CN110735693B - Urea mixer for exhaust aftertreatment - Google Patents
Urea mixer for exhaust aftertreatment Download PDFInfo
- Publication number
- CN110735693B CN110735693B CN201911161662.6A CN201911161662A CN110735693B CN 110735693 B CN110735693 B CN 110735693B CN 201911161662 A CN201911161662 A CN 201911161662A CN 110735693 B CN110735693 B CN 110735693B
- Authority
- CN
- China
- Prior art keywords
- urea
- mixed
- mixer
- clam shell
- barrel
- 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.)
- Active
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
- F01N3/08—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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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 invention relates to a urea mixer for exhaust aftertreatment, which comprises an upper cylinder and a lower cylinder, wherein a urea nozzle is installed at the upper end of the upper cylinder, a tail gas inlet is formed in the left side of the upper cylinder, a first right end cover is arranged on the right side of the upper cylinder, a mixed gas outlet is formed in the left side of the lower cylinder, a second right end cover is arranged on the right side of the lower cylinder, the bottom of the upper cylinder is connected with the top of the lower cylinder through a connecting pipe, a urea crushing pipe is arranged in the upper cylinder, and a mixing structure is arranged in the lower cylinder. The invention has simple structure, can ensure that urea can be uniformly distributed on the end surface of the SCR carrier, so that exhaust gas and ammonia gas are uniformly mixed, ensures that the SCR can work efficiently and stably, and better meets the strict boundary requirement of the whole vehicle on the packaging structure.
Description
Technical Field
The invention belongs to the technical field of diesel engine tail gas aftertreatment, and relates to a urea mixer for exhaust aftertreatment.
Background
As the national emission standard of the tail gas pollutants of the diesel vehicle is developed to the sixth European stage, the stricter emission standard has stricter definition on the tail gas pollutants. The SCR (selective catalytic reduction converter) technology has become the first choice of various large main engine plants in China. The principle of the SCR technology is that NH3 generated by urea decomposition is reacted with NOx to generate N2 under the action of a catalyst, so that NOx in exhaust gas is reduced, and the exhaust gas is treated to meet the emission standard of Europe six.
The mixer is usually arranged before the SCR, and the DOC and the DPF are arranged at the rear end, namely a DOC-DPF-mixer-SCR series structure is formed. Exhaust gas is discharged into the atmosphere from DOC → DPF → mixer → SCR. The main effect of blender is let exhaust and urea granule homogeneous mixing, breaks into littleer urea granule with urea nozzle spun urea aqueous solution, prevents urea aqueous solution crystallization, and the conversion efficiency of SCR is improved to the even SCR carrier terminal surface of taking to of atomizing ammonia simultaneously. How to reduce the low-temperature crystallization of urea and evenly bring ammonia to the end face of an SCR carrier becomes a key link in the SCR technology. The existing structure has the problems of easy crystallization of urea, uneven ammonia mixing, overlarge exhaust back pressure of the mixer structure, overlarge size of the mixer and the like.
Disclosure of Invention
The invention aims to provide a urea mixer for exhaust aftertreatment, which can solve the problems that urea is easy to crystallize, ammonia gas is not uniformly mixed, and the exhaust back pressure of a mixer structure is overlarge.
According to the technical scheme provided by the invention: the utility model provides a urea blender for exhaust aftertreatment, includes barrel and lower barrel, it installs the urea nozzle to go up barrel upper end, it has the tail gas entry to go up to open in the barrel left side, it sets up first right-hand member lid to go up the barrel right side, it has the mist export to open in the barrel left side down, the barrel right side sets up the second right-hand member lid down, it connects through the connecting pipe to go up the barrel bottom barrel top down, upward set up the broken pipe of urea in the barrel, set up mixed structure in the barrel down.
As a further improvement of the invention, the top of the urea crushing pipe is positioned below the urea nozzle, and the bottom of the urea crushing pipe is communicated with the hole pipe.
As a further improvement of the invention, the upper part of the urea crushing pipe is of a closed structure, and the periphery of the lower part of the urea crushing pipe is provided with urea crushing pipe holes.
As a further improvement of the present invention, the mixing structure comprises a mixing clam shell and a urea breaker plate; the front end of the mixed clam shell is connected with a urea crushing plate, the tail end of the mixed clam shell is connected with a second right end cover, and the upper end of the mixed clam shell is connected with an upper sealing plate of the mixed clam shell.
As a further improvement of the invention, the mixed clam shell is in a curved arc shape.
As a further refinement of the present invention, a hybrid clam shell includes a parallel section and a ramp section.
As a further improvement of the invention, the urea crushing plate is positioned at the inner side of the mixed gas outlet and is matched with the shape.
