A process for the production of legume meal comprising the steps of: a) providing a wet heat treatment reactor comprising a cylindrical tubular body with horizontal axis, having at least one opening (5, 6, 10) for the introduction of a legume meal and water or an aqueous solution and having at least one discharge opening, a heating jacket for raising the temperature of said tubular body to a temperature of at least 80°C, and a rotor arranged inside the cylindrical tubular body and comprising a shaft provided with elements projecting radially therefrom; b) feeding a continuous flow of said meal into said reactor, in which the rotor is rotated at a speed greater than or equal to 150 rpm; c) feeding into said reactor, together with said flow of meal, a continuous flow of water or aqueous solution, which is dispersed into minute droplets; d) centrifuging said flows against the inner wall of the reactor, thus forming a highly turbulent, dynamic, thin tubular fluid layer, in which the meal particles and the droplets of water or aqueous solution are kept mechanically in intimate contact by the radially projecting elements of said rotor, while advancing in substantial contact with said inner wall of the reactor toward the discharge opening; e) discharging from the discharge opening a continuous flow of a wet meal (moisture content 20-40%); f) providing a thermal dehydration and treatment reactor, comprising a cylindrical tubular body with horizontal axis, having at least one inlet opening and at least one discharge opening, a heating jacket for raising the temperature of said tubular body to a predetermined temperature, and a rotor arranged inside the cylindrical tubular body and comprising a shaft provided with elements projecting radially from said shaft; g) feeding said wet meal into said thermal dehydration and treatment reactor through the at least one inlet opening, the inner wall of the reactor being kept at a temperature of at least 100°C by means of said heating jacket and the rotor being rotated at a speed of at least 150 rpm; h) centrifuging and causing said wet meal to advance inside the reactor by the action of said rotor; i) discharging from the discharge opening of the reactor a continuous flow of legume meal having a moisture content of between 2% and 15%. a) providing a wet heat treatment reactor comprising a cylindrical tubular body with horizontal axis, having at least one opening (5, 6, 10) for the introduction of a legume meal and water or an aqueous solution and having at least one discharge opening, a heating jacket for raising the temperature of said tubular body to a temperature of at least 80°C, and a rotor arranged inside the cylindrical tubular body and comprising a shaft provided with elements projecting radially therefrom; b) feeding a continuous flow of said meal into said reactor, in which the rotor is rotated at a speed greater than or equal to 150 rpm; c) feeding into said reactor, together with said flow of meal, a continuous flow of water or aqueous solution, which is dispersed into minute droplets; d) centrifuging said flows against the inner wall of the reactor, thus forming a highly turbulent, dynamic, thin tubular fluid layer, in which the meal particles and the droplets of water or aqueous solution are kept mechanically in intimate contact by the radially projecting elements of said rotor, while advancing in substantial contact with said inner wall of the reactor toward the discharge opening; e) discharging from the discharge opening a continuous flow of a wet meal (moisture content 20-40%); f) providing a thermal dehydration and treatment reactor, comprising a cylindrical tubular body with horizontal axis, having at least one inlet opening and at least one discharge opening, a heating jacket for raising the temperature of said tubular body to a predetermined temperature, and a rotor arranged inside the cylindrical tubular body and comprising a shaft provided with elements projecting radially from said shaft; g) feeding said wet meal into said thermal dehydration and treatment reactor through the at least one inlet opening, the inner wall of the reactor being kept at a temperature of at least 100°C by means of said heating jacket and the rotor being rotated at a speed of at least 150 rpm; h) centrifuging and causing said wet meal to advance inside the reactor by the action of said rotor; i) discharging from the discharge opening of the reactor a continuous flow of legume meal having a moisture content of between 2% and 15%.