CN110410185A - A kind of crystallization-preventive close-coupled urea mixing device - Google Patents
A kind of crystallization-preventive close-coupled urea mixing device Download PDFInfo
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- CN110410185A CN110410185A CN201910601355.9A CN201910601355A CN110410185A CN 110410185 A CN110410185 A CN 110410185A CN 201910601355 A CN201910601355 A CN 201910601355A CN 110410185 A CN110410185 A CN 110410185A
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- arc panel
- cyclone mixer
- section
- baffle
- urea
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- 238000002156 mixing Methods 0.000 title claims abstract description 65
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000004202 carbamide Substances 0.000 title claims abstract description 58
- 230000007704 transition Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000013078 crystal Substances 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of crystallization-preventive close-coupled urea mixing device, including by top plate, bottom plate, the No.1 mixing arrangement that annular sidewall encloses, annular sidewall is by No.1 arc panel, No.1 straight panel, No. two arc panels, No. two straight panel head and the tail are connected in sequence, the position of nearly No.1 arc panel offers the through-hole of connection DPF unit on top plate, the urea jet port being connected with inner cavity is provided on No.1 arc panel, the cyclone mixer of nearly No. two arc panels arrangement is provided in inner cavity, the outer wall and the inclined plate in the middle part of No.1 straight panel for connecting cyclone mixer, baffle, baffle is in the C character form structure being open towards No. two straight panels, its both ends respectively with No.1 arc panel, No. two straight panels are connected, side on the outer wall of cyclone mixer far from baffle has been evenly arranged multiple airflow inlets, top is evenly arranged with multiple even air stream outlets, cyclone mixer, inclined plate , baffle and annular sidewall enclose S-shaped runner.The design not only avoids urea crystals, and improves mixed effect.
Description
Technical field
The invention belongs to automobile engine tail gas purification techniques fields, and in particular to a kind of crystallization-preventive close-coupled urea mixing
Device, suitable for improving the mixed effect of urea and tail gas, avoiding urea crystals.
Background technique
Diesel engine vent gas cleaning treatment system is mainly made of DPF system, SCR system.DPF system mainly plays filtering tail
The effect of PM in gas, SCR system are then used for the NOx in catalyzed conversion tail gas, catalytic conversion process are as follows: first pass through nozzle to
Aqueous solution of urea is sprayed into SCR system in the mixer of SCR catalyst upstream to carry out tail gas and urea converted product
Mixing, mixer, which enters back into, carries out catalyzed conversion in SCR catalyst.
Chinese patent: application publication number CN108331643A, the patent of invention in data of publication of application on July 27th, 2018 disclose
A kind of compact DOC-DPF-SCR after-treatment device, the whole U-shaped structure of the device, including DOC-DPF unit, air inlet are mixed
Clutch, SCR unit, DOC-DPF unit, SCR unit are arranged side by side in the top of air inlet mixer, and DOC-DPF unit with into
The inlet end of gas mixer is connected, and SCR unit is connected with the exhaust end of air inlet mixer.Although double-cylinder type design can
Discharge and space characteristic are preferably taken into account, for more traditional box after-treatment device there is good vehicle to apply mating advantage,
The installation space of the compact vehicle of double-front axle can be effectively catered to, but there are following defects for the device:
1, the structure is easy to cause urea not to be sufficiently mixed in a mixer and is just entered below due to the limitation in mixer space
SCR carrier, so as to cause carrier blocking；
2, there can be the spraying risk for hitting wall in early days of urea during urea liquid mixes in a mixer with tail gas, thus aobvious
Write the risk for increasing urea crystals blocking.
Summary of the invention
The purpose of the present invention is overcoming, mixed effect of the existing technology is bad, risk is biggish asks for urea crystals blocking
Topic provides a kind of crystallization-preventive close-coupled urea mixing device that can be effectively improved mixed effect, avoid urea crystals.
