Question

Examples of continuous shelf moving dryer are

• A. Vacuum dryer
• B. Tray dryer
• C. Spray dryer
• D. Turbo tray dryer

Hint:

Continuous dryers enhance productivity by allowing non-stop operation and uniform drying with reduced processing time.

Answer 1

The Correct Option is D

Drying is an essential unit operation in pharmaceutical manufacturing to remove moisture from solid and semi-solid dosage forms. Dryers can be classified as batch or continuous based on operation. - Continuous shelf moving dryers involve a continuous movement of trays or shelves through the drying chamber, allowing for uninterrupted drying of materials. - Turbo tray dryer is an example of a continuous shelf moving dryer where trays holding the product move continuously or intermittently through heated air streams. This design improves drying efficiency by combining convection drying with movement. - Other dryers like vacuum dryer and tray dryer generally operate in batch mode, while spray dryers are used for drying liquids into powders through atomization. Thus, turbo tray dryer is the correct example of a continuous shelf moving dryer commonly used in pharmaceutical drying processes.