CN113431666A - Mixing chamber subassembly and tail gas aftertreatment encapsulation - Google Patents
Mixing chamber subassembly and tail gas aftertreatment encapsulation Download PDFInfo
- Publication number
- CN113431666A CN113431666A CN202110936308.7A CN202110936308A CN113431666A CN 113431666 A CN113431666 A CN 113431666A CN 202110936308 A CN202110936308 A CN 202110936308A CN 113431666 A CN113431666 A CN 113431666A
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- Prior art keywords
- fins
- cavity
- assembly
- mixing chamber
- mixing
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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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- 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]
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- 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
- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
Abstract
A mixing chamber assembly includes a mixing chamber housing and a mixing tube assembly. The mixing chamber housing is provided with a first opening for communicating with a first aftertreatment carrier assembly and a second opening for communicating with a second aftertreatment carrier assembly. The mixing chamber assembly also includes a spoiler mounted in the second opening. The spoiler comprises a plurality of first fins positioned on the inner ring, a plurality of second fins positioned on the outer ring, a plurality of first slots corresponding to the first fins one by one and a plurality of second slots corresponding to the second fins one by one, wherein the inclination directions of the first fins and the second fins are opposite. By the arrangement, the air flows guided by the first fins and the second fins can collide with each other, so that the uniformity of air flow distribution is improved. The invention also relates to an exhaust aftertreatment package comprising the mixing chamber assembly.
Description
Technical Field
The invention relates to a mixing cavity assembly and an exhaust aftertreatment package, and belongs to the technical field of engine exhaust aftertreatment.
Background
Studies have shown that the degree of uniformity of ammonia distribution in the lines of an exhaust aftertreatment system (e.g., a selective catalytic reduction system, SCR system) has a significant impact on the overall performance and durability of the system. The uneven distribution of ammonia over time can result in uneven catalyst aging, thereby affecting the overall performance of the catalyst. How to improve the uniformity of the distribution of the gas flow on the end surface of the carrier is a technical problem for those skilled in the art.
Disclosure of Invention
The invention aims to provide a mixing cavity assembly with good airflow distribution uniformity and tail gas aftertreatment packaging.
In order to achieve the purpose, the invention adopts the following technical scheme: a mixing cavity assembly comprises a mixing cavity shell and a mixing tube assembly arranged in the mixing cavity shell, wherein the mixing cavity shell is provided with a first opening communicated with a first post-processing carrier assembly, a second opening communicated with a second post-processing carrier assembly, a first cavity communicated with the first opening and a second cavity communicated with the second opening; the mixing tube assembly comprises a swirl tube located in the first cavity and a connecting tube located in the second cavity; the cyclone tube is provided with a first inner cavity, a plurality of cyclone plates and an airflow inlet corresponding to the cyclone plates, the first inner cavity is communicated with the first cavity through the airflow inlet, the connecting tube is provided with a second inner cavity communicated with the first inner cavity, and the second inner cavity is communicated with the second cavity; the mixing cavity assembly further comprises a spoiler installed in the second opening, the spoiler comprises a plurality of first fins located on the inner ring, a plurality of second fins located on the outer ring, a plurality of first slots corresponding to the first fins in a one-to-one mode, and a plurality of second slots corresponding to the second fins in a one-to-one mode, and the inclination directions of the first fins and the second fins are opposite.
As a further improved technical scheme of the invention, the plurality of first fins are inclined along the anticlockwise direction, and the plurality of second fins are inclined along the clockwise direction.
As a further improved technical scheme of the invention, the plurality of first fins are inclined along the clockwise direction, and the plurality of second fins are inclined along the anticlockwise direction.
As a further improved aspect of the present invention, the plurality of first fins and the plurality of second fins are formed by punching the spoiler.
As a further improved technical solution of the present invention, the mixing tube assembly further includes an arc-shaped plate located in the first cavity and partially surrounding the cyclone plate, so that the tail gas can enter the cyclone tube from the airflow inlet only by bypassing the arc-shaped plate.
As a further improved technical scheme of the invention, the cross section of the arc-shaped plate is C-shaped.
As a further improved technical scheme of the invention, the mixing cavity shell is provided with a mounting seat for mounting a urea nozzle, and the urea nozzle is used for spraying atomized urea liquid drops into the cyclone tube.
The invention also discloses an exhaust aftertreatment package which comprises a first aftertreatment carrier component, a second aftertreatment carrier component, a third aftertreatment carrier component positioned at the upstream of the first aftertreatment carrier component and a mixing cavity component for connecting the first aftertreatment carrier component and the second aftertreatment carrier component, wherein the first aftertreatment carrier component is a diesel particle trap, the second aftertreatment carrier component is a selective catalytic reducing agent, the third aftertreatment carrier component is a diesel oxidation catalyst, and the mixing cavity component is the mixing cavity component.
As a further improvement of the present invention, the spoiler is located at an inlet side of the second aftertreatment carrier assembly.
Compared with the prior art, the spoiler is arranged, and the inclination directions of the first fin and the second fin are opposite, so that the air flows guided by the first fin and the second fin can collide with each other, and the uniformity of air flow distribution is improved.
Drawings
FIG. 1 is a schematic view of an exhaust aftertreatment package of the present invention.
FIG. 2 is a perspective view of a mixing chamber assembly of the present invention in one embodiment.
Fig. 3 is a front view of fig. 2.
Fig. 4 is an exploded perspective view of fig. 2.
Fig. 5 is a perspective view of the spoiler in fig. 4.
Detailed Description
The following detailed description of the embodiments of the invention will be described in conjunction with the accompanying drawings, in which, if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The statements made in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. It should be understood that the use of terms such as "first," "second," and the like, in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another.
Referring to fig. 1, the present invention discloses an exhaust gas aftertreatment package, which includes a first aftertreatment carrier assembly 1, a second aftertreatment carrier assembly 2, a third aftertreatment carrier assembly 3 located upstream of the first aftertreatment carrier assembly 1, and a mixing chamber assembly 4 connecting the first aftertreatment carrier assembly 1 and the second aftertreatment carrier assembly 2. In one embodiment of the invention, the first aftertreatment carrier component 1 is a diesel particulate trap (DPF), the second aftertreatment carrier component 2 is a Selective Catalytic Reduction (SCR) and the third aftertreatment carrier component 3 is a Diesel Oxidation Catalyst (DOC).
The mixing chamber assembly 4 includes a mixing chamber housing 5 and a mixing tube assembly 6 mounted within the mixing chamber housing 5. The mixing chamber housing 5 is provided with a first opening 51 for communicating with a first aftertreatment carrier assembly 1, a second opening 52 for communicating with a second aftertreatment carrier assembly 2, a first cavity 53 communicating with the first opening 51, a second cavity 54 communicating with the second opening 52, and a partition 55 between the first cavity 53 and the second cavity 54.
The mixing tube assembly 6 includes a swirl tube 61 located in the first chamber 53, a connecting tube 62 located in the second chamber 54, and an arcuate plate 63 located within the first chamber 53 and partially surrounding the swirl tube 61.
The cyclone tube 61 is provided with a first inner cavity 611, a plurality of cyclones 612 and an air inlet 613 corresponding to the cyclones 612. The first inner cavity 611 communicates with the first cavity 53 through the gas flow inlet 613. The connecting pipe 62 is provided with a second inner cavity 621 communicated with the first inner cavity 611, and the second inner cavity 621 is communicated with the second cavity 54. The wall of the connecting pipe is provided with a plurality of air flow perforations 622. The curved plate 63 partially surrounds the swirl plate 612, so that the exhaust gas from the first opening 51 can pass through the curved plate 63 to enter the swirl tube 61 from the gas inlet 613. In the illustrated embodiment of the invention, the arcuate plate 63 is C-shaped in cross-section. The center pin of arc 63 with the center pin of whirl pipe 61 is parallel, mixing chamber subassembly 4 is including being located arc 63 with the arc air current passageway between the whirl pipe 61.
The mixing chamber shell 5 is provided with a mounting seat 531 for mounting a urea nozzle 7, and the urea nozzle 7 is used for spraying atomized urea liquid drops into the cyclone tube 61.
The mixing chamber assembly 4 further comprises a spoiler 8 mounted in the second opening 52. The spoiler 8 includes a plurality of first fins 81 located at an inner ring, a plurality of second fins 82 located at an outer ring, a plurality of first slots 83 corresponding to the plurality of first fins 81 one to one, and a plurality of second slots 84 corresponding to the plurality of second fins 82 one to one, wherein the inclination directions of the plurality of first fins 81 and the plurality of second fins 82 are opposite. In the illustrated embodiment of the present invention, the plurality of first fins 81 are inclined in a counterclockwise direction, and the plurality of second fins 82 are inclined in a clockwise direction. Of course, those skilled in the art will appreciate that the plurality of first fins 81 may also be inclined in a clockwise direction and the plurality of second fins 82 may be inclined in a counterclockwise direction. In the illustrated embodiment of the present invention, the plurality of first fins 81 and the plurality of second fins 82 are formed by punching the spoiler 8.