In order to achieve the above object, the present invention provides following technical schemes:
A kind of crystallization-preventive close-coupled urea mixing device, the inlet and outlet end of the mixing arrangement is respectively and after DPF unit, SCR
Reason device is connected；
The mixing arrangement includes No.1 mixing arrangement, and the No.1 mixing arrangement includes top plate and bottom plate, annular sidewall, described
Top plate and bottom plate and annular sidewall enclose the inner cavity of No.1 mixer, the annular sidewall by No.1 arc panel, No.1 straight panel,
No. two arc panels, No. two straight panel head and the tail are connected in sequence, and the position of nearly No.1 arc panel offers connection DPF on the top plate
Unit, inner cavity through-hole, be provided with the urea jet port being connected with inner cavity on the No.1 arc panel；
Cyclone mixer, the outer wall for connecting cyclone mixer and the No.1 that nearly No. two arc panels arrangement is provided in the inner cavity are straight
Inclined plate in the middle part of plate, the baffle between No.1 arc panel and cyclone mixer, the cyclone mixer, inclined plate, baffle
Upper and lower surfaces are fixedly connected with top plate and bottom plate respectively, and the baffle in opening towards No. two straight panels C character form structure, two
End is connected with No.1 arc panel, No. two straight panels respectively, and the cyclone mixer is cylindrical structure, the outer wall of cyclone mixer
The upper side far from baffle is evenly arranged the airflow inlet inside multiple connection inner cavities and cyclone mixer, cyclone mixer
Top is evenly arranged with inside multiple connection cyclone mixers and the air stream outlets of SCR postprocessor, the cyclone mixer, tiltedly
Plate, baffle and annular sidewall enclose S-shaped runner.
The baffle includes arc panel section, transverse slat section, tilted plate section, one end of the arc panel section and the one of No.1 arc panel
End is fixedly connected, and the other end of arc panel section passes sequentially through transverse slat section, tilted plate section is connected with No. two straight panels, and arc panel section edge
The outlet arrangement of through-hole is simultaneously concentric with No.1 arc panel.
The nearly No.1 straight panel arrangement of the urea jet port, and the central axes of urea jet port with plane institute where transverse slat section
The angle of formation is 0 ° -30 °.
The cyclone mixer is internally provided with multiple and airflow inlet, the one-to-one first eddy flow leaf of air stream outlet
The side of piece, first swirl vane is fixedly connected with the inner wall of airflow inlet or air stream outlet, the first swirl vane it is another
Side is arranged towards cyclone mixer inside.
The mixing arrangement further includes No. two mixing arrangements between air stream outlet and SCR postprocessor, and described two
Number mixing arrangement is internally provided with eddy flow tray, and the outer wall of the eddy flow tray and the inner wall of mixing arrangement fit, on eddy flow tray
Be evenly arranged multiple mixed gas outlets and with its one-to-one second swirl vane, the mixed gas outlet into, row
Gas end is connected with air stream outlet, SCR postprocessor respectively, the side of second swirl vane and the inner wall of mixed gas outlet
It is fixedly connected, the disposed outside of the other side No. two mixing arrangements of direction of the second swirl vane.
Arc transition is all made of between the arc panel section and transverse slat section, between transverse slat section and tilted plate section.
Compared with prior art, the invention has the benefit that
1, the eddy flow of nearly No. two arc panels arrangement is provided in a kind of crystallization-preventive close-coupled urea mixing device of the present invention in inner cavity
Mixer, the outer wall for connecting cyclone mixer and inclined plate in the middle part of No.1 straight panel, be located at No.1 arc panel and cyclone mixer it
Between baffle, baffle in opening towards No. two straight panels C character form structure, both ends respectively with No.1 arc panel, No. two straight panel phases
Connection, cyclone mixer are cylindrical structure, and the side far from baffle has been evenly arranged multiple companies on the outer wall of cyclone mixer
Lead to the airflow inlet inside inner cavity and cyclone mixer, is evenly arranged with multiple connection cyclone mixers at the top of cyclone mixer
The internal air stream outlet with SCR postprocessor, cyclone mixer, inclined plate, baffle and annular sidewall enclose S-shaped runner, originally set
Meter uses special runner design, on the one hand by the interaction of tail gas stream and urea mist beam so that urea Spray Impingement away from
From longer, to significantly reduce the risk that urea mist beam hits wall too early, urea crystals are avoided, on the other hand, the design is by prolonging
The mixing distance of long internal mixer effectively increases the mixed effect of urea and tail gas.Therefore, invention not only avoids urine
Element crystallization, and improve the mixed effect of urea and tail gas.
