DE102004056896A1 - Gasbeaufschlagungsvorrichtung - Google Patents
Gasbeaufschlagungsvorrichtung Download PDFInfo
- Publication number
- DE102004056896A1 DE102004056896A1 DE102004056896A DE102004056896A DE102004056896A1 DE 102004056896 A1 DE102004056896 A1 DE 102004056896A1 DE 102004056896 A DE102004056896 A DE 102004056896A DE 102004056896 A DE102004056896 A DE 102004056896A DE 102004056896 A1 DE102004056896 A1 DE 102004056896A1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- metering tube
- flow direction
- exhaust gas
- main flow
- 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.)
- Withdrawn
Links
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
- F01N3/08—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]
-
- 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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Es wird eine Vorrichtung zur Beaufschlagung eines in einem Gasrohr strömenden Gases, insbesondere eines Abgases, mit einem Reaktionsmittel vorgeschlagen, die ein mindestens eine Öffnung (50) aufweisendes Mittel zur Einbringung des Reaktionsmittels in das Gasrohr (37) umfasst, wobei die mindestens eine Öffnung derart ausgebildet ist, dass das Reaktionsmittel das Mittel zur Einbringung mit einer Geschwindigkeitskomponente verlassen kann, die der durch die Geometrie des Gasrohrs festgelegten Hauptströmungsrichtung (p) des Gases entgegengerichtet ist. Die Vorrichtung gewährleistet eine gute Gleichverteilung des Reaktionsmittels über den gesamten Rohrquerschnitt.The invention relates to a device for pressurizing a gas flowing in a gas pipe, in particular an exhaust gas, with a reaction medium comprising means for introducing the reaction medium into the gas pipe (37), the at least one opening being at least one opening (50) in that the reaction means can leave the means for introduction with a velocity component which is opposite to the main flow direction (p) of the gas defined by the geometry of the gas pipe. The device ensures a good uniform distribution of the reagent over the entire pipe cross-section.
Description
Stand der TechnikState of technology
Die Erfindung geht aus von einer Vorrichtung zur Beaufschlagung eines in einem Gasrohr strömenden Gases nach der Gattung des unabhängigen Anspruchs.The The invention is based on a device for applying a flowing in a gas pipe Gas according to the preamble of the independent claim.
Die Verminderung des Anteils von Stickoxiden im Abgas insbesondere einer selbstzündenden Brennkraftmaschine eines Lastkraftwagens beziehungsweise eines Nutzfahrzeugs geschieht beispielsweise über die Eindüsung einer Harnstoff-Wasser-Lösung im Rahmen einer Abgasnachbehandlungsanordnung unter Ausnutzung der sogenannten selektiven katalytischen Reduktion („SCR"-Verfahren, „SCR" = „selective catalytic reduction"). Dabei entsteht aus dem Harnstoff im heißen Abgas und gegebenenfalls unter Zuhilfenahme eines Hydrolyse-Katalysators Ammoniak, welcher in einem weiter stromab liegenden SCR-Katalysator mit den Stickoxiden zu Stickstoff und Wasser reagiert. Die Zudosierung der Harnstoff-Wasser-Lösung geschieht beispielsweise mit Luftunterstützung durch eine so genannte Gemischabgabevorrichtung, die in den Abgasstrom hineinragt.The Reduction of the proportion of nitrogen oxides in the exhaust gas in particular one self-igniting internal combustion engine a lorry or a commercial vehicle happens for example about the injection a urea-water solution in the Frame of an exhaust aftertreatment arrangement taking advantage of so-called selective catalytic reduction ("SCR" process, "SCR" = "selective catalytic reduction") from the urea in the hot Exhaust gas and optionally with the aid of a hydrolysis catalyst Ammonia, which in a downstream SCR catalyst reacts with the nitrogen oxides to nitrogen and water. The dosage the urea-water solution happens, for example, with air support by a so-called Mixture dispensing device, which projects into the exhaust gas stream.
