Separated liquid can be re-entrained below a mist eliminator when falling droplets, films, or drainage streams encounter high upward gas velocity or poorly arranged support structures. Protected drainage paths, adequate clearance, and safe liquid return are therefore essential to separator capacity.

Tangential inlets, cyclonic devices, and duct geometry can create swirling gas flow that produces uneven local velocity, angled vane entry, perimeter liquid loading, vibration, and misleading DP measurements. Strong swirl should be reduced or included explicitly in mist eliminator design.

Wall liquid films from spray impingement, condensation, packing, or splashing can travel around the perimeter of a mist eliminator even when gas passes correctly through the media. Edge geometry, support rings, perimeter drainage, and upstream liquid distribution should therefore be included in carryover troubleshooting.

Mist eliminator performance may remain poor after an overload because retained liquid, foam, blocked drainage, redistributed deposits, or mechanical deformation can persist after gas flow returns to normal. Recovery trend over time helps distinguish temporary hydraulic saturation from permanent damage.

High mist carryover combined with unexpectedly low pressure drop can indicate perimeter bypass, open segment joints, displaced mesh, damaged vane modules, or an incorrect replacement separator. Low DP should therefore be compared with the historical clean baseline rather than assumed to indicate good condition.