CN105464765A - Mixer applied to tail gas aftertreatment - Google Patents
Mixer applied to tail gas aftertreatment Download PDFInfo
- Publication number
- CN105464765A CN105464765A CN201511018425.6A CN201511018425A CN105464765A CN 105464765 A CN105464765 A CN 105464765A CN 201511018425 A CN201511018425 A CN 201511018425A CN 105464765 A CN105464765 A CN 105464765A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- mixer
- cover unit
- embedded
- casing pipe
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a mixer applied to tail gas aftertreatment. The mixer comprises a casing pipe and two cover pieces. The pipe wall of the casing pipe is provided with a nozzle holder where a nozzle is installed. The two cover pieces are embedded into the two ends of the casing pipe and then a mixed cavity is formed in the middle section of the casing pipe. The nozzle holder is aligned to the mixed cavity. The top walls of both the two cover pieces are in a spiral shape. Airflow guiding faces are formed on the spiral faces of the top walls. Airflow from one end of the casing pipe can enter the mixed cavity along the airflow guiding face of the cover piece embedded into one end of the casing pipe, and the airflow in the mixed cavity can flow out along the airflow guiding face of the cover piece embedded into the other end of the casing pipe. By means of the mixer, a reducing agent and engine exhaust gas are sufficiently mixed to be uniform.
Description
Technical field
The present invention relates to mixer field, particularly a kind of mixer be applied in exhaust aftertreatment.
Background technique
Diesel engine emissions NO of the prior art
xafter-treatment system adopts selective reduction (SCR), and the working principle of this system is that reducing agent (concentration is the urea liquid of 32.5%) is sprayed into engine exhaust pipe, and urea decomposes becomes NH
3, NH
3and NO
xn is generated at SCR catalyst internal-response
2and water.Thus reach reduction motor NO
xthe object of discharge.In prior art, the mixing of reducing agent and engine exhaust does not generally all use mixer, mainly by ensureing that reducing agent sprays into the exhaust pipe length a little to guarantee both and mixes.
But prior art is mainly by ensureing that reducing agent sprays into the exhaust pipe length a little to guarantee that reducing agent mixes with engine exhaust, and its shortcoming is both undercompoundings; reaction efficiency is low; and outlet pipe is oversize, engine exhaust resistance is large, by the bad layout of spatial constraints on automobile.In addition, when the engine exhaust temperature of prior art is lower, partial reduction agent drops on outlet pipe inwall, because outlet pipe is by outwardly conduct radiation is ardent, exhaust pipe wall temperature reduces, and reducing agent is rebuffed thick decomposition not exclusively, occurs crystallization, macrocrystalline body is formed along with time history constantly accumulates, and then blocking outlet pipe.
The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of mixer be applied in exhaust aftertreatment, reducing agent is fully mixed with engine exhaust.
For achieving the above object, the invention provides a kind of mixer be applied in exhaust aftertreatment, this mixer comprises: sleeve pipe, and the tube wall of this sleeve pipe is provided with the nozzle carrier for installing nozzle; And two cover unit, these two cover unit are embedded in the two ends of described sleeve pipe respectively and then form mixing chamber at the intermediate section of described sleeve pipe, described mixing chamber aimed at by described nozzle carrier, the roof of two cover unit is spirality, the helicoid of this roof forms the guide face of air-flow, the air-flow coming from described sleeve pipe one end can enter described mixing chamber along the guide face of the cover unit being embedded in described sleeve pipe one end, and the air-flow in described mixing chamber can flow out along the guide face of the cover unit being embedded in the described sleeve pipe the other end.
Preferably, the spiral of described roof plays initial line and helix termination limit is connected by sidewall, and this sidewall is provided with the window that air feed flows through.
Preferably, the helicoid of described roof is provided with assisted ventilation hole.
Preferably, sheathed outer tube on the outer wall of described sleeve pipe.
