Abstract: The method serves to control substances present in a liquid; a liquid mass is brought to temperature and pressure conditions such as to give rise to an appreciable evaporation of the liquid mass; at least one solid surface is arranged, in part inside the liquid mass and in part outside the liquid mass so as to establish at least a meniscus of the liquid on this solid surface; the shape and/or the size and/or the extension and/or the position and/or the temperature of this meniscus is controlled so that the evaporation of the liquid through said meniscus is controlled; any deposition of these substances is also controlled.

Abstract: The present invention relates to a water purifier having a non-drinkable water inlet (I) and a drinkable water outlet (O1), and comprising at least a boiler (8) having a water inlet and a steam outlet, a fluids separating filter (5) operating by flow and float, having an inlet and an outlet, and a heat exchanger (4) adapted to exchange heat between a first and a second separated fluid flows, having an inlet and an outlet for a first water flow to be heated as well as an inlet and an outlet for a second water flow to be cooled; the non-drinkable water inlet (I) is coupled to the first flow inlet of the heat exchanger (4), the first flow outlet of the heat exchanger (4) is coupled to the inlet of the fluids separating filter (5), the outlet of the fluids separating filter (5) is coupled to the inlet of the boiler (8), the outlet of the boiler (8) is coupled to the second flow inlet of the heat exchanger (4), the second flow outlet of the heat exchanger (4) is coupled to the drinkable water outlet (O1).