When in use, the tail gas of the diesel engine passes through the third aftertreatment carrier component 3 and the first aftertreatment carrier component 1 and enters the first cavity 53 through the first opening 51; since the arc plate 63 covers the cyclone plate 612 facing the first opening 51, the exhaust gas from the first opening 51 bypasses the arc plate 63 to enter the cyclone tube 61 through the gas inlet 613. With the arrangement, the tail gas flowing from the first opening 51 is prevented from directly rushing to the cyclone tube 61 in a large amount, so that the uneven distribution of the gas flow is caused, and the improvement of the anti-urea crystallization capacity is facilitated. In the process, most of the tail gas enters the cyclone tube 61 from the gas inlet 613 facing away from the first opening 51 on both sides or from the gas inlet 613 facing the first opening 51 through the arc-shaped gas passage. The tail gas is guided by the cyclone plate 612 to rotate and enter the cyclone tube 61; the off-gas and urea droplets mix in the cyclone tube 61 and form a downward swirling gas flow. According to the invention, the spoiler 8 is arranged, and the inclination directions of the first fins 81 and the second fins 82 are opposite, so that the air flows flowing out of the spoiler 8 and guided by the first fins 81 and the second fins 82 can collide with each other, the uniformity of air flow distribution is improved, and the uniformity of ammonia at the inlet of the second aftertreatment carrier assembly 2 is further improved.
The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail with reference to the above embodiments, the technical personnel in the field should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.
Claims (9)
1. A mixing cavity assembly comprises a mixing cavity shell and a mixing tube assembly arranged in the mixing cavity shell, wherein the mixing cavity shell is provided with a first opening communicated with a first post-processing carrier assembly, a second opening communicated with a second post-processing carrier assembly, a first cavity communicated with the first opening and a second cavity communicated with the second opening; the mixing tube assembly comprises a swirl tube located in the first cavity and a connecting tube located in the second cavity; the cyclone tube is provided with a first inner cavity, a plurality of cyclone plates and an airflow inlet corresponding to the cyclone plates, the first inner cavity is communicated with the first cavity through the airflow inlet, the connecting tube is provided with a second inner cavity communicated with the first inner cavity, and the second inner cavity is communicated with the second cavity; the method is characterized in that: the mixing cavity assembly further comprises a spoiler installed in the second opening, the spoiler comprises a plurality of first fins located on the inner ring, a plurality of second fins located on the outer ring, a plurality of first slots corresponding to the first fins in a one-to-one mode, and a plurality of second slots corresponding to the second fins in a one-to-one mode, and the inclination directions of the first fins and the second fins are opposite.
2. The mixing chamber assembly of claim 1, wherein: the first fins incline in the counterclockwise direction, and the second fins incline in the clockwise direction.
3. The mixing chamber assembly of claim 1, wherein: the first fins incline in the clockwise direction, and the second fins incline in the counterclockwise direction.
4. The mixing chamber assembly of claim 1, wherein: the first fins and the second fins are formed by punching the spoiler.
5. The mixing chamber assembly of claim 1, wherein: mix the pipe assembly and still including being located in first cavity and part surround the arc of spinning disk to make tail gas need walk around the arc just can be certainly air inlet gets into the cyclone tube.
6. The mixing chamber assembly of claim 5, wherein: the cross section of the arc-shaped plate is C-shaped.
7. The mixing chamber assembly of claim 6, wherein: the mixing chamber shell is provided with a mounting seat for mounting a urea nozzle, and the urea nozzle is used for spraying atomized urea liquid drops into the cyclone tube.
8. An exhaust aftertreatment package comprising a first aftertreatment carrier component, a second aftertreatment carrier component, a third aftertreatment carrier component located upstream of the first aftertreatment carrier component, and a mixing chamber component connecting the first aftertreatment carrier component with the second aftertreatment carrier component, wherein the first aftertreatment carrier component is a diesel particulate trap, the second aftertreatment carrier component is a selective catalytic reduction agent, the third aftertreatment carrier component is a diesel oxidation catalyst, characterized in that: the mixing chamber assembly of any one of claims 1 to 7.
9. The exhaust aftertreatment package of claim 8, wherein: the spoiler is located at an inlet side of the second aftertreatment carrier assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110936308.7A CN113431666A (en) | 2021-08-16 | 2021-08-16 | Mixing chamber subassembly and tail gas aftertreatment encapsulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110936308.7A CN113431666A (en) | 2021-08-16 | 2021-08-16 | Mixing chamber subassembly and tail gas aftertreatment encapsulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113431666A true CN113431666A (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110936308.7A Pending CN113431666A (en) | 2021-08-16 | 2021-08-16 | Mixing chamber subassembly and tail gas aftertreatment encapsulation |
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| Country | Link |
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| CN (1) | CN113431666A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030803A (en) * | 2022-06-28 | 2022-09-09 | 潍柴动力股份有限公司 | Mixer and diesel engine |
-
2021
- 2021-08-16 CN CN202110936308.7A patent/CN113431666A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030803A (en) * | 2022-06-28 | 2022-09-09 | 潍柴动力股份有限公司 | Mixer and diesel engine |
| CN115030803B (en) * | 2022-06-28 | 2023-12-15 | 潍柴动力股份有限公司 | Mixer and diesel engine |
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