CN214304012U - Exhaust gas aftertreatment device for diesel engine and vehicle - Google Patents
Exhaust gas aftertreatment device for diesel engine and vehicle Download PDFInfo
- Publication number
- CN214304012U CN214304012U CN202120364908.6U CN202120364908U CN214304012U CN 214304012 U CN214304012 U CN 214304012U CN 202120364908 U CN202120364908 U CN 202120364908U CN 214304012 U CN214304012 U CN 214304012U
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- CN
- China
- Prior art keywords
- exhaust gas
- gas aftertreatment
- mixer
- oxidation catalyst
- aftertreatment system
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- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 230000003647 oxidation Effects 0.000 claims abstract description 43
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 43
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- 230000003197 catalytic effect Effects 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 239000013618 particulate matter Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 68
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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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
-
- 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
Abstract
The utility model provides a tail gas aftertreatment device and vehicle for diesel engine. The exhaust gas aftertreatment device comprises: the first tail gas aftertreatment system comprises a first oxidation catalyst, a first mixer communicated with the first oxidation catalyst and provided with a first ammonia water injection device, and a first selective catalytic reduction device communicated with the first mixer; the second tail gas after-treatment system comprises a second oxidation catalyst, a second mixer which is communicated with the second oxidation catalyst and is provided with a second ammonia water injection device, and a second selective catalytic reduction device which is communicated with the second mixer; and a connecting pipe connecting the first selective catalytic reducer and the second oxidation catalyst; wherein at least one of the first exhaust gas aftertreatment system and the second exhaust gas aftertreatment system is arranged in a U-shape. According to the utility model discloses a tail gas aftertreatment device length can reduce remarkably, easily installs on vehicle chassis.
Description
Technical Field
The utility model relates to a diesel engine's tail gas treatment especially relates to a vehicle that is used for diesel engine's tail gas aftertreatment device and includes this kind of tail gas aftertreatment device.
Background
In vehicles using diesel engines, exhaust after-treatment systems are typically provided to reduce the content of nitrogen oxides, particulate matter, and under-burned hydrocarbons in the exhaust emissions. Exhaust aftertreatment systems typically include an oxidation catalyst for oxidizing insufficiently combusted hydrocarbons from the engine, a filter for filtering solid particulate matter, and a selective catalytic reducer for reducing nitrogen oxides to nitrogen with ammonia.
With the increasing importance on environmental protection, the emission requirements of engine exhaust, especially nitrogen oxides, are more and more demanding. Although the conversion of nitrogen oxides to nitrogen has reached almost 95% or more in existing exhaust aftertreatment systems, the legislative goal of the next generation of diesel engine exhaust emission standards is that the nitrogen oxide emissions are close to zero. In order to meet the emission targets of nitrogen oxides close to zero, many solutions have been proposed, among which one is to use an exhaust gas aftertreatment device with two stages of exhaust gas aftertreatment systems connected together in series. However, the two-stage exhaust aftertreatment system is significantly increased in length relative to the previous one-stage exhaust aftertreatment system, and the space in the longitudinal direction of the chassis of a vehicle using a diesel engine is generally limited, which makes installation of the two-stage exhaust aftertreatment system difficult.
Accordingly, there is a need for improvements in existing exhaust after-treatment devices for diesel engines.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect among the above-mentioned prior art, provide a tail gas after treatment device for diesel engine, this kind of tail gas after treatment device's length can reduce remarkably to be convenient for install on vehicle chassis.
According to an aspect of the utility model, a tail gas aftertreatment device for diesel engine is provided, include:
a first exhaust aftertreatment system including a first oxidation catalyst having an exhaust gas inlet, a first mixer downstream of and in communication with the first oxidation catalyst and having a first ammonia injection device disposed thereon, and a first selective catalytic reducer downstream of and in communication with the first mixer;
a second exhaust aftertreatment system including a second oxidation catalyst, a second mixer downstream of and in communication with the second oxidation catalyst and having a second ammonia injection device disposed thereon, and a second selective catalytic reducer downstream of and in communication with the second mixer and having an exhaust outlet; and
a connecting pipe for connecting an outlet of the first selective catalytic reduction device with an inlet of the second oxidation catalyst;
characterized in that at least one of the first exhaust gas aftertreatment system and the second exhaust gas aftertreatment system is arranged in a U-shape.
