CN209385209U - A kind of diesel engine after-treatment system SCR urea mixer - Google Patents
A kind of diesel engine after-treatment system SCR urea mixer Download PDFInfo
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- CN209385209U CN209385209U CN201822162157.0U CN201822162157U CN209385209U CN 209385209 U CN209385209 U CN 209385209U CN 201822162157 U CN201822162157 U CN 201822162157U CN 209385209 U CN209385209 U CN 209385209U
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- end panel
- mixing chamber
- diesel engine
- mixer
- air inlet
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000004202 carbamide Substances 0.000 title claims abstract description 59
- 238000002156 mixing Methods 0.000 claims abstract description 81
- 238000009423 ventilation Methods 0.000 claims abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 210000002700 urine Anatomy 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 50
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 36
- 239000007864 aqueous solution Substances 0.000 abstract description 12
- 241000208340 Araliaceae Species 0.000 abstract description 7
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 abstract description 7
- 235000003140 Panax quinquefolius Nutrition 0.000 abstract description 7
- 235000008434 ginseng Nutrition 0.000 abstract description 7
- 238000000197 pyrolysis Methods 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 6
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a kind of diesel engine after-treatment system SCR urea mixers.Including barrel-type casing, aqueous urea solution spray nozzle mounting base, the mixer assembly for being mounted on barrel-type casing interior forward end, there is spoiler at the rear portion of mixer assembly；Mixer assembly is made of intake end panel, inlet chamber, air inlet, mixing chamber, ventilation end panel, gas outlet etc..Mixing chamber is connected with the exhaust outlet of air inlet and ventilation end panel in intake end panel, the tail gas thermal current of diesel engine discharge enters mixing chamber through air inlet from the inlet chamber in intake end panel, it is mixed that high speed rotation ginseng is carried out with the aqueous solution of urea that urea nozzle sprays into, then the expansion mixing chamber at mixer rear portion is injected into from the exhaust outlet high speed of mixer ventilation end panel, carry out adequately mixing and pyrolysis, spoiler is passed through later enters SCR catalyst to selective catalytic reduction chemical reaction, eliminate the nitrogen oxides in diesel engine hot exhaust gas, reach and meet the requirement of state's VI discharge standard.
Description
Technical field
The utility model belongs to technical field of environmental management, especially belongs to exhaust gas purification equipment design and manufacturing technology field,
It is related to diesel engine exhaust aftertreatment technology, in particular to a kind of diesel engine after-treatment system SCR urea mixer.
Background technique
The reduction exhaust emissions technology that diesel engine exhaust after treatment system uses at present has following two technological approaches
With route: 1) by the combustion system in optimization diesel engine cylinder, after in-cylinder particulate purification and the engine of realizing engine
The catalyzing and reducing nitrogen oxides of processing system, i.e. SCR SCR technology, 2) using purification in the cylinder of diesel engine
The EGR (engines exhaust gas recirculation) of nitrogen oxides and the particulate trap DPF of engine aftertreatment system filter microparticle technologies.
Implement requirement as defined in state VI discharge standard to meet diesel internal combustion rolling stock and engineering mechanical device, in conjunction with diesel internal combustion locomotive
With the production and operation economy of ship and the actual state of diesel vehicle ship tail gas discharge standard etc., for reduce state
The discharge of interior diesel vehicle and diesel engine nitrogen oxides, in the row of diesel engine commercial vehicle, bogie, engineering machinery and ship
Selective catalytic reduction SCR technology has been generallyd use in gas after-treatment system.The course of work of SCR system is by aqueous solution of urea
Sprayed by urea jet pump and nozzle in the exhaust pipe of diesel engine, in exhaust pipe with the hot exhaust gas of internal combustion engine discharge into
Row mixing, mixed hot gas enter SCR catalyst；Catalyst of the aqueous solution of urea on high-temperature gas and catalyst converter is common
Simultaneously pyrolysis decomposition becomes ammonia to the lower acceleration atomization of effect, and the nitrogen oxides progress chemistry in ammonia and diesel engine hot exhaust gas is instead
It answers, generates nitrogen discharge, to reduce the amount of nitrogen oxides in diesel engine hot exhaust gas, reach and meet state's VI exhaust method
Requirement in rule standard.
