CN102032030A - Composite unit of automobile exhaust catalytic reduction postprocessor - Google Patents
Composite unit of automobile exhaust catalytic reduction postprocessor Download PDFInfo
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- CN102032030A CN102032030A CN2009102177077A CN200910217707A CN102032030A CN 102032030 A CN102032030 A CN 102032030A CN 2009102177077 A CN2009102177077 A CN 2009102177077A CN 200910217707 A CN200910217707 A CN 200910217707A CN 102032030 A CN102032030 A CN 102032030A
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- catalytic reduction
- mixed cell
- tio2
- coated
- postprocessor
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a composite unit of an automobile exhaust catalytic reduction postprocessor. The composite unit is characterized in that: ceramic coatings are coated on the inner wall and the outer wall of the composite unit, and nano-scale TiO2 granules are uniformly and densely distributed on the surface layer of the composite unit; and the catalytic reduction postprocessor is a square box, ceramic coatings are coated on the inner sides of a cavity partition plate and an end plugging plate of the catalytic reduction postprocessor, and nano-scale TiO2 granules are uniformly and densely distributed on the surface layer of the catalytic reduction postprocessor. The structure of the catalytic reduction postprocessor applied on a commercial automobile, the structural parameters are optimized, the effect of the urea mixing unit is improved, the ceramic coatings are increased, and the nano-scale TiO2 granule uniformly and densely distributed on the surface layer strengthen the urea decomposition function and have de-noising effect, certain heat insulation effect and high practical value.
Description
Technical field:
The present invention relates to a kind of recombiner unit of automotive exhaust catalysis reduction preprocessor, be applied to the reprocessing industry of vehicle exhaust, be adapted to catalytic reduction reprocessing structure, also be adapted to POC reprocessing structure.
Background technique:
The automobile post-processing technology comprises SCR (Selective Catalytic Reduction) catalyzed conversion reduction technique at present, DPF (Diesel Particulate Filter) particle trap, DOC (Diesel Oxidation Catalyst) oxidation catalyst etc.The essence of catalytic reduction technology is to utilize urea at high temperature to decomposite NH
3, as the NH of reducing agent
3With the NO in the engine exhaust
xUnder the comprehensive function of catalyzer and temperature, react, generate nontoxic N under the desirable operating mode
2And H
2O, thus reach the purpose of purification.The catalytic reduction technology began abroad the denitration technology that the stationary source as power station etc. uses and has carried out exploitation and extensive use from the seventies.For tackling the requirement of new environmental regulation, abroad the catalytic reduction technology successfully has been transplanted on the diesel car since 90 years, and the corresponding exploitation checking of having carried out catalytic reduction catalysts process engineering and carbamide reducing agent, realized industrial applications, for example, European and Japanese.At present, Ou Zhou most of MANUFACTURER have begun adamantine employing catalytic reduction technology and have realized Europe 4 and Europe 5 standards.
The external reason of so hankering after the catalytic reduction technology mainly is that catalytic reduction has lot of advantages, for example, can have 50～85% NO in the scope of 250～550 ℃ of delivery temperatures
xRemove efficient, and can effectively reduce the emission level of PM; Catalytic reduction can easily satisfy Europe 4 and Europe 5 levels, also has the potentiality that reach Europe 6 levels; Reach the catalytic reduction technology that adopt in Europe 4 at present, the fuel oil consumption of motor can reduce by 3～6%; Catalytic reduction catalysts does not contain precious metal, and is more relatively low than cost; Catalytic reduction is to the quality of fuel oil for vehicles, and particularly Sulpher content is insensitive.Based on above analysis, the catalytic reduction post-processing technology is the vehicle condition and the fuel oil for vehicles situation of suitable China also.