As a further improvement of the invention, the urea crushing plate is provided with urea crushing plate holes.
As a further improvement of the invention, the mesh number of the holes of the urea crushing plate is higher than that of the holes of the urea crushing plate.
As a further improvement of the invention, the first right end cover is arc-shaped.
Compared with the prior art, the invention has the following advantages:
1. the invention has simple structure and small occupied space; can be used for U type product and straight section of thick bamboo product simultaneously, increased the whirl effect of blender, guarantee urea spraying and exhaust homogeneous mixing when having increased the mixing distance.
2. The tail end of the mixer is provided with the rectifying plate, so that the mixed gas is ensured to be uniformly distributed on the front end surface of the SCR; the mixing effect is high, the volume of the mixer is small, and the strict boundary requirement of an exhaust system is met; the mixer has small volume, long mixing distance and excellent mixing effect.
Drawings
Fig. 1 is a schematic diagram of the positional relationship of the components of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a cross-sectional view of fig. 2.
Fig. 4 is a left side sectional view of fig. 3.
Fig. 5 is a right sectional view of fig. 3.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In fig. 1-5, the device comprises a urea nozzle 1, a first right end cover 2, a urea crushing pipe 3, a urea crushing pipe hole 3-1, a connecting pipe 4, a second right end cover 5, a mixed clam shell 6, a parallel section 6-1, an inclined section 6-2, a mixed clam shell upper sealing plate 7, a urea crushing plate 8, a urea crushing plate hole 8-1, an upper cylinder 9, a lower cylinder 10 and the like.
As shown in figure 1, the invention relates to a urea mixer for exhaust aftertreatment, which comprises an upper cylinder 9 and a lower cylinder 10, wherein a urea nozzle 1 is arranged at the upper end of the upper cylinder 9, a tail gas inlet is formed in the left side of the upper cylinder 9, and a first right end cover 2 is arranged on the right side of the upper cylinder 9. The left side of the lower cylinder body 10 is provided with a mixed gas outlet, and the right side of the lower cylinder body 10 is provided with a second right end cover 5. The bottom of the upper cylinder 9 is connected with the top of the lower cylinder 10 through a connecting pipe 4. Go up vertical urea broken pipe 3 that sets up in the barrel 9, urea broken pipe 3 top is located urea nozzle 1 below, and broken pipe 3 bottom intercommunication connecting pipe 4 of urea.
The upper part of the urea crushing pipe 3 is of a closed structure, so that urea which is just sprayed out is prevented from being blown away in advance by air flow which does not reach a best mixing area, and the air flow is prevented from blowing the urea upwards to block the urea nozzle 1. The periphery of the lower part is provided with a urea crushing pipe hole 3-1, urea sprayed by the urea nozzle 1 is firstly contacted with the urea crushing pipe hole 3-1, and larger urea particles are crushed into smaller particles in the process of passing through the urea crushing pipe hole 3-1. The urea particles are located in the middle of the upper cylinder 9, the contact area with the tail gas is the best, and the mixing effect is the best.
The first right end cap 2 is arc-shaped. The center of the arc is located at the middle position. Can mix the tail gas water conservancy diversion that gets into from the tail gas entry to the intermediate position of upper barrel 9 with the urea granule, mix the effect better.
The lower cylinder 10 is vertically provided with a mixing clam shell 6 and a urea crushing plate 8, and the urea crushing plate 8 is positioned on the inner side of the mixed gas outlet and has an adaptive shape.
The lower cylinder 10, the urea crushing plate 8 and the second right end cover 5 form a lower cavity. The mixed clam shell 6 is located below the connecting pipe 4, as shown in fig. 5, the mixed clam shell 6 is arc-shaped, the front end of the mixed clam shell 6 is provided with a urea crushing plate 8, the tail end of the mixed clam shell 6 is connected with the second right end cover 5, the upper end of the mixed clam shell 6 is connected with an upper mixed clam shell sealing plate 7, the upper mixed clam shell sealing plate 7 blocks the flow path of mixed gas in the lower barrel 10, and the mixed clam shell 6 and the upper mixed clam shell sealing plate 7 divide the lower chamber into a flow guide cavity and a mixing cavity.
As shown in fig. 5, the mixing clam shell 6 includes a parallel section 6-1 and a slant section 6-2, so that the mixed air flows into the diversion cavity from the top to generate an upward diversion, thereby increasing the mixing effect. As shown in fig. 3, the air flow guided in the oblique direction flows into the mixing cavity after being guided clockwise along the circular arc surface of the mixing clam shell 6. The gas and urea are mixed in a rotating way, and then pass through the urea crushing plate 8 and are discharged out of a mixed gas outlet. The urea crushing plate 8 is provided with urea crushing plate holes 8-1, the mesh number of the urea crushing plate holes 8-1 is higher than that of the urea crushing pipe holes 3-1, and urea in the mixed gas flowing from the upper cylinder 9 can be crushed again.
