General dust removal cloth bags are made of needled felt, woven fabric, cotton and hemp fiber and other materials. Due to the large vacancy of the filter material itself at the initial stage of operation, some small dust will directly pass through the vacancy and be discharged through the exhaust port. Therefore, when collecting dust for the first time, a dust layer will be formed on the surface of the cloth bag, and then the subsequent dust filtration operation will be carried out. After long-term use, the dust on the surface of the filter material will gradually enter the filter material, resulting in the blockage of the bag vent hole and the increasing working resistance of the equipment. Therefore, the service life of the bag is not too long. General dust removal cloth bags can only filter general dust.
The film covered dust filter bag is a new type of cloth bag made by compounding a layer of polytetrafluoroethylene (PTFE) film on the surface of ordinary filter material. Its surface is smooth and resistant to various chemicals. It can play the role of water repellent, oil resistant and electricity resistant. It is known as “non aging fiber”. This PTFE film acts as a dust layer. Therefore, the cloth bag can get effective filtration effect in the early stage of use. The film covered structure is a unique three-dimensional network, which can effectively block the dust outside the cloth bag without the worry of pore blockage.
PTFE coated dust collector filter bag has the following advantages over ordinary dust removal cloth bag:
- High surface efficiency
Ordinary dust removal cloth bags rely on the initial layer formed on the surface of the filter material for effective filtration during dust removal. The effective filtration time is about 10% of the whole filtration process. The resistance is large, the efficiency is low, and the interception is not complete. After the cloth bag is coated with film, the dust can only be filtered on the surface of the cloth bag and cannot pass through the air hole of the cloth bag. No matter whether the dust is coarse or fine, it can be blocked outside the dust removal cloth bag.
- Easy to clean
A large amount of dust will be blocked in the air holes of ordinary cloth bags after long-term use, which is very difficult to remove. The surface of the membrane covered filter material is smooth, the ash removal is very easy and special, the effect of ash removal is also very thorough, and the porosity and mass density of the filter material will not be changed.
- Low energy consumption and resistance
After replacing the common dust removal cloth bag of the dust removal equipment with PTFE coated cloth bag, the resistance of the dust removal system can be reduced by 40-50%, which can save 20-30% of energy consumption, and the measured treatment air volume can be increased by about 30%. The economic and social benefits of the membrane filter bag are very obvious and considerable.
- It can work continuously with low voltage and high flux
The ordinary filter material will form a dust layer after it is used, and the air permeability of the bag will decrease. The dust accumulation inside the bag after long-term use will also cause the blockage of the filter bag. PTFE film covered dust removal cloth bag makes the dust penetration rate close to 0 due to its micro pore size and non viscosity. The dust removal and filtration efficiency is very good during use. When the dust accumulates on the surface of the filter material to a certain thickness, it will automatically fall off, which is convenient for dust removal. In this way, the filtration pressure will be very small, and the air permeability of the cloth bag is very good.
- Long life
As we all know, the filter material of PTFE coated dust removal cloth bag is called “non aging fiber”. Its high permeability, good sliding stability, high temperature resistance and other characteristics greatly maintain the service life of the dust removal cloth bag. Its special structure prevents the air holes of the cloth bag from being blocked. PTFE is compounded with strong materials, so it is not easy to wear.
If you are seeking forPTFE filter bag supplier, Sffiltech is your best choice.