Aus
der
Des
Weiteren ist bekannt (
Vorteile der ErfindungAdvantages of invention
Die erfindungsgemäße Gasbeaufschlagungsvorrichtung mit den kennzeichnenden Merkmalen des unabhängigen Anspruchs hat demgegenüber den Vorteil einer verbesserten Gleichverteilung des Reaktionsmittels, insbesondere einer Harnstoff-Wasser-Lösung, über den gesamten Querschnitt des Rohrs beziehungsweise Abgasrohrs. Dabei wird mit einfachen Mitteln eine gleichmäßige Verteilung sichergestellt, die im Falle eines Einsatzes einer Harnstoff-Wasser-Lösung bei einer Abgasnachbehandlungsanordnung auf der Grundlage der selektiven katalytischen Reduktion eine hohe Konvertierungsrate und damit Effizienz in der Reduktion von im Abgas insbesondere von Dieselbrennkraftmaschinen enthaltenen Stickoxiden gewährleistet.The Gas loading device according to the invention with the characterizing features of the independent claim has the other hand Advantage of improved uniform distribution of the reagent, in particular a urea-water solution over which entire cross section of the pipe or exhaust pipe. there is ensured by simple means a uniform distribution, in the case of use of a urea-water solution at an exhaust aftertreatment arrangement based on the selective catalytic reduction a high conversion rate and therefore efficiency in the reduction of contained in the exhaust gas in particular of diesel internal combustion engines Nitrogen oxides ensured.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im unabhängigen Anspruch angegebenen Gasbeaufschlagungsvorrichtung möglich. Besonders vorteilhaft ist hierbei, Bohrungen mit entsprechender Orientierung vorzusehen, weil dies eine sehr einfache, platzsparende und effiziente Art der Richtungsführung des Reaktionsmittels darstellt.By those in the dependent Claims listed measures are advantageous developments and improvements of the independent claim specified gas application device possible. Especially advantageous is here to provide holes with appropriate orientation, because this is a very simple, space efficient and efficient way of directional guidance represents the reaction agent.
Insbesondere vorteilhaft ist es hierbei, einen Bohrungswinkel in einem Bereich zwischen 110 und 130 Grad zu wählen, vorzugsweise zirka 120 Grad. Hierdurch hat das Reaktionsmittel einerseits eine Orientierung bei Verlassen des Einbringungsmittels, die eine Ausbreitung über den gesamten Abgasrohrquerschnitt ermöglicht, und andererseits aufgrund einer verlängerten Wegstrecke zu einem nachfolgend anordenbaren Katalysator genügend Zeit, sich mit dem Abgas zu vermischen, und auch genügend Zeit, gegebenenfalls chemisch zu reagieren (wie beispielsweise bei einer Harnstoff-Wasser-Lösung sich in Ammoniak umzuwandeln), um in ein chemische Form zu gelangen, die im Katalysator in gewünschter Weise eine Reaktion mit dem Gas bzw. Abgas durchläuft, insbesondere Stickoxid-reduzierend wirkt.Especially it is advantageous in this case, a bore angle in a range between 110 and 130 degrees, preferably about 120 degrees. As a result, the reagent has on the one hand an orientation when leaving the introduction means, the one Spread over allows the entire exhaust pipe cross-section, and on the other hand due an extended one Enough distance to a subsequently arranged catalyst, to mix with the exhaust gas, and also enough time, possibly chemically react (such as in a urea-water solution to convert into ammonia), to get into a chemical form in the catalyst in the desired manner undergoes a reaction with the gas or exhaust gas, in particular nitrogen oxide reducing acts.
Weitere Vorteile ergeben sich aus weiteren in den abhängigen Ansprüchen und in der Beschreibung genannten Merkmalen.Further Advantages result from further in the dependent claims and features mentioned in the description.
Zeichnungdrawing
Ausführungsbeispiele
der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung
näher erläutert. Es
zeigen
Beschreibung der Ausführungsbeispieledescription the embodiments
Über das
Zufuhrrohr kann Reduktionsmittel aus einem nicht dargestellten Reduktionsmittelspeicher
in den Abgasrohrabschnitt eingebracht werden. Als Reduktionsmittel
kommen neben Kohlenwasserstoffen, beispielsweise Dieselkraftstoffen
o. ä.,
insbesondere Harnstoff-Wasser-Lösungen
in Betracht, die beispielsweise über
eine Einspritzdüse
oder andere Dosiereinrichtungen, die beispielsweise eine Vermischung
des Reduktionsmittels mit Druckluft vorsehen, eingebracht werden
können.
