Three layer efficient energy-saving rotary drum dryer, based on the tradition high moisture content dryer and improved by our company after absorbing international advanced technology , is a kind of modern high efficient and energy-saving rotary drum dryer. This technology has reached the international advanced level now through melioration, which can process not only low viscosity and high moisture content material but also those high viscosity materials. This machine is suitable for drying a variety of lees and residue materials which moisture content is less than 85%, such as brewery grains, alcohol lees, marc, dregs, starch pulp, livestock manure, slaughter waste etc, it get excellent effect to open up feed resource ,reduce feed cost and phase down environmental pollution.