If applied vehicle-mounted catalytic reduction post-processing technology in China in 2008, must resolve the vital technological difficulties such as atomized spray, catalytic reduction catalysts conversion efficiency, ammonia amount of leakage of dosage, the carbamide reducing agent of carbamide reducing agent supply, carbamide reducing agent.The premises all relates to the problem of carbamide reducing agent.In these problems, with the mixing of engine exhaust, and effectively to decompose be a key point behind the atomized spray of carbamide reducing agent.It relates to the problem of blockage problem, catalyst activity problem, carbamide reducing agent corrosion and the coking and blocking nozzle of catalyst surface.
From the chemical terms analysis, urea is higher than all can decompose more than 135 ℃ in temperature emits ammonia, to realize the removing to NOX.But in fact, urea in the engine exhaust pipe of setting out by nozzle ejection after, under higher gas delivery, until before the catalytic reduction activity unit, often can not be effectively mix with atmosphere of exhaust, its efficient that resolves into NH3 is also relatively poor; When perhaps the high-temperature atmosphere that comes out from enmgine exhaust arrived the catalytic reduction activity end, temperature reduced more, can reduce the removal effect of NOX equally.For catalytic reduction insulation problem, external way is that whole system all is to adopt the double-level-metal plate structure, and this has not only increased cost of material, also makes the packaging technology of assembly complicated unusually.
The patent No. is that the patent of 200720018679.2 ' large-duty engine catalytic reduction reprocessing piping device ' is that ' a kind of netted mixer ' is installed on the engine exhaust pipe at urea nozzle rear, purpose also is to improve mixed effect, but, the caliber of outlet pipe is limited, if the Kong Taixiao of net, gas-flow resistance is big, influences motor and turns round normally; Otherwise if the Kong Taida of net does not have gas-flow resistance, but the poor effect of mixing is not considered the insulation problem yet; The patent No. is that the patent of 200580003880.7 ' catalytic reduction silencing apparatus ' is to set up ' concentrically ringed porous slab ' structure before the inlet of catalytic reduction activity end; The patent No. is that the patent of 200710107086.8 ' I. C. engine exhaust after-treatment device ' is that ' jar shape a mixed air vessel of porous has been installed in the upstream of catalytic reduction activity end, and mixed atmosphere reverse flow ' increase mixed effect, there is baroque problem in this patent.Analyze external catalytic reduction exemplar, find that the structure of its mixed cell has nothing in common with each other, but purpose is identical.
Summary of the invention:
The object of the present invention is to provide a kind of recombiner unit of automotive exhaust catalysis reduction preprocessor, it is that a kind of structure of the catalytic reduction preprocessor of using on commercial car is improved, the parameter of optimizing structure, improve the effect of urea mixed cell, increase ceramic coating, and the nano level TiO2 particle of the distribution of surface layer even compact, the urea decomposition function strengthened, and have noise reduction and certain heat insulation effect, have very high use value.
Technological scheme of the present invention is achieved in that a kind of recombiner unit of automotive exhaust catalysis reduction preprocessor, and it is characterized in that: recombiner unit is made up of adpting flange, suction tude, housing, mixed cell, catalyst carrier activity unit, steam outlet pipe, supporting clapboard, stiffening rib and pod apertures and ceramic coating; Adpting flange and the welding of suction tude argon arc, and integrally welded with the mixed cell of being furnished with pod apertures, and mixed cell adopts stiffening rib and housing welding to support; The catalyst carrier activity unit adopts supporting clapboard and housing welding to support; Steam outlet pipe is welded on the housing; On the inner and outer wall of mixed cell, be coated with ceramic coating, and the nano level TiO2 particle of the distribution of surface layer even compact; The catalytic reduction preprocessor is a square box, is coated with ceramic coating on the inboard of its inner chamber dividing plate and termination shrouding, and the nano level TiO2 particle of the distribution of surface layer even compact.
It is stainless steel that the entrance and exit end of described carrier activity unit has been set up circular shape urea mixed cell, is supported on the casing by the stiffening rib welding; Circular shape urea mixed cell is formed by the stainless-steel pipe coiling, and the diameter of pipe is equal to or less than the diameter of inlet tube, the uniform open pore of tube-surface, and the diameter 5～10mm of open pore, the summation of the area in hole is 1.1～1.2 times of inlet tube open area.
The termination of described housing is 2 layers of recombiner unit that corrosion resistant plate is welded to form, wherein, and the stainless steel position coated with ceramic coating of the contact carbamide reducing agent atmosphere of the end plate of internal layer, and the nano level TiO2 particle of the distribution of surface layer even compact;
The coated technique of described ceramic coating is as follows: the position of inner and outer wall of [1] circular shape mixed cell and the catalytic reduction inlet end of casing contact carbamide reducing agent atmosphere, handled 2～3 hours under the oxalic acid solution room temperature through 0.1～0.2%wt earlier; Tap water cleans 2 times, washed with de-ionized water 1 time; Under 85～105 ℃ of temperature, 0.5～1 hour, oven dry; Then the water glass of solid content 20～30%wt (Na2OnSiO2) is smeared or dip-coating on the stainless steel surfaces that will apply; Naturally place 5～20min under the room temperature, form half-dried undercoating, finish preceding processing and the preparation of ceramic layer coating; [2] the TiO2 powder of nano level Ca-Ti ore type dry 30～60min in 100～110 ℃ baking oven; Adopt industrial powder spraying spray gun, the TiO2 powder of the nano level Ca-Ti ore type after in the jar of spray gun, adding oven dry, regulate compressed-air actuated pressure between 0.05～0.2Mpa, making powder be mist evenly sprays, forming spraying continuously on the half-dried internally coated surface, cause and cover original half-dried undercoating surface fully; Transfer parts causes in the baking oven, keeps 30～40min under 65～85 ℃ temperature; Pressurized air purges the surface behind the coating TiO2 powder, removes unnecessary TiO2 powder, forms the fine and close relatively ceramic coating of one deck, and the nano level TiO2 particle of the distribution of surface layer even compact.
Good effect of the present invention is: according to simple structure, scientific principles, the most attainable mode, the principle of reliable structure, adopt the recombiner unit of this catalytic reduction preprocessor to realize the function of the mixing of urea atmosphere, decomposition, insulation, noise reduction, be of very high actual application value and realistic meanings.
Description of drawings:
Fig. 1 is a plan structure schematic representation of the present invention;
Fig. 2 is a structure principle chart of the present invention;
Embodiment:
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, 2, a kind of recombiner unit of automotive exhaust catalysis reduction preprocessor, it is characterized in that: recombiner unit is made up of adpting flange 1, suction tude 2, housing 3, mixed cell 4, catalyst carrier activity unit 5, steam outlet pipe 6, supporting clapboard 7, stiffening rib 8 and pod apertures 9 and ceramic coating 10; Adpting flange 1 and the welding of suction tude 2 argon arcs, and integrally welded with the mixed cell 4 of being furnished with pod apertures 9, and mixed cell 4 adopts stiffening rib 8 and housing 3 welding to support; Catalyst carrier activity unit 5 adopts supporting clapboard 7 and housing 3 welding to support; Steam outlet pipe 6 is welded on the housing 3; On the inner and outer wall of mixed cell 4, be coated with ceramic coating, and the nano level TiO2 particle of the distribution of surface layer even compact; The catalytic reduction preprocessor is a square box, is coated with ceramic coating on the inboard of its inner chamber dividing plate and termination shrouding, and the nano level TiO2 particle of the distribution of surface layer even compact.
The entrance and exit end of carrier activity unit 5 has been set up circular shape urea mixed cell 4 and has been stainless steel, is supported on the casing by stiffening rib 8 welding; Circular shape urea mixed cell 4 is formed by the stainless-steel pipe coiling, and the diameter of pipe is equal to or less than the diameter of inlet tube, the uniform open pore of tube-surface, and the diameter 5～10mm of open pore, the summation of the area in hole is 1.1～1.2 times of inlet tube open area.
The termination of housing 3 is 2 layers of recombiner unit that corrosion resistant plate is welded to form, wherein, and the stainless steel position coated with ceramic coating of the contact carbamide reducing agent atmosphere of the end plate of internal layer, and the nano level TiO2 particle of the distribution of surface layer even compact;
The coated technique of ceramic coating is as follows: the position of inner and outer wall of [1] circular shape mixed cell 4 and the catalytic reduction inlet end of casing contact carbamide reducing agent atmosphere, handled 2～3 hours under the oxalic acid solution room temperature through 0.1～0.2%wt earlier; Tap water cleans 2 times, washed with de-ionized water 1 time; Under 85～105 ℃ of temperature, 0.5～1 hour, oven dry; Then the water glass of solid content 20～30%wt (Na2OnSiO2) is smeared or dip-coating on the stainless steel surfaces that will apply; Naturally place 5～20min under the room temperature, form half-dried undercoating, finish preceding processing and the preparation of ceramic layer coating; [2] the TiO2 powder of nano level Ca-Ti ore type dry 30～60min in 100～110 ℃ baking oven; Adopt industrial powder spraying spray gun, the TiO2 powder of the nano level Ca-Ti ore type after in the jar of spray gun, adding oven dry, regulate compressed-air actuated pressure between 0.05～0.2Mpa, making powder be mist evenly sprays, forming spraying continuously on the half-dried internally coated surface, cause and cover original half-dried undercoating surface fully; Transfer parts causes in the baking oven, keeps 30～40min under 65～85 ℃ temperature; Pressurized air purges the surface behind the coating TiO2 powder, removes unnecessary TiO2 powder, forms the fine and close relatively ceramic coating of one deck, and the nano level TiO2 particle of the distribution of surface layer even compact.
Recombiner unit is the square box structure, and boundary dimension is 600 * 450 * 450mm, and fillet is excessive, according to the head plate of the cutting of size quality of fit and preparation intermediate support dividing plate and termination; Choose identically with the engine exhaust pipe diameter, for example, diameter is 4 at 45 ° of elbows of 90mm, and argon arc welding is connected into annulus, and perhaps circular shape urea mixed cell is formed by the coiling of comparable size stainless-steel pipe, and is welded into integral body with the inlet tube of outlet pipe; The diameter of pipe is 90mm, uniform 144 open pores of tube-surface, and the diameter 8mm in hole, the summation of the area in hole is 7234.56mm
2, and the orifice area that diameter is 90mm gets engine exhaust pipe is 6358.5mm
2, the two is divided by is 1.14 times, according to fluid mechanics principle, considers the wall effect in hole, can not cause gas-flow resistance herein;
The position of the catalytic reduction inlet end contact carbamide reducing agent atmosphere of the inner and outer wall of circular shape mixed cell 4 and casing is earlier through handling 3 hours under the oxalic acid solution room temperature of 0.2%wt; Tap water cleans 2 times, washed with de-ionized water 1 time; Under 100 ℃ of temperature, 0.5 hour, oven dry; Then the water glass of solid content 30%wt (Na2OnSiO2) is smeared or dip-coating on the stainless steel surfaces that will apply; Naturally place 20min under the room temperature, drench and do excess liquid, form half-dried undercoating, finish preceding processing and the preparation of ceramic layer coating;
Adpting flange 1, suction tude 20, housing 3, entrance and exit end circular shape mixed cell 4, four groups of catalyst carrier activity units 5, steam outlet pipe 6, supporting clapboard 7 and stiffening ribs 8 have been set up, and after the steps such as ceramic coating 10 of the nano level TiO2 particle of the distribution of finishing above-mentioned surface layer even compact, argon arc welding is connected into a kind of recombiner unit of automotive exhaust catalysis reduction preprocessor.
Recombiner unit with above-mentioned automotive exhaust catalysis reduction preprocessor, be connected to discharge capacity and be on the outlet pipe of state's 3 diesel engines of 8.6L, urea-spray and control unit are installed, connect discharging instrument and other controller, motor is turned round by the ESC operating mode, measuring N OX conversion ratio is stabilized in 87～93%, and with respect to the unit that does not adopt catalytic reduction preprocessor of the present invention, the NOX removal effect improves 1～4%.
With the recombiner unit of above-mentioned automotive exhaust catalysis reduction preprocessor, be connected to discharge capacity and be on the outlet pipe of state's 3 diesel-oil vehicles of 8.6L, measure by noise and static noise, with respect to former car baffler, the noise rank reduces 0.5dB.
Claims (4)
1. the recombiner unit of automotive exhaust catalysis reduction preprocessor, it is characterized in that: recombiner unit is made up of adpting flange (1), suction tude (2), housing (3), mixed cell (4), catalyst carrier activity unit (5), steam outlet pipe (6), supporting clapboard (7), stiffening rib (8) and pod apertures (9) and ceramic coating (10); Adpting flange (1) and the welding of suction tude (2) argon arc, and integrally welded with the mixed cell (4) of being furnished with pod apertures (9), and mixed cell (4) adopts stiffening rib (8) and housing (3) welding to support; Catalyst carrier activity unit (5) adopts supporting clapboard (7) and housing (3) welding to support; Steam outlet pipe (6) is welded on the housing (3); On the inner and outer wall of mixed cell (4), be coated with ceramic coating, and the nano level TiO2 particle of the distribution of surface layer even compact; The catalytic reduction preprocessor is a square box, is coated with ceramic coating on the inboard of its inner chamber dividing plate and termination shrouding, and the nano level TiO2 particle of the distribution of surface layer even compact.
2. the recombiner unit of a kind of automotive exhaust catalysis reduction preprocessor according to claim 1, it is stainless steel that the entrance and exit end that it is characterized in that described carrier activity unit (5) has been set up circular shape urea mixed cell (4), is supported on the casing by stiffening rib (8) welding; Circular shape urea mixed cell (4) is formed by the stainless-steel pipe coiling, and the diameter of pipe is equal to or less than the diameter of inlet tube, the uniform open pore of tube-surface, and the diameter 5～10mm of open pore, the summation of the area in hole is 1.1～1.2 times of inlet tube open area.
3. the recombiner unit of a kind of automotive exhaust catalysis reduction preprocessor according to claim 1, the termination that it is characterized in that described housing (3) is 2 layers of recombiner unit that corrosion resistant plate is welded to form, wherein, the stainless steel position coated with ceramic coating of the contact carbamide reducing agent atmosphere of the end plate of internal layer, and the nano level TiO2 particle of the distribution of surface layer even compact;
4. the recombiner unit of a kind of automotive exhaust catalysis reduction preprocessor according to claim 1, the coated technique that it is characterized in that described ceramic coating is as follows: the position of inner and outer wall of [1] circular shape mixed cell (4) and the catalytic reduction inlet end of casing contact carbamide reducing agent atmosphere, handled 2～3 hours under the oxalic acid solution room temperature through 0.1～0.2%wt earlier; Tap water cleans 2 times, washed with de-ionized water 1 time; Under 85～105 ℃ of temperature, 0.5～1 hour, oven dry; Then the water glass of solid content 20～30%wt (Na2OnSiO2) is smeared or dip-coating on the stainless steel surfaces that will apply; Naturally place 5～20min under the room temperature, form half-dried undercoating, finish preceding processing and the preparation of ceramic layer coating; [2] the TiO2 powder of nano level Ca-Ti ore type dry 30～60min in 100～110 ℃ baking oven; Adopt industrial powder spraying spray gun, the TiO2 powder of the nano level Ca-Ti ore type after in the jar of spray gun, adding oven dry, regulate compressed-air actuated pressure between 0.05～0.2Mpa, making powder be mist evenly sprays, forming spraying continuously on the half-dried internally coated surface, cause and cover original half-dried undercoating surface fully; Transfer