CN102278179A - SCR (Semiconductor Control Rectifier) atomizer of diesel engine for air assisted mode - Google Patents
SCR (Semiconductor Control Rectifier) atomizer of diesel engine for air assisted mode Download PDFInfo
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- CN102278179A CN102278179A CN 201110251790 CN201110251790A CN102278179A CN 102278179 A CN102278179 A CN 102278179A CN 201110251790 CN201110251790 CN 201110251790 CN 201110251790 A CN201110251790 A CN 201110251790A CN 102278179 A CN102278179 A CN 102278179A
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Abstract
The invention discloses an SCR (Semiconductor Control Rectifier) atomizer of a diesel engine for an air assisted mode, belonging to the technical field of atomizing devices of the diesel engines. The SCR atomizer comprises a hollow pipeline, wherein a pipe joint connected with an external device is connected and arranged at the top end of the pipeline; a spray head provided with a spray hole is connected and arranged at the tail end of the pipeline; and a heat insulating casing for insulating heat is sleeved on a pipe body of the pipeline. The SCR atomizer of the diesel engine for the air assisted mode has a simple structure and reasonable design; a structure of an electromagnetic spray nozzle in the atomizer in the prior art is changed; and by combining a simple mechanical structure to realize high-efficiency atomization of a urea water solution, the conversion efficiency of NOx is increased. Compared with the traditional electromagnetic spray nozzle, the invention can ensure that the cost is reduced by 50 percent, the conversion efficiency of NOx is increased by over 10 percent and has high temperature resistance and high reliability.
Description
Technical field
The invention belongs to diesel engine atomising device technical field, be specifically related to a kind of diesel SCR atomizer that is used for the air supplementary mode.
Background technique
The SCR technology is to have become large diesel engine to satisfy state four emission standards reduction NO at present
xA kind of mainstream technology of discharging.The diesel SCR technology is to utilize aqueous solution of urea to be mapped in the diesel exhaust gas as injection of reducing agent, and under the effect of exhaust gas temperature and air-flow, urea discharges ammonia (NH through pyrolysis and hydrolysis reaction
3), and under uniform temperature and catalyst action, with NO
xBe reduced to nitrogen (N
2) and water (H
2O), reduce NO to reach
xThe purpose of discharging.
For aqueous solution of urea is sprayed in the diesel exhaust gas, often adopt the direct injection method, soon urea electromagnetism nozzle is directly installed on the outlet pipe and sprays, because the electromagnetism nozzle belongs to electronic unit, the too high meeting of engine exhaust temperature causes the damage of urea electromagnetism nozzle, must cool off urea electromagnetism nozzle.Adopt the aqueous solution of urea atomizing effect of this mode not ideal enough in addition at present, influenced NO
xTransformation efficiency.
Be to improve the atomizing effect of aqueous solution of urea, present trend is after the air mixing with aqueous solution of urea and high pressure, to spray in the diesel exhaust gas through mechanical atomizer again.The structure of atomizer becomes one of principal element that influences the aqueous solution of urea atomizing effect when adopting this mode.
Summary of the invention
At the problem that prior art exists, the objective of the invention is to design provides a kind of technological scheme that is used for the diesel SCR atomizer of air supplementary mode, and this diesel SCR atomizer structure is simple, and cost of production is low and improved NO
xTransformation efficiency.
Described a kind of diesel SCR atomizer that is used for the air supplementary mode, it is characterized in that comprising the pipeline of hollow, described pipeline top connects and to be provided for the pipe joint that is connected with external means, the pipeline tail end connects the shower nozzle that is provided with spray orifice, and socket is provided for heat insulation heat-insulating housing on the pipe shaft of pipeline.
Described a kind of diesel SCR atomizer that is used for the air supplementary mode is characterized in that described heat-insulating housing is a funnel structure, fixedlys connected with pipeline outer wall in the heat-insulating housing lower end, and its upper end constitutes heat insulation cavity by the contiguous block sealing that is provided with.
Described a kind of diesel SCR atomizer that is used for the air supplementary mode is characterized in that fixedly installing on the described heat-insulating housing locating stud that is used to locate spray orifice.
Described a kind of diesel SCR atomizer that is used for the air supplementary mode is characterized in that on the side of described shower nozzle one group of spray orifice being set.
Described a kind of diesel SCR atomizer that is used for the air supplementary mode, the diameter that it is characterized in that described spray orifice is 0.3～0.7mm.
Above-mentioned a kind of diesel SCR atomizer that is used for the air supplementary mode, simple in structure, reasonable in design, electromagnetism structure of nozzle in the atomizer in conjunction with the high-efficient atomizing of realizing aqueous solution of urea, promotes NO by simple mechanical structure in the change prior art
xTransformation efficiency.Compare with existing electromagnetism nozzle, cost of the present invention reduces more than 50%, NO
xTransformation efficiency improve more than 10%, high temperature resistant, the reliability height.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a structure sectional view of the present invention.
Among the figure: the 1-pipe joint; The 2-pipeline; The 3-contiguous block; The 4-locating stud; The 5-heat-insulating housing; The heat insulation cavity of 501-; The 6-shower nozzle; The 601-spray orifice.
Embodiment
Further specify the present invention below in conjunction with Figure of description.
