CN106468203A - A kind of SCR reductant nozzle - Google Patents
A kind of SCR reductant nozzle Download PDFInfo
- Publication number
- CN106468203A CN106468203A CN201510517837.8A CN201510517837A CN106468203A CN 106468203 A CN106468203 A CN 106468203A CN 201510517837 A CN201510517837 A CN 201510517837A CN 106468203 A CN106468203 A CN 106468203A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- connector
- section
- waste gas
- shower nozzle
- 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
Abstract
A kind of SCR reductant nozzle, it is installed in engine exhaust system, including a shower nozzle, one adapter, one connector, connector includes a separator, and connector is divided into waste gas section and air section by separator, waste gas section and air section are exposed to waste gas and in the air respectively, and the ratio L2/L1 of the axial direction characteristic size of described waste gas section and air section is less than 2/3.Hydro-joining successively between adapter, connector and shower nozzle, reducing agent from adapter can be without hindrance arrival shower nozzle and spray into engine exhaust system.
Description
Technical field
The invention belongs to engine exhaust post-processing technology field is and in particular to the liquid injection system of engine exhaust post processing, such as NOx selective catalysis reduce（SCR）System.
Background technology
For the vehicle with internal combustion engine as power, no matter for diesel engine or gasoline engine, the SCR technology for the pollutant such as NOx are carried out with catalytic treatment is very important pump-down process means.SCR technology needs to enter certain density aqueous solution of urea metered injection in diesel exhaust gas, resolves into ammonia by exhaust high temperature, enters SCR catalytic converter with aerofluxuss after mixing.
Injection measurement technology for liquid includes mouth end measurement technology and pump end measurement technology.Mouth end measurement technology is generally used for SCR neat liquid spraying system, and the exit position of nozzle is close to discharge duct wall, in case high-temperature damage nozzle.United States Patent (USP) US 2008/0087739 Al discloses a kind of pure nozzle for liquid of employing cyclone structure, and its injection metering relies on physical dimension and the machining accuracy of spray orifice.And for pump end measurement technology, the metering of liquid essentially consists in dosing pump, rather than the nozzle relying on injection.In most cases, liquid is sprayed into gas-liquid mixed chamber by the dosing pump of pump end metering, and the two-phase fluid in gas-liquid mixed chamber is sprayed in engine exhaust system by a kind of normally opened nozzle.When being sprayed with this normally opened nozzle, in order to SCR reducing agent can be sufficiently mixed with waste gas, and the crystallization leading to after avoiding as far as possible being rebuffed, the spray orifice of usual nozzle is deeply to exhaustor near center location.Although this design may take various provision for thermal insulations, when thermal balance reaches, nozzle interior still has higher temperature, and now, urea crystals are under some operating modes than more serious.
Additionally, for the nozzle of loose structure, in order to obtain reasonable atomizing effect, it is smaller that spray orifice designs, when nozzle interior temperature improves, urea crystals granule is easy to block spray orifice.Another problem of jet rose is that spray orifice is connected with an inner space, and the unstability of flowing can lead to spray between spray orifice uneven randomness.
Content of the invention
The present invention is directed to the problems referred to above, purpose be to provide a kind of it can be avoided that nozzle interior is overheated, lead to the situation crystallizing even plug nozzle to occur.
For achieving the above object, the present invention takes technical scheme below：A kind of SCR reductant nozzle, including a shower nozzle, an adapter, a connector.Described shower nozzle and connector are arranged coaxially or at an angle, and are fixed by modes such as welding.Described connector and adapter are coaxially arranged, again may be by welding or mechanical system is realized connecting.Adapter, connector and shower nozzle hydro-joining successively, reducing agent from adapter can be without hindrance arrival shower nozzle spraying into engine exhaust system mix with exhaust stream, carry out vent gas treatment.
Described connector includes a separator, and separator can be fixed on connector by welding manner, and nozzle is fixed on discharge duct by separator, is positioned by keeper, and is locked by modes such as screw threads.Connector is divided into waste gas section and air section by separator, and waste gas section and air section are exposed to waste gas and in the air respectively.The ratio 2/3 that the axial direction characteristic size of the waste gas section of described connector and air section is less than, to reduce the contact area with high-temperature exhaust air stream, avoid that nozzle temperature is too high to lead to reducing agent crystallize or damage, simultaneously from separator and with the Btu utilization air section radiating that hypomere is derived, reduce heat conduction.
