CN201330638Y - Selective catalytic reduction converter - Google Patents
Selective catalytic reduction converter Download PDFInfo
- Publication number
- CN201330638Y CN201330638Y CNU2008201573918U CN200820157391U CN201330638Y CN 201330638 Y CN201330638 Y CN 201330638Y CN U2008201573918 U CNU2008201573918 U CN U2008201573918U CN 200820157391 U CN200820157391 U CN 200820157391U CN 201330638 Y CN201330638 Y CN 201330638Y
- Authority
- CN
- China
- Prior art keywords
- air
- catalytic reduction
- selective catalytic
- chamber
- outlet tube
- 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 - Lifetime
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- Exhaust Gas After Treatment (AREA)
Abstract
A selective catalytic reduction converter comprises a catalyst carrier component, an air inlet chamber, an air outlet chamber, an air inlet pipe and an air outlet pipe, wherein, the catalyst carrier component is arranged transversely; the air inlet chamber and the air outlet chamber are connected at the front and the back two ends of the catalyst carrier component respectively; the air inlet pipe is vertically inserted into the air inlet chamber, and is communicated with the air inlet chamber; the air outlet pipe is transversely inserted into the air outlet chamber, and is communicated with the air outlet chamber; and a plurality of vent holes are formed at the parts of the air inlet pipe and the air outlet pipe, which are inserted into the chambers. The selective catalytic reduction converter has good flowing performance, moderate loss of pressure, as well as the effect of silencing.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas processing equipment, particularly a kind of selective catalytic reduction converter of diesel motor exhaust.
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 diesel engine 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 selective catalytic reduction technology of diesel motor exhaust 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.This technology is by spraying into certain density urea liquid in outlet pipe, reduction reaction (reaction 3-5) takes place in ammonia that produces after pyrolysis (reaction 1) and hydrolysis (reaction 2) and nitrogen oxide in catalytic converter, be water vapour and nitrogen (reaction 3-5 needs could effectively carry out at a certain temperature) with conversion of nitrogen oxides.
(NH
2)
2CO→NH
3+HNCO (1)
H
2O+HNCO→NH
3+CO
2 (2)
4NO+4NH
3+O
2→4N
2+6H
2O (3)
2NH
3+NO+NO
2→2N
2+3H
2O (4)
6NO
2+8NH
3→7N
2+12H
2O (5)
For the main performance of selective catalytic reduction converter, can assess by following index.
1, the distribution of fluid between each carrier and the flow uniformity value of each carrier front-end face
Improve the mass flow distribution of waste gas between each carrier, help improving the utilization ratio of carried catalyst; Help reducing the pressure loss of air-flow on carrier; Help carrier and reach initiation temperature faster.
2, the pressure loss of system
The pressure loss of catalytic converter is a part of whole vent systems crushing, and the pressure loss that reduces catalytic converter helps reducing the back pressure of vent systems, thereby helps improving the performance of motor.
3, air speed
The size of air speed has been reacted the waiting time of air-flow in carrier.Air speed is more little, and the waiting time of air-flow in carrier is long more, helps reducing the reduction reaction of nitrogen oxide more.
4, acoustic insertion loss.
The model utility content
The purpose of this utility model is to provide a kind of good flowing properties, the moderate selective catalytic reduction converter of crushing.
The purpose of this utility model is achieved in that a kind of selective catalytic reduction converter, comprises catalyst carrier assembly, air-inlet cavity, outlet chamber, gas inlet pipe and gas outlet tube;
Described catalyst carrier assembly cross setting; Described air-inlet cavity and outlet chamber are connected to the rear and front end of catalyst carrier assembly; Described gas inlet pipe is vertically inserted in the air-inlet cavity and with air-inlet cavity and is communicated with; Be communicated with in the laterally inserted outlet chamber of described gas outlet tube and with outlet chamber, the part in the insertion cavity of gas inlet pipe and gas outlet tube is respectively equipped with a plurality of vents.
Described catalyst carrier assembly comprises the carrier of three sections order polyphones, and each carrier is the cylindrical ceramic goods, is provided with many parallel channels in the carrier vertically and connects both ends of the surface, and the internal surface of each passage is provided with catalyst coat.
Described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
Be provided with a vertical baffle plate in the described outlet chamber outlet chamber is divided into inner chamber and exocoel, baffle plate is provided with a plurality of vents; Described gas outlet tube passes from this baffle plate and stretches into inner chamber, and a plurality of vents on the gas outlet tube all are arranged in exocoel.
The inner of described gas outlet tube is provided with horn mouth.
Diesel motor exhaust catalyst of the present utility model is fluid mechanics (CFD) flow analysis and acoustic analysis demonstration as calculated, shows that it has good flowing properties, moderate advantage and the characteristics of crushing, and has the effect of silencing apparatus.The design of air-inlet cavity, outlet chamber, perforated retainer and perforation gas outlet tube can guarantee that air-flow pressure loss when flowing through catalytic converter is moderate; Housing in the carrier module and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle driving; The design of perforated retainer, perforation gas inlet and outer pipe also makes catalytic converter have the noise elimination effect of silencing apparatus.
Description of drawings
Fig. 1 is the overall structure schematic representation of the utility model selective catalytic reduction converter;
Fig. 2 is the structural representation of the carrier module in the utility model.
Embodiment
Referring to Fig. 1, selective catalytic reduction converter of the present utility model comprises housing 1, catalyst carrier assembly 7, air-inlet cavity 8, outlet chamber 6, gas inlet pipe 2 and gas outlet tube 5.
Cooperation is referring to referring to Fig. 2, catalyst carrier assembly 7 cross settings in the utility model, it comprise three sections order polyphones carriers 71, be coated on the outer liner 72 of carrier and be coated on the outer housing 73 of liner.Each carrier 71 is the cylindrical ceramic goods, is provided with many parallel channels in the carrier vertically and connects both ends of the surface, and the internal surface of each passage is provided with catalyst coat.Can be catalyst based as the catalyzer of catalyst coat for zeolite based catalysts or scherbinaite.Housing and liner can be protected and holding carrier, prevent carrier broken inefficacy in vehicle driving.
Air-inlet cavity 8 and outlet chamber 6 are connected to the rear and front end of catalyst carrier assembly, are provided with thermal-protective material 3 between air-inlet cavity 8 and housing 1.Be provided with a vertical baffle plate 4 in outlet chamber outlet chamber is divided into inner chamber and exocoel, baffle plate 4 is provided with a plurality of vents.Gas outlet tube 5 passes from this baffle plate and stretches into inner chamber, and a plurality of vents on the gas outlet tube all are arranged in exocoel.
Gas inlet pipe 2 vertical insertions in the air-inlet cavity 8 and with air-inlet cavity are communicated with; Be communicated with in the gas outlet tube 5 laterally inserted outlet chambers 6 and with outlet chamber, the part in the insertion cavity of gas inlet pipe and gas outlet tube is respectively equipped with a plurality of vents.The inner at gas outlet tube 5 is provided with horn mouth.
The working principle of the utility model selective catalytic reduction converter can be described as follows in conjunction with Fig. 1:
Diesel motor exhaust enters air-inlet cavity 8 by gas inlet pipe 2, the carrier module 7 of flowing through after air-flow is recombinated in air-inlet cavity 8, and chemical reaction takes place to reduce nitrogen oxide at this in its each composition.Air-flow enters outlet chamber 6 after carrier module 7 is handled.Outlet chamber 6 has and has noise elimination function.At last, air communication is crossed gas outlet tube 5 and is discharged from tail pipe.
Claims (5)
1, a kind of selective catalytic reduction converter comprises catalyst carrier assembly, air-inlet cavity, outlet chamber, gas inlet pipe and gas outlet tube; It is characterized in that:
Described catalyst carrier assembly cross setting; Described air-inlet cavity and outlet chamber are connected to the rear and front end of catalyst carrier assembly; Described gas inlet pipe is vertically inserted in the air-inlet cavity and with air-inlet cavity and is communicated with; Be communicated with in the laterally inserted outlet chamber of described gas outlet tube and with outlet chamber, the part in the insertion cavity of gas inlet pipe and gas outlet tube is respectively equipped with a plurality of vents.
2, selective catalytic reduction converter according to claim 1, it is characterized in that: described catalyst carrier assembly comprises the carrier of three sections order polyphones, each carrier is the cylindrical ceramic goods, be provided with many parallel channels in the carrier vertically and connect both ends of the surface, the internal surface of each passage is provided with catalyst coat.
3, selective catalytic reduction converter according to claim 2 is characterized in that: described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.
4, selective catalytic reduction converter according to claim 1 is characterized in that: be provided with a vertical baffle plate in the described outlet chamber outlet chamber is divided into inner chamber and exocoel, baffle plate is provided with a plurality of vents; Described gas outlet tube passes from this baffle plate and stretches into inner chamber, and a plurality of vents on the gas outlet tube all are arranged in exocoel.
5, selective catalytic reduction converter according to claim 1 is characterized in that: the inner of described gas outlet tube is provided with horn mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201573918U CN201330638Y (en) | 2008-12-18 | 2008-12-18 | Selective catalytic reduction converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201573918U CN201330638Y (en) | 2008-12-18 | 2008-12-18 | Selective catalytic reduction converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330638Y true CN201330638Y (en) | 2009-10-21 |
Family
ID=41224016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201573918U Expired - Lifetime CN201330638Y (en) | 2008-12-18 | 2008-12-18 | Selective catalytic reduction converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330638Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745314B (en) * | 2008-12-18 | 2012-01-18 | 上海天纳克排气***有限公司研发分公司 | Selective catalytic reduction converter |
| EP2580440B1 (en) | 2010-06-10 | 2015-11-25 | Emitec Gesellschaft für Emissionstechnologie mbH | Exhaust gas treatment apparatus |
-
2008
- 2008-12-18 CN CNU2008201573918U patent/CN201330638Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745314B (en) * | 2008-12-18 | 2012-01-18 | 上海天纳克排气***有限公司研发分公司 | Selective catalytic reduction converter |
| EP2580440B1 (en) | 2010-06-10 | 2015-11-25 | Emitec Gesellschaft für Emissionstechnologie mbH | Exhaust gas treatment apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Dan Xiaofeng Inventor after: Li Bing Inventor after: Shen Feng Inventor after: Zhang Baolong Inventor after: Wu Lin Inventor after: fan Qiang Inventor before: Dan Xiaofeng Inventor before: Li Bing Inventor before: Shen Feng Inventor before: Zhang Baolong Inventor before: Wu Lin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: DAN XIAOFENG; LI BING; SHEN FENG; ZHANG BAOLONG; WU LIN TO: DAN XIAOFENG; LI BING; SHEN FENG; ZHANG BAOLONG; WU LIN; FAN JIANQIANG |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091021 Effective date of abandoning: 20081218 |