INFLUENCE OF WEEPING ON MASS-TRANSFER RATE OF DIFFERENT PLATES

The influence of weeping on the mass transfer of different industrial plates was investigated in a 400 mm inside diameter column equipped wi th 4 plates. The absorption of acetone from air to tap water was measu red on vibrating valve, Nutter valve, Glitch valve, sieve and turbogri d plates with varied weir heights. The weeping was determined by a dir ect method. The tray efficiency (eta) of the investigated plates decre ased 1-5% with the increase of weeping rate, while it decreased 10-25% with the increase of weir height. Mass transfer characteristics of th e above plates, namely recovery efficiency (E), volumetric mass transf er coefficient (K(G)a) and pressure drop related to one theoretical pl ate (Delta p/N-th) were measured and compared.