The cloth dust collector bags used in the operation process will be more or less broken, and the dust particles in the dust-containing exhaust gas will be overflowed in the dust filter. How to judge the quality of the cloth dust collector bags? Of course, it is easy to find on the bag breakage detection instrument, but we are here to suggest that you choose high quality dust bag before operation of the bag filter, and do well in the maintenance of the bag, then how to choose the dust bag correctly and how to do the maintenance have quite big importance for improving the service life of the dust bag.
Let's talk about the precautions in the selection of cloth dust collector bags, so as to select a good dust bag. So when choosing, you have to start with the selection of cloth bag filter material.
The so-called selection of filter material depends on whether its performance meets the needs of dust reduction and emission, whether it can meet long-term dust removal, whether it can adapt to high-temperature gases in filtering industrial gases, whether it can collect flammable and explosive dust particles,and how is the dust effect. Generally speaking, its specifications are selected according to the requirements of the working conditions.
In fact, the judgment methods for specifications and materials are mostly the same. There are many types of dust collector filter bags. It is necessary to determine the type of dust collector bag, and then calculate the required model of dust collector filter bag according to the working conditions given by the customer.
According to the major categories, there are three major categories, namely, high temperature dust collector bags, medium-temperature dust collector bags, and room-temperature dust collector bags. Each of these major categories of dust cloth bags contains many subcategories.
The cloth dust collector bags are made of cloth or felt woven from synthetic fibers, natural fibers or glass fibers. Sew the cloth or felt into a cylindrical or flat filter bag as needed. According to the nature of the flue gas, the filter material suitable for the application conditions is selected. Generally, when the flue gas temperature is lower than 120℃ and the filter material is required to have acid resistance and durability, polyester flannel and polyester needle felt are often used; when dealing with high temperature flue gas (<250℃), graphitization is mainly used glass cloth; In some special cases, carbon fiber filter materials are used. It is very important to control the speed of the flue gas passing through the filter material (referred to as the filtration speed) during the operation of the bag filter. Generally, the filtration speed is 0.5-2m/min, and the efficiency for particles larger than 0.1um can reach more than 99%, and the resistance loss of the equipment is about 980-1470Pa.
Filter bags are generally used in flue gas treatment and dust removal systems in ironworks, steelworks, ferroalloy plants, refractory plants, foundries, power plants, waste incinerators, coal-fired boilers, fluidized bed boilers and other flue gas filtration, asphalt concrete mixing, building materials, cement ceramics, lime, gypsum and other production sites, smelting flue gas filtration of aluminum electrolysis, lead, tin, zinc, copper and other rare metals, recovery of fine materials, separation of liquid and solid, liquid-solid separation and fine material recovery in the fields of chemicals, coke, carbon black, dyes, pharmaceuticals, plastics, dust treatment and purification collection in mining, grain processing, flour, electronics industry, wood processing, etc.