At present, the double cone rotary vacuum dryer has also entered into the field of plastic processing, continuous operation of the machine is composed of three installed on the conveyor belt to the rotating cavity. In the first cavity, when the particles are filled, the gas heating and drying temperature to heat the particles. In the gas outlet, when the material reach the drying temperature is moved to the pumped into the second cavity in a vacuum. Because the vacuum lowers the boiling point of water, so water is easier to be evaporated into steam, therefore, the moisture diffusion process is accelerated. The presence of vacuum, and in between particles within and surrounding air have a greater pressure difference. In general, the residence time of material in the second cavity in the 20min? 40min, and for some strong hygroscopicity material, most need to stay 60min. Finally, the material is sent to the third cavity, and then removed from the double cone rotary vacuum dryer.
In the desiccant air drying and vacuum drying, the consumption of heating plastic energy is the same, because these two kinds of methods is carried out in the same temperature. But in the vacuum drying, drying the gas itself does not need to consume energy, but it takes energy to create a vacuum, vacuum required to create the energy consumption and the dry material weight and moisture of the.
Double cone rotary vacuum dryer in airtight interlayer into thermal energy (such as hot water, low pressure, steam or thermal oil), oil heat, double cone rotary vacuum dryer adopts automatic constant temperature control, can dry the biochemical products and mineral raw materials, temperature is between 20 ~ 160 ℃. High thermal efficiency, increased more than 2 times than the general oven. Heat the inner shell to dry materials. Under driving of power, double cone rotary vacuum dryer vessel rotated slowly, mixing tank material constantly, so as to strengthen the purpose of drying. Double cone rotary vacuum dryer indirect heating, the material can not be polluted, conform to "GMP" standard. Equipment repair operation is simple, easy to clean. The material in the vacuum state, the vapor pressure drops to the material moisture (solvent) saturated and evaporation, and the vacuum pump to discharge recovery. The material internal moisture (solvent) continue to surface infiltration, evaporation, discharge, three ongoing process, material to achieve the purpose of drying in a very short period of time. |
