1. A variety of flue gas of industrial furnaces, dryers, etc. are all high temperature flue gas, most of which also contains a lot of water and sulfur oxide gases are. Baghouse is currently capable of handling flue gas temperature below 300 ℃, the temperature exceeds the pre-cooling process to deal with the flue gas, in exceptional circumstances, a metal fiber filter direct handling hot flue gas of 450 ~ 550 ℃. Processing high-temperature furnace flue gas steam boilers, cement kilns, metallurgical furnaces, incinerators, and other bag filters used at home and abroad increasingly common. Although the temperature baghouse by its filter performance limitations, but by appropriate treatment system of flue gas, has been able to handle temperatures up to 1200 ~ 1400 ℃ high temperature flue gas. 2, adhesion of dust Adhesion of dust in the bag surface compaction easy, baghouse dust adhesion can be handled by adsorption, by incorporating an appropriate amount of porous powder in the pipe system, the use of powder to adsorption the adhesion of dust, followed by purification by a bag filter. Fire-resistant plants such as dolomite powder Bitumen Gas adsorption purification, aluminum with alumina adsorption asphalt and hydrogen peroxide, the road company of asphalt concrete plant with limestone powder adsorption of bitumen fume, the adsorption efficiency of up to 92 to 99%. 3, explosive dust It will explode when an explosive dust must have the following three conditions: ⑴ combustible material in appropriate concentrations in the flue gas; ⑵ there is sufficient oxygen and oxidants; ⑶ have a source of ignition. Therefore, measures destructive of these three conditions or a condition occurring when purifying these gases taken. It simply is to control ingredients, eliminate fire; eliminate static electricity, equipment grounding; monitoring of explosion, fire venting. 4, corrosive gases In the flue gas purification system, having a corrosive effect on the baghouse dust and gas are mainly two kinds of media, such as coal, heavy oil fuel sulfurous acid gas molecules due to the presence of sulfur is formed, or water will produce a variety of salt class dust. Since the flue gas cleaning corrosion phenomenon occurred in the case of acid present in the flue gas temperature below the dew point, for which should ensure that the system is running in the flue gas temperature above the dew point. In the filter selection, corrosive substances shall flue gas characteristics, using the appropriate filter media, serious and require high corrosion purification systems, such as pharmaceutical, food, carbon black production and other industries, baghouse important member should be made of stainless steel or brushing anticorrosive paint handling. 5, grinding dust pecking In dealing with alumina, silica sinter pecking, such as grinding dust, as dust and coarse particles in the airflow velocity is too high in the bag filter, dust bag and led to a strong housing wear for this , the general should be taken to reduce the absolute number of coarse particles in the flue gas dust and reduce the dusty gas flow rate of two aspects of the appropriate measures, such as flue gas before entering the baghouse dust removal device pre-set, and strictly control the bag inlet velocity , easy to wear at the inlet airflow plus wear-resistant materials.
