Sludge fermentation device with spiral structure

The invention provides a sludge fermentation device with a spiral structure, which comprises a fermentation tank, a material port, a groove, a sealing cover A, a discharge port and a star-shaped discharge valve, the material port is embedded in the upper part of the fermentation tank, the discharge port is embedded in the lower part of the fermentation tank, the star-shaped discharge valve is embedded in the upper part of the interior of the discharge port, the groove is embedded in the side of the fermentation tank, and the sealing cover A is arranged in the groove. According to the sludge fermentation device disclosed by the invention, fermentation bacteria liquid repeatedly extrudes a non-return stop block to drive a telescopic rod and an outer side spring to repeatedly stretch out and draw back, so that the fermentation bacteria liquid is sprayed into surrounding sludge from a plurality of spray holes surrounding the periphery of a spray head in a large range; the rotating pushing blades are in repeated c