CN210239799U - SCR urea mixer and diesel engine - Google Patents
SCR urea mixer and diesel engine Download PDFInfo
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- CN210239799U CN210239799U CN201921020274.1U CN201921020274U CN210239799U CN 210239799 U CN210239799 U CN 210239799U CN 201921020274 U CN201921020274 U CN 201921020274U CN 210239799 U CN210239799 U CN 210239799U
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Abstract
The utility model discloses a SCR urea mixer and diesel engine, wherein SCR urea mixer includes the barrel and sets up the mixing plate in the barrel, and the mixing plate is the spiral plate, forms first gas circulation mouth between the adjacent lateral wall in the outside of spiral plate, and the first end of axis direction of spiral plate forms the second gas circulation mouth with first gas circulation mouth intercommunication, sets up the first broken hole that a plurality of confession gas passed through on the spiral plate, forms spiral airflow channel between two adjacent lateral walls of spiral plate. In the SCR urea mixer that this application provided, urea liquid gets into spiral airflow channel along with gas, and urea liquid drop realizes urea liquid drop atomizing through first broken hole and then with urea liquid drop breakage under the action of gravity, and then prevents the urea deposit, consequently, urea deposit volume reduces in the SCR urea mixer that this application provided.
Description
Technical Field
The utility model relates to a SCR system technical field, in particular to SCR urea blender. The utility model discloses still relate to a diesel engine including above-mentioned SCR urea blender.
Background
The SCR (Selective Catalytic Reduction) refers to Selective Reduction of NOx in flue gas to non-toxic N by reducing agents (ammonia, urea, hydrocarbon, etc.) under a certain temperature range and catalyst action2And H2And O. Reactions that occur during the SCR reaction include: decomposition of urea, NO3Adsorption, desorption of NO3Oxidation, standard SCR reaction, fast SCR reaction, slow SCR reaction, etc.
The problem that deposits such as urea crystal stones are easily generated when a diesel vehicle of the SCR system runs under low-load conditions is always a main factor influencing the stable running of the vehicle. Wherein, during the running process of the vehicle, the sprayed urea liquid drops can not be converted into NH in real time due to poor urea atomization, uneven mixing or insufficient decomposition3But rather, by-products are formed, causing instability in the reduction reaction, thereby affecting the consistency of NOx emissions and conversion efficiency. Urea deposits can be classified into urea crystals and urea stones, depending on the formation process.
Traditional SCR urea mixer includes the barrel and sets up the blade in the barrel, and discharge after the mist gets into the barrel through the blade whirl, however, the blade only leads gas and urea dropping liquid, and unable effective broken urea dropping liquid, urea are at SCR urea mixer deposit. If the urea can not be completely decomposed in time, the urea can be continuously grown by taking the urea as a pronucleus, and urea crystal stones are finally formed due to incomplete decomposition, and the urea crystal stones can be accumulated to a certain extent to block a urea flow channel.
Therefore, how to reduce the deposition of urea in the SCR urea mixer is a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a SCR urea mixer, urea deposit volume reduces in this SCR urea mixer. Another object of the present invention is to provide a diesel engine including the above SCR urea mixer.
In order to realize the above object, the utility model provides a SCR urea blender, be in including barrel and setting mixing plate in the barrel, mixing plate is the spiral plate, form first gas circulation mouth between the adjacent lateral wall in the outside of spiral plate, the first end of axis direction of spiral plate forms the second gas circulation mouth with first gas circulation mouth intercommunication, set up the first broken hole that a plurality of confession gas passed through on the spiral plate, form spiral airflow channel between two adjacent lateral walls of spiral plate.
Preferably, the spiral plate sets up the inlet end of barrel, first gas circulation mouth with the air inlet of barrel is connected, second gas circulation mouth does the gas outlet of spiral plate, on the axis direction of spiral plate with the second end that second gas circulation mouth set up dorsad with the sealed laminating of barrel inner wall.
Preferably, the exhaust device further comprises an exhaust baffle, wherein the exhaust baffle is arranged at the first end of the spiral plate and is fixedly connected with the first end of the spiral plate.
Preferably, at least the outermost plate body of the spiral plate is hermetically connected with the adjacent plate body of the spiral plate through the air outlet baffle plate.
Preferably, the outer peripheral plate of the spiral plate, which is opposite to the cylinder body, is a closed plate body, the first crushing hole is formed in the inner spiral part of the spiral plate, and the first gas circulation port is located in the center of the spiral plate.
Preferably, the width of spiral board equals, just the spiral board first end with the second end be respectively the relative both ends of width direction, first end with the second end all sets up flushly.
Preferably, the plurality of first crushing holes are arranged in an array.
Preferably, still including setting up the inside perforated plate of barrel, along the gas flow direction, the perforated plate is located spiral plate low reaches, be equipped with the broken hole of a plurality of seconds on the perforated plate.
Preferably, the porous plate comprises a gas guide part and a hole opening part arranged on the periphery of the gas guide part, the periphery of the hole opening part is circumferentially and hermetically connected with the inside of the cylinder, the center of the gas guide part is arranged in a protruding manner towards the upstream of the gas flowing direction, the second crushing holes are circumferentially arranged on the hole opening part, and the middle of the hole opening part is arranged in a protruding manner towards the downstream of the gas flowing direction.
A diesel engine comprises an injector and an SCR urea mixer communicated with the injector, wherein the SCR urea mixer is any one of the SCR urea mixers.
In the technical solution, the utility model provides a SCR urea blender includes the barrel and sets up the mixed plate in the barrel, and the mixed plate is the spiral plate, forms first gas circulation mouth between the adjacent lateral wall in the outside of spiral plate, and the first end of axis direction of spiral plate forms the second gas circulation mouth with first gas circulation mouth intercommunication, sets up the first broken hole that a plurality of confession gas passed through on the spiral plate, forms spiral airflow channel between two adjacent lateral walls of spiral plate. When the SCR urea mixer is installed, the spiral plate is installed inside the cylinder body, one of the first gas circulation port and the second gas circulation port is an air inlet, and the other one of the first gas circulation port and the second gas circulation port is an air outlet.
Can know through the above-mentioned description, in the SCR urea mixer that this application provided, urea liquid gets into spiral gas flow channel along with gas, and urea liquid drop realizes urea liquid drop atomizing through first broken hole and then with urea liquid drop breakage under the action of gravity, and then prevents the urea deposit, consequently, urea deposit volume reduces in the SCR urea mixer that this application provided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram of an installation position of an SCR urea mixer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first viewing angle of a spiral plate according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the spiral plate of FIG. 2 from a second perspective;
FIG. 4 is a schematic diagram of the spiral plate of FIG. 2 from a third perspective;
FIG. 5 is a schematic diagram of the spiral plate of FIG. 2 at a fourth viewing angle;
FIG. 6 is a schematic diagram of a fifth perspective view of the spiral plate shown in FIG. 2;
fig. 7 is a schematic structural diagram of another spiral plate according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a perforated plate according to an embodiment of the present invention;
fig. 9 is a three-dimensional structure diagram of a multi-well plate according to an embodiment of the present invention.
Wherein in FIGS. 1-9:
1. a barrel;
2. a barrel air inlet;
3. a spiral plate; 3-1, a peripheral plate; 3-2, an air outlet baffle; 3-3, first crushing holes; 3-4, a second gas flow port; 3-5, a first gas flow port;
4. a perforated plate; 4-1, a hole body opening part; 4-2, a gas guide part; 4-3, and a second crushing hole.
Detailed Description
The core of the utility model is to provide a SCR urea mixer, urea deposit volume reduces in this SCR urea mixer. The other core of the utility model is to provide a diesel engine including above-mentioned SCR urea blender.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 to fig. 9.
In a specific implementation mode, the utility model discloses the SCR urea blender that specific embodiment provided includes barrel 1 and sets up the mixing plate in barrel 1. In particular, the cylinder 1 is preferably a cylindrical cavity structure, and the opening of the cylinder 1 is arranged on the circumferential surface. Preferably, the mixing plate is arranged at the location of the cartridge inlet 2. In order to prolong the service life of the SCR urea mixer, the cylinder 1 and the mixing plate are preferably made of metal, and preferably made of high-temperature-resistant metal.
The mixing plate is a spiral plate 3, a first gas circulation port 3-5 is formed between adjacent side walls on the outermost side of the spiral plate 3, a second gas circulation port 3-4 communicated with the first gas circulation port 3-5 is formed at the first end of the spiral plate 3 in the axis direction, a plurality of first crushing holes 3-3 for gas to pass through are formed in the spiral plate 3, and a spiral gas flow channel is formed between two adjacent side walls of the spiral plate 3. Specifically, in order to facilitate the processing of the first crushing holes 3-3, preferably, the first crushing holes 3-3 are round holes, and the arrangement of the first crushing holes 3-3 can be arranged according to the actual needs of the root.
Specifically, the plurality of first crushing holes 3-3 are arranged in an array. Of course, the number of the first crushing holes 3-3 of the spiral plate 3 is gradually increased or gradually decreased along the gas flow direction.
