High-temperature-resistant filter cartridge for high-frequency blowback

Abstract

The utility model discloses a high-temperature-resistant filter cartridge for high-frequency blowback in the technical field of air purification filters, and aims to solve the problems that most of filter cartridges in the prior art can meet the high-temperature-resistant requirement, but the filter cartridges fail after long-time high-frequency blowback and the like, the high-temperature-resistant filter cartridge comprises a filter element and an end cover, the filter element is a hollow cylinder, and the end cover is arranged on the filter element. A surface protecting net is arranged on the inner wall; the end covers are arranged on the two sides of the filter element and are in a circular ring shape, the inner diameter of each circular ring corresponds to the inner diameter of the surface protecting net, and the surface protecting net is connected with the end covers through fixing pieces. The high-frequency and large-air-volume blowing device can be used for blowing under the conditions of high frequency and large air volume, and can also bear the temperature of 150-200 DEG C.

Description

Technical Field

[0001] The utility model relates to a high-temperature resistant filter cartridge for high-frequency backwashing, belonging to the technical field of air purification filters. Background Art

[0002] The filter cartridge is one of the commonly used air purification filters, and is used to treat high-concentration and high-temperature dust in industries such as steel, cement, and lithium batteries. During actual operation, the filter cartridge can effectively absorb dust or particulate matter. In order to maintain the filtering effect, most filter cartridges need to be periodically removed from the filter cartridge by pulse jetting. The huge pressure brought by the jetting requires the filter cartridge to have a stable structure to ensure its normal operation.

[0003] At the same time, with the continuous development of industrial technology, the filtering demand in high-temperature environments is increasing day by day. Traditional filter cartridges are prone to deformation, melting, and performance degradation in high-temperature environments, and cannot meet the requirements of high-temperature filtration. Therefore, high-temperature resistant filter cartridges have become one of the important filters in the filtration field. At present, how to ensure the stable and efficient operation of the filter cartridge at 150-200°C is still a major problem. Most filter cartridges can meet the high-temperature resistance requirements, but the filter cartridges will fail after long-term high-frequency jetting. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a high-temperature resistant filter cartridge for high-frequency backwashing, which can be jetted under the conditions of high frequency and large air volume, and can also withstand the temperature of 150-200°C.

[0005] To achieve the above purpose, the utility model is implemented by the following technical solution: A high-temperature resistant filter cartridge for high-frequency backwashing, including a filter element and end caps. The filter element is a hollow cylinder, and its inner wall is provided with a protective mesh. The two end caps are respectively arranged on both sides of the filter element. The end caps are annular, and the inner diameter of the ring is corresponding to the inner diameter of the protective mesh. The protective mesh is connected to the end cap through a fixing member.

[0006] Optionally, the fixing member is an L-shaped aluminum angle, and the L-shaped aluminum angle includes a first part and a second part that are perpendicularly connected. The first part is provided with a first through hole, and the end cap is provided with a second through hole corresponding to the position of the first through hole. The first through hole and the second through hole are provided with rivets, and the first through hole and the second through hole are connected through the rivets. The second part is connected to the protective mesh by spot welding.

[0007] Optionally, the filter element includes a base material, and a polytetrafluoroethylene film is thermally coated on the surface of the base material. An inorganic nano high-temperature resistant coating is coated on the surface of the polytetrafluoroethylene film. The material of the base material is aramid, polyphenylene sulfide, or polyimide.

[0008] Optionally, a plurality of straps are disposed at intervals around the outside of the filter element. A strap fixing piece is provided at the bonding portion of the straps, and the strap fixing piece is used to fix the bonding portion of the straps.

[0009] Optionally, the strap fixing piece is made of stainless steel and has a U-shaped configuration. Through holes are formed in both sides of the strap fixing piece, and rivets are provided for the through holes to fasten both sides of the strap fixing piece.

[0010] Optionally, a strap glue is coated on the inner circumference of the strap, and the width of the strap glue is 3 mm.

[0011] Optionally, the strap glue is coated on the inner circumference of the strap along an S-shaped curve.

[0012] Optionally, an end cap glue is coated on the lower surface of the end cap, and the end cap glue is used to connect the end cap to the filter element and the surface protection net.

[0013] Optionally, an expander is filled between the inner and outer walls of the end cap and the filter element, and the expander located on the inner wall of the filter element abuts against the end cap.

[0014] Optionally, the surface protection net is a diamond-shaped net, and the parameters of the diamond-shaped net include a net thickness of 1.0 mm, a mesh size of 10×20 mm, and a wire diameter of 1.4 mm.