Preferably, the first exhaust gas aftertreatment system and the second exhaust gas aftertreatment system are both arranged in a U-shape.
Preferably, the first exhaust gas aftertreatment system and the second exhaust gas aftertreatment system are arranged vertically or horizontally in parallel.
Preferably, the first mixer and the first selective catalytic reducer are arranged in linear alignment, and the first oxidation catalyst is connected with the first mixer through a first connection portion so that the first exhaust aftertreatment system is in a U-shape.
Preferably, the second oxidation catalyst and the second mixer are arranged in linear alignment, and the second selective catalytic reducer is connected to the second mixer through a second connection portion so that the second exhaust aftertreatment system has a U-shape.
Preferably, the exhaust gas after-treatment device for a diesel engine further includes a filter provided on at least one of the first exhaust gas after-treatment system and the second exhaust gas after-treatment system for filtering solid particulate matter.
Preferably, the exhaust gas after-treatment device for a diesel engine further includes a filter disposed between the second oxidation catalyst and the second mixer for filtering solid particulate matter.
Preferably, the exhaust gas after-treatment device for a diesel engine further includes an auxiliary fuel injection device provided on the connection pipe for injecting diesel fuel into the exhaust gas after-treatment device.
According to another aspect of the present invention, there is provided a vehicle, characterized in that the vehicle includes the exhaust gas after-treatment device for a diesel engine as described above.
According to the utility model discloses a tail gas aftertreatment device for diesel engine because at least one among first tail gas aftertreatment system and the second tail gas aftertreatment system is U-shaped shape roughly, for being sharp linear shape tail gas aftertreatment system, the length that is the tail gas aftertreatment system of U-shaped roughly can reduce remarkably for the two-stage tail gas aftertreatment device who is tail gas aftertreatment system easily installs on the vehicle chassis that the space on vertical side received the restriction.
Drawings
Fig. 1 shows schematically in a perspective view an exhaust gas aftertreatment device for a diesel engine according to the invention; and
fig. 2 is a front view of the exhaust gas after-treatment device for a diesel engine shown in fig. 1.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 schematically shows an exhaust gas aftertreatment device for a diesel engine according to the invention in a perspective view, and fig. 2 is a front view of the exhaust gas aftertreatment device for a diesel engine shown in fig. 1. As shown in fig. 1 and 2, an exhaust gas aftertreatment device 1 for a diesel engine according to the present invention includes a first exhaust gas aftertreatment system 3 and a second exhaust gas aftertreatment system 5. The first exhaust gas aftertreatment system 3 comprises a first oxidation catalyst 9 having an exhaust gas inlet 7, a first mixer 13 located downstream of the first oxidation catalyst 9 and in downstream communication with the first oxidation catalyst 9 and provided with a first ammonia injection device 11 thereon, and a first selective catalytic reducer 15 located downstream of the first mixer 13 and in communication with the first mixer 13. The first oxidation catalyst 9 contains an oxidation catalyst for oxidizing insufficiently combusted hydrocarbons in the exhaust gas entering from the exhaust gas inlet 7. The first ammonia injection device 11 arranged on the first mixer 13 injects ammonia into the first mixer 13, the tail gas flowing through the first oxidation catalyst 9 is fully mixed with the ammonia injected by the first ammonia injection device 11 in the first mixer 13, and then flows through the first selective catalytic reducer 15 to perform catalytic reduction reaction, so that nitrogen oxides are reduced into nitrogen. In a preferred embodiment, the first mixer 13 and the first selective catalytic reducer 15 are arranged substantially linearly aligned, while the first oxidation catalyst 9 is connected to the first mixer 13 by a first connection 17 and makes the entire first exhaust aftertreatment system 3 substantially U-shaped. It will be appreciated that in a substantially U-shaped first exhaust gas aftertreatment system 3, the first mixer 13 on which the first ammonia injection device 11 is arranged may also be arranged substantially linearly aligned with the first oxidation catalyst 9, in which case the first mixer 13 is connected to the first selective catalytic reducer 15 by a first connection 17 and makes the entire first exhaust gas aftertreatment system 3 substantially U-shaped.
The second exhaust gas aftertreatment system 5 includes a second oxidation catalyst 19, a filter 21 located downstream of the second oxidation catalyst 19 and communicating with the second oxidation catalyst 19 for filtering solid particulate matter, a second mixer 25 located downstream of the filter 21 and communicating with the filter 21 and having a second ammonia water injection device 23 disposed thereon, and a second selective catalytic reducer 27 located downstream of the second mixer 25 and communicating with the second mixer 25 and having an exhaust gas outlet 26. The outlet of the first selective catalytic reduction device 15 is connected to the inlet of the second oxidation catalyst 19 via a connection pipe 29 so as to communicate the first exhaust gas aftertreatment system 3 and the second exhaust gas aftertreatment system 5. The second oxidation catalyst 19 contains an oxidation catalyst for oxidizing insufficiently combusted hydrocarbons in the exhaust gas entering from the first exhaust gas aftertreatment system 3. The filter 21 filters particulate matter in the gas flow from the second oxidation catalyst 19. The second ammonia water injection device 23 provided on the second mixer 25 injects ammonia water into the second mixer 25, and the exhaust gas passing through the filter 21 is sufficiently mixed with the ammonia water injected by the second ammonia water injection device 23 in the second mixer 25, and then passes through the second selective catalytic reducer 27 to undergo catalytic reduction reaction, so that nitrogen oxides are reduced to nitrogen. In the preferred embodiment, the second oxidation catalyst 19, the filter 21 and the second mixer 25 are arranged substantially linearly aligned, while the second selective catalytic reducer 27 is connected to the second mixer 25 by a second connection 31 and makes the entire second exhaust aftertreatment system 5 substantially U-shaped. It is to be understood that in the substantially U-shaped second exhaust gas aftertreatment system 5, the second mixer 25 on which the second ammonia water injection device 23 is arranged may also be arranged substantially linearly in line with the second selective catalytic reducer 27, in which case the second mixer 25 is connected to the filter 21 by a second connection 31 and makes the entire second exhaust gas aftertreatment system 5 substantially U-shaped. Of course, the filter 21, the second mixer 25, and the second selective catalyst reducer 27 may also be disposed in substantially linear alignment. Although in the preferred embodiment the filter 21 is arranged in the second exhaust gas aftertreatment system 5, it should be understood that the filter 21 may also be arranged in the first exhaust gas aftertreatment system 3, for example between the first oxidation catalyst 9 and the first mixer 13. Furthermore, a further filter 21 may also be provided between the first oxidation catalyst 9 and the first mixer 13 of the first exhaust gas aftertreatment system 3, while retaining the filter 21 in the second exhaust gas aftertreatment system 5. Optionally, an auxiliary fuel injection device 33 may be provided on the connection line 29 between the first exhaust gas aftertreatment system 3 and the second exhaust gas aftertreatment system 5 for injecting diesel fuel into the exhaust gas aftertreatment device 1, which is oxidized at the second oxidation catalyst 19 to release heat and burn off particles on the filter 21 in order to regenerate the filter 21.
The first and second exhaust aftertreatment systems 3, 5, each having a generally U-shape, may be arranged generally vertically in parallel as shown, or may be arranged generally horizontally in parallel. In the preferred embodiment described above, the first and second exhaust aftertreatment systems 3, 5 are each generally U-shaped, but it should be understood that it is also possible for one of the first and second exhaust aftertreatment systems 3, 5 to be generally U-shaped.
According to the utility model discloses a tail gas aftertreatment device for diesel engine because at least one in first tail gas aftertreatment system and the second tail gas aftertreatment system 5 is U-shaped shape roughly, for being sharp linear tail gas aftertreatment system, the length that is the tail gas aftertreatment system of U-shaped roughly can show and reduce for be, make two-stage tail gas aftertreatment device including tail gas aftertreatment system easily install on the vehicle chassis that the space on vertical side received the restriction.
While the invention has been described in detail in connection with the preferred embodiments thereof, it is to be understood that such detail is solely for that purpose and that no limitation of the invention is thereby intended. The scope of the present invention is defined by the claims.
Claims (9)
1. An exhaust gas aftertreatment device (1) for a diesel engine, comprising:
a first exhaust gas aftertreatment system (3), the first exhaust gas aftertreatment system (3) comprising a first oxidation catalyst (9) having an exhaust gas inlet (7), a first mixer (13) located downstream of the first oxidation catalyst (9) and in communication with the first oxidation catalyst (9) and having a first ammonia injection device (11) disposed thereon, and a first selective catalytic reduction device (15) located downstream of the first mixer (13) and in communication with the first mixer (13);
a second exhaust gas aftertreatment system (5), the second exhaust gas aftertreatment system (5) comprising a second oxidation catalyst (19), a second mixer (25) located downstream of the second oxidation catalyst (19) and in communication with the second oxidation catalyst (19) and provided with a second ammonia injection device (23) thereon, and a second selective catalytic reducer (27) located downstream of the second mixer (25) and in communication with the second mixer (25) and having an exhaust gas outlet; and
a connecting pipe (29) for connecting an outlet of the first selective catalytic reduction device (15) with an inlet of the second oxidation catalyst (19);
characterized in that at least one of the first exhaust gas aftertreatment system (3) and the second exhaust gas aftertreatment system (5) is arranged in a U-shape.
2. The exhaust gas aftertreatment device (1) for a diesel engine according to claim 1, characterized in that the first exhaust gas aftertreatment system (3) and the second exhaust gas aftertreatment system (5) are both arranged in a U-shape.
3. The exhaust aftertreatment device (1) for a diesel engine according to claim 2, characterized in that the first exhaust aftertreatment system (3) and the second exhaust aftertreatment system (5) are arranged vertically or horizontally in parallel.
4. The exhaust aftertreatment device (1) for a diesel engine according to claim 1 or 2, characterized in that the first mixer (13) and the first selective catalytic reducer (15) are arranged in linear alignment, the first oxidation catalyst (9) being connected to the first mixer (13) by a first connection (17) such that the first exhaust aftertreatment system (3) is U-shaped.
5. The exhaust gas aftertreatment device (1) for a diesel engine according to claim 1 or 2, characterized in that the second oxidation catalyst (19) and the second mixer (25) are arranged in linear alignment, the second selective catalytic reducer (27) being connected to the second mixer (25) by a second connection (31) such that the second exhaust gas aftertreatment system (5) is U-shaped.
6. The exhaust gas aftertreatment device (1) for a diesel engine according to claim 1 or 2, characterized by further comprising a filter (21) arranged on at least one of the first exhaust gas aftertreatment system (3) and the second exhaust gas aftertreatment system (5) for filtering solid particles.
7. The exhaust gas aftertreatment device (1) for a diesel engine according to claim 1 or 2, characterized by further comprising a filter (21) arranged between the second oxidation catalyst (19) and the second mixer (25) for filtering solid particulate matter.
8. The exhaust gas aftertreatment device (1) for a diesel engine according to claim 1 or 2, characterized by further comprising an auxiliary fuel injection device (33) arranged on the connecting pipe (29) for injecting diesel fuel into the exhaust gas aftertreatment device (1).
9. A vehicle, characterized in that it comprises an exhaust gas aftertreatment device (1) for a diesel engine according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364908.6U CN214304012U (en) | 2021-02-09 | 2021-02-09 | Exhaust gas aftertreatment device for diesel engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364908.6U CN214304012U (en) | 2021-02-09 | 2021-02-09 | Exhaust gas aftertreatment device for diesel engine and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214304012U true CN214304012U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120364908.6U Active CN214304012U (en) | 2021-02-09 | 2021-02-09 | Exhaust gas aftertreatment device for diesel engine and vehicle |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306520A (en) * | 2021-05-06 | 2022-11-08 | 普瑞姆有限公司 | Exhaust treatment module |
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2021
- 2021-02-09 CN CN202120364908.6U patent/CN214304012U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306520A (en) * | 2021-05-06 | 2022-11-08 | 普瑞姆有限公司 | Exhaust treatment module |
| DE102021111759A1 (en) | 2021-05-06 | 2022-11-10 | Purem GmbH | exhaust treatment module |
| US11680508B2 (en) | 2021-05-06 | 2023-06-20 | Purem GmbH | Exhaust-gas treatment module |
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