Mixer, post-treatment system, and vehicle

Abstract

The present invention discloses a mixer, an after-treatment system and a vehicle. The mixer includes: a first housing, a second housing and a plurality of partition members. The second housing is disposed within the first housing, and the first housing and the second housing are spaced apart. Both ends of the second housing and the first housing in the direction of the central axis of the second housing are respectively open; one ends of the plurality of partition members are connected to each other in a direction perpendicular to the central axis of the second housing, and the other ends of the plurality of partition members are respectively connected to the second housing and the first housing in a direction perpendicular to the central axis of the second housing. Thereby, the coating area of the catalyst coating can be effectively increased, so as to increase the contact area between urea and the catalyst coating, promote the decomposition and utilization of urea, improve the conversion rate of urea, reduce the emissions of engine exhaust gas, and achieve the purpose of reducing air pollution. Since the structure of the mixer is relatively simple, the processing difficulty of the mixer can be reduced, and the reliability and production efficiency of the mixer can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a mixer, an after-treatment system and a vehicle. Background Art

[0002] In the prior art, the coating area of the catalyst in the mixer is small, resulting in a small contact area between the urea and the catalyst, and a low conversion rate of the urea. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a mixer that can improve the conversion rate of urea.

[0004] A second object of the present invention is to provide an after-treatment system including the mixer in the above embodiment.

[0005] A third object of the present invention is to provide a vehicle including the mixer or the after-treatment system in the above embodiment.

[0006] The mixer according to the embodiment of the first aspect of the present invention includes: a first housing, a second housing and a plurality of partition members. The second housing is disposed inside the first housing, and the first housing and the second housing are spaced apart. Both ends of the second housing and the first housing in the direction of the central axis of the second housing are open; the plurality of partition members are circumferentially spaced along the second housing, one ends of the plurality of partition members are connected to each other in a direction perpendicular to the central axis of the second housing, and the other ends of the plurality of partition members are respectively connected to the second housing and the first housing in a direction perpendicular to the central axis of the second housing.

[0007] According to the mixer of the embodiment of the present invention, through the through-type design of the mixer, the internal structure of the mixer is optimized. By circumferentially spacing a plurality of partition members in the mixer along the second housing, the coating area of the catalyst coating can be effectively increased, thereby increasing the contact area between the urea and the catalyst coating, promoting the decomposition and utilization of the urea, improving the conversion rate of the urea, reducing the emission of engine exhaust gas, and achieving the purpose of reducing air pollution. At the same time, since the structure of the mixer is relatively simple, the processing difficulty of the mixer can be reduced, and the reliability and production efficiency of the mixer can be improved.

[0008] In some embodiments, the cross-sectional shapes of the first housing and the second housing are circular.

[0009] In some embodiments, one ends of the plurality of partition members are connected to each other at the position of the central axis of the second housing.

[0010] In some embodiments, the number of the partition members is N, and N satisfies: 2 ≤ N ≤ 16.

[0011] In some embodiments, the first housing is a metal member; and / or, the second housing is a metal member; and / or, the partition member is a metal member.

[0012] In some embodiments, the partition member is connected to the first housing and the second housing by welding; and / or, the plurality of partition members are connected to each other by welding.

[0013] In some embodiments, a part of the partition member and the first housing and the second housing define a plurality of first flow channels, a part of the partition member and the second housing define a plurality of second flow channels, the plurality of first flow channels are arranged at intervals along the circumferential direction of the second housing, the plurality of second flow channels are arranged at intervals along the circumferential direction of the second housing, and the cross-sectional area of the first flow channel is larger than the cross-sectional area of the second flow channel.

[0014] In some embodiments, the mixer further includes: a catalyst coating, and the catalyst coating is disposed on the surfaces of the region surrounded by the first housing, the second housing, and the partition member.

[0015] In some embodiments, the catalyst coating includes a nanoporous oxide and a molecular sieve, and the nanoporous oxide and / or the molecular sieve are formed with a plurality of pore structures.

