CN201871432U - Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system - Google Patents
Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system Download PDFInfo
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- CN201871432U CN201871432U CN2010205395813U CN201020539581U CN201871432U CN 201871432 U CN201871432 U CN 201871432U CN 2010205395813 U CN2010205395813 U CN 2010205395813U CN 201020539581 U CN201020539581 U CN 201020539581U CN 201871432 U CN201871432 U CN 201871432U
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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
- 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
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Abstract
The utility model relates to an atomizing spray nozzle structure used for spraying liquid reducing agents in an SCR (selective catalytic reduction) system. The atomizing spray nozzle structure is used for spraying the reducing agents into a gas exhaust pipe, and belongs to the technical field of post-treatment of tail gas. The atomizing spray nozzle comprises an AdBlue pipe, a spray head and a spray orifice, wherein, the spray head is arranged at the end part of the AdBlue pipe; the spray orifice is arranged on the spray head; the AdBlue pipe forms a bent part; the axis where the spray orifice is located and the axis where the spray head is located form an acute-angled inclined angle; and the inclination direction of the spray orifice is opposite to the gas exhaust movement direction. The atomizing spray nozzle structure has the advantages that the design is ingenious, the reducing agents have low probability of crystallizing and has a good mixing effect with waste gas of an engine after being atomized, and the purification rate is high; and the atomizing spray nozzle structure belongs to the field of energy conservation and exhaust reduction.
Description
Technical field
The utility model relates to a kind of exhaust gas from diesel vehicle post-processing purifying system, relates in particular to be used for the atomizing nozzle structure that liquid reducer sprays in a kind of SCR system.
Background technology
Existing known, by the nitrogen oxide in SCR technology (SCR) the minimizing internal combustion engine especially diesel engine vent gas is a kind of general technology path, be about to reducing agent (aqueous solution of urea) through atomizing metered injection intake and exhaust pipeline, and by the SCR catalyst the main pernicious gas NOx in the waste gas is changed into the nitrogen G﹠W and discharge, reach the purpose of tail gas clean-up.
The injection of reducing agent all is to be ejected in the blast pipe by atomizer, the structure of atomizer is different in the prior art, wherein Chinese patent CN201526357U discloses a kind of nozzle for selective catalytic conversion system of diesel engine, this nozzle comprises blue tube, shower nozzle, parts such as spray orifice and insulator, it is simple in structure, certain effect is arranged at aspects such as avoiding crystallization, but this structure has the defective of itself, be vertical setting such as the axis of spray orifice and the axis of shower nozzle, because near the air velocity the blast pipe internal face is slower with respect to the air velocity of center, and spray orifice vertically is provided with the distance that has obviously reduced reducing agent arrival wall, bigger at injection of reducing agent injection pressure near internal face, reducing agent easily is injected into nozzle and installs near the internal face, be unfavorable for the diffusion and the atomizing of reducing agent on the one hand, also can form the waste of crystalline polamer and reducing agent on the other hand.
And for example: CN101048580 also discloses a kind of liquid reducer injection structure, the spray orifice direction of wherein having described a kind of nozzle tip portion with form along the structure of the peripheral orientation polarization of nozzle tip portion, but because its angle of eccentricity air motion direction forward, although reducing agent can be mixed in the waste gas stream, but because forward air-flow setting of spray orifice, reducing agent after the injection is easy to concentrate on the center of blast pipe, and mixed effect is not good, influences purification efficiency.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, provides to be used for the atomizing nozzle structure that liquid reducer sprays in a kind of SCR system, and the utility model design is ingenious, be difficult for crystallization, atomizing effect is good, the purifying rate height.
To achieve these goals, the utility model provides and has been used for the atomizing nozzle structure that liquid reducer sprays in a kind of SCR system, be used for injection of reducing agent is mapped to blast pipe, described atomizer comprises blue tube, shower nozzle and spray orifice, described shower nozzle is arranged on the end of described blue tube, described spray orifice is arranged on the described shower nozzle, described blue tube forms bending part, the axis at the axis at described spray orifice place and described shower nozzle place forms the inclined at acute angles angle, and the incline direction of described spray orifice is contrary to the exhaust direction of motion.
Preferably, the axis at described spray orifice place and axis shape-80 ° of angles at 45 at described shower nozzle place.
More preferably, the axis at the axis at described spray orifice place and described shower nozzle place forms 70 ° of angles.
