Hybrid drying apparatus for high or medium viscosity materials

A hybrid drying apparatus comprising:

• a bed portion having a horizontally disposed top surface;
• an object-to-be-dried supplying portion configured to spread an object to be dried on the top surface of the bed portion;
• a driving unit configured to rotate the bed portion or the object-to-be-dried supplying portion, wherein the object to be dried supplied from the object-to-be-dried supplying portion is spread on the top surface of the bed portion while the bed portion or the object-to-be-dried supplying portion is rotated by the driving unit;
• a scraping unit disposed on the bed portion and configured to remove the object to be dried when the object to be dried is dried on the top surface of the bed portion from the top surface of the bed portion;
• a lower jacket configured to cover a bottom surface of the bed portion and form a space portion for a flow of hot air between the bottom surface of the bed portion and the lower jacket and having a first inlet through which the hot air is introduced into the space portion and a first outlet through which the hot air is discharged to an outside of the space portion;
• and
• an upper cover portion configured to cover a section of the top surface which is coated with the object to be dried and form an upper space for the hot air on the top surface of the bed portion, the upper cover portion having a second inlet through which the hot air is introduced into the upper space and a second outlet through which a discharge gas generated from the object to be dried coated on the top surface during drying is discharged, wherein the second inlet is connected to the first outlet,
• wherein the hot air introduced into the space portion of the lower jacket heats the bottom surface of the bed portion to transfer heat to the object to be dried on the top surface on the bed portion without the contacting the object to be dried, and then the hot air discharged from the space portion of the lower jacket through the first outlet is introduced into the upper space of the upper cover portion through the second inlet and heat directly the object to be dried on the top surface of the bed portion.