The present invention relates to a processing device to the hot water, of vegetable material comprising a primary circuit (1), comprising a tank (2) of immersion of the plant material, in which there flows a water treatment, a heating unit (16) of a heat-transfer fluid circulating in a secondary circuit (15)； a heat exchanger (13) for the heating of the water treatment with the heat transfer fluid of the secondary circuit (15) and a unit for measuring and regulating (18) of the temperature of the water, connected with the primary circuit (1) and the heating unit (16).
