CN108590826A - Hydrojet quick steaming unit in pipeline - Google Patents
Hydrojet quick steaming unit in pipeline Download PDFInfo
- Publication number
- CN108590826A CN108590826A CN201810602817.4A CN201810602817A CN108590826A CN 108590826 A CN108590826 A CN 108590826A CN 201810602817 A CN201810602817 A CN 201810602817A CN 108590826 A CN108590826 A CN 108590826A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- steaming
- evaporation
- group
- hydrojet
- 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
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
-
- 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
- F01N2610/1486—Means to prevent the substance from freezing
-
- 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
- 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
Hydrojet quick steaming unit in a kind of pipeline of present invention offer, injection site is provided in pipeline, and injection site is arranged in Way in, the Steaming structure of tapered distribution is additionally provided in the pipeline by holder, and cone angle opening direction is consistent with liquid flow direction in pipeline, the Steaming structure includes 37 groups of evaporation elements, and every group of evaporation element is the combination of cirque structure, spherical structure, cirque structure and spherical structure or the combination of cirque structure and cirque structure.The configuration of the present invention is simple, flow resistance is small, meanwhile, evaporating surface is larger, is not easy to form hydrops in evaporating surface.The rapid evaporation of injection fluid in pipeline is applicable in various industrial circles, rapid evaporation especially suitable for SCR (selective catalytic reduction) reactor pre reduction agent (urea liquid), achieve the purpose that save required evaporation tubes length, to optimize the space layout of engine exhaust conduit.
Description
Technical field
In the rapid evaporation that the present invention relates to the reducing agents sprayed in SCR system in pipeline more particularly to a kind of pipeline
Hydrojet quick steaming unit belongs to the rapid evaporation neck of injection fluid in the rapid evaporation field pipeline of injection fluid in pipeline
Domain.
Background technology
SCR post-processing technologies are also known as emission aftertreatment technology, refer to causing environment dirty to reduce the exhaust gas of engine emission
It contaminates and the technology of proper treatment is carried out to it.SCR post-processing technologies have been widely used as a kind of method of denitrating flue gas,
Principle be reducing agent (urea liquid) reacted under the effect of the catalyst with the NOx (nitrogen oxides) in flue gas generate nitrogen and
Water.Wherein, the evaporation, decomposition of reducing agent and the blending state of reducing agent and exhaust gas are influence SCR system transformation efficiency one
Key factor.Abundant decomposition generally for reducing agent in guarantee SCR system needs to reserve longer discharge duct, reduces
SCR device, while higher requirement also proposed to the arrangement of SCR device.
Mainly two methods increase the rapid evaporation of hydrojet in pipeline, for SCR system, Yi Zhongshi in industry at present
Accelerate the evaporation, decomposition speed of urea by the evaporating temperature of reducing agent in increase, another kind is by mixer mixed process
The effect of middle air-flow and reducing agent increases the rapid evaporation of urea.Energy consumption needed for first way is higher, and system is more multiple
It is miscellaneous.And the second way, it is easier that reducing agent forms hydrops, corrosion pipeline inner wall on mixer surface.
Invention content
The purpose of the invention is to provide hydrojet quick steaming unit in a kind of pipeline, the apparatus structure is simple, can
Meet the requirement of hydrojet rapid evaporation in pipeline, and since Steaming structure is using annular so that hydrojet is not easy evaporating
Body structure surface gathers, to prevent the formation of hydrops.
The object of the present invention is achieved like this：Including pipeline, it is provided with injection site in pipeline, and sprays site and sets
Set in Way in, be additionally provided with the Steaming structure of tapered distribution in the pipeline by holder, and cone angle opening direction with
Liquid flow direction is consistent in pipeline, and the Steaming structure includes 3-7 group evaporation elements, and every group of evaporation element is circular ring shape knot
Structure, spherical structure, cirque structure and the combination of spherical structure or the combination of cirque structure and cirque structure.The present invention is also
Including some such structure features：
1. the holder is the cylindrical bar being symmetricly set between Steaming structure and pipeline, the number of cylindrical bar is 3 to 6
It is a.
2. the evaporation element has four groups, and it is first group of evaporation element successively to the 4th group of steaming along cone angle opening direction
Bill member, first group of evaporation element is spherical structure, and second group of evaporation element is cirque structure, third group be spherical structure with
The combination of cirque structure and cirque structure are located on the outside of spherical structure, the 4th group be two cirque structures combination.