The working process of the invention is as follows:
as shown in FIG. 2, after entering the exhaust system, the exhaust gas passes through DOC → DPF and then reaches the front end face of the mixer, and the gas is uniformly distributed in the cross section direction of the cylinder. Exhaust enters the interior of the upper cylinder body 9 from a tail gas inlet on the left side of the upper cylinder body 9, the urea nozzle 1 starts to spray urea, the urea and the exhaust flow downwards through the hole pipe 3, and the hole pipe 3 crushes and mixes urea particles for the first time. Urea and exhaust gas enter the lower cylinder 10 through the pipe 4 downwards, and form rotational flow under the action of the mixing clam shell 6 and the mixing plate 7 in the lower cylinder 10, so that urea particles are crushed and mixed for the second time. The exhaust gas then flows to the mixing plate 8 where a third crushing and mixing takes place at the mixing plate 8. Finally, the exhaust gas passes through the mixing plate 8 and flows out from the mixed gas outlet at the left side of the lower cylinder 10.
Claims (8)
1. A urea mixer for exhaust aftertreatment, characterized by: the mixer comprises an upper barrel (9) and a lower barrel (10), wherein a urea nozzle (1) is installed at the upper end of the upper barrel (9), a tail gas inlet is formed in the left side of the upper barrel (9), a first right end cover (2) is arranged on the right side of the upper barrel (9), a mixed gas outlet is formed in the left side of the lower barrel (10), a second right end cover (5) is arranged on the right side of the lower barrel (10), the bottom of the upper barrel (9) is connected with the top of the lower barrel (10) through a connecting pipe (4), a urea crushing pipe (3) is arranged in the upper barrel (9), and a mixing structure is arranged in the lower barrel (10); the upper part of the urea crushing pipe (3) is of a closed structure, and the periphery of the lower part of the urea crushing pipe is provided with a urea crushing pipe hole (3-1); the mixing structure comprises a mixing clam shell (6) and a urea crushing plate (8); the front end of the mixed clam shell (6) is provided with a urea crushing plate (8), the tail end of the mixed clam shell is connected with a second right end cover (5), and the upper end of the mixed clam shell is connected with an upper sealing plate (7).
2. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: the top of the urea crushing pipe (3) is positioned below the urea nozzle (1), and the bottom of the urea crushing pipe (3) is communicated with the connecting pipe (4).
3. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: the mixed clam shell (6) is arc-shaped with a curved surface.
4. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: the hybrid clam shell (6) comprises a parallel section (6-1) and a bevel section (6-2).
5. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: the urea crushing plate (8) is positioned on the inner side of the mixed gas outlet and is matched with the mixed gas outlet in shape.
6. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: and a urea crushing plate hole (8-1) is formed in the urea crushing plate (8).
7. Urea mixer for exhaust gas aftertreatment according to claim 6, characterized in that: the mesh number of the holes (8-1) of the urea crushing plate is higher than that of the holes (3-1) of the urea crushing plate.
