CN104747256A - Urea mixer in exhaust gas emission system of diesel car - Google Patents
Urea mixer in exhaust gas emission system of diesel car Download PDFInfo
- Publication number
- CN104747256A CN104747256A CN201310740203.XA CN201310740203A CN104747256A CN 104747256 A CN104747256 A CN 104747256A CN 201310740203 A CN201310740203 A CN 201310740203A CN 104747256 A CN104747256 A CN 104747256A
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- Prior art keywords
- mixer
- urea
- tube
- exhaust gas
- cover plate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a component of an exhaust device of a diesel car, in particular to a urea mixer in an exhaust gas emission system of the diesel car. The urea mixer is characterized in that a hush tube is arranged in the mixer; the front and back ends of the mixer are respectively connected to a front cover plate and a back cover plate; the mixer is set as a right-angled triangular tube; the front end of the triangular tube is welded on the front cover plate; and the back end of the triangular tube is welded to the back cover plate. As the hush tube is arranged in the triangular tube-shaped mixer, the triangular tube-shaped mixer can form mixed gas to an eddy current; the eddy current facilitates full and uniform mixing of mixed gas of urea atomized liquid and exhaust gas; and compared with a straight tube-shaped SCR emission device, the urea mixer obviously improves the full mixing effect of the urea and the exhaust gas. The urea mixer is simple and compact in structure, and provides reliable technical support for design and production of the SCR emission device system with more reasonability, completion and convenience for use and maintenance.
Description
Technical field
The present invention relates to the component of diesel car venting gas appliance, especially about the urea mixer in a kind of diesel automobile exhaust releasing system.
Background technique
The reduction exhaust emissions technology of current use has two kinds, the SCR(selective catalytic reduction by the outer catalyzing and reducing nitrogen oxides of emission controls by improving combustion particulate and machine) technology, another kind is the EGR(engines exhaust gas recirculation by emission controls by improving combustion nitrogen oxide) and machine pass through particulate trap filter particulates technology outward.For the needs that adaptation heavy-duty diesel oil commercial car and large diesel engine enforcement state IV emission standard specify, the reality of the aspects such as the Economy of runing in conjunction with supply and the vehicle production of China Diesel and vehicular emission standards, for reducing the discharge of above-mentioned diesel car and diesel engine nitrogen oxide, in the after-treatment system that heavy-duty diesel oil commercial car and large diesel engine are vented, have employed " SCR " technology.So-called " SCR " technology, refers to selectivity (Selective) and catalysis (Catalytic) and (Reduction) system of reduction.Its concrete technical pattern in the releasing system of vehicle exhaust, increases urea-spray device and set up catalyst converter in hush tube.SCR system working procedure is by spraying in outlet pipe after jet pump and nozzle atomization by urea liquid again, mix in outlet pipe and hush tube with tail gas, mixed gas enters catalyst converter, under the acting in conjunction that the alum of urea atomized liquid on high-temperature gas and catalyst converter in tail gas is catalyst based, accelerated decomposition becomes ammonia, nitrogen oxide in ammonia and tail gas reacts again, generates nitrogen and discharges, thus reduce the content of nitrogen oxide in tail gas so that reach emission standard.
Common SCR system structure is primarily of compositions such as outlet pipe, suction tude, hush tubes, wherein urea-spray mouth is directly installed on outlet pipe, and urea has corrosivity causes outlet pipe and silencing apparatus also must adopt the corrosion resistant stainless steel material of high cost, importantly because of urea atomized liquid mix with tail gas not exclusively insufficient, and cause the discharge amount of nitrogen oxide in tail gas to exceed state specified standards, and bring certain pollution to atmosphere environment.
Summary of the invention
Object of the present invention is for overcoming in existing diesel automobile exhaust releasing system existing structural imperfection and deficiency, and proposes a kind ofly to make the full and uniform mixer mixed of diesel automobile exhaust and urea atomized soln.The present invention realizes by following technological scheme: the urea mixer in a kind of diesel automobile exhaust releasing system, comprise hush tube, it is characterized in that hush tube is located in mixer, the front end and back end of blender connects respectively and is equipped with front shroud and back shroud, and front shroud is respectively equipped with main aperture and secondary orifices connecing the position of putting mixer front end; Mixer is set to the triangular pipe of a rectangular shape, and the front end of triangular pipe is welded in front shroud, and the rear end of triangular pipe is welded with back shroud; Main aperture is set to and connects hush tube and wear the circular hole of joining, and secondary orifices is located at the side of main aperture; Front dividing plate is provided with a secondary orifices; Front dividing plate is provided with two secondary orifices.
