The utility model relates to a granulating and
drying device which comprises a shell with an opening in the upper end and a top cover, an installation cavity is formed in the bottom of the shell, an
air heater is arranged in the installation cavity, an air outlet of the
air heater is connected with an air guide disc, an air guide outer
barrel and an air guide inner
barrel which are communicated with the interior of the air guide disc are arranged on the air guide disc, and an inner air hole is formed in the air guide outer
barrel. An outer air hole is formed in the air guide inner cylinder, a
drying cavity is formed between the air guide outer cylinder and the air guide inner cylinder, hot air can be evenly sprayed into the
drying cavity, the drying effect is improved, a feeding
pipe is rotationally arranged on the top cover, an
exhaust pipe is arranged in the feeding
pipe in a sleeved mode, a feeding channel is arranged between the feeding
pipe and the
exhaust pipe, and a spiral piece fixed to the inner wall of the feeding pipe is arranged between the feeding pipe and the
exhaust pipe. And the bottom end of the exhaust pipe extends to the position below the feeding pipe, and the inner wall of the exhaust pipe is provided with an inner ring groove protruding in the axis direction of the exhaust pipe, so that the
utilization rate of
heat energy is increased, particles entering the drying cavity are preheated, water drops in wet air are prevented from flowing back and being absorbed by the particles, and the drying effect is further improved.