Siliceous high-efficiency particulate trapping filter material

Abstract

The utility model relates to the technical field of particulate trapping, in particular to a siliceous high-efficiency particulate trapping filter material which comprises a frame-shaped supporting layer, the top of the supporting layer is connected with an upper filter layer, the bottom of the supporting layer is connected with a lower filter layer, and the upper filter layer and the lower filter layer are made of the same material. The upper filtering layer and the lower filtering layer are made of silicides, a plurality of upper filtering holes are formed in the top of the upper filtering layer, a plurality of lower filtering holes are formed in the top of the lower filtering layer, the number of the upper filtering holes and the number of the lower filtering holes are consistent, the upper filtering holes and the lower filtering holes are in one-to-one correspondence, and the corresponding upper filtering holes and the corresponding lower filtering holes are arranged in a staggered mode. By means of the double-layer filtering structure, particles can be filtered and captured twice, then the capturing efficiency of the particles is improved, the upper filtering holes and the lower filtering holes are formed in a staggered mode, when the particles are filtered, the probability that the particles make contact with the inner walls of the upper filtering holes or the inner walls of the lower filtering holes can be increased, then the adsorption probability is increased, and finally the capturing efficiency of the particles is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of particulate trapping, particularly relates to a silicon high -efficient particulate trapping filter material. BACKGROUND

[0002] The diesel particulate filter (DPF) is installed on the exhaust pipe of the diesel engine, and the exhaust gas is diffused, intercepted, inertially collided and gravity settled when passing, and is trapped, so as to purify the exhaust particulate. The trapping efficiency is mainly affected by factors such as particle size, filter body micropore diameter, exhaust flow rate and airflow temperature. After a certain amount of particulate is trapped, the back pressure of the trap rises, the filtration efficiency decreases, and the operation of the diesel engine is affected, so the trapped particulate needs to be oxidized and burned to realize the regeneration of the trap.

[0003] At present, the wall flow honeycomb ceramic formed by extrusion is widely used as the main structure of DPF in developed countries. Many parallel honeycomb channels are opened in the axial direction, and the ends of adjacent honeycomb channels are alternately blocked. This structure forces the diesel exhaust gas to enter from the open inlet channel, passes through the porous ceramic wall surface into the adjacent outlet open channel, and the particulate is deposited on the wall surface of each inlet channel, so it is called wall flow honeycomb ceramic.

[0004] The key technology of the wall flow DPF lies in the material. Due to the harsh regeneration environment, the material constituting the DPF should have a series of performances such as high temperature resistance, low thermal expansion coefficient, high thermal conductivity, excellent corrosion resistance and mechanical strength.

[0005] Therefore, it is necessary to provide a silicon high -efficient particulate trapping filter material to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0006] In order to solve the above technical problems, the utility model provides a silicon high -efficient particulate trapping filter material.

[0007] The utility model provides a silicon high -efficient particulate trapping filter material, it includes: the support layer of frame type is connected with the upper filter layer in the top of support layer, the bottom of support layer is connected with lower filter layer, the size of upper filter layer and lower filter layer is identical, the material of upper filter layer and lower filter layer is identical, the material of upper filter layer and lower filter layer is silicide, a plurality of upper filter holes are equipped in the top of upper filter layer, the upper filter hole is from the top of upper filter layer and penetrates to the bottom of upper filter layer, a plurality of lower filter holes are equipped in the top of lower filter layer, the lower filter hole is from the top of lower filter layer and penetrates to the bottom of lower filter layer, the quantity of upper filter hole and lower filter hole is identical, and one -to -one correspondence is established, and the corresponding upper filter hole and lower filter hole are misaligned.

[0008] Preferably, the silicide is one of silicon carbide or silicon nitride.

[0009] Preferably, the material of the support layer is one of silicon carbide or silicon nitride, and the support layer is welded with the upper filter layer and the lower filter layer by solder.

[0010] Preferably, the inner side of the support layer is provided with a filter screen, and the upper filter holes and the lower filter holes are located between the meshes of the filter screen.

[0011] Preferably, the top of the upper filter layer is connected with a dust suction layer made of metal, and the dust suction layer is in a mesh structure.

[0012] Preferably, the bottom of the lower filter layer is connected with a second support layer, the bottom of the second support layer is connected with a second lower filter layer, the top of the second lower filter layer is provided with second lower filter holes, the number of the second lower filter holes is consistent with that of the lower filter holes, and the corresponding second lower filter holes and the lower filter holes are arranged in a staggered mode.

[0013] Preferably, the material of the second lower filter layer is consistent with that of the lower filter layer.

[0014] Compared with the prior art, the silicon high-efficiency particle trapping filter provided by the utility model has the following beneficial effects:

[0015] 1. The upper filter layer and the lower filter layer are connected through the support layer, and the double-layer filter structure can filter and trap the particles twice, thereby improving the trapping efficiency of the particles.

[0016] 2. The filter screen is arranged to divide the support layer, so that the particles can pass through the corresponding meshes, the probability of the particles contacting the inner walls of the upper filter holes or the lower filter holes is improved, the adsorption probability is improved, and the trapping efficiency of the particles is improved.

[0017] 3. The dust suction layer is arranged to filter the larger foreign matters, prevent the foreign matters from entering the upper filter holes and blocking the upper filter holes, and affect the subsequent use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structure schematic view of a preferred embodiment of the silicon high-efficiency particle trapping filter provided by the utility model;

[0019] Figure 2For Figure 1 The structural schematic diagram of the support layer, the upper filter layer and the lower filter layer is shown in the figure.

[0020] Figure 3 For Figure 1 The structural schematic diagram of the dust suction layer is shown in the figure.

[0021] Figure 4 For Figure 1 The structural schematic diagram of the second lower filter layer is shown in the figure.

[0022] Figure label: 1, support layer; 2, upper filter layer; 3, lower filter layer; 4, upper filter hole; 5, filter screen; 6, lower filter hole; 7, dust suction layer; 8, second support layer; 9, second lower filter layer; 10, second lower filter hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0024] Reference Figures 1 to 4 The utility model provides a kind of siliceous high-efficiency particulate arresting filter material, comprising: frame type support layer 1, the top of the support layer 1 is connected with upper filter layer 2, the bottom of the support layer 1 is connected with lower filter layer 3, the size of the upper filter layer 2 and lower filter layer 3 is identical, the material of the upper filter layer 2 and lower filter layer 3 is identical, the material of the upper filter layer 2 and lower filter layer 3 is silicide, the top of the upper filter layer 2 is equipped with a plurality of upper filter holes 4, the upper filter hole 4 is from the top of the upper filter layer 2 and penetrates to the bottom of the upper filter layer 2, the top of the lower filter layer 3 is equipped with a plurality of lower filter holes 6, the lower filter hole 6 is from the top of the lower filter layer 3 and penetrates to the bottom of the lower filter layer 3, the number of the upper filter hole 4 and lower filter hole 6 is identical, and one-to-one correspondence is set, and the corresponding upper filter hole 4 and lower filter hole 6 are set in dislocation.

[0025] It should be noted that: by setting upper filter layer 2 and lower filter layer 3, it can be connected by support layer 1, and by double-layer filter structure, particulate can be filtered and captured twice, to improve the capture efficiency of particulate, and by setting upper filter hole 4 and lower filter hole 6, particulate can pass through upper filter hole 4 and lower filter hole 6, when passing through filter hole, particulate contacts with the inner wall of filter hole, is adsorbed by the inner wall of filter hole, and by setting upper filter hole 4 and lower filter hole 6 in dislocation, the probability of particulate contacting with the inner wall of upper filter hole 4 or lower filter hole 6 can be improved when filtering particulate, to improve the adsorption probability, finally improve the capture efficiency of particulate.

[0026] In the embodiment of the utility model, reference Figure 1 As shown in the figure, the silicide adopts one of silicon carbide or silicon nitride.

[0027] It should be noted that: silicon carbide has high mechanical strength, not easy to fatigue, acid and ash corrosion, but also has a large heat capacity and thermal conductivity, high thermal expansion coefficient, silicon nitride has excellent thermal shock resistance. Silicon nitride microstructure has many micro convex, can effectively increase the specific surface area of catalyst, improve the contact area of soot and catalyst, can effectively improve the regeneration efficiency.

[0028] In the embodiment of the utility model, reference Figure 1 As shown in the figure, the material of the support layer 1 is one of silicon carbide or silicon nitride, the support layer 1 and the upper filter layer 2, the support layer 1 and the lower filter layer 3 are welded by solder.

[0029] In the embodiment of the utility model, reference Figure 1 As shown in the figure, the inner side of the support layer 1 is provided with a filter screen 5, and the upper filter hole 4 and the lower filter hole 6 are located between the meshes of the filter screen 5.

