GB2476827A - Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust - Google Patents

Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust Download PDF

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Publication number
GB2476827A
GB2476827A GB1000379A GB201000379A GB2476827A GB 2476827 A GB2476827 A GB 2476827A GB 1000379 A GB1000379 A GB 1000379A GB 201000379 A GB201000379 A GB 201000379A GB 2476827 A GB2476827 A GB 2476827A
Authority
GB
United Kingdom
Prior art keywords
exhaust
orifices
catalyst
arrangement according
periphery
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Withdrawn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
GB1000379A
Other versions
GB201000379D0 (en
Inventor
Michael A Potter
Federico Ferrero
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.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Priority to GB1000379A priority Critical patent/GB2476827A/en
Publication of GB201000379D0 publication Critical patent/GB201000379D0/en
Publication of GB2476827A publication Critical patent/GB2476827A/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Withdrawn legal-status Critical Current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
    • F01N3/18—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
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31423—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference
    • 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
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4337—Mixers with a diverging-converging cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • 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
    • 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)
  • 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)
  • Dispersion Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An aftertreatment arrangement 40 for an exhaust system comprising a catalyst device 44 with a fluid injection device 60 arranged in an exhaust passageway 42 upstream of it, where the fluid injection device comprises a plurality of orifices distributed around the periphery of the exhaust passageway. The exhaust passageway may be cylindrical and have the orifices distributed around its circumference or the orifices may be distributed around the periphery of an inlet portion 52 which widens from the exhaust passage and joins a main portion of the catalyst device. Preferably the orifices are arranged in at least one annular member extending around the exhaust passage where the annular member may be a helical member extending around the exhaust passageway by one or more turns.

