Sludge pyrolysis and hydrogenation utilization method and device

The invention relates to a sludge pyrolysis and hydrogenation utilization method and device, and provides a sludge pyrolysis and hydrogenation utilization method. The method comprises the following steps: (i) dewatering sludge with the water content of 70%-90% to obtain dewatered sludge with the water content of 20%; (ii) pyrolysing the dewatered sludge obtained in the step (i) in an oxygen-free atmosphere, at the temperature of 300 DEG C-600 DEG C, so as to obtain a sludge pyrolysis oil, a combustible gas phase product and a solid product, wherein the obtained sludge pyrolysis oil is subjected to oil-water separation to obtain pretreated biological oil which is used for catalytic hydrogenation refining; and (iii) carrying out catalytic hydrogenation refining: namely at 150 DEG C-350 DEG Cunder the pressure of 6-14 MPa, the pretreated biological oil obtained in the step (ii) is subjected to hydrogenation and heavy metal removal, hydrogenation and deoxygenization, hydrogenation and denitrification, hydrogenati