CN109854345A - A kind of SCR post-processing urea mixing device - Google Patents
A kind of SCR post-processing urea mixing device Download PDFInfo
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- CN109854345A CN109854345A CN201910191089.7A CN201910191089A CN109854345A CN 109854345 A CN109854345 A CN 109854345A CN 201910191089 A CN201910191089 A CN 201910191089A CN 109854345 A CN109854345 A CN 109854345A
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- partition
- shaped partition
- mixing
- mixing tube
- gas treatment
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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
The present invention relates to a kind of SCR after-treatment device, specifically a kind of SCR post-processes urea mixing device, belongs to tail gas treatment system of diesel engine technical field.It includes vent gas treatment cylinder, U-shaped partition, swirl mixing tube and mesh partition, and vent gas treatment cylinder is interior to be successively arranged U-shaped partition and mesh partition along exhaust gas flow direction, and mixing rear chamber is formed between vent gas treatment cylinder, U-shaped partition and mesh partition；Swirl mixing tube is equipped in U-shaped partition, swirl mixing tube includes mixing tube and diversion pipe, and diversion pipe lower half is along the circumferential direction uniformly provided with multiple deflector holes, and duct lumen is connected to by deflector hole with U-shaped partition inner cavity.The invention has the advantages of simple structure, compactness and reasonable structure, and the tail gas into swirl mixing tube shunts and the secondary mixing of urea, improves mixed effect, and can save incorporation time, greatly improves gas mixing efficiency, ensure that vent gas treatment effect.
Description
Technical field
The present invention relates to a kind of SCR after-treatment device, specifically a kind of SCR post-processes urea mixing device, belongs to
Tail gas treatment system of diesel engine technical field.
Background technique
Increasingly strict with diesel engine emissions regulations, exhaust aftertreatment technology is the technical measures that must be used.And SCR
Technology can satisfy state IV and state's V discharge standard, and the basic principle of SCR is will by urea injection system (being commonly called as urea pump)
32.5% concentration aqueous solution of urea atomization after spray into exhaust pipe in mix with motor exhaust, aqueous solution of urea by pyrolysis with
Hydrolysis generates ammonia (NH3), ammonia is by oxynitrides (NOx) harmful in diesel engine vent gas under the effect of the catalyst
It is converted into harmless nitrogen (N2) and water, the top priority of motor exhaust processing technique SCR route is to fill tail gas with ammonia mist
Divide the biochemical reaction of hybrid concurrency, while guaranteeing sufficient temp before entering catalyst.
In the prior art, there is tail gas and ammonia undercompounding during handling vehicle exhaust in SCR, thus
Cause vent gas treatment incomplete.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, to provide a kind of SCR post-processing urea mixing device, energy
It is enough sufficiently mixed tail gas and urea, and incorporation time can be saved, greatly improve gas mixing efficiency, ensure that tail
Gas disposal effect.
According to technical solution provided by the invention, a kind of SCR post-processing urea mixing device includes vent gas treatment cylinder, U
Shape partition, swirl mixing tube and mesh partition, it is characterized in that: being successively arranged U along exhaust gas flow direction in vent gas treatment cylinder
Shape partition and mesh partition, the inlet end of the open end of U-shaped partition to vent gas treatment cylinder；The U-shaped partition and mesh every
There are certain gaps between plate, and there are certain gap, tail gas between the two sides and vent gas treatment cylinder madial wall of U-shaped partition
It handles and forms mixing rear chamber between cylinder, U-shaped partition and mesh partition；
Swirl mixing tube is equipped in the U-shaped partition, swirl mixing tube includes mixing tube and diversion pipe, and diversion pipe is laterally arranged,
Mixing tube is vertically connected on diversion pipe upper end, and duct lumen is connected to up and down with mixing tube；The diversion pipe lower half is circumferentially
Direction is uniformly provided with multiple deflector holes, and duct lumen is connected to by deflector hole with U-shaped partition inner cavity；The diversion pipe both ends are equipped with
The opening of opening, diversion pipe both ends is connected to mixing rear chamber；The mixing tube two sides are symmetrically arranged with mixing mouth, and mixing mouth will mix
Tube cavity is closed to be connected to U-shaped partition inner cavity.
Further, the open end both sides of the edge of U-shaped partition are equipped with guide plate, two guide plates of U-shaped partition two sides it
Between spacing along tail gas airintake direction from large to small, guide plate and vent gas treatment cylinder madial wall are tightly connected.
Further, a distributing fin is equipped at each deflector hole, tail gas enters diversion pipe with distributing fin water conservancy diversion
In.
Further, it mixes at mouth and is tangentially equipped with swirl vane.
Further, mesh separator edge is sealedly connected in vent gas treatment cylinder madial wall.
Compared with the prior art the present invention has the advantage that
The invention has the advantages of simple structure, compactness and reasonable structure, and the tail gas into swirl mixing tube shunts and the secondary mixing of urea, improves mixed
Effect is closed, and incorporation time can be saved, gas mixing efficiency is greatly improved, ensure that vent gas treatment effect.
Detailed description of the invention
Fig. 1 is perspective view of the present invention.
Fig. 2 is part-structure perspective view of the present invention.
Description of symbols: 1- vent gas treatment cylinder, 2-U shape partition, 3- mixing tube, 4- diversion pipe, 5- distributing fin, 6-
Deflector hole, 7- mixing mouth, 8- swirl vane, 9- mesh partition, 10- guide plate, 11- mixing rear chamber.
Specific embodiment
The present invention will be further described in conjunction with the embodiment in attached drawing below:
As shown in Figure 1 and 2, the invention mainly comprises vent gas treatment cylinder 1, U-shaped partition 2, swirl mixing tube and mesh partitions 9.
Be successively arranged U-shaped partition 2 and mesh partition 9 along exhaust gas flow direction in vent gas treatment cylinder 1, the U-shaped every
Inlet end of the open end of plate 2 to vent gas treatment cylinder 1.
There are certain gap, the two sides of U-shaped partition 2 and vent gas treatment cylinders between the U-shaped partition 2 and mesh partition 9
There are certain gaps between 1 inner sidewall of body, and mixing back cavity is formed between vent gas treatment cylinder 1, U-shaped partition 2 and mesh partition 9
Body 11.
9 edge seal of mesh partition is connected on 1 inner sidewall of vent gas treatment cylinder.
The open end both sides of the edge of the U-shaped partition 2 are equipped with guide plate 10, two guide plates 10 of 2 two sides of U-shaped partition it
Between spacing along tail gas airintake direction from large to small, guide plate 10 and 1 inner sidewall of vent gas treatment cylinder are tightly connected.
Swirl mixing tube is equipped in the U-shaped partition 2, swirl mixing tube includes mixing tube 3 and diversion pipe 4, and diversion pipe 4 is horizontal
To setting, mixing tube 3 is vertically connected on 4 upper end of diversion pipe, and 4 inner cavity of diversion pipe is connected to about 3 mixing tube.When in use, it urinates
Right above mixing tube 3, urea is sprayed into from top to bottom in mixing tube 3 for plain nozzle setting.
4 lower half of diversion pipe is along the circumferential direction uniformly provided with multiple deflector holes 6, deflector hole 6 by 4 inner cavity of diversion pipe and
The connection of 2 inner cavity of U-shaped partition, enables partial tail gas to can smoothly enter into diversion pipe 4.
A distributing fin 5 is equipped at each deflector hole 6, tail gas enters in diversion pipe 4 with 5 water conservancy diversion of distributing fin.It leads
4 both ends of flow tube are equipped with opening, and the opening at 4 both ends of diversion pipe is connected to mixing rear chamber.
3 two sides of mixing tube are symmetrically arranged with mixing mouth 7, and mixing mouth 7 connects 3 inner cavity of mixing tube and 2 inner cavity of U-shaped partition
It is logical, partial tail gas can smoothly enter into mixing tube 3.
Swirl vane 8 is tangentially equipped at the mixing mouth 7, swirl vane 8 can allow the tail gas into mixing mouth 7 tangential
It rotates into mixing tube 3.
The working principle of the invention is: when in use, being divided into two parts into the tail gas in U-shaped partition, a part passes through
Mixing mouth enters in mixing tube, and the urea that top is injected into is mixed with this partial tail gas.Mix the eddy flow being arranged at mouth
Blade can allow tail gas tangentially to rotate into mixing tube, improve the mixed effect of tail gas and urea.Another part tail gas passes through
Deflector hole enters in diversion pipe, and distributing fin can carry out water conservancy diversion to the tail gas entered in deflector hole, into the tail in diversion pipe
Gas mixes again with top urea and tail gas mixed gas, forms tail gas and mixes with the secondary of urea, so that tail gas is filled with urea
Divide and is uniformly mixed.Mixed gas enters mixing rear chamber by opening, flows out finally along mesh partition.
The invention has the advantages of simple structure, compactness and reasonable structure, and the tail gas into swirl mixing tube shunts and the secondary mixing of urea, improves
Mixed effect, and incorporation time can be saved, it gas mixing efficiency greatly improved, ensure that vent gas treatment effect.
Claims (5)
1. a kind of SCR post-processes urea mixing device, including vent gas treatment cylinder (1), U-shaped partition (2), swirl mixing tube and net
Hole partition (9), it is characterized in that: being successively arranged U-shaped partition (2) and mesh along exhaust gas flow direction in vent gas treatment cylinder (1)
Partition (9), the inlet end of the open end of U-shaped partition (2) to vent gas treatment cylinder (1)；The U-shaped partition (2) and mesh every
There are certain gaps between plate (9), and there are certain between the two sides and vent gas treatment cylinder (1) inner sidewall of U-shaped partition (2)
Gap forms mixing rear chamber (11) between vent gas treatment cylinder (1), U-shaped partition (2) and mesh partition (9)；
Swirl mixing tube is equipped in the U-shaped partition (2), swirl mixing tube includes mixing tube (3) and diversion pipe (4), diversion pipe
(4) laterally setting, mixing tube (3) are vertically connected on diversion pipe (4) upper end, and diversion pipe (4) inner cavity connects up and down with mixing tube (3)
It is logical；Diversion pipe (4) lower half is along the circumferential direction uniformly provided with multiple deflector holes (6), and deflector hole (6) will be in diversion pipe (4)
Chamber is connected to U-shaped partition (2) inner cavity；Diversion pipe (4) both ends be equipped with opening, the opening at diversion pipe (4) both ends with mix after
Cavity (11) connection；Mixing tube (3) two sides are symmetrically arranged with mixing mouth (7), mix mouth (7) for mixing tube (3) inner cavity and U-shaped
The connection of partition (2) inner cavity.
