CN102913310A - SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) - Google Patents
SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) Download PDFInfo
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- CN102913310A CN102913310A CN2011102238171A CN201110223817A CN102913310A CN 102913310 A CN102913310 A CN 102913310A CN 2011102238171 A CN2011102238171 A CN 2011102238171A CN 201110223817 A CN201110223817 A CN 201110223817A CN 102913310 A CN102913310 A CN 102913310A
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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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Abstract
The invention discloses an SCR post-processing nozzle for increasing a conversion rate of NOx. The SCR post-processing nozzle is connected on a vehicle urea solution pipe and comprises a spray pipe and a spray nozzle arranged on the tail end of the spray pipe, wherein the spray nozzle is sequentially provided with a spray orifice, a mixing chamber and a spiral hole, which are mutually communicated from the outlet end to the spray pipe connecting end; the spray orifice is a circular hole coaxial with the tail end of the spray pipe; the mixing chamber is a chamber; the spiral hole is a spiral-shaped hole; and the upstream of the spiral hole is communicated with the tail end of the spray pipe, while the downstream of the spiral hole is communicated with the mixing chamber. According to the SCR post-processing nozzle for increasing conversion rate of NOx, a swirl groove is arranged in the spray nozzle, and the atomization effect can be enhanced by changing flow directions and velocities of the gas and the vehicle urea solution, so that the conversion rate of NOx can be greatly increased.
Description
Technical field
The present invention relates to the engine exhaust gas processing unit technical field, relate in particular a kind of SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen.
Background technique
Modern diesel engine emission regulation demands increasingly stringent, SCR (selective catalytic reduction) post-processing technology are to satisfy the technical measures that state IV and above Abgasgesetz must adopt.The SCR after-treatment system is comprised of catalyst converter, metering pump and SCR post-process nozzle, and nozzle is the important component part of this system, and the quality of nozzle atomization effect directly affects NO
xThe height of (nitrogen oxide) transformation efficiency, the especially height of low temperature conversion efficient and add what of indigo plant (automobile-used urea liquid) consumption are to determine whether important device up to standard of discharging.
Summary of the invention
The invention provides a kind of SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen, be provided with the eddy flow groove in shower nozzle inside, strengthen atomizing effect by changing gas with the flow direction and the speed of adding blue mixture, thereby greatly improve NO
xTransformation efficiency.
The present invention adopts following technological scheme to realize above-mentioned purpose: a kind of SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen, be connected on the blue tube, the shower nozzle that comprises jet pipe and be located at the jet pipe end, it is characterized in that, this shower nozzle extremely is provided with spray orifice, mixing chamber and the spiral hole that is interconnected with the jet pipe connecting end successively by outlet end, this spray orifice is and the terminal coaxial circular hole of jet pipe, this mixing chamber is a chamber, this spiral hole is a spiral helicine hole, this spiral hole upstream is communicated with jet pipe is terminal, and the downstream is communicated with mixing chamber.
As further specifying of such scheme:
Preferably, described shower nozzle comprises the welding cover, nozzle cage and eddy flow cell body, this welding cover is cylinder-like structure, this nozzle cage is tubular block shape structure, the closed end of this nozzle cage is provided with spray orifice, this eddy flow cell body is cylindrical structure, be provided with spiral chute at this cylindrical outer surface, this eddy flow cell body cooperates with the opening stomidium post of nozzle cage, make spiral chute and nozzle cage inwall consist of spiral hole, consist of mixing chamber between eddy flow cell body end and the nozzle cage internal surface bottom, this welding cover one end and the welding of jet pipe end seal, the other end is connected with the outer surface of nozzle cage opening end, and spiral hole upstream and jet pipe end is communicated with.
Preferably, described spiral fluted groove width is 2.5～3.5mm, and groove depth is 0.5～1mm, and lead angle is 30 °～40 °.
Preferably, the diameter 1mm of described spray orifice.
Preferably, described jet pipe middle part is provided with heat-proof device, this heat-proof device comprises collet, heat insulation cover plate and thermal insulation ceramics, this collet is the cone tubular structure, this heat insulation cover plate is that round-meshed cover plate shape structure is established at the middle part, the small end of this collet is socketed on the jet pipe, and large end cooperates with heat insulation cover plate on being socketed in jet pipe, and this thermal insulation ceramics is filled in the collet.