Description

AFTERTREATNT DEVICE
Field of the Invention
The present invention relates to aftertreatment devices for exhaust gas systems and in particular to a device for aftertreatment fluid dosing.
Background of the Invention
The exhaust gases of automotive internal combustion engines contain various pollutants. To reduce the amount of pollutants entering the atmosphere, it is known to provide automotive exhaust systems with one or more aftertreatment devices, for example catalytic converters. To reduce the concentration of nitrogen oxides, for example it is known to employ selective catalytic reduction (SCR) technology. In US patent application 2008/0178580, for example, a liquid urea/water solution is added to the flow of exhaust gas upstream of the SCR catalyst, which enables the nitrogen oxides in the exhaust flow to be converted into harmless nitrogen and water vapour. The dispenser for injecting the liquid solution into the exhaust flow comprises one or more atomiser nozzles. This facilitates the mixing of the liquid with the exhaust gases before they reach the catalyst. To allow satisfactory mixing to occur, the dispenser needs to be located at a significant spacing, known as the mixing length, upstream of the catalyst.
Summary of Invention
Aspects of the present invention seek to provide an arrangement with a reduced mixing length.
According to a first aspect of the present invention, there is provided an aftertreatment arrangement for an automotive exhaust system comprising a catalyst device having a catalyst and a fluid injection device arranged in an exhaust passageway upstream of the catalyst, wherein the fluid injection device comprises a plurality of orifices distributed around the periphery of the exhaust passageway.
An advantage of this arrangement is that it permits a smaller mixing length than prior art devices, thus enabling space to be saved.
According to a second aspect of the present invention, there is provided an automotive exhaust system comprising a substantially cylindrical exhaust pipe connected to at least one catalyst device by an inlet portion of the device which widens from the exhaust pipe to a main portion of the device containing the catalyst, the system further comprising a fluid injection device arranged upstream of the catalyst, wherein the fluid injection device comprises a plurality of orifices arranged around the periphery of one of the exhaust pipe and said inlet portion.
According to a third aspect of the present invention there is provided a catalyst device comprising a main portion containing a catalyst for removing a pollutant from an exhaust gas stream, and an inlet passageway portion connected to said main portion and having distributed around the periphery thereof a plurality of fluid intake orifices.
Brief Description of the Drawings
Preferred embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings of which: Figure 1 is a schematic view of an aftertreatment
arrangement in accordance with the prior art;
Figure 2 is a corresponding schematic view of an aftertreatment arrangement in accordance with a first embodiment of the present invention; Figure 3 is an enlarged schematic view of part of the aftertreatment arrangement of Figure 2; and Figure 4 is a schematic view of an aftertreatrnent arrangement in accordance with a second embodiment of the present invention.
Description of the Preferred Embodiments
The expression "aftertreatment arrangement" used in this specification covers devices and combinations of devices intended to be inserted in the exhaust passageway of a vehicle with a view to removing pollutants from or otherwise conditioning exhaust gases.
The expression "exhaust passageway" used in this specification covers all parts of an exhaust system including the exhaust pipe itself and all portions of any aftertreatment devices incorporated therein.
The terms "circumference" and "diameter" are used in this specification in a general sense and are not to be taken to imply that the element being described is necessarily circular in cross section.
Referring to the drawings, Figure 1 shows a prior art aftertreatment arrangement 10 comprising an exhaust pipe 12 and an aftertreatment device 14, in the form of a catalyst device. As shown, device 14 comprises an inlet portion 22, a main portion 24 containing the catalyst, and an outlet portion 26. Exhaust gases are arranged to flow through the aftertreatment arrangement 10 in the direction of arrow 16 from an internal combustion engine (not shown) through pipe 12 and device 14 to an exhaust outlet to the surrounding atmosphere.
An aftertreatment fluid injector 30 is arranged in the wall of pipe 12 upstream of device 14. The injector has a nozzle 32 for injecting a metered dose of liquid into the exhaust gas stream flowing through pipe 12. The dose is emitted in a conical spray pattern. The dose in controlled by a metering element indicated at 34. To allow the liquid time for it to be sufficiently well mixed in the gas stream before it arrives at the catalyst, the injector 30 is located at a spacing "rn", known as the mixing length, upstream of the catalyst.
Figures 2 and 3 show an aftertreatment device 40 in accordance with a first embodiment of the present invention, comprising an exhaust pipe 42 and a catalyst device 44 with a tapering inlet portion 52, a main portion 54 containing a catalyst, and a tapering outlet portion 56. An aftertreatment fluid injector 60 is arranged at a mixing length "s" upstream of the catalyst in main portion 54. The amounts of fluid dispensed or dosed by injector 60 is controlled by a metering element 64. The fluid is injected into the exhaust gas stream through five orifices 66 arranged at substantially equal spacings around the interior circumference of a hollow annular member 62 extending around pipe 42. As shown, the radially inner surface of the annulus 62 lies substantially flush with the interior surface of pipe 42. The interior circular passageway of the hollow annular member is connected to the metering element 64 so that the metered liquid can be sprayed into the exhaust flow via the orifices 66.
The above-described arrangement has several advantages.
The distribution of the orifices around the whole circumference of the exhaust pipe allows a quicker and more intimate dispersion of the dosed liquid in the exhaust gases.
It thus enhances the efficiency of the aftertreatment arrangement. In view of this the mixing length "s" can be substantially less than the mixing length "m" necessary in prior art systems. This leads to a saving of space. For example, there can be a 50% reduction in the mixing length.
Alternatively it permits other operating parameters to be varied instead, or in addition, for example the diameter of the exhaust pipe or the speed of the exhaust gases in pipe 42.
In addition, it can promote improved temperature characteristics. The arrangement of the orifices 66 in a circumferential ring rather than spaced along the longitudinal direction of exhaust pipe 42 leads to a further saving of space.
An advantage of the annulus 62 being flush with the exhaust pipe 42 is that it does not restrict the flow of exhaust gases. Thus exhaust backpressure is reduced. Also, this provides efficient cooling of the annulus 62.
Various modifications can be made to the above-described arrangement. For example, the annular member 62 may have two, three, four or six or more orifices 66 therein. Although they are preferably distributed equidistantly around the inner surface of the annulus, they may be unequally spaced, for example if the prevailing exhaust flow through pipe 42 is non-uniform. The member 62 may form only part of a ring, so that the orifices 66 are not distributed around the entire circumference. Two or more annular members 62 may be provided; these are located as close as possible to each other axially, preferably touching, so that the total length of the arrangement is kept as low as possible. The member 62 may form a helix around the exhaust pipe 42; the helix may have more than one complete turn, for example a complete turn and a partial turn, two complete turns or more.
Instead of being flush with the interior of the exhaust pipe 42 the annular member 62 may be arranged wholly or partly inside the exhaust pipe. This can assist in producing turbulence in the exhaust gas flow to accelerate the mixing of the dosed liquid in the gases.
One or more further aftertreatment devices may be provided in the pipe 42 between the engine and device 44 (i.e. upstream of device 44) . Instead, or in addition, one or more further aftertreatment devices may be provided between device 44 and the exhaust exit (i.e. downstream of device 44). These further aftertreatment devices may also have similar fluid injectors 60.
In the aftertreatment arrangement 70 of Figure 4, a catalyst device 74 has a conical inlet portion 82 and a main portion 84 containing the catalyst. The annular member 72 is located around the inlet conical portion 82, which forms part of the exhaust passageway. The interior of the annular member is supplied liquid by an injector 80 having a metering device 88. In this embodiment, the mixing length is "t". The annular member 72 is located substantially half way along the portion 82 and so has a diameter substantially greater than that of exhaust pipe 78.
The arrangement of the second embodiment has the same advantages as the first embodiment. In addition, the larger circumference of the annular member 72 allows more orifices 86 to be provided so that fluid can be injected at a greater rate. This constitutes to the possibility of an even smaller mixing length "t", The same modifications may be made to the second embodiment as to the first embodiment. As shown, a single annular member 72 has eight orifices 86, but as with the first embodiment, any desired member of rings or helical turns may be provided, each ring or turn having any desired plurality of orifices.
If desired, some or all of the orifices 66, 86 of each of the embodiments can be provided with check valves to protect against exhaust back flow into the volume of the hollow annular members 62, 72.
The described arrangements are particularly suitable for urea SOR applications intended for reducing nitrogen oxides.
They can also be used to introduce hydrocarbons or fuel into the exhaust stream to facilitate diesel particulate filter (DPF) regeneration, lean nitrogen oxide trap (LNT) desuiphation or LNT removal of nitrogen oxides.
Due to their improved emission conversion efficiently, the described arrangement can be used to balance the relationship between emissions requirements and engine efficiency; this in turn permits lower carbon dioxide emissions to be achieved.
Aftertreatment devices in accordance with the present invention may be used in non-automotive applications.

Claims (15)

  1. Claims 1. An aftertreatment arrangement (40, 70) for an exhaust system comprising a catalyst device (44, 74) having a catalyst and a fluid injection device (60, 80) arranged in an exhaust passageway (42, 78) upstream of the catalyst, wherein the fluid injection device comprises a plurality of orifices (66, 86) distributed around the periphery of the exhaust passageway.
  2. 2. An arrangement according to claim 1, wherein the exhaust passageway comprises a substantially cylindrical exhaust pipe (42) and the orifices (66) are distributed around the circumference of the pipe upstream of the catalyst device (44).
  3. 3. An arrangement according to claim 1, wherein the catalyst device (74) comprises an inlet portion (82) which widens from an exhaust pipe (78) to a main portion (84) of the catalyst device which houses the catalyst, the orifices (86) being distributed around the periphery of said inlet portion.
  4. 4. An arrangement according to any preceding claim, wherein the orifices (66, 86) are arranged in an annular member (62, 72) extending around the exhaust passageway (42, 82)
  5. 5. An arrangement according to any of claims 1 to 3, wherein the orifices are arranged in a plurality of annular members around the exhaust passageway.
  6. 6. An arrangement according to claim 5, wherein the orifices are arranged in two annular members around the exhaust passageway.
  7. 7. An arrangement according to any of claims 1 to 3, wherein the orifices are arranged in a helical member extending around the exhaust passageway.
  8. 8. An arrangement according to claim 7, wherein the helical member has more than one turn.
  9. 9. An arrangement according to claim 8, wherein the helical member has substantially two turns.
  10. 10. An arrangement according to any of claims 4 to 9 wherein the interior surface of the annular or helical member (62, 72) respectively is substantially flush with the interior surface of the exhaust passageway (42, 82)
  11. 11. An arrangement according to any preceding claim wherein the fluid injection device (60, 80) is a device for injecting metered doses of a liquid into the exhaust passageway (42, 82)
  12. 12. An exhaust system (40, 70) comprising a substantially cylindrical exhaust pipe (42, 78) connected to at least one catalyst device (44, 74) by an inlet portion (52, 82) of the device which widens from the exhaust pipe to a main portion (54, 84) of the device containing the catalyst, the system further comprising a fluid injection device (60, 80) arranged upstream of the catalyst, wherein the fluid injection device comprises a plurality of orifices (66, 86) arranged around the periphery of one of the exhaust pipe (42) and said inlet portion (82)
  13. 13. A system according to claim 12, wherein the orifices (66, 86) are arranged around said periphery in one of a ring, a plurality of rings, a helix having one turn and a helix having more than one turn.
  14. 14. A catalyst device (74) comprising a main portion (84) containing a catalyst for removing a pollutant from an exhaust gas stream, and an inlet passageway portion (82) connected to said main portion and having distributed around the periphery thereof a plurality of fluid intake orifices (86)
  15. 15. A catalyst device according to claim 14 further comprising a metering device (88) connected to said plurality of orifices and arranged to supply metered doses of a liquid thereto.
GB1000379A 2010-01-11 2010-01-11 Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust Withdrawn GB2476827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1000379A GB2476827A (en) 2010-01-11 2010-01-11 Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1000379A GB2476827A (en) 2010-01-11 2010-01-11 Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust

Publications (2)

Publication Number Publication Date
GB201000379D0 GB201000379D0 (en) 2010-02-24
GB2476827A true GB2476827A (en) 2011-07-13

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GB1000379A Withdrawn GB2476827A (en) 2010-01-11 2010-01-11 Aftertreatment arrangement with an injection device distributed around the periphery of the exhaust

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123936A (en) * 1991-05-20 1992-06-23 Pmc, Inc. Process and apparatus for the removal of fine particulate matter and vapors from process exhaust air stream
US20060248881A1 (en) * 2004-01-22 2006-11-09 Haruyuki Yokota System for Injecting Fuel into Diesel Engine Exhaust Pipe
DE102006055655A1 (en) * 2006-11-23 2008-05-29 Igs Development Gmbh Dosing device for dosing liquid into gas stream i.e. flue gas stream of internal combustion engine of motor vehicle, has pressure production unit flowtechnically connected with radially aligned nozzles over inlet pipe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5123936A (en) * 1991-05-20 1992-06-23 Pmc, Inc. Process and apparatus for the removal of fine particulate matter and vapors from process exhaust air stream
US20060248881A1 (en) * 2004-01-22 2006-11-09 Haruyuki Yokota System for Injecting Fuel into Diesel Engine Exhaust Pipe
DE102006055655A1 (en) * 2006-11-23 2008-05-29 Igs Development Gmbh Dosing device for dosing liquid into gas stream i.e. flue gas stream of internal combustion engine of motor vehicle, has pressure production unit flowtechnically connected with radially aligned nozzles over inlet pipe

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