Patent ID: 6042089
Filing Date: 2000-03-28
Classification: B01F,B05B,Y10S

Abstract:
A device for forming foam by the Venturi effect, mixing a substance in liquid phase and a substance in gas phase, the device comprising a liquid insertion nozzle on a same axis as a Venturi stage comprising a converging portion disposed facing the nozzle, the Venturi stave having a throat of diameter ""D"", and a gas inlet coaxial with the nozzle and in communication with the converging portion, a gas being sucked in by the Venturi effect and directed to a mixing chamber connected to a foam outlet, wherein a diverging portion of the Venturi stage comprises at least three zones of progressive cone angles, with discontinuities between the zones, co-operating with a geometry of the diverging portion to give rise to a cavitation phenomenon, and opening out into a turbulence area of the mixing chamber, mixing between the two phases taking place in a free jet.