[0015] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0016] In the present utility model, the end cap and the surface protection net are fixed by an L-shaped aluminum angle connection. The design of the L-shaped aluminum angle connection can generally provide good stability. Even in an environment of high temperature + high-frequency jet blowing, since one end is welded to the surface protection net and the other end is riveted to the end cap, it can effectively prevent the loosening or falling off of the end cap and the surface protection net. At the same time, the L-shaped aluminum angle connection can adapt to filter elements, end caps and surface protection nets of different sizes, providing flexible connection methods to meet the application requirements in different scenarios. And in cooperation with straps, end cap glue, strap glue, expander, etc., the filter cartridge is further fastened;

[0017] The filter cartridge strap of the present utility model adopts a fixing method of a U-shaped strap fixing piece + rivet + heat-resistant strap glue to tightly combine the strap with the filter element and is not easy to loosen, providing good stability and reliability. This is particularly important for filter cartridges that need to operate at high temperatures for a long time and withstand a high-frequency jet blowing environment, and can ensure that the strap bonding does not fail during the long-term use of the equipment;

[0018] The filter element of the present utility model adopts aramid, polyphenylene sulfide and polyimide fibers + PTFE membrane (polytetrafluoroethylene membrane) + ceramic membrane (inorganic nano high-temperature resistant coating). The three-layer reinforcement enables it to still have good filtration efficiency at high temperatures, and it is not easily deformed under high-frequency blowing, with stable structure and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic side-sectional structure diagram of a high-temperature resistant filter cartridge for high-frequency backwashing in an embodiment of the present utility model;

[0020] Figure 2 It is a schematic inner surface structure diagram of the end cover of a high-temperature resistant filter cartridge for high-frequency backwashing in an embodiment of the present utility model;

[0021] Figure 3 It is a schematic outer surface structure diagram of the end cover of a high-temperature resistant filter cartridge for high-frequency backwashing in an embodiment of the present utility model;

[0022] Figure 4 It is a schematic diagram of the air inlet and outlet flow direction of a high-temperature resistant filter cartridge for high-frequency backwashing in an embodiment of the present utility model;

[0023] In the figure: 1 end cover, 2 expander, 3 L-shaped aluminum angle, 4 filter element, 5 strap, 6 strap fixing piece, 7 strap glue, 8 protective mesh, 9 end cover glue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment 1

[0027] As Figure 1 shown, the high-temperature resistant filter cartridge for high-frequency backwashing provided by the embodiment of the present utility model includes a filter element 4 and end caps 1. The end caps 1 are arranged on both sides of the filter element 4. The filter element 4 is integrally in the shape of a hollow cylinder, and its inner wall is provided with a surface protection net 8. Fixing members are symmetrically arranged on the inner walls on both sides of the filter element 4, and the surface protection net 8 and the end caps 1 are connected through the fixing members.

[0028] In this embodiment, the fixing member adopts an L-shaped aluminum angle 3. The L-shaped aluminum angle 3 includes a first part and a second part that are perpendicularly connected. The first part is provided with a first through hole, and the end cap 1 is provided with a second through hole corresponding to the position of the first through hole. The through holes are provided with rivets, and the first through hole and the second through hole are connected through the rivets. The second part is connected to the surface protection net 8. In this embodiment, the connection method adopts spot welding, but is not limited thereto. Any other connection method that can achieve fixation should be acceptable.

[0029] The design of connecting through the L-shaped aluminum angle 3 can usually provide good stability. Even in an environment of high temperature + high-frequency jet blowing, because one end is welded to the surface protection net 8 and the other end is riveted to the end cap 1, it can effectively prevent the loosening or falling off of the end cap 1 and the surface protection net 8. At the same time, the connection of the L-shaped aluminum angle 3 can adapt to filter elements 4, end caps 1, and surface protection nets 8 of different sizes, providing flexible connection methods to meet the application requirements in different scenarios.

[0030] As Figure 2 and Figure 3 shown, the end cap 1 is integrally in the shape of a circular ring, and its inner surface is provided with inner and outer flanges. The inner diameter of the circular ring is the same as the inner diameter of the surface protection net 8. An end cap glue 9 is coated on the lower surface of the end cap 1. In this embodiment, the end cap glue 9 adopts an organic silicone or an imide resin. These glue materials are all high-temperature resistant and can achieve good connection between the end cap 1, the filter element 4, and the surface protection net 8.

[0031] An expanding agent 2 is filled between the inner and outer walls of both sides of the end cap 1 and the filter element 4. The expanding agent 2 can be expanded graphite. The expanding agent 2 is arranged at the inner and outer flanging parts of the end cap 1 and contacts with the inner and outer walls of the filter element 4. The expanding agent 2 can expand at a temperature of about 200 °C. The expansion of the expanding agent 2 at high temperature can well provide a support for the filter element 4, making the filter element 4 fit more closely with the protective mesh 8, preventing the filter element 4 from falling off and deforming under high-temperature and high-frequency jet blowing, improving the overall reliability of the filter cartridge in the high-temperature and high-frequency jet blowing environment, and ensuring the normal operation and service life of the filter cartridge.

