CN107366566A - Engine exhaust aftertreatment assembly - Google Patents
Engine exhaust aftertreatment assembly Download PDFInfo
- Publication number
- CN107366566A CN107366566A CN201610316201.1A CN201610316201A CN107366566A CN 107366566 A CN107366566 A CN 107366566A CN 201610316201 A CN201610316201 A CN 201610316201A CN 107366566 A CN107366566 A CN 107366566A
- Authority
- CN
- China
- Prior art keywords
- guide shell
- engine exhaust
- exhaust aftertreatment
- assembly
- reducing agent
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- 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
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of engine exhaust aftertreatment assembly, it includes exhaust gas intake port, oxidized form catalyst, grain catcher, selective catalytic reducing agent and air exit.The engine exhaust aftertreatment assembly also includes the first guide shell positioned at the selective catalytic reducing agent both ends with the second guide shell and connects the mixer tube assembly of first guide shell and second guide shell.The oxidized form catalyst, the grain catcher and the selective catalytic reducing agent are mutually aligned along first straight line, and the mixer tube assembly is located at the side of the first straight line and parallel with the first straight line.The mixer tube assembly of the present invention can form eddy flow, in favor of realizing that exhaust uniformly mixes with urea droplets.
Description
Technical field
The present invention relates to a kind of engine exhaust aftertreatment assembly.
Background technology
Engine exhaust aftertreatment assembly (such as diesel exhaust aftertreatment component) is primarily used to locate
Poisonous and harmful substance device in reason or exhaust of evolving.Harmful toxic matter in exhaust is mainly comprising hydrocarbon
Compound, carbon monoxide, nitrogen oxides and particulate matter etc..
Have in the prior art using oxidized form catalyst (DOC), grain catcher (DPF)
And selective catalytic reducing agent (SCR) combined scheme improves the efficiency of pump-down process.
In a kind of scheme, the oxidized form catalyst is arranged in series in the first housing with grain catcher
It is interior；The selective catalytic reducing agent is arranged in second shell body；Then by connecting pipe by institute
First, second housing is stated to be together in series.When matching the engine of small displacement, oxidized form catalytic conversion
Device, grain catcher and selective catalytic reducing agent usually require to configure " one " font post processing system
System.This structure generally requires the cylinder grown very much, and border can not meet that requiring and be unfavorable for high efficiency mixes
The arrangement of clutch.
The content of the invention
It is an object of the invention to provide a kind of exhaust can be made uniformly to be mixed with the urea liquid after atomization
The engine exhaust aftertreatment assembly of conjunction.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of engine exhaust post processing group
Part, it includes exhaust gas intake port, the oxidized form catalyst connected with the exhaust gas intake port, positioned at institute
State the grain catcher in the downstream of oxidized form catalyst, positioned at the downstream of the grain catcher
Selective catalytic reducing agent and the air exit positioned at the downstream of the selective catalytic reducing agent, institute
Engine exhaust aftertreatment assembly is stated also including the first end positioned at the selective catalytic reducing agent
First guide shell, the second guide shell positioned at the second end of the selective catalytic reducing agent and connection
The mixer tube assembly of first guide shell and second guide shell, wherein the first guide shell position
Connected in the downstream of the grain catcher and with the grain catcher, first guide shell is not straight
Connect and be connected with the first end of the selective catalytic reducing agent；Second guide shell is located at institute
State the upstream of selective catalytic reducing agent and be connected with the selective catalytic reducing agent；The oxidation
Type catalyst, the grain catcher and the selective catalytic reducing agent are mutual along first straight line
Alignment, the mixer tube assembly are located at the side of the first straight line and parallel with the first straight line.
As further improved technical scheme of the present invention, the mixer tube assembly includes at least partly extending
Enter the mixing tube in first guide shell, the mixing tube includes hollow inner chamber body, is centered around institute
State peripheral and circumferentially distributed some fins of inner chamber body, corresponding to some fins and with it is described
Some flutings of inner chamber body connection and positioned at the side of the fin and away from second import
Some perforates.
As further improved technical scheme of the present invention, the end wall of first guide shell is provided with nozzle
Installation portion, the nozzle mounting portion is close to some perforates.
As further improved technical scheme of the present invention, first guide shell and second guide shell
Structure it is similar.
As further improved technical scheme of the present invention, the air exit perpendicular to it is described be vented into
Mouthful.
As further improved technical scheme of the present invention, the both sides of the grain catcher are provided with Method for Installation
It is blue in order to dismantling the grain catcher.
As further improved technical scheme of the present invention, the mixer tube assembly is also described including being socketed in
The outer tube of mixing tube periphery.
As further improved technical scheme of the present invention, the mixer tube assembly is also described including being filled in
Heat insulation foam between mixing tube and the outer tube.
As further improved technical scheme of the present invention, the fluting is formed after the fin as described in punching press
, the perforate is uniformly distributed circumferentially in the periphery of the inner chamber body.
As further improved technical scheme of the present invention, deflector is installed in second guide shell,
The deflector is included to the inclined diversion division of the selective catalytic reducing agent.
Compared to prior art, the present invention is by the urea liquid that is gushed out from nozzle in mixing tube
The exhaust being vortexed in cavity is surrounded, and is directly contacted so as to avoid urea with inwall, is reduced crystallization
Risk.The exhaust of vortex can improve the uniformity mixed with the urea droplets being atomized.In addition,
The arrangement of the present invention can increase mixing distance, improve the efficiency of pump-down process.
Brief description of the drawings
Fig. 1 is the schematic perspective view of inventive engine exhaust aftertreatment component.
Fig. 2 is the front view of another angles of Fig. 1.
Fig. 3 is Fig. 1 part isometric exploded view.
Fig. 4 is to remove the stereogram in Fig. 3 after oxidized form catalyst and grain catcher.
Fig. 5 is Fig. 4 three-dimensional exploded view.
Fig. 6 is the three-dimensional exploded view of another angles of Fig. 5.
Fig. 7 is the diagrammatic cross-section of the line A-A along Fig. 2.
Embodiment
It please join shown in Fig. 1 to Fig. 7, present invention is disclosed a kind of engine exhaust aftertreatment assembly 100,
It include exhaust gas intake port 1, the oxidized form catalyst (DOC) 2 connected with the exhaust gas intake port 1,
Grain catcher (DPF) 3 positioned at the downstream of the oxidized form catalyst 2, positioned at described
Grain trap 3 downstream selective catalytic reducing agent (SCR) 4 and urged positioned at the selectivity
Change the air exit 5 in the downstream of reducing agent 4.In illustrative embodiments of the present invention, the exhaust
Outlet 5 is perpendicular to the exhaust gas intake port 1.In addition, the engine exhaust aftertreatment assembly 100 of the present invention
Also include the first guide shell 6 of the first end 41 positioned at the selective catalytic reducing agent 4, positioned at institute
The second guide shell 7 and connection described first for stating the second end 42 of selective catalytic reducing agent 4 are led
Flow cartridge 6 and the mixer tube assembly 8 of second guide shell 7, wherein first guide shell 6 is located at
The downstream of the grain catcher 3 and connected with the grain catcher 3, first guide shell 6
The not direct first end 41 with the selective catalytic reducing agent 4 is connected；Described second leads
Flow cartridge 7 be located at the upstream of the selective catalytic reducing agent 4 and with the selective catalytic reducing agent 4
It is connected；The oxidized form catalyst 2, the grain catcher 3 and the selective catalysis
Reducing agent 4 is mutually aligned along first straight line L, and the mixer tube assembly 8 is located at the first straight line L
Side and parallel with the first straight line L.
In illustrative embodiments of the present invention, for the ease of dismounting grain catcher 3 to be cleared up,
The both sides of the grain catcher 3 are equipped with mounting flange 31,32.
It please join shown in Fig. 4 to Fig. 7, the structure of first guide shell 6 and second guide shell 7
It is similar, in order to sharing die, save cost.In illustrative embodiments of the present invention, described
One guide shell 6 and second guide shell 7 include the Part I that is relatively large in diameter with corresponding load
Body phase connects and the less Part II of diameter with mixer tube assembly 8 to be engaged.Scheme in the present invention
In the embodiment shown, the end wall 61 of first guide shell 6 is provided with to install urea nozzle
The nozzle mounting portion 62 of (not shown).The urea nozzle into the mixer tube assembly 8 spraying
The urea droplets of atomization are penetrated, to be sufficiently mixed with exhaust.
It please join shown in Fig. 5 to Fig. 7, the mixer tube assembly 8 includes extending at least partially into described the
Mixing tube 81 in one guide shell 6 and the outer tube 82 for being socketed in the periphery of mixing tube 81.It is preferred that
Ground, it is incubated to reduce noise and realize, the mixer tube assembly 8 also includes being filled in the mixing
Heat insulation foam between pipe 81 and the outer tube 82.The mixing tube 81 is cylindrical, during it includes
The inner chamber body 811 of sky, the peripheral and circumferentially distributed some fins for being centered around the inner chamber body 811
812nd, corresponding to some fins 812 and some flutings 813 connected with the inner chamber body 811,
And positioned at the side of the fin 812 and close to some perforates 814 of nozzle mounting portion 62.At this
In invention embodiment illustrated, formed after 813 fins 812 as described in punching press of the fluting,
The perforate 814 is uniformly distributed circumferentially in the periphery of the inner chamber body 811.It please join shown in Fig. 5,
The fin 812 arranges along certain angle, so that be vented through after the fluting 813, can
Good vortex is formed in the inner chamber body 811.
