CN105041430A - Integrated mixing system for exhaust aftertreatment system - Google Patents
Integrated mixing system for exhaust aftertreatment system Download PDFInfo
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- CN105041430A CN105041430A CN201510210853.2A CN201510210853A CN105041430A CN 105041430 A CN105041430 A CN 105041430A CN 201510210853 A CN201510210853 A CN 201510210853A CN 105041430 A CN105041430 A CN 105041430A
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- exhaust gas
- fluid
- mixing
- exit portion
- prolongation
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Classifications
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- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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]
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- 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
- F01N13/009—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 separate purifying devices arranged in series
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- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (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 an integrated mixing system for an exhaust aftertreatment systemIn one aspect, a swirl can mixer assembly for mixing a fluid with exhaust gas exhausted from an internal combustion engine is provided. The assembly includes an inlet portion including an injection area configured to receive a fluid injector for dispensing the fluid into the exhaust gas for mixing with the exhaust gas in the mixing assembly to produce an exhaust gas/fluid mixture, an outlet portion, and an extended mixing conduit fluidly coupled between the inlet portion and the outlet portion. The extended mixing conduit is curved about at least a portion of a circumference of the outlet portion to induce a swirl in the exhaust gas/fluid mixture such that the exhaust gas/fluid mixture enters the outlet portion tangentially thereto.
Description
Technical field
Exemplary embodiment of the present invention relates to the exhaust-gas treatment system for explosive motor, and relates more specifically to the exhaust-gas treatment system mixing the fluid be injected in exhaust gas stream in shorter physical length completely.
Background technique
The exhaust gas being discharged into exhaust-gas treatment system from explosive motor is heterogeneous mixture, it comprises gaseous emissions, such as carbon monoxide (" CO "), unburned hydrocarbons (" HC ") and nitrogen oxide (" NOx "), and the condensed phase material (liquid and solid) forming particulate matter.In various exhaust system device, provide the Catalyst Composition be usually placed on catalyst support member or matrix some or all in these exhaust gas compositions to be changed into non-control exhaust gas component.
The pump-down process technology reducing (particularly in diesel engine) for high-caliber particulate matter is particulate filter (" PF ") device.There is the multiple known filtration device structure used in PF device, it is presenting high efficiency, such as ceramic honeycomb wall flow filter, winding or filled type fabric filter, open celled foam, sintered metal fiber etc. in exhaust gas removal particulate matter.Pottery wall flow filter is adopted in automotive vehicles applications greatly.
Filter in PF device is for removing the physical arrangement of particulate from exhaust gas, and therefore, and the accumulation of the particulate be filtered will cause increasing the vent systems back pressure that motor experiences.In order to the problem of the back pressure increase that the accumulation solving exhaust gas particulate causes, PF device is cleaned regularly or regenerates.Regenerative operation is burnt and is collected in carbon in filter matrix and particulate matter and PF device is regenerated.
The regeneration of the PF device in vehicle application is normally automatic, and is controlled by motor or other controllers based on the signal that motor and vent systems sensor (such as temperature transducer and back pressure sensor) produce.Regeneration event comprises the level temperature of PF device be elevated on usual 600C, so that the particulate that burning is built up.
A kind of method generating the temperature required in vent systems of the regeneration being used for PF device is by the form of unburned HC(normally material fuel) be delivered to oxidation catalyst (" the OC ") device being placed in PF device upstream.Can by use HC sparger/vaporizer, (liquid or prevapourising) fuel be directly injected in exhaust gas and send HC.HC is oxidized thus cause the exothermic reaction that the temperature making exhaust gas raises in OC device.PF device is entered to downstream by the exhaust gas heated, thus burning (oxidation) particulate accumulations.
For the artificer that artificer particularly relates to the automobile application of limited space, a difficult problem is in exhaust stream, to have the sufficient waiting time, turbulent flow and distance fully to mix with exhaust gas before inletting device and to evaporate at OC device or other device upstreams any in this regard within it by allowing injected fluid in the Fluid injection of such as HC to exhaust gas.When there is no suitable preparation, the fluid of injection can not in OC device suitably oxidation and some burn incompletely, HC can pass device.This causes the fuel wasted through the uneven temperature in exhaust-gas treatment system and device.
