Mist eliminator handbook
Six short answers — principle, selection, velocity, ΔP, drainage, service
How a mist eliminator works: three mechanisms without magic
Inertia + interception + coalescence: an explanation without an "efficiency of 99%"
How to select a mist eliminator: five steps
Point → duty → family → calculation → data sheet: five verifiable steps
Flow velocity: face, free and vane channels
v_face ≠ v_free ≠ velocity in the channels: three velocities and when each is needed
Pressure drop ΔP: how to read it and where the coefficient comes from
ΔP = ζ·ρ·v²/2: ζ from the data sheet of the specific model, referenced to a section
Drainage and re-entrainment: what happens without runoff
No drainage → over-wetting → drops blown back: the main cause of "the mist eliminator does not work"
Mist eliminator installation and service
Access, washing, drainage inspection — the schedule comes from the data sheet, not "once a year out of habit"
Four calculations to run before writing to a supplier
| Tool | Input | Result | What it does not do |
|---|---|---|---|
| Airflow velocity | Q, W, H (+ k_open) | v_face, A_face; v_free with k | does not replace the model datasheet velocity |
| Required section | Q, v_target (± W or H) | A_req, H_min / W_min | never inserts a “recommended velocity” |
| Pressure drop ΔP | ζ (from source), ρ, v_ref | ΔP, Pa | no ζ — no result; invents no curves |
| Energy impact of ΔP | Q, ΔP, hours, η | power and energy/year | does not replace the electricity bill |
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