The general dust bag is made of needle felt, woven fabric, cotton fiber, etc. Since the vacancy of the filter material itself is large at the beginning of use, some of the smaller dust will directly pass through the vacant outlet, so when the dust is first collected, a dust layer is formed on the surface of the bag, and then the subsequent dust filtering operation is performed. After long-term use, the dust on the surface of the filter material will gradually enter the filter, resulting in blockage of the venting hole of the bag, and the working resistance of the device is continuously increased, so the service life of the bag is not too high. A general dust bag can only filter general dust.
The film dusting cloth bag is a new type of cloth bag made of a layer of polytetrafluoroethylene (PTFE) film on the surface of ordinary filter material. The surface is smooth and resistant to various chemical substances, which can play the role of water and oil proof. It has the name of unaged fiber. This layer of PTFE film acts as a dust layer. Therefore, the bag can obtain an effective filtering effect at the beginning of use. The film structure is a unique three-dimensional mesh shape, which can effectively block the dust outside the bag and has no worries of pores.
PTFE coated dust bag has the following advantages compared to ordinary dust bag:
1.High surface efficiency
The ordinary dust-removing cloth bag relies on the initial layer formed on the surface of the filter material for effective filtration during dust removal operation, and the effective filtration time is about 10% of the entire filter process, and the resistance is large, the efficiency is low, and the interception is not complete enough. After the bag is coated, the dust can only be filtered on the surface of the bag and cannot pass through the vent hole of the bag, regardless of whether the dust is thick or thin, it can be blocked outside the bag.
2. easy to clean gray
When the ordinary cloth bag is used for a long time, it will block a large amount of dust in the vent hole, which is extremely difficult to remove. The surface of the membrane filter material is smooth, the cleaning is very easy and very special, the effect of cleaning is very thorough, and it does not change the porosity and mass density of the filter material itself.
3. low energy consumption, low resistance
After replacing the ordinary dust bag of the dust removal equipment with the PTFE coated cloth bag, the resistance of the dust removal system can be reduced by 40–50%, which can save 20–30% energy consumption, and the measured air volume can be increased by about 30%. The economic and social benefits of the membrane filter bag are very significant.
4. can work continuously with low pressure and high flux
The ordinary filter material will form a dust layer after the start of use, and the gas permeability of the bag will decrease. The accumulation of dust inside the bag for a long time will also cause the filter bag to become clogged. The PTFE coated dust bag has a micro-pore diameter and non-stickiness to make the dust penetration rate close to 0. The dust removal efficiency is very good during use. When the dust accumulates on the surface of the filter material to a certain thickness, it will fall off automatically. Gray, so the filtration pressure will be very small, and the bag is very breathable.
5. long life
It is well known that the filter material of the PTFE coated dust bag is called unaged fiber. Its high gas permeability, good sliding stability, high temperature resistance and other characteristics greatly maintain the service life of the dust bag, and its special structure prevents the vent hole of the bag from being clogged. PTFE is compounded with strong materials and therefore has a property of being less prone to wear.