Drying

Question 1

Drying

Answer 1

Transfer of liquid from a wet solid into an unsaturated gas phase

Question 2

Tray Dryers

Answer 2

*Batch dryer
*Smallest capacity for lab purposes

Question 3

Freeze Dryers

Answer 3

*Lyophilization
*Heat sensitive
*Low P = Moisture is frozen then sublimates

Question 4

Conveyor and Tunnel Dryers

Answer 4

Used to dry sheets

Question 5

Particulate Dryers

Answer 5

Rotary Dryer
Plate Dryer
Flash Dryer

Question 6

Spray Dryers

Answer 6

To produce fine powders for dilute solutions, slurries, gel, or emulsions

Question 7

Used to dry pastes and slurries

Answer 7

Rotary Vacuum Dryer
Drum Dryer

Question 8

Tower Dryer

Answer 8

*Palay, wheat, grains
*Wet feed in top falls while in contact with hot air

Question 9

A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?

Answer 9

Spray dryer

Question 10

Centrifugal Dryer

Answer 10

*Water more dense than porous solids
*Salt, Sugar, Fertilizer

Question 11

Large scale drying of wheat is done in a __________ dryer.

Answer 11

spouted bed

Question 12

Large scale drying of sugar is done in a __________ dryer.

Answer 12

rotary