CN202157847U - Construction machinery SCR post processor - Google Patents
Construction machinery SCR post processor Download PDFInfo
- Publication number
- CN202157847U CN202157847U CN2011201767440U CN201120176744U CN202157847U CN 202157847 U CN202157847 U CN 202157847U CN 2011201767440 U CN2011201767440 U CN 2011201767440U CN 201120176744 U CN201120176744 U CN 201120176744U CN 202157847 U CN202157847 U CN 202157847U
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- scr
- engineering machinery
- mixing chamber
- cavity
- reactant
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Abstract
A construction machinery SCR post processor includes a casing, wherein an inlet mixture cavity, a reactant cavity and a gassing mixture cavity are sequentially arranged in the casing; an air inlet pipe is connected onto the side surface of the inlet mixture cavity; at least one exhaust pipe is connected onto the side surface of the gassing mixture cavity; and the reactant cavity is filled with reactant carriers and coated with a catalyst coating. The construction machinery SCR post processor has the characteristics of high response speed, reliability, and sensitivity as well as compact structure, and can operate with a urea injection system to efficiently meet the requirements of catalysis conversion efficiency and machinery noise reduction of the SCR system without the need of adding engine body components and a silencer.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas processing equipment, particularly a kind of engineering machinery SCR preprocessor.
Background technique
Diesel engine is having remarkable advantages than petrol engine aspect power character, Economy and the reliability, particularly CO
2Discharge lowly, its purposes expands on all kinds of vehicles gradually.But it is that nitrogen oxide and particulate emission are serious that there is maximum problem in diesel engine.Along with Chinese emission control regulations are more and more tighter, and homemade DENG performance and oil product problem, depend the emission controls by improving combustion measure alone and seem unable to do what one wishes, therefore be necessary to take the outer after-treatment system of machine to reach emissions object.
The SCR technology is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve the discharging of diesel engine nitrogen oxide, and insensitive to the diesel oil sulphur content.Engineering machinery since long-term work at the big load stage of low speed, so the air temperature and current noise is not obvious, but because engineering machinery is higher to arrangement requirement, therefore requires lowly highly as far as possible to the SCR of engineering machinery, and avoids radiated noise as far as possible.
For the special-purpose SCR catalyst of engineering machinery, can assess by following index.
1, setting height(from bottom)
Optimize silencing apparatus level interval and mixer height.
2, radiated noise
Big planar design is avoided on the optimization system plane.
3, working life
Be the design of car load life-cycle.
The model utility content
The purpose of the utility model is to provide a kind of good flowing properties, the moderate engineering machinery SCR preprocessor of crushing.
The purpose of the utility model is achieved in that a kind of engineering machinery SCR preprocessor, comprises housing, in housing, is sequentially with air inlet mixing chamber, reagent cavities and the mixing chamber of giving vent to anger; Side at the air inlet mixing chamber is connected with suction tude, is connected with at least one outlet pipe in the side of the mixing chamber of giving vent to anger, and in reagent cavities, is filled with the reactant carrier, on the reactant carrier, is coated with catalyst coat.
Described reactant carrier is cylindrical steinheilite goods, is provided with many parallel channels that axially connect in it, and described catalyst coat is coated in the internal surface of each passage.
Described catalyst coat is a vanadium titanium tungsten mixture coating.
Described outlet pipe is two, and two outlet pipes are arranged side by side forms two tail pipes.
Described outlet pipe is a tube for heat exchanger.
The SCR preprocessor of the utility model shows that through finite element analysis (FEA), computational fluid mechanics (CFD) flow analysis demonstration it has the advantage that response is fast, crushing is moderate and reliability is high.
Description of drawings
Fig. 1 is the perspective view of the utility model engineering machinery SCR preprocessor;
Fig. 2 is the structural representation of facing of the utility model engineering machinery SCR preprocessor.
Embodiment
Referring to Fig. 1, Fig. 2, the engineering machinery SCR preprocessor of the utility model comprises housing 1, in housing, is sequentially with air inlet mixing chamber 2, reagent cavities 3 and the mixing chamber 4 of giving vent to anger.Be connected with suction tude 5 in the side of air inlet mixing chamber, be connected with at least one outlet pipe 6 in the side of the mixing chamber of giving vent to anger, in reagent cavities, be filled with reactant carrier 7, on reactant carrier 7, be coated with catalyst coat.Housing 1 wherein is by the Austenitic Stainless Steel manufacturing, and reactant carrier 7 is cylindrical steinheilite goods, is provided with many parallel channels that axially connect in it, and catalyst coat is coated in the internal surface of each passage.This catalyst coat is a vanadium titanium tungsten mixture coating.
