Ceramic carrier for purifying exhaust gas of motor vehicle

Abstract

This utility model discloses a ceramic carrier for purifying motor vehicle exhaust emissions, relating to the field of automotive exhaust treatment technology. It includes a cylindrical ceramic filter body one, a ceramic filter body two at the outer end of the ceramic filter body one, a protective layer at the outer end of the ceramic filter body two, and a buffer layer between the ceramic filter body two and the protective layer. The ceramic filter body one has multiple vent holes one, and the ceramic filter body two has multiple vent holes two. By setting smaller and denser vent holes one on the ceramic filter body one at the center, more catalyst can be loaded, while larger and less dense vent holes two on the ceramic filter body two at the edge can load less catalyst, thus improving catalyst utilization. The wavy design of the vent holes one and two slows down the exhaust gas's forward speed, increases the contact time between the exhaust gas and the catalyst layer, and effectively improves exhaust gas purification. The triangular and hexagonal pore structures are stable and have stronger load-bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of automotive exhaust gas treatment technology, specifically a ceramic carrier for purifying motor vehicle exhaust emissions. Background Technology

[0002] Motor vehicle exhaust poses a significant threat to humans and the environment, becoming one of the main sources of air pollution. Catalytic conversion technology is currently the most effective way to control motor vehicle exhaust, and the core of this technology is the catalytic converter. The main components of the catalytic converter are the carrier and the catalytic coating. The catalytic purification of motor vehicle exhaust is achieved by coating the carrier with active materials.

[0003] Catalyst supports are generally ceramic honeycomb supports with linear parallel through-hole structures. During use, the contact time between the catalyst coating and the exhaust gas is short, the probability of reaction contact is not high, and the exhaust gas purification is insufficient. In addition, the pores of the catalyst support are mostly uniformly distributed, and a large amount of gas gathers in the central part of the support, while the pores at the edge of the support have less gas passage. This results in an excessively high catalyst reaction load in the central part of the support, which can easily lead to premature catalyst deactivation and thermal decay.

[0004] Based on this, a ceramic carrier for purifying motor vehicle exhaust emissions is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a ceramic carrier for purifying motor vehicle exhaust emissions, so as to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A ceramic carrier for purifying motor vehicle exhaust emissions includes a cylindrical ceramic filter body one, a ceramic filter body two at the outer end of the ceramic filter body one, a protective layer at the outer end of the ceramic filter body two, a buffer pad layer between the ceramic filter body two and the protective layer, a plurality of vent holes one in the ceramic filter body one, and a plurality of vent holes two in the ceramic filter body two.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the first vent is a wavy through hole, and the second vent is a wavy through hole.

[0010] In one alternative: the cross-section of the first vent is an equilateral triangle with a side length of a, and the cross-section of the second vent is a regular hexagon with a side length of b.

[0011] In one alternative: the side length a of the cross-section of the first vent is equal to the side length b of the cross-section of the second vent, and the pore density of the first vent is 6:1 of the pore density of the second vent.

[0012] In one alternative: the outer end of the protective layer is provided with two symmetrically distributed T-shaped grooves.

[0013] In one alternative: the ceramic filter body one and the ceramic filter body two are made of cordierite, mullite or silicon carbide.

[0014] In one alternative: the cushioning layer is made of silicone rubber.

[0015] In one alternative: the protective layer is made of a high-temperature resistant metal material.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention features a ceramic filter body at the center with smaller, denser vent holes, allowing for a larger catalyst load. A ceramic filter body at the edge has larger, less dense vent holes, enabling a smaller catalyst load and better aligning with airflow distribution, thus improving overall catalyst utilization. Furthermore, the wavy design of the vent holes alters the direction of exhaust gas flow, slowing its speed and increasing contact time and opportunities between the exhaust gas and the catalyst layer, effectively improving exhaust gas purification. The triangular and hexagonal pore structures also provide stability and stronger load-bearing capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the vent hole of this utility model.

[0020] Figure 3 This is a cross-sectional view of the present invention.

[0021] Figure 4 This is a partial enlarged view of the two vent holes of this utility model.

[0022] Figure label annotations: 100, ceramic filter body one; 101, vent one; 200, ceramic filter body two; 201, vent two; 300, protective layer; 301, T-shaped groove; 400, buffer pad layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figures 1-4 The present invention discloses a ceramic carrier for purifying motor vehicle exhaust emissions, comprising a cylindrical ceramic filter body 100, a ceramic filter body 200 at the outer end of the ceramic filter body 100, a protective layer 300 at the outer end of the ceramic filter body 200, and a buffer layer 400 between the ceramic filter body 200 and the protective layer 300. The ceramic filter body 100 and the ceramic filter body 200 each have multiple vent holes 101 and 201 respectively. By using the ceramic filter body 100 and the ceramic filter body 200, motor vehicle exhaust emissions are effectively absorbed. The protective layer 300 helps maintain the integrity of the ceramic carrier, providing physical protection and helping to maintain filtration efficiency. The buffer layer 400 helps absorb external vibrations and impacts, reducing the impact of these forces on the filtration system, thereby extending the lifespan of the equipment.

[0025] In this embodiment, as Figure 3 As shown, the first vent 101 is a wavy through hole, and the second vent 201 is a wavy through hole. The wavy design can change the direction of the exhaust gas, slow down the exhaust gas speed, increase the contact time and contact opportunities between the exhaust gas and the catalyst layer, increase the reaction contact area, ensure that the catalytic reaction is fully carried out, and effectively improve the purification of exhaust gas.

[0026] In one embodiment, such as Figure 4 As shown, the cross-section of the first vent 101 is an equilateral triangle with a side length of a, and the cross-section of the second vent 201 is a regular hexagon with a side length of b. The triangular and hexagonal hole structures are stable, which makes the overall load-bearing capacity of the ceramic carrier stronger.

[0027] In one embodiment, such as Figure 4 As shown, the side length a of the cross-section of ventilator 101 is equal to the side length b of the cross-section of ventilator 201. The pore density of ventilator 101 is 6:1 compared to the pore density of ventilator 201. Since the side length a of the cross-section of ventilator 101 is equal to the side length b of the cross-section of ventilator 201, the cross-sectional area of ​​ventilator 201 is 6 times that of ventilator 101. Also, because the pore density of ventilator 101 is 6:1 compared to ventilator 201, the ventilator 101 on the ceramic filter body 100 located in the center is smaller and has a higher density, allowing it to carry more catalyst. The ventilator 201 on the ceramic filter body 200 located at the edge is larger and has a lower density, carrying less catalyst. This better matches the airflow distribution pattern and improves the overall utilization rate of the catalyst.

[0028] In one embodiment, such as Figure 2As shown, the outer end of the protective layer 300 is provided with two symmetrically distributed T-shaped grooves 301, which facilitates fixing the ceramic carrier in the motor vehicle exhaust emission purification device, prevents the ceramic carrier from shaking, and helps maintain the integrity of the ceramic carrier.

[0029] In one embodiment, such as Figure 1 As shown, the ceramic filter body 100 and the ceramic filter body 200 are made of cordierite, mullite or silicon carbide, and have good thermal shock resistance and high strength, as well as good oxidation resistance.

[0030] In one embodiment, such as Figure 1 As shown, the buffer layer 400 is made of silicone rubber. The silicone rubber buffer layer 400 helps to absorb external vibrations and impacts, reduce the impact of these forces on the filtration system, and thus extend the life of the equipment.

[0031] In one embodiment, such as Figure 1 As shown, the protective layer 300 is made of high-temperature resistant metal material. Since the ceramic carrier is relatively brittle, the protective layer 300 helps to maintain the integrity of the ceramic carrier, provides physical protection, and also helps to maintain filtration efficiency.

[0032] The above embodiments disclose a ceramic carrier for purifying motor vehicle exhaust emissions. The ceramic carrier is fixed in the motor vehicle exhaust emission purification device by a T-shaped groove 301. The ceramic filter body 100 at the center has small and dense vent holes 101, which can load more catalyst. The ceramic filter body 200 at the edge has large and low-density vent holes 201, which can load less catalyst and better conform to the airflow distribution, improving the overall utilization rate of the catalyst. By designing the wavy shape of the vent holes 101 and 201, the direction of exhaust gas can be changed, the exhaust gas speed can be slowed down, the contact time and contact opportunity between exhaust gas and catalyst layer can be increased, the reaction contact area can be increased, and the catalytic reaction can be fully carried out, effectively improving exhaust gas purification. Moreover, the triangular and hexagonal pore structure is stable and has a stronger load-bearing capacity.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ceramic carrier for purifying motor vehicle exhaust emissions, comprising a cylindrical ceramic filter element (100), characterized in that, The ceramic filter body one (100) is provided with a ceramic filter body two (200) at its outer end. The ceramic filter body two (200) is provided with a protective layer (300) at its outer end. A buffer pad layer (400) is provided between the ceramic filter body two (200) and the protective layer (300). The ceramic filter body one (100) is provided with a plurality of vent holes one (101), and the ceramic filter body two (200) is provided with a plurality of vent holes two (201).

2. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, Ventilation hole one (101) is a wavy through hole, and ventilation hole two (201) is a wavy through hole.

3. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, The cross-section of the first vent (101) is an equilateral triangle, and the side length of the cross-section of the first vent (101) is a. The cross-section of the second vent (201) is a regular hexagon, and the side length of the cross-section of the second vent (201) is b.

4. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 3, characterized in that, The side length a of the cross-section of the first ventilation hole (101) is equal to the side length b of the cross-section of the second ventilation hole (201), and the pore density of the first ventilation hole (101) is 6:

1.

5. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, The outer end of the protective layer (300) is provided with two symmetrically distributed T-shaped grooves (301).

6. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, The ceramic filter body one (100) and ceramic filter body two (200) are made of cordierite, mullite or silicon carbide.

7. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, The cushioning pad (400) is made of silicone rubber.

8. The ceramic carrier for purifying motor vehicle exhaust emissions according to claim 1, characterized in that, The protective layer (300) is made of high-temperature resistant metal material.

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