[0016] In some embodiments, the nanoporous oxide includes titanium dioxide and zirconium dioxide.

[0017] The post-treatment system according to the embodiment of the second aspect of the present invention includes the mixer according to any one of the above embodiments.

[0018] In some embodiments, the post-treatment system further includes: a catalytic converter and a nozzle device, and the mixer is disposed between the nozzle device and the catalytic converter.

[0019] The vehicle according to the embodiment of the third aspect of the present invention includes the mixer or the post-treatment system according to any one of the above embodiments.

[0020] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0022] Figure 1It is a schematic view of one perspective of a mixer according to an embodiment of the present invention, which is provided with four partition members;

[0023] Figure 2 It is a schematic view of another perspective of a mixer according to an embodiment of the present invention, which is provided with four partition members;

[0024] Figure 3 It is a schematic view of one perspective of a mixer according to an embodiment of the present invention, which is provided with eight partition members;

[0025] Figure 4 It is a schematic view of another perspective of a mixer according to an embodiment of the present invention, which is provided with eight partition members.

[0026] Reference numerals:

[0027] 100, mixer;

[0028] 10, first housing; 11, second housing; 12, partition member; 13, first flow channel; 14, second flow channel. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the drawings are exemplary. Below, reference is made to Figures 1 - 4 Describe a mixer 100 according to an embodiment of the present invention. The mixer 100 includes: a first housing 10, a second housing 11, and a plurality of partition members 12.

[0030] Specifically, as Figures 1 - 4 shown, the second housing 11 is disposed inside the first housing 10. The first housing 10 and the second housing 11 are spaced apart. Both ends of the second housing 11 and the first housing 10 in the direction of the central axis of the second housing 11 are respectively open; a plurality of partition members 12 are circumferentially spaced apart along the second housing 11. One ends of the plurality of partition members 12 are connected to each other in a direction perpendicular to the central axis of the second housing 11, and the other ends of the plurality of partition members 12 are respectively connected to the second housing 11 and the first housing 10 in a direction perpendicular to the central axis of the second housing 11.

[0031] The first housing 10 and the second housing 11 are internally hollow tubular structures. The first housing 10 extends along the central axis direction of the second housing 11. The second housing 11 is disposed at intervals inside the first housing 10. The central axes of the first housing 10 and the second housing 11 coincide, that is, the first housing 10 is sleeved outside the second housing 11. Both ends of the first housing 10 and the second housing 11 along the central axis direction of the second housing 11 are communicated with the engine exhaust pipeline, so that engine exhaust gas and urea aqueous solution enter the inside of the mixer 100. A plurality of partition members 12 extend along the central axis direction of the second housing 11. A part of the plurality of partition members 12 is disposed inside the second housing 11, and a part of the plurality of partition members 12 is disposed between the first housing 10 and the second housing 11. One end of the plurality of partition members 12 away from the first housing 10 is connected to the central axis of the second housing 11. The other ends of the plurality of partition members 12 extend radially outward from the inside of the second housing 11 in a radial direction away from the central axis of the second housing 11 and toward the first housing 10, and are arranged at intervals along the circumferential direction of the second housing 11 on the inner surface of the first housing 10, that is, on the side surface of the first housing 10 facing the second housing 11. In this embodiment, the plurality of partition members 12 are centrosymmetric about the central axis of the second housing 11. The surface of the partition member 12, the side surface of the first housing 10 facing the second housing 11, and the two side surfaces of the second housing 11 along the radial direction are respectively adapted to be coated with a catalyst coating for promoting urea decomposition.

[0032] For the mixer 100 according to an embodiment of the present invention, through the straight-through design of the mixer 100, the internal structure of the mixer 100 is optimized. The plurality of partition members 12 are arranged at intervals along the circumferential direction of the second housing 11 inside the mixer 100, which can effectively increase the coating area of the catalyst coating, thereby increasing the contact area between urea and the catalyst coating, promoting the decomposition and utilization of urea, improving the conversion rate of urea, reducing the emission of engine exhaust gas, and achieving the purpose of reducing air pollution. At the same time, since the structure of the mixer 100 is relatively simple, the processing difficulty of the mixer 100 can be reduced, and the reliability and production efficiency of the mixer 100 can be improved.

