Advantages of membrane air dust filter bags

What are the advantages of various dust removal bags in use?

The film coating process is based on ordinary filter material, and the surface is covered with a special film that makes the filtration more precise, so that the dust removal efficiency of the dust bag is higher and the service life is longer. The significant advantages of film-coated cloth bags are as follows:

1. Under normal circumstances, the filtration form of industrial dust filter bags is deep filtration, and effective filtration is achieved by forming a dust layer on the surface of the dust bag. The time from the beginning of filtration to the formation of effective filtration is relatively long, accounting for about 10% of the entire filtration process. The resistance is relatively large, the filtration efficiency is also very low, the retention is incomplete, and the pressure during filtration and backflushing is also relatively high. , frequent ash cleaning, high energy consumption, short service life, and large equipment area. Using the dust filter bag made of film-coated filter material, dust cannot enter the bag, and it is close to surface filtration. Whether it is coarse or fine dust, almost all of it is blocked on the surface of the filter material. There is no initial filtration period, and it is directly effective filtration. , nearly 100% of the time in a filtered state.

2. Long life. No matter what cleaning mechanism is adopted, the film-coated filter material can exert superior performance. It is a filter material that fully utilizes the design function of the dust collector. Therefore, the cost is low. Membrane-coated filter material is a kind of soft and yet strong organizational structure. It has sufficient mechanical strength and excellent deashing performance, which reduces the cleaning strength. Under the low and stable pressure loss, it can be used for a long time. Extend filter bag life.

3. Low pressure, high flux continuous work. Once the traditional depth filtration filter material is put into use, the dust penetrates and a dust layer is established, and the air permeability decreases rapidly. During filtration, the accumulated dust inside causes clogging, which increases the resistance of the dust removal equipment. The membrane filter material has a fine pore size and lower viscosity, so that the dust penetration rate is close to zero, and it provides the best filtration efficiency when it is put into use. When the filter material deposited on the surface of the membrane filter material reaches a certain thickness, it will It automatically falls off and is easy to clean, so that the filtration pressure is always kept at a very low level, the air flow is always kept at a high level, and it can work continuously.

4. Easy to clean. The operating pressure loss of any filter material directly depends on the amount of dust remaining or remaining on the surface of the filter material after cleaning, and the length of cleaning time (membrane-coated filter material only takes a few seconds). The dust-removing characteristics can completely remove the dust layer every time, the filter material will not cause blockage inside, will not change the porosity and mass density, and can often maintain low-pressure loss work.

It should be noted that although the membrane-coated filter material has various advantages, it is not suitable for filtering the exhaust gas with high dust and abrasiveness, because the dust with sharp edges and corners will pierce the membrane and lose the effect of surface filtration.