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Summary of filter material knowledge of dust remover

Article source: this site Author: admin popularity: second Time: September 11, 2020 11:17【 large in Small

a duster Summary of filter material knowledge

Filter material is one of the main components of bag filter. The performance of bag filter depends on the performance of filter material to a great extent. Cartridge filter The dust collector is composed of filter element or pulse injection. The filter can be installed on the side and installed separately. According to the material of the filter cartridge, the filter cartridge dust remover can be divided into long fiber polyester filter cartridge dust collector, composite fiber cartridge dust collector, anti-static cartridge dust collector, flame retardant cartridge dust collector, membrane filter cartridge dust collector, nano cartridge dust collector, etc. A device that separates dust from flue gas. The performance of the dust remover is expressed by the amount of gas that can be treated, the resistance loss of gas passing through the dust collector and the dust removal efficiency. The performance of filter media mainly refers to filtration efficiency, permeability and strength, which are related to the material and structure of the filter material. A device that separates dust from flue gas. The performance of the dust remover is expressed by the amount of gas that can be treated, the resistance loss of gas passing through the dust collector and the dust removal efficiency. According to the dust removal principle and dust characteristics of bag filter, the following requirements are put forward for filter materials.

(1) The dust holding capacity is large, and a certain permanent dust holding capacity can be retained after dust removal, so as to maintain a high filtration technical efficiency;

(2) In the dust permeability, pressure loss of uniform state;

Wrinkle resistance, wear resistance, temperature resistance, corrosion resistance, high mechanical strength;

(4) Moisture absorption is small, easy to clean ash;

(5) The utility model has the advantages of long service life and low cost.

Some of these requirements depend on the physical and chemical properties of the fiber and some on the structure of the filter material. It is difficult for general filter media to meet all the requirements at the same time, so the appropriate filter material should be selected according to the specific use conditions.

There are many kinds of filter materials used in bag filter, including natural plant fiber, inorganic nano fiber, synthetic fiber and so on. In recent years, with the development of synthetic fiber industry in our country, we have been learning to develop new filter materials with low cost and durability. In terms of fibrous tissue, there are long fiber and short fiber as two kinds. Long fibers form less fluff on the surface of the fabric, and the dust layer pressure loss is high, but it is easy to remove dust; generally, the surface of short fiber fabric has fluff, which has good dust filtering performance and low pressure loss, but it is slightly difficult to clean dust. According to the structure of filter materials, there are filter cloth (plain cloth and pile cloth) and felt. According to the weaving method of filter cloth, there are plain cloth, twill cloth and satin cloth. Among them, the comprehensive technical performance of twill cloth can be better, the filtration efficiency and ash removal effect can meet the design requirements, the softness is good, the air permeability is better than plain cloth, but the strength is slightly worse than plain cloth.

1. Natural fiber filter material

(1) Cotton cloth is the lowest price, usually used less than 80 ℃, when the high temperature strength drops sharply, acid resistance is poor, and the dust filtering efficiency is not 10 μ m, it is generally used less.

Wool filter cloth is usually made of wool. It is thicker than cotton cloth and the fiber is more than cotton cloth. It has the advantages of good air permeability, small resistance, large dust removal capacity, high filtration efficiency, easy ash removal and good acid and alkali resistance. However, it can only be used below 90 ° C and its price is much higher than that of cotton cloth or synthetic fiber filter cloth.

(3) Silk fabric (silk flat) surface smoothness, easy to clean, good air permeability, but small amount of dust, low filtering speed, large aging.

2. Inorganic fiber filter material

Mainly refers to through the glass and fiber filter cloth, has the filtration technology performance is good, the resistance is small, the chemical structure stability is good, the high temperature resistance, does not absorb moisture and the price is relatively cheap and so on. Medium alkali glass fiber cylindrical filter cloth is widely used in the production of cement, smelting, carbon black and pesticide industries. The filtration efficiency of glass as fiber filter cloth is significantly lower than that of natural and synthetic nanofiber filter media in China. Glass fiber is not wear-resistant, not bending, easy to break. In order to improve its properties, aromatic organosilicon, polytetrafluoroethylene and graphite can be used for analysis and treatment. After treatment, it can improve the wear resistance, hydrophobicity, acid resistance and softness of our country, and the surface is smooth and easy to remove ash, thus prolonging the service life of enterprises.