Sludge dehydration device and dehydration method

The sludge dewatering device comprises a box body and a dewatering barrel body, a cover body is arranged at the top of the box body, a compression assembly is installed at the bottom of the cover body, an opening is formed in the top of the dewatering barrel body, and a plurality of dewatering holes are formed in the side wall of the dewatering barrel body; and a rotating table is installed at the bottom of the dewatering barrel body, and the bottom of the rotating table rotationally penetrates out of the box body through a sealing bearing and is connected with a second motor. The sludge dewatering device is simple in structure and convenient to operate, the movable disc moves to compress sludge while the dewatering barrel rotates to dewater the sludge, and the dewatering effect is effectively improved. According to the dewatering method based on the sludge dewatering device, different compression processes can be carried out according to sludge with different water contents, the dewatering efficiency is impr