The double cone rotary vacuum dryer is a widely-used equipment in the production of active pharmaceutical ingredients.

Overall, China's drying equipment industry has entered a more mature phase, better able to meet the actual needs of users across various fields. However, at this stage, the revolution of Chinese vacuum dryers has not yet been successful. The importance of drying equipment in the pharmaceutical industry is gradually increasing.


Especially, the demand for vacuum freeze-drying equipment for large-scale and multi-functional combination equipment is increasing. Relevant enterprises should carry out comprehensive and multi-level energy-saving technology transformation to achieve catch-up.


The Bi-conical rotary vacuum dryer is a widely-used equipment in the production of raw pharmaceutical materials. Its reason lies in the vacuum drying process where the pressure inside the cylinder is always lower than atmospheric pressure, resulting in fewer gas molecules, lower density, and reduced oxygen content. This enables the drying of drugs that are prone to oxidation and change, minimizing the chance of bacterial contamination of the material. Additionally, the temperature of water during the vaporization process is directly proportional to the steam pressure.


Therefore, during vacuum drying, moisture in the material can evaporate at low temperatures, achieving low-temperature drying, which is particularly suitable for the production of thermosensitive materials in drugs. Simultaneously, vacuum drying can eliminate the phenomenon of surface hardening that often occurs during atmospheric pressure hot air drying, which is due to the larger internal surface pressure difference of the vacuum-dried material. Under the action of pressure gradients, moisture rapidly moves to the surface without causing surface hardening.


The twin cone rotary vacuum dryer, functionally, is a drying equipment that integrates mixing and vacuum drying. Due to its simplicity, convenience, and dual-effect features, it serves as a classic unit with practicality and cost-effectiveness, making it difficult to be replaced by other equipment.