Compared with prior art, the beneficial effects of the invention are as follows：1, annular is used in pipeline in hydrojet quick steaming unit
Structure so that evaporation process has the specific surface area of bigger, while the liquid of injection and wall surface being made to have the contact rate of bigger, from
And the liquid film being evenly distributed can be formed, be conducive to the rapid evaporation of drop.In addition, the excessive light of annular mixer knot surface shape
The phenomenon that sliding, the local hydrops of hydrojet can be effectively prevent in pipeline.2, annular is steamed in hydrojet quick steaming unit in pipeline
Donut number at the same section of structure is sent out with import to export direction gradually to increase, it is basic with the injection cone-shaped of drop
Agree with, the drop and surrounding flow for being conducive to injection quickly mix, while annular mixer annular is distributed as being staggered, and has
Conducive to the abundant shunting and diffusion of air-flow, to generate certain mixed effect.3, hydrojet quick steaming unit middle ring in pipeline
Shape Steaming structure surface shape is excessively round and smooth, when fluid flows through Steaming structure surface, fluid is made to form multilayer shunting, fluid velocity
Mutation rate it is smaller, therefore, when flowing through mixer manifold pressure loss it is smaller.4, in pipeline inside hydrojet quick steaming unit
Minor structure is convenient for actual processing, while ensureing flow field symmetry along conduit axis central symmetry.
Description of the drawings
Fig. 1 a are hydrojet quick steaming unit structure chart in pipeline proposed by the present invention, and Fig. 1 b, Fig. 1 c, Fig. 1 d are figure respectively
The sectional view in the direction A-A, B-B, C-C in 1a；
Fig. 2-3 is hydrojet quick steaming unit different visual angles schematic diagram in pipeline proposed by the present invention.
Fig. 4 is hydrojet quick steaming unit evaporating principle schematic diagram in circulating line proposed by the present invention.
In figure：1 pipeline, 2 injection sites, 3 Steaming structures, 4 holders.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, purport
For explaining the present invention, and it is not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be to be welded to connect；It can be directly connected, can also can be indirectly connected through an intermediary two elements
The interaction relationship of internal connection or two elements.It for the ordinary skill in the art, can be according to specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
The present invention includes specifically：Pipeline 1,1 side of the pipeline are equipped with entrance, and the separate inlet side is outlet；Institute
It states interior be equipped with of 1 entrance of pipeline and sprays site 2, liquid goes out to spray from injection site 2 (to be sprayed site 2 to be located inside mixing duct, fit
For the hydrojet rapid evaporation inside pipeline)；Steaming structure 3 is placed in the pipeline 1, and the Steaming structure 3 is whole in cone
Shape is distributed, and cone angle opening direction is consistent with flow direction in pipeline, and 3 inside of Steaming structure can be hollow or solid；The steaming
It is connected with holder 4 in hair structure 3.The holder 4 is connect with 1 inner wall of pipeline.Steaming structure includes 3-7 group evaporation elements, namely
Group number is 3-7, and ascending distribution, while the diameter of each annulus or spherical shape is integrally presented in each group evaporation element of Steaming structure
Reduce, distance increases between adjacent sets.
Donut number is not limited at certain same sections of loop configuration in hydrojet quick steaming unit in pipeline,
It can be arranged accordingly as needed, and arrange and do not meet in mixer and increase with pipeline flow direction number.
In pipeline between the adjacent fixing bracket of hydrojet quick steaming unit angle be 60 ° (six roots of sensation fixed frames), 90 ° (four
Root fixed frame), 120 ° (three fixed frames).Holder is in pipeline along the conduit axis central symmetry distribution present invention using in pipeline
Hydrojet quick steaming unit carries out the rapid evaporation of hydrojet (hydrojet is sprayed from hydrojet site), since annular Steaming structure is in pipeline
It is interior to be centrosymmetric distribution along pipe centerline, therefore, choose in pipeline that hydrojet is quick in section (such as Fig. 4) analysis conduit
Evaporating principle.Air-flow is flowed into from 1 entrance of pipeline, and air-flow is constantly layered and merges in pipeline 1 under the action of Steaming structure 3,
Liquid (injection is urea liquid in SCR mixers) is sprayed from injection site 2 simultaneously, and 3 table of Steaming structure is flowed through by air-flow drive
Face, the drop for being attached to 3 surface of Steaming structure is constantly evaporated decomposition, into fluid mass.By the effect of Steaming structure 3,
Drop evaporates the gas to be formed (in SCR injections, gas is ammonia) and constantly interlocks with stream air, mixes, and further promotes spray
The evaporation rate for the drop penetrated.So as to shorten the length of required evaporation tubes during Urea Evaporation, optimize SCR system
Space layout.
To sum up, the invention discloses hydrojet quick steaming units in a kind of pipeline, including：Pipeline 1,1 side of the pipeline
Equipped with entrance, the separate inlet side is outlet；It is equipped with injection site 2 in 1 entrance of the pipeline, liquid is from injection site 2
Go out to spray；Multigroup annular Steaming structure 3 is placed in the pipeline 1, and Steaming structure 3 is integrally conical distribution, cone angle opening
Direction is consistent with flow direction in pipeline, and 3 inside of Steaming structure can be hollow or solid；It is connected on the Steaming structure 3
Holder 4.The holder 4 is connect with 1 inner wall of pipeline；The configuration of the present invention is simple, flow resistance is small, meanwhile, evaporating surface is larger, no
Easily hydrops is formed in evaporating surface.The rapid evaporation of injection fluid in pipeline is applicable in various industrial circles, it is particularly suitable
In the rapid evaporation of SCR (selective catalytic reduction) reactor pre reduction agent (urea liquid), reaches and save required evaporation
The purpose of duct length, to optimize the space layout of engine exhaust conduit.
