Filtration Mechanism of Bag Filters: Bag filters operate on the principle of mechanical filtration, which involves the physical removal of particles from the air stream. The filter media, typically made from synthetic fibers or woven fabrics, form a barrier that catches and retains airborne particles. As the air passes through the filter, larger particles are captured on the surface of the bag, while smaller particles are trapped within the filter media.

Factors Affecting Filtration Efficiency: The filtration efficiency of bag filters depends on various factors, including the size, shape, and density of the particles, as well as the flow rate and pressure drop across the filter. The size of the particles is particularly crucial since smaller particles have a higher tendency to pass through the filter media. Bag filters with smaller pore sizes provide higher filtration efficiency for fine particles.

High Filtration Efficiency: Bag filters are known for their high filtration efficiency, especially for particles in the micron range. They can effectively remove dust, pollen, mold spores, and other particulate matter from the air. The filter media's large surface area and the depth of the filter bed contribute to the high efficiency, allowing for a greater contact area between the particles and the filter.

Benefits of Bag Filters: Bag filters offer several advantages over other filtration methods. Firstly, they provide a high dust-holding capacity, which means they can retain a large amount of particles before requiring replacement or cleaning. Additionally, bag filters have a low pressure drop, ensuring minimal energy consumption and reduced operational costs. Moreover, bag filters are versatile and can be used in various industries such as pharmaceuticals, food processing, cement production, and power generation.

Maintenance and Longevity: Regular maintenance is crucial to ensure the longevity and optimal performance of bag filters. This includes periodic cleaning or replacement of the bags to prevent clogging and maintain the filtration efficiency. Proper maintenance practices, such as regular inspections and following manufacturer recommendations, can significantly extend the lifespan of the bag filters.