Modular design, installation and maintenance, maintenance and conversion convenience; motor speed electromagnetic or frequency control high precision, long life, with sieve, in addition to materials, reduce heat loss; drying cylinder driven by a single motor gear, smooth drive, low vibration ,low noise. Copy plate design unique, in the total heat exchanger, high thermal efficiency, the use of water film dust, in line with environmental requirements. To coal as fuel, reduce costs 50-80%. This product has a variety of series for users to choose.