Deep dehydration device and deep dehydration method for organic materials

The invention relates to a deep dehydration device and deep dehydration method for organic materials and belongs to the field of sludge treatment. The deep dehydration device and the deep dehydration method are used for realizing the deep dehydration of organic granular materials. The deep dehydration method for the organic materials comprises the following steps: (a) carrying out pretreatment: stirring the organic granular materials, and adjusting the additive, moisture content and temperature of the organic granular materials; (b) carrying out thermal hydrolysis: putting the organic granular materials pretreated in the step (a) into a hydrolysis tank, carrying out thermal hydrolysis on the organic granular materials so as to destroy sticky organic substances outside granules of sludge or mud materials and liberate biochemical water organic matters contained in the granules, and thus, hydrolyzing the biochemical water organic matters contained in the granules; (c) carrying out thermal oxidation: putting a thermal hydrolysis product obtained in the step (b) into an oxidation tank, and carrying out thermal oxidation on the thermal hydrolysis product so as to release biochemical water; (d) carrying out solid-liquid separation: dehydrating a product obtained in the step (c), wherein after dehydration, a solid substance can be directly recovered as a solid organic fertilizer, and a liquid substance can be concentrated and oxidized as a liquid organic fertilizer.