Air Distribution Plates The air flow distribution of the cartridge dust collector is important. It must be considered how to avoid high wear areas of the filter material at the inlet of the equipment due to high wind speeds. The air distribution plate has unique requirements for filter cartridge dust collectors, and the air distribution must be very stable and uniform. It is beneficial to the rise of air flow and the reduction of dust. The opening rate of the air distribution plate is 35%. According to the calculation, the drag coefficient is less than 2. It can be seen that the porous air distribution plate can meet the requirements of the filter dust collector when the air flow velocity is less than 0.8 m/s.
The filter material is the core part of the filter cartridge dust collector, and it is also the key to the success or failure of the filter cartridge dust collector. In the past, the filter media generally used paper sheet filter media. The filter media had >99.9% filtration efficiency for >0.5um dust. However, its disadvantage is that it has a large dust holding capacity and it is difficult to remove dust. It is not suitable for high concentrations and solves the above difficulties. The existing filter bags on the market use a needle-punched filter material as a filter material for deep filtration. The filter bag needs to establish a primary dust cake on its surface at the beginning of the work. Dust can easily penetrate this filter, increase emissions, or block air passages, causing premature filter bag failure. Especially when collecting dust with dust, it is easier to stick bags. Dazhi filter media has the following characteristics:
The usual filter is deep filtration. It depends on the dust layer on the surface of the filter to achieve effective filtration. The effective filtration time is about 10% of the entire filtration process. The membrane filter is surface filtration, dust does not penetrate into the filter, no initial filtration period, and the beginning is close to 100% effective filtration.
After entering the high concentration of dust, the traditional filter material has lower air permeability and higher resistance. The coated filter material has a uniform fine pore size and its non-viscous properties. It immediately provides excellent filtration performance immediately after use. The dust transmission rate is approximately zero, and the resistance is basically stable. After being tested at a filtration speed of 1-2 m/min, Its resistance is about 300-500Pa.
For needle felt filter material, high-energy pulse jet flushing is generally used to maintain the conventional resistance of the filter media. With coated film filters, the conventional resistance of the filter media can be maintained by reducing the jetting strength by 30%-50%.