Dabei tritt das Reduktionsmittel durch die Öffnungen
Aufgrund
des stromabwärtigen
Abschlusses des Dosierrohrs im Bereich
In
Die Prallscheibe erhöht den Abgasgegendruck aufgrund des kleinen Durchmessers im Vergleich zum Durchmesser des Abgasrohrs nur unwesentlich, kann aber dazu dienen, die Abgasströmung im Bereich der Dosierlöcher aufzustauen und abzulenken, um die Verwirbelung beziehungsweise Vermischung der Harnstoff-Wasser-Lösung mit dem Abgas weiter zu intensivieren beziehungsweise zu unterstützen.The Baffle plate increased the exhaust back pressure due to the small diameter in comparison to the diameter of the exhaust pipe only slightly, but can do so serve, the exhaust gas flow in the Range of metering holes accumulate and distract to the vortex respectively Mixing the urea-water solution with the exhaust gas continues to intensify or support.
Alternativ
kann die Prallscheibe den in
Claims (14)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004056896A DE102004056896A1 (en) | 2004-11-25 | 2004-11-25 | Gasbeaufschlagungsvorrichtung |
PCT/EP2005/054623 WO2006056499A1 (en) | 2004-11-25 | 2005-09-16 | Gas treatment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004056896A DE102004056896A1 (en) | 2004-11-25 | 2004-11-25 | Gasbeaufschlagungsvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004056896A1 true DE102004056896A1 (en) | 2006-06-01 |
Family
ID=35241012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004056896A Withdrawn DE102004056896A1 (en) | 2004-11-25 | 2004-11-25 | Gasbeaufschlagungsvorrichtung |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102004056896A1 (en) |
WO (1) | WO2006056499A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008058548A1 (en) * | 2006-11-16 | 2008-05-22 | Grundfos Nonox A/S | Nozzle and method for atomization of fluids |
FR2935756A1 (en) * | 2008-09-08 | 2010-03-12 | Renault Sas | Fuel vapor injection nozzle for fuel vaporizer in internal combustion engine, has deflector provided with shutters that define together projecting angular sector, where top of sector is directed opposite to fuel vapor injection direction |
US8313717B2 (en) | 2005-05-20 | 2012-11-20 | Grundfos Nonox A/S | Atomization of fluids by mutual impingement of fluid streams |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115111444A (en) * | 2021-03-19 | 2022-09-27 | 中国石油化工股份有限公司 | Plastic-lined pipeline branch pipe connecting structure |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4109305A1 (en) * | 1991-03-21 | 1992-09-24 | Siemens Ag | Reagent injection to process or flue gas stream - e.g. for ammonia addition in catalytic nitrogen oxide(s) redn. of stack gases |
EP0586912A3 (en) * | 1992-09-08 | 1994-11-30 | Man Nutzfahrzeuge Ag | Spray nozzle. |
US5992141A (en) * | 1996-04-02 | 1999-11-30 | Kleen Air Systems, Inc. | Ammonia injection in NOx control |
US6361754B1 (en) * | 1997-03-27 | 2002-03-26 | Clean Diesel Technologies, Inc. | Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction |
DE19726392A1 (en) | 1997-06-21 | 1998-12-24 | Bosch Gmbh Robert | Mixture dispenser |
US6293097B1 (en) * | 1999-08-16 | 2001-09-25 | Ford Global Technologies, Inc. | On-board reductant delivery system |
DE19946901A1 (en) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Device for supplying a flowing gas with a reactant |
DE10060808B4 (en) | 2000-12-07 | 2004-12-02 | Robert Bosch Gmbh | emission control system |
US6601385B2 (en) * | 2001-10-17 | 2003-08-05 | Fleetguard, Inc. | Impactor for selective catalytic reduction system |
-
2004
- 2004-11-25 DE DE102004056896A patent/DE102004056896A1/en not_active Withdrawn
-
2005
- 2005-09-16 WO PCT/EP2005/054623 patent/WO2006056499A1/en active Application Filing
