CN109505686A - A kind of urea injection mixed cell for diesel engine vent gas post-processing - Google Patents
A kind of urea injection mixed cell for diesel engine vent gas post-processing Download PDFInfo
- Publication number
- CN109505686A CN109505686A CN201910079683.7A CN201910079683A CN109505686A CN 109505686 A CN109505686 A CN 109505686A CN 201910079683 A CN201910079683 A CN 201910079683A CN 109505686 A CN109505686 A CN 109505686A
- Authority
- CN
- China
- Prior art keywords
- urea
- diesel engine
- mixed cell
- vent gas
- cylinder
- 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
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000004202 carbamide Substances 0.000 title claims abstract description 39
- 238000012805 post-processing Methods 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 title abstract description 13
- 239000007924 injection Substances 0.000 title abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 11
- 208000002925 dental caries Diseases 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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
- F01N3/18—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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- 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]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- 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
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)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of urea for diesel engine vent gas post-processing to spray mixed cell, it includes urea nozzle, nozzle mounting base and cylinder, three cavitys are divided by front baffle and rear bulkhead in the cylinder, the urea nozzle is mounted on the intermediate mixing chamber on cylinder by nozzle mounting base, wherein, exhaust end in the cylinder in the rear bulkhead is connected with Taper Pipe, the Taper Pipe is greater than the radius of the other end close to one end radius of rear bulkhead, and the exhaust end of the Taper Pipe is connected with the blade-type mixer for being mixed again to mixed air-flow.Above-mentioned urea injection mixed cell is not only simple in structure, is compact, ingenious in design；And improve urea and mix evaporation effect, the uniformity of air-flow mixing is improved, urea crystals risk is reduced.
Description
Technical field
The invention belongs to diesel engine vent gas post-processing technologies, more particularly, to a kind of urine for diesel engine vent gas post-processing
Element injection mixed cell.
Background technique
Refering to Figure 1, Fig. 1 is the structure of the existing urea injection mixed cell for diesel engine vent gas post-processing
Schematic diagram, existing urea injection mixed cell include urea nozzle 10, nozzle mounting base 11 and cylinder 12, setting in cylinder 12
There are front baffle 13 and rear bulkhead 14, front baffle 13 and rear bulkhead 14 will be divided into three cavitys in cylinder 12, urea nozzle 10 is logical
Cross on the intermediate mixing chamber that nozzle mounting base 11 is mounted on cylinder 12, when work, exhaust gas by the aperture in front baffle 13 into
Enter intermediate mixing chamber, the urea sprayed with urea nozzle 10 is mixed, and by the aperture outflow on rear bulkhead 14, is entered
SCR carrier.
The key technology of SCR system is NH3With the mixing uniformity of exhaust gas, urea crystals risk is reduced.It is existing mixed
Clutch NH3Mixed path is short, and mixed uniformity is too low, and crystallization risk is larger, leads to NOXTransformation efficiency is low.
Summary of the invention
The purpose of the present invention is to provide a kind of urea for diesel engine vent gas post-processing to spray mixed cell, to solve
Prior art urea sprays mixed cell, and that there are mixed paths is short, the problem that mixed uniformity is too low and crystallization risk is larger.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of urea injection mixed cell for diesel engine vent gas post-processing comprising urea nozzle, nozzle mounting base
And cylinder, the cylinder is interior to be divided into three cavitys by front baffle and rear bulkhead, and the urea nozzle passes through nozzle mounting base
It is mounted on the intermediate mixing chamber on cylinder, wherein the exhaust end in the cylinder in the rear bulkhead is connected with Taper Pipe, described
Taper Pipe is greater than the radius of the other end close to one end radius of rear bulkhead, and the exhaust end of the Taper Pipe is connected with for after to mixing
The blade-type mixer that is mixed again of air-flow.
Particularly, the blade-type mixer includes secondary mixing tube and several diffusions being set in secondary mixing tube
Blade, the secondary mixing tube are fixed on the exhaust end of Taper Pipe.
Particularly, several airflow diversion holes are offered on the side wall of the Taper Pipe.
Particularly, several described airflow diversion holes are in two rows of distributions, and the airflow diversion hole is round hole.
Particularly, it is fixed with several blade items in the secondary mixing tube, is staggeredly disposed on every blade item several
A diffuser vane.
Particularly, the gas flow-disturbing hole of strip is offered on the diffuser vane.
