CN202202935U - SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide - Google Patents
SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide Download PDFInfo
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- CN202202935U CN202202935U CN2011202836734U CN201120283673U CN202202935U CN 202202935 U CN202202935 U CN 202202935U CN 2011202836734 U CN2011202836734 U CN 2011202836734U CN 201120283673 U CN201120283673 U CN 201120283673U CN 202202935 U CN202202935 U CN 202202935U
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- nozzle
- jet pipe
- transformation efficiency
- oxides
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Abstract
The utility model discloses an SCR (Selective Catalytic Reduction) after-treatment nozzle for improving the conversion rate of nitric oxide. The SCR after-treatment nozzle is connected with an adblue tube and comprises a spray tube and a nozzle arranged at the tail end of the spray tube, wherein a spray hole, a mixing cavity and a spiral hole that are communicated with one another are arranged in sequence from the outlet end of the nozzle to the end of the nozzle, wherein the end of the nozzle is connected with the spray tube; the spray hole is the round hole that is coaxial with the tail end of the spray tube; the mixing cavity is a chamber; the spiral hole is in a spiral shape; and the upstream of the spiral hole is communicated with the tail end of the spray tube, and the downstream of the spiral hole is communicated with the mixing cavity. In the SCR after-treatment nozzle, a swirling groove is arranged in the nozzle, and the atomization effect is enhanced by changing the flow direction of gas and adblue mixture, thereby greatly improving the conversion rate of NOx.
Description
Technical field
The utility model relates to the engine exhaust gas processing unit technical field, relates to a kind of SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen in particular.
Background technique
Modern diesel engine emission regulation demands increasingly stringent, SCR (SCR) post-processing technology are to satisfy the technical measures that state IV and above Abgasgesetz must adopt.The SCR after-treatment system is made up 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 influences NO
xWhether up to standard the 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 decision discharging important device.
The model utility content
The utility model provides a kind of SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen, is provided with the eddy flow groove in shower nozzle inside, strengthens atomizing effect through changing gas with the flow direction and the speed of adding blue mixture, thereby improves NO greatly
xTransformation efficiency.
The utility model is to adopt 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, comprise jet pipe and be located at the terminal shower nozzle of jet pipe, 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; The circular hole that this spray orifice is and the jet pipe end is coaxial, this mixing chamber is a chamber, this spiral hole is a spiral helicine hole; These spiral hole upper reaches are communicated with jet pipe is terminal, and downstream are communicated with mixing chamber.
As further specifying of such scheme:
Preferably, said shower nozzle comprises welding cover, nozzle cage and eddy flow cell body, and this welding cover is cylinder-like structure; This nozzle cage is a tubular block shape structure, and the closed end of this nozzle cage is provided with spray orifice, and this eddy flow cell body is a 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, makes spiral chute and nozzle cage inwall constitute spiral hole; Constitute 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 the spiral hole upper reaches and jet pipe end is communicated with.
Preferably, said 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 said spray orifice.
Preferably; Said jet pipe middle part is provided with heat-proof device, and this heat-proof device comprises collet, heat insulation cover plate and thermal insulation ceramics, and this collet is the awl tubular structure; This heat insulation cover plate is the cover plate shape structure that the middle part is provided with circular hole; The small end of this collet is socketed on the jet pipe, and big 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 said jet pipe at right angles.
Preferably, said heat insulation cover plate is provided with the identity device of the terminal overbending direction of indication jet pipe.
Preferably, said identity device is the locating stud that is connected on the collet.
Preferably, said 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, said welding manner is soldering.
The beneficial effect that the utility model adopts above technological scheme to reach is:
1. the described SCR post-process nozzle of the utility model 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. the described SCR post-process nozzle of the utility model is provided with heat-proof device on jet pipe; Also can carry out installation and maintenance even Jet Pipe Temperature is higher; And on heat-proof device, be provided with the locating stud that mark is used, influence transformation efficiency to prevent the anti-flow direction of upsetting of shower nozzle direction dress.
3. the described SCR post-process nozzle of the utility model is provided with connecting sleeve at the jet pipe starting point, is used for pegging graft with blue tube, and overexertion damages parts in the time of can not only preventing nozzle is installed, and can also strengthen the sealability of joint.
Description of drawings
Fig. 1 is the structural representation of the described SCR post-process nozzle of the utility model;
Fig. 2 is the plan view of the described SCR post-process nozzle of the utility model;
Fig. 3 is the plan view of the described SCR post-process nozzle of the utility model;
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 the comparative trial column diagram under 40000L/h, 250 ℃ of conditions of temperature in air speed;
Fig. 7 is to be the 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 the 26S Proteasome Structure and Function of the utility model, below in conjunction with accompanying drawing and preferred embodiment the utility model is elaborated, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.
Fig. 1 is the structural representation of the described SCR post-process nozzle of the utility model; Shown in figure; This nozzle is plugged on the blue tube 4, includes the rectangular jet pipe of bending 2, soldering at jet pipe 2 terminal shower nozzle 1, the heat-proof device 3 of soldering on another side jet pipe 2.
Fig. 2 and Fig. 3 are respectively the plan view and the plan views of the described SCR post-process nozzle of the utility model; Shown in figure, this heat-proof device 3 comprises collet 5, heat insulation cover plate 6 and thermal insulation ceramics 9, and this collet 5 is the awl tubular structure; This heat insulation cover plate 6 is provided with the cover plate shape structure of circular hole for the middle part; The small end of this collet 5 is enclosed within on the jet pipe 2 and soldering connects, and big end cooperates with heat insulation cover plate 6 on being enclosed within jet pipe 2, and this thermal insulation ceramics 9 is filled in the collet 5; On the outer rim of heat insulation cover plate 6, be connected with a locating stud 7 that is used to indicate jet pipe 2 terminal overbending directions, influence transformation efficiency to prevent the anti-flow direction of upsetting of shower nozzle 1 direction dress.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 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, and the sectional view of shower nozzle 1 just is shown in figure; This shower nozzle 1 comprises welding cover 16, nozzle cage 14 and eddy flow cell body 15, and this welding cover 16 is a cylinder-like structure, and 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, and this eddy flow cell body 15 is a cylindrical structure, is provided with spiral chute at this cylindrical outer surface; This spiral fluted groove width is 3mm, and groove depth is 1mm, and lead angle is 35 °; This eddy flow cell body 15 cooperates with the opening stomidium post of nozzle cage 14; Make spiral chute and nozzle cage 14 inwalls constitute spiral hole 13, constitute 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; The other end is connected with the outer surface soldering of nozzle cage 14 opening ends, makes spiral hole 13 upper reaches and 2 terminal connections of jet pipe.
The described SCR post-process nozzle of the utility model has low temperature conversion efficient height, good reliability, is easy to advantages such as installation; Fig. 6 and Fig. 7 are respectively said nozzle of the utility model 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, and shown in figure, 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 the described nozzle transformation efficiency of the utility model is 47.7%; The experimental condition of Fig. 7 is that catalyst temperature is 350 ℃; Adding blue air speed is 40000L/h, and shown in figure, 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 the described nozzle transformation efficiency of the utility model is 84.4%.Can know that by these two charts the described SCR post-process nozzle of the utility model is no matter be that transformation efficiency all is higher than existing nozzle at 250 ℃ low temperature or under 350 ℃ high temperature condition.
Be merely one of the utility model preferred embodiment shown in the utility model the foregoing description and the accompanying drawing; Can not limit to the utility model with this; Under the condition that does not break away from the utility model marrow, any change that those skilled in the art did all belongs to the protection domain of the utility model.
Claims (10)
1. a SCR post-process nozzle that improves transformation efficiency of the oxides of nitrogen is connected on the blue tube, comprises jet pipe and is located at the terminal shower nozzle of jet pipe; It is characterized in that to being provided with spray orifice, mixing chamber and the spiral hole that is interconnected successively 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 these spiral hole upper reaches are communicated with jet pipe is terminal, and downstream are communicated with mixing chamber.
2. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 1 is characterized in that, said shower nozzle comprises welding cover, nozzle cage and eddy flow cell body; This welding cover is cylinder-like structure; This nozzle cage is a tubular block shape structure, and the closed end of this nozzle cage is provided with spray orifice, and this eddy flow cell body is a 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, and this spiral chute and nozzle cage inwall constitute spiral hole, constitutes 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, said 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 said spray orifice.
5. the SCR post-process nozzle of raising transformation efficiency of the oxides of nitrogen according to claim 1 and 2 is characterized in that, said 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 awl tubular structure, and this heat insulation cover plate is the cover plate shape structure that the middle part is provided with circular hole, and the small end of this collet is socketed on the jet pipe; Big 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 said 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, said 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, said 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, said 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 the SCR post-process nozzle of claim 2 or 9 described raising transformation efficiency of the oxides of nitrogen, it is characterized in that said welding manner is soldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202836734U CN202202935U (en) | 2011-08-05 | 2011-08-05 | SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202836734U CN202202935U (en) | 2011-08-05 | 2011-08-05 | SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202202935U true CN202202935U (en) | 2012-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202836734U Expired - Fee Related CN202202935U (en) | 2011-08-05 | 2011-08-05 | SCR (Selective Catalytic Reduction) after-treatment nozzle for improving conversion rate of nitric oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202202935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913310A (en) * | 2011-08-05 | 2013-02-06 | 广西玉柴机器股份有限公司 | SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) |
-
2011
- 2011-08-05 CN CN2011202836734U patent/CN202202935U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913310A (en) * | 2011-08-05 | 2013-02-06 | 广西玉柴机器股份有限公司 | SCR (selective catalytic reduction) post-processing nozzle for increasing conversion rate of NOx (nitrogen oxides) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20200805 |
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| CF01 | Termination of patent right due to non-payment of annual fee |