CN207813704U - A kind of static mixer for diesel engine vent gas post-processing - Google Patents
A kind of static mixer for diesel engine vent gas post-processing Download PDFInfo
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- CN207813704U CN207813704U CN201820135827.7U CN201820135827U CN207813704U CN 207813704 U CN207813704 U CN 207813704U CN 201820135827 U CN201820135827 U CN 201820135827U CN 207813704 U CN207813704 U CN 207813704U
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- diesel engine
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- static mixer
- mixing tube
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Abstract
The utility model discloses a kind of static mixers for diesel engine vent gas post-processing, including mixing tube and blade, blade are screw type, several trepannings have been evenly arranged on blade, blade is coaxially disposed in mixing tube, and blade can also spiral and be connected in connecting rod, then be set in mixing tube.The mixed airflow of tail gas and urea liquid repeatedly mutually mixes when passing through mixing tube, reaches abundant, the uniform purpose of mixing, enters back into exhaust gas treating device and react.
Description
Technical field
The utility model patent is related to diesel engine vent gas after-treatment system field, specifically a kind of to be used for diesel oil tail
The static mixer of gas post-processing.
Background technology
Diesel motor exhaust SCR technology (SCR) is post-processed outside a kind of machine of vehicle diesel engine
Technology can be effectively improved the discharge of Diesel NOx, and insensitive to diesel oil sulfur content.The technology in exhaust pipe by spraying
Enter certain density urea liquid, urea liquid is ejected through the injection unit that diesel engine vent gas is handled to realize.If urine
Ammonia (the NH of element pyrolysis3) be unevenly distributed oxynitrides (NOx) transformation efficiency can be caused too low.If urea is sprayed simultaneously
It penetrates in the lower wall surface of temperature, is easy formation crystallization and is deposited on wall surface, exhaust pipe can be blocked when serious, causes to start motor-driven
Power performance declines.Improving the mixed effect of ammonia helps to reduce crystallization risk and can improve the utilization rate of urea.
Since arrangement space is limited, being vented also is influenced by it with the blending space of urea, and urea is easy due to hitting
Wall and generate crystalline polamer.In addition, difference of the existing injection unit due to mounting means, to motor exhaust after-treatment system
Arrangement require also different, while increasing the complexity of diesel engine vent gas after-treatment system structure.
It is necessary to provide a kind of mixed structures improving ammonia mixed effect, to solve urea in SCR using mistake
The problem of journey.
Invention content
The purpose of this utility model, it is good to be to provide a good mixing effect, air flow method effect, can be used for it is a variety of not
With the exhaust aftertreatment static mixer of structure type diesel engine.
In order to achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of static mixer for diesel engine vent gas post-processing, including mixing tube and blade, the blade are spiral shell
Rotation type, several trepannings have been evenly arranged on blade, and blade is coaxially disposed in mixing tube.The design of the utility model structure, makes
It obtains a part of mixed airflow and the helical channel that air-flow introduces between blade is carried out by rotation mixing by blade, another part is mixed
Close trepanning 1 of the air-flow across blade on and enter helical channel blade, and rotation mixed airflow is broken mixes, tail gas and
Urea liquid reaches abundant, the uniform purpose of mixing by repeatedly mutually mixing.
Preferably, the outlet of one end connection tail gas and urea liquid of the mixing tube, the other end connect exhaust gas treating device
Air inlet.Tail gas and urea liquid enter back into exhaust gas treating device and react after blade reaches mixed effect.
Preferably, further include connecting rod, in mixing tube, the blade spirals connection for connecting rod coaxial arrangement
In in connecting rod.Certainly, blade can also be fixed on mixing inside pipe wall.
Preferably, the percent opening of the blade is 30%~40%.
Preferably, the blade quantity is 2-4 pieces, and quantity can be determined according to the back pressure of generation.
Preferably, the relationship of the blade axial length L and the pitch P of blade is：0.5P≤L≤P.
Preferably, the cross sectional shape of the edge of the blade and mixing tube coordinates, the edge fitting mixing inside pipe wall of blade.
Preferably, the mixing tube is pipe, and the plane projection of the blade is fan-shaped or round, and the quantity of blade is
4.
Preferably, the blade is equidistant, is arranged in parallel, i.e., is arranged in parallel between blade and blade, apart from equal, Neng Gougeng
Mixed tail gas and urea liquid well reach the equally distributed effect of mixed airflow.
Preferably, the cross section of the mixing tube is runway shape, and mixing tube can also be other shapes, can be mounted on structure
It is more compact in diesel engine vent gas processor.
Preferably, the mixer further includes connecting rod, and connecting rod coaxial arrangement is in mixing tube, the leaf
Piece, which spirals, to be connected in connecting rod.
The utility model has the following advantages that：
1) the utility model good mixing effect can be mounted in a variety of exhaust gas treating device air inlet pipe of different shapes.
2) due to being evenly arranged trepanning on blade, the back pressure of static mixer generation can be reduced as far as possible.
3) since blade is to arrange trepanning on screw type and blade, urea desorption column can be improved, and reduce crystallization risk.
Description of the drawings
Fig. 1 is a kind of static mixer structure schematic diagram for diesel engine vent gas post-processing of the utility model；
Fig. 2 is the utility model blade construction schematic diagram；
Fig. 3 is the structural schematic diagram of 2 blades of the utility model combination；
Fig. 4 is that a kind of static mixer structure for diesel engine vent gas post-processing that cross section is runway shape mixing tube is shown
It is intended to.
In figure, 1-mixing tube；2-blades；21-trepannings；3-connecting rods.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.
Embodiment as illustrated in fig. 1 and 2, including mixing tube 1, blade 2 and connecting rod 3, mixing tube 1 are pipe, connecting rod 3
It is coaxially disposed in mixing tube 1, blade 2 is screw type, has been evenly arranged several trepannings 21 on blade 2, blade 2, which spirals, to be connected to
In connecting rod 3, blade 2 is located in mixing tube 1, and the plane projection of blade 2 is circle, and 2 quantity of blade is 4, the axial direction of blade 2
Length is the half of 2 screw pitch of blade, and the edge of blade 2 is bonded 1 inner wall of mixing tube.One end connection tail gas and urea of mixing tube 1
The outlet of solution, the other end connect the air inlet of exhaust gas treating device.Tail gas and urea liquid reach mixed effect by blade 2
Afterwards, exhaust gas treating device is entered back into react.
Embodiment as shown in Figure 3,2 quantity of blade in mixing tube 1 are 2, and the axial length of blade 2 is 2 spiral shell of blade
Away from half, the face-to-face spiral of blade is connected in connecting rod, and mixing tube 1, which is divided into 2 spirals, fills channels.
The cross section of embodiment as shown in Figure 4, mixing tube 1 is runway shape, and mixing tube 1 can also be other shapes, can
It is more compact in diesel engine vent gas processor mounted on structure.
A kind of mixed method of static mixer for diesel engine vent gas processing of the utility model, steps are as follows：
The mixed airflow of tail gas and urea liquid enters 2 region of blade, a part of gaseous mixture circulation by mixing tube 1
It crosses blade 2 and the helical channel that air-flow introduces between blade 2 is subjected to rotation mixing, another part mixed airflow passes through on blade
Trepanning 21 enter the helical channel between blade 2, and rotation mixed airflow is broken mix, and tail gas passes through more with urea liquid
It is secondary mutually to mix, reach abundant, the uniform purpose of mixing.
Embodiment described above is a kind of preferable scheme of the utility model, and so it is not to limit this practicality
It is novel.Those of ordinary skill in technical field can be in the case where not departing from the spirit and scope of the utility model
It makes a variety of changes and modification.Therefore all technical solutions for taking the mode of equivalent substitution or equivalent transformation to be obtained, all fall within
In the scope of protection of the utility model.
Claims (10)
1. a kind of static mixer for diesel engine vent gas post-processing, which is characterized in that including mixing tube (1) and blade (2),
The blade (2) is screw type, and several trepannings (21) have been evenly arranged on blade (2), and blade (2) is coaxially disposed in mixing tube
(1) in.
2. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the mixing tube
(1) outlet of one end connection tail gas and urea liquid, the other end connect the air inlet of exhaust gas treating device.
3. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the blade
(2) percent opening is 30%~40%.
4. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the blade
(2) quantity is 2-4 pieces.
5. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the blade
(2) relationship of axial length L and the pitch P of blade (2) is：0.5P≤L≤P.
6. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the blade
(2) cross sectional shape at edge and mixing tube (1) coordinates, and the edge of blade (2) is bonded mixing tube (1) inner wall.
7. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the mixing
It is pipe to manage (1), and the plane projection of the blade (2) is fan-shaped or round, and the quantity of blade (2) is 4.
8. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the blade
(2) equidistant, be arranged in parallel.
9. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that the mixing tube
(1) cross section is runway shape.
10. the static mixer for diesel engine vent gas post-processing as described in claim 1, which is characterized in that further include connecting
Extension bar (3), in mixing tube (1), the blade (2), which spirals, is connected to connecting rod (3) for the connecting rod (3) coaxial arrangement
On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135827.7U CN207813704U (en) | 2018-01-26 | 2018-01-26 | A kind of static mixer for diesel engine vent gas post-processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820135827.7U CN207813704U (en) | 2018-01-26 | 2018-01-26 | A kind of static mixer for diesel engine vent gas post-processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207813704U true CN207813704U (en) | 2018-09-04 |
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ID=63325281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820135827.7U Active CN207813704U (en) | 2018-01-26 | 2018-01-26 | A kind of static mixer for diesel engine vent gas post-processing |
Country Status (1)
| Country | Link |
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| CN (1) | CN207813704U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542555A (en) * | 2022-01-27 | 2022-05-27 | 约克广州空调冷冻设备有限公司 | Current equalizing device and current dividing device |
| WO2023115725A1 (en) * | 2021-12-21 | 2023-06-29 | 潍柴动力股份有限公司 | Scr mixer and vehicle |
-
2018
- 2018-01-26 CN CN201820135827.7U patent/CN207813704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023115725A1 (en) * | 2021-12-21 | 2023-06-29 | 潍柴动力股份有限公司 | Scr mixer and vehicle |
| CN114542555A (en) * | 2022-01-27 | 2022-05-27 | 约克广州空调冷冻设备有限公司 | Current equalizing device and current dividing device |
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