CN111287825A - Mixing pipe assembly and exhaust gas aftertreatment device - Google Patents
Mixing pipe assembly and exhaust gas aftertreatment device Download PDFInfo
- Publication number
- CN111287825A CN111287825A CN202010214810.2A CN202010214810A CN111287825A CN 111287825 A CN111287825 A CN 111287825A CN 202010214810 A CN202010214810 A CN 202010214810A CN 111287825 A CN111287825 A CN 111287825A
- Authority
- CN
- China
- Prior art keywords
- section
- mixing tube
- tube
- catalyst carrier
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate 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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A mixing tube assembly comprising a mixing tube, a swirl tube partially mounted in the mixing tube, a baffle mounted between the mixing tube and the swirl tube, and a perforated tube mounted in the swirl tube. An annular space is formed between the mixing pipe and the cyclone pipe, and the baffle is blocked in the annular space. The cyclone tube is provided with a first section and a second section which is positioned at the downstream of the first section, wherein the first section is provided with a plurality of fins for guiding airflow to flow in to form cyclone. The baffle is fixed on the second section and close to the first section so as to force the airflow to pass through the fins and enter the cyclone tube, thereby improving the cyclone effect and improving the mixing performance. The invention also relates to an exhaust gas aftertreatment device with the mixing tube assembly.
Description
Technical Field
The invention relates to a mixing pipe assembly and a tail gas aftertreatment device, and belongs to the technical field of diesel engine tail gas aftertreatment.
Background
Diesel exhaust aftertreatment devices typically include a housing and, enclosed therein, a diesel catalytic oxidizer (DOC), a diesel particulate trap (DPF), and a Selective Catalytic Reductant (SCR). In order to improve the performance of diesel exhaust after-treatment devices, they also typically include a mixing device downstream of the diesel particulate trap (DPF) and upstream of the Selective Catalytic Reduction (SCR). With the continuous upgrading of emission regulations, how to better optimize the performance of the mixing device is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a mixing tube assembly with good mixing performance and an exhaust gas aftertreatment device with the same.
In order to achieve the purpose, the invention adopts the following technical scheme: a mixing tube assembly comprising a mixing tube, a swirl tube partially mounted in the mixing tube, a baffle mounted between the mixing tube and the swirl tube forming an annular space therebetween, and a perforated tube mounted in the swirl tube, the baffle being plugged in the annular space to partition the annular space into a first space upstream of the baffle and a second space downstream of the baffle; the cyclone tube is provided with a first section and a second section positioned at the downstream of the first section, wherein the first section is provided with a plurality of fins for guiding airflow to flow in to form cyclone, the second section is provided with a plurality of first through holes penetrating through the peripheral wall surface, and the first through holes are communicated with the second space; the baffle is fixed to the second section and adjacent to the first section to force the airflow in the first space through the fins into the cyclone tube.
As a further improved technical scheme of the invention, the fin part is positioned in the mixing tube and partially protrudes out of the mixing tube.
As a further improved technical scheme of the invention, the mixing pipe comprises a first circular pipe with a first diameter, a second circular pipe with a second diameter and a conical pipe for connecting the first circular pipe and the second circular pipe, and the baffle is arranged in the area where the conical pipe is located.
As a further improved technical solution of the present invention, the mixing tube assembly includes an end cover and a nozzle holder fixed on the end cover, the nozzle holder is used for mounting a urea nozzle, the swirl tube includes a first end and a second end opposite to the first end, and the first end is fixed on the end cover.
As a further improved technical solution of the present invention, the second end is provided with a first claw portion for fixing the swirl tube to the inner wall of the mixing tube.
As a further improved technical solution of the present invention, the perforated pipe is provided with a third end fixed to the end cover and a fourth end opposite to the third end, and the fourth end is provided with a second claw portion for fixing the perforated pipe to the inner wall of the swirl pipe.
As a further improved technical solution of the present invention, a distance between the second claw portion and the end cap is smaller than a distance between the first claw portion and the end cap.