By the urea mixer that such scheme is implemented, owing to hush tube being installed in the tubular mixer of triangle, can make to enter the urea atomized liquid of hush tube and the mixed gas of tail gas by suction tude, mixing full and uniform in a mixer, and mixed gas and other cavitys can be made to separate, contrast former SCR tapping equipment, significantly enhance urea and tail gas mixed effect cmpletely.Mixed uniformly high-temperature gas is conducive to the catalytic reaction of downstream, provides effective fondational structure for improving aminating reaction efficiency.Structure of the present invention is simple and direct, compact, for manufacturing and designing more rationally, improving and working service SCR tapping equipment system easily, provides useful technical support.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
Embodiment
Embodiment is by reference to the accompanying drawings described in further detail.Hush tube 1 is located in the tubular mixer of triangle 3, the front end and back end of blender triangular pipe 3 connects respectively and is equipped with front shroud 2 and back shroud 4, front shroud 2 connect the triangle position of putting mixer triangular pipe 3 front end be respectively equipped with main aperture (main aperture because of with hush tube 1 cross-under, therefore, figure slightly shows) and two secondary orifices 20 and 21, two secondary orifices are located at the side of main aperture respectively, and the front end of triangular pipe 3 is welded in front shroud 1, and the rear end of triangular pipe 3 is welded with back shroud 4.For convenience of processing technology by said for the present embodiment mixer apparatus in SCR releasing system, front dividing plate 1 is arranged to the similar triangle plate of mixer tubular to triangle by the present embodiment, and hush tube 1, the tubular mixer of triangle 3 weld formed holistic urea mixer with welding procedure by this triangle plate respectively.In actual use, mixed gas enters mixer 3 by hush tube 1 through bloop 10, through being expelled to next component flow process by two secondary orifices 20 and 21 after fully mixing.
Claims (5)
1. the urea mixer in a diesel automobile exhaust releasing system, comprise hush tube, it is characterized in that hush tube is located in mixer, the front end and back end of blender connects respectively and is equipped with front shroud and back shroud, and front shroud is respectively equipped with main aperture and secondary orifices connecing the position of putting mixer front end.
2., by the urea mixer in diesel automobile exhaust releasing system described in claim 1, it is characterized in that mixer is set to the triangular pipe of a rectangular shape, the front end of triangular pipe is welded in front shroud, and the rear end of triangular pipe is welded with back shroud.
3., by the urea mixer in diesel automobile exhaust releasing system described in claim 1, it is characterized in that main aperture is set to and connects hush tube and wear the circular hole of joining, secondary orifices is located at the side of main aperture.
4., by the urea mixer in diesel automobile exhaust releasing system described in claim 1 or 3, it is characterized in that front dividing plate is provided with a secondary orifices.
5., by the urea mixer in diesel automobile exhaust releasing system described in claim 1 or 4, it is characterized in that front dividing plate is provided with two secondary orifices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310740203.XA CN104747256A (en) | 2013-12-27 | 2013-12-27 | Urea mixer in exhaust gas emission system of diesel car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310740203.XA CN104747256A (en) | 2013-12-27 | 2013-12-27 | Urea mixer in exhaust gas emission system of diesel car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747256A true CN104747256A (en) | 2015-07-01 |
Family
ID=53587433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310740203.XA Pending CN104747256A (en) | 2013-12-27 | 2013-12-27 | Urea mixer in exhaust gas emission system of diesel car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747256A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009869A1 (en) * | 1998-08-11 | 2000-02-24 | Siemens Aktiengesellschaft | Device for catalytic exhaust gas purification |
| CN101074620A (en) * | 2006-05-19 | 2007-11-21 | J.埃贝斯佩歇合资公司 | Exhausting back treating device for internal combustion engine |
| JP2008082253A (en) * | 2006-09-28 | 2008-04-10 | Nissan Diesel Motor Co Ltd | Structure for liquid reducer injection nozzle |
| JP2008248746A (en) * | 2007-03-29 | 2008-10-16 | Tokyo Roki Co Ltd | Muffler with exhaust emission control function |
| CN202001087U (en) * | 2011-01-14 | 2011-10-05 | 苏州市申达汽车配件有限公司 | Automobile exhaust after-treatment device through selective catalytic reduction |
-
2013
- 2013-12-27 CN CN201310740203.XA patent/CN104747256A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009869A1 (en) * | 1998-08-11 | 2000-02-24 | Siemens Aktiengesellschaft | Device for catalytic exhaust gas purification |
| CN101074620A (en) * | 2006-05-19 | 2007-11-21 | J.埃贝斯佩歇合资公司 | Exhausting back treating device for internal combustion engine |
| JP2008082253A (en) * | 2006-09-28 | 2008-04-10 | Nissan Diesel Motor Co Ltd | Structure for liquid reducer injection nozzle |
| JP2008248746A (en) * | 2007-03-29 | 2008-10-16 | Tokyo Roki Co Ltd | Muffler with exhaust emission control function |
| CN202001087U (en) * | 2011-01-14 | 2011-10-05 | 苏州市申达汽车配件有限公司 | Automobile exhaust after-treatment device through selective catalytic reduction |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150701 |