Gas dust removal methods include filtration, electrostatic, cyclone, inertia, and wet types (e.g., spray, venturi, foam). Filtration offers high accuracy using porous materials, with mechanisms like screening (intercepting particles larger than pores), inertial collision (multiple collisions trap particles), and adsorption (surface/pore adhesion of fine particles).
For non-dust-removal filters, dust removal efficiency (particle retention rate) serves as a key performance metric, indirectly reflecting pore size and filtration accuracy. Filtration efficiency measures the percentage of trapped dust relative to initial levels, while gas flow attenuation evaluates pollutant-holding capacity. Reliable dust removal efficiency testing is crucial for filter material R&D, production, and application.