Compared with prior art, the present invention has following beneficial effect: by the embedded cover unit in the two ends of sleeve pipe and cover unit, the intermediate section inwall of cover unit, cover unit and sleeve pipe surrounds mixing chamber, in addition the spirality guide face of cover unit and cover unit can make engine exhaust air-flow major part move towards in the shape of a spiral, considerably increase the distance that reducing agent mixes with engine exhaust, facilitate the full and uniform mixing of reducing agent and engine exhaust, shorten the length of pipe needed for prior art mixing simultaneously.In addition, outer tube can be wrapped up on the outer wall of sleeve pipe, effectively can avoid the crystallisation problems of reducing agent in inwall.
Accompanying drawing explanation
Fig. 1 is a kind of sectional view of the mixer of application according to the present invention in exhaust aftertreatment;
Fig. 2 is another sectional view of the mixer of application according to the present invention in exhaust aftertreatment;
Fig. 3 is the another sectional view of the mixer of application according to the present invention in exhaust aftertreatment.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 1 to Figure 3, according to a kind of mixer be applied in exhaust aftertreatment of the specific embodiment of the invention, this mixer comprises sleeve pipe 1 and two cover unit (21, 22), the tube wall of this sleeve pipe 1 is provided with the nozzle carrier 11 for installing nozzle, nozzle on nozzle carrier 11 is used for injection reduction agent, these two cover unit (21, 22) be embedded in the two ends of sleeve pipe 1 respectively and then form mixing chamber at the intermediate section of sleeve pipe 1, mixing chamber aimed at by nozzle carrier 11, two cover unit (21, 22) roof is spirality, the helicoid of this roof forms the guide face of air-flow, the air-flow coming from sleeve pipe 1 one end can enter mixing chamber along the guide face of the cover unit 21 being embedded in sleeve pipe 1 one end, air-flow in mixing chamber can flow out along the guide face of the cover unit 22 being embedded in sleeve pipe 1 the other end.
As a kind of preferred embodiment, the spiral of roof plays initial line and helix termination limit is connected by sidewall, and this sidewall is provided with the window (211,221) that air feed flows through.
As a kind of preferred embodiment, the helicoid of roof is provided with assisted ventilation hole (212,222).
As a kind of preferred embodiment, sheathed outer tube on the outer wall of sleeve pipe 1.
To sum up, the mixer be applied in exhaust aftertreatment of the present embodiment, by cover unit 21 embedded at the two ends of sleeve pipe 1 and cover unit 22, the intermediate section inwall of cover unit 21, cover unit 22 and sleeve pipe 1 surrounds mixing chamber, in addition the spirality guide face of cover unit 21 and cover unit 22 can make engine exhaust air-flow major part move towards in the shape of a spiral, considerably increase the distance that reducing agent mixes with engine exhaust, facilitate the full and uniform mixing of reducing agent and engine exhaust, shorten the length of pipe needed for prior art mixing simultaneously.In addition, outer tube can be wrapped up on the outer wall of sleeve pipe 1, effectively can avoid the crystallisation problems of reducing agent in inwall.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (4)
1. be applied to the mixer in exhaust aftertreatment, it is characterized in that, this mixer comprises:
Sleeve pipe, the tube wall of this sleeve pipe is provided with the nozzle carrier for installing nozzle; And
Two cover unit, these two cover unit are embedded in the two ends of described sleeve pipe respectively and then form mixing chamber at the intermediate section of described sleeve pipe, described mixing chamber aimed at by described nozzle carrier, the roof of two cover unit is spirality, the helicoid of this roof forms the guide face of air-flow, the air-flow coming from described sleeve pipe one end can enter described mixing chamber along the guide face of the cover unit being embedded in described sleeve pipe one end, and the air-flow in described mixing chamber can flow out along the guide face of the cover unit being embedded in the described sleeve pipe the other end.
2. the mixer be applied in exhaust aftertreatment according to claim 1, is characterized in that, the spiral of described roof plays initial line and helix termination limit is connected by sidewall, and this sidewall is provided with the window that air feed flows through.
3. the mixer be applied in exhaust aftertreatment according to claim 2, is characterized in that, the helicoid of described roof is provided with assisted ventilation hole.
4. the mixer be applied in exhaust aftertreatment according to claim 1, is characterized in that, sheathed outer tube on the outer wall of described sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018425.6A CN105464765A (en) | 2015-12-30 | 2015-12-30 | Mixer applied to tail gas aftertreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018425.6A CN105464765A (en) | 2015-12-30 | 2015-12-30 | Mixer applied to tail gas aftertreatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105464765A true CN105464765A (en) | 2016-04-06 |
Family
ID=55602861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511018425.6A Pending CN105464765A (en) | 2015-12-30 | 2015-12-30 | Mixer applied to tail gas aftertreatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105464765A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676153A (en) * | 2017-09-29 | 2018-02-09 | 天纳克汽富晟(长春)汽车零部件有限公司 | Engine exhaust post processing encapsulation |
| CN108915830A (en) * | 2016-06-13 | 2018-11-30 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement |
| CN109415964A (en) * | 2016-06-29 | 2019-03-01 | 罗伯特·博世有限公司 | The mixer apparatus of exhausted gas post-processing system for motor vehicle, exhausted gas post-processing system and motor vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201776091U (en) * | 2010-08-17 | 2011-03-30 | 广西玉柴机器股份有限公司 | Mixer |
| US20120216513A1 (en) * | 2009-06-19 | 2012-08-30 | Frederic Greber | Exhaust line with injection system |
| CN103270266A (en) * | 2010-10-18 | 2013-08-28 | 佛吉亚排气系统有限公司 | Motor vehicle exhaust line |
| CN205225398U (en) * | 2015-12-30 | 2016-05-11 | 广西玉柴机器股份有限公司 | Be applied to blender among exhaust aftertreatment |
-
2015
- 2015-12-30 CN CN201511018425.6A patent/CN105464765A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120216513A1 (en) * | 2009-06-19 | 2012-08-30 | Frederic Greber | Exhaust line with injection system |
| CN201776091U (en) * | 2010-08-17 | 2011-03-30 | 广西玉柴机器股份有限公司 | Mixer |
| CN103270266A (en) * | 2010-10-18 | 2013-08-28 | 佛吉亚排气系统有限公司 | Motor vehicle exhaust line |
| CN205225398U (en) * | 2015-12-30 | 2016-05-11 | 广西玉柴机器股份有限公司 | Be applied to blender among exhaust aftertreatment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915830A (en) * | 2016-06-13 | 2018-11-30 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement |
| CN108915830B (en) * | 2016-06-13 | 2019-11-08 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement |
| CN109415964A (en) * | 2016-06-29 | 2019-03-01 | 罗伯特·博世有限公司 | The mixer apparatus of exhausted gas post-processing system for motor vehicle, exhausted gas post-processing system and motor vehicle |
| US10914215B2 (en) | 2016-06-29 | 2021-02-09 | Robert Bosch Gmbh | Mixer device for an exhaust gas aftertreatment system of a motor vehicle, exhaust gas aftertreatment system, and motor vehicle |
| CN109415964B (en) * | 2016-06-29 | 2021-10-29 | 罗伯特·博世有限公司 | Mixer device for an exhaust gas aftertreatment system of a motor vehicle, exhaust gas aftertreatment system and motor vehicle |
| CN107676153A (en) * | 2017-09-29 | 2018-02-09 | 天纳克汽富晟(长春)汽车零部件有限公司 | Engine exhaust post processing encapsulation |
| CN107676153B (en) * | 2017-09-29 | 2024-04-19 | 天纳克富晟(长春)汽车零部件有限公司 | Engine exhaust aftertreatment packaging |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160406 |