Heat pump technology features: (2) energy costs low - heat pump drying device can be recovered in the operation of sensible and latent heat humid air, adequate and rational use of energy, energy-efficient than electric heating tube for more than 40% over the boiler heating energy by more than 50%, which is a recognized energy-efficient equipment. (3) do not pollute the environment - the whole process because of the heat pump drying is carried out in a closed system without humidity to the surrounding environment, but also the emission of noxious, smelly gas. If access to material systems are all closed in the pipeline, the entire operation will keep the environment clean. This is compared with other drying methods is a unique advantage. Good (4) drying quality - heat pump dryers in drying medium is circulating in a closed space; free from outside influence of climatic conditions, are running smoothly throughout the year under the same conditions, so a good dry mass (5) Indirect closed heating, green energy, reduce material loss. (6) investment, small footprint, supporting a small civil engineering (7) dry moisture control, the minimum up to 10% or less (8) heat stable, greatly reducing maintenance costs (9) proved a lot of success stories, high temperature heat pumps in industry Most areas can replace traditional boilers and electric heating pipe