EP2168672A1 - Mixing device - Google Patents

Mixing device Download PDF

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Publication number
EP2168672A1
EP2168672A1 EP08016764A EP08016764A EP2168672A1 EP 2168672 A1 EP2168672 A1 EP 2168672A1 EP 08016764 A EP08016764 A EP 08016764A EP 08016764 A EP08016764 A EP 08016764A EP 2168672 A1 EP2168672 A1 EP 2168672A1
Authority
EP
European Patent Office
Prior art keywords
deflectors
mixing device
case
mixer unit
pipe
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Withdrawn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
EP08016764A
Other languages
German (de)
French (fr)
Inventor
Shoja Farr
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.)
Faurecia Emissions Control Technologies UK Ltd
Original Assignee
Emcon Technologies UK Ltd
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 Emcon Technologies UK Ltd filed Critical Emcon Technologies UK Ltd
Priority to EP08016764A priority Critical patent/EP2168672A1/en
Publication of EP2168672A1 publication Critical patent/EP2168672A1/en
Withdrawn legal-status Critical Current

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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
    • F01N3/24—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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • 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
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4521—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube
    • B01F25/45211—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube the elements being cylinders or cones which obstruct the whole diameter of the tube, the flow changing from axial in radial and again in axial
    • 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
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel 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
    • F01N3/2066—Selective catalytic reduction [SCR]

Definitions

  • DPFs diesel particulate filters
  • SCR Selective Catalytic Reduction
  • the objective of this disclosure is to create good gas flow diffusion and mixing with minimum pressure loss in within a minimum package space.
  • the flow diffusion and mixing device is placed within the exhaust pipe.
  • the exhaust pipe diameter is 5 inches.

Landscapes

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

Abstract

The invention relates to a mixing device providing an even distribution of a gas stream, which has a perforated pipe with a number of external deflectors attached to the pipe.

Description

  • To clean up emissions from diesel engines, (e.g. for vehicles such as trucks and cars, and stationary engines) it is known to use diesel particulate filters (DPFs) and Selective Catalytic Reduction (SCR). For either system to work reliably and effectively it is necessary that the gases are highly dispersed and are evenly distributed onto the catalyst or filter. Mixers can be used to aid dispersion of gases and liquids. However these mixers create pressure losses with consequent reduction in engine performance and fuel economy.
  • The objective of this disclosure is to create good gas flow diffusion and mixing with minimum pressure loss in within a minimum package space.
  • In a typical engine exhaust the flow diffusion and mixing device is placed within the exhaust pipe. For a typical heavy duty engine of 12 litres capacity the exhaust pipe diameter is 5 inches.
  • It could be shown by the applicant that improved flow diffusion and mixing and reduced pressure loss is achieved by having a perforated pipe with a number of external deflectors attached to the pipe to direct the flow towards the substrate front face. The defectors size and number is then optimized depending on the flow conditions and design of the after treatment assembly. The deflectors may be full rings or partial rings attached at different angle to the external of the perforated pipe.
  • This results in improved mixing and gas flow diffusion and the back pressure is reduced simultaneously. Thus the adverse impact on engine performance and fuel economy is reduced.
    • Figure 1: shows an example of the combined diffusion and mixer unit with guiding deflectors. Case 01.
    • Figure 2: shows an example of the diffuser and mixer unit without the deflectors as disclosed in XC7000159-D. Case 02.
    • Figure 3: shows an example of the diffuser and mixer unit with partial deflectors as disclosed in XC7000159-F. Case 03.
    • Figure 4: shows the CFD analysis performed on a suitable combined flow diffuser and mixer unit with full deflectors within a vehicle after treatment assembly. Case 01.
    • Figure 5: show the CFD analysis performed on a suitable combined flow diffuser and mixer unit with out deflectors within a vehicle after treatment assembly. Case 02.
    • Figure 6: shows the CFD analysis performed on a suitable combined flow diffuser and mixer unit with partial deflectors within a vehicle after treatment assembly. The deflectors in this case are semi-circular. Case 03.

Claims (2)

  1. A mixing device having a member with a plurality of openings.
  2. A mixing device having at least one feature as disclosed in the specification and/or the drawings.
EP08016764A 2008-09-24 2008-09-24 Mixing device Withdrawn EP2168672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08016764A EP2168672A1 (en) 2008-09-24 2008-09-24 Mixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08016764A EP2168672A1 (en) 2008-09-24 2008-09-24 Mixing device

Publications (1)

Publication Number Publication Date
EP2168672A1 true EP2168672A1 (en) 2010-03-31

Family

ID=40498346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08016764A Withdrawn EP2168672A1 (en) 2008-09-24 2008-09-24 Mixing device

Country Status (1)

