Polyester filter bags are used to treat air pollution and material recovery, and are suitable for operation at temperatures between 125 C and 140 C. The polyester needle-punched filter felt is a layered composite product of a textile woven fabric and a nonwoven needle-punched nonwoven fabric.
In the middle layer of the filter material, there is a woven base fabric layer which acts as a reinforcing steel frame to increase the strength. On the surface of the base fabric with a small tightness, the fiber-woven woven layer is laminated. The product has a three-dimensional structure, and its total opening ratio can reach more than 80%. The surface of the needle-punched cloth is arranged in a single fiber layer, and the number of cloth faces is large, the aperture is small, and the distribution is uniform, and the dust collection effect is good. Therefore, the needle felt has the advantages of high dust-pumping efficiency, good air permeability, low resistance and high air volume capacity.
Polyester (polyester) fiber filter material is used for temperatures from 125 C to 140 C. The polyester has excellent electrical insulation, good wear resistance, high strength and good elastic recovery performance, and the strength loss at 170 C can be recovered in a short time, and the thermal stability is good.
Polyester has poor hygroscopic properties and is easily hydrolyzed. It is more easily eroded under the conditions of containing sulfuric acid, nitric acid and carbonic acid. It is stable to low concentration of inorganic acid under low temperature conditions, but it is soluble in concentrated sulfuric acid and heated formic acid. It is stable to general organic solvents, has good resistance to weak bases, and is generally resistant to strong alkalis.
Expanded glass fiber filter cloth weft yarn, referred to as glass fiber filter cloth, consists of puffed yarn. This product is mainly used for high-temperature atmospheric dust reduction and recovery of valuable industrial dust.
Because the yarn is fluffy, the covering ability is strong, and the gas permeability is good, the filtration efficiency can be improved, the filtration resistance can be reduced, and the dust removal efficiency can reach 99.5% or more. The product is mainly used for high-temperature atmospheric dust reduction and recovery of valuable industrial dust. For example, cement, carbon black, steel, metallurgy, electric power generation and coal-fired furnaces and other industries.
There are many varieties of glass fiber, including continuous fiber, fixed length yarn, and bulked yarn. They can be individually or mixed into filter cloths, and in recent years there have been fiberglass needle felts. In terms of filtration performance, continuous glass fiber permeability is similar to cotton yarn. The fixed length fiber yarn has good bulk and air permeability and good dust collection efficiency. The glass fiber bulked yarn is formed by the continuous glass fiber being blown by compressed air, so that the fibril is shortened and wound into a roll, which is bulky and bulky, and the volume is doubled, and the strength is obviously reduced.
According to the comparison of the filtration performance of various fabric structures of the glass fiber expanded yarn, it is preferable to retain the warp continuous fibers. Its cost is low, the glass fiber needle felt uses a thicker base fabric, and then is coated with ultra-fine short fibers. The fibers are pierced into the bottom with hundreds of needles to form a three-dimensional structure, which increases the airflow path and prevents dust. to raise efficiency. The surface of the filter cloth is heat treated to evenly flatten the surface, eliminating large pores, reducing the penetration and penetration of fine dust, thereby increasing the filtration speed.
The P84 filter bag is a high-efficiency and low-resistance filter material which is mainly made of glass fiber and compounded with P84 fiber to form a three-dimensional microporous structure. After special surface chemical treatment and finishing technology, the product is resistant to acid and alkali corrosion, wear and tear, and it is resistant to water and oil, easy to clean and so on. The peeling strength is >40N, which can bear high air volume and high concentration dust collection efficiency.
The characteristics of the P84 composite high temperature resistant filter bag is significant due to the fineness of the fiber itself. The irregular fiber cross section increases the fiber surface area to the maximum and provides many tiny pores to make the surface filtration better than the depth filtration. The dust only stays on the surface of the filter mat and cannot penetrate into the filter mat. Therefore, the backwashing pressure is small and the filter cake bombing efficiency is remarkably improved, and the fine fine particle collecting efficiency is excellent and the working pressure difference is small.
Scope of application:
Applicable to coal-fired boilers, liquid bed boilers, waste incineration, asphalt plants, cement plants, waste incinerators, thermal power plants, etc.
P84 has the following characteristics
1. the use of the continuous temperature up to 260 degrees, the instantaneous temperature can reach 280 degrees;
2. It has good acid resistance, alkali resistance;
3. Hydrolytic stability is significantly better than NOMEX fiber.
Our meta-aramid fabrics have excellent high temperature resistance, good dimensional stability, excellent spinnability, fire resistance and corrosion resistance. It can be widely used in steel, cement, power plants, chemicals, asphalt and other industries.
The meta-aramid with good mechanical properties is a flexible polymer with higher breaking strength than ordinary polyester, cotton and nylon. It has a large elongation, soft handfeel and good spinnability. It can produce short fibers and filaments of different denier and length. It is woven into fabrics and non-woven fabrics in different textile machinery. To meet the requirements of protective clothing in different fields.
It has excellent flame retardant and heat resistance. The meta-aramid has a limiting oxygen index (LOI) of more than 28, so it does not continue to burn when it leaves the flame. The flame retardant properties of meta-aramid are determined by its own chemical structure and are therefore a permanent flame retardant fiber that does not reduce or lose flame retardancy due to time of use and washing. The meta-aramid has good thermal stability and can be used continuously at 205 �° C. It can maintain high strength even at temperatures above 205 �° C. The meta-aramid has a high decomposition temperature and does not melt or melt under high temperature conditions, and carbonization starts when the temperature is higher than 370 �°C. It has stable chemical properties.
The meta-aramid has excellent resistance to most chemicals, and is resistant to most high-concentration inorganic acids, and has good alkali resistance at room temperature. The meta-aramid has excellent radiation resistance. For example, under the long-term illumination of ultraviolet rays and gamma rays, the intensity remains unchanged. The interfacial aramid has excellent anti-friction and chemical resistance. After 100 times of washing, the torn strength of the fabric treated with meta-aramid can still reach more than 85% of the original strength.