It 2, further include being located at air stream outlet and SCR postprocessor in a kind of crystallization-preventive close-coupled urea mixing device of the present invention
Between No. two mixing arrangements, No. two mixing arrangements are internally provided with eddy flow tray, which passes through in No.1 mixing arrangement
One cyclone mixer of added downstream is successively mixed using two mixers, urea and tail gas are further improved
Mixing uniformity, to ensure that SCR efficiency is maintained at higher level.Therefore, the present invention further improves urea and tail gas
Mixed effect.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the schematic diagram of internal structure of No.1 mixing arrangement in Fig. 1.
Fig. 3 is the structural schematic diagram of No. two mixing arrangements in Fig. 1.
Fig. 4 is the structural schematic diagram of eddy flow tray in Fig. 3.
In figure, No.1 mixing arrangement 1, top plate 11, through-hole 111, bottom plate 12, annular sidewall 13, No.1 arc panel 131, one
Number straight panel 132, two arc panel 133, two straight panel 134, inner cavity 14, urea jet port 2, cyclone mixer 3, airflow inlet
31, air stream outlet 32, the first swirl vane 33, inclined plate 4, baffle 5, arc panel section 51, transverse slat section 52, tilted plate section 53, two it is mixed
It attaches together and sets 6, eddy flow tray 61, mixed gas outlet 611, the second swirl vane 612.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
Referring to Fig. 1 to Fig. 4, a kind of crystallization-preventive close-coupled urea mixing device, the inlet and outlet end difference of the mixing arrangement
It is connected with DPF unit, SCR postprocessor；
The mixing arrangement includes No.1 mixing arrangement 1, and the No.1 mixing arrangement 1 includes top plate 11, bottom plate 12, annular sidewall
13, the top plate 11, bottom plate 12 and annular sidewall 13 enclose the inner cavity 14 of No.1 mixer 1, and the annular sidewall 13 is by one
Number arc panel 131,134 head and the tail of straight panel of arc panel 133, two of No.1 straight panel 132, two are connected in sequence, the top plate 11
The position of upper nearly No.1 arc panel 131 offers the through-hole 111 of connection DPF unit, inner cavity 14, on the No.1 arc panel 131
It is provided with the urea jet port 2 being connected with inner cavity 14；
It is provided with the cyclone mixer 3 of nearly No. two arc panels 133 arrangement in the inner cavity 14, connects the outer wall of cyclone mixer 3
With inclined plate 4, the baffle 5 between No.1 arc panel 131 and cyclone mixer 3 at 132 middle part of No.1 straight panel, the eddy flow is mixed
Clutch 3, inclined plate 4, baffle 5 upper and lower surfaces be fixedly connected respectively with top plate 11, bottom plate 12, and the baffle 5 in opening direction
The C character form structure of No. two straight panels 134, both ends are connected with 131, No. two straight panels 134 of No.1 arc panel respectively, and the eddy flow is mixed
Clutch 3 is cylindrical structure, and the side far from baffle 5 has been evenly arranged multiple connection inner cavities 14 on the outer wall of cyclone mixer 3
With the airflow inlet 31 inside cyclone mixer 3, the top of cyclone mixer 3 is evenly arranged with multiple connection cyclone mixers 3
The internal air stream outlet 32 with SCR postprocessor, the cyclone mixer 3, inclined plate 4, baffle 5 and annular sidewall 13 enclose S
Shape runner.
The urea jet port 2 nearly No.1 straight panel 132 arrangement, and where the central axes of urea jet port 2 and transverse slat section 52
It is 0 ° -30 ° that plane, which is formed by angle,.
The baffle 5 includes arc panel section 51, transverse slat section 52, tilted plate section 53, one end of the arc panel section 51 and No.1
One end of arc panel 131 is fixedly connected, and the other end of arc panel section 51 passes sequentially through transverse slat section 52, tilted plate section 53 and No. two straight panels
134 are connected, and arc panel section 51 along through-hole 111 outlet arrangement and with No.1 arc panel 131 it is concentric.
