Selection of dust bag (filter bag) according to cleaning methods

The dust removal method of the bag filter is the primary condition for selecting the type of dust bag (filter bag). It can first determine whether the dust bag (filter material) is a woven fabric, needle felt, compressed felt, or dust bag (glass fiber filter bag). As for the detailed specifications of the dust bag (filter bag), further consideration can be given based on other filter conditions.
1. Vibration cleaning: This kind of cleaning method is characterized in that the kinetic energy applied to the dust layer is smaller than the pulse injection and anti-blowing type. It is a low-energy type of cleaning, so it is better to use a fabric dust filter bag. The soft-weave woven fabric has good vibration wave transmission.
2, back blowing (anti-sucking shrink bag) cleaning: This method of cleaning commonly used fabric dust bag (filter bag), but can also use lighter weight (300 ~ 400g/m2), rich flexibility, size Small change felt material. Among them, the use of glass fiber dust bag (filter bag) is the most, and it is mostly used for large bag filter. Dust filter bag lifting, sewing, etc. have certain requirements, if not pay attention to the dust filter bag has a greater impact on the service life.
3. Pulse jet cleaning: This kind of cleaning method has the highest cleaning kinetic energy applied to the dust layer. It is a typical method of external filter cleaning. The fine ash power is very strong, and the residual amount of dust attached inside the dust bag (filter bag) yarn is relatively small, and the dust bag (filter bag) used is generally a felt or a needle felt. The dust filter bag under the pulse jet action is very deformed instantaneously, resulting in great stress, so it is necessary to use strong filter media. The dust bag (filter bag) often rubs against the skeleton, so wear-resistant dust filter bags are used, and fabric dust bags (filter bags) can also be used.
4. Gas ring cleaning and ash cleaning: As this ash removal performance is quite good, the dust bag (filter bag) is required to have good rigidity, fine pores, and good wear resistance. In this way, the air ring is reciprocated up and down. When the dust discharging valve moves, the dust bag (filter bag) will not change and it will not fluff. So limit the use of felt or needle felt. And thick, high density felts are required. Cloth weight should generally be 600 ~ 800g/m2 is appropriate.
5. Pulsating reverse blow cleaning: The kinetic energy of dust applied by this method is in the middle of high energy type and low kinetic energy type. This kind of dust removal requires that the dust bag (filter material) is flexible and also requires a certain degree of rigidity. .
When fabric dust filter bags are used, satin and twill fabrics are suitable. However, from the aspects of dust removal efficiency, filtration speed, and anti-wear strength of the skeleton, it is appropriate to use needle felts. The best choice is 300 600g/m2 needle felt. Very few woven fabrics are used, and if necessary, various surface treatments should be performed.
6. Back-blow-vibration cleaning: This list of bag-type dust collector ash is a low-energy kinetic energy applied to the dust layer. The initial use of fabric dust bag (filter bag) is mostly. At present, the majority of needle felts are mainly used to increase the filtration speed. The needle felt requires a cloth weight of 280-350 g/m 2 and a thickness of 1.0-1.3 mm, which is better in air permeability.