CN105986863A - Swirl nozzle for exhaust aftertreatment - Google Patents
Swirl nozzle for exhaust aftertreatment Download PDFInfo
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- CN105986863A CN105986863A CN201510079077.7A CN201510079077A CN105986863A CN 105986863 A CN105986863 A CN 105986863A CN 201510079077 A CN201510079077 A CN 201510079077A CN 105986863 A CN105986863 A CN 105986863A
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- swirl nozzle
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Abstract
A swirl nozzle for exhaust aftertreatment comprises a nozzle body, a swirl flow core and an orifice plate. The swirl flow core comprises a swirl flow chamber in a rotary body shape and at least one runner tangent to the edge of the swirl flow chamber. The orifice plate comprises an orifice. The swirl flow core and the orifice plate are combined in the nozzle body to form the swirl flow chamber and the tangential runner. The swirl flow chamber is located in the nozzle body. The orifice is located in the center of the swirl flow chamber. The ratio SI of the total flow area of the tangential runner to the flow area of the orifice ranges from 0.75 to 1.5. When the SI is smaller than 1, the flow of the swirl nozzle is determined by the flow area of the tangential runner. Otherwise, when the SI is larger than 1, the flow of the swirl nozzle is determined by the flow area of the orifice.
Description
Technical field
The invention belongs to engine exhaust post-processing technology field, be specifically related to the liquid injection system of engine exhaust post processing, including NOx selective catalysis reduction (SCR) system and the regeneration fuel oil spraying system of Particulate Filter (DPF).
Background technology
In the face of the environmental issue of world's common recognition, energy-saving and emission-reduction have become as the endless requirement of vehicle and electromotor.To this, the vehicle with internal combustion engine as power needs to install discharge post-treatment system in the hope of meeting emission request.Such as, it being currently used primarily in the SCR(Selective Catalytic Reduction that the pollutant such as NOx in diesel motor exhaust are carried out catalytic treatment) technology etc. has become as the technology that diesel vehicle etc. must use, and control the Particulate Filter (DPF=Diesel of diesel particulate discharge
Particulate Filter) also will become the technology that must use.
SCR technology needs (to be also diesel exhaust gas treatment fluid DEF=Diesel Exhaust Fluid by the aqueous solution of urea of such as 32.5% weight concentration, or adding blue liquid AdBlue) metered injection enters in diesel exhaust gas, resolve into ammonia by exhaust high temperature, after mixing with aerofluxus, enter SCR catalytic converter.Under the effect of catalyst, ammonia will be with the NO in engine exhaustxDeng there is catalytic reduction reaction, make NOxIt is decomposed into harmless N2、H2O, it is therefore desirable to the SCR metered injection atomising device that precision is higher.
Existing SCR spraying system, gentle the helping of neat liquid atomization substantially can be divided into be atomized two kinds, the geometric parameter of nozzle is set very sensitive by the metering of neat liquid atomization, generally porous type and two kinds of structures of swirl nozzle, and gas helps atomization generally to use porous atomization more, problem appear to is that injection is uneven and easy and be rebuffed.United States Patent (USP) US 2008/0087739 Al discloses a kind of vortex atomizing nozzle, and main application is neat liquid injection, and injection metering relies on physical dimension and the machining accuracy of spray orifice.
Helping atomizing type for gas, the metering of liquid is primarily not the nozzle relying on injection, and is dosing pump, and in this case, it is atomization characteristics that nozzle designs principal element to be considered, and non-metering.
Atomization characteristics refers mainly to atomizing particle size, the distribution of sizes of particle diameter, the spatial distribution etc. of atomization.Bigger on atomization characteristics impact is the eddy flow degree of nozzle, and the eddy flow degree of nozzle is directly related with the ratio of nozzle bore area with the circulation area of tangential runner.If measured and limited flow rate by the physical dimension of spray orifice, then spray characteristics cannot obtain optimizing design, and the advantage of swirl nozzle cannot play completely.
Particulate matter in the engine exhaust that DPF system is collected, if do not disposed, will block DPF and engine exhaust system.Process one of technology of particulate matter of collecting of DPF, it is simply that by intermittently making delivery temperature raise further, subsequently into DPF to engine exhaust injection fuel oil so that it is in particulate matter burning.Therefore, similar with SCR system, the injection of regeneration fuel oil, it is also desirable to wellatomized liquid spray, the structure design of nozzle is the most crucial.