Further, described shower nozzle includes a cyclone and a spray orifice, and described cyclone includes eddy flow road.Reducing agent passes through the eddy flow road of cyclone and spray orifice atomization sprays in the exhaust pipe of engine.
Further, the injection direction of described spray orifice and the angle of the main flow direction of engine exhaust are less than 60 °, are so meeting guarantee nozzle demand easy for installation while injection reducing agent is sufficiently mixed with aerofluxuss.
Above-mentioned spray orifice direction is embodied as being that described waste gas section includes one section of bending tube, shower nozzle is realized by being fixed on trisection curved pipe；Or can be that described shower nozzle carries certain angle, shower nozzle is fixed on connector and realizes.
Above-mentioned, reductant nozzle includes a snap joint, a keeper being located at separator.It is connected with feed flow end by described quick union, quick union is to meet the modular connection of SAE J2044 or docking style can also be snap-type.Described keeper axis and shower nozzle axis are generally aligned in the same plane, and keeper can embed in the locating slot of discharge duct, prevent nozzle to be subject to external force effect to rotate or tilt.
A kind of After-treatment technics SCR system applying described reductant nozzle, including a hybrid chamber being arranged at described reductant nozzle upstream, reducing agent and gases at high pressure form gas-liquid multiphase mixing interflow in described mixing intracavity, spray into the exhaust pipe of engine subsequently into described nozzle atomization.
With reference to the accompanying drawings and detailed description the present invention is described in further detail.
Brief description
One of example structure schematic diagram of SCR reductant nozzle that Fig. 1 provides for the present invention.
The two of the example structure schematic diagram of the SCR reductant nozzle that Fig. 2 provides for the present invention.
The three of the example structure schematic diagram of the SCR reductant nozzle that Fig. 3 provides for the present invention.
The four of the example structure schematic diagram of the SCR reductant nozzle that Fig. 4 provides for the present invention.
The application examples structural representation of the SCR system of the SCR reductant nozzle that Fig. 5 provides for the present invention.
Specific embodiment
As shown in figure 1, one of example structure schematic diagram of SCR reductant nozzle providing for the present invention, a kind of SCR reductant nozzle 9 includes a shower nozzle 5, an adapter 2, a connector 1.Adapter 2, connector 1 and shower nozzle 5 hydro-joining successively, reducing agent from adapter 2 can be without hindrance arrival shower nozzle 5 and spray into engine exhaust system（In figure is not shown）Mix with exhaust stream, carry out vent gas treatment.Described shower nozzle 5 and connector 1 and connector 1 and adapter 2 can be connected by modes such as close-fitting or welding.
Described shower nozzle 5 includes cyclone 13 and the flat board 6 with spray orifice 8.Described cyclone 10 is overall to be in tetragonal prism, and face is provided with a rotator shaped spin chamber 11 and a tangential runner 12 tangent with spin chamber 11 edge at one end, and other end is provided with the radial flow path 13 at connection center and periphery.Described shower nozzle 5 is the open structure in a front end, and described cyclone 13 and flat board 6 are inserted from the front end of shower nozzle 5 successively, and fastens cyclone 13 and flat board 6 by way of flat board 6 with the welding of shower nozzle 5 front end.
Described adapter 2 is a snap joint, meets SAE J2044 standard.Described nozzle connector 2 and liquid feed device（In figure is not shown）Patch connection, realize the transmission of working solution.Described connector 1 includes a separator 3, separator 3 is welded on connector 1, connector 1 is divided into waste gas section 1b and air section 1a, waste gas section 1b and air section 1a are exposed to waste gas and in the air respectively, the ratio L2/L1 of the axial length dimension of waste gas section 1b of described connector 1 and air section 1a is less than 2/3, to reduce the contact area with waste gas section 1b with high-temperature exhaust air stream, air section 1a is contacted with the external world and carries out conduction of heat simultaneously, plays heat-blocking action.Described separator 3 is provided with a keeper 4.Described keeper 4 axis 4a is generally aligned in the same plane with the axis 5b of shower nozzle 5, and keeper 4 can embed in the locating slot of discharge duct（In figure is not shown）, prevent nozzle 9 acted on by external force and rotate or tilt.
