CN205400860U - Reductant sprayer mount pad and after treatment system - Google Patents
Reductant sprayer mount pad and after treatment system Download PDFInfo
- Publication number
- CN205400860U CN205400860U CN201620125451.2U CN201620125451U CN205400860U CN 205400860 U CN205400860 U CN 205400860U CN 201620125451 U CN201620125451 U CN 201620125451U CN 205400860 U CN205400860 U CN 205400860U
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- China
- Prior art keywords
- reducing agent
- region
- agent injector
- mounting seat
- injector mounting
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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]
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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
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
-
- 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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- 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
-
- 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
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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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a reductant sprayer mount pad and after treatment system. This reductant sprayer mount pad is including configuring the installation region of being connected with the exhaust piping into. This reductant sprayer includes still that the dysmorphism in the installation region is regional. This dysmorphism region is configured as the speed that increases through the exhaust flow in this dysmorphism region, this dysmorphism region still is configured as the recycling that reduces through the exhaust flow in this dysmorphism region. Further, this reductant sprayer mount pad is including setting up the excision part on special -shaped region. It is most advanced that this excision part is configured as the reductant sprayer of acceptting through it.
Description
Technical field
This utility model relates to a kind of ejector mounting seat, more particularly to the reducing agent injector mounting seat being associated with the after-treatment system of electromotor.
Background technology
After-treatment system is associated with engine system.After-treatment system is configured to the nitrogen oxides (NOx) being present in waste gas stream in pre-treatment and the reduction of exhaust flow to air.In order to reduce NOx, after-treatment system can include reducing agent conveyor module, reducing agent injector and SCR (SCR) module.
Reducing agent injector is configured to spray reductant in the waste gas of the mixing tube flowing through after-treatment system.Reducing agent can include carbamide.In order to realize the NOx conversion level improved, it is necessary to realize the better flow distribution of reducing agent and waste gas and mix.Hybrid system is fixed in mixing tube, so that can realize reducing agent enhancing turbulent flow in the offgas in the length of mixing tube and improve distribution.
Reducing agent injector mounting seat is used to reducing agent injector is attached to mixing tube.But, the formation of urea deposit can occur in the region near the spray site of reducing agent injector.This urea deposit can hinder or stop reducing agent injection and/or interact with waste gas stream, and also results in the reduction of NOx conversion in after-treatment system.
U.S. Patent No. 8,079,211 describes the system and method for spraying liquid reducer in engine exhaust.In one example, described system includes the gas deflection device being positioned at ejector upstream, is configured to create the high-pressure zone of described deflector upstream and the low pressure zone in described deflector downstream around the outlet of described ejector at gas deflection device described herein.By-pass path shifts the waste gas stream of the high-pressure zone from described deflector upstream to allow the bypass segment inflow exhaust gas stream of waste gas to be used for the shroud of gas sprayed from the liquid reducer of described ejector with formation.
Utility model content
In in one of the present utility model, it is provided that a kind of reducing agent injector mounting seat.Described reducing agent injector mounting seat includes the installation region being configured to connect to exhaust piping.Described reducing agent injector also includes the region I being formed in described installation region.Described region I is configured to increase the speed of the waste gas stream by described region I.Described region I is further configured to reduce the recirculation of the waste gas stream by described region I.Further, described reducing agent injector mounting seat includes the cut-out that is arranged on described region I.Described cut-out is configured to receive the reducing agent injector extended there through most advanced and sophisticated.
Described region I includes the first convex leaf and the second convex leaf that are arranged on the both sides of described cut-out, and wherein relative to waste gas flow path direction, described first convex leaf is positioned at the position of described cut-out upstream, and described second convex leaf is positioned at the downstream part of described cut-out.
Described cut-out is arranged in the throat of described region I, and described throat connects described first convex leaf and the second convex leaf of described region I.
Farther including the receiving element from described installation region projection, described receiving element is configured to be connected with reducing agent injector.
The circumference of described cut-out tapers into along the thickness direction of described reducing agent injector mounting seat.
The orientation of the described region I being arranged on described installation region is alignd relative to waste gas flow path direction.
Compared with the upstream extremity of described region I, described cut-out is arranged closer to the downstream of described region I relative to described waste gas flow path direction.
