CN105587386A - Tightly-coupled selective catalytic reduction (SCR) aftertreatment packaging structure of light diesel vehicle - Google Patents
Tightly-coupled selective catalytic reduction (SCR) aftertreatment packaging structure of light diesel vehicle Download PDFInfo
- Publication number
- CN105587386A CN105587386A CN201510945924.3A CN201510945924A CN105587386A CN 105587386 A CN105587386 A CN 105587386A CN 201510945924 A CN201510945924 A CN 201510945924A CN 105587386 A CN105587386 A CN 105587386A
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- Prior art keywords
- baffle
- urea
- scr
- clam shell
- vertical plate
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention belongs to the technical field of automobile exhaust aftertreatment and relates to a tightly-coupled selective catalytic reduction (SCR) aftertreatment packaging structure of a light diesel vehicle. The tightly-coupled SCR aftertreatment packaging structure comprises a particulate trap and a diesel oil oxidation catalyst. The particulate trap is connected with the diesel oil oxidation catalyst through a lower clamshell-shaped shell; the upper end of the lower clamshell-shaped shell is connected with an upper clamshell-shaped shell in a tightly coupled mode to form an enclosed cavity; a flow guide plate is fixedly connected to the vertical folded surface of the lower clamshell-shaped shell and comprises a horizontal plate and a vertical plate which are connected into a whole; the vertical plate extends towards the inside of the enclosed cavity; a flow guide groove is formed in the root position of the horizontal plate; a second flow guide block is disposed at the outer end of the horizontal plate; a first flow guide block is mounted on the vertical plate; a urea spray nozzle is installed on the upper clamshell-shaped shell; and the center line of the urea spray nozzle and the second flow guide block intersect. By means of the structural design, full mixing of urea liquid drops with air flow can be facilitated, and the urea pyrolysis and hydrolysis environment temperature is guaranteed.
Description
Technical field
The invention belongs to vehicle exhaust post-processing technology field, relate to a kind of light-duty diesel vehicle close coupling type SCR post processing encapsulating structure.
Background technology
Along with the increasingly stringent of emission of diesel engine regulation, because of SCR(SCR) technology not only has the character lower to oil product requirement, there is the advantages such as higher fuel economy and higher NOx conversion ratio simultaneously, be acknowledged as mainstream technology in diesel engine post processing field. But traditional SCR catalyst converter is placed in urea nozzle on blast pipe by Connection Block, and space requirement is large. Difficult arrangement and urea droplets atomization space deficiency, cause urea droplets to be directly injected on blast pipe wall, easily produces urea crystals problem in the time that delivery temperature is lower on blast pipe wall.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of light-duty diesel vehicle close coupling type SCR post processing encapsulating structure is provided, this structural design can promote fully mixing of urea droplets and air-flow, ensures urea pyrolysis and hydrolysis environment temperature. Fogging degree and the distributing homogeneity of urea in raising, under underload, solved the restriction of traditional arrangement mode arrangement space and the low problem of conventional integrated form SCR catalyst converter NOx catalytic conversion efficiency.
According to technical scheme of the present invention: a kind of light-duty diesel vehicle close coupling type SCR post processing encapsulating structure, it is characterized in that: comprise grain catcher, diesel oil oxidation catalyst converter, described grain catcher, both are connected diesel oil oxidation catalyst converter by lower clam shell, lower clam shell upper end close-coupled connects upper clam shell, form airtight cavity, on the vertical folding face of lower clam shell, be fixedly connected with deflector, described deflector comprises the level board that one connects, vertical plate, vertical plate extends in airtight cavity, the root position of described level board is provided with guiding gutter, the outer end of level board is provided with the second baffle, vertical plate is provided with the first baffle, on upper clam shell, urea nozzle is installed, the center line of described urea nozzle is crossing with the second baffle.
As a further improvement on the present invention, described the second baffle extends towards vertical direction, and the first baffle extends towards horizontal direction, and described the first baffle, both structures of the second baffle are identical, and both vertical cross-sections are V-shaped shape all.
As a further improvement on the present invention, the described grain catcher outlet at bottom tube connector that is tightly connected, the exit of tube connector is fixed with selective catalytic reduction device.
Technique effect of the present invention is: traditional SCR catalyst converter is placed in urea nozzle on exhausting pipe of diesel oil vehicle by Connection Block. Due to the restriction of arrangement space in car load, design by traditional arrangement mode, difficult arrangement and urea droplets atomization space deficiency, cause urea droplets to be directly injected on blast pipe wall, easily produces urea crystals problem in the time that delivery temperature is lower on blast pipe wall. Close coupling type SCR catalytic converter not only can solve the problem that space is arranged, can also make overall structure simpler. This product has the following advantages: compact conformation, occupies little space; Urea pyrolysis, problem that hydrolysis environment temperature is on the low side are solved; The grain catcher of close coupling type structure SDPF(with SCR), SCR(SCR device) near entrance, temperature is higher, thereby raises the efficiency, and reduces urea crystals risk; Reasonably mixed structure, makes fully mixing of urea droplets and air-flow, from having realized higher NOx conversion ratio.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is stereogram of the present invention.
