WO2014166076A1 - Système de post-traitement d'échappement de moteur - Google Patents

Système de post-traitement d'échappement de moteur Download PDF

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Publication number
WO2014166076A1
WO2014166076A1 PCT/CN2013/074000 CN2013074000W WO2014166076A1 WO 2014166076 A1 WO2014166076 A1 WO 2014166076A1 CN 2013074000 W CN2013074000 W CN 2013074000W WO 2014166076 A1 WO2014166076 A1 WO 2014166076A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust
canister
exhaust treatment
baffles
housing
Prior art date
Application number
PCT/CN2013/074000
Other languages
English (en)
Inventor
William V. Alcini
Michael Golin
Lin Wang
Wenliang XING
Original Assignee
Tenneco Automotive Operating Company Inc.
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 Tenneco Automotive Operating Company Inc. filed Critical Tenneco Automotive Operating Company Inc.
Priority to JP2016506743A priority Critical patent/JP2016514799A/ja
Priority to CN201380075456.8A priority patent/CN105189963A/zh
Priority to DE112013006933.4T priority patent/DE112013006933T5/de
Priority to US14/782,874 priority patent/US20160047285A1/en
Priority to PCT/CN2013/074000 priority patent/WO2014166076A1/fr
Priority to KR1020157032180A priority patent/KR20150139968A/ko
Publication of WO2014166076A1 publication Critical patent/WO2014166076A1/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
    • F01N3/02—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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N13/011—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 having two or more purifying devices arranged in parallel
    • F01N13/017—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 having two or more purifying devices arranged in parallel the purifying devices are arranged in a single housing
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
    • 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
    • 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
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • 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
    • 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
    • F01N2270/00—Mixing air with 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/30—Removable or rechangeable blocks or cartridges, e.g. for filters
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • 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 disclosure relates to an engine exhaust after- treatment system.
  • Combustion engines are known to produce emissions that may be harmful to the environment.
  • exhaust after-treatment systems have undergone extensive analysis and development.
  • Various components that assist in treating engine emission include particulate filters and oxidation and reduction catalysts.
  • the present disclosure provides an engine exhaust after- treatment system including an exhaust passage; an exhaust treatment component housing communicating with the exhaust passage; a pair of baffles spaced apart within the housing; a plurality of exhaust treatment devices positioned between the pair of baffles, each exhaust treatment device including a canister; a plurality of restraining devices fixed between the pair of baffles for positioning each of the canisters between the baffles, each restraining device including at least a portion thereof that is angled relative to an outer surface of the canister such that ends of the restraining device abut the outer surface of the canister at the first end and prevent radial movement of the canister; and a soot blower positioned in the housing upstream of the exhaust treatment devices, the soot blower for dispersing particulate matter deposited on each of the exhaust treatment devices.
  • Figure 1 is a schematic representation of an exhaust system in accordance with a principle of the present disclosure
  • Figure 2 is a perspective view of an exhaust after-treatment system in accordance with a principle of the present disclosure
  • Figure 3 is an exploded perspective view of the exhaust after- treatment system illustrated in Figure 2;
  • Figure 4 is a partial exploded perspective view of an exhaust treatment component in accordance with a principle of the present disclosure
  • Figure 5 is a perspective view of a housing of an exhaust treatment component in accordance with a principle of the present disclosure
  • Figure 6 is a perspective view of an interior of the housing illustrated in Figure 5 as viewed from an inlet side;
  • Figure 7 is a perspective view of an interior of the housing illustrated in Figure 5 as viewed from an outlet side;
  • Figure 8 is a cross-sectional view taken along line 8-8 shown in Figure 5; and [0017] Figure 9 is an enlarged cross-sectional view of one of the exhaust treatment components illustrated in Figure 8.
  • FIG. 1 schematically illustrates an exhaust system 10 according to the present disclosure.
  • Exhaust system 10 can include at least an engine 12 in communication with a pair of fuel source 14a and 14b that, once combusted, will produce exhaust gases that are discharged into an exhaust passage 16 having an exhaust after-treatment system 18.
  • Fuel sources 14a and 14b may contain different fuels.