8. The urea mixer for exhaust gas aftertreatment according to claim 1, wherein: the first right end cover (2) is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161662.6A CN110735693B (en) | 2019-11-25 | 2019-11-25 | Urea mixer for exhaust aftertreatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161662.6A CN110735693B (en) | 2019-11-25 | 2019-11-25 | Urea mixer for exhaust aftertreatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110735693A CN110735693A (en) | 2020-01-31 |
| CN110735693B true CN110735693B (en) | 2021-05-11 |
Family
ID=69273718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911161662.6A Active CN110735693B (en) | 2019-11-25 | 2019-11-25 | Urea mixer for exhaust aftertreatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110735693B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764988B (en) * | 2020-06-29 | 2021-11-12 | 东风商用车有限公司 | Aftertreatment encapsulation SCR blender unit |
| CN113586212B (en) * | 2021-09-15 | 2022-11-22 | 无锡威孚力达催化净化器有限责任公司 | Mixing device with multi-cyclone structure |
| CN114320541B (en) * | 2021-11-25 | 2023-07-21 | 东风商用车有限公司 | SCR aftertreatment device |
| CN114961935A (en) * | 2022-07-04 | 2022-08-30 | 潍柴动力股份有限公司 | Preheat urea injection structure and aftertreatment device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064345A (en) * | 2010-12-09 | 2012-06-19 | 현대자동차주식회사 | Dosing module for exhaust after-treatment system of vehicle |
| DE102012008556A1 (en) * | 2012-04-27 | 2013-10-31 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Device for exhaust gas aftertreatment of exhaust gas mass flow in exhaust gas line, has injector which is arranged in exhaust gas line for supplying reducing agent in exhaust gas mass flow, where exhaust gas line segment has inlet |
| CN104040130A (en) * | 2012-01-12 | 2014-09-10 | 日野自动车株式会社 | Exhaust gas purification device |
| CN108087067A (en) * | 2017-12-23 | 2018-05-29 | 无锡威孚力达催化净化器有限责任公司 | Eddy flow urea mixing device |
| CN108194178A (en) * | 2017-12-31 | 2018-06-22 | 无锡威孚力达催化净化器有限责任公司 | A kind of radial spray mixer for being used for mixing exhaust and reducing agent fluid |
| CN108457726A (en) * | 2017-02-20 | 2018-08-28 | 天纳克（苏州）排放系统有限公司 | Tail-gas after treatment apparatus |
| CN110080861A (en) * | 2018-01-26 | 2019-08-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas post-treatment device |
-
2019
- 2019-11-25 CN CN201911161662.6A patent/CN110735693B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120064345A (en) * | 2010-12-09 | 2012-06-19 | 현대자동차주식회사 | Dosing module for exhaust after-treatment system of vehicle |
| CN104040130A (en) * | 2012-01-12 | 2014-09-10 | 日野自动车株式会社 | Exhaust gas purification device |
| DE102012008556A1 (en) * | 2012-04-27 | 2013-10-31 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Device for exhaust gas aftertreatment of exhaust gas mass flow in exhaust gas line, has injector which is arranged in exhaust gas line for supplying reducing agent in exhaust gas mass flow, where exhaust gas line segment has inlet |
| CN108457726A (en) * | 2017-02-20 | 2018-08-28 | 天纳克（苏州）排放系统有限公司 | Tail-gas after treatment apparatus |
| CN108087067A (en) * | 2017-12-23 | 2018-05-29 | 无锡威孚力达催化净化器有限责任公司 | Eddy flow urea mixing device |
| CN108194178A (en) * | 2017-12-31 | 2018-06-22 | 无锡威孚力达催化净化器有限责任公司 | A kind of radial spray mixer for being used for mixing exhaust and reducing agent fluid |
| CN110080861A (en) * | 2018-01-26 | 2019-08-02 | 天纳克（苏州）排放系统有限公司 | Exhaust gas post-treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110735693A (en) | 2020-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110735693B (en) | Urea mixer for exhaust aftertreatment | |
| CN206016920U (en) | Urea injection mixed cell for diesel engine vent gas post processing | |
| CN206016918U (en) | A kind of carbamide injection mixed cell for cartridge type depurator | |
| CN207945006U (en) | Side air inlet spar-type platforms SCR mixing arrangements | |
| CN110410185B (en) | Anti-crystallization compact urea mixing device | |
| CN214403720U (en) | SCR mixing device | |
| CN113586212B (en) | Mixing device with multi-cyclone structure | |
| CN207686809U (en) | A kind of swirl vane integrates mixing arrangement with clam shell | |
| CN205190011U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN206158826U (en) | SCR aftertreatment hybrid chamber structure of integrated nozzle | |
| CN211448804U (en) | SCR system hybrid spoiler device meeting national six-standard U-shaped packaging | |
| CN210948852U (en) | Urea mixer of SCR system | |
| CN114483264A (en) | High-efficient anti-crystallization mixer device | |
| CN104847463A (en) | Nozzle integrated SCR post treatment unit and method thereof | |
| CN214330729U (en) | Urea mixer for diesel engine tail gas aftertreatment | |
| CN104879198A (en) | SCR (Selective Catalytic Reduction) system and catalytic reaction unit thereof | |
| CN204877612U (en) | SCR system and catalytic reaction unit thereof | |
| CN217233627U (en) | U-shaped post-treatment urea mixing device | |
| CN213928499U (en) | Post-treatment urea mixing device | |
| CN111963281B (en) | High-efficient blender of diesel engine aftertreatment | |
| CN212898663U (en) | Hybrid structure of exhaust aftertreatment system | |
| CN210889080U (en) | Liquid-gas mixing device | |
| CN112459874A (en) | Mixing assembly of urea mixing device | |
| CN112459884A (en) | Novel structure catalyst converter of diesel oil nation six b | |
| CN111764989A (en) | Efficient post-processing packaged SCR mixer system and processing method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |