CN102852604A - Urea injection device for tail gas denitration selective catalytic reduction (SCR) system of marine high-power diesel engine - Google Patents
Urea injection device for tail gas denitration selective catalytic reduction (SCR) system of marine high-power diesel engine Download PDFInfo
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- CN102852604A CN102852604A CN2012103786303A CN201210378630A CN102852604A CN 102852604 A CN102852604 A CN 102852604A CN 2012103786303 A CN2012103786303 A CN 2012103786303A CN 201210378630 A CN201210378630 A CN 201210378630A CN 102852604 A CN102852604 A CN 102852604A
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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 invention relates to a urea injection device for a tail gas denitration selective catalytic reduction (SCR) system of a marine high-power diesel engine. The urea injection device comprises a first nozzle holder, a second nozzle holder, a third nozzle holder, a fourth nozzle holder, nozzles and an air intake injection pipe section, wherein four holes are formed in the air intake injection pipe section; the first nozzle holder, the second nozzle holder, the third nozzle holder and the fourth nozzle holder are correspondingly welded with the four holes in the air intake injection pipe section, and the four nozzles are respectively connected with the first nozzle holder, the second nozzle holder, the third nozzle holder and the fourth nozzle holder through bolts to forms a first nozzle device, a second nozzle device, a third nozzle device and a fourth nozzle device. The urea injection device can be well applicable to the tail gas denitration SCR system of the marine high-power diesel engine, urea which is injected by the device has high dispersity and is uniformly mixed; and the inner parts of an exhaust pipe are not arranged, so that the device is slightly influenced, is simple in structure and is convenient to install and maintain.
Description
Technical field
The present invention relates to a kind of SCR system urea-spray device, be used for specifically Marine High-power Diesel Engine tail gas denitration SCR system and spray urea.
Background technique
At present, conventional diesel engine is because the tail gas discharge capacity is little, and needed exhaust caliber is less, and what be applied to therefore that the urea-spray of ordinary diesel oil tail gas denitration SCR system generally adopts is that the single nozzle central shaft sprays to porous.But this conventional urea-spray application of installation is when Marine High-power Diesel Engine tail gas SCR system, urea can occur mixes inhomogeneous with tail gas, spray (the tail gas pipeline diameter is excessive, and the tail gas of pressing close to tube wall contacts with urea not) not in place, one-jet emitted dose control accuracy is not high yet; Simultaneously because high-power diesel engine exhaust caliber is large, want nozzle is arranged on the central axis of pipeline, the urea-spray pipe that a length must be arranged is the pipeline radius places in the air inlet pipeline, the impact that long injection pipe is vulnerable to tail gas stream and vibration produces unpredictable amount of deflection, thereby cause actual ejection angle and the predefined value of nozzle deviation to occur, cause mixing inhomogeneous, cause urea waste and transformation efficiency low.Conventional injection apparatus can not satisfy Marine High-power Diesel Engine tail gas denitration SCR system.
Summary of the invention
Purpose of the present invention is in order to overcome conventional urea-spray application of installation in the deficiency of Marine High-power Diesel Engine tail gas denitration SCR system, a kind of Marine High-power Diesel Engine tail gas denitration SCR system urea-spray device is provided, and this injection apparatus can be applicable to the injection of urea in the diesel engine vent gas denitration SCR system under the Marine High-power Diesel Engine exhaust caliber Large Diameter Pipeline environment.
According to technological scheme provided by the invention, Marine High-power Diesel Engine tail gas denitration SCR system urea-spray device comprises the first nozzle carrier, the second nozzle seat, the 3rd nozzle carrier, the 4th nozzle carrier, nozzle, pipeline section is sprayed in air inlet, described air inlet is sprayed on the pipeline section and is offered four holes, the first nozzle carrier, the second nozzle seat, the 3rd nozzle carrier, the corresponding welding in four holes on the pipeline section is sprayed in the 4th nozzle carrier and air inlet, described four nozzles respectively with the first nozzle carrier, the second nozzle seat, the 3rd nozzle carrier, the 4th nozzle carrier connects into first with bolt, second, the 3rd, the 4th spray nozzle device.
As a further improvement on the present invention, four spray-holes of described first, second, third, fourth spray nozzle device are positioned at same cross section, and are symmetrical along central shaft, and injection direction is radial spray, and the urea that each spray site ejects can interact;
As a further improvement on the present invention, near second nozzle seat 2 and the angle between the 3rd nozzle carrier the described medial axis is 60 °; Angle between second nozzle seat and the first nozzle carrier is 30 °; Angle between the 3rd nozzle carrier and the 4th nozzle carrier is 30 °.