[0033] According to some embodiments of the present invention, such as Figure 2 and Figure 4 shown, the cross-sectional shapes of the first housing 10 and the second housing 11 are circular.

[0034] That is, the cross-sectional shapes of the first housing 10 and the second housing 11 are concentric circles. Thus, by designing the cross-sectional shapes of the first housing 10 and the second housing 11 to be circular, the area on the mixer 100 that can be coated with the catalyst coating is increased, which facilitates the full contact between the catalyst coating inside the mixer 100 and urea, improves the conversion rate of urea, reduces the resistance pressure of the exhaust gas in the mixer 100, that is, reduces the exhaust back pressure, ensures the smooth passage of the engine exhaust gas through the mixer 100, avoids affecting the performance of the engine. At the same time, it is convenient for the processing of the mixer 100 and improves the structural strength of the mixer 100.

[0035] According to some embodiments of the present invention, as Figures 1 - 4 shown, the ends of the plurality of partition members 12 away from the first housing 10 are connected to each other at the position of the central axis of the second housing 11.

[0036] The ends of the plurality of partition members 12 away from the first housing 10 along the radial direction of the second housing 11 are commonly connected to the central axis of the second housing 11. Thus, the structural strength of the plurality of partition members 12 can be improved, the internal space structure of the mixer 100 can be optimized, the stability and reliability of the arrangement of the partition members 12 can be increased, the occupied space of the partition members 12 inside the mixer 100 can be reduced, and while the coating area of the catalyst coating on the partition members 12 is increased, the intake air volume of the engine exhaust gas entering the mixer 100 can be increased, thereby minimizing the emission of the engine exhaust gas.

[0037] According to some embodiments of the present invention, the number of the partition members 12 is N, and N satisfies: 2 ≤ N ≤ 16.

[0038] When the number of the partition members 12 is less than 2, the number of the partition members 12 is too small. Although the porosity in the mixer 100 is large and the exhaust back pressure is small, the coating area of the catalyst coating in the mixer 100 is reduced, the contact area between the catalyst coating and urea is reduced, and the conversion rate of urea is reduced; when the number of the partition members 12 is greater than 16, the number of the partition members 12 is too large. Although the contact area between the catalyst coating and urea is increased, the porosity in the mixer 100 is small and the exhaust back pressure is large, which easily affects the fuel economy of the vehicle and increases the cost. For example, N = 4 or N = 8.

[0039] Thus, by limiting the number range of the partition members 12, the coating area of the catalyst coating in the mixer 100 can be increased, the contact area between the catalyst coating and urea can be increased, the conversion rate of urea can be improved, the emission of the engine exhaust gas can be reduced. At the same time, the porosity in the mixer 100 can be reduced, the exhaust back pressure can be reduced, the smooth passage of the engine exhaust gas through the mixer 100 can be ensured, and the fuel economy of the vehicle can be improved.

[0040] Optionally, the number of the partition members 12 can be adjusted according to different exhaust gas flows of the engine.

[0041] According to some embodiments of the present invention, the first housing 10 is a metal part. The metal part has excellent thermal conductivity. Thus, under the condition of relatively low exhaust gas temperature, it can be ensured that the first housing 10 quickly warms up after the engine starts, preventing the urea aqueous solution from contacting the low-temperature first housing 10, avoiding the formation of incompletely decomposed crystals on the first housing 10, improving the conversion rate of urea, preventing the engine exhaust pipe from being blocked, avoiding an increase in exhaust back pressure, ensuring the smooth passage of the engine exhaust gas through the mixer 100, improving the fuel economy of the vehicle, and enhancing the performance of the engine.