As a further improved technical solution of the present invention, the perforated pipe is provided with a third section corresponding to the first section and a fourth section corresponding to the second section, wherein the third section is provided with a plurality of third perforations having a circular shape, and the fourth section is provided with a plurality of fourth perforations having a circular shape, and the diameter of the third perforations is larger than that of the fourth perforations.
The present invention also relates to an exhaust gas aftertreatment device comprising a housing, a first catalyst carrier located within the housing, a second catalyst carrier located downstream of the first catalyst carrier, a third catalyst carrier located downstream of the second catalyst carrier, and the aforementioned mixing tube assembly communicating the second catalyst carrier with the third catalyst carrier.
As a further improved technical solution of the present invention, the first catalyst carrier is a diesel catalytic oxidizer (DOC), the second catalyst carrier is a diesel particulate trap (DPF), and the third catalyst carrier is a Selective Catalytic Reducer (SCR).
Compared with the prior art, the invention forces the airflow in the first space to pass through the fins to enter the cyclone tube by arranging the baffle plate, thereby improving the cyclone effect and improving the mixing performance.
Drawings
Fig. 1 is a schematic perspective view of an exhaust gas aftertreatment device according to the invention.
Fig. 2 is a rear view of fig. 1.
Fig. 3 is a schematic sectional view taken along line a-a in fig. 2.
Fig. 4 is a partially enlarged view of a portion of the picture frame of fig. 3.
Fig. 5 is a perspective view of a mixing tube assembly of the present invention.
Fig. 6 is an exploded perspective view of fig. 5.
Detailed Description
Referring to fig. 1 to 6, the present invention discloses an exhaust gas aftertreatment device 100, which includes a housing 10, a first catalyst carrier 101 disposed in the housing 10, a second catalyst carrier 102 disposed downstream of the first catalyst carrier 101, a third catalyst carrier (not shown) disposed downstream of the second catalyst carrier 102, and a mixing tube assembly 200 communicating the second catalyst carrier 102 and the third catalyst carrier. The housing 10 is provided with an air inlet 103 and an air outlet 104. In one embodiment of the present invention, the first catalyst carrier 101 is a diesel catalytic oxidizer (DOC), the second catalyst carrier 102 is a diesel particulate trap (DPF), and the third catalyst carrier is a Selective Catalytic Reducer (SCR).
In the illustrated embodiment of the invention, the mixing tube 1 comprises a first circular tube 11 having a first diameter, a second circular tube 12 having a second diameter, and a conical tube 13 connecting the first circular tube 11 and the second circular tube 12.
The cyclone tube 2 has a first section 21 and a second section 22 located downstream of the first section 21, wherein the first section 21 has a plurality of fins 211 guiding the airflow to flow in to form a cyclone, and the second section 22 has a plurality of first through holes 221 penetrating through the peripheral wall surface. The fins 211 are partly located in the mixing tube 1, partly protruding from the mixing tube 1. The swirl tube 2 comprises a first end 210 and a second end 220 opposite to the first end 210, the first end 210 is fixed on the end cover 5, and the second end 220 is provided with a first claw 2201 for fixing the swirl tube 2 on the inner wall of the mixing tube 1.
An annular space 20 is formed between the mixing tube 1 and the cyclone tube 2, and the baffle plate 3 is blocked in the annular space 20 to divide the annular space 20 into a first space 201 located at the upstream of the baffle plate 3 and a second space 202 located at the downstream of the baffle plate 3. Referring to fig. 4, the first through hole 221 is communicated with the second space 202; the baffle 3 is fixed to the second section 22 and adjacent to the first section 21 to force the airflow in the first space 201 through the fins 211 into the cyclone tube 2. In the illustrated embodiment of the invention, the baffle 3 is arranged in the region of the cone 13.
The perforated pipe 4 is provided with a third end 41 fixed on the end cover 5 and a fourth end 42 opposite to the third end 41, and the fourth end 42 is provided with a second claw 421 for fixing the perforated pipe 4 on the inner wall of the swirl pipe 2. The distance between the second claw 421 and the end cap 5 is smaller than the distance between the first claw 2201 and the end cap 5. The perforated tube 4 is provided with a third section 43 corresponding to the first section 21 and a fourth section 44 corresponding to the second section 22, wherein the third section 43 is provided with a number of third perforations 431 with a circular shape and the fourth section 44 is provided with a number of fourth perforations 441 with a circular shape, and the diameter of the third perforations 431 is larger than the diameter of the fourth perforations 441.