The cyclone mixer 3 is internally provided with multiple and airflow inlet 31, air stream outlet 32 one-to-one first revolves
Blade 33 is flowed, the side of first swirl vane 33 is fixedly connected with the inner wall of airflow inlet 31 or air stream outlet 32, and first
The other side of swirl vane 33 is towards arranging inside cyclone mixer 3.
The mixing arrangement further includes No. two mixing arrangements 6 between air stream outlet 32 and SCR postprocessor, described
No. two mixing arrangements 6 are internally provided with eddy flow tray 61, and the inner wall of the outer wall and mixing arrangement 6 of the eddy flow tray 61 fits,
Be evenly arranged on eddy flow tray 61 multiple mixed gas outlets 611 and with its one-to-one second swirl vane 612, it is described mixed
The inlet and outlet end for closing gas outlet 611 is connected with air stream outlet 32, SCR postprocessor respectively, second swirl vane 612
Side be fixedly connected with the inner wall of mixed gas outlet 611, the other side of the second swirl vane 612 is towards No. two mixing arrangements 6
Disposed outside.
Arc transition is all made of between the arc panel section 51 and transverse slat section 52, between transverse slat section 52 and tilted plate section 53.
The principle of the present invention is described as follows:
The present invention provides a kind of close-coupled urea mixing device, special runner design is used inside the mixing arrangement, is promoted
Tail gas interacts by spraying with urea, reduces the risk that urea hits wall crystallization too early, and mix runner long enough, mixer pressure drop
It is low.Air-flow trend inside the mixing arrangement specifically:
Urea liquid enters inner cavity 14 by urea jet port 2, starts to mix with the tail gas from through-hole 111, subsequent gaseous mixture
It passes through after nearby by the region between inclined plate 4 and baffle 5, cyclone mixer 3 and is entered in cyclone mixer 3 by airflow inlet 31
Portion, then enters the inside of No. two mixing arrangements 6 by air stream outlet 32, and is discharged by mixed gas outlet 611.
The present invention by the central axes of urea jet port 2 and 52 place plane of transverse slat section be formed by angle control 0 °-
30 °, after spraying urea, urea mist beam can blow off transverse slat section 52 under the action of arc panel section 51, to effectively avoid itself and cross
Plate section 52 hits wall crystallization.
Airflow inlet 31: urea is spraying in order to prevent enters cyclone mixer 3 too early, and airflow inlet 31 is arranged the present invention
Far from the side of baffle 5 on cyclone mixer 3, exhaust gas and urea will form between the side and tilted plate section 53 of baffle 5
Spraying flow channel.
Embodiment 1:
Referring to Fig. 1 to Fig. 4, a kind of crystallization-preventive close-coupled urea mixing device, the mixing arrangement includes No.1 mixing arrangement 1,
The No.1 mixing arrangement 1 includes top plate 11, bottom plate 12, annular sidewall 13, and the top plate 11, bottom plate 12 and annular sidewall 13 enclose
The inner cavity 14 of No.1 mixer 1 is synthesized, the annular sidewall 13 is by 132, No. two No.1 arc panel 131, No.1 straight panel arc panels
133, No. two 134 head and the tail of straight panel are connected in sequence, and the position of nearly No.1 arc panel 131 offers connection on the top plate 11
DPF unit, inner cavity 14 through-hole 111, be provided on the No.1 arc panel 131 and be connected with inner cavity 14 and nearly No.1 straight panel
The urea jet ports 2 of 132 arrangements are provided with cyclone mixer 3, the connection of nearly No. two arc panels 133 arrangement in the inner cavity 14
The inclined plate 4 at 132 middle part of the outer wall of cyclone mixer 3 and No.1 straight panel, between No.1 arc panel 131 and cyclone mixer 3
Baffle 5, the cyclone mixer 3, inclined plate 4, baffle 5 upper and lower surfaces be fixedly connected respectively with top plate 11, bottom plate 12, and
The baffle 5 is in the C character form structure being open towards No. two straight panels 134, including arc panel section 51, transverse slat section 52, tilted plate section 53, institute
The one end for stating arc panel section 51 is fixedly connected with one end of No.1 arc panel 131, and the other end of arc panel section 51 passes sequentially through cross
Plate section 52, tilted plate section 53 are connected with No. two straight panels 134, and arc panel section 51 is along the outlet arrangement and and No.1 of through-hole 111
Arc panel 131 with one heart, is all made of arc transition between arc panel section 51 and transverse slat section 52, between transverse slat section 52 and tilted plate section 53,
It is 0 ° -30 ° that the central axes of 52 place plane of transverse slat section and urea jet port 2, which are formed by angle, and the cyclone mixer 3 is circle
Column construction, the side on the outer wall of cyclone mixer 3 far from baffle 5 have been evenly arranged multiple connection inner cavities 14 and have mixed with eddy flow
Airflow inlet 31 inside device 3, after the top of cyclone mixer 3 is evenly arranged with multiple 3 inside of connection cyclone mixer and SCR
The air stream outlet 32 of processor, cyclone mixer 3 are internally provided with multiple one-to-one with airflow inlet 31, air stream outlet 32
The inner wall of first swirl vane 33, the side of first swirl vane 33 and airflow inlet 31 or air stream outlet 32 is fixed to be connected
It connects, the other side of the first swirl vane 33 is towards arranging inside cyclone mixer 3, the cyclone mixer 3, inclined plate 4, baffle 5
S-shaped runner is enclosed with annular sidewall 13.