Beneficial effects of the present invention are that the Double layer spiral flow vane type urea injection mixed cell has compared with prior art
It has the advantage that
1) structure is simple, compact, ingenious in design；
2) effect is gathered by Taper Pipe, gathers the air-flow of preposition mixer outflow, improves urea and mix evaporation effect；
3) by under the perturbation action of the airflow diversion hole on Taper Pipe and the diffuser vane on blade-type mixer, make by
The intermediate mixed air-flow of mixing chamber mixes again in cylinder, and under the guiding role of airflow diversion hole and diffuser vane uniformly
The end face for diffusing to SCR carrier.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the existing urea injection mixed cell for diesel engine vent gas post-processing；
Fig. 2 is the urea injection mixed cell for diesel engine vent gas post-processing that the specific embodiment of the invention provides
Structural schematic diagram；
Fig. 3 is the urea injection mixed cell for diesel engine vent gas post-processing that the specific embodiment of the invention provides
The main view of Taper Pipe and blade-type mixer；
Fig. 4 is the urea injection mixed cell for diesel engine vent gas post-processing that the specific embodiment of the invention provides
The side view of Taper Pipe and blade-type mixer.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is makes to the more thorough of the disclosure understanding
Comprehensively.It should be noted that be referred to as " being fixed on " another component when component, it can directly on the other part or
There may also be components placed in the middle.When a component is considered as " connection " another component, it can be directly to separately
One component may be simultaneously present component placed in the middle.Term as used herein "vertical", "horizontal", "left" and "right"
And similar statement is for illustrative purposes only, is not meant to be the only embodiment.Unless otherwise defined, this paper institute
All technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Term as used herein in the specification of the present invention, which is only for the purpose of describing specific embodiments, to be not intended to
The limitation present invention.Term " and or " used herein includes the arbitrary and all of one or more relevant listed items
Combination.
Shown in please see Fig. 2 to Fig. 4, in the present embodiment, a kind of urea injection mixing for diesel engine vent gas post-processing
Unit includes urea nozzle 20, nozzle mounting base 21 and cylinder 22, is divided into cylinder 22 by front baffle 23 and rear bulkhead 24
Three cavitys, urea nozzle 20 are mounted on the intermediate mixing chamber on cylinder 22 by nozzle mounting base 21, in rear in cylinder 22
The exhaust side (i.e. right side) of partition 24 is connected with Taper Pipe 25, and Taper Pipe 25 is greater than the half of the other end close to one end radius of rear bulkhead 24
Diameter, two rows of circular airflow diversion holes 26 are offered on the side wall of Taper Pipe 25, and the exhaust end of Taper Pipe 25 is connected with for mixing
The blade-type mixer 27 that air-flow afterwards is mixed again.
Blade-type mixer 27 includes secondary mixing tube 28, is fixed with four blade items 29 in secondary mixing tube 28, and every
Four diffuser vanes 30 staggeredly are disposed on blade item 29, the gas flow-disturbing hole 31 of strip is offered on diffuser vane 30.
When work, the exhaust gas that diesel engine generates enters intermediate mixing chamber by the aperture in front baffle 23, sprays with urea
The urea that mouth 20 sprays is mixed, and rotates outflow by the aperture on rear bulkhead 24, and gather through Taper Pipe 25 and carry out again
Mixing, mixed major part air-flow mixes again under the disturbance of the diffuser vane 30 of blade-type mixer 27, and is spreading
Under the guiding role of blade 30, it is uniformly flow to SCR carrier end face middle section, fraction air-flow passes through the air-flow on Taper Pipe 25
Tap hole 26 diffuses to the peripheral rim portion of SCR carrier.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (6)
1. it is a kind of for diesel engine vent gas post-processing urea spray mixed cell comprising urea nozzle, nozzle mounting base and
Cylinder, the cylinder is interior to be divided into three cavitys by front baffle and rear bulkhead, and the urea nozzle is pacified by nozzle mounting base
On intermediate mixing chamber on cylinder, which is characterized in that the exhaust end in the cylinder in the rear bulkhead is connected with Taper Pipe,
The Taper Pipe is greater than the radius of the other end close to one end radius of rear bulkhead, and the exhaust end of the Taper Pipe is connected with for mixed
The blade-type mixer that air-flow after conjunction is mixed again.
2. the urea according to claim 1 for diesel engine vent gas post-processing sprays mixed cell, which is characterized in that institute
State several diffuser vanes that blade-type mixer includes secondary mixing tube He is set in secondary mixing tube, the secondary mixing
Pipe is fixed on the exhaust end of Taper Pipe.
3. the urea according to claim 1 or 2 for diesel engine vent gas post-processing sprays mixed cell, feature exists
In offering several airflow diversion holes on the side wall of the Taper Pipe.
4. the urea according to claim 3 for diesel engine vent gas post-processing sprays mixed cell, which is characterized in that institute
Several airflow diversion holes are stated in two rows of distributions, and the airflow diversion hole is round hole.
