国民逐渐提高了环保除尘的要求， 工业除尘器的研发技术也越来越成熟,同时应用范围越来越广泛。 Now with the development of industrialization , the people have gradually increased the requirements for environmental protection and dust removal, and the research and development technology of industrial dust collectors has become more and more mature , and at the same time, the application range has become more and more extensive. At present, bag dust collectors are used to deal with corrosive flue gas, high temperature humid hot flue gas, and easy to adhere dust, but the ultrafine dust contained in flue gas can also be filtered, which fully meets the requirements for environmental protection .
当工业生产中用到工业窑炉、干燥机等的烟气都属于高温烟气，其中大多还含有大量水份和硫的氧化物气体。 1. When the industrial kiln, dryer and other flue gas used in industrial production are high temperature flue gas, most of them also contain a large amount of moisture and sulfur oxide gas. ℃以下的烟气，超过这个温度则应对烟气进行预冷却处理，在特殊情况下，可使用金属纤维滤料直接处理450 ～ 550 ℃的高温烟气。 Bag dust collectors can currently handle flue gas at temperatures below 300 ° C. Above this temperature, the flue gas should be pre-cooled. In special cases, metal fiber filters can be used to directly treat high temperature flue gas at 450 to 550 ° C. It is becoming more and more common at home and abroad to use bag-type dust collectors to treat the smoke of high-temperature furnaces such as steam boilers, cement kilns, metallurgical furnaces, and incinerators. ～ 1400 ℃的高温烟气。 Although the bag filter is limited by the temperature resistance of its filter material, through proper treatment of the system flue gas, it can already handle high temperature flue gas with a temperature of 1200 to 1400 ℃.
2. When the bag type dust collector has a corrosive effect, there are mainly two kinds of media: gas and dust, such as sulfuric acid gas formed by the presence of sulfur molecules in coal and heavy oil fuels, or various salt dusts when it encounters water. . Since the corrosion phenomenon in flue gas purification occurs when the flue gas temperature is below the acid dew point, it is necessary to ensure that the system flue gas is operated above the dew point temperature. In the selection of filter materials, according to the characteristics of the corrosive substances generated by the flue gas, the corresponding filter materials are used. For purification systems with severe corrosion and high requirements, such as pharmaceutical, food, and carbon black production, the importance of bag dust collectors is important. It is also appropriate that the parts should be made of stainless steel or treated with anti-corrosive paint.