Embodiment 2:
Difference from example 1 is that:
The mixing arrangement further includes No. two mixing arrangements 6 between air stream outlet 32 and SCR postprocessor, and described No. two
Mixing arrangement 6 is internally provided with eddy flow tray 61, and the inner wall of the outer wall and mixing arrangement 6 of the eddy flow tray 61 fits, eddy flow
Be evenly arranged on disk 61 multiple mixed gas outlets 611 and with its one-to-one second swirl vane 612, the gaseous mixture
The inlet and outlet end of outlet 611 is connected with air stream outlet 32, SCR postprocessor respectively, and the one of second swirl vane 612
Side is fixedly connected with the inner wall of mixed gas outlet 611, outside the other side No. two mixing arrangements 6 of direction of the second swirl vane 612
Portion's arrangement.
Claims (6)
1. a kind of crystallization-preventive close-coupled urea mixing device, the inlet and outlet end of the mixing arrangement is respectively and after DPF unit, SCR
Processor is connected, it is characterised in that:
The mixing arrangement includes No.1 mixing arrangement (1), the No.1 mixing arrangement (1) include top plate (11), bottom plate (12),
Annular sidewall (13), the top plate (11), bottom plate (12) enclose the inner cavity of No.1 mixer (1) with annular sidewall (13)
(14), the annular sidewall (13) is by No.1 arc panel (131), No.1 straight panel (132), No. two arc panels (133), No. two straight panels
(134) be connected in sequence from beginning to end, on the top plate (11) position of nearly No.1 arc panel (131) offer connection DPF unit,
The through-hole (111) of inner cavity (14) is provided with the urea jet port being connected with inner cavity (14) on the No.1 arc panel (131)
(2)；
Cyclone mixer (3), the connection cyclone mixer of nearly No. two arc panels (133) arrangement are provided in the inner cavity (14)
(3) inclined plate (4) in the middle part of outer wall and No.1 straight panel (132), between No.1 arc panel (131) and cyclone mixer (3)
Baffle (5), the cyclone mixer (3), inclined plate (4), baffle (5) upper and lower surfaces respectively with top plate (11), bottom plate (12)
Be fixedly connected, and the baffle (5) in opening towards No. two straight panels (134) C character form structure, both ends respectively with No.1 arc
Plate (131), No. two straight panels (134) are connected, and the cyclone mixer (3) is cylindrical structure, the outer wall of cyclone mixer (3)
The upper side far from baffle (5) is evenly arranged the airflow inlet of multiple connections inner cavity (14) and cyclone mixer (3) inside
(31), the internal gas with SCR postprocessor of multiple connections cyclone mixer (3) is evenly arranged at the top of cyclone mixer (3)
Outflux (32), the cyclone mixer (3), inclined plate (4), baffle (5) and annular sidewall (13) enclose S-shaped runner.
