Drying device of ACR spray drying tower

The invention belongs to the technical field of spray drying, and discloses an ACR spray drying tower drying device which comprises a supporting shell and a monitoring assembly, an air inlet groove is formed in the top end of the supporting shell, a heating device is fixedly installed at the right end of the air inlet groove, and a discharging device is fixedly installed at the left end of the supporting shell. And a feeding device is fixedly mounted at the top end of the supporting shell. Hot air generated by a heating device is sucked into a rotating box through an air inlet assembly, an air spraying pipe is driven to rotate through meshing of a gear and a gear ring, the hot air sprayed out of the air spraying pipe can form complete and uninterrupted airflow, and the rotating assembly is driven by a driving assembly to rotate in an inner cavity of a drying cylinder; and hot air making contact with the raw materials is driven to rotate, then the hot air and the raw materials rotate and move downwards in the