Underjet blanking granulator

The utility model relates to an improved granulating device, in particular to a granulating device provided with materials are inlet by the lower part of a spray head. The materials can be totally returned to a stock chest. The bore of the spray head can not be clogged under the function of materials returned negative pressure. The spray head is fixed at the center of an air inlet by a back plate and a bolt and arranged at a feeding pipe under the spray head. The sphere bore plate of the spray head, a filter seat and a temperature tube are welded into an integration. A tower cleaning device is arranged in the granulating tower. The materials are discharged by the bottom of the tower and packed after being cooled by an internal spiral cooling roller. The continuous production of granulation is implemented by the utility model and the operation is more convenient.