(1) mechanical vibration bag filter class is the use of mechanical devices (including manual, electromagnetic vibration and pneumatic) of the bag to produce vibration cleaning bag filter. Such dust is characterized by kinetic energy applied to the layer of dust and less frequently, thus requiring filter thin and smooth, soft texture, is conducive to the transmission of vibration crossing, rapping a sufficient force on the filter area. Should be selected by the synthetic satin or twill weave, thickness 0.3 ~ 0.7mm, mass per unit area of 300 ~ 350g / m. Filtration rate 0.6 ~ 1.0m / min; for small unit can be increased to 1.0 ~ 1.5m / min. (2) sub-room cleaning bag filter compartment class structure, the use of the valve chamber by switching to form the reverse flow cleaning, or bulging of the bag deflated bag filter cleaning. It has two state and three-state points, the number of cleaning 3 to 5 times / h, cleaning power for their own use from the pressure filter body, the special anti-hair market in Taichung to reprovision power; a low kinetic energy cleaning type. Media should use texture, light, soft, easily deformed and dimensionally stable thin filter, such as 729, MP922 filter. Class precipitator filtration rate and relatively dust mechanical vibration class. Sub-room cleaning bag filter class has an inner filter and the outer filter of the points, there is no difference in the filter selection. For medium-sized conventional circular filter bag, no dust skeleton; bag aspect ratio (15 to 40): 1; preferred satin (or twill) woven filter; special occasions can also be used in fabric strengthen thin needle felt filter, 1.0 ~ 1.5mm thick mass per unit area 300 ~ 400g / m. For small dust common flat bag, bag or honeycomb-shaped diamond bag, dust skeleton must be braced, preferred abrasion resistance, good permeability thin needle felt filter mass per unit area of 350 ~ 400g / m. It can also be used a double or double weft fabric filter. (3) with vibration cleaning bag filter class refers to both vibration and reverse gas flow dual action cleaning bag filter. Vibration makes dust cake loose, reverse air flow so that dust out, two ways of mutual cooperation, to improve the cleaning effect, especially for fine dust particles sticky. Filter selection principles such precipitator substantially sub-room cleaning dust the same class, in order to use satin (or twill) woven filter based. With the improvement of the level of technology and product quality needle felt, the trend is to strengthen the choice of fabric, dimensionally stable thin needle felt. (4) nozzle cleaning bag filter class is to use the fan to do cleaning dust power, when the dust filtering state, by moving the nozzle to turn the bag blowing, forming a strong reverse flow. For cleaning bag filter bag, it is a medium kinetic energy cleaning type. In the bag filter cleaning nozzle has a rotary cleaning, gas ring back and forth several forms of blowback blowback slide and so on. Rotary cleaning and reciprocating blowback bag filter framework for use with external filter bags in the form of flat, compact structure. Such dust requires selection of relatively soft, structural stability, good wear resistance of the filter, the priority for the needle felt filter medium thickness, mass per unit area of 350 ~ 500g / m. Slide the gas ring cleaning bag filter cleaning nozzle belonging to the class of a particular form of bag filter used in the filter bags circle, slot-shaped nozzle is a ring, set in a circle outside the bag under the mobile injection. Requires selection of thick, wear-resistant, rigid, lint filter, should use compressed felt and needle felt, filter bag because of serious wear and tear, such dust rarely use. (5) means a pulse jet baghouse class powered by compressed air, the use of pulse jet institutions in the instant release of the compressed air flow, the secondary air induced by multiple high-speed shoot people bags to rapid expansion. Rely on shock and vibration and reverse flow cleaning baghouse cleaning is a high kinetic energy type, which is usually used with a dust filter skeleton outer circle bag or flat bag. Requires selection of thick, wear-resistant, anti-Zhang Liqiang of the media, preferred fiber needle felt or compressed felt media, mass per unit area of 500 ~ 650g / m.