[0030] It should be noted that: by setting filter screen 5, support layer 1 can be segmented, which is convenient for passing particles from the corresponding mesh, improves the probability of contact between particles and the inner wall of upper filter hole 4 or lower filter hole 6, and further improves the adsorption probability, finally improves the trapping efficiency of particles.

[0031] In the embodiment of the utility model, reference Figure 3 As shown in the figure, the top of the upper filter layer 2 is connected with dust suction layer 7 made of metal material, and the dust suction layer 7 is a mesh structure.

[0032] It should be noted that: by setting dust suction layer 7, the size of the foreign matter can be filtered, to prevent foreign matter from entering the upper filter hole 4, to prevent the upper filter hole 4 from being blocked, and to affect the subsequent use.

[0033] In the embodiment of the utility model, reference Figure 4 As shown in the figure, the bottom of the lower filter layer 3 is connected with the second support layer 8, the bottom of the second support layer 8 is connected with the second lower filter layer 9, the top of the second lower filter layer 9 is provided with the second lower filter hole 10, the number of the second lower filter hole 10 is consistent with the lower filter hole 6, and they are one-to-one corresponding, and the corresponding second lower filter hole 10 and the lower filter hole 6 are arranged in dislocation.

[0034] It should be noted that: by setting the second lower filter layer 9, the particles can be filtered and adsorbed twice, which can effectively improve the adsorption efficiency of the particles.

[0035] In the embodiment of the utility model, reference Figure 4As shown, the material of the second lower filter layer 9 is consistent with that of the lower filter layer 3.

[0036] The working principle of the siliceous high-efficiency fine particle trapping filter material is as follows:

[0037] The upper filter layer 2 and the lower filter layer 3 are connected through the support layer 1, and the double-layer filter structure can filter and trap the fine particles twice, thereby improving the trapping efficiency of the fine particles.

[0038] The circuit and the control involved in the utility model are prior art, and will not be described in detail here.

[0039] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A siliceous high-efficiency particulate arresting filter material, characterized by, include: A frame-shaped support layer (1) is provided. An upper filter layer (2) is connected to the top of the support layer (1), and a lower filter layer (3) is connected to the bottom of the support layer (1). The upper filter layer (2) and the lower filter layer (3) have the same size and are made of the same material. The upper filter layer (2) and the lower filter layer (3) are made of silicide. The upper filter layer (2) has multiple upper filter holes (4) on its top. The upper filter holes (4) extend from the top of the upper filter layer (2) to the bottom of the upper filter layer (2). The lower filter layer (3) has multiple lower filter holes (6) on its top. The lower filter holes (6) extend from the top of the lower filter layer (3) to the bottom of the lower filter layer (3). The number of upper filter holes (4) and lower filter holes (6) are the same and correspond one-to-one. The corresponding upper filter holes (4) and lower filter holes (6) are staggered.

2. The siliceous high efficiency particulate arresting filter medium of claim 1, wherein, The silicide is either silicon carbide or silicon nitride.

3. The siliceous high efficiency particulate arresting filter medium of claim 1, wherein, The support layer (1) is made of either silicon carbide or silicon nitride. The support layer (1) is welded to the upper filter layer (2) and the support layer (1) is welded to the lower filter layer (3) by flux.

4. The siliceous high efficiency particulate arresting filter medium of claim 1, wherein, A filter screen (5) is installed on the inner side of the support layer (1), and the upper filter hole (4) and the lower filter hole (6) are located between the mesh of the filter screen (5).

5. The siliceous high efficiency particulate arresting filter medium according to claim 4, wherein The top of the upper filter layer (2) is connected to a dust-absorbing layer (7) made of metal, which has a mesh structure.

6. The siliceous high efficiency particulate arresting filter medium according to claim 5, wherein, The bottom of the lower filter layer (3) is connected to a second support layer (8), the bottom of the second support layer (8) is connected to a second lower filter layer (9), the top of the second lower filter layer (9) is provided with a second lower filter hole (10), the number of the second lower filter hole (10) is the same as that of the lower filter hole (6), and they correspond one to one. The corresponding second lower filter hole (10) and the lower filter hole (6) are misaligned.

7. The siliceous high efficiency particulate arresting filter medium according to claim 6, wherein The material of the second lower filter layer (9) is the same as that of the lower filter layer (3).

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