RTO waste heat utilization system for printing device

The utility model relates to an RTO waste heat utilization system for a printing device. The problems that in the prior art, a printing machine is low in waste heat utilization rate and pollutes air are solved. The device comprises a waste heat introducing pipeline for introducing high-temperature waste gas treated by an RTO combustion chamber into a printing device, a normal-temperature air inlet is formed in the waste heat introducing pipeline, and a valve for adjusting the inlet amount of fresh air is arranged at the normal-temperature air inlet; the two ends of the air mixing area communicate with the waste heat introduction pipeline and the printing device correspondingly, high-temperature waste gas and fresh air are mixed through the air mixing area, and a first temperature control sensor for measuring the temperature of mixed airflow is arranged in the air mixing area. The drying and heating device has the advantages that continuous drying and heating of the printing device are achieved, the purposes o