[0032] In this embodiment, the filter element 4 includes a base material. The base material is made of aramid, polyphenylene sulfide or polyimide. A polytetrafluoroethylene membrane (PTFE membrane) is thermally coated on the surface of the base material, and an inorganic nano high-temperature resistant coating (ceramic membrane) is coated on the surface of the polytetrafluoroethylene membrane. Through the three-layer reinforcement of aramid, polyphenylene sulfide and polyimide fiber + PTFE membrane + ceramic membrane, it still has good filtration efficiency at high temperature, and is not easy to deform under high-frequency jet blowing, with stable structure and long service life.

[0033] The protective mesh 8 adopts a diamond-shaped mesh. The parameters of the diamond-shaped mesh include a mesh thickness of 1.0 mm, a mesh hole size of 10×20 mm, and a wire diameter of 1.4 mm. The protective mesh 8 can play a role in supporting the filter element, and at the same time can withstand higher pressure and impact force itself, so that the filter cartridge remains stable in a complex working environment (high-frequency jet blowing + high temperature) and is not easy to deform or be damaged. Embodiment 2

[0034] On the basis of Embodiment 1, this embodiment further includes a strap 5. A plurality of straps 5 are arranged around the outside of the filter element 4 at intervals. In this embodiment, the interval length is 250 mm. A strap fixing piece 6 for fixing the bonding part of the strap 5 is provided at the bonding part of the strap 5. The strap fixing piece 6 is made of stainless steel, and its shape is U-shaped. Through holes are opened on both sides of the strap fixing piece 6, and rivets are provided for the through holes, and the strap fixing piece 6 is fastened by the rivets.

[0035] In some embodiments, a strap glue 7 is coated on the inner circumference of the strap 5 for one week. The strap glue 7 is coated on the inner circumference of the strap 5 in an S shape, and its width is 3 mm. The material of the strap glue 7 can be selected from materials such as silicone rubber, phenolic resin or polyimide. These materials all have good temperature resistance and bonding performance, and the glue can be completely cured in about 12 h.

[0036] The filter cartridge strap adopts a fixing method of U-shaped strap fixing piece + rivet + heat-resistant strap glue to tightly combine the strap with the filter element and is not easy to loosen, providing good stability and reliability. This is particularly important for filter cartridges that need to operate at high temperature for a long time and withstand a high-frequency jet blowing environment, and can ensure that the strap bonding does not fail during long-term use of the equipment.

[0037] The working principle of the present utility model is as follows: As Figure 4 shown, the air inlet is at the outer periphery of the filter element 4, and the air flow sequentially passes through the filter element 4 and the protective mesh 8 and then flows out from the internal hollow part.

[0038] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A high-temperature resistant filter cartridge for high-frequency backwashing, characterized in that, It includes a filter element and end caps. The filter element is a hollow cylinder with a protective mesh on its inner wall; the two end caps are respectively arranged on both sides of the filter element. The end caps are annular, and the inner diameter of the ring corresponds to the inner diameter of the protective mesh. The protective mesh is connected to the end caps through fixing components. The fixing component is an L-shaped aluminum angle, which includes a first part and a second part connected perpendicular to each other; a first through hole is provided in the first part, and a second through hole corresponding to the position of the first through hole is provided on the end cap. The first through hole and the second through hole are provided with rivets, and the first through hole and the second through hole are connected through the rivets; the second part is connected to the protective mesh by spot welding.

2. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 1, wherein, The filter element includes a base material, a polytetrafluoroethylene film is thermally coated on the surface of the base material, and an inorganic nano high-temperature resistant coating is coated on the surface of the polytetrafluoroethylene film. The base material is made of aramid, polyphenylene sulfide or polyimide.

3. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 1, wherein A plurality of straps are arranged around the filter element at intervals, and a strap fixing piece is provided at the bonding part of the straps. The strap fixing piece is used to fix the bonding part of the straps.

4. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 3, characterized in that, The strap fixing piece is made of stainless steel and has a U-shaped shape. Through holes are provided on both sides of the strap fixing piece, and the through holes are provided with rivets to fasten both sides of the strap fixing piece through the rivets.

5. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 3, characterized in that, The inner side of the strap is coated with strap glue all around, and the width of the strap glue is 3 mm.

6. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 5, wherein The strap glue is coated along an S-shaped curve on the inner side of the strap all around.

7. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 1, wherein The lower surfaces of the end caps are all coated with end cap glue, and the end cap glue is used to connect the end caps to the filter element and the protective mesh.

8. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 1, characterized in that, An expander is filled between the inner and outer walls of the end cap and the filter element, and the expander located on the inner wall of the filter element abuts against the end cap.

9. The high-temperature resistant filter cartridge for high-frequency backwashing according to claim 1, wherein The protective mesh is a diamond mesh, and the parameters of the diamond mesh include a mesh thickness of 1.0 mm, a mesh hole size of 10×20 mm, and a wire diameter of 1.4 mm.

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