Compared with the prior art, the invention improves the effect of cyclone and improves the mixing performance by arranging the baffle 3 to force the airflow in the first space 201 to pass through the fins 211 to enter the cyclone tube 2.
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 (10)
1. A mixing tube assembly comprising a mixing tube, a swirl tube partially mounted in the mixing tube, a baffle plate mounted between the mixing tube and the swirl tube, and a perforated tube mounted in the swirl tube, the mixing tube and the swirl tube forming an annular space therebetween, the baffle plate plugging in the annular space to partition the annular space into a first space upstream of the baffle plate and a second space downstream of the baffle plate; the cyclone tube is provided with a first section and a second section positioned at the downstream of the first section, wherein the first section is provided with a plurality of fins for guiding airflow to flow in to form cyclone, the second section is provided with a plurality of first through holes penetrating through the peripheral wall surface, and the first through holes are communicated with the second space; the baffle is fixed to the second section and adjacent to the first section to force the airflow in the first space through the fins into the cyclone tube.
2. The mixing tube assembly of claim 1, wherein: the fin is partially located in the mixing tube and partially protrudes from the mixing tube.
3. The mixing tube assembly of claim 1, wherein: the mixing pipe comprises a first round pipe with a first diameter, a second round pipe with a second diameter and a conical pipe for connecting the first round pipe with the second round pipe, and the baffle is arranged in the area where the conical pipe is located.
4. The mixing tube assembly of claim 1, wherein: the mixing tube assembly comprises an end cover and a nozzle holder fixed on the end cover, the nozzle holder is used for mounting a urea nozzle, the swirl tube comprises a first end and a second end opposite to the first end, and the first end is fixed on the end cover.
5. The mixing tube assembly of claim 4, wherein: the second end is provided with a first claw part used for fixing the cyclone tube on the inner wall of the mixing tube.
6. The mixing tube assembly of claim 5, wherein: the perforated pipe is provided with a third end fixed on the end cover and a fourth end opposite to the third end, and the fourth end is provided with a second claw part used for fixing the perforated pipe on the inner wall of the cyclone pipe.
7. The mixing tube assembly of claim 6, wherein: the distance between the second claw part and the end cover is smaller than that between the first claw part and the end cover.
8. The mixing tube assembly of claim 1, wherein: the perforated pipe is provided with a third section corresponding to the first section and a fourth section corresponding to the second section, wherein the third section is provided with a circular plurality of third perforations, and the fourth section is provided with a circular plurality of fourth perforations, and the diameter of the third perforations is larger than that of the fourth perforations.
9. An exhaust gas aftertreatment device comprising a housing, a first catalyst carrier located within the housing, a second catalyst carrier located downstream of the first catalyst carrier, a third catalyst carrier located downstream of the second catalyst carrier, and a mixing tube assembly communicating the second catalyst carrier with the third catalyst carrier, characterized in that: the mixing tube assembly of any one of claims 1 to 8.
