CN220979625U - Post-treatment mixing device for diesel engine - Google Patents
Post-treatment mixing device for diesel engine Download PDFInfo
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- CN220979625U CN220979625U CN202322671177.1U CN202322671177U CN220979625U CN 220979625 U CN220979625 U CN 220979625U CN 202322671177 U CN202322671177 U CN 202322671177U CN 220979625 U CN220979625 U CN 220979625U
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- 238000002156 mixing Methods 0.000 title claims abstract description 34
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000004202 carbamide Substances 0.000 claims abstract description 49
- 238000005452 bending Methods 0.000 claims abstract description 27
- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 210000002268 wool Anatomy 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 33
- 229910021529 ammonia Inorganic materials 0.000 abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 24
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a diesel engine post-treatment mixing device, and relates to the technical field of diesel engine tail gas treatment. Including the barrel, be provided with toper swirl tube and vortex board in the barrel, the vortex board includes central centre of a circle district and periphery ring district, and central centre of a circle district is provided with a plurality of apertures, and periphery ring district is provided with a plurality of blades of bending, and the tip position cutting that the blade of bending is close to vortex board center forms blade cutting part, and the tip that the blade of bending is close to vortex board edge one side is provided with transition portion, and transition portion is for setting up towards vortex board central direction. The utility model designs the vortex plate structure and the air inlet dispersion plate structure, can keep the back pressure of the mixing device at a lower level, improves the evaporation of urea through the structural design, improves the uniformity of ammonia distribution and the uniformity of an exhaust flow field, and obviously improves the NOx conversion efficiency of tail gas pollutants.
Description
Technical Field
The utility model belongs to the technical field of diesel engine tail gas treatment, in particular to a diesel engine post-treatment mixing device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Diesel exhaust aftertreatment devices typically include a housing and a diesel catalytic oxidizer (DOC), a diesel particulate trap (DPF), and a Selective Catalytic Reducer (SCR) enclosed in the housing. To improve the performance of diesel exhaust aftertreatment devices, they also typically include a mixing device downstream of the Diesel Particulate Filter (DPF) and upstream of the Selective Catalytic Reduction (SCR).
As shown in fig. 1, the diesel engine aftertreatment mixing device in the prior art mostly adopts a porous pipe structure which is nested. The inventors have found that this type of mixing device often has the following technical problems:
(1) The back pressure of the post-treatment system is large, and the oil consumption is high;
(2) The urea spray is insufficiently uniformly mixed inside the mixer bore tube resulting in low conversion efficiency for NOx.
Therefore, the existing mixing device is unfavorable in mixing and evaporating conditions of urea spray, so that generated ammonia is insufficient, meanwhile, mixing uniformity of urea and gas cannot be well guaranteed, and NOx emission is difficult to reach the standard.
Disclosure of utility model
The utility model aims to provide a diesel engine aftertreatment mixing device, which is provided with a vortex plate structure and an air inlet dispersion plate structure, so that the back pressure of the mixing device can be kept at a lower level, the evaporation of urea is improved through the structural design, the uniformity of ammonia gas distribution and the uniformity of an exhaust flow field are improved, and the NOx conversion efficiency of tail gas pollutants is obviously improved.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
The utility model relates to a diesel engine aftertreatment mixing device, which comprises a cylinder, wherein a conical swirl tube and a vortex plate are arranged in the cylinder, a gas inlet and a gas outlet are arranged at two ends of the cylinder, the conical swirl tube is arranged at a position close to the gas inlet, and the vortex plate is arranged at one side of the conical swirl tube close to the gas outlet; the vortex plate comprises a central circle center area and an outer circumference circle area, wherein the central circle center area is provided with a plurality of small holes, the outer circumference circle area is provided with a plurality of bending blades, the end parts of the bending blades, which are close to the center of the vortex plate, are cut to form blade cutting parts, the end parts of the bending blades, which are close to one side of the edge of the vortex plate, are provided with transition parts, and the transition parts are arranged towards the center direction of the vortex plate.
