Metal-free filter element for nuclear industry multiplexing type high-efficiency air filter

Abstract

The utility model discloses a metal-free filter element for a nuclear industry multiplexing type high-efficiency air filter, which comprises a filter shell, the filter shell is of a frame-shaped structure, a metal-free filter element is fixed in the filter shell, the metal-free filter element comprises an outer coating part II arranged in the filter shell, and a metal-free filter element is arranged in the outer coating part II. The second outer wrapping part is of a U-shaped structure, the front surface of the second outer wrapping part adheres to the first outer wrapping part through sealant, and a filtering layer adheres to the position between a vertical plate of the second outer wrapping part and the first outer wrapping part through sealant. The fiber reinforced composite material or the engineering plastic is used as the outer coating material of the metal-free filter element of the reusable high-efficiency air filter in the nuclear industry, so that the whole metal-free filter element can be directly treated as non-metal waste, and stripping type disassembly according to the classification requirements of metal and non-metal waste is not needed; therefore, the reuse capacity of the reuse type high-efficiency filter is greatly improved, and a large amount of waste treatment cost of the nuclear industry is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration and purification, in particular to a metal-free filter element for a nuclear industry reusable high-efficiency air filter. Background Art

[0002] Air filters, especially high-efficiency air filters used in nuclear industry ventilation systems, constantly generate a large amount of radioactive solid waste due to frequent replacement. At present, to reduce the treatment cost of these solid wastes, the main treatment method is to design high-efficiency air filters as reusable types. Specifically, after disassembling the used filters, the shell parts of the filters are reused to reduce the output of metal wastes. For the technical solutions of reusable high-efficiency air filters, there are two technical directions promoted in China currently: 1. Disassembled reuse of the metal shell of the filter - This reusable filter is composed of multiple shell parts connected by fasteners and bonded and assembled with filter materials, sealants, etc. After use, the old filter is completely stripped and disassembled manually or by operating machinery on-site in the nuclear industry for the shell parts and sealants, and then the shell parts are cleaned and bonded and assembled with new filter materials using sealants. After passing the inspection after assembly, it is regarded as completing the reuse process. The advantage of this method is that the shell parts in the filter can be reused several times, and a certain amount of solid waste can be reduced after reuse. The disadvantage is that the reuse of the filter shell parts requires the cooperation of sufficient auxiliary equipment and the overall operation even needs to be carried out in the radiation control area of the nuclear industry site, with high overall treatment cost and low reuse production capacity. 2. Integral reuse of the metal shell of the filter - This reusable filter is assembled by fastening two independent modules, namely an integral shell and an internal filter element. After use, the old filter is disassembled and separated manually or by operating machinery on-site in the nuclear industry for the shell and the filter element, and then the integral shell is tightly connected and assembled with a new filter element. After passing the inspection after assembly, it is regarded as completing the reuse process. The advantage of this method is that the installation and disassembly are simple when the integral shell of the filter is reused, and a certain amount of solid waste can be reduced after reuse. The disadvantage is that the covering material of the filter element module uses a soft metal wire mesh, which can be directly compressed, but does not fully meet the strict requirements of the classification treatment of nuclear industry metals and non-metals. By comprehensively comparing the above two technical directions of reusable high-efficiency filters, it can be judged that the method of integral reuse of the metal shell is more practical, economical, and safe. Moreover, by optimizing the structure and materials of the current filter element module, the solution of domestic nuclear industry reusable high-efficiency air filters can be extended to a wider range of nuclear field application scenarios. Content of the Utility Model

[0003] The technical problem to be solved by the present utility model is to overcome the existing defects, and provide a metal-free filter element for a nuclear industry reusable high-efficiency air filter, which has a simple structure, is installed more quickly, and has high production efficiency. By using fiber-reinforced composite materials or engineering plastics as the outer covering material of the metal-free filter element for the nuclear industry reusable high-efficiency air filter, the metal-free filter element as a whole can be directly treated as non-metallic waste, without the need for stripping and disassembling according to the classification requirements of metal and non-metallic waste. This greatly improves the reuse production capacity of the reusable filter and saves a large amount of nuclear industry waste treatment costs, and can effectively solve the problems in the background technology.

[0004] To achieve the above purpose, the present utility model provides the following technical solutions: A metal-free filter element for a nuclear industry reusable high-efficiency air filter, including a filter housing, the filter housing is a frame-like structure, and a metal-free filter element is fixed inside the filter housing. The metal-free filter element includes an outer covering part two arranged inside the filter housing, the outer covering part two is a U-shaped structure, the front surface of the outer covering part two is adhesively connected with an outer covering part one through a sealant, and a filter layer is adhesively connected between the vertical plates of the outer covering part two and the outer covering part one through a sealant. Vertical ventilation holes are uniformly arranged on the vertical plates of the outer covering part two and the outer covering part one, and the left and right sides of the outer covering part one are uniformly fixedly connected with the filter housing through fasteners.

[0005] Further, the cross-section of the filter layer is a V-shaped reciprocating structure, and the front and rear edges of the filter layer are adhesively connected with the outer covering part two and the outer covering part one through a sealant respectively. Each vertical ventilation hole is located at the center of the V-shape of the filter layer. The air to be filtered enters between the filter layer and the outer covering part two through the vertical ventilation holes on the outer covering part one, and then the air passes through the filter layer to filter the gas, and the filtered gas is exported through the vertical ventilation holes on the outer covering part two, so as to filter the air.

[0006] Further, a gasket is adhesively connected to the edge of the front surface of the outer covering part one through a sealant. The outer covering part two and the outer covering part one are formed by processing fiber-reinforced composite materials or engineering plastics, and the gasket makes the sealing effect better when the filter is installed.

[0007] Further, a handle is fixed to one side of the filter housing through a screw, and the handle makes it more convenient to take out the filter.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: The handle makes it more convenient to take out the filter, and the gasket makes the sealing effect better when the filter is installed. The air to be filtered enters between the filter layer and the second outer covering member through the vertical ventilation holes on the first outer covering member, and then the air is filtered by the filter layer. The filtered air is discharged through the vertical ventilation holes on the second outer covering member, so as to filter the air. The metal-free filter element of the nuclear industry reusable high-efficiency air filter has a simple structure, is installed more quickly, and has high production efficiency. Using fiber-reinforced composite materials or engineering plastics as the outer covering materials of the metal-free filter element of the nuclear industry reusable high-efficiency air filter can enable the entire metal-free filter element to be directly treated as non-metallic waste, without the need for stripping disassembly according to the classification requirements of metal and non-metallic waste. This greatly improves the reuse production capacity of the reusable high-efficiency filter and saves a large amount of nuclear industry waste treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the present utility model;

[0010] Figure 2 is a schematic structural diagram of the metal-free filter element of the present utility model before installation;

[0011] Figure 3 is a schematic exploded view of the metal-free filter element of the present utility model.

[0012] In the figure: 1 first outer covering member, 2 second outer covering member, 3 filter layer, 4 gasket, 5 handle, 6 filter housing, 7 fastener. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0014] Please refer to Figures 1-3, the present utility model provides a technical solution: a metal-free filter element for a nuclear industry reusable high-efficiency air filter, including a filter housing 6. The filter housing 6 is a frame-like structure. A metal-free filter element is fixed inside the filter housing 6. The metal-free filter element includes an outer covering part two 2 arranged inside the filter housing 6. The outer covering part two 2 is a U-shaped structure. The front surface of the outer covering part two 2 is adhesively connected with an outer covering part one 1 through a sealant. A filter layer 3 is adhesively connected between the vertical plate of the outer covering part two 2 and the outer covering part one 1 through a sealant. Vertical ventilation holes are evenly arranged on the vertical plates of the outer covering part two 2 and the outer covering part one 1. The left and right sides of the outer covering part one 1 are evenly fixedly connected with the filter housing 6 through fasteners 7. The cross-section of the filter layer 3 is a V-shaped reciprocating structure, and the front and rear edges of the filter layer 3 are adhesively connected with the outer covering part two 2 and the outer covering part one 1 respectively through a sealant. Each vertical ventilation hole is located at the center of the V shape of the filter layer 3. The number of vertical ventilation holes in the outer covering part one 1 and the corresponding V-shaped reciprocating number of the filter layer 3 are designed to be 3 to 8. The air to be filtered enters between the filter layer 3 and the outer covering part two 2 through the vertical ventilation holes on the outer covering part one 1, and then the air passes through the filter layer 3 to filter the gas. The filtered gas is discharged through the vertical ventilation holes on the outer covering part two 2, thereby filtering the air. A sealing gasket 4 is adhesively connected to the edge of the front surface of the outer covering part one 1 through a sealant. The outer covering part two 2 and the outer covering part one 1 are formed by processing fiber-reinforced composite materials or engineering plastics. One side of the filter housing 6 is provided with a screw or rivet handle 5. The fiber-reinforced composite materials mainly include: carbon fiber, aramid fiber, glass fiber, etc.; the engineering plastics mainly include: polycarbonate, polyamide, polyoxymethylene, polyphenylene ether, polyester, polyphenylene sulfide, polyaryl ester, etc.