[0042] Optionally, the second housing 11 is a metal part. Thus, it can be ensured that the second housing 11 quickly warms up after the engine starts, preventing the urea aqueous solution from contacting the low-temperature second housing 11, avoiding the formation of incompletely decomposed crystals on the second housing 11, improving the conversion rate of urea, preventing the engine exhaust pipe from being blocked, and avoiding an increase in exhaust back pressure.

[0043] Optionally, the partition 12 is a metal part. Thus, it can be ensured that the partition 12 quickly warms up after the engine starts, preventing the urea aqueous solution from contacting the low-temperature partition 12, avoiding the formation of incompletely decomposed crystals on the partition 12, improving the conversion rate of urea, preventing the engine exhaust pipe from being blocked, and avoiding an increase in exhaust back pressure.

[0044] Optionally, the first housing 10, the second housing 11, and the partition 12 are all metal parts. Thus, the urea conversion rate can be further improved, and the emissions of the engine exhaust gas can be further reduced.

[0045] Therefore, when the mixer 100 is made of a metal material, the good thermal conductivity of the metal can be utilized to provide the reaction temperature for the reaction between the urea aqueous solution and the catalyst coating, accelerating the reaction efficiency, avoiding a relatively low exhaust gas temperature, and preventing the urea aqueous solution from not being completely decomposed to generate complexes due to contacting the low-temperature side wall and poor atomization, etc., and preventing the complexes from accumulating to form crystals and thus blocking the exhaust pipe.

[0046] According to some embodiments of the present invention, the partition 12 is welded to the first housing 10 and the second housing 11. Thus, the partition 12 can be separately manufactured from the first housing 10 and the second housing 11, which can reduce the processing difficulty. At the same time, the connection strength between the partition 12 and the first housing 10 and the second housing 11 can be improved, thereby enhancing the reliability of the mixer 100 and extending the service life of the mixer 100.

[0047] Optionally, the plurality of spacers 12 are welded together. Thus, the plurality of spacers 12 can be separately manufactured, which can reduce the processing difficulty of the spacers 12. At the same time, the structural strength and connection strength of the plurality of spacers 12 are improved, the separation of the spacers 12 is avoided, the service life of the spacers 12 is extended, and the reliability and stability of the installation of the spacers 12 are improved.

[0048] Optionally, the spacers 12 are welded to the first housing 10 and the second housing 11, and at the same time, the plurality of spacers 12 are welded together. Thus, the connection strength between the spacers 12, the first housing 10 and the second housing 11 can be further improved, and the stability and reliability of the mixer 100 can be further improved.

[0049] According to some embodiments of the present invention, as Figure 2 and Figure 4 shown, a part of the spacer 12 and the first housing 10 and the second housing 11 define a plurality of first flow channels 13, and a part of the spacer 12 and the second housing 11 define a plurality of second flow channels 14. The plurality of first flow channels 13 are arranged at intervals in the circumferential direction of the second housing 11, the plurality of second flow channels 14 are arranged at intervals in the circumferential direction of the second housing 11, and the cross-sectional area of the first flow channel 13 is larger than the cross-sectional area of the second flow channel 14.

[0050] The adjacent surfaces of the adjacent two spacers 12, the inner surface of the first housing 10 and the outer surface of the second housing 11 between the adjacent two spacers 12 together define the first flow channel 13. There are a plurality of first flow channels 13, and the plurality of first flow channels 13 are arranged at intervals in the circumferential direction of the second housing 11, and the first flow channel 13 is arranged radially between the first housing 10 and the second housing 11 along the second housing 11; the adjacent surfaces of the adjacent two spacers 12 and the inner surface of the second housing 11 between the adjacent two spacers 12 together define the second flow channel 14. There are a plurality of second flow channels 14, and the plurality of second flow channels 14 are arranged at intervals in the circumferential direction of the second housing 11. In this application, the number of the first flow channels 13 and the second flow channels 14 is the same, and the first flow channel 13 and the second flow channel 14 between the adjacent two spacers 12 are arranged at intervals radially along the second housing 11.

