How to distinguish fine, sticky oil mist and aerosol duty from dry particulate collection when assessing WESP, filters and wet pretreatment.
Baghouses and cartridge collectors are commonly evaluated for dry particulate such as cutting dust, grinding dust and powder handling. Fine oil mist, greasy aerosol and condensable fume can adhere to dry filter media and require a different collection approach.
Wet electrostatic precipitators charge and collect fine particulate or aerosol on irrigated collection surfaces. The continuous washing action makes WESP a useful option for sticky or oily fine mist, often after an upstream scrubber or other conditioning stage.
A spray scrubber or other front-end stage can cool the gas, remove coarse load and condition the stream before WESP polishing. The correct arrangement depends on droplet carryover, grease loading, gas temperature, corrosion and wastewater management.
WESP primarily addresses fine particulate, oil mist and aerosol. If the exhaust also contains a material organic-gas load, a separate adsorption, oxidation or odor-control stage may be required after the pollutant chemistry is reviewed.