Summary of the invention
The present invention is directed to the problems referred to above, purpose be to provide a kind of can regulate atomization characteristics, be prone to dispel the heat easy for installation, for the injection of SCR aqueous solution of urea and the After-treatment technics swirl nozzle of dpf regeneration fuel injection.
For achieving the above object, the present invention takes techniques below scheme: a kind of exhaust aftertreatment swirl nozzle, including a nozzle body, one is positioned at the spin chamber among nozzle body, one spray orifice being positioned at center, spin chamber, at least one tangential runner, it is characterised in that the ratio of total circulation area of described tangential runner and the circulation area of spray orifice is between 0.75-1.5.
The circulation area of tangential runner is very bigger than the eddy flow degree impact before the injection of SI convection cell with spray orifice circulation area, and eddy flow degree will directly affect atomization characteristics.SI is the biggest, and the angle of injection is the least, and the uniformity of granule is the best, otherwise, SI is the least, and the angle of injection is the biggest, and bulky grain drop is the most obvious with the region disconnecting of little particle droplet, and bulky grain is distributed in the periphery of mist cone.According to experimental observation, when SI is less than 0.75, fog horn is excessive, and bulky grain drop can splash to surrounding, is unfavorable for the chemical reaction that post processing is carried out；And SI more than 1.5 time, spray cone angle is too small, and mean diameter (such as SMD) is the biggest, thus loses the effect known clearly by swirling flow atomizing and diffusion.SI exceedes above-mentioned two marginal value, all can lose the using value in After-treatment technics sprays, be not always the case SCR and DPF system.
Further, technique scheme can include an eddy flow core and jet orifice plate, eddy flow core includes a rotator shaped spin chamber and at least one groove tangent with edge, spin chamber, and jet orifice plate includes spray orifice, and eddy flow core is combined with jet orifice plate among nozzle body and forms spin chamber and tangential runner.
<when 1, the flow of swirl nozzle is determined SI by the circulation area of tangential runner, and otherwise, during SI>1, the flow of swirl nozzle is determined by the circulation area of spray orifice.
The geometry of above-mentioned spray orifice can be a cylinder, it is possible to being an annular space, be made up of a revolution space and rotary body, rotation position is in the center of revolution space.The most concrete a kind of design is: include an eddy flow core and jet orifice plate, eddy flow core includes a rotator shaped spin chamber and at least one groove tangent with edge, spin chamber, jet orifice plate includes a revolution space, described rotary body is fixed on eddy flow core, and eddy flow core is combined formation spin chamber, tangential runner and spray orifice with jet orifice plate.Described rotary body axially can adjust to form different and atomization characteristics with the relative position of revolution space.
Further, described rotary body includes a tapered distal end, and revolution space includes that a cone space, tapered distal end form an annular spray orifice expanded outwardly with cone space.
The nozzle body front end of technique scheme can open, eddy flow core is inserted from nozzle body front end, eddy flow core is fixed by the connection between jet orifice plate and nozzle body, connection can be by directly welding realization by jet orifice plate with nozzle body, can also be by the mechanical pressure riveted of nozzle body with jet orifice plate be realized, this is dress mode before one.
Further, including a snap joint, a thermal insulation barriers, described thermal insulation barriers connects nozzle body and snap joint.Described thermal insulation barriers can be a metal elongated tubular, or light-wall pipe, it is also possible to be a ceramic thermal insulation pipe, and thermal insulation barriers can be as a part for fluid delivery pipeline.
Further scheme is, jet orifice plate and nozzle body are designed as one, and nozzle body rear end is open, is inserted from nozzle body rear end by eddy flow core, fixes eddy flow core by the connection between nozzle body and thermal insulation barriers, and this is dress mode after one.
The design of a kind of practicality is: described snap joint meets SAE J2044.
In order to reduce the temperature of nozzle body, such scheme can include one and the close-connected heat exchanger of nozzle body, is taken in air by the heat of nozzle body by heat convection and heat radiation mode.Described heat exchanger can be the metallic object containing fin, alloy aluminum or other metal material manufacture.