In another aspect of the present utility model, it is provided that a kind of after-treatment system.Described after-treatment system includes the exhaust piping with cut-away area.Described after-treatment system also includes the SCR module coupled with described exhaust piping.Described after-treatment system farther includes the reducing agent injector mounting seat being arranged on exhaust piping.Described reducing agent injector mounting seat is positioned over the upstream of the described SCR module about waste gas stream.Described reducing agent injector mounting seat includes the installation region being connected with exhaust piping.Described reducing agent injector mounting seat also includes the region I being formed in described installation region.Described region I is towards the inner side of described exhaust piping.Described region I is configured to increase the speed of the waste gas stream by described region I.Described region I is further configured to reduce the recirculation of the waste gas stream by described region I.Further, described reducing agent injector mounting seat includes the cut-out that is arranged on described region I.Described after-treatment system includes the reducing agent injector being in fluid communication with described exhaust piping, and wherein said reducing agent injector mounting seat is accepted by the described cut-out being arranged in described reducing agent injector mounting seat.
Described reducing agent injector mounting seat is attached on the top of described exhaust piping.
Described reducing agent injector mounting seat farther includes to extend into the receiving element of the inner space of described exhaust piping from described installation region, and described receiving element is configured to receive the machanical fastener being associated with described reducing agent injector.
Of the present utility model another in, it is provided that a kind of method of waste gas stream controlled in exhaust piping.Described method includes receiving reducing agent injector by the installation region of reducing agent injector mounting seat.Described method also includes making waste gas stream flow on the region I of described reducing agent injector mounting seat.Described method also includes increasing the speed by the waste gas stream of described region I based on this stream.Described method includes reducing the recirculation by the waste gas stream of described region I based on this stream.
The deposit of the reducing agent around reducing agent injector tip is formed can owing to being increased by the recirculation minimizing of the waste gas stream of reducing agent injector mounting seat and speed and reduced or eliminate.Further, reducing agent can mix equably with waste gas stream, and can form the NOx conversion of improvement in after-treatment system.The care and maintenance relevant to the removing of the reducing agent deposit near reducing agent injector can also reduce, thus reducing the cost relevant to the care and maintenance cost of after-treatment system.
By the following description and accompanying drawing, other features of the present utility model and aspect are high-visible.
Accompanying drawing explanation
Fig. 1 is the side view of the example machine according to an embodiment of the present utility model；
Fig. 2 is the schematic diagram of the exemplary engine system being associated with machine according to an embodiment of the present utility model；
Fig. 3 is the perspective view of a part for the after-treatment system being associated with described engine system；
Fig. 4 is the perspective view of the reducing agent injector mounting seat according to an embodiment of the present utility model；
Fig. 5 is the cross-sectional view of described reducing agent injector mounting seat and the reducing agent injector being received in described mounting seat；
Fig. 6 is the cross-sectional view of the described reducing agent injector mounting seat in Fig. 4；
Fig. 7 to Fig. 9 is the perspective view of the reducing agent injector mounting seat according to various embodiments of the present utility model；With
Figure 10 is the flow chart of the method for controlling the waste gas stream in exhaust piping.
Detailed description of the invention
In all possible situation, in all of the figs by use identical reference number indicate identical or like.Figure 1 illustrates the exemplary embodiment according to machine 100 of the present utility model.Described machine 100 can be mine truck, as it can be seen, maybe can include any highway or the road vehicle that use fuel powered engines specifically described herein.Described machine 100 generally includes frame 102, and it for supporting engine system 104(referring to Fig. 2 in the middle of other system and assembly), described engine system 104 will be discussed in more detail in conjunction with Fig. 2.
Machine 100 also includes multiple ground joint element 106, is wheel in this instance.Those skilled in the art should understand that, the electromotor 108(of engine system 104 is shown in Fig. 2) thrust power can be provided for ground joint element 106, and can drive and include various machinery, electrically and the various other machines systems of hydraulic system and/or assembly.Further, machine 100 may also include operator control station 110 and/or dump body 112, this operator control station 110 includes the various operator control units for operating machine 100 and display, and this dump body 112 can be pivotable relative to frame 102.
