CN108350782A - Reducing agent mixing arrangement - Google Patents
Reducing agent mixing arrangement Download PDFInfo
- Publication number
- CN108350782A CN108350782A CN201680062222.3A CN201680062222A CN108350782A CN 108350782 A CN108350782 A CN 108350782A CN 201680062222 A CN201680062222 A CN 201680062222A CN 108350782 A CN108350782 A CN 108350782A
- Authority
- CN
- China
- Prior art keywords
- reducing agent
- exhaust gas
- flow path
- swirl
- aqueous solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 151
- 238000002156 mixing Methods 0.000 title claims abstract description 58
- 239000007864 aqueous solution Substances 0.000 claims abstract description 70
- 239000002245 particle Substances 0.000 claims abstract description 35
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 description 99
- 238000006722 reduction reaction Methods 0.000 description 15
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000003467 diminishing effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003981 vehicle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000008135 aqueous vehicle Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- 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
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Abstract
Reducing agent mixing arrangement according to the present invention includes：Outer cover, front end are provided with exhaust gas inflow part, and rear end is equipped with selective reduction catalyst；Reductant nozzle sprays reducing agent aqueous solution between exhaust gas inflow part and the selective reduction catalyst described in the internal flow path to the outer cover；Swirl-flow devices, it is mounted on described in the internal flow path of the outer cover between exhaust gas inflow part and the selective reduction catalyst, the flow direction for the fluid that exhaust gas is mixed with reducing agent aqueous solution particle is guided with spiral shape, the flow path cross sectional area of the swirl-flow devices is smaller than the flow path cross sectional area of the outer cover.Reducing agent mixing arrangement according to the present invention, when making reducing agent aqueous solution be mixed with the exhaust gas of the engine emission of vehicle, the exhaust gas can be made with helical flow, during exhaust gas is flowed along helical flow paths, it is set to generate vortex, so as to make reducing agent aqueous solution more uniformly be mixed with exhaust gas, the mixed style formed after spatially compressing longer tubulose blending space is provided, therefore ensures that and is installed in narrow remaining space.
Description
Technical field
The present invention relates to a kind of exhaust gas for the engine emission for making vehicle with helical flow to ensure reducing agent aqueous solution
The reducing agent mixing arrangement that can effectively mix.Specifically, exactly a kind of mixing that can further increase reducing agent aqueous solution
Efficiency and can prevent reducing agent aqueous solution contact low temperature outermost wall after generate attachment phenomenon reducing agent mixing arrangement.
Background technology
In general, the exhaust gas of engine emission is led to catalyst-assembly (C of the configuration among exhaust pipe
Atalytic Converter) in purified, be discharged into air after making sound attenuation then through muffler.
This exhaust lay out is mounted on internal combustion engine (for example, diesel engine), including the system for making nitrogen oxides restore
And reducing agent (for example, reducing agent aqueous solution) injector that configuration is swum on this system.The urea jeting area most generally constituted
The selective reduction for being normally at the particle filter (the front has oxidation catalyst) of upstream and the nitrogen oxides in downstream is catalyzed
Agent (Selective Catalytic Reduction；SCR between).According to fairly common another scheme, in oxidation catalysis
Reducing agent jeting area is set between agent and SCR, the impregnation particle filter of nitrogen oxides reduction treatment is useful for behind the SCR
Or ordinary particle filter.
In order to ensure the correct operation of reducing agent injection, it is necessary to ensure reducing agent injection and evaporation, reducing agent with it is useless
The mixed function of gas so that reducing agent downstream module (block) suction plane fairly evenly to exhaust blast.In this feelings
Under condition, since the mixing of reducing agent and exhaust gas needs the regular hour, therefore considerably long reducing agent is needed to contact with each other with exhaust gas
Path.
As described above, in order to make contact path of the reducing agent with exhaust gas increase, scientific research personnel has developed a kind of " band
Have the exhaust lay out (Korean published Patent 10-2012-0053494) of spraying system ", exhaust gas can be made to rotate to outer
It encloses, and to the exhaust blast reducing agent of rotation.
But if only so that exhaust gas is rotated to periphery, contact path of the reducing agent with exhaust gas with regard to inadequate,
Thus leading to the mixing efficiency of raising reducing agent and exhaust gas, there are certain limitations.
In addition, if exhaust gas rotates and flow to periphery, it is mixed into reducing agent particle in exhaust gas under the influence of centrifugal force
It is contacted with outermost wall, since the temperature of outermost wall is relatively low, the reducing agent particle that will occur to contact with outermost wall is with drop
The phenomenon that state remains.
Detailed description of the invention
Technical problem to be solved
The present invention is exactly to research and develop in order to solve the above problem.The object of the present invention is to provide a kind of mixing of reducing agent
Device makes the exhaust gas with spiral shape from periphery when making reducing agent aqueous solution be mixed with the exhaust gas of the engine emission of vehicle
To center flow, exhaust gas along helical flow paths from periphery to center flow during by swirl-flow devices generate whirlpool
Stream, thus enables that reducing agent aqueous solution is more uniformly mixed with exhaust gas, to inhibit reducing agent to remain in drop state
Phenomenon on wall surface, and the mixed style formed after spatially compressing longer tubulose blending space is provided, thus really
Guarantor is installed in narrow remaining space.
The method for solving technical problem
To achieve the goals above, reducing agent mixing arrangement according to the present invention, including：Outer cover, front end are provided with useless
Gas inflow part, rear end is equipped with selective reduction catalyst；Reductant nozzle gives up described in the internal flow path to the outer cover
Reducing agent aqueous solution is sprayed between gas inflow part and the selective reduction catalyst；And swirl-flow devices, it is mounted on described
Between exhaust gas inflow part and the selective reduction catalyst described in the internal flow path of outer cover, inside be formed with by exhaust gas with
The flow path that the flow direction of the fluid of reducing agent aqueous solution particle mixing is guided from periphery to center with spiral shape.According to this
The reducing agent mixing arrangement of invention, by the fluid of the swirl-flow devices internal flow path along around the swirl-flow devices inside stream
The direction of Lu Zhizheng line generates vortex, and is flowed along the internal flow path length direction of the swirl-flow devices.
The swirl-flow devices, the 1st component installed by crossing the outer cover medial surface and to cover the 1st component
Mode the 2nd component in connection constitute, the 1st component, the edge combined with the medial surface of the outer cover by outboard end
Portion, and center knob prominent towards the exhaust gas inflow part and that opening portion is formed in side wall side are constituted, and the described 2nd
Component is made of side plate and upper plate, the side plate with will include the position to form the opening portion center knob side
The mode that a part for wall is surrounded is stood on the edge part, and the center knob is close in the side of width direction
Side wall, the other side of width direction are isolated with the side wall of the center knob；The upper plate is by the upper end of the side plate and institute
The upper end for stating center knob connects.
The swirl-flow devices include mixed gas inflow part, by the edge part, the side wall of the center knob, institute
The width direction other end and the upper plate for stating side plate surround, and the reductant nozzle is configured to towards the mixed gas
Inflow part sprays reducing agent aqueous solution.
Position corresponding with the medial surface of the side plate is formed with more than one through hole in the upper plate.
Width direction one end of the side plate is in connection at position corresponding with the one side edge of the opening portion.
In the lower end of the side plate it is formed with multiple connection bumps, the edge part has to connect with the connection bump
Link slot.
Invention effect
If using reducing agent mixing arrangement according to the present invention, when the engine emission for making reducing agent aqueous solution and vehicle
Exhaust gas mixing when, by making the exhaust gas with spiral shape from periphery to center flow, while in exhaust gas along helical flow
During path is flowed, it is set to generate vortex, so as to make reducing agent aqueous solution more uniformly be mixed with exhaust gas.
In addition, fundamentally blocking reducing agent to contact with the lower outermost wall of temperature by outer cover, so as to maximum limit
Degree ground reduces reducing agent and remains in the phenomenon on wall surface with drop state, provides from spatially by longer tubulose blending space pressure
The mixed style formed after contracting is therefore ensured that and is installed in narrow remaining space.
