With the development of pharmaceutical and chemical industry production, in order to adapt to the medium-sized scale refining of various antimicrobial agents, crystals or other granular materials drying, the design of double cone rotary vacuum dryer.

　　The dryer body in the middle of the cylindrical, conical at both ends, the top of the cone is set up inlet and manhole, body inside and outside is divided into three layers, the middle jacket heating medium can be hot water circulation or steam, the outer layer of rock wool, insulation effect is very good, very little energy consumption, the inner layer of the material put in the vacuum conditions of the rotary drying, the material is flipped side by side through the wall of the material to obtain the heat, accelerate the drying, so as to avoid the material drying the surface of the yellow phenomenon, greatly shorten the material drying time, only a few minutes, and the drying time will be reduced by a few minutes. Phenomenon, greatly shorten the material drying time, only similar materials in the vacuum oven in the drying time required about 2 / 3, improve labor productivity. It is especially suitable for the drying of materials with the danger of being oxidized and heat-sensitive materials, and it can show its superiority even more when it doesn't destroy the crystalline materials in the process of drying, the materials with strict metal ions and the materials that require the discharge of volatiles (or poisonous substances) to be recovered (or toxic).

　　The dryer is easy to operate, convenient in and out of the material, greatly reducing the labor intensity of workers, but also reduces the material in the drying process by the environmental pollution, improve product quality, in line with the drug management standard “GMP” requirements.