With reference to Fig. 2, it is shown that the schematic diagram according to the engine system 104 of an embodiment of the present utility model.Engine system 104 includes electromotor 108, and this electromotor 108 can be internal combustion engine, for instance reciprocating-piston engine or gas turbine engine.Electromotor 108 can be spark ignition engine or compression ignition engine, for instance, Diesel engine, homogeneous charge compression ignition engine or reactivity control compression ignition engine or other compression ignition engines known in the art.Electromotor 108 can be supplied fuel by gasoline, diesel oil, biodiesel, dimethyl ether, ethanol, natural gas, propane, hydrogen, its combination or any other burning fuel known in the art.
Electromotor 108 can include other assembly (not shown), for instance, fuel system, gas handling system, include the PWTN etc. of drive system.Electromotor 108 can be used to provide power to any machine, and described machine includes but not limited to on-highway truck, highway truck, earth mover, electromotor etc..Therefore, engine system 104 can be relevant to industry, and described industry includes but not limited to transport service, building industry, agricultural, forestry, power-generating industry and Feedstock treating industry.
With reference to Fig. 2, engine system 104 includes the after-treatment system 114 being fluidly connected to the exhaust manifold of electromotor 108.After-treatment system 114 is configured to process the waste gas stream that the exhaust manifold from electromotor 108 is discharged.Waste gas stream includes discharge compound, and this discharge compound can include nitrogen oxides (NOx), unburnt Hydrocarbon, particulate matter and/or other combustion products known in the art.After-treatment system 114 can be configured to trapping or conversion NOx, unburnt Hydrocarbon, particulate matter, its other combustion products combining or being present in waste gas stream before discharging engine system 104.
In the embodiment shown, after-treatment system 114 includes the first module 116 of being fluidly connected to the exhaust piping 118 of electromotor 108.During engine operation, the first module 116 is provided in the internal admission waste gas from exhaust piping 118.First module 116 can comprise various emission-control equipment, for instance, diesel oxidation catalyst (DOC) 120 and diesel particulate filter (DPF) 122 but it also may use other devices.First module 116 and assembly therein are optional, and can be omitted in the engine applications of the various exhaust-gas treatment functions that need not be provided by the first module 116.
In the embodiment shown, electromotor 108 the waste gas stream being supplied to the first module 116 can first flow through DOC120 before entering pipeline 123, then passes through DPF122.Pipeline 123 includes mixing tube 124.Further, after-treatment system 114 includes reductant supply system 126.Injected reduce agent in mixing tube 124 by reducing agent injector assembly 127.Reducing agent injector assembly 127 can include one or more reducing agent injector 128(and see Fig. 3).Reducing agent can be fluid, for instance diesel exhaust fluid (DEF).Reducing agent can include carbamide, ammonia or other reducing agents known in the art.
Reductant supply system 126 includes reducing agent tank 130.Reducing agent is accommodated in reducing agent tank 130.The parameter (such as size, shape, position, and used material) relevant to reducing agent tank 130 can change according to the design of system and demand.Further, reducing agent injector 128 can be communicably coupled to controller (not shown).Based on the control signal being received into from controller, the reducing agent from reducing agent tank 130 is provided to reducing agent injector 128 by pump assembly 132.When reducing agent is injected in mixing tube 124, reducing agent mixes with the waste gas stream flowing through it, and is transported to the second module 134.Further, pipeline 123 is configured to the first module 116 and the second module 134 fluid interconnection, the waste gas stream making since engine 108 before smoke exhaust pipe 136 place that the downstream of the second module 134 connects is discharged, can flow through the first and second modules 116,134 successively.
Second module 134 includes SCR (SCR) module 138 and ammoxidation catalyst (AMOX) 140.When there is ammonia, SCR module 138 plays the effect processing the waste gas discharged from electromotor 108, and wherein said ammonia provides after being the urea-containing solution degradation in the waste gas stream being injected in mixing tube 124.AMOX140 is for converting, before discharging smoke exhaust pipe 136, any ammonia that the downstream transpiration from SCR module 138 goes out.
