Double-cone rotary vacuum dryer is a drying equipment that integrates mixing and vacuum drying. The process of vacuum drying is to place the dried material in a sealed cylinder, use a vacuum system to vacuum and continuously heat the dried material, so that the moisture inside the material can diffuse to the surface through pressure difference or concentration difference. Water molecules (or other non-condensable gases) gain enough kinetic energy on the surface of the material, overcome the mutual attraction between the molecules, and then diffuse into the low-pressure space of the vacuum chamber, and are pumped away by the vacuum pump to complete the separation from the solid.

Double cone rotary vacuum dryer has the following characteristics:

(1)During the vacuum drying process, the pressure in the cylinder is always lower than the atmospheric pressure, and the number of gas molecules is small, the density is low, and the oxygen content is low, so it can dry easily oxidized drugs and reduce the chance of material contamination.

(2)Since the temperature of moisture is proportional to the steam pressure during the vaporization process, during vacuum drying, the moisture in the material can be vaporized at low temperatures to achieve low-temperature drying, which is especially suitable for the production of pharmaceuticals with heat-sensitive materials.

(3)Vacuum drying can eliminate the surface hardening phenomenon easily caused by atmospheric hot air drying. This is because the pressure difference between the inside and the surface of the vacuum dried material is large. Under the action of the pressure gradient, moisture quickly moves to the surface, and surface hardening will not occur.

(4)Because the temperature gradient between the inside and outside of the material is small during vacuum drying, the moisture can move and collect alone due to reverse osmosis, effectively overcoming the separation phenomenon caused by hot air drying.

2000L Rotary Double Cone Vacuum Drying Machine