As shown in Fig. 2 the two of the example structure schematic diagram of the SCR reductant nozzle providing for the present invention, one of the present embodiment structure and difference of structure of first embodiment are：Described adapter 2 is a snap joint, including lip 2a, by the other end locking of lip 2a and adapter 2.Adapter 2 meets SAE J2044 standard.The present embodiment structure is with the two of the difference of the structure of first embodiment：Waste gas section 1b of described connector 1 includes one section of bending, and described shower nozzle 5 is fixed on bending section, so that the axis direction 5b of shower nozzle 5 and connector air section 1a axis 1c direction are at an angle, so when nozzle 9 passes through that separator 3 is vertical and discharge duct（In figure is not shown）During installation, spraying center position with discharge directions at an angle, typically takes less than 60 ° of angles.Meanwhile, still meet the requirement that the ratio of waste gas section 1b of connector 1 and the axial length dimension of air section 1a is less than 2/3.The present embodiment structure is with the three of the difference of the structure of first embodiment：Described shower nozzle 5 includes at least one spray orifice 8, described spray orifice 8 directly design with shower nozzle 5 on.
As shown in figure 3, the three of the example structure schematic diagram of the SCR reductant nozzle providing for the present invention, including a cyclone 10 and a flat board 6 with spray orifice 8, shower nozzle 5 is the open structure in a front end.Described cyclone 13 and the flat board 6 with spray orifice 8 are inserted from the front end of shower nozzle 5 successively, then pass through collar 7 and lip 6 is connected.
As shown in figure 4, the 3rd embodiment structural representation of the SCR reductant nozzle providing for the present invention, the present embodiment structure is with the difference of the structure of second, third embodiment：Described shower nozzle 5 includes connector 1 connecting hole 5c and flat board 6 installing hole 5d, there is certain angle in connecting hole 5c and installing hole 5d, can be realized by machining mode so that when nozzle 9 is installed on discharge duct, its spray direction and discharge directions still keep certain angle.Described shower nozzle 5 includes a matched back-off 5d, and cyclone 10 and flat board 6 are fixed by back-off 5d.
The application examples structural representation of the SCR system of the SCR reductant nozzle that Fig. 5 provides for the present invention.Diagram includes a urea tank 15, a liquid feed metering pump 17, a gas-liquid mixed chamber 20, a pneumatic supply 16, a reductant nozzle 9.Described pneumatic supply 16 is connected with gas-liquid mixed chamber 20 by inlet channel 16a, and described liquid feed metering pump 17 is fixedly arranged in urea tank 21, and metered injection liquid is sprayed into gas-liquid mixed chamber 20 by the delivery valve 17a of liquid feed metering pump 17, mixes with compressed air therein.Above-mentioned pneumatic supply 16 can be the air inlet after intercooler.The output in described gas-liquid mixed chamber 20 leads to nozzle 9 by heterogeneous fluid conduit 23, and described conduit 23 is connected by adapter 2 with nozzle 9, and described adapter 2 can be jacket-type quick union, as shown in Figure 1.Gas-liquid mixed chamber 20 can directly be arranged at the delivery valve 17a of liquid feed metering pump 17, in urea tank 15 it is also possible to extend to urea tank together with delivery valve 17a outside, such delivery valve 17a is connected by pressure piping with metering ejector pump 17 intermediate demand.
Described reductant nozzle 9 is installed on engine exhaust conduit 24, can connect locking by screw thread etc. after separator 3 is fixing.Spray orifice 8 injection direction of nozzle 9 is complementary with shower nozzle 5 bending angle with exhaust stream 25 angular separation.The connector 1 of described reductant nozzle 9 and shower nozzle 5 can also be coaxially arranged, as shown in figure 1, can tilt to be installed on engine exhaust conduit 24 for this structure nozzle, to meet spraying 26 and the well-mixed demand of aerofluxuss 25.
The work process of the SCR application system of described reductant nozzle is as follows.
In urea tank 15, liquid, due to deadweight, enters liquid feed metering pump 17 through filter 22.Described liquid feed metering pump 17 produces quantitative high-pressure liquid, and hydraulic fluid is sprayed into by gas-liquid mixed chamber 20 by delivery valve 17a, with wherein mixed by the gases at high pressure that inlet channel 16a enters, heterogeneous fluid reaches reductant nozzle 9 by delivery conduit 23, spray in the exhaust pipe of engine 24 by nozzle 9 atomization, mix with aerofluxuss 25, be exhausted process.
After post processing task terminates, air source 16 to clean the middle remnants urea liquid including pipeline at gas-liquid mixed chamber 20 to nozzle 9, can be prevented urea liquid from freezing or crystallization separate out, cause system injury with time-delay closing.
The SCR reductant nozzle that the present invention provides and other are all belonged within the scope of present invention disclosure and protection based on the further scheme of spirit of the invention.
