CN108131182A - For the mixer of SCR post processings - Google Patents
For the mixer of SCR post processings Download PDFInfo
- Publication number
- CN108131182A CN108131182A CN201711410699.9A CN201711410699A CN108131182A CN 108131182 A CN108131182 A CN 108131182A CN 201711410699 A CN201711410699 A CN 201711410699A CN 108131182 A CN108131182 A CN 108131182A
- Authority
- CN
- China
- Prior art keywords
- mixer
- mixing chamber
- closure plate
- post processings
- scr post
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of mixer for SCR post processings, including mixing chamber, the urea spraying entrance that the mixing chamber input terminal offers gas inlet and is inclined outwardly, with being densely covered with conduction hole on the cavity wall of the mixing chamber of gas inlet homonymy, the output terminal of the mixing chamber is equipped with exhaust outlet, closure plate gets lodged in the exhaust ports, and gas vent is densely covered on the closure plate.The mixer can avoid urea crystals, promote flow field uniformity, improve transformation efficiency.
Description
Technical field
The present invention relates to diesel engine vent gas processing equipment technical fields, and in particular to a kind of mixing for SCR post processings
Device.
Background technology
Increasingly strict with diesel engine emissions regulations, exhaust aftertreatment technology is the technical measures that must be used.And SCR
（Selective catalytic reduction system operating）It disclosure satisfy that state IV and state's V discharge standards, the basic principle of SCR are to pass through urea injection system
（It is commonly called as urea pump）It sprays into exhaust pipe after the aqueous solution of urea of 32.5% concentration is atomized and is mixed with motor exhaust, urea water
Solution generates ammonia by pyrolysis and hydrolysis（NH3）, under the effect of the catalyst ammonia by diesel engine vent gas be harmful to
Oxynitrides（NOx）It is converted into harmless nitrogen (N2) and water, the top priority of motor exhaust treatment technology SCR routes be
Make tail gas and the effective hybrid concurrency of ammonia mist is biochemical reacts, while ensure sufficient temp before catalyst is entered.
But the mixer of the prior art for SCR post processings leads to urea often because urea granules crush insufficient
Particle packing not only influences flow field uniformity on conduit wall so that transformation efficiency is lower, and if things go on like this can also damage equipment.
Invention content
In order to solve the deficiencies in the prior art, the present invention provides a kind of mixer for SCR post processings, described
Mixer can avoid urea crystals, promote flow field uniformity, improve transformation efficiency.
According to technical solution provided by the invention, a kind of mixer for SCR post processings is described including mixing chamber
The urea spraying entrance that mixing chamber input terminal offers gas inlet and is inclined outwardly, the mixing chamber with gas inlet homonymy
Cavity wall on be densely covered with conduction hole, the output terminal of the mixing chamber is equipped with exhaust outlet, and closure plate gets lodged in the exhaust ports, institute
It states and gas vent is densely covered on closure plate.
Further, several conduction holes gather forms trapezoidal shape on the cavity wall of mixing chamber, and trapezoidal shape draws
Discharge orifice regional center is located on the extended line of urea spraying entrance center.
Further, the exhaust outlet edge is spaced apart equipped with square groove.
Further, the mixing chamber input terminal is additionally provided with venthole.
Further, the gas vent is circumferentially distributed along the edge of closure plate.
Further, the kidney slot radially extended to closure plate center is further opened on the closure plate.
Further, the aperture of the conduction hole is：6~10mm.
Further, the aperture of the gas vent is：6~10mm.
It can be seen that the mixer post-processed provided by the present invention for SCR from the above, compared with prior art,
Has advantages below：The present invention can not only guide urea spraying and the mixed airflow of tail gas, can crush larger urea spray
Mist particle prevents urea from being crystallized on the cavity wall of mixing chamber, additionally it is possible to increase gas flow rate, promote flow field uniformity, carry
Rise transformation efficiency.
Description of the drawings
Fig. 1 is the stereogram of the present invention.
Fig. 2 is the front view of the present invention.
Fig. 3 is the side view of the present invention.
Fig. 4 is the structure diagram of closure plate of the present invention.
1. gas inlet, 2. urea spraying entrance, 3. mixing chambers, 3-1. conduction holes, 4. exhaust outlets, 4-1. square grooves,
5. closure plate, 5-1. gas vents, 5-2. kidney slots, 6. ventholes.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.Wherein identical parts are presented with like reference characters.Need what is illustrated
It is that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to the direction in attached drawing.It uses
Word " interior " and " outer " refer respectively to towards or away from the direction of particular elements geometric center.
A kind of mixer for SCR post processings, including mixing chamber 3,3 input terminal of mixing chamber offers tail gas
Entrance 1 and the urea spraying entrance 2 being inclined outwardly, the urea spraying entrance 2 is for injection urea spraying thereto, with tail gas
Conduction hole 3-1 is densely covered on the cavity wall of the mixing chamber 3 of 1 homonymy of entrance, the output terminal of the mixing chamber 3 is equipped with exhaust outlet
4, closure plate 5 is got lodged at the exhaust outlet 4, and gas vent 5-1 is densely covered on the closure plate 5, the mixing chamber with 1 homonymy of gas inlet
Conduction hole 3-1 is densely covered on 3 cavity wall, the urea spraying that mixing chamber 3 is entered from urea spraying entrance 2 can be with entrance
Tail gas in mixing chamber 3 is sufficiently mixed, and the conduction hole 3-1 regions can not only guide urea spraying and the gaseous mixture of tail gas
Stream, additionally it is possible to which broken larger urea spraying granule prevents urea from being crystallized on the cavity wall of mixing chamber 3.The mixing chamber
The output terminal of body 3 is exhaust outlet 4, and closure plate 5 is got lodged at the exhaust outlet 4, and 5 edge of closure plate is circumferentially densely covered with gas vent 5-1,
The gas vent 5-1 circumferentially to gather along 5 edge of closure plate can not only guide air-flow to prevent urea granules from accumulating, additionally it is possible to increase gas
Flow velocity promotes flow field uniformity.
Preferably, several conduction hole 3-1 gather forms trapezoidal shape on the cavity wall of mixing chamber 3, trapezoidal shape
Conduction hole 3-1 regional centers are located on the extended line at 2 center of urea spraying entrance.The conduction hole 3-1 regions of trapezoidal shape can be big
Gas flow rate promotes flow field uniformity, avoids urea crystals, promotes transformation efficiency.
Preferably, 4 edge of exhaust outlet is spaced apart equipped with square groove 4-1.The square hole can purge the urine of accumulation
Crude granule reduces urea crystals risk.
Preferably, 3 input terminal of mixing chamber is additionally provided with venthole 6.
Preferably, the kidney slot 5-2 radially extended to 5 center of closure plate is further opened on the closure plate 5.The kidney slot 5-
2 can avoid urea crystals, prevent urea granules from accumulating.
Preferably, the aperture of the conduction hole 3-1 is：6~10mm.The aperture of the gas vent 5-1 is：6~10mm.It can
Substantially effectively crush larger urea spraying granule.
Those of ordinary skills in the art should understand that：The above is only a specific embodiment of the present invention, and
The limitation present invention is not used in, all any modification, equivalent substitution, improvement and etc. within the purport of the present invention, done should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of mixer for SCR post processings, which is characterized in that including mixing chamber（3）, the mixing chamber（3）It is defeated
Enter end and offer gas inlet（1）With the urea spraying entrance being inclined outwardly（2）, with gas inlet（1）The mixing chamber of homonymy
（3）Cavity wall on be densely covered with conduction hole（3-1）, the mixing chamber（3）Output terminal be equipped with exhaust outlet（4）, closure plate（5）It is stifled
In the exhaust outlet（4）Place, the closure plate（5）On be densely covered with gas vent（5-1）.