Outlet pipe in the utility model can be designed as one or two, and when adopting two outlet pipes, two outlet pipes are arranged side by side forms two tail pipes.
Outlet pipe in the utility model can also be designed to tube for heat exchanger, to reclaim the heat in the tail gas.
The working principle of the utility model engineering machinery SCR preprocessor is; Suction tude 5 links to each other with the outlet pipe of engine exhaust outlet; The waste gas that produces during the diesel engine operation is input in the SCR preprocessor through the connecting tube between diesel engine and the SCR preprocessor; In air inlet mixing chamber 2, make waste gas and the even mixing of ammonia import reagent cavities 3 then through perforated pipe and the mutual turbulent flow of mixing catch, the catalysis through reactant carrier 7 and catalyst coat changes the nitrogen oxide in the diesel exhaust into harmless nitrogen and water vapor, enters atmosphere through outlet pipe 6 again; Accomplish the noise elimination effect simultaneously, effectively reduce the noise level of diesel engine.The utlity model has that speed of response is fast, reliability is high, the characteristics of highly sensitive and compact structure, under the situation that need not increase engine body parts and silencing apparatus with urea-spray system efficient work satisfy entrucking simple and easy with the catalytic conversion efficiency of SCR system and the requirement of car load noise.
The catalytic conversion efficiency of the engineering machinery SCR preprocessor of the utility model is confirmed according to engine exhaust emission quantity, can reach 90%, minimumly reaches 60%.
Claims (4)
1. an engineering machinery SCR preprocessor is characterized in that: comprise housing, in housing, be sequentially with air inlet mixing chamber, reagent cavities and the mixing chamber of giving vent to anger; Side at the air inlet mixing chamber is connected with suction tude, is connected with at least one outlet pipe in the side of the mixing chamber of giving vent to anger, and in reagent cavities, is filled with the reactant carrier, on the reactant carrier, is coated with catalyst coat.
2. engineering machinery SCR preprocessor according to claim 1 is characterized in that: described reactant carrier is cylindrical steinheilite goods, is provided with many parallel channels that axially connect in it, and described catalyst coat is coated in the internal surface of each passage.
3. engineering machinery SCR preprocessor according to claim 1 is characterized in that: described outlet pipe is two, and two outlet pipes are arranged side by side forms two tail pipes.
4. according to claim 1 or 3 described engineering machinery SCR preprocessors, it is characterized in that: described outlet pipe is a tube for heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201767440U CN202157847U (en) | 2011-05-27 | 2011-05-27 | Construction machinery SCR post processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201767440U CN202157847U (en) | 2011-05-27 | 2011-05-27 | Construction machinery SCR post processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202157847U true CN202157847U (en) | 2012-03-07 |
Family
ID=45765488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201767440U Expired - Fee Related CN202157847U (en) | 2011-05-27 | 2011-05-27 | Construction machinery SCR post processor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202157847U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797540A (en) * | 2011-05-27 | 2012-11-28 | 上海天纳克排气系统有限公司 | Selective catalytic reduction (SCR) postprocessor for engineering machine |
| CN107288709A (en) * | 2017-08-22 | 2017-10-24 | 芜湖恒耀汽车零部件有限公司 | A kind of outlet tube assembly of motor vehicle exhaust emission silencer |
| CN107448260A (en) * | 2017-08-22 | 2017-12-08 | 芜湖恒耀汽车零部件有限公司 | A kind of manufacture method of the outlet tube assembly of motor vehicle exhaust emission silencer |
-
2011
- 2011-05-27 CN CN2011201767440U patent/CN202157847U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797540A (en) * | 2011-05-27 | 2012-11-28 | 上海天纳克排气系统有限公司 | Selective catalytic reduction (SCR) postprocessor for engineering machine |
| CN107288709A (en) * | 2017-08-22 | 2017-10-24 | 芜湖恒耀汽车零部件有限公司 | A kind of outlet tube assembly of motor vehicle exhaust emission silencer |
| CN107448260A (en) * | 2017-08-22 | 2017-12-08 | 芜湖恒耀汽车零部件有限公司 | A kind of manufacture method of the outlet tube assembly of motor vehicle exhaust emission silencer |
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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: 20120307 Termination date: 20200527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |