Exhaust gas purification and noise reduction devices for diesel engines and rail vehicles

Abstract

This disclosure provides an exhaust gas purification and noise reduction device for a diesel engine, comprising: a housing having an air inlet and an exhaust outlet; a heating unit installed inside the housing near the air inlet and communicating with the air inlet, suitable for heating the exhaust gas flowing in from the air inlet; and a particulate decomposition unit installed inside the housing near the exhaust outlet and communicating with the exhaust outlet, configured to decompose carbon particulate matter in the exhaust gas flowing through the particulate decomposition unit; wherein the high-temperature exhaust gas formed by the heating unit enters the particulate decomposition unit, capable of heating and decomposing the carbon particulate matter remaining in the particulate decomposition unit. This disclosure also provides a rail vehicle including the exhaust gas purification and noise reduction device for a diesel engine described in the above embodiment.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to the field of engine exhaust gas treatment devices, and more specifically, to an exhaust gas purification and noise reduction device for diesel engines and rail vehicles. Background Technology

[0002] Diesel engines emit exhaust gases that pollute the environment during operation. With the increasing global climate change and air pollution, the requirements for the amount of particulate matter in diesel engine exhaust are becoming more and more stringent.

[0003] To address the aforementioned problems, existing technology provides an exhaust gas treatment device for diesel engines. However, during the treatment of carbon particulate matter in the exhaust gas, as the volume of exhaust gas increases, a large amount of carbon particulate matter remains in the treatment device, reducing its treatment capacity. In some cases, when the residual carbon particulate matter in the treatment device reaches a certain level, it becomes unable to absorb carbon particulate matter from the exhaust gas again, thus failing to achieve the desired exhaust gas purification effect. In such cases, it is necessary to replace the relevant components of the exhaust gas treatment device, increasing operating costs. Summary of the Invention

[0004] In view of this, embodiments of the present disclosure provide an exhaust gas purification and noise reduction device for diesel engines, which decomposes carbon particulate matter in diesel engine exhaust gas and decomposes carbon particulate matter remaining inside the exhaust gas purification and noise reduction device itself, thereby achieving self-cleaning of the exhaust gas purification and noise reduction device.

[0005] According to a first aspect of this disclosure, an exhaust gas purification and noise reduction device for a diesel engine is provided, comprising: a housing having an air inlet and an exhaust outlet; a heating unit installed inside the housing near the air inlet and communicating with the air inlet, adapted to heat exhaust gas flowing in from the air inlet; and a particulate decomposition unit installed inside the housing near the exhaust outlet and communicating with the exhaust outlet, configured to decompose carbon particulate matter in the exhaust gas flowing through the particulate decomposition unit; wherein the high-temperature exhaust gas formed by the heating unit enters the particulate decomposition unit, capable of heating and decomposing the carbon particulate matter remaining in the particulate decomposition unit.

[0006] According to an embodiment of this disclosure, the particulate decomposition section includes: a substrate extending along a first direction, one end of the substrate extending along the first direction being connected to the heating section to receive exhaust gas heated by the heating section, and one end of the substrate extending along a second direction perpendicular to the first direction being connected to the exhaust port, and a plurality of first micropores for supporting catalysts being formed on the substrate.

[0007] According to an embodiment of the present disclosure, the exhaust end of the substrate is configured to be closed at intervals along the first direction, forming a first air passage closed at the exhaust end and a second air passage open at the exhaust end, which are distributed at intervals along the first direction, such that the exhaust gas flowing through the first air passage can flow into the second air passage through the first micropores formed on the sidewall of the first air passage, thereby changing the flow direction of the exhaust gas and allowing the carbon particles in the exhaust gas to fully contact the catalyst loaded on the first micropores.

[0008] According to an embodiment of the present disclosure, the substrate includes: a shell extending along the first direction; and a plurality of substrates respectively mounted inside the shell, each substrate extending in a plane perpendicular to the first direction, a cavity being formed between two adjacent substrates, and the plurality of cavities having baffles spaced apart at the exhaust end, such that one of two adjacent cavities is closed at the exhaust end and the other cavity is open at the exhaust end.

[0009] According to an embodiment of the present disclosure, the outer shell is constructed as a hollow cylinder with a generally circular cross-section; the substrate is constructed as a generally circular thin plate, and a plurality of first micropores extending along the first direction are formed on the substrate; a plurality of connectors are provided on the inner sidewall of the outer shell to connect the substrate to the interior of the outer shell.

[0010] According to embodiments of this disclosure, the matrix is ​​made of a porous material loaded with a catalyst.

[0011] According to embodiments of this disclosure, the substrate is made of gold or platinum having a porous structure.

[0012] According to an embodiment of this disclosure, the exhaust gas purification and noise reduction device for a diesel engine further includes: a muffler installed inside the housing, with both ends connected to the heating section and the particulate decomposition section respectively, configured to absorb the sound energy of the exhaust gas flowing through the muffler to reduce exhaust gas noise.

[0013] According to an embodiment of this disclosure, the silencing part includes: a cylindrical body extending along the first direction and installed inside the housing; and a plurality of silencing components sequentially installed inside the cylindrical body in a circumferential direction, each of the silencing components extending along the first direction and configured to communicate with the interior of the cylindrical body, such that sound waves formed by the exhaust gas flow flow back and forth through the silencing component and the cylindrical body to absorb the energy of the sound waves.

[0014] According to an embodiment of this disclosure, the silencing component includes: a tube extending along the first direction, with both ends of the tube connected to the heating part and the particle decomposition part respectively via connecting ends; and a plurality of second micropores formed in a matrix on the sidewall of the tube.

[0015] According to embodiments of this disclosure, the heating section includes multiple sets of interconnected heating elements.

[0016] A second aspect of this disclosure provides a rail vehicle including the exhaust gas purification and noise reduction device for a diesel engine described in the above embodiments.

[0017] The exhaust gas purification and noise reduction device for diesel engines according to the above embodiments of this disclosure involves providing a heating section and a particulate decomposition section on the side of the housing near the air inlet and the side near the exhaust outlet, respectively. The exhaust gas flowing into the housing is heated, and the high-temperature exhaust gas formed after being heated by the heating section flows into the particulate decomposition section, where carbon particulate matter in the exhaust gas is decomposed into carbon oxides and nitrogen oxides. Furthermore, under the action of this high-temperature exhaust gas, the carbon particulate matter remaining in the particulate decomposition section is heated and decomposed, thereby achieving self-cleaning of the exhaust gas purification and noise reduction device. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of an exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure;

[0019] Figure 2 This is a plan view of the particulate decomposition section of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure;

[0020] Figure 3 This is an installation schematic diagram of the connection end between the particulate decomposition section and the muffler of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure.

[0021] Figure 4 This is a plan view of the substrate of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of the present disclosure;

[0022] Figure 5 yes Figure 4 A partially enlarged view of the first micro-hole formed on the substrate; and

[0023] Figure 6 This is a plan view of the silencer component of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure.

[0024] In the picture:

[0025] 1-Shell; 11-Air inlet; 12-Exhaust outlet;

[0026] 2-Heating section; 21-Heating element;

[0027] 3-Particle decomposition section;

[0028] 31-Matrix;

[0029] 311 - First micropore;

[0030] 312 - Exhaust end;

[0031] 313 - First airway;

[0032] 314 - Second airway;

[0033] 315-Substrate;

[0034] 316 - Cavity;

[0035] 317-Stop;

[0036] 318 - Connector;

[0037] 319 - Housing;

[0038] 4-Silence section;

[0039] 41-Cylinder body;

[0040] 42-Silencer; 421-Tube body; 422-Second micropore; 423-Connecting end. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0042] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of embodiments of this disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0044] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0045] According to one aspect of the inventive concept of this disclosure, an exhaust gas purification and noise reduction device for a diesel engine is provided, comprising: a housing having an air inlet and an exhaust outlet; a heating unit installed inside the housing near the air inlet and communicating with the air inlet, suitable for heating the exhaust gas flowing in from the air inlet; and a particulate decomposition unit installed inside the housing near the exhaust outlet and communicating with the exhaust outlet, configured to decompose carbon particulate matter in the exhaust gas flowing through the particulate decomposition unit; wherein, the high-temperature exhaust gas formed by the heating unit enters the particulate decomposition unit, which can heat and decompose the carbon particulate matter remaining in the particulate decomposition unit.

[0046] Figure 1 This is an overall schematic diagram of an exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure.

[0047] According to exemplary embodiments of this disclosure, please refer to Figure 1 This invention provides an exhaust gas purification and noise reduction device for diesel engines, comprising a housing 1, a heating unit 2, and a particulate matter decomposition unit 3. The housing 1 is provided with an air inlet 11 and an exhaust outlet 12. The heating unit 2 is installed inside the housing 1 near the air inlet 11 and communicates with the air inlet 11, and is used to heat the exhaust gas flowing in through the air inlet 11. The particulate matter decomposition unit 3 is installed inside the housing 1 near the exhaust outlet 12 and communicates with the exhaust outlet 12, and is configured to decompose carbon particulate matter in the exhaust gas flowing through the particulate matter decomposition unit 3. The high-temperature exhaust gas formed by the heating unit 2 enters the particulate matter decomposition unit 3, which can heat and decompose the carbon particulate matter remaining in the particulate matter decomposition unit 3.

[0048] In this embodiment, a heating section 2 and a particulate decomposition section 3 are respectively provided on the side of the housing 1 near the air inlet 11 and the side near the exhaust outlet 12 to heat the exhaust gas flowing into the housing 1. After being heated by the heating section 2, the high-temperature exhaust gas flows into the particulate decomposition section 3, where carbon particles in the exhaust gas are decomposed into carbon oxides and nitrogen oxides. Furthermore, under the action of this high-temperature exhaust gas, the carbon particles remaining in the particulate decomposition section 3 are heated and decomposed to achieve self-cleaning of the exhaust gas purification and noise reduction device.

[0049] Figure 2 This is a plan view of the particulate decomposition section of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure; Figure 3 This is a schematic diagram of the connection between the particulate decomposition section and the muffler of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure.

[0050] In some exemplary embodiments, reference is made to Figures 1-3The particulate decomposition section 3 includes a substrate 31. The substrate 31 extends along a first direction. One end of the substrate 31 extending along the first direction is connected to the heating section 2 to receive the exhaust gas heated by the heating section 2, and the other end of the substrate 31 extending along a second direction perpendicular to the first direction is connected to the exhaust port 12. A plurality of first micropores 311 for supporting catalyst are formed on the substrate 31, so that when the exhaust gas flows through the substrate 31, it flows through the first micropores 311 and contacts the catalyst loaded on the first micropores 311 to decompose the unburned carbon particles in the exhaust gas.

[0051] With the above configuration, the exhaust gas is heated by the heating unit 2 to form a high-temperature exhaust gas flow, which flows into the matrix 31 of the particulate decomposition unit 3 in the first direction and flows through the first micropores 311. Unburned carbon particles mixed in the exhaust gas come into contact with the catalyst loaded on the first micropores 311 and are decomposed into carbon oxides or nitrogen oxides. The exhaust gas treated by the particulate decomposition unit 3 flows in the second direction and is discharged through the exhaust port 12 from the exhaust gas purification and noise reduction device, thereby achieving the effect of purifying the exhaust gas.

[0052] Furthermore, the unburned carbon particles remaining on the particulate decomposition section 3 are heated and decomposed by the high-temperature exhaust gas formed by the heating section 2. This also overcomes the problem that the continuous accumulation of residual carbon particles in the particulate decomposition section 3 causes excessive back pressure in the exhaust gas flow, which affects the smooth flow of the exhaust gas.

[0053] It should be noted that, in this embodiment, the first direction refers to Figure 1 The direction pointed to by the middle arrow A, the second direction refers to Figure 1 The direction indicated by the middle arrow B.

[0054] In some exemplary embodiments, reference is made to Figures 1-3 The exhaust end 312 of the substrate 31 is configured to be closed at intervals along a first direction, forming a first air passage 313 closed at the exhaust end 312 and a second air passage 314 open at intervals along the first direction. This allows the exhaust gas flowing through the first air passage 313 to flow into the second air passage 314 through the first micropores 311 formed on the sidewall of the first air passage 313, thereby changing the flow direction of the exhaust gas and allowing the carbon particles in the exhaust gas to fully contact the catalyst supported on the first micropores 311. Both the first air passage 313 and the second air passage 314 extend along a second direction.

[0055] With the above configuration, after the exhaust gas flows into the substrate 31, it is sealed by the exhaust end 312 of the first air passage 313. The exhaust gas flows inside the first air passage 313 and then turns back after reaching the sealed exhaust end 312, forming a reverse airflow. It then flows into the second air passage 314 through the first micropore 311 formed on the side wall of the first air passage 313, increasing the number of times the exhaust gas flows through the first micropore 311. This allows the carbon particles in the exhaust gas to fully contact the catalyst loaded on the first micropore 311, thereby improving the decomposition rate of the carbon particles in the exhaust gas.

[0056] In some exemplary embodiments, reference is made to Figures 1-3 The substrate 31 includes a housing 319 and a plurality of substrates 315. The housing 319 extends along a first direction. The plurality of substrates 315 are respectively mounted inside the housing 319, each substrate 315 extending in a plane perpendicular to the first direction, and a cavity 316 is formed between two adjacent substrates 315. The plurality of cavities 316 are provided with baffles 317 at intervals at the exhaust end 312, such that one cavity 316 of two adjacent cavities 316 is closed at the exhaust end 312, and the other cavity 316 is open at the exhaust end 312.

[0057] With the above arrangement, a cavity 316 extending in the second direction is formed between two adjacent substrates 315. A plurality of cavities 316 are provided with baffles 317 at intervals at the exhaust end 312, such that one cavity 316 of two adjacent cavities 316 is closed at the exhaust end 312, forming a first air passage 313 closed at the exhaust end 312, and the other cavity 316 is open at the exhaust end 312, forming a second air passage 314 open at the exhaust end 312.

[0058] Figure 4 This is a plan view of the substrate of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of the present disclosure; Figure 5 yes Figure 4 A magnified view of a portion of the first micropore formed on the substrate.

[0059] In some exemplary embodiments, reference is made to Figures 1-5 The outer casing 319 is constructed as a hollow cylinder with a generally circular cross-section. The substrate 315 is constructed as a generally circular thin plate, and a plurality of first microholes 311 extending along a first direction are formed on the substrate 315. A plurality of connectors 318 are provided on the inner sidewall of the outer casing 319 to connect the substrate 315 to the interior of the outer casing 319. For example, a plurality of sets of clamping members are sequentially provided on the inner sidewall of the outer casing 319 along the first direction, each set of clamping members being distributed in a plane perpendicular to the first direction to clamp the substrate 315 inside the outer casing 319. Alternatively, each substrate 315 is welded to the inner sidewall of the outer casing 319 by welding.

[0060] In this embodiment, the outer shell 319 is constructed as a hollow cylinder with a generally circular cross-section; that is, the base 31 is generally constructed as a cylinder. The outer shell 319 is a closed structure, open only at the connection between the outer shell 319 and the exhaust port 12, and at the connection between the outer shell 319 and the muffler 4. The first direction refers to the axial direction of the base 31, and the second direction refers to the radial direction of the base 31.

[0061] In some exemplary embodiments, the substrate 31 is made of a porous material loaded with a catalyst.

[0062] In some exemplary embodiments, the substrate 31 is made of gold or platinum with a porous structure.

[0063] It should be noted that the exhaust gas purification and noise reduction device in this embodiment can decompose 40%-60% of the carbon particulate matter in the exhaust gas. Under the action of a catalyst and at a suitable exhaust temperature (e.g., 250°C), the carbon particulate matter in the exhaust gas undergoes an oxidation reaction with nitrogen dioxide (NO2) in the exhaust gas to generate carbon dioxide (CO2) and nitric oxide (NO) which are then discharged.

[0064] In some exemplary embodiments, reference is made to Figure 1 The exhaust gas purification and noise reduction device for diesel engines also includes a silencer 4. The silencer 4 is installed inside the housing 1 and its two ends are respectively connected to the heating unit 2 and the particulate decomposition unit 3. It is configured to absorb the sound energy of the exhaust gas flowing through the silencer 4 in order to reduce exhaust gas noise.

[0065] With the above configuration, the exhaust gas is heated by the heating unit 2 and then flows into the silencer 4. Under the action of the silencer 4, the exhaust gas noise is reduced.

[0066] In some exemplary embodiments, reference is made to Figure 1 The silencer 4 includes a cylindrical body 41 and a plurality of silencers 42. The cylindrical body 41 extends along a first direction and is installed inside the housing 1. The plurality of silencers 42 are sequentially installed inside the cylindrical body 41 in a circumferential direction. Each silencer 42 extends along the first direction and is configured to communicate with the interior of the cylindrical body 41, so that the sound waves generated by the exhaust gas flow flow back and forth through the silencer 42 and the cylindrical body 41 to absorb the energy of the sound waves.

[0067] With the above-described configuration, after the exhaust gas flows into the cylinder 41, the sound waves generated by the exhaust gas flow repeatedly pass through the silencer 42 and the cylinder 41, absorbing the energy of the sound waves and reducing exhaust gas noise. Furthermore, by sequentially arranging multiple silencers 42 along the circumferential direction inside the cylinder 41, the number of times the sound waves repeatedly flow between the silencers 42 and the cylinder 41 is increased, further enhancing the energy loss of the sound waves, improving the sound wave energy absorption effect, and further improving the noise reduction effect of the exhaust gas.

[0068] Figure 6 This is a plan view of the silencer component of the exhaust gas purification and noise reduction device for a diesel engine according to an embodiment of this disclosure.

[0069] In some exemplary embodiments, reference is made to Figure 1 as well as Figure 6 The silencing component 42 includes a tube body 421 and a plurality of second micropores 422. The tube body 421 extends along a first direction, and its two ends are connected to the heating part 2 and the particle decomposition part 3 respectively via connecting ends 423. The plurality of second micropores 422 are formed in a matrix on the sidewall of the tube body 421.

[0070] With the above-described configuration, sound waves flow into or out of the pipe 421 through the second micro-hole 422, thus connecting the pipe 421 and the cylinder 41. This allows the sound waves to repeatedly flow through the cylinder 41 and the pipe 421, satisfying the requirement for the sound waves to flow back and forth between the silencer 42 and the cylinder 41. When the sound waves flow through the second micro-hole 422, friction and damping occur between the sound waves and the second micro-hole 422, causing some of the sound wave energy to be converted into heat energy, thereby achieving sound energy loss in the exhaust gas. Furthermore, by setting multiple second micro-holes 422 arranged in a matrix on the side wall of the pipe 421, the regularity of the sound waves flowing back and forth between the silencer 42 and the cylinder 41 is improved, increasing the degree of sound wave energy loss and further enhancing the noise reduction effect of the exhaust gas.

[0071] In some exemplary embodiments, reference is made to Figure 1 The heating section 2 includes multiple sets of interconnected heating elements 21.

[0072] In this embodiment, the exhaust gas is heated by a heating section 2 comprising multiple interconnected heating elements 21 to form a high-temperature exhaust gas flow.

[0073] According to exemplary embodiments of the present disclosure, a rail vehicle is provided, including the exhaust gas purification and noise reduction device for a diesel engine described in the above embodiments.

[0074] By implementing the above-mentioned design, the decomposition rate of carbon particulate matter in the exhaust gas of the diesel engine of rail vehicles is increased, thereby improving the exhaust gas purification effect and reducing the amount of carbon particulate matter emitted into the external environment. Furthermore, this reduces the exhaust noise of rail vehicles, minimizing its impact on passengers and the environment.

[0075] The embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0076] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0077] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A device for purifying and reducing noise from diesel engine exhaust gas, comprising: The housing (1) is provided with an air inlet (11) and an exhaust outlet (12); A heating unit (2) is installed inside the housing (1) on the side near the air inlet (11) and communicates with the air inlet (11), and is suitable for heating the exhaust gas flowing in from the air inlet (11); and The particulate decomposition unit (3) is installed inside the housing (1) on the side near the exhaust port (12) and communicates with the exhaust port (12). It is configured to decompose carbon particulate matter in the exhaust gas flowing through the particulate decomposition unit (3). The high-temperature exhaust gas formed by heating by the heating section (2) enters the particle decomposition section (3) and can heat and decompose the carbon particles remaining in the particle decomposition section (3). The particulate decomposition section includes a substrate extending along a first direction, on which a plurality of first micropores for supporting the catalyst are formed. The exhaust end of the substrate is configured to be closed at intervals along the first direction, forming first air passages that are closed at the exhaust end and second air passages that are open at the exhaust end, which are distributed at intervals along the first direction. This allows the exhaust gas flowing through the first air passage to flow into the second air passage through the first micropores formed on the sidewall of the first air passage, thereby changing the flow direction of the exhaust gas and allowing the carbon particles in the exhaust gas to come into full contact with the catalyst loaded on the first micropores.

2. The exhaust gas purification and noise reduction device for diesel engines according to claim 1, wherein, One end of the substrate (31) extending along the first direction is connected to the heating part (2) to receive the exhaust gas heated by the heating part (2), and one end of the substrate (31) extending along a second direction perpendicular to the first direction is connected to the exhaust port (12).

3. The exhaust gas purification and noise reduction device for diesel engines according to claim 2, wherein, The substrate (31) includes: The outer casing (319) extends along the first direction; and Multiple substrates (315) are respectively installed inside the housing (319). Each substrate (315) extends in a plane perpendicular to the first direction. A cavity (316) is formed between two adjacent substrates (315). The multiple cavities (316) are provided with baffles (317) at intervals at the exhaust end (312), such that one cavity (316) of two adjacent cavities (316) is closed at the exhaust end (312) and the other cavity (316) is open at the exhaust end (312).

4. The exhaust gas purification and noise reduction device for diesel engines according to claim 3, wherein, The outer shell (319) is constructed as a hollow cylinder with a generally circular cross-section; The substrate (315) is constructed as a generally circular thin plate, and a plurality of first micropores (311) extending along the first direction are formed on the substrate (315). The inner sidewall of the housing (319) is provided with a plurality of connectors (318) to connect the substrate (315) to the interior of the housing (319).

5. The exhaust gas purification and noise reduction device for diesel engines according to claim 2, wherein, The matrix (31) is made of a porous material loaded with a catalyst.

6. The exhaust gas purification and noise reduction device for a diesel engine according to claim 5, wherein, The substrate (31) is made of gold or platinum with a porous structure.

7. The exhaust gas purification and noise reduction device for a diesel engine according to any one of claims 1-6, further comprising: The silencing part (4) is installed inside the housing (1) and its two ends are respectively connected to the heating part (2) and the particle decomposition part (3). It is configured to absorb the sound energy of the exhaust gas flowing through the silencing part (4) in order to reduce exhaust gas noise.

8. The exhaust gas purification and noise reduction device for a diesel engine according to claim 7, wherein, The noise reduction part (4) includes: A cylindrical body (41), extending along the first direction, is installed inside the housing (1); and Multiple silencers (42) are installed sequentially inside the cylinder (41) along the circumferential direction. Each silencer (42) extends along the first direction and is configured to communicate with the interior of the cylinder (41), so that the sound waves formed by the exhaust gas flow flow back and forth through the silencer (42) and the cylinder (41) to absorb the energy of the sound waves.

9. The exhaust gas purification and noise reduction device for a diesel engine according to claim 8, wherein, The silencer (42) includes: A tube (421) extends along the first direction, and both ends of the tube (421) are connected to the heating part (2) and the particle decomposition part (3) respectively via connecting ends (423); and Multiple second micropores (422) are formed in a matrix on the sidewall of the tube (421).

10. The exhaust gas purification and noise reduction device for a diesel engine according to claim 1, wherein, The heating section (2) includes multiple sets of interconnected heating elements (21).

11. A rail vehicle comprising the exhaust gas purification and noise reduction device for a diesel engine as described in any one of claims 1-10.

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