Description of the drawings
Fig. 1 and Fig. 2 is the stereogram and longitudinal section of reducing agent mixing arrangement according to the present invention；
Fig. 3 and Fig. 4 is the stereogram for the swirl-flow devices that reducing agent mixing arrangement according to the present invention is included；
Fig. 5 is the exploded perspective view for the swirl-flow devices that reducing agent mixing arrangement according to the present invention is included；
Fig. 6 is to indicate exhaust gas with reducing agent aqueous solution in reducing agent mixing arrangement internal flow direction according to the present invention
Schematic diagram；
Fig. 7 is the schematic diagram for indicating to be formed vortex shape along the direction for crossing swirl-flow devices internal flow path；
Fig. 8 is the exhaust flow pattern for indicating to realize by existing reducing agent mixing arrangement and reducing agent through the invention
The exhaust flow pattern schematic diagram that mixing arrangement is realized.
Specific implementation mode
The embodiment of reducing agent mixing arrangement according to the present invention is described in detail next, with reference to attached drawing.
Fig. 1 and Fig. 2 is the stereogram and longitudinal section of reducing agent mixing arrangement according to the present invention.
Reducing agent mixing arrangement according to the present invention, by selective reduction catalyst (Selective
Catalytic Reduction) or particle trap (Diesel Particular coated with selective reduction catalyst
Filter；DPF) injection reducing agent aqueous solution (for example, aqueous solution of urea), makes the NO for including in exhaust gasxIt is reduced to hydrogen and water,
It is characterized in that, exhaust gas is twist flowed from periphery to center, it may thereby be ensured that the reducing agent aqueous solution of injection will not only collect
In it is any a part on, but pass through exhaust gas entire flow path be equably allocated.
That is, reducing agent mixing arrangement according to the present invention, including：Outer cover 100, for the exhaust gas energy for ensuring from engine emission
It is enough to pass through, be formed as the pipeline configuration with internal flow path, its front end (right side in Fig. 2) is provided with exhaust gas inflow part 110,
(left side in Fig. 2) is provided with the catalyst for being inserted into installation SDPF (DPF for being coated with selective reduction catalyst) 10 in its back-end
Mounting portion 120；Reductant nozzle 200, into the internal flow path of the outer cover 100, exhaust gas inflow part 110 is installed with catalyst
Reducing agent aqueous solution is sprayed between portion 120；Swirl-flow devices 300 are mounted on reducing agent in the internal flow path of the outer cover 100 and spray
On the jet path (downside of reductant nozzle 200 in Fig. 2) of mouth 200.
The swirl-flow devices 300 make the fluid (hereinafter referred to as " mixed gas ") that exhaust gas is mixed with reducing agent aqueous solution particle
It twist flows, to increase the time of contact between reducing agent aqueous solution and exhaust gas, so that it is guaranteed that reducing agent aqueous solution particle
It can uniformly effectively be mixed with exhaust gas.As described above, if exhaust gas is between helical flow, with reducing agent aqueous solution
Time of contact will increase, it is possible thereby to mix with making reducing agent aqueous solution uniform particle, and allow reducing agent aqueous solution particle
It is equably in contact with it by the whole surface of SDPF, so as to improve NOxReduction efficiency.
In addition, it is another feature that, the swirl-flow devices 300 that the present invention is included not are to make by inside stream
The exhaust gas on road makes it with the diminishing spiral current of radius of turn with the helical flow with identical radius of turn
It is dynamic, while generating vortex in a manner of so that its encirclement is formed spiral exhaust gas flow circuits.Next, with reference to other attached drawings pair
Features described above is described in detail.
Fig. 3 and Fig. 4 is the stereogram for the swirl-flow devices 300 that reducing agent mixing arrangement according to the present invention is included, and Fig. 5 is
The exploded perspective view for the swirl-flow devices 300 that reducing agent mixing arrangement according to the present invention is included, Fig. 6 are to indicate exhaust gas and reduction
Schematic diagram of the agent aqueous solution in reducing agent mixing arrangement internal flow direction according to the present invention.Herein, in order to be explicitly shown
By the exhaust gas flow direction of swirl-flow devices 300, edge part 312 is omitted in figure 6.
If the radius of turn size of the vortex formed by swirl-flow devices 300 is identical as the internal diameter of outer cover 100, when useless
It, will be under the influence of centrifugal force to the inner wall side collection of outer cover 100 when gas is rotated with reducing agent aqueous solution particle with the vortex
In.Therewith, reducing agent aqueous solution particle cannot spread all over SDPF and integrally uniformly be contacted with it, may result in NOxReduction effect
Rate accordingly decreases.In addition, as described above, if reducing agent aqueous solution particle cannot all to SDPF transmit, and some
Reducing agent aqueous solution particle is attached on 100 inner wall of outer cover, then the reducing agent aqueous solution particle sprayed from reductant nozzle 200
It measures and touches and just will produce gap between the amount of the reducing agent aqueous solution particle on the surfaces SDPF.Reducing agent can be not only given as a result,
The setting of aqueous solution emitted dose brings difficulty, and also results in reducing agent aqueous solution and generate unnecessary waste, to increase
Add standing charges.
It is therefore preferred that reducing agent mixing arrangement according to the present invention is set to, make to generate by swirl-flow devices 300
Vortex the diminishing swirl pattern of radius of turn.
That is, the 1st component 310 that the swirl-flow devices 300 are installed by crossing 100 medial surface of the outer cover, and to hide
The mode of the front end of the 1st component 310 the 2nd component 320 composition in connection is covered, exhaust gas and reducing agent aqueous solution particle are made
Mixed mixed gas is flowed along between the 1st component 310 and the 2nd component 320, and forms the vortex of swirl pattern.This
In the case of, the edge part 312 that the 1st component 310 is combined by outboard end with the medial surface of the outer cover 100, and towards institute
Exhaust gas inflow part 110 is stated to protrude and be formed with the composition of center knob 314 of opening portion 316 in side wall side.In addition, described
2 components 320 include：Side plate 322 will include the side wall of the center knob 314 for the position to form the opening portion 316
The mode that a part is surrounded is stood on the edge part 312, and the center knob 314 is close in the side of width direction
Side wall, the other side of width direction is isolated with the side wall of the center knob 314；Upper plate 324, by the side plate 322
Upper end and the upper end of the center knob 314 connect.Therefore, the swirl-flow devices 300 include by the edge part
312, the side wall of the center knob 314, the width direction other end of the side plate 322 and the upper plate 324 surround
Mixed gas inflow part 326.
As described above, if being provided with swirl-flow devices 300, it is useless to what is flowed into inside outer cover 100 by exhaust gas inflow part 110
Gas passes through the mixed gas inflow part positioned at 300 side of swirl-flow devices like that as Fig. 3 to shown in fig. 5 dash-double-dot arrow
326 flow into, and after being mixed with reducing agent aqueous solution, by the insulating space between side plate 322 and center knob 314, then lead to
Opening portion 316 is crossed to be discharged to 120 side of catalyst mounting portion.In this case, the exhaust gas is passing through side plate 322 and center
During insulating space between protruding portion 314 can be rotated with spiral shape, be discharged to catalyst mounting portion 120 when
It waits, can also keep helical flow.Therefore, the reducing agent aqueous solution particle sprayed by reductant nozzle 200 reaches SDPF 10
It can be contacted for a long time with exhaust gas holding always before, thus, it is possible to the exhaust gas uniformly effectively mix, to
NO is improved to the maximum extentxReduction efficiency.
In addition, for the outer cover 100 for entering to have exhaust gas in interior effluent, compared with inside, the temperature in outside is very low.Cause
This, when reducing agent aqueous solution particle is directly contacted with the wall surface of outer cover 100, is just easy to attached in reducing agent mixed process
It on 100 wall surface of the outer cover.But for reducing agent mixing arrangement according to the present invention, since reducing agent mixes
It is to be completed between the 1st component 310 of swirl-flow devices 300 and the 2nd component 320, therefore the reducing agent aqueous solution and outer cover 100
Inner wall contact, and compared with the inner wall of outer cover 100, the temperature of the 1st component 310 and the 2nd component 320 is very high, therefore
The phenomenon that reducing agent aqueous solution is as drop is not will produce.That is, fundamentally blocking reducing agent lower with temperature by outer cover
Outermost wall contacts, and the phenomenon on wall surface is remained in so as to reducing reducing agent to the maximum extent with drop state.
As described above, if on inner wall of the reducing agent aqueous solution particle without being adhered to outer cover 100, from reductant nozzle
200 injection reducing agent aqueous solution particles amount and touch the surfaces SDPF reducing agent aqueous solution particle amount between would not
Generate too big gap.Therefore, it is very easy to be set to reducing agent aqueous solution emitted dose, prevent reducing agent aqueous solution from generating not
Necessary waste, so as to save standing charges.
In addition, the mixed gas that is mixed with reducing agent aqueous solution particle of exhaust gas is to being arranged in the mixed of 300 side of swirl-flow devices
It closes gas inflow part 326 to flow into, be formed after being vortexed, then rearward arranged in the opening portion 316 at 300 center of swirl-flow devices by being arranged
Go out, is flowed with the diminishing serpentine pattern of radius of turn.Therefore, be further reduced the reducing agent aqueous solution particle from
The phenomenon being attached under the action of mental and physical efforts on 100 inner wall of outer cover, and can obtain keeps reducing agent aqueous solution particle entire outer on the way
Cover 100 internal flow path and equally distributed effect.In addition, if mixed gas is with the diminishing spiral shape mould of radius of turn
Formula flows, then the mobility of the mixed gas will further increase, can be with helical flow to far.Thus, it is possible to
Further increase the mixed effect of reducing agent aqueous solution.
In addition, if being set as the injection direction of reductant nozzle 200 towards side plate 322 or center knob 314,
Then reducing agent aqueous solution particle will be attached on swirl-flow devices 300, thus not only result in waste, but also can reduce its with
The mixing efficiency of exhaust gas.
It is therefore preferred that being installed as the solid arrow as shown in Figure 3 of the reductant nozzle 200 like that towards mixing
Gas inflow part 326 sprays reducing agent aqueous solution.As described above, if the injection direction of reductant nozzle 200 is set as court
To mixed gas inflow part 326, then can reduce to the maximum extent because reducing agent aqueous solution particle is attached to swirl-flow devices 300
Surface and the wasting phenomenon occurred.
In addition, the flow path cross sectional area due to mixed gas inflow part 326 is smaller than the flow path cross sectional area of outer cover 100, work as
The moment that the exhaust gas inside outer cover 100 is flowed into mixed gas inflow part 326 is flowed through, the flow velocity of the exhaust gas can be promoted rapidly.
As described above, if reductant nozzle 200 is made to be configured to spray reducing agent aqueous solution particle towards mixed gas inflow part 326,
Then the reducing agent aqueous solution particle will be inhaled into mixed gas inflow part 326 at a very rapid rate and be mixed with exhaust gas,
So as to make reducing agent aqueous solution particle more efficiently be mixed with exhaust gas.
In addition, will produce a degree of exhaust back-pressure between the front and rear of swirl-flow devices 300.If the back of the body
Pressure value is higher, has been more than a reference value, then engine generate exhaust gas cannot be smoothly discharged out, thus can cause engine by
Damage, and generate various vibrations and noise.
Therefore, can more than one through hole 328 be set on the upper plate 324 of the swirl-flow devices 300.Institute as above
It states, if through hole 328 is arranged on upper plate 324, so that it may to flow through the part in the exhaust gas inside outer cover 100 via mixed
Gas inflow part 326 is closed by swirl-flow devices 300, and rest part in exhaust gas is made to be flowed directly into via through hole 328 to opening
Oral area 316, so as to reduce the back pressure to a certain degree.
In addition, as shown in this embodiment, if the inside in upper plate 324 with side plate 322 is arranged in the through hole 328
The corresponding position in face, the then exhaust gas flowed into the through hole 328 can be flowed along the medial surface of side plate 322, it is possible thereby to anti-
Only reducing agent aqueous solution included in mixed gas is attached on the medial surface of side plate 322.
Certainly, in the present embodiment, although illustrating only edge forming curves of the through hole 328 along upper plate 324
The case where shape, but the shape of the through hole 328 and position, number can be filled with the discharge pressure or eddy flow of exhaust gas
The variation for setting all many conditions such as 300 each position specification carries out numerous variations.