[0015] During use: The handle 5 makes it more convenient to take out the filter. The sealing gasket 4 makes the sealing effect better when the filter is installed. The air to be filtered enters between the filter layer 3 and the outer covering part two 2 through the vertical ventilation holes on the outer covering part one 1, and then the air passes through the filter layer 3 to filter the gas. The filtered gas is discharged through the vertical ventilation holes on the outer covering part two 2, thereby filtering the air. This metal-free filter element for a nuclear industry reusable high-efficiency air filter has a simple structure, is installed more quickly, and has a high reuse production efficiency. By using fiber-reinforced composite materials or engineering plastics as the outer covering materials of the metal-free filter element for a nuclear industry reusable high-efficiency air filter, it can be directly treated as non-metallic waste as a whole, without the need for stripping and disassembling according to the classification requirements of metal and non-metal waste. This greatly improves the reuse production capacity of the reusable high-efficiency filter and saves a large amount of nuclear industry waste treatment costs.

[0016] Although embodiments of the present utility model 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 principle and spirit of the present utility model.

Claims

1. A metal-free filter element for a nuclear industry multiplex high-efficiency air filter, comprising a filter housing (6), wherein the filter housing (6) is a frame-like structure, and is characterized in that: A metal-free filter element is fixed inside the filter housing (6), and the metal-free filter element comprises an outer covering part 2 (2) arranged inside the filter housing (6), the outer covering part 2 (2) being a U-shaped structure, the front surface of the outer covering part 2 (2) being bonded to the outer covering part 1 (1) by means of a sealant, a filter layer (3) being bonded between a vertical plate of the outer covering part 2 (2) and the outer covering part 1 (1) by means of a sealant, the vertical plate of the outer covering part 2 (2) and the outer covering part 1 (1) both being provided with vertical ventilation holes, and the left and right sides of the outer covering part 1 (1) being fixedly connected to the filter housing (6) by means of fasteners (7).

2. The metal-free filter element for nuclear industry multiplex high efficiency air filter according to claim 1, characterized in that: The cross section of the filter layer (3) is a V-shaped reciprocating structure, and the front and rear edges of the filter layer (3) are respectively bonded to the outer covering member 2 (2) and the outer covering member 1 (1) by means of sealant, each vertical ventilation hole is located at the center of the V-shape of the filter layer (3), and the number of vertical ventilation holes of the outer covering member 1 (1) and the number of V-shaped reciprocating holes corresponding to the filter layer (3) are designed to be 3 to 8.

3. The metal-free filter element for nuclear industry multiplex high efficiency air filter according to claim 1, characterized in that: A sealing pad (4) is bonded to the front surface edge of the outer covering part 1 (1) by means of a sealing adhesive, and the outer covering part 2 (2) and the outer covering part 1 (1) are formed by processing of fiber-reinforced composite materials or engineering plastics.

4. The metal-free filter element for nuclear industry multiplex high efficiency air filter according to claim 1, characterized in that: A handle (5) is fixed to one side of the filter housing (6) by means of screws or rivets.

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