DEMISTER Features (Mesh Pad type)

DEMISTER Features (Mesh Pad type) Specification TCI mesh mist eliminators are manufactured in a wide variety of metals and synthetics of which the following are supplied as standard:- Stainless steels (types 304, 304L, 316, 316L, 321, 430) Monel Nickel & nickel alloys Copper & copper alloys Glass wool or fibre Polypropylene Halar / PTFE The wire mesh may be knitted and formed to provide a wide range of specific properties to suit various applications. The following is a list of standard mesh styles that we supply:- STYLE APPLICATIONS HE High efficiency removal of fine mists GP General purpose (maximum efficiency with low pressure loss) DS Dirty service where fouling is an issue Mist Eliminator Design Mesh pads should be sized so that the face area provides a vapour rate of approximately 80% of the maximum allowable re-entrainment velocity. For estimation purposes, suitable design velocities occur at a K-factor of 0.11 m/s for vertical flow, or 0.15 for horizontal gas flow (due to better drainage) where:- vs = K . {( L - V )/ V} 0.5 where vs = Actual vapour velocity (m/s) V = Vapour density (kg/m3) L = Liquid density (kg/m3) Operating pressure loss across the pad within the above design range is normally less than 0.5 kPa depending upon mesh density, pad thickness, liquid loading and vapour rate. An approximate pressure drop can be estimated from the formula: Wet P (kPa) = C . (L – V) . K2 . t Where C = 0.20 for a typical ‘GP’ style mesh demister, and t is the pad thickness in metres. Note that the dry pressure drop is about half of the wet figure.