Claims (3)
1. hydrojet quick steaming unit in pipeline, including pipeline, it is characterised in that：It is provided with injection site in pipeline, and sprays
The Steaming structure that site setting is additionally provided with tapered distribution in Way in, the pipeline by holder is penetrated, and cone angle is opened
Mouth direction is consistent with liquid flow direction in pipeline, and the Steaming structure includes 3-7 group evaporation elements, and every group of evaporation element is round
Loop configuration, spherical structure, cirque structure and the combination of spherical structure or the combination of cirque structure and cirque structure.
2. hydrojet quick steaming unit in pipeline according to claim 1, it is characterised in that：The holder is arranged symmetrically
The number of cylindrical bar between Steaming structure and pipeline, cylindrical bar is 3 to 6.
3. hydrojet quick steaming unit in pipeline according to claim 1 or 2, it is characterised in that：The evaporation element has
Four groups, and be first group of evaporation element successively to the 4th group of evaporation element along cone angle opening direction, first group of evaporation element is
Spherical structure, second group of evaporation element are cirque structures, and third group is the combination of spherical structure and cirque structure and annulus
Shape structure is located on the outside of spherical structure, the 4th group be two cirque structures combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602817.4A CN108590826A (en) | 2018-06-12 | 2018-06-12 | Hydrojet quick steaming unit in pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810602817.4A CN108590826A (en) | 2018-06-12 | 2018-06-12 | Hydrojet quick steaming unit in pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108590826A true CN108590826A (en) | 2018-09-28 |
Family
ID=63623563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810602817.4A Pending CN108590826A (en) | 2018-06-12 | 2018-06-12 | Hydrojet quick steaming unit in pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590826A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009127451A (en) * | 2007-11-20 | 2009-06-11 | Osaka Gas Co Ltd | Fluid mixer and denitration device |
| JP2011111927A (en) * | 2009-11-25 | 2011-06-09 | Honda Motor Co Ltd | Exhaust emission control device of internal combustion engine |
| CN102631849A (en) * | 2012-04-17 | 2012-08-15 | 哈尔滨工程大学 | Pre-heating spray-hole type static mixer |
| CN103375230A (en) * | 2012-04-17 | 2013-10-30 | 福特环球技术公司 | Multi-tiered telescope shaped atomizer |
| CN103429864A (en) * | 2010-12-27 | 2013-12-04 | 波森公司 | Device for distributing fluids in exhaust systems |
| CN103623722A (en) * | 2013-11-29 | 2014-03-12 | 哈尔滨工程大学 | Dispersed streaming static mixer |
| US20150198073A1 (en) * | 2014-01-13 | 2015-07-16 | Caterpillar, Inc. | Exhaust aftertreatment system with in-elbow reductant injection |
| CN208281024U (en) * | 2018-06-12 | 2018-12-25 | 哈尔滨工程大学 | Hydrojet quick steaming unit in pipeline |
| CN208966393U (en) * | 2018-10-29 | 2019-06-11 | 中船动力研究院有限公司 | A kind of mixer and SCR system for SCR system |
| CN214809860U (en) * | 2021-03-16 | 2021-11-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
-
2018
- 2018-06-12 CN CN201810602817.4A patent/CN108590826A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009127451A (en) * | 2007-11-20 | 2009-06-11 | Osaka Gas Co Ltd | Fluid mixer and denitration device |
| JP2011111927A (en) * | 2009-11-25 | 2011-06-09 | Honda Motor Co Ltd | Exhaust emission control device of internal combustion engine |
| CN103429864A (en) * | 2010-12-27 | 2013-12-04 | 波森公司 | Device for distributing fluids in exhaust systems |
| CN102631849A (en) * | 2012-04-17 | 2012-08-15 | 哈尔滨工程大学 | Pre-heating spray-hole type static mixer |
| CN103375230A (en) * | 2012-04-17 | 2013-10-30 | 福特环球技术公司 | Multi-tiered telescope shaped atomizer |
| CN103623722A (en) * | 2013-11-29 | 2014-03-12 | 哈尔滨工程大学 | Dispersed streaming static mixer |
| US20150198073A1 (en) * | 2014-01-13 | 2015-07-16 | Caterpillar, Inc. | Exhaust aftertreatment system with in-elbow reductant injection |
| CN208281024U (en) * | 2018-06-12 | 2018-12-25 | 哈尔滨工程大学 | Hydrojet quick steaming unit in pipeline |
| CN208966393U (en) * | 2018-10-29 | 2019-06-11 | 中船动力研究院有限公司 | A kind of mixer and SCR system for SCR system |
| CN214809860U (en) * | 2021-03-16 | 2021-11-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
Non-Patent Citations (2)
| Title |
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