  • fuel source 14a can include a low sulfur diesel fuel (LSF)
  • fuel source 14b can include an ultra-low-sulfur diesel fuel (ULSF).
  • Other exemplary fuels that can be used include marine gas oil (MGO), marine diesel oil (MDO), intermediate fuel oil (IFO), heavy fuel oil (HFO), combinations of natural gas and diesel fuel, or blends of natural gas with hydrogen.
  • MGO marine gas oil
  • MDO marine diesel oil
  • IFO intermediate fuel oil
  • HFO heavy fuel oil
  • combinations of natural gas and diesel fuel or blends of natural gas with hydrogen.
  • any combination of the above- mentioned fuels can be stored in fuel sources 14a and 14b
  • an exhaust treatment component 20 Downstream from engine 12 can be disposed an exhaust treatment component 20, which can include a diesel oxidation catalyst (DOC), a catalyst-coated diesel particulate filter (DPF) component or, as illustrated, a selective catalytic reduction (SCR) component 22.
  • DOC diesel oxidation catalyst
  • DPF catalyst-coated diesel particulate filter
  • SCR selective catalytic reduction
  • SCR component 22 can also include therein a DOC or a DPF.
  • SCR component 22 can be an SCR catalyst-coated DPF or an SCR catalyst-coated flow-through filter (FTF).
  • Exhaust after-treatment system 18 can further include components such as a thermal enhancement device or burner 24 to increase a temperature of the exhaust gases passing through exhaust passage 16. Increasing the temperature of the exhaust gas is favorable to achieve light-off of the catalyst in the exhaust treatment component 20 in cold-weather conditions and upon start-up of engine 12, as well as initiate regeneration of the exhaust treatment component 20 when the exhaust treatment component 20 is a DPF.
  • a thermal enhancement device or burner 24 to increase a temperature of the exhaust gases passing through exhaust passage 16. Increasing the temperature of the exhaust gas is favorable to achieve light-off of the catalyst in the exhaust treatment component 20 in cold-weather conditions and upon start-up of engine 12, as well as initiate regeneration of the exhaust treatment component 20 when the exhaust treatment component 20 is a DPF.
  • exhaust after-treatment system 18 can include a dosing module 26 for periodically dosing an exhaust treatment fluid into the exhaust stream.
  • dosing module 26 can be located upstream of exhaust treatment component 20, and is operable to inject an exhaust treatment fluid into the exhaust stream.
  • dosing module 26 is in fluid communication with a reagent tank 28 and a pump 30 by way of inlet line 32 to dose an exhaust treatment fluid such as diesel fuel, urea, or gaseous ammonia into the exhaust passage 16 upstream of exhaust treatment component 20.
  • Tank 28 may store liquid exhaust treatment fluids, or may store solid or gaseous ammonia.
  • Other materials that can be used to enhance exhaust treatment in combination with urea can be ethanol or hydrogen that may be stored in a separate tank (not shown).
  • Dosing module 26 can also be in communication with reagent tank 28 via return line 34.
  • Return line 34 allows for any exhaust treatment fluid not dosed into the exhaust stream to be returned to reagent tank 28. Flow of the exhaust treatment fluid through inlet line 32, dosing module 26, and return line 34 also assists in cooling dosing module 26 so that dosing module 26 does not overheat.
  • dosing module 26 can be configured to include a cooling jacket that passes a coolant around dosing module 26 to cool it.
  • the amount of exhaust treatment fluid required to effectively treat the exhaust stream may vary with load, engine speed, exhaust gas temperature, exhaust gas flow, engine fuel injection timing, desired NO x reduction, barometric pressure, relative humidity, EGR rate and engine coolant temperature.
  • a NO x sensor or meter 36 may be positioned downstream from SCR component 22. NO x sensor 36 is operable to output a signal indicative of the exhaust NO x content to an engine control unit (ECU) 38. All or some of the engine operating parameters may be supplied from ECU 38 via the engine/vehicle databus to an exhaust system controller 40. The exhaust system controller 40 could also be included as part of the ECU 38. Exhaust gas temperature, exhaust gas flow and exhaust back pressure and other vehicle operating parameters may be measured by respective sensors, as indicated in Figure 1.
  • the amount of exhaust treatment fluid required to effectively treat the exhaust stream can also be dependent on the size of the engine 12.
  • large-scale diesel engines used in locomotives, marine applications, and stationary applications can have exhaust flow rates that exceed the capacity of a single dosing module 26. Accordingly, although only a single dosing module 26 is illustrated for urea dosing, it should be understood that multiple dosing modules 26 for urea injection are contemplated by the present disclosure.
  • the type of fuel provided to engine 12 can be switched between different fuel sources 14a and 14b.
  • fuel sources 14a and 14b carry fuels with different sulfur contents, respectively
