In a self-induces spray scrubber, dust collection occurs from the interaction of a moving gas stream and a liquid surface.
Typically, two cleaning actions are involved. Firstly, the gas stream is accelerated towards the liquid surface and made to impact upon it, causing a sharp turn in the direction of flow.
This removes the majority of the high inertia particles.
Secondly, the turbulence of this action forms a fine spray of droplets on which secondary collection occurs.