CN108150255B - Treating fluid mixing device for vehicle tail gas treatment - Google Patents
Treating fluid mixing device for vehicle tail gas treatment Download PDFInfo
- Publication number
- CN108150255B CN108150255B CN201711410535.6A CN201711410535A CN108150255B CN 108150255 B CN108150255 B CN 108150255B CN 201711410535 A CN201711410535 A CN 201711410535A CN 108150255 B CN108150255 B CN 108150255B
- Authority
- CN
- China
- Prior art keywords
- cavity
- treatment liquid
- liquid inlet
- cyclone tube
- mixing device
- 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
- 239000012530 fluid Substances 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 31
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 22
- 239000004202 carbamide Substances 0.000 claims description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 23
- 229910021529 ammonia Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 24
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a treating fluid mixing device for treating vehicle tail gas, which is mainly improved in that the device comprises a first cavity, wherein a second cavity is arranged on the side surface of the first cavity; one end of the first cavity is closed, and the other end of the first cavity is opened to be used as an air outlet; the second cavity is provided with an air inlet pipe and a treatment liquid inlet; a cyclone tube aligned with the treatment liquid inlet is arranged in the second cavity; the swirl tube is provided with swirl generating blades around the axis; the vortex generating blade is positioned on one section of the cyclone tube close to the treatment liquid inlet, and the other section of the cyclone tube away from the treatment liquid inlet is a porous section; the porous section part on the cyclone tube extends into the first cavity; in the first cavity, a turbulent flow clapboard is arranged behind the second cavity. The invention can increase the mixing effect of ammonia fog, so that ammonia gas and tail gas are mixed more fully.
Description
Technical Field
The invention relates to a urea mixing device for treating vehicle tail gas, belonging to the technical field of diesel engine tail gas treatment system equipment.
Background
With the stricter emission regulations of diesel engines, the exhaust gas after-treatment technology is a technical measure which must be adopted. The SCR can meet the national emission standards IV, V and VI, and the basic principle of the SCR is to atomize 32.5 percent of urea aqueous solution by a urea injection system (commonly called as a urea pump)Spraying the urea solution into an exhaust pipe to be mixed with engine exhaust gas, and carrying out pyrolysis and hydrolysis reaction on the urea solution to generate ammonia (NH)3) Under the action of catalyst, the ammonia gas converts harmful nitrogen oxide (NOx) in the tail gas of diesel engine into harmless nitrogen gas (N)2) And water, the primary task of the engine exhaust treatment technology SCR route is to effectively mix and chemically react the exhaust with ammonia mist while ensuring sufficient temperature before entering the catalyst.
Disclosure of Invention
The invention aims to solve the problems that the tail gas treatment is affected due to insufficient mixing because the mixing path of ammonia and tail gas is short in the tail gas treatment process of the existing SCR, and provides the treating fluid mixing device for the tail gas treatment of the vehicle, which has a simple structure and a compact design and can increase the mixing path of the ammonia and the tail gas. The technical scheme adopted by the invention is as follows:
the main improvement of the treating fluid mixing device for treating the tail gas of the vehicle is that the device comprises a first cavity, wherein a second cavity is arranged on the side surface of the first cavity; one end of the first cavity is closed, and the other end of the first cavity is opened to be used as an air outlet;
the second cavity is provided with an air inlet pipe and a treatment liquid inlet; a cyclone tube aligned with the treatment liquid inlet is arranged in the second cavity; the swirl tube is provided with swirl generating blades around the axis; the vortex generating blade is positioned on one section of the cyclone tube close to the treatment liquid inlet, and the other section of the cyclone tube away from the treatment liquid inlet is a porous section; the porous section part on the cyclone tube extends into the first cavity;
in the first cavity, a turbulent flow clapboard is arranged behind the second cavity.
Further, the air inlet pipe is perpendicular to the axis of the cyclone pipe and opposite to the vortex generating blades.