Country Link
EP (1) EP2168672A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8499548B2 (en) 2008-12-17 2013-08-06 Donaldson Company, Inc. Flow device for an exhaust system
US8539761B2 (en) 2010-01-12 2013-09-24 Donaldson Company, Inc. Flow device for exhaust treatment system
US8915064B2 (en) 2007-05-15 2014-12-23 Donaldson Company, Inc. Exhaust gas flow device
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
EP2580440B1 (en) 2010-06-10 2015-11-25 Emitec Gesellschaft für Emissionstechnologie mbH Exhaust gas treatment apparatus
US9410464B2 (en) 2013-08-06 2016-08-09 Tenneco Automotive Operating Company Inc. Perforated mixing pipe with swirler
US9435240B2 (en) 2013-08-06 2016-09-06 Tenneco Automotive Operating Company Inc. Perforated mixing pipe with swirler
US9534525B2 (en) 2015-05-27 2017-01-03 Tenneco Automotive Operating Company Inc. Mixer assembly for exhaust aftertreatment system
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9726063B2 (en) 2011-09-08 2017-08-08 Tenneco Automotive Operating Company Inc. In-line flow diverter
US10077702B2 (en) 2011-09-08 2018-09-18 Tenneco Automotive Operating Company Inc. In-line flow diverter
EP3265656B1 (en) 2015-03-06 2020-02-19 Tenneco GmbH Mixing box
US11208933B2 (en) 2017-09-19 2021-12-28 Tenneco (Suzhou) Emission System Co., Ltd. Exhaust gas after-treatment mixing device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190618A (en) * 1963-04-30 1965-06-22 Katzen Raphael Fluid mixer
US4043539A (en) * 1975-03-28 1977-08-23 Texaco Inc. Method and apparatus for static type fluid mixing
US4909635A (en) * 1988-01-05 1990-03-20 Societe Anonyme Dite: Alsthom Static device for homogenizing a flowing fluid
WO2001004466A1 (en) * 1999-07-08 2001-01-18 Johnson Matthey Public Limited Company Device and method for removing sooty particulate from exhaust gases from combustion processes
DE10351690A1 (en) * 2003-07-04 2005-02-10 F & B GmbH Feuerschutz & Brandbekämpfung Binder foam creating device for cement or mortar foam has air input tube in supply tube, forming separate mixing chambers with inner wall of supply tube
WO2007110575A1 (en) * 2006-03-28 2007-10-04 Et Uk Industries Limited A mixing device for an exhaust system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190618A (en) * 1963-04-30 1965-06-22 Katzen Raphael Fluid mixer
US4043539A (en) * 1975-03-28 1977-08-23 Texaco Inc. Method and apparatus for static type fluid mixing
US4909635A (en) * 1988-01-05 1990-03-20 Societe Anonyme Dite: Alsthom Static device for homogenizing a flowing fluid
WO2001004466A1 (en) * 1999-07-08 2001-01-18 Johnson Matthey Public Limited Company Device and method for removing sooty particulate from exhaust gases from combustion processes
DE10351690A1 (en) * 2003-07-04 2005-02-10 F & B GmbH Feuerschutz & Brandbekämpfung Binder foam creating device for cement or mortar foam has air input tube in supply tube, forming separate mixing chambers with inner wall of supply tube
WO2007110575A1 (en) * 2006-03-28 2007-10-04 Et Uk Industries Limited A mixing device for an exhaust system

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8915064B2 (en) 2007-05-15 2014-12-23 Donaldson Company, Inc. Exhaust gas flow device
US8499548B2 (en) 2008-12-17 2013-08-06 Donaldson Company, Inc. Flow device for an exhaust system
US9925502B2 (en) 2008-12-17 2018-03-27 Donaldson Company, Inc. Flow device for an exhaust system
US8539761B2 (en) 2010-01-12 2013-09-24 Donaldson Company, Inc. Flow device for exhaust treatment system
US9810126B2 (en) 2010-01-12 2017-11-07 Donaldson Company, Inc. Flow device for exhaust treatment system
EP2580440B1 (en) 2010-06-10 2015-11-25 Emitec Gesellschaft für Emissionstechnologie mbH Exhaust gas treatment apparatus
US11608764B2 (en) 2010-06-22 2023-03-21 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10968800B2 (en) 2010-06-22 2021-04-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10294841B2 (en) 2010-06-22 2019-05-21 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9726063B2 (en) 2011-09-08 2017-08-08 Tenneco Automotive Operating Company Inc. In-line flow diverter
US10077702B2 (en) 2011-09-08 2018-09-18 Tenneco Automotive Operating Company Inc. In-line flow diverter
US10533477B2 (en) 2012-04-19 2020-01-14 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9598999B2 (en) 2012-04-19 2017-03-21 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9458750B2 (en) 2012-04-19 2016-10-04 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US10603642B2 (en) 2013-02-15 2020-03-31 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10245564B2 (en) 2013-02-15 2019-04-02 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US11110406B2 (en) 2013-02-15 2021-09-07 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9410464B2 (en) 2013-08-06 2016-08-09 Tenneco Automotive Operating Company Inc. Perforated mixing pipe with swirler
US9435240B2 (en) 2013-08-06 2016-09-06 Tenneco Automotive Operating Company Inc. Perforated mixing pipe with swirler
US10626773B2 (en) 2015-03-06 2020-04-21 Tenneco Gmbh Mix box
EP3265656B1 (en) 2015-03-06 2020-02-19 Tenneco GmbH Mixing box
US9534525B2 (en) 2015-05-27 2017-01-03 Tenneco Automotive Operating Company Inc. Mixer assembly for exhaust aftertreatment system
US11208933B2 (en) 2017-09-19 2021-12-28 Tenneco (Suzhou) Emission System Co., Ltd. Exhaust gas after-treatment mixing device
US11486290B2 (en) 2017-09-19 2022-11-01 Tenneco (Suzhou) Emission System Co., Ltd. Exhaust gas after-treatment mixing device

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