| Electrostatic precipitator (ESP) | About 5–50 mg/Nm³ in many installations; results vary with particle properties, gas flow, and collector design. | About 100–300 Pa across the collecting sections. | Large, continuous gas streams; relatively stable flow and temperature; particles that can be electrically charged and collected. | Low gas-side pressure drop and no filter fabric to replace. Can handle high gas volumes and, with suitable design, elevated temperatures. | Collection can be affected by dust resistivity, particle-size distribution, gas chemistry, and rapid load changes. Check electrode maintenance, rapping performance, and performance at minimum and maximum load. |
| Fabric filter (baghouse) | About 1–10 mg/Nm³ is commonly achievable with appropriate media, sealing, and operation; site-specific guarantees may differ. | About 1,000–2,000 Pa during normal operation; the value changes with dust cake and cleaning settings. | Applications where fine-particle capture and consistently low particulate emissions are priorities, provided gas temperature, moisture, and chemistry suit the selected filter media. | High fine-particle collection efficiency and comparatively consistent outlet performance when bags and seals are maintained. | Higher pressure drop and fan energy than an ESP. Confirm maximum temperature, acid or alkali resistance, condensation risk, bag life, cleaning system, and fire or explosion controls where relevant. |
| Wet electrostatic precipitator (WESP) | Often about 1–10 mg/Nm³ for particulate matter in suitable polishing applications; actual performance depends on inlet conditions and design. | About 100–500 Pa, depending on equipment configuration and gas-flow conditions. | Wet or saturated gas streams and polishing duties involving fine particles, aerosols, or acid mist. Often installed downstream of upstream particulate or scrubbing equipment. | Can collect fine droplets and particles that are difficult to capture with some dry systems; avoids dry-dust re-entrainment from rapping. | Requires water management, drainage, and materials compatible with corrosive condensate. Assess wastewater handling, scaling or fouling potential, and performance during start-up and shutdown. |
| Cyclone separator | Often about 50–500 mg/Nm³ as a standalone collector, with performance strongly dependent on particle size and design; generally not a fine-particle polishing device. | About 500–1,500 Pa, depending on the cyclone type and operating point. | Pre-cleaning of relatively coarse, dry dust at steady flow, commonly upstream of a baghouse or ESP. | Simple construction, no filter media, and useful removal of larger particles. Can reduce the dust loading on downstream equipment. | Limited capture of fine particles and potential erosion with abrasive dust. Check inlet velocity, particle-size distribution, wear protection, and pressure-drop impact on the fan. |
| Ceramic or sintered-metal candle filter | About 1–10 mg/Nm³ may be achievable in suitable high-temperature filtration systems; confirm the specified test basis and operating envelope. | Often about 1,000–2,500 Pa, varying with filter elements, dust cake, and pulse-cleaning conditions. | Selected high-temperature processes where gas cooling before filtration is undesirable and the dust and gas chemistry are compatible with the elements. | Fine-particle filtration at temperatures beyond the range of many conventional fabric bags, subject to the element material and system design. | Higher system complexity and potentially higher element replacement costs. Verify thermal-shock resistance, corrosion compatibility, cleaning reliability, and availability of replacement elements. |