CN202360191U - Diesel engine tail gas processing SCR catalytic converter - Google Patents
Diesel engine tail gas processing SCR catalytic converter Download PDFInfo
- Publication number
- CN202360191U CN202360191U CN201120363201XU CN201120363201U CN202360191U CN 202360191 U CN202360191 U CN 202360191U CN 201120363201X U CN201120363201X U CN 201120363201XU CN 201120363201 U CN201120363201 U CN 201120363201U CN 202360191 U CN202360191 U CN 202360191U
- Authority
- CN
- China
- Prior art keywords
- gas
- right baffle
- housing
- plate
- chamber
- 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.)
- Withdrawn - After Issue
Links
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 title claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 8
- 239000004202 carbamide Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 47
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical group O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001321 HNCO Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
A diesel engine tail gas processing SCR catalytic converter comprises a housing, a left baffle, a right baffle, a gas inlet pipe, a gas backflow pipe, a gas outlet pipe and a catalyst carrier assembly. The left baffle and the right baffle which are equipped inside the housing in a spaced way divide the housing into a gas inlet chamber, a mixed chamber and a gas outlet chamber. The left baffle is provided with a plurality of open holes which make the gas inlet chamber and the mixed chamber communicated with each other. The gas inlet pipe which is inserted into the housing from the left end face of the housing passes through the left baffle and is then connected with the right baffle in a sealed way. The gas inlet pipe part on the mixed chamber is provided with multiple rows of small holes. The gas backflow pipe which is inserted from the left baffle is connected with the right baffle in a sealed way. The gas backflow pipe is provided with multiple rows of small holes. The gas outlet pipe is inserted into the housing from the right end face of the housing. The catalyst carrier assembly is equipped inside the mixed chamber. The axial direction of the catalyst carrier assembly is parallel to that of the gas inlet pipe. The catalyst carrier assembly is respectively communicated with the gas inlet chamber and the gas outlet chamber. The diesel engine tail gas processing SCR catalytic converter provided in the utility model has the advantages and characteristics of good flow performance, excellent mixed performances of exhaust and urea, moderate pressure loss and certain noise abating effects.
Description
Technical field
The utility model relates to diesel exhaust aftertreatment system field, relates to the SCR catalyst converter that diesel engine vent gas is handled in particular.
Background technique
Diesel engine is all 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 nitrogen oxide (NO that there is maximum problem in diesel engine
x) and particulate matter (PM) discharging seriously.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 device of machine to reach emissions object.
Diesel motor exhaust SCR technology (SCR) is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve diesel engine NO
xDischarging, and insensitive to the diesel oil sulphur content.This technology is through spraying into certain density urea liquid, the NH that after pyrolysis (reaction 1) and hydrolysis (reaction 2), produces in outlet pipe
3And NO
xReduction reaction (reaction 3-5) takes place in catalytic converter, with NO
xBe converted into H
2O and N
2
(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 evaluation index of the SCR catalytic converter that is used for the diesel engine vent gas processing, can estimate by following index:
1, the distribution of fluid between each catalyst carrier and the flow uniformity value of each catalyst carrier front-end face.
Improve the mass flow distribution of tail gas between each catalyst carrier, help improving the utilization ratio of carried catalyst, improve the transformation efficiency of catalyzer; Help reducing the pressure loss of air-flow on catalyst carrier; Help catalyst carrier and reach initiation temperature faster.
2, the pressure loss of system
A part of whole vent systems during the pressure loss of catalytic converter, 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 on catalyst carrier.Air speed is more little, and the waiting time of air-flow in catalyst carrier is long more, and transformation efficiency is just high more.
4, acoustic insertion loss
Summary of the invention
The purpose of the utility model is to provide the mixed performance of a kind of good flowing properties, exhaust and urea good, crushing is moderate, and has certain noise elimination function, is used for the SCR catalytic converter that diesel engine vent gas is handled.
For realizing above purpose, the technological scheme that this patent adopts is:
A kind of SCR catalytic converter that is used for the diesel engine vent gas processing; Comprise housing, right baffle-plate, right baffle plate, gas inlet pipe, gas backstreaming pipe, gas outlet tube and one or more catalyst carrier assembly that laterally arranges; Left baffle is installed in the housing at interval, and housing is separated into the air-inlet cavity in left side, the mixing chamber of centre and the outlet chamber on right side; Right baffle-plate is separated air-inlet cavity and mixing chamber, and right baffle-plate is provided with a plurality of perforates, can air-inlet cavity and mixing chamber be communicated with; Right baffle plate is separated mixing chamber and outlet chamber; Gas inlet pipe is inserted in the housing from the housing left side, passes right baffle-plate, is connected with right baffle plate sealing, and gas inlet pipe is opened many row's apertures in the mixing chamber position; The gas backstreaming pipe inserts from right baffle-plate top and places in the described mixing chamber, and is connected with right baffle plate sealing, opens many row's apertures on the described gas backstreaming pipe; The gas steam outlet pipe inserts housing from the housing right side; Described catalyst carrier assembly is arranged in the mixing chamber; Its axial and gas inlet tube parallel to an axis; And be connected between right baffle-plate and the right baffle plate; Be communicated with air inlet, two chambeies of giving vent to anger respectively, described each catalyst carrier assembly comprises at least one carrier, is coated on the outer liner of carrier and is coated on the outer shell of liner that described carrier is provided with many axial passages that run through both ends of the surface.
According to the utility model, be provided with one or more catalyst carrier assemblies that laterally arrange in the described mixing chamber, described each catalyst carrier assembly comprises the carrier of two or more series connection.Shell and liner can be protected and holding carrier in the catalyst carrier assembly, prevent that carrier lost efficacy at work.
According to the utility model, described each catalyst carrier is cylindrical structural, and is provided with many parallel channels that run through both ends of the surface vertically, and the internal surface of each passage is provided with catalyst coat.Described catalyzer is that zeolite based catalysts or scherbinaite are catalyst based.Axial passage on the described carrier is a straight way.
A kind of SCR catalytic converter that is used for the diesel engine vent gas processing of the utility model; Gas inlet pipe is connected with diesel engine exhaust; Diesel engine exhaust and urea get into gas inlet pipe after the aperture on it gets into mixing chamber, and gas and urea mix in mixing chamber, then the aperture entering air-inlet cavity from the right baffle-plate; Get into outlet chamber through each axial passage in the carrier again, discharge from tail pipe through gas outlet tube at last.
A kind of SCR catalytic converter that is used for the diesel engine vent gas processing of the utility model, the structure of air-inlet cavity, mixing chamber, gas inlet pipe and gas reflow pipe can guarantee that urea and exhaust have enough spaces to mix.The utlity model has the advantage that mixed performance is good, crushing is moderate and the characteristics of good flowing properties, exhaust and urea, and have the effect of certain noise elimination.
Description of drawings
Fig. 1 is a kind of overall structure schematic representation that is used for the SCR catalytic converter of diesel engine vent gas processing of the utility model.
Fig. 2 is the top plan view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is the structural representation of one group of catalyst carrier assembly of the utility model.
Fig. 5 is the enlarged view at B place among Fig. 4.
Fig. 6 is the enlarged view at C place among Fig. 4.
Wherein: the 1-air-inlet cavity; The 2-mixing chamber; The 3-outlet chamber; The 4-housing; The 5-right baffle-plate; The 6-gas inlet pipe; 7-catalyst carrier assembly; 8-gas backstreaming pipe; The right baffle plate of 9-; The 10-gas outlet tube; Aperture on the 61-gas inlet pipe; 71,73-catalyst carrier; 72,74-catalyst carrier assembly liner; 75-catalyst carrier package shell; The aperture of 81-gas backstreaming pipe.