2. a kind of SCR as described in claim 1 post-processes urea mixing device, it is characterized in that: U-shaped partition (2) are opened
Mouthful end both sides of the edge are equipped with guide plate (10), the spacing between two guide plates (10) of U-shaped partition (2) two sides along tail gas into
From large to small, guide plate (10) and vent gas treatment cylinder (1) inner sidewall are tightly connected in gas direction.
3. a kind of SCR as described in claim 1 post-processes urea mixing device, it is characterized in that: at each deflector hole (6)
Equipped with a distributing fin (5), tail gas enters in diversion pipe (4) with distributing fin (5) water conservancy diversion.
4. a kind of SCR as described in claim 1 post-processes urea mixing device, it is characterized in that: edge is cut at the mixing mouth (7)
To equipped with swirl vane (8).
5. a kind of SCR as described in claim 1 post-processes urea mixing device, it is characterized in that: the mesh partition (9) edge
It is sealedly connected on vent gas treatment cylinder (1) inner sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191089.7A CN109854345B (en) | 2019-03-12 | 2019-03-12 | SCR aftertreatment urea mixing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191089.7A CN109854345B (en) | 2019-03-12 | 2019-03-12 | SCR aftertreatment urea mixing arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854345A true CN109854345A (en) | 2019-06-07 |
| CN109854345B CN109854345B (en) | 2020-10-27 |
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ID=66900759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910191089.7A Active CN109854345B (en) | 2019-03-12 | 2019-03-12 | SCR aftertreatment urea mixing arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN109854345B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848005A (en) * | 2019-11-26 | 2020-02-28 | 无锡亿利环保科技有限公司 | Engine tail gas aftertreatment mixing arrangement |
| CN111561379A (en) * | 2020-06-02 | 2020-08-21 | 山东交通学院 | Dynamic mixer for diesel engine tail gas aftertreatment and treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120162A (en) * | 2017-06-29 | 2017-09-01 | 杭州银轮科技有限公司 | Mixing arrangement for motor exhaust after-treatment system |
| CN108457727A (en) * | 2018-04-19 | 2018-08-28 | 凯德斯环保科技（苏州）有限公司 | SCR urea mixers |
| WO2018222180A1 (en) * | 2017-05-31 | 2018-12-06 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer for a vehicle exhaust system |
| CN109184867A (en) * | 2018-08-24 | 2019-01-11 | 无锡威孚力达催化净化器有限责任公司 | The cartridge type urea mixer of embedded rotating vane |
| WO2019045748A1 (en) * | 2017-09-01 | 2019-03-07 | Faurecia Emissions Control Technologies, Usa, Llc | Compact mixer with flow diverter |
-
2019
- 2019-03-12 CN CN201910191089.7A patent/CN109854345B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018222180A1 (en) * | 2017-05-31 | 2018-12-06 | Faurecia Emissions Control Technologies, Usa, Llc | Mixer for a vehicle exhaust system |
| CN107120162A (en) * | 2017-06-29 | 2017-09-01 | 杭州银轮科技有限公司 | Mixing arrangement for motor exhaust after-treatment system |
| WO2019045748A1 (en) * | 2017-09-01 | 2019-03-07 | Faurecia Emissions Control Technologies, Usa, Llc | Compact mixer with flow diverter |
| CN108457727A (en) * | 2018-04-19 | 2018-08-28 | 凯德斯环保科技（苏州）有限公司 | SCR urea mixers |
| CN109184867A (en) * | 2018-08-24 | 2019-01-11 | 无锡威孚力达催化净化器有限责任公司 | The cartridge type urea mixer of embedded rotating vane |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848005A (en) * | 2019-11-26 | 2020-02-28 | 无锡亿利环保科技有限公司 | Engine tail gas aftertreatment mixing arrangement |
| CN110848005B (en) * | 2019-11-26 | 2020-10-20 | 无锡亿利环保科技有限公司 | Engine tail gas aftertreatment mixing arrangement |
| CN111561379A (en) * | 2020-06-02 | 2020-08-21 | 山东交通学院 | Dynamic mixer for diesel engine tail gas aftertreatment and treatment method |
| CN111561379B (en) * | 2020-06-02 | 2021-08-03 | 山东交通学院 | Dynamic mixer for diesel engine tail gas aftertreatment and treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109854345B (en) | 2020-10-27 |
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