2. as described in claim 1 for the mixer of SCR post processings, which is characterized in that several conduction holes（3-1）It gathers mixed
Close cavity（3）Cavity wall on form trapezoidal shape, the conduction hole of trapezoidal shape（3-1）Regional center is located at urea spraying entrance（2）
On the extended line at center.
3. as described in claim 1 for the mixer of SCR post processings, which is characterized in that the exhaust outlet（4）Edge is spaced apart
Equipped with square groove（4-1）.
4. as described in claim 1 for the mixer of SCR post processings, which is characterized in that the mixing chamber（3）Input terminal is also
Equipped with venthole（6）.
5. as described in claim 1 for the mixer of SCR post processings, which is characterized in that the gas vent（5-1）Along closure plate
（5）Edge it is circumferentially distributed.
6. for the mixer of SCR post processings as described in claim 1 or 5, which is characterized in that the closure plate（5）On also open up
Have radially to closure plate（5）The kidney slot of center extension（5-2）.
7. as described in claim 1 for the mixer of SCR post processings, which is characterized in that the conduction hole（3-1）Aperture
For：6~10mm.
8. as described in claim 1 for the mixer of SCR post processings, which is characterized in that the gas vent（5-1）Aperture
For：6~10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410699.9A CN108131182A (en) | 2017-12-23 | 2017-12-23 | For the mixer of SCR post processings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410699.9A CN108131182A (en) | 2017-12-23 | 2017-12-23 | For the mixer of SCR post processings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108131182A true CN108131182A (en) | 2018-06-08 |
Family
ID=62391706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711410699.9A Pending CN108131182A (en) | 2017-12-23 | 2017-12-23 | For the mixer of SCR post processings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108131182A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339913A (en) * | 2018-11-19 | 2019-02-15 | 南京朗森自动化设备有限公司 | A kind of adaptive urea mixer |
| CN110578582A (en) * | 2019-09-30 | 2019-12-17 | 潍柴动力股份有限公司 | SCR aftertreatment pipeline structure and diesel vehicle |
| CN112096490A (en) * | 2019-06-18 | 2020-12-18 | 罗伯特·博世有限公司 | Exhaust system and method for feeding fluid into an exhaust channel of an exhaust system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321724A (en) * | 2013-07-09 | 2013-09-25 | 潍柴动力股份有限公司 | SCR catalyzing silencer and hybrid tube device of SCR catalyzing silencer |
| CN103334818A (en) * | 2013-07-09 | 2013-10-02 | 潍柴动力股份有限公司 | SCR catalyzing silencer and mixing tube device thereof |
| CN203347898U (en) * | 2013-07-08 | 2013-12-18 | 潍柴动力股份有限公司 | Integrated selective catalytic reduction (SCR) catalytic silencer |
| CN104121081A (en) * | 2014-07-02 | 2014-10-29 | 潍柴动力股份有限公司 | Air inlet pipe of SCR tail gas processing system and SCR tail gas processing system |
| CN204827615U (en) * | 2015-07-27 | 2015-12-02 | 天纳克（苏州）排放系统有限公司 | Double -deck hybrid tube and exhaust back processing apparatus thereof |
| CN205297699U (en) * | 2015-12-17 | 2016-06-08 | 潍柴动力股份有限公司 | Mixing arrangement that admits air of SCR system |
| CN205445746U (en) * | 2016-02-17 | 2016-08-10 | 潍柴动力股份有限公司 | Mixer for promoting atomization of aqueous solution of urea |
| CN105065093B (en) * | 2015-08-10 | 2017-11-10 | 潍柴动力股份有限公司 | A kind of SCR system and its blender |
-
2017
- 2017-12-23 CN CN201711410699.9A patent/CN108131182A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203347898U (en) * | 2013-07-08 | 2013-12-18 | 潍柴动力股份有限公司 | Integrated selective catalytic reduction (SCR) catalytic silencer |
| CN103321724A (en) * | 2013-07-09 | 2013-09-25 | 潍柴动力股份有限公司 | SCR catalyzing silencer and hybrid tube device of SCR catalyzing silencer |
| CN103334818A (en) * | 2013-07-09 | 2013-10-02 | 潍柴动力股份有限公司 | SCR catalyzing silencer and mixing tube device thereof |
| CN104121081A (en) * | 2014-07-02 | 2014-10-29 | 潍柴动力股份有限公司 | Air inlet pipe of SCR tail gas processing system and SCR tail gas processing system |
| CN204827615U (en) * | 2015-07-27 | 2015-12-02 | 天纳克（苏州）排放系统有限公司 | Double -deck hybrid tube and exhaust back processing apparatus thereof |
| CN105065093B (en) * | 2015-08-10 | 2017-11-10 | 潍柴动力股份有限公司 | A kind of SCR system and its blender |
| CN205297699U (en) * | 2015-12-17 | 2016-06-08 | 潍柴动力股份有限公司 | Mixing arrangement that admits air of SCR system |
| CN205445746U (en) * | 2016-02-17 | 2016-08-10 | 潍柴动力股份有限公司 | Mixer for promoting atomization of aqueous solution of urea |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339913A (en) * | 2018-11-19 | 2019-02-15 | 南京朗森自动化设备有限公司 | A kind of adaptive urea mixer |
| CN109339913B (en) * | 2018-11-19 | 2023-10-20 | 南京朗森自动化设备有限公司 | Self-adaptive urea mixer |
| CN112096490A (en) * | 2019-06-18 | 2020-12-18 | 罗伯特·博世有限公司 | Exhaust system and method for feeding fluid into an exhaust channel of an exhaust system |
| CN110578582A (en) * | 2019-09-30 | 2019-12-17 | 潍柴动力股份有限公司 | SCR aftertreatment pipeline structure and diesel vehicle |
| CN110578582B (en) * | 2019-09-30 | 2021-01-15 | 潍柴动力股份有限公司 | SCR aftertreatment pipeline structure and diesel vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106523092B (en) | The conical surface type eddy flow urea mixing devices of page two | |
| CN207945006U (en) | Side air inlet spar-type platforms SCR mixing arrangements | |
| CN206016920U (en) | Urea injection mixed cell for diesel engine vent gas post processing | |
| WO2018153162A1 (en) | Tail gas post-treatment apparatus | |
| CN108397262A (en) | Light-duty diesel vehicle oblique cutting eddy flow mix aperture pipe post-processes encapsulating structure | |
| WO2015130789A1 (en) | Exhaust aftertreatment device | |
| CN108131182A (en) | For the mixer of SCR post processings | |
| WO2014032052A1 (en) | Reductant injection and mixing system | |
| CN108087067A (en) | Eddy flow urea mixing device | |
| CN110735693B (en) | Urea mixer for exhaust aftertreatment | |
| CN106523091B (en) | Page window type eddy flow urea mixing device | |
| CN206158826U (en) | SCR aftertreatment hybrid chamber structure of integrated nozzle | |
| CN105822396A (en) | Urea mixing device and SCR (Selective Catalytic Reduction) system | |
| CN107559078A (en) | Tail-gas after treatment apparatus | |
| CN110332034A (en) | It is vertically arranged SCR post-processing urea mixing device | |
| CN205297699U (en) | Mixing arrangement that admits air of SCR system | |
| US9551255B2 (en) | Mixing plate as stabilizer for ammonia gas injector | |
| CN107939490A (en) | Axis post-processes double-cyclone urea mixing device into nozzle integrated form SCR | |
| CN207686804U (en) | Eddy flow urea mixing device | |
| CN104847463A (en) | Nozzle integrated SCR post treatment unit and method thereof | |
| CN204961035U (en) | SCR system and blender thereof | |
| CN207686808U (en) | Side post-processes urea mixing device into nozzle integrated form SCR | |
| CN207686807U (en) | Vent gas treatment urea mixing device | |
| WO2013112170A1 (en) | Cross style (4 port) ammonia gas injector | |
| CN108150255B (en) | Treating fluid mixing device for vehicle tail gas treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20180608 |
|
| RJ01 | Rejection of invention patent application after publication |