Embodiment
Referring to Fig. 1 and Fig. 2; A kind of SCR catalytic converter that is used for the diesel engine vent gas processing; Comprise air-inlet cavity 1, mixing chamber 2, outlet chamber 3, housing 4, right baffle-plate 5, gas inlet pipe 6, catalyst carrier assembly 7, gas backstreaming pipe 8,, right baffle plate 9, gas outlet tube 10.Right baffle-plate 5 is installed in the housing 4 with right baffle plate 9 at interval, and housing 4 is separated into air-inlet cavity 1, mixing chamber 2 and outlet chamber 3; Right baffle-plate 5 is separated air-inlet cavity 1 and mixing chamber 2, and right baffle-plate 5 is provided with a plurality of perforates, can air-inlet cavity 1 and mixing chamber 2 be communicated with; Right baffle plate 9 is separated mixing chamber 2 and outlet chamber 3; Gas inlet pipe 6 is inserted in the housing from top, housing left side, passes right baffle-plate 5, is connected with right baffle plate 9 sealings, and gas inlet pipe 6 is opened many row's apertures 61 in the mixing chamber position; Gas backstreaming pipe 8 inserts from right baffle-plate top and is placed in the described mixing chamber 2, and is connected with right baffle plate sealing, and opens many row's apertures 81 on the gas backstreaming pipe 8; Gas outlet tube 10 inserts housing from bottom, housing right side; Catalyst carrier assembly 7 is arranged in the mixing chamber, its axial and gas inlet tube parallel to an axis, and be connected between right baffle-plate 5 and the right baffle plate 9, be communicated with air-inlet cavity 1 and outlet chamber 3 respectively.
Referring to Fig. 4, catalyst carrier assembly 7 comprises carrier 71,73, is coated on the outer liner 72,74 of carrier and is coated on the outer shell 75 of liner.Described catalyst carrier assembly 7 is in series by two catalyst carriers 71,73; Described each catalyst carrier 71,73 outer 72,74 coating of liner of suppressed by vector respectively, catalyst carrier package shell 75 connects catalyst carrier 71,73 and liner 72,74 and coating.Described each catalyst carrier 71,73 is cylindrical structural, and it is axially arranged with many parallel channels 711,731 that connect both ends of the surface, and the internal surface of each passage is provided with catalyst coat.Shell and liner can be protected and holding carrier, prevent that carrier lost efficacy at work.
The working principle that the utility model is used for the SCR catalytic converter of diesel engine vent gas processing can combine Fig. 1 and Fig. 2 to explain as follows:
Claims (4)
1. one kind is used for the SCR catalytic converter that diesel engine vent gas is handled; Comprise housing (4), right baffle-plate (5), gas inlet pipe (6), gas backstreaming pipe (8), right baffle plate (9), gas outlet tube (10) and one or more catalyst carrier assembly (7) that laterally arranges; It is characterized in that described right baffle-plate (5) and right baffle plate (9) are installed in the described housing (4) at interval, described housing (4) is separated into the air-inlet cavity (1) in left side, the mixing chamber (2) of centre and the outlet chamber (3) on right side; Described right baffle-plate (5) is separated air-inlet cavity (1) and mixing chamber (2), and right baffle-plate (5) is provided with a plurality of perforates, can air-inlet cavity (1) and mixing chamber (2) be communicated with; Described right baffle plate (9) is separated mixing chamber (2) and outlet chamber (3); Described gas inlet pipe (6) is inserted in the housing (4) from housing (4) left side, passes right baffle-plate (5), is connected with right baffle plate (9) sealing, and gas inlet pipe (6) is opened many row's apertures (61) in the mixing chamber position; Described gas backstreaming pipe (8) inserts and places in the described mixing chamber (2) from right baffle-plate (5), is connected with right baffle plate (9) sealing, opens the apertures (81) of arranging on the described gas backstreaming pipe (8) more; Described gas outlet tube (10) inserts housing (4) from housing (4) right side; Described catalyst carrier assembly is arranged in the mixing chamber (2); Its axial and gas inlet tube (6) parallel to an axis; And be connected between right baffle-plate (5) and the right baffle plate (9); And be communicated with air-inlet cavity (1) and outlet chamber (3) respectively, described each catalyst carrier assembly (7) comprises at least one carrier (71,73), is coated on the outer liner (72,74) of carrier and is coated on the outer shell (75) of liner that described carrier (71,73) is provided with many axial passages (711,731) that run through both ends of the surface.