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8313717B2 (en) | 2005-05-20 | 2012-11-20 | Grundfos Nonox A/S | Atomization of fluids by mutual impingement of fluid streams |
WO2008058548A1 (en) * | 2006-11-16 | 2008-05-22 | Grundfos Nonox A/S | Nozzle and method for atomization of fluids |
FR2935756A1 (en) * | 2008-09-08 | 2010-03-12 | Renault Sas | Fuel vapor injection nozzle for fuel vaporizer in internal combustion engine, has deflector provided with shutters that define together projecting angular sector, where top of sector is directed opposite to fuel vapor injection direction |
Also Published As
Publication number | Publication date |
---|---|
WO2006056499A1 (en) | 2006-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1969213B1 (en) | Fixture for mounting in an exhaust line of an internal combustion engine | |
DE10060808B4 (en) | emission control system | |
EP2687697B1 (en) | Mixing device for the aftertreatment of exhaust gases | |
DE102008009564B4 (en) | Exhaust after-treatment system for an internal combustion engine | |
EP2171229B1 (en) | Apparatus for the after-treatment of the exhaust gases of diesel engines | |
DE102011051875B4 (en) | DOSING MODULE FOR A VEHICLE EXHAUST TREATMENT SYSTEM | |
EP2161423B1 (en) | Exhaust gas facility for diesel vehicles with an SCR catalytic converter | |
DE102010014037A1 (en) | Reducing agent i.e. urea, decomposition system, has reducing agent injector coupled with exhaust chamber, where reducing agent injector is fixed in reducing agent injection connection part with exhaust gas in exhaust chamber | |
WO2018001789A1 (en) | Mixer device for an exhaust-gas aftertreatment system of a motor vehicle, exhaust-gas aftertreatment system, and motor vehicle | |
EP3553290B1 (en) | Gas/gas mixer for introducing gas into the waste gas flow of a combustion engine | |
WO2001023074A1 (en) | Device for impinging a flowing gas with a reactant | |
DE102016006606A1 (en) | exhaust manifold | |
EP2148053A2 (en) | Catalyst assembly for cleaning an exhaust gas flow | |
EP2570178B1 (en) | Mixing device | |
DE102012111335A1 (en) | Internal combustion engine, has mixing device comprising heating device formed by flow conducting surface that projects into concavely curved surface of mixing device, where concave surface forms separating edge at downstream end | |
DE19963394A1 (en) | Aerosol generator for exhaust processing in IC engines has secondary air supply elements for effective fluid-air-mixture generation and quicker aerosol transport | |
DE102019104772A1 (en) | Exhaust system | |
WO2006056499A1 (en) | Gas treatment device | |
DE102011120221A1 (en) | Mixer for exhaust system for internal combustion engine of motor vehicle, has tubular housing with inlet and outlet, where mixing elements are arranged in flow direction of exhaust gas at inner wall of housing | |
EP3050615A1 (en) | Flow unit, exhaust gas purifying device and method for an exhaust gas purifying device | |
DE102013200008A1 (en) | Metering module for compressed air assisted metering of e.g. aqueous urea solution into motor vehicle, has check valve with valve closing portion displaceably guided in guide region of valve main portion and opens into mixing chamber | |
EP2798167B1 (en) | Device for introducing a reductant | |
DE102011076467A1 (en) | Apparatus used for metering e.g. fuel into exhaust gas stream of internal combustion engine mounted in vehicle, has recessed grooves that are connected with inner wall of lance casing channels incorporated in swirl channels | |
DE102018202298A1 (en) | Exhaust gas aftertreatment device for metering in a liquid exhaust aftertreatment agent | |
EP3680462B1 (en) | Exhaust gas system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ON | Later submitted papers | ||
8139 | Disposal/non-payment of the annual fee |