How to ensure high vacuum degree in disc dryer

 The disc dryer process is suitable for drying thermosensitive materials with very low temperature requirements, such as pharmaceuticals, vitamins, biological products, enzymes, solvent containing materials, etc. Wet materials are added in batches to a quantitative feeder that can withstand negative pressure. After turning on the vacuum pump to put the disc dryer in a negative pressure state, the materials are evenly added to the dryer through a continuous lock for drying operations. The dried materials are discharged from the discharge port at the bottom of the dryer. The moisture escaping from the material is recovered through the condenser and solvent receiving tank, and the entire operation process is carried out under negative pressure.

The material enters the feeding hopper 1, and the pneumatic ball valves a and d are opened simultaneously. The material in the feeding hopper 1 enters the feeding transition bin 1, while the material in the feeding transition bin 2 enters the dryer under the action of the mixing device. The pneumatic ball valves a and d are closed at the same time, and the pneumatic ball valves b and c are opened at the same time. The material in the feeding hopper 2 enters the feeding transition bin 2. At the same time, the material in the feeding transition bin 1 enters the dryer under the action of the mixing device. This process is repeated, and the wet material continuously enters the top drying disc of the dryer.