Steam spiral sludge dewatering machine

The utility model relates to a steam spiral sludge dewatering machine in the field of sewage treatment equipment. The steam spiral sludge dewatering machine comprises a spiral extrusion chamber; one end of the spiral extrusion chamber is provided with a sludge inlet device and the other end of the spiral extrusion chamber is provided with a sludge discharge device; a closed shell is arranged on the outer circumference of the spiral extrusion chamber; the lower side of the spiral extrusion chamber is provided with filtrate collection funnels; and a steam heating system is arranged in the spiral extrusion chamber. By using the steam spiral sludge dewatering machine, the sludge is dewatered and dried at one time, so the equipment investment number is reduced, floor space is saved, material transfer is reduced, and the steam spiral sludge dewatering machine is particularly suitable for one-time deep dewatering of a large treatment amount of sludge.