[0051] Thus, by providing the spacer 12 and defining a plurality of first flow channels 13 and second flow channels 14, interference between different flow channels can be avoided, which is convenient for coating the catalyst coating in the first flow channel 13 and the second flow channel 14, so that the catalyst coating is evenly distributed in the mixer 100, which is convenient for the catalyst coating to fully contact with the urea, and the conversion rate of the urea is improved.

[0052] According to some embodiments of the present invention, the mixer 100 further includes: a catalyst coating, and the catalyst coating is provided on the surfaces of the regions surrounded by the first housing 10, the second housing 11 and the spacer 12.

[0053] In this embodiment, urea undergoes processes such as evaporation, pyrolysis, and hydrolysis to form a reducing agent (NH3, i.e., ammonia) and HNCO (isocyanic acid). NH3 reacts with the NO in the engine exhaust gas x to undergo an oxidation-reduction reaction, ultimately achieving the purpose of reducing NO x emissions. The catalyst coating can catalyze the decomposition of urea and improve the decomposition efficiency of urea.

[0054] The catalyst coating is suitable for promoting the decomposition and utilization of urea. The catalyst coating is respectively coated on the inner surface of the first housing 10, the inner surface and the outer surface of the second housing 11, and the two side surfaces along the circumferential direction of the second housing 11 of the plurality of partition members 12.

[0055] Thus, by providing the catalyst coating on the surfaces of the regions surrounded by the first housing 10, the second housing 11, and the partition members 12, it is possible to facilitate the full contact between urea and the catalyst coating, improve the efficiency of the catalyst coating in catalyzing the decomposition of urea to produce NH3, improve the conversion rate of urea, and reduce the emissions of engine exhaust gas.

[0056] Optionally, the loading amount on the catalyst coating is 50 - 150 g / L.

[0057] According to some embodiments of the present invention, the catalyst coating includes a nanoporous oxide and a molecular sieve. The nanoporous oxide is formed with a plurality of pore structures, or the molecular sieve is formed with a plurality of pore structures.

[0058] In this embodiment, both the nanoporous oxide and the molecular sieve are formed with a plurality of pore structures. Thus, it is beneficial to increase the specific surface area of the catalyst coating, enhance the contact area between urea and the catalyst coating, improve the decomposition efficiency of urea, improve the efficiency of producing NH3, and reduce the emissions of engine exhaust gas.

[0059] Preferably, the molecular sieve is H-SSZ-13, which can promote the hydrolysis of isocyanic acid. The hydrolysis of isocyanic acid can generate NH3, thereby enhancing the overall efficiency of producing NH3 and reducing the emissions of engine exhaust gas.

[0060] According to some embodiments of the present invention, the nanoporous oxide includes titanium dioxide and zirconium dioxide.

[0061] That is, the nanoporous oxide is a mixture of nanoporous titanium dioxide (TiO2) and zirconium dioxide (ZrO2). Titanium dioxide has a high catalytic activity for the pyrolysis of urea, and zirconium dioxide has a high catalytic ability for the hydrolysis of isocyanic acid. Thus, the decomposition efficiency of urea can be improved, the efficiency of producing NH3 can be improved, and the emissions of engine exhaust gas can be reduced.

[0062] According to the after-treatment system of the second aspect embodiment of the present invention, it includes the mixer 100 in any one of the above embodiments.

[0063] In this embodiment, by adopting the mixer 100 provided with a plurality of partition members 12, the internal structure of the mixer 100 is optimized, and the catalyst coating is applied to the surfaces of the regions surrounded by the first housing 10, the second housing 11 and the partition members 12, increasing the specific surface area of the catalyst coating, providing more catalyst active sites, improving the conversion rate of urea, reducing the emissions of engine exhaust gas. Through the straight-through design of the mixer 100, the exhaust resistance can be reduced, the back pressure can be decreased, enabling the engine exhaust gas to pass through smoothly without affecting the engine performance. At the same time, the risk of the exhaust pipe being blocked after urea crystallization is reduced.

[0064] According to some embodiments of the present invention, the aftertreatment system further includes: a catalytic converter and a nozzle device, and the mixer 100 is disposed between the nozzle device and the catalytic converter.