Claims (7)
1. a kind of SCR reductant nozzle, it is installed in engine exhaust system, including a shower nozzle, an adapter, a connector, connector includes a separator, connector is divided into waste gas section and air section by separator, and waste gas section and air section are exposed to waste gas and in the air respectively, hydro-joining successively between adapter, connector and shower nozzle, reducing agent from adapter can be without hindrance arrival shower nozzle and spray into engine exhaust system it is characterised in that：The ratio of the axial direction characteristic size of waste gas section and air section is less than 2/3.
2. SCR reductant nozzle as claimed in claim 1 it is characterised in that：Described shower nozzle includes a cyclone and a spray orifice, and reducing agent passes through cyclone and spray orifice atomization sprays into the exhaust pipe of engine.
3. SCR reductant nozzle as claimed in claim 2 it is characterised in that：Described shower nozzle is fixed on connector, and the injection direction of described spray orifice is less than 60 degree with the angle of the main flow direction of engine exhaust.
4. SCR reductant nozzle as claimed in claim 3 it is characterised in that：Described waste gas section includes one section of bending tube, and spray orifice injection direction is consistent with the wrap direction of bending tube.
5. the SCR reductant nozzle as described in claim 1-4 it is characterised in that：Described adapter is a snap joint, and described snap joint meets SAE J2044.
6. SCR reductant nozzle as claimed in claim 4 it is characterised in that：Described separator includes a keeper so that spray orifice is towards determination.
7. a kind of application claim 1 to 6 arbitrary described reductant nozzle After-treatment technics SCR system it is characterised in that：The upstream of described reductant nozzle is provided with a hybrid chamber, reducing agent and gases at high pressure form gas-liquid multiphase mixing interflow in described mixing intracavity, spray into the exhaust pipe of engine subsequently into described nozzle atomization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510517837.8A CN106468203A (en) | 2015-08-23 | 2015-08-23 | A kind of SCR reductant nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510517837.8A CN106468203A (en) | 2015-08-23 | 2015-08-23 | A kind of SCR reductant nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106468203A true CN106468203A (en) | 2017-03-01 |
Family
ID=58229649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510517837.8A Pending CN106468203A (en) | 2015-08-23 | 2015-08-23 | A kind of SCR reductant nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106468203A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB933264A (en) * | 1959-04-27 | 1963-08-08 | Nils Finn Bisgaard | Improvements in and relating to a method for the production of foam material, and a mixing apparatus for carrying out the said method |
| EP0886043A1 (en) * | 1997-06-21 | 1998-12-23 | Robert Bosch Gmbh | Mixture delivery device |
| CN101048580A (en) * | 2004-10-29 | 2007-10-03 | 日产柴油机车工业株式会社 | Liquid reducing agent injection nozzle |
| US20080022663A1 (en) * | 2006-07-26 | 2008-01-31 | Dodge Lee G | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
| CN202325774U (en) * | 2011-11-24 | 2012-07-11 | 东风汽车有限公司 | Automobile urea aqueous solution nozzle |
| CN102748106A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN102748105A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN203565435U (en) * | 2013-10-29 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Self-cleaning device of gas suction pipeline |
| CN204024777U (en) * | 2014-06-26 | 2014-12-17 | 陈庆东 | A kind of urea nozzle |
| CN204193788U (en) * | 2014-11-06 | 2015-03-11 | 河北大唐国际张家口热电有限责任公司 | A kind of SCR sprays ammonia blender automatically |
| CN204357539U (en) * | 2014-12-05 | 2015-05-27 | 天津思凯汽车环保科技有限公司 | Gas auxiliary internal-combustion engine SCR is with the shower nozzle of atomizing effect |
| CN204402627U (en) * | 2014-09-18 | 2015-06-17 | 浙江福爱电子有限公司 | A kind of engine exhaust reprocessing multiphase flow jetstream whirl nozzle |
| CN204572139U (en) * | 2015-04-27 | 2015-08-19 | 十堰市倍力汽车管业有限公司 | A kind of automobile SCR system urea feedway |
| CN204572142U (en) * | 2015-04-27 | 2015-08-19 | 十堰市倍力汽车管业有限公司 | A kind of effectively insulating urea nozzle device |
| CN205422892U (en) * | 2015-08-23 | 2016-08-03 | 浙江福爱电子有限公司 | Engine aftertreatment SCR system of SCR reductant nozzle and applied this reductant nozzle |
-
2015
- 2015-08-23 CN CN201510517837.8A patent/CN106468203A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB933264A (en) * | 1959-04-27 | 1963-08-08 | Nils Finn Bisgaard | Improvements in and relating to a method for the production of foam material, and a mixing apparatus for carrying out the said method |
| EP0886043A1 (en) * | 1997-06-21 | 1998-12-23 | Robert Bosch Gmbh | Mixture delivery device |
| CN101048580A (en) * | 2004-10-29 | 2007-10-03 | 日产柴油机车工业株式会社 | Liquid reducing agent injection nozzle |
| US20080022663A1 (en) * | 2006-07-26 | 2008-01-31 | Dodge Lee G | System and method for dispensing an aqueous urea solution into an exhaust gas stream |
| CN202325774U (en) * | 2011-11-24 | 2012-07-11 | 东风汽车有限公司 | Automobile urea aqueous solution nozzle |
| CN102748105A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN102748106A (en) * | 2012-07-03 | 2012-10-24 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure of urea nozzle |
| CN203565435U (en) * | 2013-10-29 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Self-cleaning device of gas suction pipeline |
| CN204024777U (en) * | 2014-06-26 | 2014-12-17 | 陈庆东 | A kind of urea nozzle |
| CN204402627U (en) * | 2014-09-18 | 2015-06-17 | 浙江福爱电子有限公司 | A kind of engine exhaust reprocessing multiphase flow jetstream whirl nozzle |
| CN204193788U (en) * | 2014-11-06 | 2015-03-11 | 河北大唐国际张家口热电有限责任公司 | A kind of SCR sprays ammonia blender automatically |
| CN204357539U (en) * | 2014-12-05 | 2015-05-27 | 天津思凯汽车环保科技有限公司 | Gas auxiliary internal-combustion engine SCR is with the shower nozzle of atomizing effect |
| CN204572139U (en) * | 2015-04-27 | 2015-08-19 | 十堰市倍力汽车管业有限公司 | A kind of automobile SCR system urea feedway |
| CN204572142U (en) * | 2015-04-27 | 2015-08-19 | 十堰市倍力汽车管业有限公司 | A kind of effectively insulating urea nozzle device |
| CN205422892U (en) * | 2015-08-23 | 2016-08-03 | 浙江福爱电子有限公司 | Engine aftertreatment SCR system of SCR reductant nozzle and applied this reductant nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1712753B1 (en) | Module and method for introducing a urea solution into the exhaust gas of an engine | |
| FI126692B (en) | A device for introducing fluid into the exhaust stream and an exhaust aftertreatment system | |
| US9657620B2 (en) | Exhaust gas system | |
| US9512767B2 (en) | Exhaust aftertreatment device | |
| JP6082968B2 (en) | Method of administering urea-based reducing agent to an exhaust gas stream | |
| US9964016B2 (en) | Exhaust gas aftertreatment device | |
| US20150361849A1 (en) | In-line decomposition reactor pipe with exhaust assist | |
| CN205422892U (en) | Engine aftertreatment SCR system of SCR reductant nozzle and applied this reductant nozzle | |
| CN105722586B (en) | Device for mixing liquid medium with gas stream | |
| RU2560122C2 (en) | Dispensing module for dosed feed of urea-based reducing agent to exhaust gas flow | |
| CN110431289B (en) | Exhaust system | |
| CN106150612A (en) | Gas jet type adds blue combined jet device and application thereof | |
| CN107916973B (en) | SCR urea sprays protection system | |
| CN105604652B (en) | Method for operating a device for the exhaust gas aftertreatment of an internal combustion engine and corresponding device | |
| CN106014580A (en) | Novel urea crystallization-prevention exhaust pipe used for diesel engine SCR system | |
| CN210317450U (en) | Tail gas aftertreatment device | |
| CN201982159U (en) | Gas-liquid mixing device of urea metering pump of SCR (selective catalyst reaction) system | |
| CN106468203A (en) | A kind of SCR reductant nozzle | |
| CN108150255B (en) | Treating fluid mixing device for vehicle tail gas treatment | |
| CN106121783A (en) | A kind of air mixing atomizing nozzle of SCR | |
| US10823034B1 (en) | Exhaust system mixer | |
| CN207634148U (en) | A kind of SCR urea injection protection system | |
| CN110761878A (en) | Box type integrated urea nozzle post-processor assembly | |
| CN107939488B (en) | Urea mixing device for treating vehicle tail gas | |
| CN103422952A (en) | Integrated semiconductor control rectifier (SCR) system for automobile |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170301 |
|
| RJ01 | Rejection of invention patent application after publication |