  • after-treatment system 18 is not necessarily being utilized. That is, when engine 12 is a marine application where the vessel is located a predetermined distance from shore, emission regulations may not require use of after-treatment system 18. Accordingly, any exhaust produced by engine 12 while using a high-sulfur-content fuel (or any type of fuel) may be expelled into the atmosphere without passing through after-treatment system 18.
  • exhaust system 10 may include an after-treatment by-pass pipe 44.
  • a valve 48 may be positioned at an inlet of by-pass pipe 44 to allow exhaust gas to flow through by-pass pipe 44 or through after-treatment system 18.
  • Valve 48 is in communication with controller 40 or ECU 38. If engine 12 is operating on a high-sulfur-content fuel, controller 40 or ECU 38 can instruct valve 48 to open by-pass pipe 44 and close exhaust passage 16 downstream of valve 48 to allow exhaust to escape into the atmosphere without passing through after-treatment system 18. Similarly, if engine 12 is being operated in an area where emission regulations require exhaust after-treatment, controller 40 or ECU 38 can instruct valve 48 to close by-pass pipe 44 to allow exhaust to pass through after-treatment system 18.
  • Valves 50a and 50b are in communication with controller 40 and/or ECU 38.
  • controller 40 or ECU 38 can instruct valves 50a and 50b to either open or close. For example, if engine 12 is switching to a lower-sulfur-containing fuel from a higher-sulfur-containing fuel, controller 40 or ECU 38 can instruct valve 50a to close and instruct valve 50b to open.
  • controller 40 or ECU 38 Before controller 40 or ECU 38 sends instructions to valves 50a and 50b to either open or close, controller 40 or ECU 38 can instruct burner 24 to be activated to raise exhaust temperatures to an extent where any un-combusted fuel present in the exhaust stream can be combusted (e.g., 300 C). In this regard, if a fuel switch is desired, controller 40 or ECU 38 can signal instruct burner 24 to activate and delay actuation of valves 50a and 50b until burner 24 has operated for a predetermined period of time.
  • valve 48 can be controlled to open by-pass pipe 44 during the fuel switch while burner 24 is activated. When the fuel switch is complete and burner 24 is deactivated, valve 48 can close by-pass pipe 44 and allow the exhaust to pass through exhaust after-treatment system 18. In this manner, it can be ensured that any un-combusted high-sulfur-containing fuel can be prevented from reaching SCR component 22.
  • valve 48 can be designed to be synchronized with fuel valves 50a and 50b. That is, if a signal is sent by controller 40 to fuel valve 50b to open such that engine 12 can operate on a lower-sulfur-containing fuel, valve 48 can simultaneously receive a signal to close by-pass pipe 44 to allow exhaust to travel through exhaust after-treatment system 18. Similarly, if a signal is sent by controller 40 to open fuel valve 50a such that engine 12 can operate on a higher-sulfur-containing fuel, valve 48 can simultaneously receive a signal to open by-pass pipe 44 to allow exhaust to be expelled into the atmosphere before passing through after-treatment system 18.
  • After-treatment system 18 includes exhaust passage 16 that provides exhaust produced by engine 12 to exhaust treatment component 20.
  • a pair of mixing devices 52 can be disposed in exhaust passage 16 at a location between dosing module 26 and exhaust treatment component 20. Mixing devices 52 assist in dispersing and intermingling the exhaust treatment fluid dosed into the exhaust passage 16 with the exhaust produced by engine 12.
  • a pair of mixing devices 52 are illustrated in Figures 2 and 3, it should be understood that a greater or fewer number of mixing devices 52 can be used without departing from the scope of the present disclosure.
  • Exhaust after-treatment system 18 can be supported by a plurality of support structures 53.
  • valve 48 can be located at inlet 54 and operated to allow exhaust travelling in exhaust passage 16 to bypass exhaust treatment component 20.
  • another valve 56 can also be located at an exhaust treatment component inlet 58 so that when bypass pipe 44 is opened, fluid flow through exhaust treatment component 20 can be prevented by valve 56. In other words, if valve 48 is open, valve 56 is closed.
  • valves 48 and 56 can be, for example, butterfly-type valves actuated by a solenoid (not shown).
  • bypass pipe 44 can be modular in design.
  • bypass pipe 44 can include a pair of curved sections 60a and 60b connected via a plurality of intermediate sections 62, 64, and 66.
  • intermediate sections 62 and 66 are illustrated in Figures 2 and 3 as being cylindrically-shaped pipes, it should be understood that intermediate sections 62 and 66 can comprise flexible bellows that allow for thermal expansion during use of bypass pipe 44.
  • Downstream from curved section 60b can be an outlet 68 that feeds the bypassed exhaust back into exhaust passage 16 at a position downstream from exhaust treatment component 20.
  • Exhaust treatment component 20 can include a housing 70 that supports a plurality of SCR components 22.
  • housing 70 is box-shaped and includes a plurality of outer panels 71.
  • Within outer panels 71 of housing 70 may be disposed a plurality of trusses 73.
  • Trusses 73 can be L-shaped members that are positioned at corners of outer panels 71 within an interior of housing 70.
  • Trusses 73 provide structural support to housing 70, and allow housing 70 to support each of SCR components 22.
  • Between trusses 73 can also be positioned cross-members 75. Similar to trusses 73, cross-members 75 provide structural support to housing 70.
  • Housing 70 supports an array of nine SCR components 22. Although nine SCR components 22 are illustrated in the figures, it should be understood that any number of SCR components 22 can be supported within housing 70 without departing from the scope of the present disclosure. SCR components 22 may be cylindrically-shaped, although any configuration for SCR components 22 is contemplated.
  • Housing 70 can be disposed between an inlet cone 72 and an outlet cone 74.
  • Inlet cone 72 includes a flange 76 that corresponds and bolts to flange 78 of housing 70.
  • Outlet cone 74 can include a flange 80 that corresponds and bolts to another flange 82 of housing 70.
  • housing 70 can include an inlet side 84 and an outlet side 86. At inlet side 86 can be positioned a particulate matter dispersion device 88 (hereinafter "soot blower"). Soot blower 88 is designed and operable to eject compressed air towards SCR components 22 to disperse any deposits of particulate matter that may build up on SCR components 22. Soot blower 88 includes a plurality of arrays 90 of nozzle lines 92, with each nozzle line 92 including a plurality of nozzles 94 for ejecting compressed air towards exhaust SCR components 22.
  • Nozzle lines 92 can be formed of various metal materials including aluminum, steel, copper, or any other material known to one skilled in the art.
  • Housing 70 can include a plurality of apertures (not shown) that allow nozzle lines 92 to pass therethrough.
  • a seat member 98 and gasket 100 can be used to secure nozzle lines 92 at apertures.
  • the present disclosure also provides a soot blower 88 that is designed to prevent the build-up of particulate matter and/or soot at locations other than the SCR component 22 face. More particularly, particulate matter and/or soot can build up at locations other than the SCR component 22 face. If too much particulate matter and/or soot builds up at these "dead spots" between SCR components 22, the built-up particulate matter and/or soot can eventually break off and plug the SCR components 22.
  • Housing 70 can include a pair of baffles 102a and 102b to support each SCR component 22.
  • Baffles 102a and 102b can be welded to inner surfaces 104 of housing 70 and include a plurality of through-holes 106 ( Figure 9) sized to receive SCR components 22.
  • Each SCR component 22 includes a canister 108 that houses a SCR substrate 1 10. Between canister 108 and SCR substrate 1 10 can be disposed an insulating mat 1 12.
  • Restraining devices 1 14 can be a linear (e.g., planar) member that is welded between baffles 102a and 102b.
  • restraining devices 1 14 can be L-shaped in cross-section ( Figure 7).
  • Angle a may be in the range of 1 to 20 degrees, inclusive.
  • angle a is in the range of 5 to 15 degrees, inclusive.
  • angle a is in the range of 5 to 10 degrees, inclusive.
  • restraining device 1 14 Due to at least a portion of restraining device 1 14 being angled relative to surface 1 16, restraining device 1 14 will abut canister 108 at a first end 1 18 as SCR component 22 is inserted into housing 70. Once restraining device 1 14 abuts canister 108, radial movement of SCR component 22 is prevented.
  • Figures 7 and 9 illustrate the abutment between restraining device 1 14 and canister 108. Moreover, the abutment between restraining devices 1 14 and canister 108 assists in positioning the canister between baffles 102a and 102b during insertion of canisters into housing 70.
  • canister 108 After canister 108 abuts restraining device 1 14, a second end 120 of canister 108 can be secured by bolting ear members 122.
  • Ear members 122 can be separately-formed members that are welded to second end 120 of canister 108.
  • canister 108 can be provided with a radially extending flange (not shown) at second end 120.
  • ear member 122 is operable to receive a fastener 124 that bolts ear member 122 and canister 108 to baffle 102b.
  • four restraining devices 1 14 (as represented by ears 122) can be used to secure canister 108 between baffles 102a and 102b. It should be understood, however, that a greater or lesser number of restraining devices 1 14 can be used without departing from the scope of the present disclosure.
  • restraining devices 1 14 secure first end 1 18 of canister 108, it is unnecessary to bolt first end 1 18 of canister 108 to baffle 102a.
  • the ease with which canisters 108 can be inserted and removed from housing 70 can be increased. More particularly, if any of SCR components 22 require servicing, only fasteners 124 need to be removed to withdraw SCR components 122 from housing 70. This greatly reduces service time in comparison to a configuration where SCR components 22 are bolted in first and second ends 1 18 and 120, or welded to baffles 102a and 102b.
  • ear members 122 can include an aperture 123 that may receive a tool (not shown) to assist an operator in pulling SCR component 22 from housing 70.

Abstract

L'invention concerne un système de post-traitement d'échappement de moteur comprenant un conduit d'échappement ; un logement de composant de traitement d'échappement communiquant avec le conduit d'échappement ; une paire de déflecteurs espacés au sein du logement ; une pluralité de dispositifs de traitement d'échappement positionnés entre la paire de déflecteurs, chaque dispositif de traitement d'échappement comprenant un réservoir ; une pluralité de dispositifs de retenue fixés entre la paire de déflecteurs pour le positionnement de chacun des réservoirs entre les déflecteurs, chaque dispositif de retenue comprenant au moins une partie de celui-ci qui est inclinée par rapport à une surface externe du réservoir de telle sorte que les extrémités du dispositif de retenue viennent en butée contre la surface externe du réservoir au niveau de la première extrémité et empêchent un mouvement radial du réservoir ; et un ventilateur à suie positionné dans le logement en amont des dispositifs de traitement d'échappement, le ventilateur à suie permettant de disperser les particules fines déposées sur chacun des dispositifs de traitement d'échappement.
PCT/CN2013/074000 2013-04-10 2013-04-10 Système de post-traitement d'échappement de moteur WO2014166076A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2016506743A JP2016514799A (ja) 2013-04-10 2013-04-10 エンジン排気ガス後処理システム
CN201380075456.8A CN105189963A (zh) 2013-04-10 2013-04-10 发动机排气后处理系统
DE112013006933.4T DE112013006933T5 (de) 2013-04-10 2013-04-10 Motorabgasnachbehandlungssystem
US14/782,874 US20160047285A1 (en) 2013-04-10 2013-04-10 Engine Exhaust After-Treatment System
PCT/CN2013/074000 WO2014166076A1 (fr) 2013-04-10 2013-04-10 Système de post-traitement d'échappement de moteur
KR1020157032180A KR20150139968A (ko) 2013-04-10 2013-04-10 엔진 배기 후처리 시스템

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/074000 WO2014166076A1 (fr) 2013-04-10 2013-04-10 Système de post-traitement d'échappement de moteur

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WO2014166076A1 true WO2014166076A1 (fr) 2014-10-16

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US (1) US20160047285A1 (fr)
JP (1) JP2016514799A (fr)
KR (1) KR20150139968A (fr)
CN (1) CN105189963A (fr)
DE (1) DE112013006933T5 (fr)
WO (1) WO2014166076A1 (fr)

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US10036294B2 (en) 2015-05-28 2018-07-31 Caterpillar Inc. Aftertreatment module with reduced bypass flow
WO2018154031A1 (fr) 2017-02-24 2018-08-30 Lab Sa Dispositif et procédé de nettoyage d'un équipement de désenfumage, en particulier un catalyseur de dénitrification ou un échangeur de chaleur
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EP4053384A1 (fr) * 2021-03-03 2022-09-07 Roth Technik Austria Gesellschaft Mit Beschränkter Haftung Dispositif de traitement ultérieur des gaz d'échappement pourvu de substrats multiples de purification des gaz d'échappement

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DE112013006933T5 (de) 2016-01-07
CN105189963A (zh) 2015-12-23
KR20150139968A (ko) 2015-12-14
JP2016514799A (ja) 2016-05-23
US20160047285A1 (en) 2016-02-18

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