Liquid carryover can wet activated carbon and molecular sieve beds, block pore access, carry salts or oils into the media, increase pressure drop, and shorten adsorption or drying cycles. Upstream bulk and fine mist separation should therefore be matched to the downstream media tolerance.

Quench towers create mist through spray atomization, rapid cooling, condensation, and turbulent gas-liquid interaction. Their mist eliminators must handle high liquid load, possible solids, temperature transients, uneven gas distribution, and strong drainage requirements.

Hygroscopic and deliquescent salts can absorb water from humid gas, turning dry deposits into sticky or liquid brine layers that increase pressure drop, reduce drainage, and trap additional solids. Seasonal humidity and temperature changes can therefore alter demister fouling behavior.

Oscillating mist eliminator DP often indicates dynamic liquid inventory, foaming, intermittent slugs, drainage cycling, or changing gas/liquid load rather than steady permanent fouling. Correlating DP with process signals can reveal the mechanism.

Dry DP testing can identify major geometry or fabrication problems but cannot verify wet liquid-handling capacity, flooding behavior, drainage, or re-entrainment. A clean wet operating baseline after commissioning is therefore essential.