As shown in the figure, a kind of diesel SCR atomizer that is used for the air supplementary mode comprises the pipeline 2 of hollow, the fixedly connected pipe joint 1 in the top of pipeline 2, and pipe joint 1 meets SAE J2044-2002 standard, can adopt rapid pipe joint to connect fast with it, be convenient to atomizer and be connected with external means.The fixedly connected shower nozzle 6 of the tail end of pipeline 2.One group of spray orifice 601 is set on the side of shower nozzle 6, and the diameter of spray orifice 601 is 0.3～0.7mm, for reaching atomizing effect and promoting NO
xThe most preferred mode of transformation efficiency 3 spray orifices 601 are set on the side of shower nozzle 6, the diameter of spray orifice 601 is 0.5mm.
Socket is provided for heat insulation heat-insulating housing 5 on the pipe shaft of pipeline 2, and heat-insulating housing 5 is the up big and down small funnel structure of funnel structure.Fixedly connected with pipeline 2 outer walls in heat-insulating housing 5 lower ends, its upper end constitutes heat insulation cavity 501 by contiguous block 3 sealings that are provided with.The setting of heat-insulating housing 5 prevents that the high temperature pair plastic device that is connected with atomizer of diesel exhaust gas from causing adverse effect.
And fixedly install locating stud 4 in the upper end of heat-insulating housing 5, locating stud 4 is in same straight line with spray orifice 601.Locating stud 4 mainly is used to locate spray orifice 601, guarantee that this atomizer installs after, the injection direction of spray orifice 601 is consistent with the diesel exhaust gas airflow direction, helps the diffusion of aqueous solution of urea.
After the air mixing of aqueous solution of urea and high pressure, spray in the diesel engine vent gas, realize NO through pipe joint 1, pipeline 2 and shower nozzle 6
xConversion.
The whole parts of atomizer all adopt the heat-resistance stainless steel of anti-urea corrosion among the present invention, and the Placement between the parts adopts vacuum brazing, prevent that weld seam from causing adverse effect to flowing.This atomizer is a full mechanical simultaneously, need not cooling without any electronic unit, high temperature resistant reliability height.
Claims (5)
1. diesel SCR atomizer that is used for the air supplementary mode, it is characterized in that comprising the pipeline (2) of hollow, described pipeline (2) top connects and to be provided for the pipe joint (1) that is connected with external means, pipeline (2) tail end connects the shower nozzle (6) that is provided with spray orifice (601), and socket is provided for heat insulation heat-insulating housing (5) on the pipe shaft of pipeline (2).
2. a kind of diesel SCR atomizer that is used for the air supplementary mode as claimed in claim 1, it is characterized in that described heat-insulating housing (5) is a funnel structure, fixedly connected with pipeline (2) outer wall in heat-insulating housing (5) lower end, its upper end constitutes heat insulation cavity (501) by contiguous block (3) sealing that is provided with.
3. a kind of diesel SCR atomizer that is used for the air supplementary mode as claimed in claim 1 is characterized in that fixedly installing on the described heat-insulating housing (5) locating stud (4) that is used to locate spray orifice (601).
4. a kind of diesel SCR atomizer that is used for the air supplementary mode as claimed in claim 1 is characterized in that on the side of described shower nozzle (6) one group of spray orifice (601) being set.
5. a kind of diesel SCR atomizer that is used for the air supplementary mode as claimed in claim 4, the diameter that it is characterized in that described spray orifice (601) is 0.3～0.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110251790 CN102278179A (en) | 2011-08-30 | 2011-08-30 | SCR (Semiconductor Control Rectifier) atomizer of diesel engine for air assisted mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110251790 CN102278179A (en) | 2011-08-30 | 2011-08-30 | SCR (Semiconductor Control Rectifier) atomizer of diesel engine for air assisted mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102278179A true CN102278179A (en) | 2011-12-14 |
Family
ID=45103855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110251790 Pending CN102278179A (en) | 2011-08-30 | 2011-08-30 | SCR (Semiconductor Control Rectifier) atomizer of diesel engine for air assisted mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102278179A (en) |
Cited By (2)
| 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 |
| CN102748106A (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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603453A (en) * | 1994-12-30 | 1997-02-18 | Lab S.A. | Dual fluid spray nozzle |
| US6382600B1 (en) * | 1998-12-01 | 2002-05-07 | Robert Bosch Gmbh | Device for introducing a reducing agent into an exhaust pipe segment of an internal combustion engine |
| CN101371969A (en) * | 2008-10-09 | 2009-02-25 | 江苏中科节能环保技术有限公司 | Reducing reagent nozzle for denitration by SNCR method |
| CN101696648A (en) * | 2009-09-27 | 2010-04-21 | 无锡市凯龙汽车设备制造有限公司 | Nozzle for selective catalytic conversion system of diesel engine |
-
2011
- 2011-08-30 CN CN 201110251790 patent/CN102278179A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603453A (en) * | 1994-12-30 | 1997-02-18 | Lab S.A. | Dual fluid spray nozzle |
| US6382600B1 (en) * | 1998-12-01 | 2002-05-07 | Robert Bosch Gmbh | Device for introducing a reducing agent into an exhaust pipe segment of an internal combustion engine |
| CN101371969A (en) * | 2008-10-09 | 2009-02-25 | 江苏中科节能环保技术有限公司 | Reducing reagent nozzle for denitration by SNCR method |
| CN101696648A (en) * | 2009-09-27 | 2010-04-21 | 无锡市凯龙汽车设备制造有限公司 | Nozzle for selective catalytic conversion system of diesel engine |
Cited By (2)
| 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 |
| CN102748106A (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 |
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Application publication date: 20111214 |