A kind of After-treatment technics SCR system comprising above-mentioned engine exhaust post processing swirl nozzle, this system includes nitrogen oxide reduction SCR catalyst and hush pipe, described exhaust aftertreatment swirl nozzle is arranged in the upstream of hush pipe, described SCR catalyst is between two hush pipes, to such an extent as to aqueous solution of urea is injected directly in the hush pipe of upstream, to be conducive to reducing the space required for carbamide decomposes.
It is characterized in that, be provided with a hybrid chamber, aqueous solution of urea and gases at high pressure in the upstream of described swirl nozzle in described hybrid chamber, form gas-liquid multiphase mixing interflow, spray into the exhaust pipe of engine subsequently into described swirl nozzle.
The another kind of After-treatment technics dpf regeneration system applying above-mentioned engine exhaust post processing swirl nozzle, it is provided with a hybrid chamber in the upstream of described swirl nozzle, fuel oil and gases at high pressure form gas-liquid multiphase mixing interflow in described hybrid chamber, spray into the exhaust pipe of engine subsequently into described swirl nozzle.
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
The embodiment schematic diagram of the swirl nozzle muzzle-loading structure that Fig. 1 provides for the present invention.
The embodiment schematic diagram of the swirl nozzle Rear mounted structure that Fig. 2 provides for the present invention.
Fig. 3 contains the embodiment schematic diagram of heat spreader structures for the swirl nozzle that the present invention provides.
Fig. 4 a
SI is close to swirl nozzle atomizing characteristics explanation when 0.75.
Fig. 4 b
SI is close to swirl nozzle atomizing characteristics explanation when 1.5.
The SCR gas that Fig. 5 comprises the swirl nozzle that the present invention provides helps spraying system schematic diagram.
Fig. 6 comprises the dpf regeneration spraying system schematic diagram of the swirl nozzle that the present invention provides.
Specific embodiment
As it is shown in figure 1, the example structure schematic diagram of the swirl nozzle muzzle-loading structure provided for the present invention, including eddy flow core 3, jet orifice plate 8, nozzle body 9, locking nut 10, instlated tubular 11, fast plug 12.
Described eddy flow core 3 entirety is tetragonal prism, and at one end face is provided with a rotator shaped spin chamber 1 and a tangential runner 2 tangent with edge, spin chamber 1, and other end is provided with connection center and peripheral radial flow path 15.Jet orifice plate 8 is a plectane, and its center is provided with the column shaped rotating space as spray orifice 5.
Above-mentioned, nozzle body 9 is front end open type structure, eddy flow core 3 and jet orifice plate 8 are inserted from nozzle body 9 front end successively, and jet orifice plate 8 is close to eddy flow core 3 and is provided with spin chamber 1 and the end face of tangential runner 2, then by collar 7 and is connected fixing by crimped for the lip 6 holding nozzle body 9 tightly.Fixed form can also be by directly welding realization by jet orifice plate 8 with nozzle body 9.
Described instlated tubular 11 one end is inserted in nozzle body 9 in close-fitting mode, or is fixed as one with nozzle body 9 by modes such as welding, and its end face compresses eddy flow core 3 and is provided with the one side of radial flow path 15.And the other end and a snap joint 12 are tightly connected (by the way of welding or press-in), and installation locking nut 10 is limited between nozzle body 9 and snap joint 12.Snap joint 12 meets SAE J2044 standard.The temperature of length snap joint to be ensured 12 end of instlated tubular 11 can not exceed the license of snap joint 12 and use temperature because of the high temperature of nozzle body 9 end.The general length of instlated tubular 11 is greater than 8 with the ratio of its external diameter.Instlated tubular 11 can use metal or ceramic making.Eddy flow core 3 can use pottery, plastics or metal to make, and uses the techniques such as die cast metal molding, or ceramic post sintering molding, or powder metallurgy sintered molding, or plastic hot is molded, injection-moulding plastic.