2. the SCR catalytic converter that is used for the diesel engine vent gas processing according to claim 1; It is characterized in that being provided with in the described mixing chamber (2) one or more catalyst carrier assemblies (7) that laterally arrange, described each catalyst carrier assembly (7) comprises the carrier (71,73) of two or more series connection.
3. the SCR catalytic converter that is used for the diesel engine vent gas processing according to claim 2; It is characterized in that each carrier (71,73) is cylindrical structural; And being provided with many parallel channels (711,731) that run through both ends of the surface vertically, the internal surface of each passage is provided with catalyst coat.
4. according to any one described SCR catalytic converter that is used for the diesel engine vent gas processing of claim 1-3, it is characterized in that the axial passage (711,731) on the described carrier (71,73) is the straight way passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120363201XU CN202360191U (en) | 2011-09-26 | 2011-09-26 | Diesel engine tail gas processing SCR catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120363201XU CN202360191U (en) | 2011-09-26 | 2011-09-26 | Diesel engine tail gas processing SCR catalytic converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202360191U true CN202360191U (en) | 2012-08-01 |
Family
ID=46571382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120363201XU Withdrawn - After Issue CN202360191U (en) | 2011-09-26 | 2011-09-26 | Diesel engine tail gas processing SCR catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202360191U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373997A (en) * | 2011-09-26 | 2012-03-14 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
| CN103573351A (en) * | 2012-07-20 | 2014-02-12 | 曼卡车和巴士股份公司 | Mixing device for the aftertreatment of exhaust gases |
| DE102013114111A1 (en) * | 2013-12-16 | 2015-06-18 | Tenneco Gmbh | Mixing tube arrangement with housing |
| CN105422232A (en) * | 2015-12-03 | 2016-03-23 | 安徽江淮汽车股份有限公司 | Catalysis silencer structure |
| US10337379B2 (en) | 2014-02-07 | 2019-07-02 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer assembly for a vehicle exhaust system |
| US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
-
2011
- 2011-09-26 CN CN201120363201XU patent/CN202360191U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373997A (en) * | 2011-09-26 | 2012-03-14 | 杭州银轮科技有限公司 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
| CN103573351A (en) * | 2012-07-20 | 2014-02-12 | 曼卡车和巴士股份公司 | Mixing device for the aftertreatment of exhaust gases |
| DE102013114111A1 (en) * | 2013-12-16 | 2015-06-18 | Tenneco Gmbh | Mixing tube arrangement with housing |
| CN105940195A (en) * | 2013-12-16 | 2016-09-14 | 田纳科有限责任公司 | Mixing pipe arrangement with housing |
| EP3084163B1 (en) * | 2013-12-16 | 2017-11-29 | Tenneco GmbH | Mixing pipe arrangement with housing |
| CN105940195B (en) * | 2013-12-16 | 2018-08-28 | 田纳科有限责任公司 | Mixing tube device with housing |
| US10072550B2 (en) | 2013-12-16 | 2018-09-11 | Tenneco Gmbh | Mixing pipe arrangement with housing |
| US10337379B2 (en) | 2014-02-07 | 2019-07-02 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer assembly for a vehicle exhaust system |
| CN105422232A (en) * | 2015-12-03 | 2016-03-23 | 安徽江淮汽车股份有限公司 | Catalysis silencer structure |
| US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120801 Effective date of abandoning: 20130515 |
|
| RGAV | Abandon patent right to avoid regrant |