Fig. 3 illustrates the partial cut-away perspective view of a part for the pipeline 123 shown in the Fig. 2 according to an embodiment of the present utility model, which depict the mixing tube 124 and SCR module 138 that are positioned at pipeline 123 downstream.In order to promote the mixing of reducing agent and waste gas stream, it is possible to hybrid system 142 is associated with after-treatment system 114.Hybrid system 142 is arranged in this part of mixing tube 124.Hybrid system 142 may be located at the downstream of reducing agent injector assembly 127 and the upstream of SCR module 138.Hybrid system 142 includes multiple hybrid element 144.Hybrid element 144 can include the hybrid element of identical or different type.Such as, hybrid element 144 can include baffle plate blender, turbine mixer, impacting type blender etc..Spurt into the quantity of reducing agent in mixing tube 124 suitably to measure according to the ruuning situation of electromotor.
After-treatment system 114 disclosed herein provides as non-limiting example.It should be appreciated that, after-treatment system 114 can be configured with various arrangements and/or combination relative to exhaust manifold.These and other changes in after-treatment system design are possible under the premise without departing from protection domain of the present utility model.
Reducing agent injector mounting seat 200,202 is associated with after-treatment system 114.Reducing agent injector mounting seat 200,202 is positioned at the upstream of SCR module 138 relative to waste gas flow path direction " F ".Further, the top section 146 of reducing agent injector mounting seat 200,202 and mixing tube 124 is attached.Reducing agent injector mounting seat 200,202 can use the joint technologies such as such as welding and mixing tube 124 to be attached.Alternatively, any joint technology can be used, such as brazing, soldering.Further, it be also possible to use machanical fastener or binding agent reducing agent injector mounting seat 200,202 and mixing tube 124 to be attached.As it is shown in the figures, reducing agent injector mounting seat 200 is to arrange along the direction being parallel to waste gas flow path direction " F ".Otherwise, reducing agent injector mounting seat 202 is arranged angularly relative to waste gas flow path direction " F ".Reducing agent injector mounting seat 200,202 is configured to be installed on mixing tube 124 reducing agent injector 128.The quantity of reducing agent injector mounting seat 200,202 can be depending on the quantity of the reducing agent injector 128 being associated with after-treatment system 114, and can change based on system requirements.
Mixing tube 124 of the present utility model includes two reducing agent injectors 128 associated there.Therefore, mixing tube 124 includes two reducing agent injector mounting seats 200,202, and it is arranged on the top section 146 of mixing tube 124.It should be noted that, the quantity of reducing agent injector and reducing agent injector mounting seat can change.In one embodiment, four reducing agent injectors and corresponding reducing agent injector mounting seat can be provided on mixing tube 124.The design of reducing agent injector mounting seat 200 is explained referring now to Fig. 4 to Fig. 6.
With reference to Fig. 3, Fig. 4 and Fig. 5, reducing agent injector mounting seat 200 has substantially rectangular shape.Reducing agent injector mounting seat 200 limits axis A-A '.Axis A-A ' it is parallel to waste gas flow path direction " F ".Alternatively, reducing agent injector mounting seat 200 can be square, circular or elliptical shape.Reducing agent injector mounting seat 200 includes stepped design.When being arranged on mixing tube 124, the Part I 404 of reducing agent injector mounting seat 200 can from top section 146 projection of mixing tube 124.Otherwise, the Part II 406(of reducing agent injector mounting seat 200 is shown in Fig. 4) can stretch in the inner space 409 of mixing tube 124.Further, the top section 146 of mixing tube 124 includes cut-away area 413(and sees Fig. 3).Cut-away area 413 is configured to receive the Part II 406 of reducing agent injector mounting seat 200, reducing agent injector mounting seat 200 and mixing tube 124 to be attached.Cut-away area 413 has the rectangular shape with circular edges edge.It should be noted that, the shape of cut-away area 413 can change based on the shape of reducing agent injector mounting seat 200.
Reducing agent injector mounting seat 200 includes installation region 402.Installation region 402 is configured to connect with mixing tube 124 and formed contact.Installation region 402 mentioned in this article is referred to as the top surface 405 of the Part I 404 and Part II 406 facing waste gas stream.
The installation region 402 of reducing agent injector mounting seat 200 can include multiple receiving element 408.In the embodiment shown, reducing agent injector mounting seat 200 includes three receiving elements 408.But, receive the quantity of element 408 can change according to system requirements.Receive the element 408 installation region 402 projection from reducing agent injector mounting seat 200.
In one embodiment, element 408 is received to be configured to receive the machanical fastener (not shown) of reducing agent injector 128, to be connected in reducing agent injector mounting seat 200 by reducing agent injector 128.Receive element 408 to include hole 411(and see Fig. 5).In the embodiment shown, hole 411 can be implemented as the form of blind hole.Alternatively, hole 411 can be embodied as the form of through hole.In one embodiment, receiving element 408 can be integral with reducing agent injector mounting seat 200.Alternatively, element 408 is received to be formed as stand-alone assembly and fit together with reducing agent injector mounting seat 200 subsequently.When reducing agent injector mounting seat 200 couples with mixing tube 124, receive element 408 can extend in the inner space 409 of mixing tube 124.
Reducing agent injector mounting seat 200 includes region I410.Region I410 is formed in installation region 402.Region I410 is configured to the waste gas flowed therethrough and provides flow field.Region I410 is designed such that region I410 can increase the speed of the waste gas stream by region I410.Region I410 may be additionally configured to reduce the recirculation of the waste gas flowed there through.In Figure 5, marked by the direction arrow " F " of the waste gas stream of region I410.
Reducing agent injector mounting seat 200 includes cut-out 412.Cut-out 412 is arranged on the region I410 of reducing agent injector mounting seat 200.More specifically, cut-out 412 is arranged in the throat 414 of region I410.Cut-out 412 is configured to receive the reducing agent injector tip 416 of the reducing agent injector 128 passed therethrough.As shown in Figure 4, compared with the upstream extremity 418 of region I410, cut-out 412 is relative to the waste gas flow path direction " F " downstream 417 closer to region I410.The diameter " D " of cut-out 412 is corresponding to the diameter at the reducing agent injector tip 416 of reducing agent injector 128.
As shown in Figure 6, the cut-out 412 of region I410 is configured to receive reducing agent injector tip 416.Reducing agent injector 128 can be provided with packing ring 420.Packing ring 420 can be embodied as the form of metal clip packing ring, it is possible to is configured to be held in place by reducing agent injector tip 416.Packing ring 422 can be concordant with mixing tube 124 or stretch into mixing tube 124.Excessively prominent incorrect injection and the distribution that can cause reducing agent in mixing tube 124 at packing ring 422 and therefore reducing agent injector tip 416.Therefore, packing ring 420 stretching into the degree of depth and to be best determined by according to system requirements in mixing tube 124.In certain embodiments, it is also possible to the second packing ring 422 contacted with packing ring 420 is set.Packing ring 420,422 can be configured to regulate reducing agent injector tip 416 together and extend into the degree of depth in mixing tube 124.
The first convex leaf 424 and the second convex leaf 426 is included with reference to Fig. 4, region I410.First and second convex leaves 424,426 are arranged on any side of cut-out 412.First and second convex leaves 424,426 connect at the place of throat 414 of region I410.First convex leaf 424 is positioned at the upstream position of cut-out 412 relative to waste gas flow path direction " F " (see figure 5).More specifically, the first convex leaf 424 is positioned at the upstream extremity 418 of region I410 relative to waste gas flow path direction " F ".But, the second convex leaf 426 is positioned at the downstream of cut-out 412 relative to waste gas flow path direction " F " (see figure 5).More specifically, the second convex leaf 426 is positioned at the downstream 417 of region I410 relative to waste gas flow path direction " F ".
The first convex leaf 424 with reference to Fig. 4, region I410.Width " W1 " is to measure along the axis X-X ' of reducing agent injector mounting seat 200, and wherein axis X-X ' is perpendicular to axis A-A '.Further, the second of region I410 the convex leaf 426 has width " W2 ".Width " W2 " is to measure along the axis X-X ' of reducing agent injector mounting seat 200.Determine the ratio " R2 " of the width " W1 " of cut-out 412 width " W2 " with the ratio " R1 " of diameter " D " and cut-out 412 and diameter " D ", the speed making the waste gas stream by region I410 increases, and is reduced by the recirculation of its waste gas stream.In one embodiment, the width " W1 " of the first convex leaf 424 is about 0.75 to 5 with the ratio " R1 " of the diameter " D " of cut-out 412.In certain embodiments, ratio " R1 " is about 0.75 to 2.5 or 2.5 to 5.In one embodiment, ratio " R1 " can approximate 2.5.