[0065] That is, the mixer 100 is disposed at the front end of the catalytic converter and the rear end of the nozzle device, wherein the catalytic converter is a selective catalytic reduction (SCR) catalytic converter, and the nozzle device is a urea nozzle device.

[0066] Thus, by disposing the mixer 100 between the nozzle device and the catalytic converter, the competition for the active sites of the copper-based molecular sieve catalyst between the hydrolysis of isocyanic acid and the NH3-SCR reaction in the catalytic converter is avoided, enabling the NH3 in the mixer 100 to fully react with the engine exhaust gas NO x reaction, reducing the emissions of engine exhaust gas, and improving the reliability of the aftertreatment system.

[0067] The vehicle according to the third aspect embodiment of the present invention includes the mixer 100 or the aftertreatment system in any one of the above embodiments. Thereby, the emissions of the engine exhaust gas of the vehicle can be reduced.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0069] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. In the description of the present invention, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0071] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mixer (100), characterized in that, Comprising: A first housing (10); A second housing (11), the first housing (10) and the second housing (11) being tubular structures, the second housing (11) being disposed within the first housing (10), the first housing (10) and the second housing (11) being spaced apart, the second housing (11) and the first housing (10) extending along the central axis direction of the second housing (11) and being open at both ends in the extending direction; A plurality of partition members (12), the plurality of partition members (12) being circumferentially spaced along the second housing (11), one ends of the plurality of partition members (12) being connected to each other in a direction perpendicular to the central axis of the second housing (11), the other ends of the plurality of partition members (12) being respectively connected to the second housing (11) and the first housing (10) in a direction perpendicular to the central axis of the second housing (11), the one ends of the plurality of partition members (12) being connected to each other at the central axis position of the second housing (11), the plurality of partition members (12) and the first housing (10) and the second housing (11) jointly defining a first flow channel (13) and a second flow channel (14), wherein, a part of the partition member (12) and the first housing (10) and the second housing (11) define a plurality of first flow channels (13), another part of the partition member (12) and the second housing (11) define a plurality of second flow channels (14), the first flow channels (13) and the second flow channels (14) being spaced apart; A catalyst coating, the catalyst coating being disposed on the surfaces of the region surrounded by the first housing (10), the second housing (11) and the partition members (12).

2. The mixer (100) according to claim 1, characterized in that, The cross-sectional shapes of the first housing (10) and the second housing (11) are circular.

3. The mixer (100) according to claim 1, characterized in that, The number of the partition members (12) is N, and N satisfies: 2 ≤ N ≤ 16.

4. The mixer (100) according to claim 1, characterized in that, The first housing (10) is a metal member; and / or, The second housing (11) is a metal member; and / or, The partition members (12) are metal members.

5. The mixer (100) according to claim 1, characterized in that, The partition members (12) are welded to the first housing (10) and the second housing (11); and / or, The plurality of partition members (12) are welded to each other.

6. The mixer (100) according to claim 1, characterized in that, The plurality of first flow channels (13) are circumferentially spaced along the second housing (11), the plurality of second flow channels (14) are circumferentially spaced along the second housing (11), The cross-sectional area of the first flow channel (13) is larger than the cross-sectional area of the second flow channel (14).

7. The mixer (100) according to claim 1, characterized in that, The catalyst coating includes nano-porous oxides and molecular sieves, and the nano-porous oxides and / or the molecular sieves are formed with a plurality of pore structures.

8. The mixer (100) according to claim 7, characterized in that, The nano-porous oxides include titanium dioxide and zirconium dioxide.

9. A post-processing system, characterized in that, Comprising a mixer (100) according to any one of claims 1-8.

10. The post-treatment system according to claim 9, characterized in that, Further comprising: A catalytic converter; A nozzle device, the mixer (100) being disposed between the nozzle device and the catalytic converter.

11. A vehicle, characterized in that, Comprising a mixer (100) according to any one of claims 1-8, or a post-treatment system according to any one of claims 9-10.

Images