CN102373997A - SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment - Google Patents
SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment Download PDFInfo
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- CN102373997A CN102373997A CN2011102890165A CN201110289016A CN102373997A CN 102373997 A CN102373997 A CN 102373997A CN 2011102890165 A CN2011102890165 A CN 2011102890165A CN 201110289016 A CN201110289016 A CN 201110289016A CN 102373997 A CN102373997 A CN 102373997A
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- gas
- right baffle
- plate
- mixing chamber
- catalytic converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides an SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment. The SCR catalytic converter comprises a shell, a left baffle, a right baffle, a gas inlet tube, a gas return pipe, a gas outlet tube and a catalyst carrier component, wherein the left and right baffles are installed in the shell at intervals and divide the shell into a gas suction cavity, a mixed cavity and a gas exhaust cavity; the left baffle is provided with multiple opening holes which can communicate the gas suction cavity with the mixed cavity; the gas inlet tube is inserted in the shell from the left end face of the shell, penetrates through the left baffle and is closely connected with the right baffle, the gas inlet tube is provided with multiple rows of small holes at the position of the mixed cavity; the gas return pipe is inserted from the left baffle, is closely connected with the right baffle and is provided with multiple rows of small holes; the gas outlet tube is inserted in the shell from the right end face of the shell; and the catalyst carrier component is arranged in the mixed cavity, the axial direction of the catalyst carrier component is in parallel to that of the gas inlet tube and is respectively communicated with the gas suction cavity and the gas exhaust cavity. The SCR catalytic converter provided by the invention has the advantages and characteristics of good flow property, better mixing property of exhausted gas and urea and moderate pressure loss, thus having a certain function of noise elimination.
Description
Technical field
The present invention relates to diesel exhaust aftertreatment system field, relate 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 object of the invention 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 present invention, 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 present invention, 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 diesel engine vent gas is handled that is used for of the present invention; 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 diesel engine vent gas is handled that is used for of the present invention, 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 present invention has the advantage that mixed performance is good, crushing is moderate and the characteristics of good flowing properties, exhaust and urea, and has the effect of certain noise elimination.
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 present invention.
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 present invention.
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 present invention 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 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 (2) 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 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 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 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 |
|---|---|---|---|
| CN2011102890165A CN102373997B (en) | 2011-09-26 | 2011-09-26 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102890165A CN102373997B (en) | 2011-09-26 | 2011-09-26 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
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|---|---|
| CN102373997A true CN102373997A (en) | 2012-03-14 |
| CN102373997B CN102373997B (en) | 2013-05-15 |
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|---|---|---|---|
| CN2011102890165A Active CN102373997B (en) | 2011-09-26 | 2011-09-26 | SCR (selective catalytic reduction) catalytic converter for diesel engine tail gas treatment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
| CN109069997A (en) * | 2015-09-30 | 2018-12-21 | 罗伯特·博世有限公司 | Vortex mixed exhaust aftertreatment case and system |
| CN109162790A (en) * | 2018-07-02 | 2019-01-08 | 上海诺骋工程机械排气系统有限公司 | A kind of compact exhaust gas aftertreatment system |
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| US5218817A (en) * | 1991-04-26 | 1993-06-15 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus of purifying exhaust gas from internal combustion engine |
| WO2003071104A1 (en) * | 2002-02-25 | 2003-08-28 | Renault V.I. | Exhaust line and motor vehicle equipped therewith |
| DE202004013219U1 (en) * | 2004-08-16 | 2004-10-14 | As-Motor Germany Gmbh & Co. Kg | Exhaust silencer for an internal combustion engine comprises an inlet pipe passing through a wire catalyst and through which an exhaust gas flows against the direction of flow from a deviating chamber |
| CN101425258A (en) * | 2008-10-30 | 2009-05-06 | 周晓东 | LED screen information publishing method based on GPS and equipment thereof |
| CN201326445Y (en) * | 2008-12-18 | 2009-10-14 | 重庆迈崴机器有限公司 | Purification silencer for engine tail gas |
| CN201330637Y (en) * | 2008-12-18 | 2009-10-21 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter used for exhaust system of diesel engine |
| CN202360191U (en) * | 2011-09-26 | 2012-08-01 | 杭州银轮科技有限公司 | Diesel engine tail gas processing SCR catalytic converter |
-
2011
- 2011-09-26 CN CN2011102890165A patent/CN102373997B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5218817A (en) * | 1991-04-26 | 1993-06-15 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus of purifying exhaust gas from internal combustion engine |
| WO2003071104A1 (en) * | 2002-02-25 | 2003-08-28 | Renault V.I. | Exhaust line and motor vehicle equipped therewith |
| DE202004013219U1 (en) * | 2004-08-16 | 2004-10-14 | As-Motor Germany Gmbh & Co. Kg | Exhaust silencer for an internal combustion engine comprises an inlet pipe passing through a wire catalyst and through which an exhaust gas flows against the direction of flow from a deviating chamber |
| CN101425258A (en) * | 2008-10-30 | 2009-05-06 | 周晓东 | LED screen information publishing method based on GPS and equipment thereof |
| CN201326445Y (en) * | 2008-12-18 | 2009-10-14 | 重庆迈崴机器有限公司 | Purification silencer for engine tail gas |
| CN201330637Y (en) * | 2008-12-18 | 2009-10-21 | 上海天纳克排气系统有限公司研发分公司 | Catalytic converter used for exhaust system of diesel engine |
| CN202360191U (en) * | 2011-09-26 | 2012-08-01 | 杭州银轮科技有限公司 | Diesel engine tail gas processing SCR catalytic converter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
| CN109069997A (en) * | 2015-09-30 | 2018-12-21 | 罗伯特·博世有限公司 | Vortex mixed exhaust aftertreatment case and system |
| CN109069997B (en) * | 2015-09-30 | 2021-04-23 | 罗伯特·博世有限公司 | Rotational flow mixed type tail gas post-treatment box and system |
| CN109162790A (en) * | 2018-07-02 | 2019-01-08 | 上海诺骋工程机械排气系统有限公司 | A kind of compact exhaust gas aftertreatment system |
| CN109162790B (en) * | 2018-07-02 | 2021-08-20 | 上海诺骋工程机械排气系统有限公司 | Compact type tail gas post-treatment system |
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| Publication number | Publication date |
|---|---|
| CN102373997B (en) | 2013-05-15 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A SCR catalytic converter for diesel exhaust treatment Effective date of registration: 20210610 Granted publication date: 20130515 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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Date of cancellation: 20220627 Granted publication date: 20130515 Pledgee: Bank of China Limited by Share Ltd. Tiantai County branch Pledgor: ZHEJIANG YINLUN MACHINERY Co.,Ltd. Registration number: Y2021330000510 |
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