2. a kind of crystallization-preventive close-coupled urea mixing device according to claim 1, it is characterised in that: the baffle (5)
Including arc panel section (51), transverse slat section (52), tilted plate section (53), one end of the arc panel section (51) and No.1 arc panel
(131) one end is fixedly connected, and it is straight that the other end of arc panel section (51) passes sequentially through transverse slat section (52), tilted plate section (53) and No. two
Plate (134) is connected, and arc panel section (51) along through-hole (111) outlet arrangement and with No.1 arc panel (131) it is concentric.
3. a kind of crystallization-preventive close-coupled urea mixing device according to claim 2, it is characterised in that: the urea injection
Nearly No.1 straight panel (132) arrangement of mouth (2), and the central axes of urea jet port (2) are formed by with plane where transverse slat section (52)
Angle is 0 ° -30 °.
4. a kind of crystallization-preventive close-coupled urea mixing device according to claim 1 or 2, it is characterised in that: the eddy flow
Mixer (3) is internally provided with multiple and airflow inlet (31), one-to-one first swirl vane (33) of air stream outlet (32),
The side of first swirl vane (33) is fixedly connected with the inner wall of airflow inlet (31) or air stream outlet (32), the first eddy flow
The other side of blade (33) is arranged towards cyclone mixer (3) is internal.
5. a kind of crystallization-preventive close-coupled urea mixing device according to claim 1 or 2, it is characterised in that: the mixing
Device further includes No. two mixing arrangements (6) between air stream outlet (32) and SCR postprocessor, No. two mixing arrangements
(6) be internally provided with eddy flow tray (61), the inner wall of the outer wall and mixing arrangement (6) of the eddy flow tray (61) fits, eddy flow
Be evenly arranged on disk (61) multiple mixed gas outlets (611) and with its one-to-one second swirl vane (612), it is described
The inlet and outlet end of mixed gas outlet (611) is connected with air stream outlet (32), SCR postprocessor respectively, the second eddy flow leaf
The side of piece (612) is fixedly connected with the inner wall of mixed gas outlet (611), the other side direction two of the second swirl vane (612)
The disposed outside of number mixing arrangement (6).
6. a kind of crystallization-preventive close-coupled urea mixing device according to claim 3, it is characterised in that: the arc panel section
(51) arc transition is all made of between transverse slat section (52), between transverse slat section (52) and tilted plate section (53).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910601355.9A CN110410185B (en) | 2019-07-03 | 2019-07-03 | Anti-crystallization compact urea mixing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910601355.9A CN110410185B (en) | 2019-07-03 | 2019-07-03 | Anti-crystallization compact urea mixing device |
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| CN110410185A true CN110410185A (en) | 2019-11-05 |
| CN110410185B CN110410185B (en) | 2020-05-08 |
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| CN110821615A (en) * | 2019-12-19 | 2020-02-21 | 无锡亿利环保科技有限公司 | Urea aqueous solution decomposition mixing device |
| CN111156072A (en) * | 2019-12-19 | 2020-05-15 | 河北亿利橡塑集团有限公司 | Tail gas aftertreatment mixing arrangement |
| CN111648844A (en) * | 2020-06-22 | 2020-09-11 | 无锡威孚力达催化净化器有限责任公司 | A blade blender for end cover side is spouted |
| CN111764988A (en) * | 2020-06-29 | 2020-10-13 | 东风商用车有限公司 | Aftertreatment encapsulation SCR blender unit |
| CN111779558A (en) * | 2020-07-07 | 2020-10-16 | 无锡威孚力达催化净化器有限责任公司 | Urea mixer for U-shaped large end cover |
| CN112012814A (en) * | 2020-08-18 | 2020-12-01 | 无锡威孚力达催化净化器有限责任公司 | Mixing device for spraying upper end of U-shaped end cover |
| CN112081646A (en) * | 2020-09-21 | 2020-12-15 | 浙江银轮机械股份有限公司 | Tail gas treatment mixing arrangement and tail gas treatment system |
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| CN112855315A (en) * | 2021-02-05 | 2021-05-28 | 无锡亿利环保科技有限公司 | SCR urea mixer |
| CN113530650A (en) * | 2021-07-29 | 2021-10-22 | 东风商用车有限公司 | Efficient SCR (Selective catalytic reduction) cylinder type mixer and vehicle adopting same |
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