Further, the gas pocket on the whirl pipe porous section is the equipartition on 360 degrees global.
Further, the treatment liquid injected through the treatment liquid inlet is in the same direction as the axis of the swirl tube.
Furthermore, the second cavity is connected to the side of the first cavity, which is deviated to the closed end.
Furthermore, one end of the cyclone tube close to the treatment liquid inlet is connected with the horn-shaped guide plate.
Further, a temperature sensor and/or a pressure sensor are/is arranged on the first cavity.
Further, the first cavity is a cylindrical cavity.
Furthermore, the second cavity is a U-shaped cavity, and the U-shaped cavity comprises a U-shaped cavity end cover and a U-shaped barrel which are connected; a urea nozzle mounting seat is arranged on the end cover of the U-shaped cavity, and a treatment liquid inlet is formed in the middle of the urea nozzle mounting seat.
The invention has the advantages that: the ammonia fog mixing device is simple in structure, compact in design and convenient to use, the arrangement of the U-shaped cavity provides an ammonia fog mixing space, the arrangement of the spiral-flow pipe can increase the mixing effect of ammonia fog, mixed gas is uniformly dispersed to the periphery through the rear section of the spiral-flow pipe after passing through the U-shaped cavity, tail gas and ammonia gas are fully dispersed through the turbulence effect of the spiral-flow pipe, and tail gas treatment is facilitated.
Drawings
Fig. 1 is a schematic external view of the present invention.
Fig. 2 is a schematic view of the forward cut structure of the present invention.
Fig. 3 is a schematic view of the present invention in a cross-sectional axial view.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
As shown in fig. 1, the present invention provides a treating fluid mixing device for treating exhaust gas of a vehicle, comprising: the device comprises a circular end cover 1, a circular cylinder body 2, a urea nozzle mounting seat 3, a U-shaped cavity end cover 4, an air inlet pipe 5, a turbulent flow partition plate 6, a spiral flow pipe 7, a guide plate 8 and a U-shaped cylinder 9;
the U-shaped cavity end cover 4 is connected with the U-shaped cylinder 9 to form a U-shaped cavity; the round barrel 2 is connected with the round end cover 1 to form a cylindrical cavity, and the U-shaped cavity is embedded into the cylindrical cavity and is positioned on one side of the cylindrical cavity, which is deviated to the closed end; one end of the cylindrical cavity is closed, and the other end of the cylindrical cavity is opened to be used as an air outlet;
an air inlet pipe 5 and a treatment liquid inlet 301 are arranged on the U-shaped cavity body; the urea nozzle mounting seat 3 is arranged on the U-shaped cavity end cover 4, and a treatment liquid inlet 301 is formed in the middle of the urea nozzle mounting seat 3; a swirl tube 7 is arranged in the U-shaped cavity, and the swirl tube 7 is aligned with a treatment liquid inlet 301 on the urea nozzle mounting seat 3; the axis of the air inlet pipe 5 is vertical to the axis of the cyclone pipe 7;
the swirl tube 7 is provided with swirl generating blades 701 around the axis; the vortex generating blade 701 is positioned on one section of the cyclone tube 7 close to the treatment liquid inlet 301, and the other section of the cyclone tube 7 away from the treatment liquid inlet 301 is a porous section; the porous section part on the cyclone tube 7 extends into the cylindrical cavity; one end of the cyclone tube 7 close to the treatment liquid inlet 301 is connected with a horn-shaped guide plate 8;
in the cylindrical cavity, a turbulent flow clapboard 6 is arranged behind the U-shaped cavity. The rear side of the U-shaped cavity refers to the side of the U-shaped cavity facing the air outlet of the cylindrical cavity;
the using method comprises the following steps: the inlet end of the inlet pipe 5 is connected with the exhaust gas of the automobile engine (flange connection, reducer pipe connection, direct welding or direct extending cavity can be used), and can also be connected with other exhaust gas treatment devices in series (flange connection, reducer pipe connection, direct welding can be used). Automobile engine's tail gas gets into the U die cavity by intake pipe 5, flows into 7 upper portions of vortex tube perpendicularly, forms vortex form air current through 7 upper portion blades of vortex tube, and urea is spouted into by the axis direction of the parallel vortex tube 7 of the urea nozzle of installing at urea nozzle mount pad 3, and vortex form air current breaks up urea, and urea volatilizees the ammonia simultaneously under high temperature, and guide plate 8 can guide the air current to sweep the urea nozzle, avoids the crystallization.
