Three drum dryer features: the latest energy-saving technologies individually mosaic structure. The inner tube, the tube and the outer tube to form a holding structure. Special thermal design philosophy, to reduce heat loss. Increasing the heat exchange area and unit volume evaporation intensity. Enable enhanced utilization of geothermal energy, thermal efficiency is 2.3 times the single cylinder dryer, fuel consumption is only 40% of the consumption needs of single cylinder, smaller footprint, reduced investment in customer base plant. A variety of fuels suitable coal, oil, gas, etc., customers are free to choose according to their own circumstances. Purpose: biomass fuel plants, energy plants, feed mill, organic fertilizer plants, chemical plants and other large and small businesses.