It please join shown in Fig. 7, deflector 71, the deflector are installed in second guide shell 7
71 are included to the inclined diversion division 711 of the selective catalytic reducing agent 4.
Please join shown in the arrow in Fig. 7, during work, the exhaust that is come out from engine first from be vented into
Mouthful 1 enters, then in turn through oxidized form catalyst 2 and grain catcher 3, into the
In one guide shell 6；When reaching injection conditions, urea nozzle directly sprays into the urea liquid of atomization
In inner chamber body 811.In illustrative embodiments of the present invention, the nozzle mounting portion 62 is close to institute
State some perforates 814.Due to the urea liquid ejected from the urea nozzle, away from spout
Position easily form dead band, easily cause to crystallize, after the solution of the present invention, the opening position
Urea liquid can be flowed out from the perforate 814, so as to reduce the risk of urea crystals.
Then, the exhaust bag being vortexed from the urea liquid that urea nozzle gushes out in the inner chamber body 811
Enclose, directly contacted so as to avoid urea with inwall, reduce the risk of crystallization.The exhaust energy of vortex
It is enough to improve the uniformity mixed with the urea liquid being atomized, so as to improve the effect of pump-down process
Rate, the solution of the present invention is set to disclosure satisfy that the requirement of tightened up Abgasgesetz.Then, mixed with urea
Exhaust after conjunction moves on along mixer tube assembly 8, into the second guide shell 7, and in water conservancy diversion
Enter selective catalytic reducing agent 4 under the guiding of plate 71.In the process, the runner of the present invention is passed through
Design, exhaust and the mixing distance of urea droplets are added, improve the uniformity of mixing.Finally,
Exhaust after processing is left from air exit 5.
In addition, above example is merely to illustrate the present invention and not limits technology described in the invention
Scheme, understanding of this description should be such as " preceding based on person of ordinary skill in the field
Run through afterwards " refer to what is be through before other parts are not installed, then for example to "front", "rear",
The description of "left", "right", " on ", " under " isotropy, although this specification is with reference to upper
The embodiment stated is to present invention has been detailed description, still, one of ordinary skill in the art
It should be appreciated that person of ordinary skill in the field still can modify or be equal to the present invention
Replace, and all do not depart from technical scheme and its improvement of the spirit and scope of the present invention, all should cover
In scope of the presently claimed invention.
Claims (10)
1. a kind of engine exhaust aftertreatment assembly, it includes exhaust gas intake port, connected with the exhaust gas intake port
Logical oxidized form catalyst, the granule capturing positioned at the downstream of the oxidized form catalyst
Device, the selective catalytic reducing agent positioned at the downstream of the grain catcher and positioned at the selectivity
The air exit in the downstream of catalytic reducer, it is characterised in that：The engine exhaust aftertreatment assembly
Also include the first guide shell of the first end positioned at the selective catalytic reducing agent, positioned at the selection
Property catalytic reducer the second end the second guide shell and connection first guide shell and described the
The mixer tube assembly of two guide shells, wherein first guide shell is located at the downstream of the grain catcher
And connected with the grain catcher, first guide shell is not direct with the SCR
The first end of agent is connected；Second guide shell is located at the upper of the selective catalytic reducing agent
Swim and be connected with the selective catalytic reducing agent；The oxidized form catalyst, the particle
Trap is mutually aligned with the selective catalytic reducing agent along first straight line, the mixer tube assembly position
In the side of the first straight line and parallel with the first straight line.
2. engine exhaust aftertreatment assembly as claimed in claim 1, it is characterised in that：It is described mixed
Closing tube assembly includes extending at least partially into the mixing tube in first guide shell, the mixing tube bag
Include hollow inner chamber body, be centered around peripheral and circumferentially distributed some fins, right of the inner chamber body
Some fins described in Ying Yu and some flutings for being connected with the inner chamber body and positioned at the fin
Side and some perforates away from second import.
3. engine exhaust aftertreatment assembly as claimed in claim 2, it is characterised in that：Described
The end wall of one guide shell is provided with nozzle mounting portion, and the nozzle mounting portion is close to some perforates.
4. engine exhaust aftertreatment assembly as claimed in claim 1, it is characterised in that：Described
One guide shell is similar with the structure of second guide shell.
5. engine exhaust aftertreatment assembly as claimed in claim 1, it is characterised in that：The row
Gas exit normal is in the exhaust gas intake port.
6. engine exhaust aftertreatment assembly as claimed in claim 1, it is characterised in that：Described
The both sides of grain trap are provided with mounting flange in order to dismantle the grain catcher.
7. engine exhaust aftertreatment assembly as claimed in claim 2, it is characterised in that：It is described mixed
Close the outer tube that tube assembly also includes being socketed in the mixing tube periphery.
8. engine exhaust aftertreatment assembly as claimed in claim 7, it is characterised in that：It is described mixed
Close the heat insulation foam that tube assembly also includes being filled between the mixing tube and the outer tube.
9. engine exhaust aftertreatment assembly as claimed in claim 2, it is characterised in that：It is described to open
Groove is formed after the fin as described in punching press, and the perforate is uniformly distributed circumferentially in the inner chamber body
Periphery.
10. engine exhaust aftertreatment assembly as claimed in claim 1, it is characterised in that：It is described
Deflector is installed, the deflector includes inclining to the selective catalytic reducing agent in the second guide shell
Oblique diversion division.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316201.1A CN107366566A (en) | 2016-05-13 | 2016-05-13 | Engine exhaust aftertreatment assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316201.1A CN107366566A (en) | 2016-05-13 | 2016-05-13 | Engine exhaust aftertreatment assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107366566A true CN107366566A (en) | 2017-11-21 |
Family
ID=60304093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610316201.1A Pending CN107366566A (en) | 2016-05-13 | 2016-05-13 | Engine exhaust aftertreatment assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107366566A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150250A (en) * | 2018-01-04 | 2018-06-12 | 中国第汽车股份有限公司 | A kind of integrated form equipment for after-treatment |
| CN110374729A (en) * | 2019-07-11 | 2019-10-25 | 东风商用车有限公司 | A kind of box aftertreatment mixer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2002986C2 (en) * | 2009-06-09 | 2010-12-13 | Daf Trucks Nv | DEVICE FOR AFTER TREATMENT OF EXHAUST GAS FROM A DIESEL BURNING ENGINE. |
| US20120260635A1 (en) * | 2007-06-21 | 2012-10-18 | Daimler Trucks North America Llc | Treatment of diesel engine exhaust |
| CN203856551U (en) * | 2013-04-10 | 2014-10-01 | 珀金斯发动机有限公司 | Mixer module and exhaust cleaning module |
| CN204312165U (en) * | 2014-12-19 | 2015-05-06 | 天纳克（苏州）排放系统有限公司 | Engine exhaust after-treatment system |
| WO2015126353A1 (en) * | 2014-02-18 | 2015-08-27 | Faurecia Emissions Control Technologies, Usa, Llc | Plenum chamber for exhaust system |
| CN105089750A (en) * | 2015-08-21 | 2015-11-25 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment device |
| CN205779138U (en) * | 2016-05-13 | 2016-12-07 | 天纳克（苏州）排放系统有限公司 | Engine exhaust aftertreatment assembly |
-
2016
- 2016-05-13 CN CN201610316201.1A patent/CN107366566A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120260635A1 (en) * | 2007-06-21 | 2012-10-18 | Daimler Trucks North America Llc | Treatment of diesel engine exhaust |
| NL2002986C2 (en) * | 2009-06-09 | 2010-12-13 | Daf Trucks Nv | DEVICE FOR AFTER TREATMENT OF EXHAUST GAS FROM A DIESEL BURNING ENGINE. |
| CN203856551U (en) * | 2013-04-10 | 2014-10-01 | 珀金斯发动机有限公司 | Mixer module and exhaust cleaning module |
| WO2015126353A1 (en) * | 2014-02-18 | 2015-08-27 | Faurecia Emissions Control Technologies, Usa, Llc | Plenum chamber for exhaust system |
| CN204312165U (en) * | 2014-12-19 | 2015-05-06 | 天纳克（苏州）排放系统有限公司 | Engine exhaust after-treatment system |
| CN105089750A (en) * | 2015-08-21 | 2015-11-25 | 天纳克（苏州）排放系统有限公司 | Exhaust gas treatment device |
| CN205779138U (en) * | 2016-05-13 | 2016-12-07 | 天纳克（苏州）排放系统有限公司 | Engine exhaust aftertreatment assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150250A (en) * | 2018-01-04 | 2018-06-12 | 中国第汽车股份有限公司 | A kind of integrated form equipment for after-treatment |
| CN110374729A (en) * | 2019-07-11 | 2019-10-25 | 东风商用车有限公司 | A kind of box aftertreatment mixer |
| CN110374729B (en) * | 2019-07-11 | 2024-05-10 | 东风商用车有限公司 | Box type post-treatment mixer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171121 |
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| RJ01 | Rejection of invention patent application after publication |