Preferably, described blue tube bending part is contrary suitable to the exhaust direction of motion to the exhaust direction of motion or described bending part.
Preferably, described atomizing nozzle structure also comprises insulator, collet and mount pad, and described insulator is installed in the outside, described blue tube middle part, and described collet is installed in the outside of described insulator, and described mount pad is installed in the outside portion of described collet.
More preferably, described insulator is the thermal insulation ceramics material.
The utility model spray orifice is contrary ingenious to the airflow direction design, not only is difficult for causing crystallization, and atomizing back and engine exhaust good mixing effect, purifying rate height.
Description of drawings:
Fig. 1 is the utility model preferred embodiment schematic diagram
Fig. 2 is shower nozzle 4 structural representations in the utility model
Fig. 3 is Fig. 1 partial enlarged drawing
Fig. 4 is the utility model embodiment two schematic diagrames
The specific embodiment:
In order more to be expressly understood technology contents of the present utility model, describe in detail especially exemplified by following examples.
As shown in Figure 1, the utility model relates to and is used for the atomizing nozzle structure that liquid reducer sprays in a kind of SCR system, described atomizer 1 is installed on the wall of blast pipe 2, described blast pipe is used for the circulation of waste gas stream, be provided with the reducing catalyst (not shown) in it, described atomizer 1 is mapped to injection of reducing agent in the blast pipe 2, and mixes the back with waste gas stream and purify reaction with reducing agent, the NOx concentration in the reduction combustion gas.
As depicted in figs. 1 and 2, described atomizer comprises blue tube 3, shower nozzle 4 and spray orifice 5, described blue tube 3 is a hollow tubular structures, carry liquid reducer (adding indigo plant) in it, the end that described blue tube 3 is positioned at blast pipe 2 forms crooked bending part 6, form a blind hole structure in the described shower nozzle 4, described shower nozzle 4 open ends are set in the outside that described blue tube 3 is positioned at blast pipe 2 one ends, and be welded on outside the described blue tube, described shower nozzle 4 forms some spray orifices 5 near an end of sealing, and described spray orifice is communicated with the passage in blue tube 3 and the described blast pipe 2.
In the utility model, described spray orifice 5 is disposed in an evenly spaced relation on the wall circumferencial direction of shower nozzle 4, and 3-8 spray orifice can evenly be set at interval, and its aperture is good at 0.3-0.8mm; The axis at described spray orifice 5 places and the axis at described shower nozzle 4 places form inclined at acute angles angle β, incline direction is contrary to the exhaust direction of motion, inclination angle beta is preferable between 45 °-80 °, like this, can form the active force of opposing waste gas motion through the moment that spray orifice 5 ejects when reducing agent, with waste gas reverse flow process in, reducing agent is fully atomized, simultaneously because the effect that blows of waste gas stream, the final stream with waste gas of reducing agent is brought to blast pipe 2 downstreams after fully mixing, and carries out catalytic reduction reaction with wherein catalyst.Simultaneously, reducing agent with certain angle ejection, has prolonged range of jet with respect to waste gas stream, is not easy to be ejected into to cause crystallization on the tube wall, and in addition, bigger with the contact area of waste gas stream, mixed effect is better.
In this preferred embodiment, it be good that described bending part 6 forms 90 °, and wrap direction is contrary to the exhaust direction of motion, the axis at described spray orifice 5 places and 70 ° of angles of inclination of the axis at described shower nozzle 4 places formation, the spray orifice that 4 apertures are set is 0.5mm.
Preferably, described atomizer 1 also comprises insulator 7, collet 8 and mount pad 9, described insulator 7 and collet 8 tops are cylindrical structure, its underpart is a vertebral body structure, described insulator 7 is installed in the outside, described blue tube 3 middle parts, described collet 8 is installed in the outside of described insulator 7, described mount pad 9 is installed in the outside portion on described collet 8 tops, 7 heat-blocking actions of described insulator, the main thermal insulation ceramics material that adopts in the utility model, prevent reducing agent (the adding indigo plant) solution crystallization in the blue tube 3, described mount pad 9 is fixed on atomizer 1 on the wall of blast pipe 2 by welding; Further, as shown in Figure 3, the outer surface of described mount pad 9 is provided with screw thread, correspondingly, is arranged on mounting cap 10 inwalls in the mount pad outside and also is provided with screw thread, and mounting cap 10 is by the holder 9 that is threaded, and prevents that atomizer from going here and there up and down; Between mounting cap 10, insulator 7 and blue tube 3, be provided with end cap 11, end cap 11 plays the thermal-insulating sealing effect to insulator 7 on the one hand, by the alignment pin 12 on the cooperation of the locating hole on its sidewall mounting cap, prevent that atomizer from rotating, and plays fixation on the other hand.