The effect of SCR urea mixer is to the urea water ejected in diesel engine after-treatment system to urea nozzle
Solution is crushed and is atomized, and realizes that it carries out full and uniform ginseng with the hot exhaust gas of diesel engine discharge and mixes and mixed pass
Key apparatus.SCR mixer in domestic existing diesel engine after-treatment system technical solution is widely used internal layer and wears with outer layer
The nitrogen oxides tail gas of hole pipe structure, aqueous solution of urea and the internal combustion engine discharge that urea nozzle ejects carries out on inner pipe wall
It is atomized for the first time, then under the outer perforation effect of outer tube, carries out second and be atomized, subsequently into inlet chamber；Mixer work
All there is aqueous solution of urea in the process and mix unevenness with the hot exhaust gas that diesel engine is discharged, is urged in the inside of mixer with SCR
Change the problems such as device end face there are a large amount of urea crystals, SCR catalyst is caused to block.
Summary of the invention
To disclose a kind of diesel engine after-treatment system SCR urea mixed for deficiency according to prior art for the utility model
Clutch.Problem to be solved in the utility model, which is to provide, a kind of can satisfy wanting for China Diesel internal combustion engine state's VI emission regulation
Ask, mixer aqueous solution of urea can more sufficiently be atomized with mix, urea does not crystallize, the better diesel internal combustion of tail gas clean-up
Machine after-treatment system SCR urea mixer,
The utility model is achieved through the following technical solutions:
Diesel engine exhaust gas aftertreatment system SCR urea mixer, including cylindrical housings and set on the urine of shell
Plain nozzle carrier, it is characterised in that: the housing forward end and rear end have flat panel to be hermetically connected with the shell composition cylindrical empty
Chamber, cylindrical cavity are followed successively by mixing chamber, expansion mixing chamber, SCR catalyst by front end to rear end；
The mixing chamber includes: the intake end panel of housing forward end, and the outlet end face of mixing chamber is constituted with intake end panel
Plate, urea nozzle seat are set on the housing wall for constituting mixing chamber, intake end panel opening and be circumferentially arranged along mixing chamber
Air inlet connection, air inlet are set to urea nozzle seat week forward end, and circumferentially arranged helical structure has convergence in mixing chamber
The drainage plate of flow characteristics, ventilation end panel output port connection expansion mixing chamber；
The expansion mixing chamber includes: ventilation end panel and the cavity that SCR catalyst front end face is constituted, the axial middle part of cavity
It is disposed radially the spoiler of changeable flowing gas state；
After the SCR catalyst periphery wall and inner walls sealing are fixed and are set to expansion mixing chamber.
Intake end panel described in the utility model opening is located at intake end panel edge, opening with axially arranged along shell
Siding constitutes inlet chamber, and the siding front end axially arranged and intake end panel are tightly connected, rear end and ventilation end panel sealing connect
It connects, air inlet is arranged along mixing chamber circumferential openings in siding.
Helical structure one end of the drainage plate is arranged in urea nozzle seat week to the back-end, and spiral convergence rear end is arranged in out
Gas end plates output port.
It is at least circumferential in axially wrapping gas outlet that drainage plate spiral convergence rear end is arranged in ventilation end panel gas outlet
2/3rds.
Ventilation end panel described further outputs port and is located at ventilation end panel close to marginal position, and gas outlet is located at expansion
Axial shelves flowing plate and radial shelves flowing plate is arranged in mixing chamber side.
Flow-disturbing plate surface setting runs through, uniform turbulence blades.
There are one or several auxiliary inlet ports in the intake end panel, additional-air inlet aperture surface area is not more than inlet end
/ 10th of panel air inlet open area.
The utility model provides a kind of diesel engine after-treatment system SCR urea mixer, including tubular steel shell
Body, the urea nozzle mounting base for being set to outer housing outer wall surface, in the mixer assembly of barrel-type casing interior forward end, mixer
There is spoiler at the rear portion of component；Mixer assembly ventilation end panel, is gone out by intake end panel, inlet chamber, air inlet, mixing chamber
Port etc. is constituted.The tail gas thermal current of diesel engine discharge enters mixing chamber through air inlet from the inlet chamber in intake end panel, with
The aqueous solution of urea that urea nozzle sprays into carries out high speed rotation ginseng and mixes, and then sprays from the exhaust outlet high speed of mixer ventilation end panel
The expansion mixing chamber in the middle part of mixer is injected, adequately mixing and pyrolysis are carried out, spoiler is passed through later and enters SCR catalyst
Selective catalytic reduction is chemically reacted, the nitrogen oxides in diesel engine hot exhaust gas is eliminated, reaches and meet state's VI discharge standard
Requirement.