Gaseous after ammonia and automobile exhaust intensive mixing, through 7 porous section parts of whirl pipe to dispersing all around, the porous section part of whirl pipe 7 becomes evenly distributed's fluid with the air current, and the equipartition flows in cylindrical cavity with parallel air current behind vortex baffle 6. And the mixed gas after flowing out enters an SCR catalyst for catalysis. The temperature sensor and the pressure sensor can be arranged at optional positions in the cylindrical cavity, and the two types of sensors can control the catalytic treatment of the tail gas more accurately. For example, a temperature sensor is arranged on the cylindrical cavity for measuring the temperature of the mixed gas in the cylindrical cavity.
The whole urea mixing device is suitable for various cylindrical and box type SCR type tail gas aftertreatment products, has small integral structure size, and can be properly amplified and reduced according to the exhaust flow; the urea mixing device is economical, efficient and high in applicability.
Claims (5)
1. The treatment liquid mixing device for the vehicle tail gas treatment is characterized by comprising a first cavity, wherein a second cavity is arranged on the side surface of the first cavity; one end of the first cavity is closed, and the other end of the first cavity is opened to be used as an air outlet;
the second cavity is provided with an air inlet pipe and a treatment liquid inlet; a cyclone tube aligned with the treatment liquid inlet is arranged in the second cavity; the swirl tube is provided with swirl generating blades around the axis; the vortex generating blade is positioned on one section of the cyclone tube close to the treatment liquid inlet, and the other section of the cyclone tube away from the treatment liquid inlet is a porous section; the porous section part on the cyclone tube extends into the first cavity;
a turbulent flow clapboard is arranged in the first cavity behind the second cavity;
the air inlet pipe is vertical to the axis of the cyclone pipe and is opposite to the vortex generating blades;
the treatment liquid sprayed into the cyclone tube through the treatment liquid inlet has the same axial direction as the cyclone tube;
the first cavity is a cylindrical cavity;
the second cavity adopts a U-shaped cavity, and the U-shaped cavity comprises a U-shaped cavity end cover and a U-shaped cylinder which are connected; a urea nozzle mounting seat is arranged on the end cover of the U-shaped cavity, and a treatment liquid inlet is formed in the middle of the urea nozzle mounting seat.
2. The vehicular exhaust gas treatment liquid mixing device according to claim 1,
the air holes on the porous section of the cyclone tube are uniformly distributed on the circumferential surface of 360 degrees.
3. The vehicular exhaust gas treatment liquid mixing device according to claim 1,
the second cavity is connected to one side of the first cavity, which is deviated to the closed end.
4. The vehicular exhaust gas treatment liquid mixing device according to claim 1,
one end of the cyclone tube close to the treatment liquid inlet is connected with a horn-shaped guide plate.
5. The vehicular exhaust gas treatment liquid mixing device according to claim 1,
the first cavity is provided with a temperature sensor and/or a pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410535.6A CN108150255B (en) | 2017-12-23 | 2017-12-23 | Treating fluid mixing device for vehicle tail gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410535.6A CN108150255B (en) | 2017-12-23 | 2017-12-23 | Treating fluid mixing device for vehicle tail gas treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108150255A CN108150255A (en) | 2018-06-12 |
| CN108150255B true CN108150255B (en) | 2020-07-28 |
Family
ID=62465586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711410535.6A Active CN108150255B (en) | 2017-12-23 | 2017-12-23 | Treating fluid mixing device for vehicle tail gas treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108150255B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109453666B (en) * | 2018-11-30 | 2021-09-21 | 精诚工科汽车系统有限公司 | Mixer and vehicle |
| CN110748402B (en) * | 2019-12-06 | 2024-07-02 | 无锡威孚力达催化净化器有限责任公司 | U-shaped post-processor urea mixing device |
| CN111156072B (en) * | 2019-12-19 | 2021-03-19 | 河北亿利科技股份有限公司 | Tail gas aftertreatment mixing arrangement |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101416478B1 (en) * | 2012-08-17 | 2014-07-09 | 세종공업 주식회사 | Mixing module for post treatment exhaust contamination gas decreasing system in diesel engine |
| US9689290B2 (en) * | 2015-12-01 | 2017-06-27 | GM Global Technology Operations LLC | Reductant mixing system for an exhaust gas after-treatment device |
| CN206016920U (en) * | 2016-08-30 | 2017-03-15 | 无锡威孚力达催化净化器有限责任公司 | Urea injection mixed cell for diesel engine vent gas post processing |
| CN206016918U (en) * | 2016-08-30 | 2017-03-15 | 无锡威孚力达催化净化器有限责任公司 | A kind of carbamide injection mixed cell for cartridge type depurator |
| CN206111296U (en) * | 2016-09-26 | 2017-04-19 | 天纳克（苏州）排放系统有限公司 | Hybrid module |
| CN207905902U (en) * | 2017-12-23 | 2018-09-25 | 无锡威孚力达催化净化器有限责任公司 | Vehicle tail gas processing treatment fluid mixing arrangement |
-
2017
- 2017-12-23 CN CN201711410535.6A patent/CN108150255B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108150255A (en) | 2018-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106523092B (en) | The conical surface type eddy flow urea mixing devices of page two | |
| AU2010332964B2 (en) | Method for dosing an urea based reducing agent into a gas exhaust stream | |
| FI125946B (en) | Exhaust after-treatment device | |
| EP2444613B1 (en) | Arrangement and method for treatment of exhaust gases | |
| CN103210192A (en) | Exhaust gas stream vortex breaker | |
| CN203856551U (en) | Mixer module and exhaust cleaning module | |
| CN104564262A (en) | System and apparatus for reducing reductant deposit formation in exhaust aftertreatment systems | |
| CN106523091B (en) | Page window type eddy flow urea mixing device | |
| CN102652211B (en) | For Urea-based injection of reducing agent being mapped to the jet module of discharging in air-flow | |
| CN108150255B (en) | Treating fluid mixing device for vehicle tail gas treatment | |
| CN105156181A (en) | Integrated nozzle type SCR catalysis silencer | |
| CN205190011U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN107939488B (en) | Urea mixing device for treating vehicle tail gas | |
| CN202028346U (en) | Static mixer for urea selective catalytic reduction device of diesel engine | |
| CN207686807U (en) | Vent gas treatment urea mixing device | |
| CN205190013U (en) | SCR aftertreatment hybrid chamber | |
| CN205190012U (en) | Cartridge SCR aftertreatment hybrid chamber | |
| CN109707491A (en) | The mixer of spraying system | |
| CN207686808U (en) | Side post-processes urea mixing device into nozzle integrated form SCR | |
| CN207686804U (en) | Eddy flow urea mixing device | |
| CN106014580A (en) | Novel urea crystallization-prevention exhaust pipe used for diesel engine SCR system | |
| CN207905902U (en) | Vehicle tail gas processing treatment fluid mixing arrangement | |
| CN110439659B (en) | Nozzle integrated SCR post-treatment urea mixing device | |
| CN207686806U (en) | Vehicle tail gas processing urea mixing device | |
| CN104975920B (en) | A kind of SCR system and its box catalytic muffler |
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 |