(1) Structure: The drum dryer consists of 1. a cylinder body; 2. Front roller
ring; 3. Rear roller ring; 4. Gear; 5. Stop roller; 6. Trailing
roller; 7. Pinion gear; 8. Discharge section; 9. Lifting plate; 10.
Reducer; 11. Motor; 12. Hot air duct; 13. Feed chute; 14. The
composition of the furnace body and other parts can also be
designed according to user needs, such as gas generator, combustion
chamber or supporting elevators, belt conveyors, quantitative
feeders, cyclone dust collectors, induced draft fans, etc. (2) Working principle of drum dryer: It is to transport the wet material to be dried from the belt
conveyor or bucket elevator to the hopper, and then enter the
feeding end through the feeding pipeline through the feeding
machine of the hopper. The slope of the feeding pipeline should be
greater than the natural inclination angle of the material, so that
the material can flow smoothly into the dryer. The dryer cylinder
is a rotating cylinder that is slightly inclined to the horizontal
line. The material is added from the higher end, and the heat
carrier enters from the lower end, forming a countercurrent contact
with the material. There are also heat carriers and materials
flowing together into the cylinder. As the cylinder rotates, the
material is subjected to gravity and moves to the lower end. During
the forward movement of wet materials in the cylinder, the heat is
directly or indirectly supplied by the heat carrier, allowing the
wet materials to dry and then sent out through a belt conveyor or
screw conveyor at the discharge end. There is a plate installed on
the inner wall of the cylinder, which is used to pick up and
scatter the material, increasing the contact surface between the
material and the airflow, in order to improve the drying rate and
promote the material to move forward. Heat carriers are generally
divided into hot air, flue gas, etc. After the heat carrier passes
through the dryer, a cyclone dust collector is generally required
to capture the materials carried in the gas. If it is necessary to
further reduce the dust content in the exhaust gas, it should also
be discharged after passing through a bag filter or wet dust
collector.