The utility model provides a kind of diesel engine exhaust gas aftertreatment system SCR urea mixer, the mixer
Distinctive structure is configured to make full use of the exhaust heat exhaust gas flow of diesel engine to the aqueous solution of urea liquid being injected into
Drop is transmitted, is crushed, being atomized, and realizes the abundant atomization and hydrolysis of aqueous solution of urea, the hot tail with diesel engine discharge
Gas carries out full and uniform mixing, efficiently solves the problems, such as urea deposits and crystallization；The airflow homogeneity of the mixer and
Ammonia uniformity very well satisfies the emission request that state's VI emission regulation of diesel engine proposes；It is surveyed by engine pedestal
Examination and engine entrucking road test examination, the exhaust gas discharge for configuring the diesel engine after-treatment system discharge of the SCR mixer are full
Sufficient state VI discharge standard.
Detailed description of the invention
Fig. 1 is the SCR mixer structure appearance axonometric schematic diagram of the utility model embodiment；
Fig. 2 is the axial cross-sectional views of the SCR mixer structure in Fig. 1；
Fig. 3 is the structural schematic diagram after the SCR mixer removal barrel-type casing in Fig. 2；
Fig. 4 is that the structure of the SCR mixer assembly and mixing chamber in Fig. 3 constitutes schematic diagram；
Fig. 5 is the feature cross-section schematic diagram of the SCR mixer mixing chamber in Fig. 4, i.e., at urea nozzle mounting base center
Cross-sectional view；
Fig. 6 is the air flow direction schematic diagram in SCR mixer in Fig. 5 inside mixing chamber.
The label of each section is as follows in attached drawing:
1 is shell, and 2 be urea nozzle seat, and 3 be intake end panel, and 4 be inlet chamber, and 5 be air inlet, and 6 be mixing chamber, and 7 are
Spoiler, 8 be SCR catalyst, and 9 be ventilation end panel, and 10 be gas outlet, and 11 be drainage plate, and 12 be expansion mixing chamber, and 13 be axis
To shelves flowing plate, 14 be radial shelves flowing plate, and 15 be turbulence blades, and 16 be siding.
Specific embodiment
The present invention will be further described With reference to embodiment, and specific embodiment is to the utility model
The further explanation of principle, does not limit the utility model in any way, and technology same or like with the utility model does not have
Range beyond the utility model protection.
In conjunction with attached drawing.
Diesel engine exhaust gas aftertreatment system SCR urea mixer, including cylindrical housings 1 and set on shell 1
Urea nozzle seat 2,1 front-end and back-end of shell have flat panel and shell 1 to be tightly connected composition cylindrical cavity, cylindrical empty
Chamber is followed successively by mixing chamber 6, expansion mixing chamber 12, SCR catalyst 8 by front end to rear end；
Mixing chamber 6 includes: the intake end panel 3 of 1 front end of shell, and the outlet end face of mixing chamber is constituted with intake end panel 3
Plate 9, urea nozzle seat 2 are set on 1 wall of shell for constituting mixing chamber, and the opening of intake end panel 3 is simultaneously circumferentially set with along mixing chamber 6
The air inlet 5 set couples, and air inlet 5 is set to 2 weeks forward ends of urea nozzle seat, circumferentially arranged helical structure in mixing chamber 6
Drainage plate 11 with convergence survey feature, ventilation end panel 9 output 10 connection of port expansion mixing chamber 12；
Expansion mixing chamber 12 includes: ventilation end panel 9 and the cavity that 8 front end face of SCR catalyst is constituted, the axial middle part of cavity
It is disposed radially the spoiler 7 of changeable flowing gas state；
After 8 periphery wall of SCR catalyst and the sealing of 1 inner wall of shell are fixed and are set to expansion mixing chamber 12.
