Equipment for the atomisation of a liquid stream by means of a dispersing gaseous stream and for mixing the atomised product with a further suitable gaseous stream, characterized in that it comprises: a feeding zone (A) equipped with means suitable for feeding the liquid stream, the gaseous dispersing stream and further gaseous stream; one or more two-stage atomisation zones (N) of the liquid stream by means of the gaseous dispersing stream; a distribution zone (D) of the further gaseous stream; the first stage of the atomisation zone (N1) essentially consisting of a tubular core (2), through which the liquid stream passes, equipped with an appropriate series of nozzles (5), situated at the same height, and an outer jacket (4) coaxial to said core, through which the gaseous dispersing stream passes, wherein said nozzles (5) allow the gaseous dispersing stream to enter the tubular core, perpendicularly to the axis of said tubular core (2), effecting a first atomisation of the liquid stream, the second stage of the atomisation zone (N2) essentially consisting of one or more nozzles (6) positioned at the end of the tubular core (2), parallel to the axis of said tubular core, to increase the atomisation degree, the distribution zone (D) essentially consisting of a further jacket (8), through which the further gaseous stream passes, external and coaxial to the jacket (4) of the first atomisation stage, and a series of nozzles (9) situated at the bottom of said further jacket, all positioned at the same height and parallel or inclined with an alpha angle lower than 40° with respect to the axis of the tubular core.