Fig. 3 is the structure chart of grain catcher and diesel oil oxidation catalyst converter in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
In Fig. 1 ~ 3, comprise clam shell 1, grain catcher 2, lower clam shell 3, the first baffle 4, the second baffle 5, urea nozzle 6, diesel oil oxidation catalyst converter 7, air inlet end cap 8, deflector 9, tube connector 10, selective catalytic reduction device 11, guiding gutter 12 etc.
As shown in Fig. 1 ~ 3, it in the present invention, is a kind of light-duty diesel vehicle close coupling type SCR post processing encapsulating structure, comprise grain catcher 2, diesel oil oxidation catalyst converter 7, described grain catcher 2, both are connected diesel oil oxidation catalyst converter 7 by lower clam shell 3, lower clam shell 3 upper end close-coupled connect upper clam shell 1, form airtight cavity, on the vertical folding face of lower clam shell 3, be fixedly connected with deflector 9, described deflector 9 comprises the level board 9-1 that one connects, vertical plate 9-2, vertical plate 9-2 extends in airtight cavity, the root position of described level board 9-1 is provided with guiding gutter 12, the outer end of level board 9-1 is provided with the second baffle 5, vertical plate 9-2 is provided with the first baffle 4, on upper clam shell 1, urea nozzle 6 is installed, the center line of described urea nozzle 6 is crossing with the second baffle 5, make the aqueous solution of urea fragmentation spraying into. in the time of work, another effect that deflector 9 plays is the rear end face that placement aqueous solution of urea is directly injected to diesel oil oxidation catalyst converter 7 carriers, causes diesel oil oxidation catalyst converter 7 to stop up, vertical plate 9-2 design comparison is long, and its effect is the distance of mixing that increases air-flow and aqueous solution of urea, makes both mixing more abundant.
The second baffle 5 extends towards vertical direction, and the first baffle 4 extends towards horizontal direction, and described the first baffle 4, second baffle 5 both structures are identical, and both vertical cross-sections are V-shaped shape all.
The grain catcher 2 outlet at bottoms tube connector 10 that is tightly connected, the exit of tube connector 10 is fixed with selective catalytic reduction device 11.
Urea nozzle 6 in the present invention is arranged in the airtight cavity being formed by diesel oil oxidation catalyst converter 7 rear ends and grain catcher 2 front ends with SCR, reasonably airtight cavity design, make fully mixing of urea droplets and air-flow, and fully pyrolysis hydrolysis, thereby realize higher NOx catalytic conversion efficiency.
As shown in Figure 3, diesel oil oxidation catalyst converter 7 lower ends are fixed with air inlet end cap 8, and off-gas flows, by entrance inlet chamber, directly enters in diesel oil oxidation catalyst converter 7, air inlet and diesel oil oxidation catalyst converter 7 carrier front end face distances are shorter in theory, and its velocity uniformity is had to adverse influence. But because deflector 9 is arranged on diesel oil oxidation catalyst converter 7 carrier rear end faces, played the effect of barrier air, therefore mainstream speed slows down, and air-flow fully mixes at inlet chamber, thereby ensure that diesel oil oxidation catalyst converter 7 front ends have good velocity uniformity.
Generally, air-flow should directly be flowed out by diesel oil oxidation catalyst converter 7 rear end faces after the inner rectified action of diesel oil oxidation catalyst converter 7, but in this product, add deflector 9, due to the barrier effect of deflector 9, one end that air-flow is mainly blocked by the not diversed plate 9 in diesel oil oxidation catalyst converter 7 rear ends and the position of guiding gutter 12 accelerate to flow out, the vertical plate 9-2 of deflector 9 and the first baffle 4 all play the effect of mixed airflow in this process, be conducive to dispel the aqueous solution of urea spraying in blender, thereby accelerate breaking of aqueous solution of urea, make it more abundant with mixing of waste gas.
Enter and treat SCR grain catcher 2 through well-mixed waste gas, due to closely-coupled design, hot environment not only makes catalytic conversion efficiency greatly improve, and can solve the urea crystals problem that low temperature produces.
Adopt technical scheme of the present invention, not only solve the problem that product kind urea pyrolysis hydrolysis environment temperature is on the low side, waste gas heat insulation effect is bad, also improve by rational mixed structure the uniformity that the air-flow of carrier inside in product mixes with urea droplets, thereby improved the NOx catalytic conversion efficiency of whole system.
Claims (3)
1. a light-duty diesel vehicle close coupling type SCR post processing encapsulating structure, it is characterized in that: comprise grain catcher (2), diesel oil oxidation catalyst converter (7), described grain catcher (2), both are connected diesel oil oxidation catalyst converter (7) by lower clam shell (3), lower clam shell (3) upper end close-coupled connects upper clam shell (1), form airtight cavity, on the vertical folding face of lower clam shell (3), be fixedly connected with deflector (9), described deflector (9) comprises the level board (9-1) that one connects, vertical plate (9-2), vertical plate (9-2) extends in airtight cavity, the root position of described level board (9-1) is provided with guiding gutter (12), the outer end of level board (9-1) is provided with the second baffle (5), vertical plate (9-2) is provided with the first baffle (4), urea nozzle (6) is installed on upper clam shell (1), the center line of described urea nozzle (6) is crossing with the second baffle (5).
