Ranking of Dust Collection Efficiency by Type (Under Steady-State Compliance Conditions)
PTFE-Membrane Fabric Bag/Filter Cartridge Dust Collectors: Dust collection efficiency of 99.5%–99.99%; outlet dust concentration consistently ≤5 mg/m³; capable of capturing ultrafine dust (0.1 μm); efficiency remains stable without degradation during long-term operation; the top choice for standard processing plants to meet environmental compliance standards.
Wet Electrostatic Precipitators (WESP): Dust collection efficiency of 99.2%–99.9%; specifically designed for challenging applications such as saturated wet flue gas (post-desulfurization), PM2.5, and acid mist; eliminates issues with secondary dust re-entrainment caused by mechanical rapping.
Electrostatic-Fabric Hybrid Dust Collectors: Dust collection efficiency of 99%–99.8%; combines the advantages of electrostatic and fabric filtration; results in lower filter bag wear and more controllable O&M costs; suitable for high-volume flue gas applications in power plants.
Conventional Fabric Bag/Standard Filter Cartridge Dust Collectors: Dust collection efficiency of 98%–99.5%; filter media without membrane coatings are prone to penetration by fine dust and clogging from oil/grease contamination; efficiency tends to decline over long-term operation.
Dry Electrostatic Precipitators (ESP): Dust collection efficiency fluctuates significantly (85%–99%); performance is effective only when dust resistivity is optimal; prone to back-corona and dust bypass-leading to a sharp drop in efficiency-when handling high-resistivity dust or ultrafine welding fumes.
Wet Scrubber Dust Collectors: Dust collection efficiency of 90%–98%; characterized by high airflow resistance and large wastewater volumes; offers insufficient purification capability for fine dust.
Cyclone Dust Collectors:Dust collection efficiency of only 70%–88%; suitable only for coarse dust pre-separation; cannot independently meet ultra-low emission requirements.
