EP2716884A1 - Dispositif de purification des gaz d'échappement pour moteur à combustion interne - Google Patents

Dispositif de purification des gaz d'échappement pour moteur à combustion interne Download PDF

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Publication number
EP2716884A1
EP2716884A1 EP11866883.9A EP11866883A EP2716884A1 EP 2716884 A1 EP2716884 A1 EP 2716884A1 EP 11866883 A EP11866883 A EP 11866883A EP 2716884 A1 EP2716884 A1 EP 2716884A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
gas flow
forming portion
flow forming
passage
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Withdrawn
Application number
EP11866883.9A
Other languages
German (de)
English (en)
Other versions
EP2716884A4 (fr
Inventor
Takanori Nakano
Masaaki Sato
Tomihisa Oda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP2716884A1 publication Critical patent/EP2716884A1/fr
Publication of EP2716884A4 publication Critical patent/EP2716884A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B01F25/313—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
    • 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
    • B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
    • 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
    • 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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]

Definitions

  • the first gas flow forming portion is provided at a central portion of the dispersing unit, and the second gas flow forming portion is provided outside the central portion independently from the first gas flow forming portion.
  • the resistance of the exhaust gas is increased in the first gas flow forming portion as compared with the second gas flow forming portion. Therefore, the velocity of the second gas flow is faster than the velocity of the first gas flow. Accordingly, the first gas flow is pushed and returned by the second gas flow toward the central axis of the exhaust gas passage from the side of the wall surface of the exhaust gas passage. Therefore, it is possible to further suppress the first gas flow from being directed to the wall surface of the exhaust gas passage. Accordingly, it is possible to further suppress the addition agent from being deviated in the vicinity of the wall surface of the exhaust gas passage.
  • the disperser 5 is provided with a cylinder portion 51 which is formed so that the outer diameter is smaller than the inner diameter of the exhaust gas passage 2 and the hollow cylindrical shape coaxial with the central axis of the exhaust gas passage 2 is provided.
  • a plurality of plates 52 having the same shape extend from the inner circumferential surface of the cylinder portion 51 toward the central axis.
  • the plurality of plates 52 are arranged radially at equal angles about the center of the central axis of the cylinder portion 51.
  • the central axes of the respective plates 52 which extend from the inner circumferential surface of the cylinder portion 51 to arrive at the forward ends of the plates 52, are perpendicular to the central axis direction of the cylinder portion 51.
  • the length which ranges from the inner circumferential surface of the cylinder portion 51 to the forward end of the plate 52, is smaller than the radius of the cylinder portion 51, and the respective plates 52 are provided so that they are not brought in contact with each other.
  • Each of the plates 52 is inclined by a predetermined angle with respect to the central axis of the cylinder portion 51. Further, a gap is provided between the plate 52 and the plate 52 so that the exhaust gas can flow.
  • the plates 52 are arranged as described above, and thus the exhaust gas swirls about the center of the central axis of the cylinder portion 51.
  • the flow direction of the exhaust gas is changed by the plurality of plates 52, and the exhaust gas swirls about the center of the central axis of the exhaust gas passage 2. Accordingly, when the addition agent is supplied toward the first gas flow forming portion 54, then the addition agent and the exhaust gas swirl, and thus the addition agent is dispersed in the first gas flow.
  • the second gas flow is absent, it is feared that the addition agent contained in the first gas flow may be deviated by the centrifugal force on the side of the wall surface of the exhaust gas passage 2.
  • the first gas flow forming portion 54 and the second gas flow forming portion 55 are formed so that passage for the exhaust gas, which is formed in the first gas flow forming portion 54, has the cross-sectional area that is larger than the cross-sectional area of the passage for the exhaust gas which is formed in the second gas flow forming portion 55. Accordingly, the resistance of the exhaust gas is large in the first gas flow forming portion 54 as compared with the second gas flow forming portion 55. That is, the first gas flow forming portion 54 and the second gas flow forming portion 55 are formed so that the resistance, which is brought about when the exhaust gas passes through the first gas flow forming portion 54, is larger than the resistance which is brought about when the exhaust gas passes through the second gas flow forming portion 55.
  • the velocity of the second gas flow is faster than the velocity of the first gas flow. Accordingly, the first gas flow is pushed and returned by the second gas flow from the side of the wall surface of the exhaust gas passage 2 to the side of the central axis of the exhaust gas passage 2. Therefore, it is possible to suppress the addition agent from being deviated on the side of the wall surface of the exhaust gas passage 2.
  • the optimum shapes of the first gas flow forming portion 54 and the second gas flow forming portion 55 can be determined, for example, by an experiment.

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)
EP11866883.9A 2011-06-02 2011-06-02 Dispositif de purification des gaz d'échappement pour moteur à combustion interne Withdrawn EP2716884A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/062704 WO2012164722A1 (fr) 2011-06-02 2011-06-02 Dispositif de purification des gaz d'échappement pour moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2716884A1 true EP2716884A1 (fr) 2014-04-09
EP2716884A4 EP2716884A4 (fr) 2014-12-03

Family

ID=47258607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11866883.9A Withdrawn EP2716884A4 (fr) 2011-06-02 2011-06-02 Dispositif de purification des gaz d'échappement pour moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP2716884A4 (fr)
JP (1) JPWO2012164722A1 (fr)
WO (1) WO2012164722A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105545438A (zh) * 2014-10-22 2016-05-04 丰田自动车株式会社 分散板和内燃机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6077963B2 (ja) * 2013-07-31 2017-02-08 カルソニックカンセイ株式会社 排気浄化装置
JP6046568B2 (ja) * 2013-07-31 2016-12-14 カルソニックカンセイ株式会社 排気浄化装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1712751A2 (fr) * 2005-04-15 2006-10-18 Iveco S.p.A. Mixeur statique
DE102006024199A1 (de) * 2006-05-23 2007-11-29 Arvinmeritor Emissions Technologies Gmbh Verwirbelungselement für Abgasanlage
JP2008280999A (ja) * 2007-05-08 2008-11-20 Friedrich Boysen Gmbh & Co Kg 内燃機関の排気ガスシステムに流動可能な添加物を配給する装置
DE102008017395A1 (de) * 2008-04-05 2009-10-08 J. Eberspächer GmbH & Co. KG Misch- und/oder Verdampfungseinrichtung und zugehöriges Herstellungsverfahren
DE102008029110A1 (de) * 2008-06-20 2009-12-24 J. Eberspächer GmbH & Co. KG Misch- und/oder Verdampfungseinrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005344597A (ja) * 2004-06-02 2005-12-15 Hitachi Ltd エンジン用排気ガス処理装置
JP2008128093A (ja) * 2006-11-21 2008-06-05 Mitsubishi Fuso Truck & Bus Corp 内燃機関の排気浄化装置
JP2008144644A (ja) 2006-12-08 2008-06-26 Mitsubishi Fuso Truck & Bus Corp 内燃機関の排気浄化装置
DE102007019878A1 (de) * 2007-04-25 2008-11-06 J. Eberspächer GmbH & Co. KG Misch- und/oder Verdampfungseinrichtung und zugehöriges Herstellungsverfahren
JP2008280882A (ja) * 2007-05-09 2008-11-20 Toyota Motor Corp 内燃機関の排気浄化装置
JP2009108726A (ja) * 2007-10-29 2009-05-21 Mitsubishi Heavy Ind Ltd 排ガス浄化装置
JP2009127451A (ja) * 2007-11-20 2009-06-11 Osaka Gas Co Ltd 流体混合装置及び脱硝装置
JP5066435B2 (ja) * 2007-12-14 2012-11-07 東京濾器株式会社 ディーゼルエンジン用の排ガス浄化装置
US8141353B2 (en) * 2008-04-25 2012-03-27 Tenneco Automotive Operating Company Inc. Exhaust gas additive/treatment system and mixer for use therein

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1712751A2 (fr) * 2005-04-15 2006-10-18 Iveco S.p.A. Mixeur statique
DE102006024199A1 (de) * 2006-05-23 2007-11-29 Arvinmeritor Emissions Technologies Gmbh Verwirbelungselement für Abgasanlage
JP2008280999A (ja) * 2007-05-08 2008-11-20 Friedrich Boysen Gmbh & Co Kg 内燃機関の排気ガスシステムに流動可能な添加物を配給する装置
DE102008017395A1 (de) * 2008-04-05 2009-10-08 J. Eberspächer GmbH & Co. KG Misch- und/oder Verdampfungseinrichtung und zugehöriges Herstellungsverfahren
DE102008029110A1 (de) * 2008-06-20 2009-12-24 J. Eberspächer GmbH & Co. KG Misch- und/oder Verdampfungseinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012164722A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105545438A (zh) * 2014-10-22 2016-05-04 丰田自动车株式会社 分散板和内燃机
US9683478B2 (en) 2014-10-22 2017-06-20 Toyota Jidosha Kabushiki Kaisha Dispersion plate and internal combustion engine
CN105545438B (zh) * 2014-10-22 2018-06-01 丰田自动车株式会社 分散板和内燃机

Also Published As

Publication number Publication date
JPWO2012164722A1 (ja) 2014-07-31
EP2716884A4 (fr) 2014-12-03
WO2012164722A1 (fr) 2012-12-06

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