Mist entrained in vapour coming out from commonly used equipment, as evaporators, boilers, distillation columns, has to be separated since it can cause air pollution, corrosion, decrease in equipment performance or loss of the processed material. Among the separation devices, vane-type demisters, which separate the liquid droplets by inertial impaction, are usually adopted in many applications, but the desing if often based only on experience. Due to the absence of reliable data and design equations, the present study shows a theoretical and experimental analysis of this type of separators aimed at defining the collection efficiency as a function of working conditions and some geometrical characteristics. Various packing-types were tested in order to investogate the dependence of the separation efficiency on the most important geometric characteristics of vane-type demistes. The analysis and the results allow to evidence the adimentional numbers characterizing the process and to develop a predicting equation to compute the abatement efficiency for both commercial and not commercial vane-type demisters.
An experimental study of gas-liquid separation in vane-type demisters
BRUNAZZI, ELISABETTA;NARDINI, GIULIANO;
1996-01-01
Abstract
Mist entrained in vapour coming out from commonly used equipment, as evaporators, boilers, distillation columns, has to be separated since it can cause air pollution, corrosion, decrease in equipment performance or loss of the processed material. Among the separation devices, vane-type demisters, which separate the liquid droplets by inertial impaction, are usually adopted in many applications, but the desing if often based only on experience. Due to the absence of reliable data and design equations, the present study shows a theoretical and experimental analysis of this type of separators aimed at defining the collection efficiency as a function of working conditions and some geometrical characteristics. Various packing-types were tested in order to investogate the dependence of the separation efficiency on the most important geometric characteristics of vane-type demistes. The analysis and the results allow to evidence the adimentional numbers characterizing the process and to develop a predicting equation to compute the abatement efficiency for both commercial and not commercial vane-type demisters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
