Anaerobic fermentation equipment for sludge treatment

The utility model relates to the technical field of sludge treatment, in particular to anaerobic fermentation equipment for sludge treatment, which comprises a tank body and a connecting pipe, a tank cover is mounted on the surface of the tank body, a water inlet pipe is communicated with the surface of the tank cover, an air outlet pipe is communicated with the surface of the tank cover, and a blow-off pipe is communicated with the surface of the tank body. A plurality of supporting legs are fixedly connected to the surface of the tank body, a limiting structure is arranged on the surface of the blow-off pipe and comprises a circular ring, the circular ring is fixedly connected with one end of the blow-off pipe, a lantern ring is fixedly connected to the surface of the connecting pipe, and the size of the arc surface of the circular ring is matched with the size of the inner wall of the lantern ring. And a plurality of grooves are formed in the surface of the circular ring, springs are fixedly connected to t