parts causes in the baking oven, keeps 30～40min under 65～85 ℃ temperature; Pressurized air purges the surface behind the coating TiO2 powder, removes unnecessary TiO2 powder, forms the fine and close relatively ceramic coating of one deck, and the nano level TiO2 particle of the distribution of surface layer even compact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217707.7A CN102032030B (en) | 2009-09-25 | 2009-09-25 | Composite unit of automobile exhaust catalytic reduction postprocessor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910217707.7A CN102032030B (en) | 2009-09-25 | 2009-09-25 | Composite unit of automobile exhaust catalytic reduction postprocessor |
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| CN102032030A true CN102032030A (en) | 2011-04-27 |
| CN102032030B CN102032030B (en) | 2015-04-22 |
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| CN200910217707.7A Expired - Fee Related CN102032030B (en) | 2009-09-25 | 2009-09-25 | Composite unit of automobile exhaust catalytic reduction postprocessor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926848A (en) * | 2012-10-31 | 2013-02-13 | 常州市凯宇工具有限公司 | Exhaust pipe |
| CN104011340A (en) * | 2011-12-26 | 2014-08-27 | 双叶产业株式会社 | Exhaust processing device |
| EP2841726A1 (en) | 2012-04-24 | 2015-03-04 | Perkins Engines Company Limited | An inlet module for an emissions cleaning module |
| CN104755896A (en) * | 2012-06-29 | 2015-07-01 | 英瑞杰汽车系统研究公司 | Device for measuring the pressure of gas in pollution control or energy storage system |
| CN107702118A (en) * | 2017-10-08 | 2018-02-16 | 刘道灵 | A kind of vent gas treatment catalytic unit |
| CN108071453A (en) * | 2016-11-14 | 2018-05-25 | 埃贝斯佩歇排气技术有限责任两合公司 | Reactant discharges arrangement system |
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| EP0555746A1 (en) * | 1992-02-10 | 1993-08-18 | Man Nutzfahrzeuge Ag | Device for catalytic NOx reduction |
| CN1188428A (en) * | 1995-06-19 | 1998-07-22 | 日本曹达株式会社 | Photocatalyst-carrying structure and photocatalyst coating material |
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| JP2007239486A (en) * | 2006-03-06 | 2007-09-20 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device for internal combustion engine |
| CN101368500A (en) * | 2007-08-15 | 2009-02-18 | 株式会社久保田 | Exhaust device for a diesel engine |
| CN101395350A (en) * | 2006-01-27 | 2009-03-25 | 皮尔伯格有限责任公司 | Device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines |
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Patent Citations (6)
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| EP0555746A1 (en) * | 1992-02-10 | 1993-08-18 | Man Nutzfahrzeuge Ag | Device for catalytic NOx reduction |
| CN1188428A (en) * | 1995-06-19 | 1998-07-22 | 日本曹达株式会社 | Photocatalyst-carrying structure and photocatalyst coating material |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011340A (en) * | 2011-12-26 | 2014-08-27 | 双叶产业株式会社 | Exhaust processing device |
| CN104011340B (en) * | 2011-12-26 | 2016-09-14 | 双叶产业株式会社 | Exhaust gas treatment device |
| EP2841726A1 (en) | 2012-04-24 | 2015-03-04 | Perkins Engines Company Limited | An inlet module for an emissions cleaning module |
| CN104755896A (en) * | 2012-06-29 | 2015-07-01 | 英瑞杰汽车系统研究公司 | Device for measuring the pressure of gas in pollution control or energy storage system |
| CN102926848A (en) * | 2012-10-31 | 2013-02-13 | 常州市凯宇工具有限公司 | Exhaust pipe |
| CN102926848B (en) * | 2012-10-31 | 2016-01-13 | 常州市盛发灯泡厂 | Outlet pipe |
| CN108071453A (en) * | 2016-11-14 | 2018-05-25 | 埃贝斯佩歇排气技术有限责任两合公司 | Reactant discharges arrangement system |
| CN108071453B (en) * | 2016-11-14 | 2020-10-09 | 埃贝斯佩歇排气技术有限责任两合公司 | Reactant release arrangement |
| CN107702118A (en) * | 2017-10-08 | 2018-02-16 | 刘道灵 | A kind of vent gas treatment catalytic unit |
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|---|---|
| CN102032030B (en) | 2015-04-22 |
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