The use of aerodynamic distributor at the furnace top is reliable with simple structure.
Drying area is increased with two drying beds up and down. Drying bed with air screen and fixed screen which can separate most of the powder and return fines in advance and discharge them out of the furnace.
The crater and the combustion chamber are located inside of the furnace; burning from inner to outside, making the airflow and temperature distribution tend to be uniform and reasonable in the entire roasting zone.
The combustion chamber, roasting zone, drying zone and anti-over-wet zone can be detected and controlled independently by computer.
Cooling capability insider the furnace is higher .Therefore the average discharging temperature of the pellet can be reducedbelow 300℃.
Variable frequency ring discharger controlled by the top of furnace can well cooperates with discharging.