FIELD: machine building.
SUBSTANCE: invention relates to methods and devices for flotation treatment of liquid wastes. Nozzle for injection of water under pressure containing dissolved gas, wherein said nozzle comprises: a cylindrical inlet chamber for said water, a cylindrical expansion chamber comprising an inlet communicating with said inlet chamber through an opening, and outlet, diffusion chamber with truncated cone section, communicating with outlet of said expansion chamber and expanding, starting from said expansion chamber, wherein said nozzle comprises means to rotate water flow leaving said expansion chamber.
EFFECT: technical result is energy dissipation and improved adhesion of bubbles with flakes.
14 cl, 11 dwg