The opening of the utility model intake end panel 3 is located at 3 edge of intake end panel, opening and the wall axially arranged along shell
Plate 16 constitutes inlet chamber 4, and 16 front end of siding axially arranged is tightly connected with intake end panel 3, rear end and ventilation end panel 9 are close
Air inlet 5 is arranged along 6 circumferential openings of mixing chamber in envelope connection, siding 16.
Helical structure one end of drainage plate 11 is arranged in urea nozzle seat 2 weeks to the back-end, and spiral convergence rear end is arranged in out
Gas end plates 8 output port 10.
It is at least circumferential in axially wrapping gas outlet that 11 spiral convergence rear end of drainage plate is arranged in ventilation end panel gas outlet 10
2/3rds.
Ventilation end panel gas outlet 10 is located at ventilation end panel 9 close to marginal position, and gas outlet 10 is located at expansion mixing chamber
Axial shelves flowing plate 13 and radial shelves flowing plate 14 is arranged in 12 sides.
The setting of 7 surface of spoiler runs through uniform turbulence blades 15.
There are one or several auxiliary inlet ports in intake end panel, additional-air inlet aperture surface area is not more than intake end panel
/ 10th of air inlet open area.According to the needs of mixer apparatus practical application, auxiliary inlet port is for reducing mixing
The pressure loss of device；
Fig. 1 is the SCR mixer structure appearance axonometric drawing of the utility model embodiment, and SCR mixer includes barrel-type casing
1, urea nozzle seat 2, mixer intake end panel 3, inlet chamber 4, the air inlet 5 of 1 outer wall surface of shell are set to；From diesel oil
The hot exhaust gas of internal combustion engine discharge, the inlet chamber 4 reached in intake end panel 3 are entered in blender body by air inlet 5 later
Portion's mixing chamber 6.
Fig. 2 is the axial cross-sectional views of the SCR mixer structure in Fig. 1, and mixer includes barrel-type casing 1, urea spray
Mouth seat 2, spoiler 7, SCR catalyst 8；6 component of mixer mixing chamber of 1 interior forward end of barrel-type casing is set by air inlet end face
Plate 3, inlet chamber 4, air inlet 5, ventilation end panel 9 is equal to be constituted.Air inlet 5 and outlet on mixing chamber 6 and intake end panel 3
The exhaust outlet 10 of end plates 9 is connected, and the formation of mixing chamber 6 is constituted as shown in following figure 3.
Fig. 3 is the structure chart after the SCR mixer removal tubular steel sheel in Fig. 2, the inner cylindrical shell 1 of mixer
Internal structure, including mixer intake end panel 3, inlet chamber 4, air inlet 5, ventilation end panel 9, gas outlet 10, mixing chamber 6.
Mixing chamber 6 is one by cylindrical barrel-type casing 1, inlet chamber 4, air inlet 5, intake end panel 3, ventilation end panel 9, drainage plate
11 equal components are constituted, the runner chamber with convergence flow characteristics that 11 interior sidewall surface of drainage plate is formed, with mixer air inlet
Air inlet 5 on end plates 3 is connected with the exhaust outlet 10 of ventilation end panel 9.Diesel engine discharge hot exhaust gas air-flow from into
Inlet chamber 4 on gas end plates 3 is entered inside mixing chamber 6 by air inlet 5, high speed rotation and urea nozzle in mixing chamber 6
The aqueous solution of urea of penetrating carries out ginseng and mixes, and is then injected into mixer from 10 high speed of exhaust outlet of mixer ventilation end panel 9
The expansion mixing chamber 12 at rear portion carries out adequately mixing and pyrolysis, and the turbulence blades 15 eventually passed through on spoiler 7 enter SCR
Catalyst converter 8 eliminates in hot exhaust gas electing property of the nitrogen oxides catalysis reduction chemical reaction in diesel emission hot exhaust gas
Nitrogen oxides reaches and meets the requirement of state's VI discharge standard.As shown, in order to enhance mixed effect, it is swollen in exhaust outlet 10
Axial shelves flowing plate 13 and radial shelves flowing plate 14 is arranged in swollen 12 side of mixing chamber.
