Fiberglass Fabric has outstanding advantages such as high temperature resistance, corrosion resistance, dimensional stability, high dust removal efficiency, and low dust stripping properties, so it is a relatively commonly used high temperature filter material.
Let's take a look at several common glass fiber materials.
1) Woven glass fiber filter material
The performance of the glass fiber fabric filter material varies with the type of yarn, fiber diameter, twist, density and fabric structure, and the performance and life of the filter material are also different. The influence of fabric structure on filter performance is as follows. ①Abrasion resistance: plain weave>twill>forged texture. ②Softness: forged pattern>twill pattern>plain pattern. ③Porosity: forged pattern>twill pattern>plain pattern. Plain weave fabric has many intersection points and poor air permeability, so it is generally not suitable as a gas filter material; forged weaves have better comprehensive performance, while improving the smoothness of the fabric, which is conducive to dust peeling; twill weaving is convenient, economical and moderate in performance. Therefore, forged and twill weave structures are generally used. In order to improve the ability of the weft yarn to withstand bending, a double weft structure has emerged to increase its service life. The thickness and fiber diameter of the factors affecting the bending performance of the filter media. Generally speaking, the thicker the cloth, the better the flexural and abrasion resistance. As far as the single fiber is concerned, the smaller the diameter, the smaller the bending diameter, that is to say, the more it can withstand strong bending. The single fiber diameter of glass fiber in my country is 6-8μm. In each process of the filter cloth weaving, maintaining the uniformity of tension not only makes the surface of the filter cloth flat, but also has an important price for the length and strength of the filter cloth. It is also an important guarantee for the stability of the filter cloth's air permeability.
The texturized fiberglass yarn is made by the puffing process to make the glass fiber soft, swollen and slightly three-dimensional, so that the glass fiber cloth has the double advantages of the lightness of long fibers and the bulkiness of short fibers. In addition to high temperature resistance and corrosion resistance, the filter cloth also has the advantages of good air permeability and high purification efficiency.
The fiberglass needle mat is a new type of high temperature filter material with reasonable structure and excellent performance. It not only has the advantages of high temperature resistance, corrosion resistance, dimensional stability, small elongation and shrinkage, and high strength of glass fiber fabric. In addition, the felt layer has a single fiber (fiber diameter less than 6μm) three-dimensional microporous structure, high porosity (height 80%), and low resistance to gas filtration. It is a high-speed, high-efficiency high-temperature pulse filter material. The filter cloth is suitable for high-temperature flue gas filtration in industrial furnaces such as chemical industry, steel, metallurgy, carbon black, cement, and garbage incineration.