In an embodiment of the present utility model, the width " W1 " of the first convex leaf 424 can be equal to the width " W2 " of the second convex leaf 426.Therefore, ratio " R1 " can be equal to ratio " R2 ".Correspondingly, the width " W2 " of the second convex leaf 426 is about 0.75 to 5 with the ratio " R2 " of the diameter " D " of cut-out 412.In certain embodiments, ratio " R2 " is about 0.75 to 2.5 or 2.5 to 5.In an example, ratio " R2 " can approximate 2.5.Alternatively, the width " W1 " of the first convex leaf 424 can be different from the width " W2 " of the second convex leaf 426.In such an embodiment, ratio " R1 " can be differently configured from ratio " R2 ".
When reducing agent injector mounting seat 200 is installed on mixing tube 124, the curved surface of the region I410 of reducing agent injector mounting seat 200 is towards waste gas stream.The curvature of region I410 changes along the cross section of reducing agent injector mounting seat 200.With reference to Fig. 5, it is angled that the first and second convex leaves 424,426 are disposed relative to installation region 402.The angle of incidence " α 1 " of the first and second convex leaves 424,426, " α 2 " are determined to be respectively so that the streamline flow in waste gas stream adaptation zone I410.Angle of incidence " α 1 " hereinafter is interchangeably referred to as receiving angle " α 1 ", and is define relative to waste gas flow path direction " F " at upstream extremity 418 place of the region I410 of reducing agent injector mounting seat 200.
More specifically, receive angle " α 1 " to be formed by the upstream extremity 436 of the first lug 424 relative to the installation region 402 of reducing agent injector mounting seat 200.Waste gas stream is to receive angle " α 1 " to be received within the region I410 of reducing agent injector mounting seat 200.In one embodiment, the angle of incidence " α 1 " at the region I410 at the first convex leaf 424 place is about 3 ° to 45 °.In one embodiment, angle of incidence " α 1 " can be about 6 °.Further, the angle of incidence " α 2 " at the region I410 at the second convex leaf 426 place is about 10 ° to 45 °.Such as, angle of incidence " α 2 " can be about 17 °.
With reference to Fig. 5, reducing agent injector mounting seat 200 has thickness " D1 " at downstream 432 place of the first convex leaf 424.Thickness " D1 " can be measure from axis Y-Y ' distance " A " place with cut-out 412.Further, reducing agent injector mounting seat 200 has thickness " D2 " at downstream 434 place of the second convex leaf 426.Thickness " D2 " can be measured from axis Y-Y ' distance " B " place with cut-out 412.It should be noted that, distance mentioned above " A " is equal to distance " B ".Further, thickness " D1 " is about 0.4 to 0.9 with the ratio " R3 " of thickness " D2 ".In certain embodiments, ratio " R3 " is about 0.4 to 0.6 or 0.6 to 0.9.In one embodiment, ratio " R3 " can approximate 0.7.
Referring now to Fig. 7, it is shown that the perspective view of the alternate embodiment of reducing agent injector mounting seat 700.In the present embodiment, the circumference of the cut-out 702 of the region I704 being arranged on installation region 710 is limited by conical region 708.Conical region 708 tapers into along the thickness " T " of reducing agent injector mounting seat 700 towards the outer surface 706 of reducing agent injector mounting seat 700.More specifically, the diameter of cut-out 702 reduces along thickness " T " towards the outer surface 706 of reducing agent injector mounting seat 700 so that the cut-out 702 diameter " D " at I704 place, region is more than the diameter " d " at outer surface 706 place in reducing agent injector mounting seat 700.It should be noted that, region I410,704 and the design and shape of therefore reducing agent injector mounting seat 200,700 be not limited to the graphical representation of exemplary in Fig. 4 to Fig. 7, and can change accordingly.
Fig. 8 illustrates another reducing agent injector mounting seat 800 according to an embodiment of the present utility model.As shown, the region I802 being formed in the installation region 810 of reducing agent injector mounting seat 800 can have approximate rectangular shape, is wherein provided with bending section 814,816 on the two ends along axis Z-Z '.In the present embodiment, the width " W3 " of region I802 is consistent along the axis Z-Z ' of reducing agent injector mounting seat 800.
As previously discussed, needing based on system, reducing agent injector mounting seat 202 can be angularly disposed on mixing tube 124 relative to waste gas flow path direction " F " (referring to Fig. 3).With reference to Fig. 9, therefore region I902 is formed in the installation region 904 of these reducing agent injector mounting seats 202, these reducing agent injector mounting seats 202 are oriented such that when reducing agent injector mounting seat 202 is fixed on mixing tube 124, and region I902 aligns relative to waste gas flow path direction " F ".The axis F-F ' limited by region I902 is parallel to waste gas flow path direction " F ".More specifically, the axis F-F ' of region I902 is angled relative to axis Z-Z ' so that region I902 aligns with waste gas flow path direction " F ".It should be noted that, the design of the region I902 shown in Fig. 9 is illustrative of, and any other design (explaining in such as Fig. 4 to Fig. 7) can be included, and protection domain of the present utility model not formed restriction.
Industrial applicibility
Flow field around the eject position of the reducing agent injector being arranged on mixing tube can have unfavorable recirculation and/or the low speed pattern of waste gas stream.This formation that can produce/increase to may be present in the urea deposit in reducing agent.This type of urea deposit can stop/hinder the interaction of reducing agent spray pattern/and waste gas stream, and produces deposition problems and the NOx conversion reduced in after-treatment system further.
Figure 10 is the flow chart of the method 1000 for controlling the waste gas stream in pipeline 123.In step 1002, reducing agent injector 128 is received by the installation region 402,710,810 and 904 of reducing agent injector mounting seat 200,202,700 and 800.In step 1004, waste gas flows through region I410,704,802,902 of reducing agent injector mounting seat 200,202,700,800.In step 1006, based on this stream, increase is by the speed of the waste gas stream of region I410,704,802,902.Further, to receive angle " α 1 " to receive waste gas stream.
In step 1008, based on this stream, reduce the recirculation of the waste gas stream flowing through region I410,704,802,902.Then towards SCR module 138 exhaust flue gas streams being arranged on pipeline 123 downstream.The flow field provided by region I410,704,802,902 of reducing agent injector mounting seat 200,202,700,800 reduce or eliminates recirculation around reducing agent injector tip 416, and also adds the speed near eject position.
Correspondingly, the deposit of the reducing agent around reducing agent injector tip 416 is formed and can increase due to the recirculation minimizing of the waste gas stream by reducing agent injector mounting seat 200,202,700,800 and speed and reduce or eliminate.Further, reducing agent can mix equably with waste gas stream, and can form the NOx conversion of improvement in after-treatment system 114.The care and maintenance relevant to the removing of the reducing agent deposit near reducing agent injector 128 can also reduce, thus reducing the cost relevant to the care and maintenance cost of after-treatment system 114.
Although aspect of the present utility model is in addition specifically shown with reference to above-described embodiment and describes, it will be appreciated, however, by one skilled in the art that disclosed machine, system and method can be modified under the premise without departing from disclosed spirit and scope to expect various other embodiment.This type of embodiment is appreciated that in the protection domain of the present utility model dropped on as determined based on claims and its any equivalent.
Claims (10)
1. a reducing agent injector mounting seat, it is characterised in that including:
Installation region, it is configured to be connected with exhaust piping；
Region I, it is formed in described installation region, and described region I is configured to:
Increase is by the speed of the waste gas stream of described region I；With
Minimizing is by the recirculation of the described waste gas stream of described region I；And
Cut-out, it is arranged on described region I, and described cut-out is configured to receive the reducing agent injector through it most advanced and sophisticated.
2. reducing agent injector mounting seat according to claim 1, it is characterized in that, described region I includes the first convex leaf and the second convex leaf that are arranged on the both sides of described cut-out, wherein relative to waste gas flow path direction, described first convex leaf is positioned at the position of described cut-out upstream, and described second convex leaf is positioned at the downstream part of described cut-out.
