Double cone rotary vacuum dryer is composed of refrigeration system, vacuum system, heating system, electric instrument control system. The main components of drying chamber, condenser, chiller, vacuum pump, heating / cooling device. The working principle is to be dry goods to freeze to the triple point temperature below, then the solid water in articles under vacuum conditions (ice) to sublimate directly into water vapor, excluded from the goods, the goods dry. Material is fed into the pre treated by freezing, frozen storage, and then into the drying chamber sublimation dehydration, after disposal workshop packaging. Vacuum system low pressure conditions for the sublimation drying chamber, the heating system with latent heat of sublimation to material, refrigeration system to provide the required cooling capacity to the cold trap and a drying chamber. Equipment with high performance radiation heating, uniform heating of materials; efficient collector water well used, and can realize fast defrosting; using high vacuum unit, and can realize the separation of oil and water; the parallel central refrigerating system, multi-channel cooling on demand, stable operation, good energy saving; the artificial intelligence control, high control accuracy, convenient operation.
Double cone rotary vacuum dryer, the cylinder pressure is always lower than the atmospheric pressure, less number of gas molecules, low density, low oxygen content, thus drying easy oxidation of drugs, reduce material contamination opportunity. Due to the moisture in the vaporization process temperature and steam pressure is proportional to, so the vacuum drying at low temperature, moisture can be vaporized material, low temperature drying, especially suitable for heat sensitive materials in pharmaceutical production. Vacuum drying can eliminate surface hardening phenomenon caused by the atmospheric pressure hot air drying, this is because the material of vacuum drying and surface pressure, the pressure gradient effect, water quickly move to the surface, no surface hardening.
Double cone rotary vacuum dryer during vacuum drying, cylinder pressure is below atmospheric pressure state, the molecules of a gas quantity, density and low oxygen content, convenient drug oxidation drying, reduces the chance of material contaminated bacteria. Vaporization of water in the state of temperature and vapor pressure is proportional to, so in the vacuum drying, the moisture content of materials at low temperature state only can vaporize, achieve the purpose of drying, heat sensitive materials and drug production. Vacuum drying can prevent the material surface hardening phenomenon caused by the atmospheric pressure hot air drying, vacuum drying of the material inside and outside pressure difference, the pressure gradient, water can quickly move to the surface, not the appearance of hardening. The material in a double cone rotary vacuum dryer vacuum drying condition, material inside and outside temperature gradient decreases, the resulting reverse osmosis in solvent which can move independently and collect. |
