Filter cloth is a filter medium woven from natural fibers or synthetic fibers. Commonly used materials include cotton, hemp, wool, cocoon silk, asbestos fiber, glass fiber and certain synthetic fibers. For example, cotton canvas, twill and woolen cloth. In a broad sense, filter cloth also includes metal mesh or filter mesh.
Filter cloth synthetic fibers mainly include polypropylene, polyester, nylon, vinylon, etc. Among them, polyester and polypropylene are the most commonly used, mainly for solid-liquid separation, while nylon is widely used in coal washing plants because of its excellent wear resistance.
The new high-efficiency filter cloth is mainly used for air filtration and dust removal, dust collection powder to purify the air and protect the environment. It is widely used in smelters, chemical plants, sugar, dyes, medicine, food and other industries.
Filter fabrics and screens made of polyester, polypropylene, nylon, vinylon, cotton and other materials are widely used in the pharmaceutical, chemical, dye, steel, construction, iron, chemical, ceramic, cement, geological, and mineral industries.
Special filter cloths include aramid, PTFE, PVDF, etc., with high operating temperature.
Filter cloth plays an important role in flue gas treatment and dust removal systems in ironworks, steelworks, ferroalloy plants, refractory plants, foundries, power plants, etc. Waste incinerator, coal-fired boiler, fluidized bed boiler and other flue gas filtration. Asphalt concrete mixing, building materials, cement ceramics, lime, plaster and other production sites. Smelting flue gas filtration of aluminum electrolysis, lead, tin, zinc, copper and other rare metals, recycling of fine materials, separation of liquid and solid. Liquid-solid separation and fine material recovery in chemical, coke, carbon black, dye, pharmaceutical, plastic and other fields. Dust treatment and purification collection in mining, grain processing, flour, electronics industry, wood processing, etc.
Advantages and disadvantages: close to zero emissions, can meet the most stringent environmental protection standards.
Good dust removal, can provide higher ventilation, or can reduce the pressure difference.
The life of the filter bag is prolonged, the number of cleanings is reduced, and the equipment maintenance cost is reduced.
With higher air-to-cloth ratio, smaller dust collectors can be designed to reduce energy consumption when the pressure difference is reduced.
Dust removal cloth bags can be roughly divided into three categories in terms of temperature. Normal temperature types such as polyester needled felt cloth bags, anti-static dust removal cloth bags, easy-to-clean dust removal cloth bags, etc., medium temperature types such as polyester coated needled felt cloth bags, three-proof dust removal cloth bags, and water-repellent Oil needle felt, high temperature products such as Metas dust bag, flumesi cloth bag, glass fiber needle felt filter bag, PPS acid and alkali resistant cloth bag, etc. The choice of dust bag should be based on air
The temperature, humidity and chemical characteristics of the body; the size, weight, shape, dust concentration and filtration speed of the particulate matter, the cleaning method, the emission concentration and the working system of the bag filter.
Under normal circumstances, the pulse jet bag type dust collector chooses needle felt, and the sub-chamber blowback bag filter or mechanical vibration bag filter chooses woven cloth. If the working condition is high temperature, it needs to be acid and alkali resistant and humid. You can choose high-temperature products, such as coated fluomex, etc.There are many factors to consider when choosing a dust bag.
1. According to the cross-sectional shape of the dust filter bag, it is divided into flat bags (trapezoid and flat) and round bags (cylindrical).
2. According to the way of air inlet and outlet, it is divided into: lower air inlet and upper air outlet and upper air inlet and lower air outlet and direct current type (only limited to plate-shaped flat bag).
3. According to the filtration method of the dust filter bag, it is divided into: external filtration and internal filtration.
4. According to the temperature tolerance of the dust filter bag, it can be divided into high temperature type, medium temperature type and normal temperature type.
5. Application areas Application areas: ironworks, steelworks, ferroalloy plants, refractory plants, foundries, power plants, cement plants, chemical plants, grain processing plants, carbon black plants, aluminum plants, etc.
