Acid dew-point condensation can form aggressive liquid on cool mist eliminator frames, clips, and support rings even when the central gas and active media remain relatively dry. Local cold spots, insulation, wet-dry cycling, drainage, and structural materials should therefore be reviewed together.

Evaporative crystallizer mist eliminators handle highly concentrated mother-liquor droplets that can crystallize directly inside the separator. Boiling entrainment, scaling, vacuum pressure drop, wash strategy, open geometry, and condensate purity are central design issues.

Wastewater odor-control scrubbers can expose demisters to H₂S or ammonia chemistry, salts, biological fouling, outdoor conditions, and low fan-pressure margins. Open geometry, corrosion resistance, drainage, washability, and maintenance access are key.

Fiber-bed aerosol removal can deteriorate when gas channels through low-resistance regions caused by uneven media packing, edge gaps, settlement, uneven wetting, or partial plugging. Poor efficiency with normal or low DP can therefore indicate bypass rather than insufficient fiber density.

Low scrubber blowdown can increase dissolved salts and suspended solids in recirculating liquor, accelerating demister crystallization, particulate fouling, DP rise, and cleaning frequency even when gas and liquid flow remain unchanged.