2023-03-29
The running resistance of the dust bag is mainly composed of structural resistance and filtration resistance.
Among them, the structural resistance △P refers to the local resistance and the resistance along the process caused by the inlet and outlet valves and distribution pipes of the dust collector, which can be calculated and determined with the help of the calculation formula specified in the relevant design manual, usually 200~500Pa. This part of resistance is inevitable, but it can be reduced as much as possible by adopting reasonable structure and fluid mechanics design, so that it does not exceed 20%~30% of the total resistance of the dust collector.
Filter resistance unloading refers to the local resistance caused by the dust collector filter element itself, including the resistance of the clean filter material and the resistance of the dust layer. It is affected by many factors such as filter material structure, smoke characteristics, filter load, and operating conditions. and has random uncertainty. Filtration resistance accounts for the main share of the total resistance of the dust collector.
The resistance value of the cleaning filter material The cleaning filter material is not a real "filter element" in essence, but an appendage of the primary and secondary dust layers that are actually filtered. However, the structure and resistance characteristics of the clean filter material itself play a key role in the establishment of the dust layer and the overall filter performance. In the field of industrial dust removal, the filter speed of the bag filter is low, the flow of gas in the filter material is a viscous laminar flow, and the resistance OP (Pa) of the clean filter material is proportional to the filter speed.
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