Wherein, the spiral number of turns of spiral board 3 and the number of first broken hole 3-3 are decided according to actual need, and specifically, the interval between two adjacent spiral portions can equal or not be equal, and for the convenience of urea liquid drop breakage, preferably, the interval between two adjacent spiral portions in spiral board 3 is not equal.
When the SCR urea mixer is installed, the spiral plate 3 is installed inside the cylinder 1, and one of the first gas flow port 3-5 and the second gas flow port 3-4 is an air inlet and the other is an air outlet.
It can be known from the above description that in the SCR urea mixer provided in this application embodiment, urea liquid enters the spiral gas flow channel along with gas, and urea liquid drop is broken through first broken hole 3-3 under the action of gravity, realizes urea liquid drop atomizing, and then prevents urea deposit, and consequently, urea deposit volume reduces in the SCR urea mixer that this application provided.
Preferably, the spiral plate 3 is arranged at the air inlet end of the cylinder body 1, the first gas circulation port 3-5 is connected with the air inlet of the cylinder body 1, the second gas circulation port 3-4 is the air outlet of the spiral plate 3, and the second end of the spiral plate 3, which is arranged opposite to the second gas circulation port 3-4 in the axial direction, is in sealing fit with the inner wall of the cylinder body 1.
In a specific embodiment, the SCR urea mixer further comprises an air outlet baffle 3-2, and the air outlet baffle 3-2 is arranged at the first end of the spiral plate 3 and is fixedly connected with the first end of the spiral plate 3. Specifically, the air outlet baffle 3-2 is preferably a metal plate, and the air outlet baffle 3-2 is welded on the spiral plate 3.
In order to increase the gas path, it is preferable that at least the outermost plate body of the spiral plate 3 and the plate body of the adjacent spiral plate 3 are hermetically connected by the gas outlet baffle 3-2. Specifically, the air outlet baffle 3-2 is welded with the spiral plate 3.
Preferably, the outer circumferential plate 3-1 of the spiral plate 3, which is opposite to the cylinder 1, is a closed plate, and the first crushing hole 3-3 is arranged on the inner spiral part of the spiral plate 3, wherein the inner spiral part is the inner circumferential spiral part of the spiral plate 3. The first gas flow port 3-5 is located in the centre of the spiral plate 3. The gas is discharged through the first gas flow openings 3-5 during the flow process, and the gas path is extended, so that urea droplets can be sufficiently atomized.
For the convenience of processing and installation SCR urea mixer, preferably, the width of spiral plate 3 equals, and the first end and the second end of spiral plate 3 are the relative both ends of width direction respectively, and first end and second end all flush the setting.
In addition to the above aspects, the SCR urea mixer preferably further includes a perforated plate 4 disposed inside the barrel 1, wherein the perforated plate 4 is located downstream of the spiral plate 3 along the gas flowing direction, and the perforated plate 4 is provided with a plurality of second crushing holes 4-3. The unique mixed structure design strengthens the disturbance effect of air flow, promotes the atomization and decomposition of urea and prevents the urea from depositing. The combined structure design of the spiral pipe and the perforated plate 4 has good mixing uniformity and effectively avoids the deposition of urea on the pipe wall.
Preferably, the porous plate 4 comprises a gas guide part 4-2 and a hole body opening part 4-1 arranged at the periphery of the gas guide part 4-2, the periphery of the hole body opening part 4-1 is connected with the inner circumference of the cylinder 1 in a sealing way, the center of the gas guide part 4-2 is arranged outwards towards the upstream of the gas flow direction, and the gas guide part 4-2 guides the gas. The second crushing holes 4-3 are circumferentially arranged on the hole body opening part 4-1, and the middle position of the hole body opening part 4-1 is convexly arranged towards the downstream of the gas flowing direction.
When the engine is installed, the porous plate 4 can be positioned at the side part of the spiral plate 3 and can be positioned below the spiral plate 3 according to the requirement of an actual installation position.
This application is protruding through spiral plate 3 and centre and is set up, and the tail gas that will get into through spiral plate 3 is high-speed rotatory, wraps up and takes away the urea that erupts, and urea liquid drop is atomized with the fast evaporation of first broken hole 3-3 contact under the effect of high-speed rotatory air current, has reduced the contact with the urea mixing tube wall, further breaks the urea liquid drop that drops under the action of gravity through perforated plate 4. To the engine of the different usage of different discharge capacities, carry out the fine setting of structure according to the operating condition of engine, specifically can adjust the flow area and the number of turns of 3 air current imports of spiral plate, realize the rational distribution to the airflow, realize with the reasonable matching of engine.
The SCR urea mixer has no complex connecting and mounting structure and high reliability. The universality and the modular design concept are realized, and the whole vehicle arrangement is simpler.
The application provides a diesel engine, including the sprayer and with the SCR urea blender of sprayer intercommunication, wherein SCR urea blender is above-mentioned any kind of SCR urea blender. The foregoing describes a specific structure of the SCR urea mixer, and the present application includes the SCR urea mixer, which has the technical effects described above. DOC unit, DPF unit and SCR unit assemblies and devices are preferably employed in this application.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a SCR urea blender, includes barrel (1) and sets up mixing plate in barrel (1), its characterized in that, mixing plate is spiral plate (3), form first gas circulation mouth (3-5) between the adjacent lateral wall in the outside of spiral plate (3), the first end of axis direction of spiral plate (3) form with second gas circulation mouth (3-4) of first gas circulation mouth (3-5) intercommunication, set up first broken hole (3-3) that a plurality of confession gas passed through on spiral plate (3), form spiral airflow channel between two adjacent lateral walls of spiral plate (3).
2. SCR urea mixer according to claim 1, characterized in that the spiral plate (3) is arranged at the inlet end of the cylinder (1), the first gas flow opening (3-5) is connected to the inlet of the cylinder (1), the second gas flow opening (3-4) is the outlet of the spiral plate (3), and the second end of the spiral plate (3) facing away from the second gas flow opening (3-4) in the axial direction is in sealing engagement with the inner wall of the cylinder (1).
3. The SCR urea mixer of claim 1, further comprising an outlet baffle (3-2), wherein the outlet baffle (3-2) is disposed at the first end of the spiral plate (3) and is fixedly connected to the first end of the spiral plate (3).
4. SCR urea mixer according to claim 3, characterized in that at least the outermost plate of the spiral plates (3) is sealingly connected to the adjacent plate of the spiral plate (3) by means of the outlet baffle (3-2).
5. SCR urea mixer according to claim 1, characterized in that the peripheral plate (3-1) of the screw plate (3) arranged opposite to the cylinder (1) is a closed plate, that the first breaking holes (3-3) are arranged in the inner spiral of the screw plate (3), and that the first gas flow opening (3-5) is located in the centre of the screw plate (3).
6. SCR urea mixer according to claim 2, characterized in that the width of the spiral plates (3) is equal and that the first and second ends of the spiral plates (3) are the opposite ends in the width direction, respectively, both ends being arranged flush.
7. SCR urea mixer according to claim 1, wherein said first plurality of crushing holes (3-3) are arranged in an array.
8. SCR urea mixer according to any of the claims 1-7, further comprising a perforated plate (4) arranged inside the barrel (1), the perforated plate (4) being located downstream of the spiral plate (3) in the gas flow direction, the perforated plate (4) being provided with a plurality of second crushing holes (4-3).
9. The SCR urea mixer of claim 8, wherein the perforated plate (4) comprises a gas guide part (4-2) and a perforated part (4-1) arranged at the periphery of the gas guide part (4-2), the periphery of the perforated part (4-1) is circumferentially and hermetically connected with the inside of the barrel (1), the center position of the gas guide part (4-2) is convexly arranged at the upstream of the gas flowing direction, the second crushing holes (4-3) are circumferentially arranged on the perforated part (4-1), and the middle position of the perforated part (4-1) is convexly arranged at the downstream of the gas flowing direction.
10. A diesel engine comprising an injector and an SCR urea mixer in communication with the injector, characterized in that the SCR urea mixer is the SCR urea mixer of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921020274.1U CN210239799U (en) | 2019-06-30 | 2019-06-30 | SCR urea mixer and diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921020274.1U CN210239799U (en) | 2019-06-30 | 2019-06-30 | SCR urea mixer and diesel engine |
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| Publication Number | Publication Date |
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| CN210239799U true CN210239799U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921020274.1U Active CN210239799U (en) | 2019-06-30 | 2019-06-30 | SCR urea mixer and diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187591A (en) * | 2021-06-16 | 2021-07-30 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
| CN113187590A (en) * | 2021-06-18 | 2021-07-30 | 潍柴动力股份有限公司 | Aftertreatment blender and engine U type aftertreatment system |
-
2019
- 2019-06-30 CN CN201921020274.1U patent/CN210239799U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187591A (en) * | 2021-06-16 | 2021-07-30 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
| CN113187591B (en) * | 2021-06-16 | 2022-08-23 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
| CN113187590A (en) * | 2021-06-18 | 2021-07-30 | 潍柴动力股份有限公司 | Aftertreatment blender and engine U type aftertreatment system |
| WO2022262356A1 (en) * | 2021-06-18 | 2022-12-22 | 潍柴动力股份有限公司 | Post-treatment mixer and engine u-shaped post-treatment system |
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