CN201818352U - Exhaust pipe with function of mixing urea with exhausted smoke - Google Patents
Exhaust pipe with function of mixing urea with exhausted smoke Download PDFInfo
- Publication number
- CN201818352U CN201818352U CN2010205962005U CN201020596200U CN201818352U CN 201818352 U CN201818352 U CN 201818352U CN 2010205962005 U CN2010205962005 U CN 2010205962005U CN 201020596200 U CN201020596200 U CN 201020596200U CN 201818352 U CN201818352 U CN 201818352U
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- CN
- China
- Prior art keywords
- urea
- exhaust pipe
- smoke
- nozzle
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to an exhaust pipe with the function of mixing urea with exhausted smoke, which comprises an exhaust pipe body, wherein an elbow segment of the exhaust pipe body is provided with a nozzle supporting base which is equipped with a urea nozzle. The exhaust pipe has the advantages of meeting the jet requirement of a urea jet system and realizing the normal jet of urea and the sufficient mixing of the urea with exhausted pipe. The exhaust pipe can prevent urea from being directly jetted onto pipe wall to generate crystallized urea so as to corrode the urea nozzle and then the entire exhaust system. The exhaust pipe further achieves the counteraction of the impact of exhaust airflow on the jetted urea by means of angular deflection method, thereby mixing the urea with the exhausted smoke sufficiently.
Description
Technical field
The utility model relates to a kind of smoke-ejecting pipe with urea and smoke evacuation mixed function, belongs to diesel car smoke-ejecting pipe field.
Background technique
Require to implement state's IV emission standard according to GB17691-2005 in 2010.Realizing the Europe IV to NOx and the lower limit value of PM, is to pass through optimized combustion in the machine earlier, re-uses SCR (selection type catalytic reduction reaction Selective Catalytic Reduction) after-treatment system and reduces the NOx discharging that produces because of burning optimization;
The SCR system is meant and is installed in the diesel car vent systems, the NOx in the diesel exhaust gas is catalysed and reduced into N
2Catalytic convention design.The SCR system is conversion of nitrogen oxides N by reducing agent
2, generally be to select aqueous solution of urea as reducing agent.
Aqueous solution of urea is ejected in the outlet pipe of catalyzer countercurrent direction, is decomposed into CO in the exhaust gas temperature and the air-flow effect therapeutic method to keep the adverse qi flowing downwardization
2And ammoniacal liquor, ammoniacal liquor is reduced to free of contamination nitrogen G﹠W as reducing agent with NOx.
The SCR outlet pipe is to connect the one section pipeline of engine turbine final vacuum pipe with the SCR catalytic converter, is one of indispensable parts of SCR system.The nozzle carrier of fixed nozzle is installed on the SCR outlet pipe, and the installation of nozzle carrier on outlet pipe is related to urea and is sprayed at the angle in the outlet pipe and the quality of mixing quality.
Present existing smoke-ejecting pipe just connects motor and baffler, does not possess urea-spray and urea and smoke evacuation mixed function.
Summary of the invention
The purpose of this utility model provides a kind of normal injection that can realize urea and urea and smoke evacuation well-mixed smoke-ejecting pipe with urea and smoke evacuation mixed function.
The purpose of this utility model realizes in the following manner:
The utility model comprises the smoke-ejecting pipe main body, it is characterized in that: be provided with nozzle bearing on the bend loss of smoke-ejecting pipe main body, urea nozzle is housed on the nozzle bearing.
The spraying center line of described urea nozzle is with the horizontal component center line deflection angle α of smoke-ejecting pipe main body=3 °～5 °.
The utility model has the advantages that: satisfied the eject request of urea-spray system, realized fully mixing of the normal injection of urea and urea and smoke evacuation.And can prevent that urea is directly injected on the tube wall, form urea crystals, the whole vent systems after the corrosion urea nozzle.Adopt the deflection angle method to offset exhaust airstream again, urea is fully mixed with exhaust spraying the influence of urea.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
With reference to accompanying drawing, the utility model comprises smoke-ejecting pipe main body 1, is provided with nozzle bearing 2 on the bend loss of smoke-ejecting pipe main body 1, and the urea nozzle 3 that is used for urea-spray is housed on the nozzle bearing 2.Nozzle bearing 2 designs can avoid urea to be directly injected on the tube wall on bend loss.Nozzle bearing 2 processing is when bend loss, because the urea spraying is subjected to the effect of air-flow, when design nozzle bearing operative position, should be able to guarantee that urea spraying center line is offset toward the air-flow source direction, with as the compensation that is subjected to airflow influence.The method that adopts is the deflection angle method, that is: the spraying center line that makes urea nozzle is with angle [alpha]=3 of smoke-ejecting pipe main body 1 horizontal component center line deflection °～5 °.The size of deflection angle is relevant with the size of elbow radius.The big more then deflection angle of elbow radius is more little.In addition, install on nozzle bearing 2 for fear of urea nozzle 3 and anti-situation to occur adorning, the center line of the nozzle bearing 2 certain distance of disalignment with urea nozzle 3 can be generally about 7.5mm.
Claims (2)
1. the smoke-ejecting pipe with urea and smoke evacuation mixed function comprises the smoke-ejecting pipe main body, it is characterized in that: be provided with nozzle bearing on the bend loss of smoke-ejecting pipe main body, urea nozzle is housed on the nozzle bearing.
2. the smoke-ejecting pipe with urea and smoke evacuation mixed function according to claim 1 is characterized in that: the spraying center line of urea nozzle is with the horizontal component center line deflection angle α of smoke-ejecting pipe main body=3 °～5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205962005U CN201818352U (en) | 2010-10-29 | 2010-10-29 | Exhaust pipe with function of mixing urea with exhausted smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205962005U CN201818352U (en) | 2010-10-29 | 2010-10-29 | Exhaust pipe with function of mixing urea with exhausted smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818352U true CN201818352U (en) | 2011-05-04 |
Family
ID=43916312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205962005U Expired - Fee Related CN201818352U (en) | 2010-10-29 | 2010-10-29 | Exhaust pipe with function of mixing urea with exhausted smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041433A (en) * | 2015-09-01 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Automotive SCR system |
-
2010
- 2010-10-29 CN CN2010205962005U patent/CN201818352U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041433A (en) * | 2015-09-01 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Automotive SCR system |
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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: 20110504 Termination date: 20141029 |
|
| EXPY | Termination of patent right or utility model |