Preferably, the terminal bending of described jet pipe at right angles.
Preferably, described heat insulation cover plate is provided with the identity device of the terminal overbending direction of indication jet pipe.
Preferably, described identity device is the locating stud that is connected on the collet.
Preferably, described jet pipe starting point is provided with the connecting sleeve that cooperates with blue tube, this connecting sleeve one end and the welding of jet pipe starting point, and the other end and blue tube are pegged graft.
Preferably, described welding manner is soldering.
The beneficial effect that the present invention adopts above technological scheme to reach is:
1. SCR post-process nozzle of the present invention is provided with spiral hole and mixing chamber in shower nozzle inside, spray orifice is single circular hole, atomizing effect is than traditional single hole better effects if, not only be easy to purge, low temperature conversion efficient is high, and good reliability, simple in structure, be easy to install.
2. SCR post-process nozzle of the present invention is provided with heat-proof device at jet pipe, also can carry out installation and maintenance even Jet Pipe Temperature is higher, and be provided with the locating stud that mark is used at heat-proof device, affect transformation efficiency to prevent the anti-loaded flow direction of upsetting of shower nozzle direction.
3. SCR post-process nozzle of the present invention is provided with connecting sleeve at the jet pipe starting point, is used for and the blue tube grafting, and overexertion damages parts in the time of can not only preventing from nozzle is installed, and can also strengthen the sealability of joint.
Description of drawings
Fig. 1 is the structural representation of SCR post-process nozzle of the present invention;
Fig. 2 is the plan view of SCR post-process nozzle of the present invention;
Fig. 3 is the plan view of SCR post-process nozzle of the present invention;
Fig. 4 is the sectional view of B-B face among Fig. 3;
Fig. 5 is the sectional view of C-C face among Fig. 3;
Fig. 6 is to be comparative trial column diagram under 40000L/h, 250 ℃ of conditions of temperature in air speed;
Fig. 7 is to be comparative trial column diagram under 40000L/h, 350 ℃ of conditions of temperature in air speed.
Description of reference numerals:
The 1-shower nozzle, the 2-jet pipe, the 3-heat-proof device, the 4-blue tube, the 5-collet, the heat insulation cover plate of 6-, the 7-locating stud, the 8-connecting sleeve, the 9-thermal insulation ceramics, the 11-spray orifice, the 12-mixing chamber, the 13-spiral hole, the 14-nozzle cage, 15-eddy flow cell body, 16-welds cover.
Embodiment
For further setting forth 26S Proteasome Structure and Function of the present invention, below in conjunction with accompanying drawing and preferred embodiment the present invention is elaborated, but be to be understood that protection scope of the present invention is not subjected to the restriction of embodiment.
Fig. 1 is the structural representation of SCR post-process nozzle of the present invention, and as shown in FIG., this nozzle is plugged on the blue tube 4, includes bending rectangular jet pipe 2, soldering at shower nozzle 1, the heat-proof device 3 of soldering on another side jet pipe 2 of jet pipe 2 ends.
Fig. 2 and Fig. 3 are respectively plan view and the plan views of SCR post-process nozzle of the present invention, as shown in FIG., this heat-proof device 3 comprises collet 5, heat insulation cover plate 6 and thermal insulation ceramics 9, this collet 5 is the cone tubular structure, this heat insulation cover plate 6 is established round-meshed cover plate shape structure for the middle part, the small end of this collet 5 is enclosed within on the jet pipe 2 and soldering connects, large end cooperates with heat insulation cover plate 6 on being enclosed within jet pipe 2, this thermal insulation ceramics 9 is filled in the collet 5, outer rim at heat insulation cover plate 6 is connected with a locating stud 7 that is used to indicate jet pipe 2 terminal overbending directions, affects transformation efficiency to prevent the anti-loaded flow direction of upsetting of shower nozzle 1 direction.Starting point at jet pipe 2 also is provided with a connecting sleeve 8 that cooperates with blue tube 4, these connecting sleeve 8 one ends are connected with jet pipe 2 starting point solderings, the other end and blue tube 4 pegged graft, and overexertion damages parts when preventing from nozzle is installed, and strengthens the sealability of joint.
Fig. 4 is the sectional view of B-B face among Fig. 3, and this sectional view is the sectional view of heat-proof device 3, and this figure gives expression to the annexation between collet 5, heat insulation cover plate 6 and the thermal insulation ceramics 9 of heat-proof device 3 in more detail.
Fig. 5 is the sectional view of C-C face among Fig. 3, the sectional view of shower nozzle 1 namely, as shown in FIG., this shower nozzle 1 comprises welding cover 16, nozzle cage 14 and eddy flow cell body 15, this welding cover 16 is cylinder-like structure, this nozzle cage 14 is tubular block shape structure, the closed end of this nozzle cage 14 is provided with the circular spray orifice 11 that a diameter is 1mm, this eddy flow cell body 15 is cylindrical structure, be provided with spiral chute at this cylindrical outer surface, this spiral fluted groove width is 3mm, groove depth is 1mm, lead angle is 35 °, and this eddy flow cell body 15 cooperates with the opening stomidium post of nozzle cage 14, makes spiral chute and nozzle cage 14 inwalls consist of spiral hole 13, consist of mixing chamber 12 between eddy flow cell body 15 ends and the nozzle cage 14 internal surfaces bottom, these welding cover 16 1 ends are connected with jet pipe 2 end seal solderings, and the other end is connected with the outer surface soldering of nozzle cage 14 opening ends, make spiral hole 13 upstreams and 2 terminal connections of jet pipe.
SCR post-process nozzle of the present invention has that low temperature conversion efficient is high, good reliability, be easy to the advantages such as installation, Fig. 6 and Fig. 7 are respectively nozzle of the present invention and the laboratory data column diagram of other two kinds of nozzles under different experimental conditions, the experimental condition of Fig. 6 is that catalyst temperature is 250 ℃, adding blue air speed is 40000L/h, as shown in FIG., common batch of transformation efficiency that produces nozzle is 38%, spray orifice 11 is 40.1% for the transformation efficiency of the nozzle of single 1mm circular hole, and nozzle transformation efficiency of the present invention is 47.7%; The experimental condition of Fig. 7 is that catalyst temperature is 350 ℃, adding blue air speed is 40000L/h, and as shown in FIG., common batch of transformation efficiency that produces nozzle is 79.7%, spray orifice 11 is 83.8% for the transformation efficiency of the nozzle of single 1mm circular hole, and nozzle transformation efficiency of the present invention is 84.4%.By these two charts as can be known, SCR post-process nozzle of the present invention is no matter be that transformation efficiency all is higher than existing nozzle at 250 ℃ low temperature or under 350 ℃ high temperature condition.
Only for one of preferred embodiment of the present invention, can not limit to the present invention with this shown in the above embodiment of the present invention and the accompanying drawing, under the condition that does not break away from marrow of the present invention, any change that those skilled in the art do all belongs to protection scope of the present invention.
Claims (10)
1. SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen, be connected on the blue tube, the shower nozzle that comprises jet pipe and be located at the jet pipe end, it is characterized in that, to being provided with successively spray orifice, mixing chamber and the spiral hole that is interconnected with the jet pipe connecting end, this spray orifice is and the terminal coaxial circular hole of jet pipe this shower nozzle by outlet end, this mixing chamber is a chamber, this spiral hole is a spiral helicine hole, and this spiral hole upstream is communicated with jet pipe is terminal, and the downstream is communicated with mixing chamber.
2. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 1, it is characterized in that, described shower nozzle comprises the welding cover, nozzle cage and eddy flow cell body, this welding cover is cylinder-like structure, this nozzle cage is tubular block shape structure, the closed end of this nozzle cage is provided with spray orifice, this eddy flow cell body is cylindrical structure, be provided with spiral chute at this cylindrical outer surface, this eddy flow cell body cooperates with the opening stomidium post of nozzle cage, this spiral chute and nozzle cage inwall consist of spiral hole, consist of mixing chamber between eddy flow cell body end and the nozzle cage internal surface bottom, this welding cover one end and the welding of jet pipe end seal, the other end is connected with the outer surface of nozzle cage opening end.
3. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 2 is characterized in that, described spiral fluted groove width is 2.5～3.5mm, and groove depth is 0.5～1mm, and lead angle is 30 °～40 °
4. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 1 and 2 is characterized in that, the diameter 1mm of described spray orifice.
5. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 1 and 2, it is characterized in that, described jet pipe middle part is provided with heat-proof device, this heat-proof device comprises collet, heat insulation cover plate and thermal insulation ceramics, this collet is the cone tubular structure, and this heat insulation cover plate is that round-meshed cover plate shape structure is established at the middle part, and the small end of this collet is socketed on the jet pipe, large end cooperates with heat insulation cover plate on being socketed in jet pipe, and this thermal insulation ceramics is filled in the collet.
6. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 5 is characterized in that, the terminal bending of described jet pipe at right angles.
7. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 6 is characterized in that, described heat insulation cover plate is provided with the identity device of the terminal overbending direction of indication jet pipe.
8. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 7 is characterized in that, described identity device is the locating stud that is connected on the collet.
9. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 3 is characterized in that, described jet pipe starting point is provided with the connecting sleeve that cooperates with blue tube, this connecting sleeve one end and the welding of jet pipe starting point, and the other end and blue tube are pegged graft.
10. according to claim 2 or the SCR post-process nozzle of 9 described raising transformation efficiency of the oxides of nitrogen, it is characterized in that, described welding manner is soldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102238171A CN102913310A (en) | 2011-08-05 | 2011-08-05 | SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102238171A CN102913310A (en) | 2011-08-05 | 2011-08-05 | SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) |
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| Publication Number | Publication Date |
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| CN102913310A true CN102913310A (en) | 2013-02-06 |
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|---|---|---|---|
| CN2011102238171A Pending CN102913310A (en) | 2011-08-05 | 2011-08-05 | SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948273A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea injection system |
| CN104948276A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea ejector |
| CN105386831A (en) * | 2015-12-10 | 2016-03-09 | 广西玉柴机器股份有限公司 | Nozzle in marine engine tail gas treatment system |
| CN106437962A (en) * | 2015-08-07 | 2017-02-22 | 康明斯排放处理公司 | Converging liquid reductant injector nozzle in selective catalytic reduction systems |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111562A1 (en) * | 2000-10-10 | 2003-06-19 | Hubert Stier | Fuel injection valve |
| US20100314470A1 (en) * | 2009-06-11 | 2010-12-16 | Stanadyne Corporation | Injector having swirl structure downstream of valve seat |
| CN201871432U (en) * | 2010-09-25 | 2011-06-22 | 苏州派格力减排系统有限公司 | Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system |
| CN202202935U (en) * | 2011-08-05 | 2012-04-25 | 广西玉柴机器股份有限公司 | SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide |
-
2011
- 2011-08-05 CN CN2011102238171A patent/CN102913310A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030111562A1 (en) * | 2000-10-10 | 2003-06-19 | Hubert Stier | Fuel injection valve |
| US20100314470A1 (en) * | 2009-06-11 | 2010-12-16 | Stanadyne Corporation | Injector having swirl structure downstream of valve seat |
| CN201871432U (en) * | 2010-09-25 | 2011-06-22 | 苏州派格力减排系统有限公司 | Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system |
| CN202202935U (en) * | 2011-08-05 | 2012-04-25 | 广西玉柴机器股份有限公司 | SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948273A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea injection system |
| CN104948276A (en) * | 2015-05-13 | 2015-09-30 | 中国重汽集团济南动力有限公司 | Air assisting type urea ejector |
| CN106437962A (en) * | 2015-08-07 | 2017-02-22 | 康明斯排放处理公司 | Converging liquid reductant injector nozzle in selective catalytic reduction systems |
| US11585253B2 (en) | 2015-08-07 | 2023-02-21 | Cummins Emission Solutions Inc. | Converging liquid reductant injector nozzle in selective catalytic reduction systems |
| CN105386831A (en) * | 2015-12-10 | 2016-03-09 | 广西玉柴机器股份有限公司 | Nozzle in marine engine tail gas treatment system |
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Application publication date: 20130206 |