Above-mentioned eddy flow core 3 is combined nozzle body 9 and forms spin chamber 1 and tangential runner 2 with jet orifice plate 8, the swirl nozzle runner so formed will enable flow through the radial flow path 15 that instlated tubular 11 flows on eddy flow core 3, enter the shaft orientation flowing channel 14 that the cylinder side plane of eddy flow core 3 is formed, then flow into spin chamber 1 by tangential runner 2.Because fluid fed tangentially enters, in spin chamber 1, just form fluid eddy flow.Because cylindrical spray orifice 5 connects with the center of spin chamber 1, constitute bigger spin chamber 1, spray from spray orifice 5 so fluid just rotates.Because the fluid area ratio of the circulation area of tangential runner 2 and spray orifice 5 is between 0.75 ~ 1.5, so the strength of vortex in spin chamber 1 is relatively strong, ejection liquid atomization characteristics is good.As shown in fig. 4 a, if the actual internal area of tangential runner 2 is A, the circulation area size of spray orifice 5 is B.Note, tangential runner 2 circulation area is with the ratio SI=A/B, SI of spray orifice 5 circulation area time the least (close to 0.75), and spraying 29a angle presentation is the biggest, and bulky grain drop is the most obvious with the region disconnecting of little particle droplet, and bulky grain is distributed in the periphery of mist cone.Otherwise, as shown in Figure 4 b, when SI the biggest (close to 1.5), spraying 29b angle presentation is the least, and the uniformity of granule is the best.
When the mixing multiphase flow that the fluid flowing into instlated tubular 11 is compressed air and liquid, the liquid that density is bigger is evenly distributed on the periphery of spin chamber 1 the most more, air-flow drives liquid after spray orifice 5 sprays, liquid is initially formed liquid film, and it is more and more thinner, finally being broken into fine drop, form spraying, compressed air can arrive cooling nozzle and the purpose of cleaning simultaneously.
Swirl nozzle shown in Fig. 1, can be fixed on the tube wall of injection target by locking nut 10, can keep sealing by gasket seal 4, such as, be fixed on the exhaust wall of Diesel engine.Meanwhile, pad 4 also plays heat insulation effect.
Fig. 2 show the Rear mounted constructive embodiment schematic diagram of swirl nozzle that the present invention provides, and one of its difference with Fig. 1 is: is i.e. provided with spin chamber 21 and tangential runner 2 on eddy flow core 3a, is also provided with inclined flow passage 23.The present embodiment is with the two of the difference of Fig. 1: described spray orifice 5 is directly processed on nozzle body 24 by the present embodiment.Described nozzle body 24 includes a part spin chamber 25, and cylinder spray orifice 5 is positioned at the downstream of part spin chamber 25.The three of the difference of the present embodiment and Fig. 1 are: nozzle body 24 is rear end open architecture, eddy flow core 3a is inserted from nozzle body 24 rear end, eddy flow core 3a is fixed by the connection between nozzle body 24 and thermal insulation barriers 11, connection can make spin chamber 21 coaxially merge the total spin chamber of formation with part spin chamber 25 by modes such as welding simultaneously.The four of the difference of the present embodiment and Fig. 1 are: fast plug is a mother socket 12a.
Swirl nozzle shown in Fig. 3 containing heat spreader structures schematic diagram, the present embodiment is with one of difference of Fig. 1 or Fig. 2: include the fixing seat 26 of a heat exchanger 26a.Heat exchanger 26a and nozzle body 27 compact siro spinning technology, taken to the heat of nozzle body 27 in air by heat convection and heat radiation mode.Described heat exchanger 26a is the metallic object containing fin, alloy aluminum or other metal material manufacture.The present embodiment is with the two of the difference of Fig. 1 or Fig. 2: described nozzle body 27 includes a revolution space 22.Spray orifice 5 is an annular space, is made up of revolution space 22 and a rotary body 28, and rotary body 28 is positioned at the center of revolution space 22, and is fixed on eddy flow core 3b.Described rotary body 28 includes tapered distal end 28a, and revolution space 22 includes that a cone space 22a, tapered distal end 28a form an annular spray orifice expanded outwardly with cone space 22a.Described rotary body 28 axially can adjust to form different and atomization characteristics with the relative position of revolution space 22.
Fig. 5 is a kind of engine emission post processing SCR system schematic diagram applying swirl nozzle of the present invention, including hybrid reaction module 30 and metered injection module 31.Its hybrid reaction module includes exhaustor 34, catalytic converter 35, swirl nozzle 36, temperature sensor 37 and NOx or ammonia gas sensor 38.
Described catalytic converter 35 comprises one section of mixing duct 34a and is positioned at mounting flange 34b, 34c of both ends of the surface.Mixing duct 34a includes catalytic converter 35, and is connected with discharge duct 34 by mounting flange 34b and 34c.Described swirl nozzle 36 is arranged on erecting bed 36c by screw thread 36b, and is sealed by sealing gasket 36d.Multiphase flow 39 injection directions of spraying can flow at an angle (can be acute angle or obtuse angle) with engine exhaust 33, can also flow to identical or contrary with aerofluxus 33.When engine exhaust 33 flows through near swirl nozzle 36, the spraying of the multiphase flow containing DEF liquid 39 ejected with swirl nozzle 36 mixes, make DEF liquid therein pyrolysis for ammonia, it is evenly distributed in aerofluxus, common entrance catalyst 35, processing through SCR, the NOx in engine exhaust will decline to a great extent, and the waste gas 33b becoming cleaner discharges.
When multidirectional stream spraying 39 is reverse with exhaust stream 33 (angle can be comprised), in addition to also can saving installing space, also make relatively to mix stroke and lengthen, obtain more preferable clean-up effect.Or multidirectional stream spraying 39 can be made more effective with aerofluxus 33 must to mix at swirl nozzle 36 added downstream mixing blade.
Further, exhaust gas temperature sensor 37 described in native system, catalyst 35 and NOx or ammonia gas sensor 38 are arranged in the downstream of swirl nozzle 36 along discharge directions.
In order to ensure that catalyst 35 is to NOxHigh conversion efficiency, SCR system must accurately spray DEF according to conditions such as the NOx content in aerofluxus 33 and temperature.Therefore, the metered injection module 31 of system includes: controller 41, DEF dosing pump 42, DEF nozzle 43, DEF sensor (liquid level sensor 45, temperature sensor 44 etc.), air pressure valve 47, compressed air control valve 46, DEF compressed air hybrid chamber 48, blending transportation pipe 49.Described hybrid chamber 48 can be disposed at the outfan of dosing pump 42, is placed in the bottom of urea tank 54 together with dosing pump 42.
Obtain operating mode service data and the signals such as NOx sensor 37, exhaust gas temperature sensor 38 such as engine load rotating speed, logical operations obtains DEF dosing pump 42 needs the DEF amount of injection, and the instruction DEF dosing pump 42 controlled immediately works, corresponding DEF liquid is ejected to hybrid chamber 48 from DEF nozzle 43, before this, aftertreatment controller 41 should have been detected by system and can normally work, and controls to open compressed air control valve 46, and compressed air is delivered to hybrid chamber 48 by air intake duct 53.Therefore, DEF liquid and compressed air form gas-liquid polyphase flow in hybrid chamber 48, flow to swirl nozzle 36 through mixing flow tube 49, and the multiphase flow formed containing DEF liquid that is injected in exhaustor 34 through swirl nozzle 36 sprays 39.The control signal of described controller 41 is sent to dosing pump 42 by holding wire 52, and holding wire 52 can be drawn by air intake duct 53.
Aftertreatment controller 41 is after controlling DEF dosing pump 42 stopping injection DEF; certain time to be kept continues to carry compressed air to hybrid chamber 48; with the residual DEF liquid in cleaning mixing flow tube 49 and swirl nozzle 36, thus solid urea crystalline solid will not be separated out after ensureing to shut down and block pipeline.
Described DEF dosing pump 42 is the pulsed metering ejector pump of Electromagnetic Drive, and the DEF filter to be first passed around 50 in DEF urea tank 54 is just inhaled in DEF dosing pump 42, it is ensured that the reliability service of DEF dosing pump 42.The gas generated in DEF dosing pump 42, can be discharged to the top of DEF urea tank 54, it is ensured that will not form vapour lock by returning liquid exhaust gas bubble pipe 51.
Certainly, the swirl nozzle 36 of the present invention is not limited only to the pulsed metering ejector pump of the Electromagnetic Drive shown in Fig. 3, and any employing assists gas atomization and cleans the SCR system of DEF pipeline, can use the swirl nozzle of the present invention.
Fig. 6 is a kind of engine emission post processing DPF system schematic diagram applying swirl nozzle of the present invention, including fuel tank 55, swirl nozzle 36, dosing pump module 56, high pressure gas module 57, controller 58, and it is arranged in the temperature sensor 59 on exhaustor 34, differential pressure pickup 60 and oxygen sensor 61.
Swirl nozzle 36 is arranged on the exhaust pipe of engine 34, along exhaustor 34 in the downstream of eddy flow spraying nozzle 36, arranges particulate matter catcher (DPF) 62, and it is collected by filtration the soot in diesel exhaust gas 33 is Main Ingredients and Appearance particulate matter.Swirl nozzle 36, periodically to spraying fuel oil (diesel oil) in exhaustor 34, improves the temperature of aerofluxus 33 to being enough to and lights the particulate matter that DPF 62 collects, make DPF 62 be regenerated in time, it is ensured that DPF will not block.An oxidized form catalyst DOC 63, or direct noble metal-coating catalyst on catcher DPF 62 can be connected before DPF 62, to improve Tail Pipe Temperature, help regeneration.
Dosing pump module 56 includes a metering ejector pump 64, a filter 71, a nozzle 65, a gas-liquid mixed chamber 66, a blending transportation pipe 67.It is delivered to swirl nozzle 36 through blending transportation pipe 67 from the heterogeneous fluid of hybrid chamber 66 ejection.
High pressure gas module 57 includes pressure-regulating valve 47, compressed air control valve 46, air intake duct 65, and after control valve 46 is opened, the pressure-air after pressure-regulating valve 47 regulates enters hybrid chamber 66 through air intake duct 65.Described pressure-air comes from supercharger 66 and the downstream of charge air cooler 67.
In order to ensure that DPF 62 regenerates reliably, by DPF 62 refresh controller 58 according to engine operation condition, and the condition such as each sensor signal, the fuel oil filtered through filter 71 is sprayed to hybrid chamber 66 by metering ejector pump 64 and nozzle 65 quantitative timing, simultaneously, compressed air control valve 46 is opened, air enters hybrid chamber 66 and mixes with injection liquid, swirl nozzle 36 is entered through blending transportation pipe 67, it is then sprayed in the exhaust pipe of engine 34, formed and be atomized well distributed uniform umbrella oil gas mist 68, aerofluxus 33 is burnt, form high-temperature exhaust air entrance DPF 62 it is regenerated.68 directions of spraying can be parallel to exhaust stream 33 direction or with exhaust stream 33 direction at an angle.
Should compressed air gas source described in use-case be engine supercharger 74 charge air cooler 75 after air inlet, compressed air is in addition to assisted atomization, it is also possible to the burning for fuel oil further provides for oxygen.After fuel injection processes terminates, compressed air control valve 46 can be used for clearing away wherein residual fuel oil with time-delay closing, prevents oil dripping from forming the blocking swirl nozzle 36 such as coking or carbon distribution.
Above-mentioned dpf regeneration system, described fuel tank 55 could be for the auxiliary fuel tank of DPF system, the oil return (preferably taking the form of series connection) of engine high pressure spraying system enters auxiliary fuel tank 55 by oil-in 70, is returned to the main fuel tank of electromotor the most again by oil return opening 69.Metering ejector pump 64 is positioned on fuel tank, and fuel oil can flow out through liquid inlet channel 72 due to deadweight, enters dosing pump 64 after filter, and in work process, excess fuel then flows back to fuel tank 55 from time fluid passage 73, forms oil supply loop.Described filter 71 can also be substituted by main fuel tank filter (not shown).
For dpf regeneration system, pressure-air can also be not involved in fuel injection processes, be only used for cleaning process.
Above-mentioned example is merely illustrative the present invention, but is not limiting as the present invention, and all further change schemes based on spirit of the invention all belong to the scope that the present invention is open and protects.
Claims (10)
1. an exhaust aftertreatment swirl nozzle, including a nozzle body, one is positioned at the spin chamber among nozzle body, one spray orifice being positioned at center, spin chamber, including at least one tangential runner, it is characterized in that, the ratio of total circulation area of described tangential runner and the circulation area of spray orifice is between 0.75-1.5.
2. exhaust aftertreatment swirl nozzle as claimed in claim 1, it is characterized in that, including an eddy flow core and jet orifice plate, eddy flow core includes a rotator shaped spin chamber and at least one groove tangent with edge, spin chamber, jet orifice plate includes spray orifice, and eddy flow core is combined formation spin chamber and tangential runner with jet orifice plate.
3. exhaust aftertreatment swirl nozzle as claimed in claim 2, it is characterised in that spray orifice is made up of a revolution space and rotary body, and rotation position is in the center of revolution space.
4. the exhaust aftertreatment swirl nozzle as described in one of claim 1-3 item, it is characterised in that include a snap joint, a thermal insulation barriers, described thermal insulation barriers connects nozzle body and snap joint.
5. exhaust aftertreatment swirl nozzle as claimed in claim 4, it is characterised in that described thermal insulation barriers is an elongated tubular.
6. the exhaust aftertreatment swirl nozzle as described in one of claim 1-3 item, it is characterised in that include and the close-connected heat exchanger of nozzle body, by heat convection and heat radiation mode, the heat of nozzle body is taken in air.
7. the exhaust aftertreatment swirl nozzle as described in claim 5 or 6, it is characterised in that described snap joint meets SAE J2044.
8. the After-treatment technics SCR system of the arbitrary described engine exhaust post processing swirl nozzle applying claim 1 to 7, it is characterized in that, a hybrid chamber it is provided with in the upstream of described swirl nozzle, aqueous solution of urea and gases at high pressure form gas-liquid multiphase mixing interflow in described hybrid chamber, spray into the exhaust pipe of engine subsequently into described swirl nozzle.
9. the After-treatment technics SCR system of the arbitrary described engine exhaust post processing swirl nozzle applying claim 1 to 7, it is characterized in that, including hush pipe and SCR catalytic reduction device, described exhaust aftertreatment swirl nozzle is arranged in the upstream of hush pipe, to such an extent as to aqueous solution of urea sprays into hush pipe.
10. the After-treatment technics dpf regeneration system of the arbitrary described engine exhaust post processing swirl nozzle applying claim 1 to 7, it is characterized in that, a hybrid chamber it is provided with in the upstream of described swirl nozzle, fuel oil and gases at high pressure form gas-liquid multiphase mixing interflow in described hybrid chamber, spray into the exhaust pipe of engine subsequently into described swirl nozzle.
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| CN201510079077.7A CN105986863A (en) | 2015-02-15 | 2015-02-15 | Swirl nozzle for exhaust aftertreatment |
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| CN201510079077.7A CN105986863A (en) | 2015-02-15 | 2015-02-15 | Swirl nozzle for exhaust aftertreatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060954A (en) * | 2017-03-22 | 2017-08-18 | 中国第汽车股份有限公司 | Spraying system and control method for purifying exhaust carbon fume particle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11107888A (en) * | 1997-10-07 | 1999-04-20 | Nippon Soken Inc | Fuel injection valve |
| US6089473A (en) * | 1996-09-12 | 2000-07-18 | Robert Bosch Gmbh | Valve, in particular a fuel injection valve |
| US20010048035A1 (en) * | 1998-04-08 | 2001-12-06 | Gunter Dantes | Fuel injection valve and a method for installing a fuel injection valve |
| CN102619658A (en) * | 2011-01-31 | 2012-08-01 | 日立汽车系统株式会社 | Fuel injector |
| CN102900581A (en) * | 2011-07-25 | 2013-01-30 | 日立汽车系统株式会社 | Fuel injector |
| CN203822420U (en) * | 2013-12-04 | 2014-09-10 | 潍柴动力股份有限公司 | Box-type SCR catalytic muffler and air inlet pipe device thereof |
-
2015
- 2015-02-15 CN CN201510079077.7A patent/CN105986863A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6089473A (en) * | 1996-09-12 | 2000-07-18 | Robert Bosch Gmbh | Valve, in particular a fuel injection valve |
| JPH11107888A (en) * | 1997-10-07 | 1999-04-20 | Nippon Soken Inc | Fuel injection valve |
| US20010048035A1 (en) * | 1998-04-08 | 2001-12-06 | Gunter Dantes | Fuel injection valve and a method for installing a fuel injection valve |
| CN102619658A (en) * | 2011-01-31 | 2012-08-01 | 日立汽车系统株式会社 | Fuel injector |
| CN102900581A (en) * | 2011-07-25 | 2013-01-30 | 日立汽车系统株式会社 | Fuel injector |
| CN203822420U (en) * | 2013-12-04 | 2014-09-10 | 潍柴动力股份有限公司 | Box-type SCR catalytic muffler and air inlet pipe device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 闫云飞等: "低压旋流雾化喷嘴的雾化性能", 《化工学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060954A (en) * | 2017-03-22 | 2017-08-18 | 中国第汽车股份有限公司 | Spraying system and control method for purifying exhaust carbon fume particle |
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Application publication date: 20161005 |
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