What factors should be considered when choosing industrial purification filter bags?
When choosing an industrial purification filter bag, it is necessary to comprehensively consider the filtration accuracy, material, size, flow rate and other factors to ensure that it can meet the purification needs in industrial production. The following is a detailed introduction:
Filtration accuracy: This is one of the key factors in selecting filter bags. Different industrial applications have different requirements for filtration accuracy. For example, the electronic industry usually needs a filtration accuracy of 0.1 micron or higher to remove ultra-fine particles and prevent pollution to precision electronic components; However, some common liquid filtration in the chemical industry may meet the requirements with a filtration accuracy of 1-5 microns.
Material: the material of the filter bag should be selected according to the nature of the filter medium. Common materials are polypropylene, polyester and nylon. Polypropylene filter bag has good chemical resistance and low cost, and is suitable for general acid-base solution filtration. The polyester filter bag has high strength and wear resistance, and is often used to filter liquids or gases containing fine particles. The nylon filter bag has good flexibility and water resistance, and is suitable for filtering some high-viscosity liquids. If the filtered medium is highly corrosive, special corrosion-resistant materials, such as PTFE, need to be selected.
Size: the size of the filter bag should match the filtering equipment. The diameter, length and opening mode of the filter bag should be considered. If the size of the filter bag is too large or too small, it can't be installed in the filtering equipment correctly, which will affect the filtering effect. In addition, it is necessary to select the appropriate number and arrangement of filter bags according to the processing capacity and space requirements of the filter system.
Flow rate: Select the appropriate filter bag according to the flow rate of fluid to be treated in industrial production. The system with large flow rate needs to choose a filter bag with large flux and low resistance to ensure good filtration effect without affecting production efficiency. Generally speaking, the flow parameters of the filter bag will be given in the product manual and can be selected according to the actual flow demand.
Temperature resistance: If high temperature medium is involved in the filtration process, it is necessary to choose a filter bag with good temperature resistance. For example, in the high-temperature flue gas filtration of iron and steel metallurgy industry, it is necessary to use filter bag materials that can withstand high temperatures of several hundred degrees, such as glass fiber. Otherwise, the filter bag may be deformed and damaged at high temperature, which will affect the filtering effect and service life.
Price and cost: On the premise of meeting the requirements of filtration performance, price and cost are also factors to be considered. The prices of different materials and brands of filter bags vary greatly, so it is necessary to comprehensively consider the purchase cost, replacement cost and operation cost. For example, some high-performance but expensive filter bags may have better cost performance in long-term operation, because they have long service life and good filtering effect, which can reduce the cost caused by frequent replacement of filter bags and production interruption.
Brand and quality: choosing well-known brands and reliable quality filter bags can ensure the performance and stability of products. High-quality filter bags are better guaranteed in terms of material quality, processing technology and filtering effect, which can reduce production accidents and losses caused by filter bag failures. You can refer to other users' evaluations and cases to choose brands and products with good reputation.