Compared with the prior art the present invention has the following advantages:
The design of multi-point injection of the present invention can be used the small aperture nozzle under the larger condition of urea injecting quantity, dwindling of the increase of nozzle quantity and aperture can improve the dispersion degree that sprays urea; The length of gas exhaust piping jet segment has been lowered in the design in each same cross section of spray site, and simultaneously the urea that sprays of each spray site can the Interaction enhanced disturbance, promotes mixing of urea and tail gas; The radial spray mode takes full advantage of the large characteristic of exhaust caliber, can not be attached to exhaust wall so that spray urea, and radial spray has been saved the impact that injection line in the gas exhaust piping has lowered exhaust gas flow and vibration simultaneously.In sum, be compared to the conventional nozzle design, the present invention can better be practically applicable to Marine High-power Diesel Engine tail gas denitration SCR system, and it sprays urea dispersion degree height, mixes; The exhaust-pipe-free inner piece, influenced little, simple in structure being convenient to installed and overhauled.
Description of drawings
Fig. 1 is jet blower layout structure schematic representation of the present invention.
Fig. 2 is injection apparatus decomposing schematic representation of the present invention.
Embodiment
Following the present invention is further described in connection with the embodiment in the accompanying drawing:
As shown in Figure 1, comprise the first nozzle carrier 1, second nozzle seat 2, the 3rd nozzle carrier 3, the 4th nozzle carrier 4, nozzle 5, air inlet injection pipeline section 6, described air inlet is sprayed on the pipeline section 6 and is offered four holes, the corresponding welding in four holes on the pipeline section 6 is sprayed in the first nozzle carrier 1, second nozzle seat 2, the 3rd nozzle carrier 3, the 4th nozzle carrier 4 and air inlet, and described four nozzles 5 connect into first, second, third, fourth spray nozzle device with the first nozzle carrier 1, second nozzle seat 2, the 3rd nozzle carrier 3, the 4th nozzle carrier 4 usefulness bolts respectively.
Four spray-holes of described first, second, third, fourth spray nozzle device are positioned at same cross section, and are symmetrical along central shaft, and injection direction is radial spray, and the urea that each spray site ejects can interact.
Near the described medial axis second nozzle seat 2 and the angle between the 3rd nozzle carrier 3 are 60 °; Angle between second nozzle seat 2 and the first nozzle carrier 1 is 30 °; Angle between the 3rd nozzle carrier 3 and the 4th nozzle carrier 4 is 30 °.
Working principle of the present invention and working procedure:
Direct and air inlet injection pipe 6 welding of four nozzle carriers of urea-spray device of the present invention, reliable and stable; Nozzle 5 is connected and the exhaust-pipe-free inner piece with four direct bolts of nozzle carrier, and installation and repairing is simple and convenient, and need not adjust spray angle; Urea is sprayed by the nozzle of four spray nozzle devices simultaneously, each nozzle ejection aperture is little, dispersion degree is high, spray site with sectional axis the symmetrical so that mutual interference effect of urea that the spray-hole of the urea and the 3rd that first, second spray nozzle device spray-hole ejects, the 4th spray nozzle device ejects so that urea mixes more even with flue gas.Described spray nozzle device, each nozzle have independently dosage control unit and kinetic pump, and its dosage control unit has the unified control of central control system.
The present invention can effective application in Marine High-power Diesel Engine tail gas denitration SCR system, improve spray that urea disperses and with the mixing of flue gas, be conducive to the transformation efficiency of NOx, and the installation and repairing between sailing date that is easy to be expert at simple in structure.
Claims (5)
1. Marine High-power Diesel Engine tail gas denitration SCR system urea-spray device, it is characterized in that: comprise the first nozzle carrier (1), second nozzle seat (2), the 3rd nozzle carrier (3), the 4th nozzle carrier (4), nozzle (5), pipeline section (6) is sprayed in air inlet, described air inlet is sprayed on the pipeline section (6) and is offered four holes, the first nozzle carrier (1), second nozzle seat (2), the 3rd nozzle carrier (3), the corresponding welding in four holes on the pipeline section (6) is sprayed in the 4th nozzle carrier (4) and air inlet, described four nozzles (5) respectively with the first nozzle carrier (1), second nozzle seat (2), the 3rd nozzle carrier (3), the 4th nozzle carrier (4) connects into first with bolt, second, the 3rd, the 4th spray nozzle device.
2. Marine High-power Diesel Engine tail gas denitration SCR as claimed in claim 1 system urea-spray device, it is characterized in that: four spray-holes of described first, second, third, fourth spray nozzle device are positioned at same cross section, symmetrical along central shaft, injection direction is radial spray.
3. Marine High-power Diesel Engine tail gas denitration SCR as claimed in claim 1 system urea-spray device, it is characterized in that: the angle between described second nozzle seat (2) and the 3rd nozzle carrier (3) is 60 °.
4. Marine High-power Diesel Engine tail gas denitration SCR as claimed in claim 1 system urea-spray device, it is characterized in that: the angle between second nozzle seat (2) and the first nozzle carrier (1) is 30 °.