10. The exhaust gas aftertreatment device of claim 9, wherein: the first catalyst carrier is a diesel catalytic oxidizer (DOC), the second catalyst carrier is a diesel particulate trap (DPF), and the third catalyst carrier is a Selective Catalytic Reducer (SCR).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214810.2A CN111287825A (en) | 2020-03-24 | 2020-03-24 | Mixing pipe assembly and exhaust gas aftertreatment device |
| PCT/CN2020/118232 WO2021189796A1 (en) | 2020-03-24 | 2020-09-28 | Mixing pipe assembly and tail gas aftertreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214810.2A CN111287825A (en) | 2020-03-24 | 2020-03-24 | Mixing pipe assembly and exhaust gas aftertreatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287825A true CN111287825A (en) | 2020-06-16 |
Family
ID=71019438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010214810.2A Pending CN111287825A (en) | 2020-03-24 | 2020-03-24 | Mixing pipe assembly and exhaust gas aftertreatment device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111287825A (en) |
| WO (1) | WO2021189796A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189796A1 (en) * | 2020-03-24 | 2021-09-30 | 天纳克（苏州）排放系统有限公司 | Mixing pipe assembly and tail gas aftertreatment device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016004333A1 (en) * | 2016-04-13 | 2017-10-19 | Roth Technik Austria Gesellschaft Mit Beschränkter Haftung | Exhaust after-treatment device with catalyst and mixing device |
| CN207989116U (en) * | 2018-01-26 | 2018-10-19 | 天纳克（苏州）排放系统有限公司 | Exhaust gas post-treatment device |
| CN108590814B (en) * | 2018-05-23 | 2025-03-25 | 天纳克（苏州）排放系统有限公司 | Engine exhaust aftertreatment device |
| CN110359989A (en) * | 2019-08-26 | 2019-10-22 | 凯龙高科技股份有限公司 | A kind of performance chamber mixer for diesel engine vent gas processing |
| CN110332035B (en) * | 2019-08-27 | 2020-01-31 | 潍柴动力股份有限公司 | SCR mixer and engine |
| CN110671173A (en) * | 2019-09-29 | 2020-01-10 | 潍柴动力股份有限公司 | Engine aftertreatment system and SCR mixer thereof |
| CN111287825A (en) * | 2020-03-24 | 2020-06-16 | 天纳克（苏州）排放系统有限公司 | Mixing pipe assembly and exhaust gas aftertreatment device |
| CN211777665U (en) * | 2020-03-24 | 2020-10-27 | 天纳克（苏州）排放系统有限公司 | Mixing pipe assembly and exhaust gas aftertreatment device |
| CN111425285A (en) * | 2020-05-12 | 2020-07-17 | 天纳克（苏州）排放系统有限公司 | Mixing pipe assembly and exhaust gas aftertreatment device |
-
2020
- 2020-03-24 CN CN202010214810.2A patent/CN111287825A/en active Pending
- 2020-09-28 WO PCT/CN2020/118232 patent/WO2021189796A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189796A1 (en) * | 2020-03-24 | 2021-09-30 | 天纳克（苏州）排放系统有限公司 | Mixing pipe assembly and tail gas aftertreatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021189796A1 (en) | 2021-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106640301A (en) | Tail gas post-treatment device | |
| WO2018006718A1 (en) | Tail gas aftertreatment device | |
| CN110080861B (en) | Exhaust gas aftertreatment device | |
| WO2021189795A1 (en) | Diesel engine tail gas after treatment apparatus | |
| CN211777665U (en) | Mixing pipe assembly and exhaust gas aftertreatment device | |
| CN113431666A (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN111287825A (en) | Mixing pipe assembly and exhaust gas aftertreatment device | |
| CN110056418B (en) | Exhaust aftertreatment device for box-type engine | |
| CN111425285A (en) | Mixing pipe assembly and exhaust gas aftertreatment device | |
| CN213450557U (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN108952905B (en) | Mixing device | |
| CN113503205A (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN212027908U (en) | Mixing pipe assembly and exhaust gas aftertreatment device | |
| CN213450558U (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN112324548A (en) | Tail gas aftertreatment encapsulation | |
| CN110056414A (en) | Tail-gas after treatment apparatus | |
| CN213654966U (en) | Tail gas aftertreatment encapsulation | |
| CN215860408U (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN215860409U (en) | Mixing chamber subassembly and tail gas aftertreatment encapsulation | |
| CN213654961U (en) | Mixer assembly and exhaust aftertreatment package | |
| CN212154909U (en) | Diesel engine tail gas after-treatment device | |
| CN222045897U (en) | Preceding urea injection pipe subassembly and tail gas aftertreatment device | |
| CN213654963U (en) | Tail gas aftertreatment encapsulation | |
| CN219529122U (en) | Air inlet assembly and tail gas aftertreatment device | |
| CN213450561U (en) | Mixing tube assembly, mixing chamber assembly and exhaust aftertreatment package |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |