Advantages of Bag Dust Collectors:
(1) High Filtration Wind Speed and Compact Design: One of the standout features of pulse bag dust collectors is their ability to achieve a filtration wind speed of up to 2-4 meters per minute. This is significantly higher compared to other types of bag dust collectors, allowing for a reduced filtration area and a more compact design. For example, when processing 10,000 cubic meters of air per hour, the weight of a pulse bag dust collector typically ranges from 2 to 5 tons, while a cylindrical rotary flat bag system weighs between 0.7 to 7 tons, and a back-blown system around 5 to 8 tons. The short pulse period (30-60 seconds) combined with high dust removal efficiency contributes to this compactness.
(2) Stable Airflow and Pressure: Unlike traditional systems where the filter bag chambers are divided into separate sections, pulse bag dust collectors operate by sequentially blowing air across rows of filters. This method ensures that the air volume remains consistent without periodic fluctuations caused by individual blow cycles. Consequently, the pressure loss within the system remains relatively stable throughout operation.
(3) Minimal Maintenance Requirements & Long Filter Life: A major advantage of pulse bag dust collectors lies in their low maintenance needs. Apart from the pulsing mechanism, there are no moving parts inside the device, minimizing mechanical wear and tear. Additionally, during cleaning processes, the filter bags undergo minimal deformation, extending their lifespan considerably.
When determining the required capacity for a bag dust collector, it's essential first to calculate the process gas volume under working conditions—this includes both the actual airflow through the system and any internal air leaks. Such calculations should ideally rely on empirical factory data or inspections; however, if such specifics aren't available, estimates may be derived from production outputs alongside supplementary air inputs via collection hoods (approximately 20%-40%). The optimal filtration velocity will depend on factors like gas characteristics, fabric types used, and specific dust properties. Typically, these values are chosen according to manufacturer guidelines coupled with field expertise gained over time.
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