Optionally, the central circle center area is arranged at the central position of the vortex plate, and the peripheral circle area is arranged at the peripheral side position of the vortex plate.
Optionally, a plurality of annular strip-shaped holes are formed in the peripheral annular region, bending blades are arranged in the strip-shaped holes, and an included angle between the bending blades and the vortex plate is 25-30 degrees.
Optionally, the blade cutting portion is a notch formed by cutting along an end of the bent blade near the center of the scroll plate to an end far from the center of the scroll plate.
Optionally, the small holes are uniformly distributed along the surface of the central circle center region, and the bending blades are distributed in a circumferential array along the surface of the peripheral ring region.
Optionally, an air inlet diffusing plate is arranged between the air inlet and the conical swirl tube, the air inlet diffusing plate is of an arc structure, and a plurality of holes are formed in the air inlet diffusing plate.
Optionally, steel wool is arranged at the bottom of the conical cyclone tube.
Optionally, a Z-shaped partition plate is further arranged in the cylinder body, and the Z-shaped partition plate is arranged between the conical swirl tube and the swirl plate; the Z-shaped partition plate comprises a horizontal portion and a vertical portion, a first hole is formed in the horizontal portion, the bottom of the conical cyclone tube is sleeved in the first hole, a second hole is formed in the vertical portion, and the second hole is used for accommodating the side wall of the conical cyclone tube.
Optionally, the vortex board is fixedly connected with the inner wall of the cylinder, and the size of the vortex board is matched with the inner diameter of the cylinder.
Optionally, the top of the cylinder is also provided with a urea injector, and the urea injector is used for injecting urea into the conical swirl tube; and a catalyst is further arranged at one side, close to the gas outlet, of the interior of the cylinder.
The utility model has the following beneficial effects:
1. The utility model discloses a diesel engine aftertreatment mixing device, which is provided with a vortex plate structure, wherein the bent blades of the vortex plate can promote the convection diffusion of ammonia components, and the uniformity of ammonia distribution on the downstream SCR end face is improved; the blade cutting part guides the air flow to pass through, and the low flow velocity phenomenon in the central circle center area and the blade cutting part area is avoided by matching with the action of the small hole structure on the central circle center area, so that the uniformity of flow velocity and the uniformity of ammonia distribution are further improved; the arrangement of the transition part of the bending blade guides the flow velocity direction of the air flow, so that the air flow is prevented from entering the outer edge position of the vortex plate too much, the uniformity of ammonia distribution is improved again, and the utilization rate of ammonia is improved.
2. The utility model designs the air inlet diffuser plate, improves the air inlet non-uniformity caused by the side air inlet pipe, simultaneously avoids the deviation of blowing urea spraying beams, and protects the uniform development of the urea spraying beams.
3. The combined mixer structure has compact and simple integral structure and reasonable distribution of each part, can balance space compactness and urea mixing uniformity, ensures that the NOx reducing agent is uniformly distributed, and is easy for assembly and arrangement.
Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a diesel engine aftertreatment mixing device of the prior art;
FIG. 2 is a schematic cross-sectional view of a diesel engine aftertreatment mixing device of the present disclosure;
FIG. 3 is a schematic view of the internal structure of the diesel engine aftertreatment mixing device of the present utility model;
FIG. 4 is a schematic perspective view of a scroll plate structure of the present utility model;
FIG. 5 is a schematic perspective view of another angular scroll plate structure of the present utility model;
FIG. 6 is a schematic view of a conical swirl tube according to the present utility model;
FIG. 7 is a schematic view of an air inlet dispersion plate structure according to the present utility model;
FIG. 8 is a schematic view of the structure of the Z-shaped separator of the present utility model;
FIG. 9 is a schematic view of the structure of the steel wool of the present utility model;
FIG. 10 is a schematic diagram of an SCR system of the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
The device comprises a cylinder body 1, a conical swirl tube 2, a swirl plate 3, a central circle center area 4, a peripheral circle area 5, small holes 6, 7 bent blades, 8 blade cutting parts, 9 transition parts, 10 strip-shaped holes, 11 air inlet diffusion plates, 12 steel wool, 13Z-shaped partition plates, a horizontal part 14, a vertical part 15, a first hole 16, a second hole 17, an 18 urea injector, a 19 catalyst and a 20 porous tube.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
SCR technology principle:
The basic principle of SCR technology is to inject fuel or add other reductant into the exhaust gas, select a suitable catalyst to promote the reaction of the reductant with NOx, while inhibiting oxidation of the reductant by oxygen in the exhaust gas. The existing SCR technology can be classified into urea SCR technology using NH3 generated by decomposition of urea as a reducing agent and hydrocarbon SCR technology using hydrocarbon as a reducing agent according to the kind of the reducing agent. At present, hydrocarbon SCR technology is still under further research and has little practical application; the urea SCR technology is mature and has more practical application.
The urea SCR system is shown in fig. 10, and mainly includes a catalyst, a urea injection pump, a urea tank, an injection control unit, a mixer, a urea aqueous solution temperature and level sensor, a urea aqueous solution mass sensor, an exhaust gas temperature sensor, a NOx sensor, and an NH3 sensor.
When diesel vehicles of the SCR system run under low load conditions, deposits such as urea crystallization stones are easy to generate, and the problem is always a main factor affecting the stable running of the vehicles. In the running process of the vehicle, urea droplets injected cannot be converted into NH3 in real time due to poor atomization, uneven mixing or insufficient decomposition of the urea, byproducts are generated, and the reduction reaction is unstable, so that the consistency of NOx emission and the conversion efficiency are affected.
Urea deposits can be classified according to the process of formation into urea crystals and urea stones:
The urea crystallization is generated by precipitation of supersaturated urea of the urea solution due to water loss in the urea solution, is a product in the physical reaction process, and can be continuously decomposed along with the rise of the temperature; urea stones are by-products generated by side reactions in the urea decomposition process, belong to chemical reaction products, and can be decomposed at a higher temperature.
Since the mass of urea liquid drops is much larger than that of gas, crystals formed in the gas flow stagnation area remain, and if the crystals cannot be completely decomposed in time, the crystals can be used as prokaryotes to grow continuously, and urea crystal stones are finally formed due to the incomplete decomposition, and the urea crystal stones can be accumulated to a certain degree to possibly block a urea flow channel.
Therefore, poor atomization, uneven mixing, or insufficient decomposition of urea during vehicle operation may eventually bring about serious consequences. Besides affecting the consistency of NOx emission and conversion efficiency, the urea flow channel can be blocked, thereby causing structural damage and affecting the service life of equipment.
The diesel engine post-treatment mixing device in the porous pipe nested form in the prior art cannot well meet the technical requirements, and has a plurality of hidden dangers and defects in the actual use process.
Embodiment one:
Referring to fig. 2 and 3, the utility model provides a diesel engine aftertreatment mixing device, which comprises a cylinder body 1, wherein a conical swirl tube 2 and a swirl plate 3 are arranged in the cylinder body 1, the swirl plate 3 is fixedly connected with the inner wall of the cylinder body 1, and the size of the swirl plate 3 is matched with the inner diameter of the cylinder body 1. The two ends of the cylinder body 1 are provided with a gas inlet and a gas outlet, the conical swirl tube 2 is arranged at a position close to the gas inlet, and the swirl plate 3 is arranged at one side of the conical swirl tube 2 close to the gas outlet. The reason of this setting is in order to be convenient for when spraying urea to conical swirl tube 2, makes urea and the gaseous co-mingling that sprays in conical swirl tube 2, avoids the urea of spraying to continuously show the thigh form, causes adverse effect to follow-up urea and ammonia homogeneity.
As shown in fig. 4 and 5, for convenience of description, the scroll plate 3 in this embodiment includes a central center region 4 and an outer peripheral annular region 5, the central center region 4 being disposed at a central position of the scroll plate 3, and the outer peripheral annular region 5 being a peripheral side position of the scroll plate 3.
The center circle center area 4 is provided with a plurality of small holes 6, the peripheral annular area 5 is provided with a plurality of bending blades 7, the small holes 6 are uniformly distributed along the surface of the center circle center area 4, and the bending blades 7 are distributed in a circumferential array along the surface of the peripheral annular area 5. The communication from the gas inlet to the gas outlet of the cavity in the cylinder body 1 is realized through the small holes 6 and the bending blades 7.
The scroll plate 31 structure in this embodiment includes: bending blades 7 uniformly distributed along the circumference and small hole 6 structures uniformly distributed in the center, wherein a blade cutting part 8 and a transition part 9 for connecting the blades with the plate body are arranged on the bending blades 7. The bending angle of the bending blade 7 is designed to be 25-30 degrees. The vortex plate 3 is bent to the blade 7, so that the rotation and mixing of the exhaust gas flow can be effectively promoted, the convection and diffusion of ammonia components are promoted, the ammonia distribution uniformity on the downstream SCR end face is improved, and the DeNOx conversion efficiency is improved.
In view of enabling more uniform distribution of ammonia, as shown in fig. 5, the bent vane 7 is cut at an end position near the center of the scroll plate 3 to form a vane cutting portion 8, and the vane cutting portion 8 is a slit formed along an end of the bent vane 7 near the center of the scroll plate 3 to an end away from the center of the scroll plate 3. The part of the bending blade 7, which is close to the center of the vortex plate 3, is cut to form a blade cutting part 8, and the main effect is that if the blade cutting part 8 is not arranged at the position, the swirling effect is not strong, the airflow is guided into the position through the notch part, and the small hole 6 structure is matched with the notch part, so that the low flow velocity phenomenon of the area is avoided, and the uniformity of the flow velocity and the uniformity of the ammonia distribution are improved.
The end part of the bending blade 7, which is close to one side of the edge of the vortex plate 3, is provided with a transition part 9, and the transition part 9 is arranged towards the center direction of the vortex plate 3. The transition part 9 mainly aims at guiding the flow velocity direction of the air flow, enabling the air flow to swirl along the tangential direction, avoiding too much air flow from entering the outer edge position of the vortex plate 3, being unfavorable for the air flow uniformity of the end face of the catalyst 19 and improving the utilization rate of ammonia.
When the bending blade 7 is specifically arranged, as shown in fig. 4, a plurality of annular strip-shaped holes 10 are formed in the peripheral annular region 5, the bending blade 7 is arranged in the strip-shaped holes 10, and an included angle between the bending blade 7 and the vortex plate 3 is 25-30 degrees, so that air flow is convenient to pass through.
As shown in fig. 2, 6, 7 and 9, an air inlet dispersing plate 11 is arranged between the air inlet and the conical cyclone tube 2, the air inlet dispersing plate 11 is of an arc structure, a plurality of holes are formed in the air inlet dispersing plate 11, and steel wool 12 is arranged at the bottom of the conical cyclone tube 2. The air inlet dispersion plate 11 is of an arc structure, a plurality of hole structures are arranged on the plate, and the hole structures are arranged on the air inlet two sides of the cyclone tube. The holes play a role in dispersing air flow, so that uneven air inflow caused by a side air inlet pipe and deviation blowing of urea spray are improved, and uniform development of the urea spray is protected.
The conical swirl tube 2 can promote the interaction of air flow and urea liquid drop spray, and the liquid drops are promoted to disperse outwards under the action of centrifugal force, so that the aggregation of the liquid drops is avoided. The steel wool 12 is arranged at the bottom of the liquid drop evaporator, and the evaporation and decomposition of the liquid drop are promoted by the large heat exchange area.
As shown in fig. 8, a Z-shaped partition plate 13 is further arranged inside the cylinder 1, and the Z-shaped partition plate 13 is arranged between the conical swirl tube 2 and the swirl plate 3; the Z-shaped partition plate 13 comprises a horizontal portion 14 and a vertical portion 15, a first hole 16 is formed in the horizontal portion 14, the bottom of the conical swirl tube 2 is sleeved in the first hole 16, a second hole 17 is formed in the vertical portion 15, and the second hole 17 is used for accommodating the side wall of the conical swirl tube 2.
The function of the Z-shaped partition 13 is to limit the conical swirl tube 2 further, so that the conical swirl tube 2 is more stable, and to divide the space between the gas inlet and the gas outlet in the cylinder 1 into two areas, so that the gas flowing into the conical swirl tube 2 can only pass through the steel wool 12 and then reach the swirl plate 3.
As shown in fig. 2-3, the top of the cylinder 1 is also provided with a urea injector 18, and the urea injector 18 is used for injecting urea into the conical swirl tube 2; a catalyst 19 is also arranged at one side of the interior of the cylinder 1, which is close to the gas outlet.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The diesel engine aftertreatment mixing device is characterized by comprising a barrel, wherein a conical swirl tube and a vortex plate are arranged in the barrel, a gas inlet and a gas outlet are arranged at two ends of the barrel, the conical swirl tube is arranged at a position close to the gas inlet, and the vortex plate is arranged at one side of the conical swirl tube close to the gas outlet; the vortex plate comprises a central circle center area and an outer circumference circle area, wherein the central circle center area is provided with a plurality of small holes, the outer circumference circle area is provided with a plurality of bending blades, the end parts of the bending blades, which are close to the center of the vortex plate, are cut to form blade cutting parts, the end parts of the bending blades, which are close to one side of the edge of the vortex plate, are provided with transition parts, and the transition parts are arranged towards the center direction of the vortex plate.
2. The diesel aftertreatment mixing device of claim 1, wherein the central center region is disposed at a central location of the scroll plate and the peripheral annular region is at a peripheral location of the scroll plate.
3. The post-treatment mixing device for diesel engine according to claim 1, wherein a plurality of fan-shaped annular strip-shaped holes are arranged on the peripheral annular region, bending blades are arranged in the strip-shaped holes, and an included angle between the bending blades and the vortex plate is 25 degrees to 30 degrees.
4. The diesel aftertreatment mixing device of claim 1, wherein the vane cutting section is a slit cut along an end of the bent vane proximate to the center of the scroll plate to an end distal to the center of the scroll plate.
5. The post-treatment mixing device of claim 1, wherein the apertures are uniformly distributed along the surface of the central circular region and the angled vanes are distributed in a circumferential array along the surface of the peripheral annular region.
6. The diesel aftertreatment mixing device of claim 1, wherein an intake air diffuser plate is disposed between the gas inlet and the conical swirl tube, the intake air diffuser plate having an arcuate configuration, the intake air diffuser plate having a plurality of holes disposed therein.
7. The diesel aftertreatment mixing device of claim 1, wherein the conical swirl tube is provided with steel wool at the bottom.
8. The diesel aftertreatment mixing device of claim 1, wherein a Z-baffle is further disposed within the barrel, the Z-baffle disposed between the conical swirl tube and the swirl plate; the Z-shaped partition plate comprises a horizontal portion and a vertical portion, a first hole is formed in the horizontal portion, the bottom of the conical cyclone tube is sleeved in the first hole, a second hole is formed in the vertical portion, and the second hole is used for accommodating the side wall of the conical cyclone tube.
9. The diesel aftertreatment mixing device of claim 1, wherein the scroll plate is fixedly connected to the inner wall of the cylinder and the size of the scroll plate is adapted to the inner diameter of the cylinder.
10. The diesel aftertreatment mixing device of claim 1, wherein the top of the cylinder is further provided with a urea injector for injecting urea into the conical swirl tube; and a catalyst is further arranged at one side, close to the gas outlet, of the interior of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322671177.1U CN220979625U (en) | 2023-09-28 | 2023-09-28 | Post-treatment mixing device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322671177.1U CN220979625U (en) | 2023-09-28 | 2023-09-28 | Post-treatment mixing device for diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN220979625U true CN220979625U (en) | 2024-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322671177.1U Active CN220979625U (en) | 2023-09-28 | 2023-09-28 | Post-treatment mixing device for diesel engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN220979625U (en) |
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