5. Marine High-power Diesel Engine tail gas denitration SCR as claimed in claim 1 system urea-spray device, it is characterized in that: the angle between the 3rd nozzle carrier (3) and the 4th nozzle carrier (4) is 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103786303A CN102852604A (en) | 2012-09-29 | 2012-09-29 | Urea injection device for tail gas denitration selective catalytic reduction (SCR) system of marine high-power diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103786303A CN102852604A (en) | 2012-09-29 | 2012-09-29 | Urea injection device for tail gas denitration selective catalytic reduction (SCR) system of marine high-power diesel engine |
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| CN102852604A true CN102852604A (en) | 2013-01-02 |
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| CN2012103786303A Pending CN102852604A (en) | 2012-09-29 | 2012-09-29 | Urea injection device for tail gas denitration selective catalytic reduction (SCR) system of marine high-power diesel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161548A (en) * | 2011-12-08 | 2013-06-19 | 曼柴油机和涡轮公司,德国曼柴油机和涡轮欧洲股份公司的联营公司 | A large turbocharged two-stroke diesel engine with exhaust gas purification |
| US9387438B2 (en) | 2014-02-14 | 2016-07-12 | Tenneco Automotive Operating Company Inc. | Modular system for reduction of sulphur oxides in exhaust |
| CN107376644A (en) * | 2017-06-14 | 2017-11-24 | 北京福田戴姆勒汽车有限公司 | The urea mixed-flow structure of exhaust treatment system |
| CN114941562A (en) * | 2022-05-24 | 2022-08-26 | 上海交通大学 | Ammonia jet mixer for diesel-ammonia dual-fuel engine DeNOx and injection method |
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| CN102257253A (en) * | 2008-12-17 | 2011-11-23 | 排放技术有限公司 | Method and device for the addition in drop form of a liquid reduction agent to an exhaust gas line |
| CN202811020U (en) * | 2012-09-29 | 2013-03-20 | 江苏绿源环保科技有限公司 | Urea jetting device of high-power diesel engine tail gas denitration selective catalytic reduction (SCR) system for ship |
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| CN101245726A (en) * | 2007-02-12 | 2008-08-20 | 潍柴动力股份有限公司 | SCR reprocessing piping device of large-duty engine |
| EP2189633A1 (en) * | 2008-11-22 | 2010-05-26 | Grundfos Management A/S | Device to discharge urine solution in a waste gas line |
| CN102257253A (en) * | 2008-12-17 | 2011-11-23 | 排放技术有限公司 | Method and device for the addition in drop form of a liquid reduction agent to an exhaust gas line |
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| CN202811020U (en) * | 2012-09-29 | 2013-03-20 | 江苏绿源环保科技有限公司 | Urea jetting device of high-power diesel engine tail gas denitration selective catalytic reduction (SCR) system for ship |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161548A (en) * | 2011-12-08 | 2013-06-19 | 曼柴油机和涡轮公司,德国曼柴油机和涡轮欧洲股份公司的联营公司 | A large turbocharged two-stroke diesel engine with exhaust gas purification |
| CN103161548B (en) * | 2011-12-08 | 2015-06-10 | 曼柴油机和涡轮公司,德国曼柴油机和涡轮欧洲股份公司的联营公司 | A large turbocharged two-stroke diesel engine and method for introducing reducer to exhaust gas flow |
| US9387438B2 (en) | 2014-02-14 | 2016-07-12 | Tenneco Automotive Operating Company Inc. | Modular system for reduction of sulphur oxides in exhaust |
| CN107376644A (en) * | 2017-06-14 | 2017-11-24 | 北京福田戴姆勒汽车有限公司 | The urea mixed-flow structure of exhaust treatment system |
| CN107376644B (en) * | 2017-06-14 | 2020-07-28 | 北京福田戴姆勒汽车有限公司 | Urea mixed flow structure of tail gas treatment system |
| CN114941562A (en) * | 2022-05-24 | 2022-08-26 | 上海交通大学 | Ammonia jet mixer for diesel-ammonia dual-fuel engine DeNOx and injection method |
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Owner name: TENNECO (CHINA) CO., LTD. Free format text: FORMER OWNER: JIANGSU LVYUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Effective date: 20140410 |
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Free format text: CORRECT: ADDRESS; FROM: 214142 WUXI, JIANGSU PROVINCE TO: 200001 HUANGPU, SHANGHAI |
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Effective date of registration: 20140410 Address after: A C-D 17 Jiujiang road Whampoa District Shanghai City, No. 686 building, Baolong 200001 Applicant after: Tenneco (Chinese) Co. Ltd. Address before: 214142 Jiangsu province Wuxi New Area Shuofang Industrial Park Road two Zhenfa Applicant before: Jiangsu Lvyuan Environmental Protection Technology Co.,Ltd. |
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Application publication date: 20130102 |