3. reducing agent injector mounting seat according to claim 2, it is characterised in that described cut-out is arranged in the throat of described region I, described throat connects described first convex leaf and the second convex leaf of described region I.
4. reducing agent injector mounting seat according to claim 1, it is characterised in that farther including the receiving element from described installation region projection, described receiving element is configured to be connected with reducing agent injector.
5. reducing agent injector mounting seat according to claim 1, it is characterised in that the circumference of described cut-out tapers into along the thickness direction of described reducing agent injector mounting seat.
6. reducing agent injector mounting seat according to claim 1, it is characterised in that the orientation of the described region I being arranged on described installation region is alignd relative to waste gas flow path direction.
7. reducing agent injector mounting seat according to claim 1, it is characterised in that compared with the upstream extremity of described region I, described cut-out is arranged closer to the downstream of described region I relative to described waste gas flow path direction.
8. an after-treatment system, it is characterised in that including:
Exhaust piping, which is provided with cut-away area；
SCR module, it couples with described exhaust piping；
Reducing agent injector mounting seat, it is received in the described cut-away area being arranged on described exhaust piping, described reducing agent injector mounting seat is positioned at the upstream of described SCR module relative to waste gas stream, and described reducing agent injector mounting seat includes:
The installation region being connected with described exhaust piping；
Being formed at the region I in described installation region, described region I towards the inner side of described exhaust piping, described region I is configured to:
Increase is by the speed of the described waste gas stream of described region I；With
Minimizing is by the recirculation of the described waste gas stream of described region I；With
It is arranged on the cut-out on described region I；With
With the reducing agent injector that described exhaust piping is in fluid communication, wherein said reducing agent injector mounting seat is accepted by the described cut-out being arranged in described reducing agent injector mounting seat.
9. after-treatment system according to claim 8, it is characterised in that described reducing agent injector mounting seat is attached on the top of described exhaust piping.
10. after-treatment system according to claim 8, it is characterized in that, described reducing agent injector mounting seat farther includes to extend into the receiving element of the inner space of described exhaust piping from described installation region, and described receiving element is configured to receive the machanical fastener being associated with described reducing agent injector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/628,836 US20160245142A1 (en) | 2015-02-23 | 2015-02-23 | Reductant injector mount |
| US14/628836 | 2015-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205400860U true CN205400860U (en) | 2016-07-27 |
Family
ID=56448560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620125451.2U Expired - Fee Related CN205400860U (en) | 2015-02-23 | 2016-02-18 | Reductant sprayer mount pad and after treatment system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20160245142A1 (en) |
| CN (1) | CN205400860U (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2570140B (en) | 2018-01-12 | 2020-07-01 | Perkins Engines Co Ltd | Exhaust gas flowhood with treatment fluid injector and variable mounting angle |
| US11624310B2 (en) | 2020-03-30 | 2023-04-11 | Faurecia Emissions Control Technologies, Usa, Llc | Vehicle exhaust system mixer with flexible doser mount |
| US11293328B2 (en) | 2020-06-16 | 2022-04-05 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer baffle with integrated sensor |
| US11555437B2 (en) * | 2020-12-07 | 2023-01-17 | Caterpillar Inc. | Exhaust pipe |
| WO2024006240A1 (en) * | 2022-06-28 | 2024-01-04 | Cummins Emission Solutions Inc. | Doser mount for exhaust aftertreatment system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147230A (en) * | 1978-04-14 | 1979-04-03 | Nelson Industries, Inc. | Combination spark arrestor and aspirating muffler |
| US8726643B2 (en) * | 2008-11-13 | 2014-05-20 | Donaldson Company, Inc. | Injector mounting configuration for an exhaust treatment system |
| US8800275B2 (en) * | 2012-02-27 | 2014-08-12 | Caterpillar Inc. | Mounting assembly for a reductant injector |
-
2015
- 2015-02-23 US US14/628,836 patent/US20160245142A1/en not_active Abandoned
-
2016
- 2016-02-18 CN CN201620125451.2U patent/CN205400860U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20160245142A1 (en) | 2016-08-25 |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20180218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |