CN217681941U - Aftertreatment system and engine capable of reducing particulate matter emission - Google Patents
Aftertreatment system and engine capable of reducing particulate matter emission Download PDFInfo
- Publication number
- CN217681941U CN217681941U CN202221534198.8U CN202221534198U CN217681941U CN 217681941 U CN217681941 U CN 217681941U CN 202221534198 U CN202221534198 U CN 202221534198U CN 217681941 U CN217681941 U CN 217681941U
- Authority
- CN
- China
- Prior art keywords
- particulate filter
- aftertreatment system
- scr catalyst
- housing
- catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The application discloses an aftertreatment system and an engine for reducing particulate matter emission, and the aftertreatment system comprises an oxidizing catalyst, a first particle filter, a mixer and an SCR catalyst which are sequentially connected according to a tail gas flowing sequence, the aftertreatment system further comprises a urea supply device communicated with the mixer, a nozzle of the urea supply device is arranged in the mixer, an air outlet of the SCR catalyst is further connected with a second particle filter, an air outlet of the SCR catalyst is connected with the second particle filter, the second particle filter is used for re-trapping small liquid drops or particles generated by decomposing liquid urea sprayed in the aftertreatment system, the situation that the liquid urea is discharged into the air and pollutes the air is prevented, and the environment is protected; and small liquid drops or particles generated by the decomposition of the liquid urea sprayed in the aftertreatment system are detected by a detection device, so that the emission of the tail gas of the engine cannot meet higher national standards, and the emission standard of the engine is improved, so that the emission of the tail gas of the engine meets the higher national standards.
Description
Technical Field
The application belongs to the technical field of engine tail gas aftertreatment, and particularly relates to an aftertreatment system and an engine for reducing particulate matter emission.
Background
With the gradual implementation of emission regulations, the mobile-source atmospheric pollutants are effectively controlled, but the mobile-source pollutant control is not at the end, and a space for further reduction is provided. At this stage, DOC + DPF + SCR post-treatment systems commonly adopted by various domestic host plants meet the regulatory requirements, namely, a diesel oxidation catalyst, a diesel particulate filter and a selective catalytic reduction device.
Utilization of ammonia (NH) produced by hydrolysis of urea in an aftertreatment system 3 ) The Nitrogen Oxide (NO) in the exhaust gas is treated by a catalyst x ) Conversion to nitrogen (N) 2 ). But the injected liquid urea can be decomposed to generate fine liquid drops or particles, the fine liquid drops or particles can be directly discharged through the SCR, the injected liquid urea can be decomposed to generate fine liquid drops or particles, the fine liquid drops or particles are detected by the PN testing equipment, the risk that the particulate matters exceed the standard is increased, the particulate matters are discharged out of the limit, and the air pollution can be caused when the fine liquid drops or particles are discharged into the air.
SUMMERY OF THE UTILITY MODEL
The application provides a reduce aftertreatment system and engine that particulate matter discharged to the particulate matter that urea pyrolysis produced is by direct exhaust's technical problem among the current tail gas aftertreatment system of solution.
The technical scheme adopted by the application is as follows:
the utility model provides a reduce aftertreatment system that particulate matter discharged, includes the oxidizability catalyst converter, first particulate filter, blender and the SCR catalyst converter that connect gradually according to tail gas flow order, aftertreatment system still include with the urea feeding device of blender intercommunication, the nozzle of urea feeding device is located in the blender, the gas outlet of SCR catalyst converter still is connected with the second particulate filter.
The aftertreatment system for reducing particulate emissions in this application also has the following additional features:
the SCR catalyst includes a first housing and a catalyst body located within the first housing, and the second particulate filter includes a second housing and a second honeycomb carrier located within the second housing, the first housing being integrally formed with the second housing.
The SCR catalyst is detachably connected with the second particle filter.
One of the SCR catalyst and the second particle filter is provided with a buckling part, the other one of the SCR catalyst and the second particle filter is provided with a locking part, and the SCR catalyst and the second particle filter are detachably connected through the matching of the buckling part and the locking part.
The SCR catalyst converter with one of the two of second particulate filter is equipped with the pothook, and the other of them is equipped with the draw-in groove, the SCR catalyst converter with the second particulate filter passes through the pothook with the joint cooperation realization of draw-in groove can dismantle the connection.
And a sealing ring is arranged between the SCR catalyst and the second particle filter.
The first particulate filter includes a third housing and a first honeycomb carrier coated with a catalyst coating disposed within the third housing, and the second particulate filter includes a second housing and a second honeycomb carrier disposed within the third housing.
The second particulate filter has an outer diameter no greater than an outer diameter of the first particulate filter.
The second particulate filter has a perforation rate greater than a perforation rate of the first particulate filter.
An engine comprising the aftertreatment system for reducing particulate emissions.
Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:
1. according to the SCR catalytic converter, the second particle filter is connected to the air outlet of the SCR catalytic converter, small liquid drops or particles generated by decomposition of liquid urea sprayed in an after-treatment system can be collected again by the second particle filter, the situation that the small liquid drops or the particles are directly discharged into the air and further pollute the air is prevented, and the environment is protected; and the small liquid drops or particles generated by the decomposition of the liquid urea injected into the aftertreatment system are detected by a detection device, so that the emission of the engine exhaust cannot meet the higher national standard, and the small liquid drops or particles generated by the decomposition of the liquid urea injected into the aftertreatment system are recaptured through the second particle filter, so that the emission standard of the engine is improved, and the emission of the engine exhaust meets the higher national standard.
2. The SCR catalyst comprises a first shell and a catalyst main body positioned in the first shell, the second particle filter comprises a second shell and a second honeycomb carrier positioned in the second shell, and the first shell and the second shell are integrally formed, so that gas is prevented from flowing out of a gap between the first shell and the second shell, the gas cannot be effectively treated, the gas tightness of the aftertreatment system is improved, and the treatment effect of the aftertreatment system on tail gas is improved; in addition, a connecting device is not required to be additionally arranged, so that the structure of the post-processing system is simplified, the use of parts is reduced, the assembly efficiency is improved, the integral weight of the vehicle is reduced, and the energy consumption is reduced; through with first shell with the second shell sets up to integrated into one piece, prevents when the vehicle appears jolting, first shell with relative motion appears between the second shell, and then causes to connect unstably even leads to logical first shell with the condition of second shell separation makes aftertreatment system's connection is more firm.
3. This application is through inciting somebody to action the SCR catalyst converter with the second particulate filter sets up to dismantling the connection, works as when aftertreatment system breaks down, be convenient for with the second particulate filter is dismantled and is examined, works as simultaneously and changes also conveniently when the second particulate filter dismantles and changes the second particulate filter has reduced aftertreatment system's cost of maintenance.
4. According to the SCR particle filter, one of the SCR catalyst and the second particle filter is provided with a buckling part, the other of the SCR catalyst and the second particle filter is provided with a locking part, the SCR catalyst and the second particle filter are detachably connected through the matching of the buckling part and the locking part, and the SCR catalyst and the second particle filter are connected through a lock catch, so that the second particle filter is convenient to install and detach; the SCR catalyst and the second particle filter can be connected more tightly through the lock catch connection, the phenomenon that the SCR catalyst is separated from the second particle filter due to violent vehicle bump is prevented, and the aftertreatment system is more reliable.
5. This application passes through the SCR catalyst converter with one of them of second particulate filter is equipped with the pothook, and another of them is equipped with the draw-in groove, through with the SCR catalyst converter with the second particulate filter passes through the pothook with the joint cooperation of draw-in groove is realized dismantling the connection, and the connected mode simple structure of pothook and draw-in groove is and convenient the installation and the dismantlement of second particulate filter make the SCR catalyst converter with second particulate filter's connection structure is simpler.
6. According to the application, the sealing ring is arranged between the SCR catalyst and the second particle filter, so that the sealing performance of the SCR catalyst and the second particle filter is improved, the treatment effect of the aftertreatment system on tail gas is further improved, and the environment is protected; the sealing ring can play a role in shock absorption, so that the situation that noise is generated due to severe collision between the SCR catalyst and the second particle filter caused by vehicle bumping is prevented, and the driving experience is improved; and the condition that the SCR catalyst and the second particulate filter are abraded due to relative friction between the SCR catalyst and the second particulate filter caused by vehicle bump is prevented, and the service life of the aftertreatment system is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of an aftertreatment system according to one embodiment of the present disclosure.
Wherein:
1-an oxidative catalyst;
2-a first particulate filter;
3-a mixer;
4-SCR catalyst;
5-urea supply means;
6-a second particulate filter;
7-sealing ring.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present application.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, the utility model provides a reduce aftertreatment system that particulate matter discharged, include oxidizing catalyst 1, first particulate filter 2, mixer 3 and the SCR catalyst 4 that connects gradually according to tail gas flow order, aftertreatment system still include with the urea feeding device 5 of mixer 3 intercommunication, the nozzle of urea feeding device 5 is located in the mixer 3, the gas outlet of SCR catalyst 4 still is connected with second particulate filter 6.
The second particle filter 6 is connected with the air outlet of the SCR catalyst 4, and the second particle filter 6 can recapture small liquid drops or particles generated by decomposing liquid urea injected in an after-treatment system, so that the small liquid drops or the particles are prevented from being directly discharged into the air to further pollute the air, and the environment is protected; and the small liquid drops or particles generated by the decomposition of the liquid urea injected into the after-treatment system are detected by a detection device, which can affect that the emission of the engine exhaust cannot meet higher national standards, and the small liquid drops or particles generated by the decomposition of the liquid urea injected into the after-treatment system are recaptured by the second particle filter 6, so that the emission standard of the engine is improved, and the emission of the engine exhaust meets the higher national standards.
It should be noted that the connection mode of the SCR catalyst 4 and the second particulate filter 6 is not particularly limited, and may be one of the following embodiments:
the first implementation mode comprises the following steps: the SCR catalyst 4 comprises a first housing and a catalyst main body located in the first housing, and the second particulate filter 6 comprises a second housing and a second honeycomb carrier located in the second housing, the first housing and the second housing being integrally formed.
The first shell and the second shell are integrally formed, so that gas is prevented from flowing out through a gap between the first shell and the second shell, the gas cannot be effectively treated, the gas tightness of the aftertreatment system is improved, and the treatment effect of the aftertreatment system on tail gas is further improved; in addition, a connecting device is not required to be additionally arranged, so that the structure of the post-processing system is simplified, the use of parts is reduced, the assembly efficiency is improved, the integral weight of the vehicle is reduced, and the energy consumption is reduced; through with first shell with the second shell sets up to integrated into one piece, prevents when the vehicle bumps, relative motion appears between first shell with the second shell, and then causes to connect unstably and even leads to the fact lead to first shell with the condition of second shell separation, makes aftertreatment system's connection is more firm.
The second embodiment: the SCR catalyst 4 is detachably connected to the second particle filter 6.
This application is through inciting somebody to action SCR catalyst 4 with second particulate filter 6 sets up to dismantle the connection, works as when aftertreatment system breaks down, is convenient for with second particulate filter 6 is dismantled and is examined, and when needs are changed also conveniently tear open when second particulate filter 6 and trade second particulate filter 6 has reduced aftertreatment system's cost of maintenance.
It should be noted that the connection manner of the detachable connection of the SCR catalyst 4 and the second particulate filter 6 is not specifically limited, and may be one of the following embodiments:
the first embodiment is as follows: one of the SCR catalyst 4 and the second particle filter 6 is provided with a buckling part, the other one of the SCR catalyst 4 and the second particle filter 6 is provided with a locking part, and the SCR catalyst 4 and the second particle filter 6 are detachably connected through the matching of the buckling part and the locking part.
The SCR catalyst 4 is connected with the second particle filter 6 through a lock catch, so that the second particle flow passing device 6 is convenient to mount and dismount; the connection of the SCR catalyst 4 and the second particulate filter 6 can be made tighter by the snap-lock connection, preventing the SCR catalyst 4 from being separated from the second particulate filter 6 due to the violent vehicle pitching, and making the aftertreatment system more reliable.
Example two: SCR catalyst converter 4 with second particulate filter 6 one of them is equipped with the pothook, and another one of them is equipped with the draw-in groove, SCR catalyst converter 4 with second particulate filter 6 passes through the pothook with the joint cooperation of draw-in groove realizes dismantling the connection.
Through SCR catalyst converter 4 with one of them is equipped with the pothook of second particulate filter 6, and another of them is equipped with the draw-in groove, through with SCR catalyst converter 4 with second particulate filter 6 passes through the pothook with the joint cooperation of draw-in groove is realized dismantling the connection, and the connected mode simple structure of pothook and draw-in groove is convenient the installation and the dismantlement of second particulate filter 6 make SCR catalyst converter 4 with second particulate filter 6's connection structure is simpler.
As a preference in this embodiment, as shown in fig. 1, a sealing ring 7 is disposed between the SCR catalyst 4 and the second particulate filter 6, so as to improve the sealing performance between the SCR catalyst 4 and the second particulate filter 6, further improve the treatment effect of the aftertreatment system on the exhaust gas, and protect the environment; the sealing ring 7 can play a role in damping, so that the situation that noise is generated due to violent collision between the SCR catalyst 4 and the second particle filter 6 caused by vehicle bumping is prevented, and the driving experience is improved; and the situation that relative friction occurs between the SCR catalyst 4 and the second particulate filter 6 due to vehicle bump, so that the SCR catalyst 4 and the second particulate filter 6 are abraded is prevented, and the service life of the aftertreatment system is prolonged.
As a preferred embodiment of the present application, the first particulate filter 2 includes a third housing and a first honeycomb carrier located in the third housing, a catalyst coating is coated on the first honeycomb carrier, the second particulate filter 6 includes a second housing and a second honeycomb carrier located in the third housing, the second honeycomb carrier plays a role of secondary filtration without having a catalytic reaction, and therefore the second honeycomb carrier does not need to be coated with a catalyst coating, thereby reducing the production cost and saving resources.
It should be noted that the material of the second honeycomb carrier is not particularly limited, and may be cordierite, silicon carbide, or the like.
As a preferred embodiment of the present application, as shown in fig. 1, the outer diameter of the second particulate filter 6 is not greater than the outer diameter of the first particulate filter 2, and the outer diameter of the second particulate filter 6 is set not greater than the outer diameter of the first particulate filter 2, so that the volume of the second particulate filter 6 is smaller, and the space occupied by the second particulate filter 6 is smaller, so that the aftertreatment system can not occupy larger space and simultaneously improve the treatment effect of the aftertreatment system on the exhaust gas.
As a preferred embodiment of the present application, the perforation rate of the second particulate filter 6 is greater than the perforation rate of the first particulate filter 2, and the perforation rate of the second particulate filter 6 is greater than the perforation rate of the first particulate filter 2, that is, the number of the second particulate filter 6 is greater than the number of the first particulate filter, so that the trapping effect of the second particulate filter 6 on the particulate matters is more obvious, the phenomenon that the particulate matters cannot be effectively trapped due to the excessively small perforation rate of the second particulate filter 6 is prevented, the trapping rate of the particulate matters of the second particulate filter 6 is increased, and the treatment effect of the aftertreatment system on the exhaust gas is further improved.
Of course, the application is not restricted to the location of the ASC coating, which may be applied to the SCR catalyst 4 and/or the second particulate filter 6.
The present application further includes, as a preferred embodiment thereof, an engine including an aftertreatment system for reducing particulate emissions.
By providing the aftertreatment system for reducing particulate matter emission on the engine, when the aftertreatment system for reducing particulate matter emission is mounted on the engine, the emission standard of the engine can be improved, so that the exhaust emission of the engine provided with the aftertreatment system for reducing particulate matter emission can meet higher national standards.
Where not mentioned in this application, can be accomplished using or referencing existing technology.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. The post-treatment system for reducing particulate emission is characterized by comprising an oxidizing catalyst, a first particulate filter, a mixer and an SCR (selective catalytic reduction) catalyst which are sequentially connected according to a tail gas flowing sequence, and further comprising a urea supply device communicated with the mixer, wherein a nozzle of the urea supply device is arranged in the mixer, and an air outlet of the SCR catalyst is further connected with a second particulate filter.
2. The aftertreatment system of claim 1, wherein the SCR catalyst comprises a first housing and a catalyst body within the first housing, and the second particulate filter comprises a second housing and a second honeycomb substrate within the second housing, the first housing being integrally formed with the second housing.
3. The aftertreatment system of claim 1, wherein the SCR catalyst is removably coupled to the second particulate filter.
4. The aftertreatment system of claim 3, wherein one of the SCR catalyst and the second particulate filter is provided with a catch, and the other of the SCR catalyst and the second particulate filter is provided with a locking element, and the SCR catalyst and the second particulate filter are detachably connected by the catch and the locking element.
5. The aftertreatment system of claim 3, wherein one of the SCR catalyst and the second particulate filter is provided with a hook, and the other of the SCR catalyst and the second particulate filter is provided with a slot, and the SCR catalyst and the second particulate filter are detachably connected by the clamping fit of the hook and the slot.
6. The aftertreatment system of claim 3, wherein a gasket is disposed between the SCR catalyst and the second particulate filter.
7. The aftertreatment system of claim 1, wherein the first particulate filter includes a third housing and a first honeycomb substrate within the third housing, the first honeycomb substrate having a catalyst coating applied thereon, and wherein the second particulate filter includes a second housing and a second honeycomb substrate within the third housing.
8. The aftertreatment system of claim 1, wherein an outer diameter of the second particulate filter is no greater than an outer diameter of the first particulate filter.
9. The aftertreatment system of claim 1, wherein the second particulate filter has a perforation rate greater than a perforation rate of the first particulate filter.
10. An engine comprising an aftertreatment system for reducing particulate emissions according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221534198.8U CN217681941U (en) | 2022-06-17 | 2022-06-17 | Aftertreatment system and engine capable of reducing particulate matter emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221534198.8U CN217681941U (en) | 2022-06-17 | 2022-06-17 | Aftertreatment system and engine capable of reducing particulate matter emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217681941U true CN217681941U (en) | 2022-10-28 |
Family
ID=83711630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221534198.8U Active CN217681941U (en) | 2022-06-17 | 2022-06-17 | Aftertreatment system and engine capable of reducing particulate matter emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217681941U (en) |
-
2022
- 2022-06-17 CN CN202221534198.8U patent/CN217681941U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7380395B2 (en) | Exhaust gas system | |
| EP1060004B2 (en) | Improvements in emissions control | |
| KR101631149B1 (en) | Diesel engine exhaust gas purification device having ammonia decomposition module | |
| CN106437982A (en) | Shaft-inlet and shaft-outlet barrel type aftertreatment assembly | |
| KR20140062899A (en) | Exhaust gas purification system of vehicle | |
| CN109356693B (en) | Compact mixer assembly | |
| CN217681941U (en) | Aftertreatment system and engine capable of reducing particulate matter emission | |
| CN207974875U (en) | A kind of exhaust gas from diesel vehicle catalytic purification converter | |
| CN208900168U (en) | A kind of DOC-DPF-SCR after-treatment device | |
| KR20110101277A (en) | An emission apparatus for diesel engine exhaust gas | |
| CN206769988U (en) | A kind of exhaust purifier of diesel engine | |
| CN213790971U (en) | Offset SCR mixer | |
| CN218177306U (en) | Sectional type vehicle tail gas aftertreatment assembly suitable for diesel light truck | |
| CN210317449U (en) | Tail gas aftertreatment device | |
| CN212898663U (en) | Hybrid structure of exhaust aftertreatment system | |
| CN212079440U (en) | Aftertreatment assembly and vehicle | |
| CN211777661U (en) | Catalytic purifier with spoiler for gasoline engine | |
| CN115217602A (en) | Sectional type vehicle tail gas aftertreatment assembly suitable for diesel light truck | |
| CN205895370U (en) | Three way catalyst converter of automobile -used integrated particulate matter entrapment | |
| KR102542331B1 (en) | Vertical exhaust gas after treatment apparatus for agricultural machine | |
| CN216381563U (en) | Aftertreatment system, engine and vehicle | |
| CN216922273U (en) | SCR aftertreatment mixer and engine using same | |
| CN109882273A (en) | Light-duty diesel vehicle compact post-processes cartridge type encapsulating structure | |
| CN214196449U (en) | Ultralow nitrogen oxide double-SCR (selective catalytic reduction) system of vehicle-mounted diesel engine | |
| CN214577292U (en) | Diesel engine tail gas filtering component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |