Rotary vacuum paddle dryer/rvpd gives drying, Mixing and breaking effects simultaneously rotary vacuum paddle dryer / rvpd dryer features a tubular design vessel featuring an ample diameter hollow shaft. The jacket or limpet coil provided for heating the cylindrical shell. The shaft is attached with hollow paddles provided with specially designed scraper blades, Which scrap the entire internal outer layer of the dryer and continuously move and rotate the material thereby precluding the possibility of material remaining in contact with a hot surface for protracted periods of time. Evaporation of moisture takes place under vacuum and vapors passes through the dust catcher into the condenser, In the area it occupies condensed and collected in the receiver. Dried material is discharged through discharge valve.