In addition, if between width direction one end of side plate 322 and the one side edge (upper edge in Fig. 5) of opening portion 316
It at a certain distance, then, can be in side plate 322 when the mixed gas opening 316 flowed by mixed gas inflow part 326
Width direction one end and the one side edge of opening portion 316 between the corner that is formed generate turbulent flow, thus lead to mixed gas not
It can smooth outflow.It is therefore preferred that being arranged width direction one end of the side plate 322 in the side with the opening portion 316
The corresponding position in edge is simultaneously in connection.
In addition, ensuring that the binding site between the 1st component 310 and the 2nd component 320 carries out certain draw
It leads, is formed with multiple connection bumps 323 in the lower end of the side plate 322, it is convex that the edge part 312 is formed with the connection connection
Play 323 link slot 313.As described above, if being formed with connection bump 323 and link slot 313, only by by the connection
The process that protrusion 323 is inserted into link slot 313 just can be such that the 2nd component 320 is accurately combined with the 1st component 310, so as to
The case where reducing 300 assembly failure of swirl-flow devices.
In addition, as shown in this embodiment, being inserted into link slot 313 if being configured to connection bump 323, the 1st component
Contact area between 310 and the 2nd component 320 will increase, thus when using hard solder (brazing) or hot-melt adhesive paste mode
When the 1st component 310 being made to be combined with the 2nd component 320, the binding force between the 1st component 310 and the 2nd component 320 will be carried significantly
It is high.
Fig. 7 is the schematic diagram for indicating to be formed vortex shape along the direction for crossing swirl-flow devices internal flow path, and Fig. 8 is to indicate
What the exhaust flow pattern and reducing agent mixing arrangement through the invention realized by existing reducing agent mixing arrangement were realized gives up
Flow of air pattern diagram.
The length direction of 300 internal flow path of the swirl-flow devices and the mixed gas stream flowed by exhaust gas inflow part 110
Dynamic direction arranges at a right angle, and not is along in swirl-flow devices 300 by the exhaust gas that mixed gas inflow part 326 flows into
Portion flow path length direction is flowed, but it is made to pass through center knob 314, side successively as dotted arrow as shown in Figure 7
Edge 312, side plate 322, upper plate 324 mode generate vortex, and on the whole twist flowing (along Fig. 3 to shown in fig. 5 double
Flow in dash-dot arrows direction), so as to make reducing agent aqueous solution more uniformly effectively mix.
In addition, if using existing reducing agent mixing arrangement, as shown in (a) in Fig. 8, exhaust gas is just with radius of turn phase
Same helical flow.But if using reducing agent mixing arrangement according to the present invention, as shown in (b) in Fig. 8, meeting
So that it is generated vortex, and flowed on the whole with the diminishing swirl pattern of radius of turn, i.e., helically from periphery to center
Shape flows, and to significantly improve the mobility of exhaust gas, that is, significantly improves the mixing efficiency of reducing agent aqueous solution.
In addition, in order to make reducing agent aqueous solution equably be mixed with exhaust gas, reducing agent aqueous solution and exhaust gas just must assure that
The distance flowed together reaches a reference value or more, for existing reducing agent mixing arrangement, must assure that reducing agent water
The flow path that solution flows together with exhaust gas, that is, the pipeline being mounted between catalyst-assembly and SCR are very long.But for according to
For reducing agent mixing arrangement according to the present invention, (b) in the fluid such as Fig. 8 by the swirl-flow devices internal flow path can be made
It is shown to be vortexed with being generated along the direction for surrounding swirl-flow devices internal flow path center line, while along the inside of the swirl-flow devices
It flows in flow path length direction.Therefore, even if above-mentioned pipeline is made to very short, sufficient flow distance is also ensured,
So as to make reducing agent aqueous solution equably be mixed with exhaust gas.That is, providing from spatially by longer tubulose blending space pressure
The mixed style formed after contracting is therefore ensured that and is installed in narrow remaining space.
More than, it is described the invention in detail using desirable embodiment.But the scope of the present invention not only office
It is limited to specific embodiment, should be explained according to following claims.In addition, generally knowing for grasping the technical field
For the technical staff of knowledge, a variety of revisions and deformation can be implemented in the range of without departing from technical thought of the invention completely.
Claims (according to the 19th article of modification of treaty)
1. a kind of reducing agent mixing arrangement, it is characterised in that：
Including：Outer cover, front end are provided with exhaust gas inflow part, and rear end is equipped with selective reduction catalyst；
Reductant nozzle, exhaust gas inflow part described in the internal flow path to the outer cover and the selective reduction catalyst it
Between spray reducing agent aqueous solution；And
Swirl-flow devices are mounted on exhaust gas inflow part described in the internal flow path of the outer cover and the selective reduction catalyst
Between, inside be formed with the flow direction of the fluid for mixing exhaust gas with reducing agent aqueous solution particle from periphery to center with spiral shell
The flow path that rotation shape guides,
It is produced along around the direction of the swirl-flow devices internal flow path center line by the fluid of the swirl-flow devices internal flow path
Raw vortex, and flowed along the internal flow path length direction of the swirl-flow devices.
2. reducing agent mixing arrangement according to claim 1, it is characterised in that：
The swirl-flow devices are constituted by the 1st component, and to cover the mode of the 1st component the 2nd component in connection,
1st component, the edge part combined with the medial surface of the outer cover by outboard end, and towards the exhaust gas inflow part
Center knob prominent and that opening portion is formed in side wall side is constituted,
2nd component is made of side plate and upper plate, and the side plate will be will include being formed in the position of the opening portion
The mode that a part for the side wall of heart protruding portion is surrounded is stood on the edge part, and the side of width direction is close to described
The side wall of center knob, the other side of width direction are isolated with the side wall of the center knob；The upper plate is by the side
The upper end of plate and the upper end of the center knob connect,
By the exhaust gas between the center knob and the side plate of the 2nd component of the 1st component, along spiral described
Flow path and from periphery towards center generate vortex.
3. reducing agent mixing arrangement according to claim 2, it is characterised in that：
The swirl-flow devices include mixed gas inflow part, by the edge part, the side wall of the center knob, the side
The width direction other end and the upper plate of plate surround, and the reductant nozzle is configured to flow into towards the mixed gas
Spray reducing agent aqueous solution in portion.
4. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Position corresponding with the medial surface of the side plate is formed with more than one through hole in the upper plate.
5. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Width direction one end of the side plate is in connection at position corresponding with the one side edge of the opening portion.
6. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Multiple connection bumps are formed in the lower end of the side plate, the edge part has the connection to connect with the connection bump
Slot.
Claims (6)
1. a kind of reducing agent mixing arrangement, it is characterised in that：
Including：Outer cover, front end are provided with exhaust gas inflow part, and rear end is equipped with selective reduction catalyst；
Reductant nozzle, exhaust gas inflow part described in the internal flow path to the outer cover and the selective reduction catalyst it
Between spray reducing agent aqueous solution；And
Swirl-flow devices are mounted on exhaust gas inflow part described in the internal flow path of the outer cover and the selective reduction catalyst
Between, inside be formed with the flow direction of the fluid for mixing exhaust gas with reducing agent aqueous solution particle from periphery to center with spiral shell
The flow path that rotation shape guides,
It is produced along around the direction of the swirl-flow devices internal flow path center line by the fluid of the swirl-flow devices internal flow path
Raw vortex, and flowed along the internal flow path length direction of the swirl-flow devices.
2. a kind of reducing agent mixing arrangement, it is characterised in that：
Including：Outer cover, front end are provided with exhaust gas inflow part, and rear end is equipped with selective reduction catalyst；
Reductant nozzle, exhaust gas inflow part described in the internal flow path to the outer cover and the selective reduction catalyst it
Between spray reducing agent aqueous solution；
Swirl-flow devices are mounted on exhaust gas inflow part described in the internal flow path of the outer cover and the selective reduction catalyst
Between, inside be formed with the flow direction of the fluid for mixing exhaust gas with reducing agent aqueous solution particle from periphery to center with spiral shell
The flow path that rotation shape guides,
It is produced along around the direction of the swirl-flow devices internal flow path center line by the fluid of the swirl-flow devices internal flow path
Raw vortex, and flowed along the internal flow path length direction of the swirl-flow devices.
3. reducing agent mixing arrangement according to claim 2, it is characterised in that：
The swirl-flow devices include mixed gas inflow part, by the edge part, the side wall of the center knob, the side
The width direction other end and the upper plate of plate surround, and the reductant nozzle is configured to flow into towards the mixed gas
Spray reducing agent aqueous solution in portion.
4. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Position corresponding with the medial surface of the side plate is formed with more than one through hole in the upper plate.
5. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Width direction one end of the side plate is in connection at position corresponding with the one side edge of the opening portion.
6. reducing agent mixing arrangement according to claim 2, it is characterised in that：
Multiple connection bumps are formed in the lower end of the side plate, the edge part has the connection to connect with the connection bump
Slot.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0027168 | 2016-03-07 | ||
| KR1020160027168A KR101744797B1 (en) | 2016-03-07 | 2016-03-07 | Apparatus for mixing reducing agent |
| PCT/KR2016/002871 WO2017155150A1 (en) | 2016-03-07 | 2016-03-22 | Reductant mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108350782A true CN108350782A (en) | 2018-07-31 |
| CN108350782B CN108350782B (en) | 2019-09-24 |
Family
ID=59219899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680062222.3A Expired - Fee Related CN108350782B (en) | 2016-03-07 | 2016-03-22 | Reducing agent mixing arrangement |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101744797B1 (en) |
| CN (1) | CN108350782B (en) |
| WO (1) | WO2017155150A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608775A (en) * | 2020-04-14 | 2020-09-01 | 广西玉柴机器股份有限公司 | Add blue blender structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101950601B1 (en) * | 2017-09-11 | 2019-02-22 | 대지금속 주식회사 | Mixing chamber unit for exhaust gas cleaning device |
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| EP2607641A1 (en) * | 2011-12-19 | 2013-06-26 | Mtu Friedrichshafen Gmbh | Mixer device for introducing a reducing agent to an exhaust gas flow with blade-shaped means |
| CN103370508A (en) * | 2010-12-15 | 2013-10-23 | 佛吉亚排气系统有限公司 | Exhaust line with device for injecting gaseous reagent |
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| JP2015075015A (en) | 2013-10-08 | 2015-04-20 | ダイムラー・アクチェンゲゼルシャフトＤａｉｍｌｅｒ ＡＧ | Casing structure for exhaust emission control device |
-
2016
- 2016-03-07 KR KR1020160027168A patent/KR101744797B1/en active IP Right Grant
- 2016-03-22 WO PCT/KR2016/002871 patent/WO2017155150A1/en active Application Filing
- 2016-03-22 CN CN201680062222.3A patent/CN108350782B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101784770A (en) * | 2007-08-21 | 2010-07-21 | 丰田自动车株式会社 | Exhaust system for internal combustion engine |
| CN102046939A (en) * | 2008-05-27 | 2011-05-04 | 日野自动车株式会社 | Exhaust emission purifier |
| CN103370508A (en) * | 2010-12-15 | 2013-10-23 | 佛吉亚排气系统有限公司 | Exhaust line with device for injecting gaseous reagent |
| EP2607641A1 (en) * | 2011-12-19 | 2013-06-26 | Mtu Friedrichshafen Gmbh | Mixer device for introducing a reducing agent to an exhaust gas flow with blade-shaped means |
| CN104040130A (en) * | 2012-01-12 | 2014-09-10 | 日野自动车株式会社 | Exhaust gas purification device |
| US20150240692A1 (en) * | 2014-02-25 | 2015-08-27 | Donaldson Company, Inc. | Exhaust aftertreatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111608775A (en) * | 2020-04-14 | 2020-09-01 | 广西玉柴机器股份有限公司 | Add blue blender structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108350782B (en) | 2019-09-24 |
| KR101744797B1 (en) | 2017-06-09 |
| WO2017155150A1 (en) | 2017-09-14 |
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