Be developed to reduce the NO in the lean-burn automotive (such as diesel engine) of combustion fuel in excess of oxygen
xthe technology of emission level comprises selective catalytic reduction (" SCR ") device.The SCR catalyst synthetic be placed in SCR device preferably comprises zeolite and one or more of base metal, such as iron (" Fe "), cobalt (" Co "), copper (" Cu ") or vanadium (" V "), it effectively can operate thus there is such as ammonia (" NH
3") reducing agent when the NO that reduces in exhaust gas
xcomposition.SCR catalyst can be applied on the matrix of normal flow general formula matrix or particulate filter as carrier coating (washcoat).Reducing agent is delivered as liquid in the mode being similar to above-mentioned HC in SCR device upstream usually, and enters SCR device to interact with SCR catalyst synthetic to downstream, thus is lowered through the NO in the exhaust gas of SCR device
xlevel.Be similar to HC as above, when there is no suitable mixing and evaporation, the reducing agent (such as urea or ammonia) sprayed will work irrelevantly in SCR device, and some fluids may pass device thus cause the NO of reducing agent and the reduction of wasting
xtransformation efficiency.
Typical exhaust processing system can comprise multiple exhaust gas treatment device as above.In many cases, no matter whether have historical factor, described device can comprise and extends to the exhaust manifolds of the tailpipe exit of exhaust-gas treatment system by all parts arranged continuously along the exhaust manifold outlet from explosive motor.In order to meet stricter exhaust emissions requirement, exhaust gas treatment device to need in discharge cycle ignition as quickly as possible.Like this, it is desirable to exhaust gas treatment device to be placed as far as possible near motor, such as, with turbosupercharger or gas exhaust manifold close-coupled.Become less along with vehicle frame and need the Position Design of close-coupled, for exhaust-gas treatment system desired length may not necessarily can.
It is desirable that provide a kind of system, it will realize Homogeneous phase mixing and the distribution of the fluid be injected into compact distance in the exhaust gas in exhaust-gas treatment system.
Summary of the invention
On the one hand, provide whirlpool tank mixer assembly to mix with the exhaust gas of discharging from explosive motor for making fluid.This assembly comprises: intake section, and it comprises jeting area, and this jeting area is configured to receive fluid ejector and mixes to produce exhaust gas/fluid mixture in distributing fluids to exhaust gas thus with the exhaust gas in electric hybrid module; Exit portion; And be connected in the prolongation hybrid catheter between intake section and exit portion by fluid.Extend hybrid catheter and lay out the bending to cause whirlpool in exhaust gas/fluid mixture at least partially of the periphery of notch portion, make exhaust gas/fluid mixture and exit portion tangentially enter exit portion.
On the other hand, the exhaust gas processing system being configured to receive exhaust gas from explosive motor is provided.Described system comprises catalyst-assembly and is provided for the whirlpool tank mixer assembly that fluid mixes with exhaust gas.Whirlpool tank mixer assembly comprises: the intake section and the fluid ejector that comprise jeting area, and this fluid ejector is coupled to intake section and is configured to fluid to be assigned in jeting area in exhaust gas to mix with exhaust gas in electric hybrid module thus to produce exhaust gas/fluid mixture.This assembly also comprises the exit portion that is coupled to catalyst-assembly and is connected in the prolongation hybrid catheter between intake section and exit portion by fluid.Extend hybrid catheter and lay out the bending to cause whirlpool in exhaust gas/fluid mixture at least partially of the periphery of notch portion, make exhaust gas/fluid mixture and exit portion tangentially enter exit portion.
Present invention also provides following technological scheme.
Scheme
1.be provided for the whirlpool tank mixer assembly that fluid mixes with the exhaust gas of discharging from explosive motor, described assembly comprises:
Intake section, described intake section comprises jeting area, and described jeting area is configured to receive fluid ejector for be assigned to by described fluid in described exhaust gas thus to mix to produce exhaust gas/fluid mixture with described exhaust gas in electric hybrid module;
Exit portion; And
The prolongation hybrid catheter between described intake section and described exit portion is connected in by fluid, wherein said prolongation hybrid catheter, around periphery bending to cause whirlpool in described exhaust gas/fluid mixture at least partially of described exit portion, makes described exhaust gas/fluid mixture and described exit portion tangentially enter described exit portion.
Scheme
2.assembly according to scheme 1, wherein said intake section is the filter tank of the outlet having entrance and be connected to described prolongation hybrid catheter, and wherein said outlet is positioned at described jeting area downstream.
Scheme
3.assembly according to scheme 2, wherein said filter tank comprises cylindrical external surface, and the outlet of wherein said intake section extends through described cylindrical external surface.
Scheme
4.assembly according to scheme 1, wherein said exit portion has to be connected to the described entrance of prolongation hybrid catheter and the filter tank of outlet.
Scheme
5.assembly according to scheme 1, wherein said filter tank comprises cylindrical external surface.
Scheme
6.assembly according to scheme 1, wherein said prolongation hybrid catheter comprises mixing portion and diffusion section, wherein said mixing portion is coupled to described intake section, and described diffusion section is coupled to described exit portion, and described mixing portion is positioned in described diffusion section upstream.
Scheme
7.assembly according to scheme 6, the cross sectional area of wherein said mixing portion reduces along the length of described mixing portion, and the speed that cross sectional area is decrescence configured to contribute to increasing described exhaust gas and described fluid is to promote the mixing between described exhaust gas and described fluid.
Scheme
8.assembly according to scheme 6, the cross sectional area of wherein said diffusion section increases along the length of described diffusion section, and cumulative cross sectional area is configured to contribute to the diffusion of described exhaust gas and described fluid to improve the mixing between described exhaust gas and described fluid.
Scheme
9.assembly according to scheme 6, also comprises the mixer apparatus of the mixing portion being positioned at described prolongation hybrid catheter, and described mixer apparatus is configured to the mixing contributing to described exhaust gas and described fluid.
Scheme
10.assembly according to scheme 9, wherein said mixer apparatus comprises following at least one:
Multiple blade, is configured to promote to cause whirlpool in described exhaust gas/fluid mixture; And
Central ring, is configured to promote to produce Venturi effect at the exhaust gas/fluid mixture passed through from it.
Scheme
11.be configured to the exhaust gas processing system receiving exhaust gas from explosive motor, described system comprises:
Catalyst-assembly; And
Be provided for the whirlpool tank mixer assembly that fluid mixes with described exhaust gas, described whirlpool tank mixer assembly comprises:
Comprise the intake section of jeting area;
Fluid ejector, described fluid ejector is coupled to described intake section and is configured to described fluid to be assigned in described jeting area in described exhaust gas to mix with described exhaust gas in electric hybrid module thus to produce exhaust gas/fluid mixture;
Be coupled to the exit portion of described catalyst-assembly; And
The prolongation hybrid catheter between described intake section and described exit portion is connected in by fluid, wherein said prolongation hybrid catheter, around periphery bending to cause whirlpool in described exhaust gas/fluid mixture at least partially of described exit portion, makes described exhaust gas/fluid mixture and described exit portion tangentially enter described exit portion.
Scheme
12.system according to scheme 11, wherein said fluid ejector is reducing agent injector and described fluid is reducing agent.
Scheme
13.system according to scheme 11, wherein said catalyst-assembly is at least one in selective catalytic reduction (SCR) device, oxidation catalyst (OC) device and particulate filter (PF) device.
Scheme
14.system according to scheme 11, also comprises the second catalyst-assembly being coupled to described intake section.
Scheme
15.system according to scheme 14, wherein said second catalyst-assembly is oxidation catalyst (OC) device.
Scheme
16.system according to scheme 11, wherein said prolongation hybrid catheter comprises mixing portion and diffusion section, wherein said mixing portion is coupled to described intake section, and described diffusion section is coupled to described exit portion, and described mixing portion is positioned in described diffusion section upstream.
Scheme
17.system according to scheme 16, the cross sectional area of wherein said mixing portion reduces along the length of described mixing portion, and the speed that cross sectional area is decrescence configured to contribute to increasing described exhaust gas and described fluid is to promote the mixing between described exhaust gas and described fluid.
Scheme
18.system according to scheme 16, the cross sectional area of wherein said diffusion section increases along the length of described diffusion section, and the diffusion that cumulative cross sectional area is configured to contribute to increasing described exhaust gas and described fluid is to improve the mixing between described exhaust gas and described fluid.
Scheme
19.system according to scheme 16, also comprises the mixer apparatus of the mixing portion being positioned at described prolongation hybrid catheter, and described mixer apparatus is configured to the mixing contributing to described exhaust gas and described fluid.
Scheme
20.assembly according to scheme 19, wherein said mixer apparatus comprises following at least one:
Multiple blade, is configured to promote to cause whirlpool in described exhaust gas/fluid mixture; And
Central ring, is configured to promote to produce Venturi effect at the exhaust gas/fluid mixture passed through from it.
Will be apparent to above-mentioned feature and advantage of the present invention and other feature and advantage when read in conjunction with the accompanying drawings from hereafter specifically describe.
Accompanying drawing explanation
Other targets, feature, advantage and details are shown in the hereafter specific descriptions of embodiment by means of way of example, specifically describe with reference to accompanying drawing, in the accompanying drawings:
Fig. 1 is the schematic diagram of the explosive motor realizing feature of the present invention and the exhaust-gas treatment system be associated;
Fig. 2 is shown in Fig. 1 and the stereogram of the compact electric hybrid module of the fluid flowing passed therethrough is shown;
Fig. 3 is the cross-sectional view of the compact electric hybrid module that 3-3 shown in Fig. 2 and along the line intercepts;
Fig. 4 is the stereogram of the compact electric hybrid module shown in Fig. 1;
Fig. 5 is the cut away view of the compact electric hybrid module shown in Fig. 4; And
Fig. 6 is the stereogram of the exemplary mixer apparatus that can be used to the compact electric hybrid module shown in Fig. 1-5.
Embodiment
Hereafter describe be in fact only exemplary and do not attempt restriction the disclosure, its application or use.Should be appreciated that, in all of the figs, respective figure marks the part and feature that refer to same or correspondence.
With reference to figure 1, show explosive motor 10.It should be noted that invention disclosed herein is applied to needs and sprays such as hydrocarbon (" HC ") or urea and (or comprise other ammonia (" NH of liquid or gas
3")) the explosive motor of any type of exhaust-gas treatment system of fluid.In the following description, the exhaust-gas treatment system 12 describing diesel engine 10 and be associated.Diesel engine comprises cylinder block 14 and cylinder head 16, and cylinder block 14 and cylinder head 16 limit bucket cylinder and firing chamber (not shown) when combined.Reciprocating piston (not shown) to be placed in bucket cylinder and can to operate into pressurized air, when compressed in a manner known in the art and with described air burning during the fuel mix of spraying.It can be associated with gas exhaust manifold (not shown) by exhaust port 20(for products of combustion or exhaust gas 18) leave cylinder head 16, described in example shown embodiment, exhaust port 20 leads to the exhaust driven gas turbine side 22 of exhaust-gas-driven turbo charger 24.Exhaust gas makes impeller (not shown) rotate and leave turbosupercharger by leaving port 26 subsequently, and this impeller is rotatably installed in the exhaust driven gas turbine side of turbosupercharger.Leave port to be communicated with exhaust-gas treatment system 12 fluid, and the exhaust gas 18 leaving turbosupercharger 24 by leaving port 26 is transferred to this exhaust-gas treatment system.
Exhaust-gas treatment system 12 can according to the embody rule of motor 10 and installation thereof (i.e. vehicle, static etc.) and the one comprised in multiple structure.In the structure shown in Fig. 1, the exhaust gas 18 leaving exhaust-gas-driven turbo charger 24 by with leave the entrance Taper Pipe 32 that port 26 fluid is communicated with and enter oxidation catalyst (" OC ") device 30.OC device 30 can comprise such as flow type metal or ceramic monomer matrix (not shown), it is encapsulated in Stainless Steel Case or filter tank 36, the outlet that this Stainless Steel Case or filter tank 36 have entrance and be communicated with exhaust gas 18 fluid in exhaust-gas treatment system 12.Matrix can comprise the oxidation catalysis immunomodulator compounds be set to thereon usually.Oxidation catalysis immunomodulator compounds can be applied as carrier coating and can comprise platinum group metal, such as platinum (" Pt "), palladium (" Pd "), rhodium (" Rh ") or other suitable oxidation catalysts, or its combination.OC device 30 is applicable to process unburned gaseous state and non-volatile HC and CO, and it is oxidized to form carbon dioxide and water.
In the exemplary embodiment, compact electric hybrid module or whirlpool tank mixer assembly 40 are disposed immediately in OC device 30 downstream and are configured to receive the exhaust gas leaving OC device 30.The prolongation hybrid catheter 46 that whirlpool tank mixer 40 includes notch portion 42, exit portion 44 and extends betwixt.In the illustrated exemplary embodiment, the outlet 48 of OC device and the entrance 50 of whirlpool tank intake section 42 are configured to have similar diameter thus provide inclusion seal in the flowing of exhaust gas 18, apply very little constraint or do not impose restriction simultaneously in its vicinity.
Reducing agent fluid ejector 52 is installed to whirlpool tank mixer entrance part 42 in prolongation hybrid catheter 46 upstream and enters ammonia (" NH when extending hybrid catheter 46 at exhaust gas 18
3") base reductant 54(such as, Fig. 2 and Fig. 3) be ejected in the flowing of exhaust gas 18.Whirlpool tank mixer 40 operates into and reducing agent 54 is evaporated and makes it mix with exhaust gas 18 in the mode more specifically described herein.
Reducing agent 54 mixes with exhaust gas 18 to form exhaust gas/reducing agent mixture 56 in whirlpool tank mixer 40, and whirlpool tank mixer 40 causes the action of turning round and round of mixture 56 that is tangent with the axis 58 of mixer outlet part 44 or that turn round and round around axis 58.Cause the mixture 56 of whirlpool to be left by mixer outlet 60 subsequently and can be transferred to and to be positioned at below OC device 30 and the selective catalytic reduction of alignment in parallel (" SCR ") device 62.Similarly, mixer outlet part 44 to be placed in below mixer entrance part 42 and alignment in parallel.
SCR device 62 can comprise such as flow type metal or ceramic monomer matrix, it is encapsulated in Stainless Steel Case or filter tank 64, the outlet 68 that this Stainless Steel Case or filter tank 64 have entrance 66 and be communicated with the exhaust gas in whirlpool tank mixer 40/reducing agent mixture 56 fluid.The SCR catalyst synthetic be placed in SCR device 62 preferably comprises zeolite and one or more of base metal, such as iron (" Fe "), cobalt (" Co "), copper (" Cu ") or vanadium (" V "), it effectively can operate thus there is ammonia (" NH
3") base reductant when the NOx composition that reduces in exhaust gas 18.The outlet 68 of SCR device 62 can comprise the exhaust gas trap such as leaving Taper Pipe 70, it has outlet 72, this outlet 72 is configured to have flange member 74, this flange member 74 allows exhaust-gas treatment system 12 fluid to be connected to exhaust gas conduit (not shown), and exhaust gas is directed to additional exhaust gas treatment device (if installation) and is directed to air subsequently by this exhaust gas conduit.
In the exemplary embodiment, whirlpool tank exit portion 44 and SCR entrance 66 are configured to have similar diameter thus provide inclusion seal in the flowing of mixture 56, apply very little constraint or do not impose restriction simultaneously in its vicinity.As shown in Figure 2, filter tank 64 also can comprise the 2nd OC device 76 and particulate filter (" PF ") device 78.But, filter tank 64 only can comprise the one in SCR device 62, OC device 76 and PF device 78, or can comprise its combination in any.Exhaust gas 18 can mix with hydrocarbon (" HC ") (not shown) and be oxidized in the 2nd OC device 76, thus causes the exothermic reaction that the temperature making exhaust gas raises.PF device 78 is entered to downstream by the exhaust gas heated, thus (oxidation) particulate accumulations of burning in a known way.
With reference to figure 2-5, show exemplary whirlpool tank mixer 40.The prolongation hybrid catheter 46 that mixer 40 generally comprises intake section 42, exit portion 44 and extends betwixt.
Mixer entrance part 42 comprises the rigidity filter tank 80 with axis 82, and filter tank 80 limits entrance 50 and the outlet 84 of intake section 42.Entrance 50 is oriented to and is substantially perpendicular to outlet 84, and this outlet 84 is formed in the outer surface 86 of filter tank 80.Filter tank 80 comprises jeting area 88, and it is configured to receive being ejected in exhaust gas 18 by reducing agent 54 in outlet 84 upstream at least partially of reducing agent injector 52.
Extend hybrid catheter 46 and generally comprise entrance 90, mixing portion 92, diffusion section 94 and outlet 96.As shown, hybrid catheter 46 is that bending and around the periphery of mixer outlet part 44 a part extends.This path extended or lengthen for mixing exhaust gas 18 and reducing agent 54 provide is so that waiting time increased within it thus improve mixing.
The mixing portion 92 of conduit 46 is included in decreasing diameters between the initial part of entrance 90 and diffusion section 94 or cross sectional area, and this contributes to concentrating and accelerate flowing of exhaust gas/reducing agent mixture 56 to promote that its mixing increases.Mixing portion 92 also can comprise position mixer apparatus 98 in the inner to contribute to the further mixing between exhaust gas 18 and reducing agent 56.As shown in FIG. 6, in the exemplary embodiment, mixer apparatus 98 can comprise the blade 100 that multiple radial direction extends, and its circumference of central ring 102 around limiting hole 104 is spaced apart.Blade 100 contributes in gaseous mixture 56, introduce vortex movement or vortex 105(Fig. 3) to increase the mixing of exhaust gas 18 and reducing agent 54.In addition, central ring 102 makes mixture 56 be used as Venturi tube and diffuser in the diffusion of its downstream, to contribute to improving the mixing between exhaust gas 18 and reducing agent 54 by the speed that increases mixture 56 and extend there through.Alternatively, the mixer apparatus of any appropriate that whirlpool tank mixer 40 can be made to work as described herein can be used.
The diffusion section 94 of conduit 46 is included in cumulative diameter between diffusion section 94 initial part and conduit outlet 96 or cross sectional area, this contributes to disperse exhaust gas gas/reducing agent mixture 56, thus slows down the flowing velocity of mixture 56 and the mixing increased between exhaust gas 18 and reducing agent 54.Diffusion section 94 comprises inwall 99, and it limits hybrid catheter 46 at least in part and extend its whole length between duct entry 90 and outlet 96.As shown in Figure 3 and Figure 4, the curvature of diffusion section 94 makes fluid path extend around a part for the periphery of whirlpool tank mixer outlet part 44.This contributes to both making the length of fluid path extend between mixer entrance and exit portion 42,44, lays out again fairly large circumferential whirlpool 107(Fig. 3 that notch portion axis 58 produces mixture 56).
The interior surface shape of hybrid catheter outlet 96 and its enter the Flow Distribution that the position of mixer outlet part 44 and angle determine to enter downstream catalyst.Such as shown in Figure 5, the ratio of parameter can be a/D, the b/D between approximate 0.15 ~ 0.5 and the c/D between approximate 0.2 ~ 0.6 between approximate 0.1 ~ 0.40.But, these ratios can be changed with for required overall performance to balance Flow Distribution and mixing.
Mixer outlet part 44 comprises the rigidity filter tank 106 with axis 58, and filter tank 106 limits entrance 108 and the outlet 60 of intake section 44.Entrance 108 is oriented to and is substantially perpendicular to outlet 60 and receives mixture 56 from outlet 96, and it has the swirl component 105,107 be caused from both mixer apparatus 98 and circumferential diffusion section 94.Mixture 56 and mixer outlet part 44 tangentially enter this mixer outlet part 44, and the sense of rotation of swirl component 105 and 107 is orthogonal, its be desultory along multiple directions in the internal capacity of whirlpool tank mixer outlet part 44 in case contribute to strengthening liquid reducer drop before entering SCR device 62 evaporation and with the mixing of exhaust gas 18.
In the operation of whirlpool tank mixer assembly 40, exhaust gas 18 flows in mixer entrance part 42 and the injected device 52 of reducing agent 54 is ejected in exhaust gas 18.Subsequently, exhaust gas/reducing agent mixture 56 flows through outlet 84 and arrives prolongation hybrid catheter 46.
Exhaust gas/reducing agent mixture 56 is entered by entrance 90 and extends hybrid catheter 46.Along with diameter or the cross sectional area reduction of conduit mixing portion 92, exhaust gas 18 and reducing agent 54 continue mixing, thus increase speed and the mixing of fluid 18,54.When mixture 56 arrives mixer apparatus 98, in a part for mixture 56, whirlpool 105 is caused to strengthen mixing by blade 100, and the Venturi effect that a part for mixture 56 experience central ring 102 produces, thus on exhaust flow rate widely, also increase the mixing between exhaust gas 18 and reducing agent 54.
Subsequently, exhaust gas/reducing agent mixture 56 is to mixer apparatus 98 downstream flow to conduit diffusion section 94, at this, the bending circumferential paths of described part 94 causes circumferential swirl component 107 in the mixture, itself and whirlpool tank mixer outlet part 44 and axis 58 tangent.In addition, the cumulative diameter of diffusion section 94 or cross section make mixture 56 spread, and this reduces the flowing velocity of mixture 56 and contributes to the further mixing of exhaust gas 18 and reducing agent 54 and also increase the waiting time of mixture 56 in exit portion 94.The mixture 56 comprising the swirl component 105,107 produced by mixer apparatus 98 and circumferential diffusion section 94 is left by outlet 96 subsequently and extends hybrid catheter 46.
Exhaust gas/reducing agent mixture 56 enters whirlpool tank mixer outlet part 44 by entrance 108 from prolongation hybrid catheter 46.Swirl component 105,107 in the fluid flowing of mixture 56 is disintegrated or dissipates in filter tank 106, which enhances the mixing between exhaust gas 18 and reducing agent 54 and drop evaporation.Like this, even if exhaust-gas treatment system 12 has compactly designed, exhaust gas 18 and reducing agent 54 also can be thoroughly mixed before entering SCR device 62, the 2nd OC device 76 and/or PF device 78.This part ground be mixing because the mixing portion 92 of the extending length of bending hybrid catheter 46 and decreasing diameters promotes and/or evaporation, mixer apparatus 98 and bending diffusion section 94 cause swirl component 105 and 107, venturi/diffuser effect that mixer apparatus 98 produces, expansion cross section the diffuse fluid that promotes of diffusion section 94 and tangentially enter the fluid of mixer outlet part 44 with mixer outlet part 44.
Although reference example embodiment describes the present invention, but it will be appreciated by those skilled in the art that and can make various amendment in the case without departing from the scope of the present invention and its key element can be substituted by equivalent.In addition, many improvement can be made when not deviating from essential scope of the present invention and be adapted to instruction of the present invention to make concrete condition or equipment.Therefore, the present invention does not attempt to be restricted to disclosed specific embodiment, but the present invention will comprise all embodiments fallen within the scope of the application.
Claims (10)
1. be provided for the whirlpool tank mixer assembly that fluid mixes with the exhaust gas of discharging from explosive motor, described assembly comprises:
Intake section, described intake section comprises jeting area, and described jeting area is configured to receive fluid ejector for be assigned to by described fluid in described exhaust gas thus to mix to produce exhaust gas/fluid mixture with described exhaust gas in electric hybrid module;
Exit portion; And
The prolongation hybrid catheter between described intake section and described exit portion is connected in by fluid, wherein said prolongation hybrid catheter, around periphery bending to cause whirlpool in described exhaust gas/fluid mixture at least partially of described exit portion, makes described exhaust gas/fluid mixture and described exit portion tangentially enter described exit portion.
2. assembly according to claim 1, wherein said intake section is the filter tank of the outlet having entrance and be connected to described prolongation hybrid catheter, and wherein said outlet is positioned at described jeting area downstream.
3. assembly according to claim 2, wherein said filter tank comprises cylindrical external surface, and the outlet of wherein said intake section extends through described cylindrical external surface.
4. assembly according to claim 1, wherein said exit portion has to be connected to the described entrance of prolongation hybrid catheter and the filter tank of outlet.
5. assembly according to claim 1, wherein said filter tank comprises cylindrical external surface.
6. assembly according to claim 1, wherein said prolongation hybrid catheter comprises mixing portion and diffusion section, wherein said mixing portion is coupled to described intake section, and described diffusion section is coupled to described exit portion, described mixing portion is positioned in described diffusion section upstream.
7. assembly according to claim 6, the cross sectional area of wherein said mixing portion reduces along the length of described mixing portion, and the speed that cross sectional area is decrescence configured to contribute to increasing described exhaust gas and described fluid is to promote the mixing between described exhaust gas and described fluid.
