Talking about the performance of glass fiber filte

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Manufacturers talk about the performance of their glass fiber filter materials

the reasonable design of fiber multi-scale, multi-level and dust collector, combined with the precise layout of microchannels, can effectively improve the comprehensive dust removal performance of fiber filter materials, so as to quickly set the temperature of heating furnace

1 performance of common fiber filter materials

1) the needled felt made of asbestos fiber can withstand the high temperature of 350 ℃, but it is no longer used because of its carcinogenicity

2) metal fiber and high temperature resistant ceramic fiber as filter materials have superior performance, but the price is too expensive, and they are only used in special industries

3) glass fiber has unique properties, such as good strength, toughness and chemical corrosion resistance, stable chemical properties, no moisture absorption, no expansion, high temperature resistance of 260 ℃, good thermal stability, good filtration effect under high temperature conditions, and no risk of fire. Like graphite fiber and silicon fiber that have been used for many years, glass fiber has high friction when weaving, and it should be coated at the same time. Glass fiber does not burn, and will soften at 500 ℃ ~700 ℃ due to the existence of rebound stress. Its chemical stability is good

glass fibers with different diameters can be obtained by drawing glass fibers, which can effectively remove particles of different micron levels. Glass fiber can be made into fabric, cushion, felt, filter paper, membrane and other forms of filter materials. Each kind of filter material has high void ratio and large dust holding space. The mechanical, chemical and thermal properties of several commonly used fiber filter materials are shown in Table 1

2。 Selection of filter fabrics

woven fabric filter materials can be divided into three categories: monofilament fabrics, multifilament fabrics and staple yarn fabrics. Monofilament fabrics can be made of polyamide, polyester, polypropylene, polyvinyl chloride, polytetrafluoroethylene and Kevlar with a diameter of 0. 003 mm~3 mm monofilament made of filter material. The aperture of plain fabric filter material can be 5 μ m ~25 μ m; If you want to make the hole diameter less than 5 μ m. Twill fabric can be used; Because the nominal stress method does not consider the local plastic deformation of the dangerous part and the influence of different load sequences on the fatigue life, it can not be applied to the low cycle fatigue situation dominated by plastic deformation. Satin will make the microchannel opening narrow and long. Woven filament fabrics are mainly used for wet filtration. Multifilament fabric is compressible, so it can form a fabric with small aperture, which has a good interception effect on small particles. Multifilament plain and twill fabrics generally use thicker yarn to produce fabrics with strong endurance. Because the multifilament yarn has a larger contact surface with the dust layer, the dust removal effect is not as ideal as that of monofilament fabric. The filter material made of short fiber yarn fabric has a good interception effect on particles. The performance of polystyrene foam of yarn and fiber in fire cannot play a filtering role compared with the internal space. Generally, short fiber plain and twill fabrics adopt higher density. The biggest advantage of short fiber yarn fabric as filter material is its rough and hairy surface, which has a strong trapping effect on dust. The loose yarn structure can make the hairiness on the fiber surface form an effective retention effect on particles of different orders of magnitude, and the hairy surface is also conducive to improving the impermeability. Common filter materials include: MetaMax filter material, P84 (polyimide) filter needle felt, normal temperature filter needle felt, composite needle felt, glass fiber expanded yarn filter cloth, glass fiber woven fabric, glass fiber needle felt, etc

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