Fig. 4 is the structure configuration diagram of the SCR mixer assembly and mixing chamber 6 in Fig. 3；Mixer assembly include mixer into
Gas end plates 3, inlet chamber 4, air inlet 5, ventilation end panel 9, gas outlet 10, siding 16.Mixing chamber 6 is one by tubular steel shell
What the components interior sidewall surfaces such as body 1, inlet chamber 4, air inlet 5, intake end panel 3, ventilation end panel 9, drainage plate 11 were formed has
The runner chamber of convergence flow characteristics, as shown in Figure 5, mixing chamber 6 is with the air inlet 5 in mixer intake end panel 3 and out
The exhaust outlet 10 of gas end plates 9 is connected.Diesel engine discharge hot exhaust gas from the inlet chamber 4 in intake end panel 3 by into
Port 5 enters inside mixing chamber 6, and the aqueous solution of urea that high speed rotation and urea nozzle spray into mixing chamber 6 carries out ginseng and mixes, so
The expansion mixing chamber 12 at mixer rear portion is injected into from 10 high speed of exhaust outlet of mixer ventilation end panel 9 afterwards, is carried out abundant
Mixing and pyrolysis, then pass through spoiler 7 enter SCR catalyst 8 in carry out selective catalytic reduction chemical reaction, eliminate heat
Nitrogen oxides in tail gas reaches and meets the requirement of state's VI discharge standard.
Fig. 5 is the constructional cross sectional view of the SCR mixer mixing chamber 6 in Fig. 1, is illustrated as at urea nozzle mounting base center
Cross section；Mixing chamber 6 be one radially by cylindrical barrel-type casing 1, inlet chamber 4, air inlet 5, intake end panel 3, go out
The components interior sidewall surfaces such as port 10 are formed by the interior sidewall surface of intake end panel 3, ventilation end panel 9 in axial direction, and are had and received
The runner chamber of holding back property flow characteristics.The hot exhaust gas of diesel engine discharge is from the inlet chamber 4 in intake end panel through air inlet 5
Into after 6 inside of mixing chamber, high speed rotation flowing is carried out along the inner wall of shell 1, the urea water sprayed into urea nozzle
Solution ginseng is mixed, then from 10 high speed ejection of exhaust outlet of mixer ventilation end panel, into the expansion mixing chamber at mixer rear portion
12, carry out adequately mixing and pyrolysis.
Fig. 6 is the air flow direction schematic diagram in SCR mixer in Fig. 5 inside mixing chamber 6.The hot exhaust gas of diesel engine discharge
After from the process air inlet 5 of inlet chamber 4 into mixer mixing chamber 6, high speed rotation flowing is carried out along the inner wall of shell 1,
The aqueous solution of urea ginseng sprayed into urea nozzle seat 2 is mixed, and high speed rotation flows it in the mixing chamber 6 of convergence flow characteristics
Afterwards, it is injected into the expansion mixing chamber 12 at mixer rear portion by 10 high speed of exhaust outlet in mixer ventilation end panel 9, is filled
The pyrolysis and uniform mixing divided then passes through spoiler 7 and enters the progress selective catalytic reduction chemical reaction of SCR catalyst 8,
The nitrogen oxides in diesel engine hot exhaust gas is eliminated, the requirement of state's VI discharge standard is reached and meet.
The cross section of the enterprising air cavity 4 of SCR mixer intake end panel 3 in the present embodiment can use any geometric form
Shape, the air inlet 5 axially arranged can according to the needs of mixer apparatus practical application, 3 in intake end panel on increase
Add one or several apertures, with additional-air inlet, reduces the pressure loss of SCR mixer.
Claims (7)
1. a kind of diesel engine exhaust gas aftertreatment system SCR urea mixer, including cylindrical housings and set on shell
Urea nozzle seat, it is characterised in that: the housing forward end and rear end have flat panel to be hermetically connected with the shell composition cylinder
Cavity, cylindrical cavity are followed successively by mixing chamber, expansion mixing chamber, SCR catalyst by front end to rear end；
The mixing chamber includes: the intake end panel of housing forward end, and the ventilation end panel of mixing chamber, urine are constituted with intake end panel
Plain nozzle carrier is set on the housing wall for constituting mixing chamber, intake end panel opening and with the air inlet that is circumferentially arranged along mixing chamber
Connection, air inlet are set to urea nozzle seat week forward end, and circumferentially arranged helical structure has convergence survey special in mixing chamber
The drainage plate of sign, ventilation end panel output port connection expansion mixing chamber；
The expansion mixing chamber includes: ventilation end panel and the cavity that SCR catalyst front end face is constituted, and the axial middle part of cavity is along diameter
To the spoiler for being provided with changeable flowing gas state；
After the SCR catalyst periphery wall and inner walls sealing are fixed and are set to expansion mixing chamber.
2. diesel engine exhaust gas aftertreatment system according to claim 1 SCR urea mixer, it is characterised in that:
The intake end panel opening is located at intake end panel edge, and opening constitutes inlet chamber, axis with the siding axially arranged along shell
To the siding front end of arrangement and intake end panel are tightly connected, rear end and ventilation end panel are tightly connected, siding is along mixing chamber week
To opening, air inlet is set.
3. diesel engine exhaust gas aftertreatment system according to claim 1 SCR urea mixer, it is characterised in that:
Helical structure one end of the drainage plate is arranged in urea nozzle seat week to the back-end, and spiral convergence rear end is arranged in ventilation end panel
Output port.
4. diesel engine exhaust gas aftertreatment system according to claim 3 SCR urea mixer, it is characterised in that:
Drainage plate spiral convergence rear end is arranged in ventilation end panel gas outlet at least in axially wrapping gas outlet circumferential 2/3rds.
5. diesel engine exhaust gas aftertreatment system according to claim 1 or 2 or 3 or 4 SCR urea mixer,
Be characterized in that: the ventilation end panel outputs port and is located at ventilation end panel close to marginal position, and gas outlet is located at expansion mixing
Axial shelves flowing plate and radial shelves flowing plate is arranged in chamber side.
6. diesel engine exhaust gas aftertreatment system according to claim 5 SCR urea mixer, it is characterised in that:
The flow-disturbing plate surface setting runs through uniform turbulence blades.
7. diesel engine exhaust gas aftertreatment system according to claim 5 SCR urea mixer, it is characterised in that:
There are one or several auxiliary inlet ports in the intake end panel, additional-air inlet aperture surface area is not more than intake end panel air inlet
/ 10th of open area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162157.0U CN209385209U (en) | 2018-12-23 | 2018-12-23 | A kind of diesel engine after-treatment system SCR urea mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162157.0U CN209385209U (en) | 2018-12-23 | 2018-12-23 | A kind of diesel engine after-treatment system SCR urea mixer |
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| Publication Number | Publication Date |
|---|---|
| CN209385209U true CN209385209U (en) | 2019-09-13 |
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ID=67873351
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822162157.0U Active CN209385209U (en) | 2018-12-23 | 2018-12-23 | A kind of diesel engine after-treatment system SCR urea mixer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653843A (en) * | 2018-12-23 | 2019-04-19 | 中自环保科技股份有限公司 | A kind of diesel engine after-treatment system SCR urea mixer |
| CN110657007A (en) * | 2019-10-31 | 2020-01-07 | 中自环保科技股份有限公司 | SCR urea mixer for diesel internal combustion engine aftertreatment system |
-
2018
- 2018-12-23 CN CN201822162157.0U patent/CN209385209U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653843A (en) * | 2018-12-23 | 2019-04-19 | 中自环保科技股份有限公司 | A kind of diesel engine after-treatment system SCR urea mixer |
| CN110657007A (en) * | 2019-10-31 | 2020-01-07 | 中自环保科技股份有限公司 | SCR urea mixer for diesel internal combustion engine aftertreatment system |
| CN110657007B (en) * | 2019-10-31 | 2020-06-30 | 中自环保科技股份有限公司 | SCR urea mixer for diesel internal combustion engine aftertreatment system |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 611731 No. 88, Gu Nan Street, hi tech Zone, Chengdu City, Sichuan Province Patentee after: Zhongzi Technology Co.,Ltd. Country or region after: China Address before: 611731 No. 88, Gu Nan Street, hi tech Zone, Chengdu City, Sichuan Province Patentee before: Sinocat Environmental Technology Co.,Ltd. Country or region before: China |
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