8. assembly according to claim 6, the cross sectional area of wherein said diffusion section increases along the length of described diffusion section, and cumulative cross sectional area is configured to contribute to the diffusion of described exhaust gas and described fluid to improve the mixing between described exhaust gas and described fluid.
9. assembly according to claim 6, also comprises the mixer apparatus of the mixing portion being positioned at described prolongation hybrid catheter, and described mixer apparatus is configured to the mixing contributing to described exhaust gas and described fluid.
10. be configured to the exhaust gas processing system receiving exhaust gas from explosive motor, described system comprises:
Catalyst-assembly; And
Be provided for the whirlpool tank mixer assembly that fluid mixes with described exhaust gas, described whirlpool tank mixer assembly comprises:
Comprise the intake section of jeting area;
Fluid ejector, described fluid ejector is coupled to described intake section and is configured to described fluid to be assigned in described jeting area in described exhaust gas to mix with described exhaust gas in electric hybrid module thus to produce exhaust gas/fluid mixture;
Be coupled to the exit portion of described catalyst-assembly; And
The prolongation hybrid catheter between described intake section and described exit portion is connected in by fluid, wherein said prolongation hybrid catheter, around periphery bending to cause whirlpool in described exhaust gas/fluid mixture at least partially of described exit portion, makes described exhaust gas/fluid mixture and described exit portion tangentially enter described exit portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/264894 | 2014-04-29 | ||
| US14/264,894 US20150308316A1 (en) | 2014-04-29 | 2014-04-29 | Integrated mixing system for exhaust aftertreatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105041430A true CN105041430A (en) | 2015-11-11 |
Family
ID=54261872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510210853.2A Pending CN105041430A (en) | 2014-04-29 | 2015-04-29 | Integrated mixing system for exhaust aftertreatment system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20150308316A1 (en) |
| CN (1) | CN105041430A (en) |
| DE (1) | DE102015105559A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106762050A (en) * | 2015-11-20 | 2017-05-31 | 罗伯特·博世有限公司 | Integrated form exhaust gas aftertreatment system |
| CN107435576A (en) * | 2016-05-27 | 2017-12-05 | 罗伯特·博世有限公司 | Integrated exhaust gas aftertreatment system |
| CN109252921A (en) * | 2017-07-13 | 2019-01-22 | 罗伯特·博世有限公司 | Box exhaust gas aftertreatment system |
| JP2019120197A (en) * | 2018-01-05 | 2019-07-22 | フタバ産業株式会社 | Mixing device |
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| US9470132B2 (en) * | 2014-12-05 | 2016-10-18 | Cummins Emission Solutions, Inc. | Compact radial exterior exhaust assisted decomposition reactor pipe |
| PL3579971T3 (en) * | 2017-02-08 | 2024-03-11 | Basf Corporation | Catalyst composition |
| DE102017213954A1 (en) * | 2017-08-10 | 2019-02-14 | Robert Bosch Gmbh | Mixture preparation device, exhaust aftertreatment system |
| US10024217B1 (en) | 2017-08-22 | 2018-07-17 | Cummins Emission Solutions Inc. | Reductant decomposition reactor chamber |
| DE102018103368A1 (en) * | 2018-02-15 | 2019-08-22 | Man Truck & Bus Ag | Device for mixing exhaust gas and an additive |
| JP7087722B2 (en) | 2018-06-26 | 2022-06-21 | マツダ株式会社 | Engine exhaust |
| CN114635773B (en) * | 2018-07-06 | 2024-04-02 | 康明斯排放处理公司 | Decomposition chamber for aftertreatment system |
| US11028755B2 (en) * | 2019-03-20 | 2021-06-08 | Caterpillar Inc. | Rotational exhaust flow control for diesel exhaust fluid injection |
| USD907552S1 (en) | 2019-10-28 | 2021-01-12 | Cummins Emission Solutions Inc. | Baffle for a reductant delivery system |
| US11591943B2 (en) * | 2020-03-30 | 2023-02-28 | Faurecia Emissions Control Technologies, Usa, Llc | Serviceable catalyst and mixer unit for vehicle exhaust system |
| DE102020109022A1 (en) * | 2020-04-01 | 2021-10-07 | Purem GmbH | Mixed assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150308316A1 (en) | 2015-10-29 |
| DE102015105559A1 (en) | 2015-10-29 |
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Application publication date: 20151111 |