Apparatus for the continuous crystallization of sugar

An apparatus for the continuous crystallization of sugar, formed by a longitudinally horizontal tank with separate, longitudinal, liquid heating and circulation zones in open communication with a common vapor zone, said heating zone containing a heat exchanger having vertically disposed pipes to induce upflow of liquid and other zone thermally isolated from said exchanger and not heated, liquid supply circuits being provided along the tank, a liquid overflow shoot at its exit to withdraw concentrated liquid therefrom and maintain a preset liquid level within said tank, and transverse walls in the vapor zone of the tanks above the heat exchangers, these walls extending below the level of liquid within said tank.