5. the urea according to claim 2 for diesel engine vent gas post-processing sprays mixed cell, which is characterized in that institute
It states and is fixed with several blade items in secondary mixing tube, several diffuser vanes are staggeredly disposed on every blade item.
6. the urea according to claim 2 for diesel engine vent gas post-processing sprays mixed cell, which is characterized in that institute
State the gas flow-disturbing hole that strip is offered on diffuser vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079683.7A CN109505686A (en) | 2019-01-28 | 2019-01-28 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079683.7A CN109505686A (en) | 2019-01-28 | 2019-01-28 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109505686A true CN109505686A (en) | 2019-03-22 |
Family
ID=65758269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910079683.7A Pending CN109505686A (en) | 2019-01-28 | 2019-01-28 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109505686A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814767A (en) * | 2020-12-31 | 2021-05-18 | 保定市屹马汽车配件制造有限公司 | Ammonia mixer of automobile exhaust system |
| CN113107650A (en) * | 2020-01-09 | 2021-07-13 | 广西大学 | Dynamic mixer for diesel engine urea-SCR system |
| CN114458428A (en) * | 2022-01-05 | 2022-05-10 | 潍柴动力股份有限公司 | SCR mixer and engine |
| CN115680839A (en) * | 2022-11-14 | 2023-02-03 | 一汽解放汽车有限公司 | Aftertreatment mixer and aftertreatment method for reducing urea crystallization |
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| CN106437967A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Honeycomb type rotational flow urea mixing device |
| CN206144635U (en) * | 2016-11-03 | 2017-05-03 | 无锡威孚力达催化净化器有限责任公司 | Processing apparatus after integrated injection formula of SCR |
| CN207905898U (en) * | 2017-12-23 | 2018-09-25 | 无锡威孚力达催化净化器有限责任公司 | A kind of mixing arrangement that rotating flow guidance is combined with mesh |
| WO2019009841A2 (en) * | 2016-12-15 | 2019-01-10 | Ford Otomotiv Sanayi A.S. | Multi-stage mixer |
| CN109236430A (en) * | 2017-07-11 | 2019-01-18 | 天纳克（苏州）排放系统有限公司 | Exhaust aftertreatment mixing arrangement and its encapsulation |
| CN209413970U (en) * | 2019-01-28 | 2019-09-20 | 凯龙高科技股份有限公司 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
-
2019
- 2019-01-28 CN CN201910079683.7A patent/CN109505686A/en active Pending
Patent Citations (6)
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| CN106437967A (en) * | 2016-10-24 | 2017-02-22 | 无锡威孚力达催化净化器有限责任公司 | Honeycomb type rotational flow urea mixing device |
| CN206144635U (en) * | 2016-11-03 | 2017-05-03 | 无锡威孚力达催化净化器有限责任公司 | Processing apparatus after integrated injection formula of SCR |
| WO2019009841A2 (en) * | 2016-12-15 | 2019-01-10 | Ford Otomotiv Sanayi A.S. | Multi-stage mixer |
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| CN207905898U (en) * | 2017-12-23 | 2018-09-25 | 无锡威孚力达催化净化器有限责任公司 | A kind of mixing arrangement that rotating flow guidance is combined with mesh |
| CN209413970U (en) * | 2019-01-28 | 2019-09-20 | 凯龙高科技股份有限公司 | A kind of urea injection mixed cell for diesel engine vent gas post-processing |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107650A (en) * | 2020-01-09 | 2021-07-13 | 广西大学 | Dynamic mixer for diesel engine urea-SCR system |
| CN112814767A (en) * | 2020-12-31 | 2021-05-18 | 保定市屹马汽车配件制造有限公司 | Ammonia mixer of automobile exhaust system |
| CN112814767B (en) * | 2020-12-31 | 2022-05-10 | 保定市屹马汽车配件制造有限公司 | Ammonia mixer of automobile exhaust system |
| CN114458428A (en) * | 2022-01-05 | 2022-05-10 | 潍柴动力股份有限公司 | SCR mixer and engine |
| CN114458428B (en) * | 2022-01-05 | 2023-07-18 | 潍柴动力股份有限公司 | SCR mixer and engine |
| CN115680839A (en) * | 2022-11-14 | 2023-02-03 | 一汽解放汽车有限公司 | Aftertreatment mixer and aftertreatment method for reducing urea crystallization |
| CN115680839B (en) * | 2022-11-14 | 2024-05-10 | 一汽解放汽车有限公司 | Post-treatment mixer and post-treatment method for reducing urea crystallization |
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