EP2687286B1 - Dispositif de mélange pour le post-traitement de gaz d'échappement - Google Patents

Dispositif de mélange pour le post-traitement de gaz d'échappement Download PDF

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Publication number
EP2687286B1
EP2687286B1 EP13002562.0A EP13002562A EP2687286B1 EP 2687286 B1 EP2687286 B1 EP 2687286B1 EP 13002562 A EP13002562 A EP 13002562A EP 2687286 B1 EP2687286 B1 EP 2687286B1
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EP
European Patent Office
Prior art keywords
exhaust gas
inner pipe
mixing device
main
exhaust
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.)
Active
Application number
EP13002562.0A
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German (de)
English (en)
Other versions
EP2687286A2 (fr
EP2687286A3 (fr
Inventor
Albert Herbert
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.)
MAN Truck and Bus SE
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MAN Truck and Bus SE
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Publication date
Application filed by MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP2687286A2 publication Critical patent/EP2687286A2/fr
Publication of EP2687286A3 publication Critical patent/EP2687286A3/fr
Application granted granted Critical
Publication of EP2687286B1 publication Critical patent/EP2687286B1/fr
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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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • B01F25/103—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components with additional mixing means other than vortex mixers, e.g. the vortex chamber being positioned in another mixing chamber
    • 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
    • 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
    • B01F25/32—Injector mixers wherein the additional components are added in a by-pass of the main flow
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • B01F2025/93—Arrangements, nature or configuration of flow guiding elements
    • B01F2025/931—Flow guiding elements surrounding feed openings, e.g. jet nozzles
    • 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
    • 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
    • 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
    • F01N2240/40—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 hydrolysis catalyst
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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

Landscapes

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

Claims (14)

  1. Dispositif de mélange (1) pour le post-traitement de gaz d'échappement (2) dans un système d'échappement d'un moteur à combustion interne, qui comporte un boîtier (4) comprenant une section d'entrée (3) et un tube intérieur (7) agencé à l'intérieur du boîtier (4), s'étendant essentiellement parallèlement à une direction d'injection principale (5) d'un appareil de dosage (6) pour l'alimentation d'un liquide et/ou d'un mélange liquide-gaz, muni d'une zone de prémélange (10) formée à l'intérieur (8) du tube intérieur (7), le boîtier (4) comprenant une partie de boîtier en forme de spirale (13) et l'appareil de dosage (6) étant agencé sur un côté frontal (11) du boîtier (4), un courant principal de gaz d'échappement (12) étant acheminé entre le boîtier (4) et la surface d'enveloppe extérieure (14) du tube intérieur (7) et pouvant être amené dans une zone de mélange principale (16), et un courant partiel de gaz d'échappement (17) pouvant être amené par un passage de tube intérieur (18) dans la zone de prémélange (10) plus à proximité de l'appareil de dosage, le courant partiel de gaz d'échappement (17) débouchant par l'intermédiaire de la zone de prémélange (10) dans la zone de mélange principale (16), et le courant principal de gaz d'échappement (12) comportant une proportion volumique de gaz d'échappement plus grande que le courant partiel de gaz d'échappement (17) .
  2. Dispositif de mélange (1) selon la revendication 1, dans lequel la direction d'injection principale (5) de l'appareil de dosage (6) est essentiellement parallèle et/ou coaxiale à l'axe longitudinal du boîtier (4) et/ou à l'axe longitudinal du tube intérieur (7).
  3. Dispositif de mélange (1) selon la revendication 1 ou 2, dans lequel le courant principal de gaz d'échappement (12) comporte au moins 70 % en volume du gaz d'échappement (2) amené dans la section d'entrée (3), de préférence au moins 80 % en volume du gaz d'échappement (2), de manière particulièrement préférée au moins 90 % en volume du gaz d'échappement (2).
  4. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel le tube intérieur (7) comporte une partie cylindrique (20) et une partie s'effilant (21), la partie s'effilant (21) étant agencée en amont de la partie cylindrique (20) dans la direction d'écoulement (S) du courant principal de gaz d'échappement (12).
  5. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel une déviation du courant partiel de gaz d'échappement (17) par un élément déflecteur (22) vers la direction d'injection principale (5) a lieu à l'intérieur du tube intérieur (7) et/ou directement avant la zone de prémélange (10) et/ou à l'extrémité avant de la zone de prémélange (10).
  6. Dispositif de mélange (1) selon la revendication 5, dans lequel l'élément déflecteur (22) est configuré sous forme annulaire et/ou symétrique par rotation et est de préférence configuré sur son côté intérieur (24) sous forme cylindrique circulaire et/ou dans sa section sous forme s'effilant vers son extrémité libre (25).
  7. Dispositif de mélange (1) selon la revendication 5 ou 6, dans lequel la longueur (27) de l'élément déflecteur (22) est plus courte que la longueur (28) du tube intérieur (7), de préférence en ce que la longueur (27) de l'élément déflecteur (22) est plus courte que la moitié de la longueur (28) du tube intérieur (7), de manière particulièrement préférée en ce que la longueur (27) de l'élément déflecteur (22) est plus courte qu'un quart de la longueur (28) du tube intérieur (7).
  8. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel l'angle de pulvérisation (a) est choisi de telle sorte que la pulvérisation ne touche essentiellement pas la paroi intérieure du tube intérieur (7) dans l'état non traversé par un gaz d'échappement.
  9. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel la section d'entrée (3) du gaz d'échappement est inférieure ou égale à la longueur (28) du tube intérieur (7), de préférence en ce que le rapport entre la section d'entrée (3) du gaz d'échappement (2) et la longueur (28) du tube intérieur (7) est de 1:1 à 1:1,5.
  10. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel le passage de tube intérieur (18) est formé par une pluralité d'ouvertures de passage (32), les ouvertures de passage (32) étant de préférence agencées sur un anneau circulaire ou un segment d'anneau circulaire, l'anneau circulaire ou le segment d'anneau circulaire étant de manière particulièrement préférée agencé dans le premier tiers de longueur ou quart de longueur, tourné vers l'appareil de dosage (6), du tube intérieur (7).
  11. Dispositif de mélange (1) selon l'une quelconque des revendications précédentes, dans lequel le tube intérieur (7) est agencé par l'intermédiaire de traverses à l'intérieur du dispositif de mélange (1) et les traverses sont de préférence agencées exclusivement dans le canal de dérivation acheminant le courant partiel de gaz d'échappement (17) depuis la zone d'entrée dans la zone de prémélange (10).
  12. Dispositif de mélange (1) selon la revendication 11, dans lequel au moins une traverse est formée de telle sorte que le courant partiel de gaz d'échappement (17) passant à côté de la traverse subisse une modification de direction définie, de préférence subisse une déviation d'au moins 10°, la géométrie des traverses étant de manière particulièrement préférée au moins semblable, de telle sorte que la déviation puisse être exécutée de manière au moins semblable.
  13. Dispositif de mélange selon l'une quelconque des revendications précédentes, dans lequel le courant partiel de gaz d'échappement (17) doit exécuter, en partant de la section d'entrée jusqu'aux ouvertures de passage, un mouvement (B) à l'encontre de la direction d'injection principale (5) et/ou en ce que les ouvertures de passage et/ou le canal de dérivation (19) du tube intérieur (7) sont agencés dans la direction longitudinale plus à proximité de l'appareil de dosage (6) que la zone, tournée vers l'appareil de dosage (6), de la section d'entrée.
  14. Dispositif de mélange selon l'une quelconque des revendications précédentes, dans lequel le tube intérieur (7), l'élément déflecteur (22) et/ou les traverses présentent une symétrie ponctuelle dans la section par rapport à l'axe/la direction d'injection principale (5), et/ou en ce que le tube intérieur (7), l'élément déflecteur (22) et/ou les traverses présentent une géométrie symétrique par rotation, de préférence par rapport à l'axe/la direction d'injection principale (5).
EP13002562.0A 2012-07-20 2013-05-16 Dispositif de mélange pour le post-traitement de gaz d'échappement Active EP2687286B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012014333.8A DE102012014333A1 (de) 2012-07-20 2012-07-20 Mischvorrichtung zur Nachbehandlung von Abgasen

Publications (3)

Publication Number Publication Date
EP2687286A2 EP2687286A2 (fr) 2014-01-22
EP2687286A3 EP2687286A3 (fr) 2017-06-28
EP2687286B1 true EP2687286B1 (fr) 2021-03-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13002562.0A Active EP2687286B1 (fr) 2012-07-20 2013-05-16 Dispositif de mélange pour le post-traitement de gaz d'échappement

Country Status (5)

Country Link
EP (1) EP2687286B1 (fr)
CN (1) CN103573350B (fr)
BR (1) BR102013017993B1 (fr)
DE (1) DE102012014333A1 (fr)
RU (1) RU2631591C2 (fr)

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Publication number Publication date
CN103573350B (zh) 2019-01-11
CN103573350A (zh) 2014-02-12
EP2687286A2 (fr) 2014-01-22
RU2631591C2 (ru) 2017-09-25
EP2687286A3 (fr) 2017-06-28
BR102013017993B1 (pt) 2021-04-06
BR102013017993A2 (pt) 2015-06-30
RU2013130797A (ru) 2015-01-10
DE102012014333A1 (de) 2014-01-23

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