Principal of vane type separation
Vane type mist eliminators remove liquid droplets from continuous gas flows by inertial impaction. As the gas (carrying entrained liquid droplets) moves through the sinusoidal path of a vane, the higher density liquid droplets cannot follow and as a result, at every turn of the vane blades, these liquid droplets impinge on the vane surface. Most of the droplets adhere to the vane wall. When a droplet impinges on the vane blade at the same location, coalescence occurs. The coalesced droplets then drain down due to gravity.
Horizontal and vertical gas flows
A horizontal gas flow direction is always preferable to a vertical gas flow direction. In vertical gas flows, the drain direction of the liquid is opposite to the gas flow. In a horizontal gas flow, the collected liquid drains at 90º to the gas flow, to minimize re-entrainment and allow higher velocities .