2. light-duty diesel vehicle close coupling type SCR post processing encapsulating structure as claimed in claim 1, it is characterized in that: described the second baffle (5) extends towards vertical direction, the first baffle (4) extends towards horizontal direction, described the first baffle (4), both structures of the second baffle (5) are identical, and both vertical cross-sections are V-shaped shape all.
3. light-duty diesel vehicle close coupling type SCR post processing encapsulating structure as claimed in claim 1, it is characterized in that: described grain catcher (2) the outlet at bottom tube connector (10) that is tightly connected, the exit of tube connector (10) is fixed with selective catalytic reduction device (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945924.3A CN105587386B (en) | 2015-12-17 | 2015-12-17 | Light-duty diesel vehicle close coupling type SCR post-processes encapsulating structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945924.3A CN105587386B (en) | 2015-12-17 | 2015-12-17 | Light-duty diesel vehicle close coupling type SCR post-processes encapsulating structure |
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| Publication Number | Publication Date |
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| CN105587386A true CN105587386A (en) | 2016-05-18 |
| CN105587386B CN105587386B (en) | 2018-03-23 |
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| CN201510945924.3A Active CN105587386B (en) | 2015-12-17 | 2015-12-17 | Light-duty diesel vehicle close coupling type SCR post-processes encapsulating structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018115616A (en) * | 2017-01-19 | 2018-07-26 | 東京濾器株式会社 | Swirl flow generating device |
| WO2020165121A1 (en) * | 2019-02-11 | 2020-08-20 | Cnh Industrial Italia S.P.A. | Improved after treatment system for a vehicle |
| CN113550814A (en) * | 2021-09-08 | 2021-10-26 | 无锡威孚力达催化净化器有限责任公司 | Whistle type urea mixing device and post-treatment system |
| US11560831B2 (en) | 2018-02-28 | 2023-01-24 | Tenneco Gmbh | Low-pressure EGR system with turbo bypass |
Citations (5)
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| JP2005155404A (en) * | 2003-11-25 | 2005-06-16 | Komatsu Ltd | Exhaust emission control device for internal combustion engine |
| FR3010134A1 (en) * | 2013-09-04 | 2015-03-06 | Faurecia Sys Echappement | IMPROVED DEVICE FOR PURIFYING EXHAUST GAS OF INTERNAL COMBUSTION ENGINE |
| CN104755716A (en) * | 2012-10-26 | 2015-07-01 | 戴姆勒股份公司 | Device for storing and delivering a liquid additive, in particular for catalytic exhaust gas nox removal in a motor vehicle |
| DE202015102092U1 (en) * | 2014-05-07 | 2015-08-11 | Faurecia Systemes D'echappement | emission control assembly |
| JP2015218615A (en) * | 2014-05-15 | 2015-12-07 | 株式会社ユタカ技研 | Exhaust emission purifying device |
-
2015
- 2015-12-17 CN CN201510945924.3A patent/CN105587386B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005155404A (en) * | 2003-11-25 | 2005-06-16 | Komatsu Ltd | Exhaust emission control device for internal combustion engine |
| CN104755716A (en) * | 2012-10-26 | 2015-07-01 | 戴姆勒股份公司 | Device for storing and delivering a liquid additive, in particular for catalytic exhaust gas nox removal in a motor vehicle |
| FR3010134A1 (en) * | 2013-09-04 | 2015-03-06 | Faurecia Sys Echappement | IMPROVED DEVICE FOR PURIFYING EXHAUST GAS OF INTERNAL COMBUSTION ENGINE |
| DE202015102092U1 (en) * | 2014-05-07 | 2015-08-11 | Faurecia Systemes D'echappement | emission control assembly |
| JP2015218615A (en) * | 2014-05-15 | 2015-12-07 | 株式会社ユタカ技研 | Exhaust emission purifying device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018115616A (en) * | 2017-01-19 | 2018-07-26 | 東京濾器株式会社 | Swirl flow generating device |
| US11560831B2 (en) | 2018-02-28 | 2023-01-24 | Tenneco Gmbh | Low-pressure EGR system with turbo bypass |
| WO2020165121A1 (en) * | 2019-02-11 | 2020-08-20 | Cnh Industrial Italia S.P.A. | Improved after treatment system for a vehicle |
| US11506101B2 (en) | 2019-02-11 | 2022-11-22 | Cnh Industrial America Llc | After treatment system for a vehicle |
| CN113550814A (en) * | 2021-09-08 | 2021-10-26 | 无锡威孚力达催化净化器有限责任公司 | Whistle type urea mixing device and post-treatment system |
| CN113550814B (en) * | 2021-09-08 | 2022-06-21 | 无锡威孚力达催化净化器有限责任公司 | Whistle type urea mixing device and post-treatment system |
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| Publication number | Publication date |
|---|---|
| CN105587386B (en) | 2018-03-23 |
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