Fig. 4 is the utility model embodiment two, with the wrap direction of preferred embodiment different is described bending part 6 along to the exhaust direction of motion, also can realize preferable mixed aerosol effect.
To sum up, the atomizing nozzle structure spray orifice that is used for the liquid reducer injection in the utility model SCR system is contrary ingenious to the airflow direction design, not only is difficult for causing crystallization, and atomizing back good mixing effect, the purifying rate height.
In this specification, the utility model only is described with reference to its certain embodiments, but, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model, as being provided with etc. of angle of bend, each spray orifice angle of inclination of changing bending part 6, therefore, the utility model specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (7)
1.SCR be used for the atomizing nozzle structure that liquid reducer sprays in the system, be used for injection of reducing agent is mapped to blast pipe, described atomizer comprises blue tube, shower nozzle and spray orifice, described shower nozzle is arranged on the end of described blue tube, described spray orifice is arranged on the described shower nozzle, described blue tube forms bending part, it is characterized in that: the axis at the axis at described spray orifice place and described shower nozzle place forms the inclined at acute angles angle, and the incline direction of described spray orifice is contrary to the exhaust direction of motion.
2. be used for the atomizing nozzle structure that liquid reducer sprays in the SCR according to claim 1 system, it is characterized in that: the axis shape at the axis at described spray orifice place and described shower nozzle place-80 ° of angles at 45.
3. be used for the atomizing nozzle structure that liquid reducer sprays in the SCR according to claim 2 system, it is characterized in that: 70 ° of angles of axis formation at the axis at described spray orifice place and described shower nozzle place.
4. according to being used for the atomizing nozzle structure that liquid reducer sprays in claim 1 or the 2 or 3 described SCR systems, it is characterized in that: described bending part is contrary to the exhaust direction of motion.
5. according to being used for the atomizing nozzle structure that liquid reducer sprays in claim 1 or the 2 or 3 described SCR systems, it is characterized in that: described bending part is along to the exhaust direction of motion.
6. according to being used for the atomizing nozzle structure that liquid reducer sprays in aforementioned claim 1 or the 2 or 3 described SCR systems, it is characterized in that: described atomizer also comprises insulator, collet and mount pad, described insulator is installed in the outside, described blue tube middle part, described collet is installed in the outside of described insulator, and described mount pad is installed in the outside portion of described collet.
7. be used for the atomizing nozzle structure that liquid reducer sprays in the SCR according to claim 6 system, it is characterized in that: described insulator is the thermal insulation ceramics material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205395813U CN201871432U (en) | 2010-09-25 | 2010-09-25 | Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205395813U CN201871432U (en) | 2010-09-25 | 2010-09-25 | Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system |
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| CN201871432U true CN201871432U (en) | 2011-06-22 |
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| CN2010205395813U Expired - Fee Related CN201871432U (en) | 2010-09-25 | 2010-09-25 | Atomizing spray nozzle structure used for spraying liquid reducing agents in SCR (selective catalytic reduction) system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748105A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| 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) |
| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| 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 |
| CN112096489A (en) * | 2019-06-18 | 2020-12-18 | 罗伯特·博世有限公司 | Exhaust gas system for exhaust gas aftertreatment |
-
2010
- 2010-09-25 CN CN2010205395813U patent/CN201871432U/en not_active Expired - Fee Related
Cited By (6)
| 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) |
| CN102748105A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| 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 |
| CN112096489A (en) * | 2019-06-18 | 2020-12-18 | 罗伯特·博世有限公司 | Exhaust gas system for exhaust gas aftertreatment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 215211, No. 666 Fen Lu, Fen Hu Town, Wujiang City, Jiangsu, Suzhou Patentee after: Suzhou PowerGreen Emission Solution System Co., Ltd. Address before: 215211 Wujiang City, Jiangsu province FENHU Economic Development Zone, the community Fen Road No. 666 Patentee before: Suzhou PowerGreen Emission Solution System Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20160925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |