that blows out gas to deflect reducing agent introduced from spray opening toward central axis of exhaust gas passage |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107376621A (en) * | 2017-08-15 | 2017-11-24 | 深圳市特种设备安全检验研究院 | Denitrogenation method and system in biomass Industrial Boiler stove |
GB2594093A (en) * | 2020-04-17 | 2021-10-20 | Delphi Tech Ip Ltd | An exhaust gas treatment system |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |