WO2017063808A1 - Dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
WO2017063808A1
WO2017063808A1 PCT/EP2016/071654 EP2016071654W WO2017063808A1 WO 2017063808 A1 WO2017063808 A1 WO 2017063808A1 EP 2016071654 W EP2016071654 W EP 2016071654W WO 2017063808 A1 WO2017063808 A1 WO 2017063808A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
flow
exhaust
deflection
generating device
Prior art date
Application number
PCT/EP2016/071654
Other languages
German (de)
English (en)
Inventor
Matthias Kruse
Kamran Khani
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201680061856.7A priority Critical patent/CN108138631B/zh
Publication of WO2017063808A1 publication Critical patent/WO2017063808A1/fr

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]
    • 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
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
    • 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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • F01N2610/02—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
    • F01N2610/14—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

Definitions

  • the present invention relates to an apparatus for after-treatment of the exhaust gas of an internal combustion engine, comprising an exhaust gas line leading into the device, a reducing agent in the
  • the invention relates to the technical field of the aftertreatment of the exhaust gases of an internal combustion engine.
  • exhaust gas When burning fuel while supplying combustion air in an internal combustion engine, exhaust gas is produced which must be cleaned before leaving the exhaust gas line in order to comply with the environmental compatibility requirements of the internal combustion engine, for example designed as a self-igniting internal combustion engine and powered by diesel fuel.
  • Reducing agent is introduced into the exhaust gas, wherein the reducing agent causes desired chemical reactions in a subsequent catalyst.
  • Such a device is known from DE 100 60 808 AI.
  • Apparatus comprises an SCR catalyst for selective catalytic reduction, which is installed in an exhaust pipe of an internal combustion engine.
  • a reducing agent is introduced into the exhaust gas upstream of the SCR catalyst.
  • an exhaust mixing device which is installed in a separate housing.
  • the invention is based on the object, a device for
  • the exhaust gas mixing device is a swirl generating device, that the swirl generating device is inserted into a designed as a cup-shaped deflection exhaust gas routing device, and that in the deflection upstream of the swirl generating device, a flow guiding device is arranged.
  • the device downstream of the swirl generating device is designed so that an intense mixture of the reducing agent with the exhaust gas takes place.
  • a mixing tube is preferably arranged downstream of the swirl generating device.
  • the flow guiding device now causes the flow of the exhaust gas to be split so that the flow entering the mixing tube is the same.
  • the flow guidance device is a
  • Flow guiding device a division of the exhaust gas flow into at least two partial exhaust gas streams. These two partial exhaust gas streams flow around the
  • the flow guidance device has a triangular basic shape.
  • the triangular basic form of the Flow guiding device is particularly suitable, the desired
  • a tip of the triangular basic shape in the direction of the supplied exhaust gas stream is arranged in the preferably designed as a deflection exhaust gas guide device.
  • a retracted side is aligned with the swirl generating device.
  • the swirl generating device is aligned with the swirl generating device.
  • the flow guiding device has the sides connecting the opposing side walls of the exhaust gas guiding device. Such a configured flow guide device can be produced in the manufacture of the device without significant additional effort.
  • the material of the exhaust gas guide device as well as the material of the flow guide device is sheet metal.
  • the flow guide device is in the
  • Exhaust guiding device by a thermal bonding method, in particular soldering or welding einbaubar. This also achieves the exhaust-gas guiding device is stiffened by the flow-guiding device.
  • FIG. 2 shows a section through an exhaust gas routing device of the device with a flow guide device
  • Figure 3 is a perspective view of the in the field of
  • FIG. 1 shows a schematic longitudinal section through a device for the aftertreatment of the exhaust gases of an internal combustion engine.
  • Internal combustion engine which is for example a self-igniting powered with diesel fuel and combustion air engine, is about a
  • Injection system which is designed for example as a common rail injection system, supplied from a tank fuel, which is injected into a combustion chamber of the internal combustion engine. At the same time, combustion air is supplied and compressed into the combustion chamber via a charge air duct. In the operation of the internal combustion engine, the fuel burns with the combustion air to generate work and the burnt exhaust gas is discharged into an exhaust pipe 2.
  • the exhaust pipe 2 opens into a housing 1, which accommodates essential components of the device for the aftertreatment of the exhaust gases and is produced, for example, from a metallic material, for example sheet metal.
  • the housing 1 with the components for post-treatment of the exhaust gases will be explained in detail below.
  • a guided from the internal combustion engine through the exhaust pipe 2 exhaust gas stream 10 passes on the input side of the housing 1 in a diesel oxidation catalyst (DOC) 12 and flows through a particle filter below 5. Thereafter, the exhaust gas stream 10 passes to an exhaust gas routing device, which as a cup-shaped
  • Deflection 6 is formed. In the deflection 6 is the output side a
  • Flue gas mixing device installed in the form of a swirl generating device 8, which in turn is formed by turbine blades 9.
  • the swirl generating device 8 has the purpose of introducing the exhaust gas stream 10 centrally into a subsequent mixing tube 7, in which an intimate mixing of the exhaust gas flow 10 takes place with a metered by the injector 11 reducing agent.
  • a flow guidance device designed as a flow rectifier 4 is installed in the cup-shaped deflection 6 prior to entry into the swirl generating device 8.
  • the flow straightener 4 will be explained in detail below.
  • the exhaust gas stream 10 passes with the metered and mixed reducing agent via a further deflection means 17 in a catalyst, in particular an SCR catalyst 3.
  • a catalyst in particular an SCR catalyst 3.
  • SCR catalyst 3 is a selective catalytic reduction, before the exhaust stream 10 into the environment or Further
  • the exhaust mixing device designed as a swirl generating device 8 is arranged on the input side of the mixing tube 7.
  • the exhaust mixing device designed as a swirl generating device 8 is arranged on the input side of the mixing tube 7.
  • Swirl generating device 8 has a number of turbine blades 9, which are connected to the outer periphery directly or with the interposition of a support ring with the deflection 6.
  • the example, 12 turbine blades 9 are aligned at an angle of, for example, 45 ° to the flow direction of the exhaust gas and cause the twisting of the flowing through the mixing tube 7 exhaust stream 10th
  • the reducing agent which is, for example, an aqueous urea solution
  • Figure 2 shows a section through the deflection 6 with the built-in
  • the deflection 6 is reversely formed closing cylindrical and has in the lower circular arc-shaped portion a transition 13 to the particle filter 5 arranged in front.
  • the swirl generating device 8 is arranged with the injector 11.
  • Between the transition 13 and the swirl generating device 8 of the flow straightener 4 is arranged, which has a triangular basic shape with retracted sides 14a, 14b, 14c.
  • the three tips 15a, 15b, 15c of the triangular basic shape of the flow rectifier 4 are rounded.
  • the flow straightener 4 is arranged in the deflection device 6 such that the tip 15a points in the direction of the transition 13 and the side 14b between the tips 15b and 15c is aligned with the spin-generating device 8.
  • the projected length of the side 15b corresponds approximately to the diameter of the swirl generating device 8 or is possibly also larger.
  • the flow rectifier 4 causes a division of the exhaust gas stream 10 into two partial exhaust gas streams 16 a, 16 b, which are divided so that the penetrating through the swirl generating device 8 in the mixing tube 7 flow is rectified. Contrary to the triangular basic form of the
  • Flow rectifier 4 also have a different configuration and / or of (several) individual components, for example in the form of
  • FIG. 3 shows a perspective view in the region of FIG
  • Swirl generating device 8 open deflection 6 with the subsequent mixing tube 7, the deflection device 17 and the SCR catalyst 3.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne, comprenant une conduite de gaz d'échappement (2) introduisant un flux de gaz d'échappement (10) dans le dispositif, un injecteur (11) introduisant un agent réducteur dans le dispositif en amont d'un catalyseur et un dispositif de mélange de gaz d'échappement disposé en amont de l'agent réducteur introduit. L'invention vise à fournir un dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne qui est plus efficace que les dispositifs connus tout en présentant une construction simple. À cet effet, le dispositif de mélange de gaz d'échappement est un dispositif de génération de turbulence (8), le dispositif de génération de turbulence (8) est inséré dans un élément de déviation (6) en forme de pot, et un dispositif de guidage d'écoulement sous la forme d'un redresseur d'écoulement (4) est disposé dans l'élément de déviation (6) en amont du dispositif de génération de turbulence (8).
PCT/EP2016/071654 2015-10-14 2016-09-14 Dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne WO2017063808A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680061856.7A CN108138631B (zh) 2015-10-14 2016-09-14 用于内燃机废气后处理的设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015219962.2A DE102015219962A1 (de) 2015-10-14 2015-10-14 Vorrichtung zur Nachbehandlung des Abgases einer Brennkraftmaschine
DE102015219962.2 2015-10-14

Publications (1)

Publication Number Publication Date
WO2017063808A1 true WO2017063808A1 (fr) 2017-04-20

Family

ID=56920730

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/071654 WO2017063808A1 (fr) 2015-10-14 2016-09-14 Dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne

Country Status (3)

Country Link
CN (1) CN108138631B (fr)
DE (1) DE102015219962A1 (fr)
WO (1) WO2017063808A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060808A1 (de) * 2000-12-07 2002-07-04 Bosch Gmbh Robert Abgasreinigungsanlage
JP2008309000A (ja) * 2007-06-12 2008-12-25 Nissan Diesel Motor Co Ltd 内燃機関の排気浄化装置
EP2192284A1 (fr) * 2007-09-20 2010-06-02 Hino Motors Ltd. Appareil de purification d'échappement
WO2012047159A1 (fr) * 2010-10-06 2012-04-12 Scania Cv Ab (Publ) Agencement pour introduire un milieu liquide dans les gaz d'échappement provenant d'un moteur à combustion
US20140325967A1 (en) * 2011-12-28 2014-11-06 Hino Motors, Ltd. Exhaust gas purification device
DE102014104224A1 (de) * 2014-03-26 2015-10-01 Friedrich Boysen Gmbh & Co. Kg Abgasanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012021017A1 (de) * 2012-10-26 2014-04-30 Daimler Ag Abgassystem

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060808A1 (de) * 2000-12-07 2002-07-04 Bosch Gmbh Robert Abgasreinigungsanlage
JP2008309000A (ja) * 2007-06-12 2008-12-25 Nissan Diesel Motor Co Ltd 内燃機関の排気浄化装置
EP2192284A1 (fr) * 2007-09-20 2010-06-02 Hino Motors Ltd. Appareil de purification d'échappement
WO2012047159A1 (fr) * 2010-10-06 2012-04-12 Scania Cv Ab (Publ) Agencement pour introduire un milieu liquide dans les gaz d'échappement provenant d'un moteur à combustion
US20140325967A1 (en) * 2011-12-28 2014-11-06 Hino Motors, Ltd. Exhaust gas purification device
DE102014104224A1 (de) * 2014-03-26 2015-10-01 Friedrich Boysen Gmbh & Co. Kg Abgasanlage

Also Published As

Publication number Publication date
CN108138631B (zh) 2021-01-26
DE102015219962A1 (de) 2017-04-20
CN108138631A (zh) 2018-06-08

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