Solids Drying

Koncept Learning Center
klcenter@gmail.com
Solids Drying

Purpose of Solids Drying
Increasing Shelf Life
Enhancing Calorific Value of Fuel
Reducing Down Transport...
Solids Drying

Drying Process
Step-1

Solid + Liquid

To Vapor
by Heat

Step-2

Removal of Vapor from Solid’s Place
Koncep...
Solids Drying

Drying Process
Moisture

Feed

Dryer

Dry Solid

Heat
Koncept Learning Center
klcenter@gmail.com
Solids Drying

Feed Stock
Wet Solids
Slurry
Solution
Suspension
Koncept Learning Center
klcenter@gmail.com
Solids Drying

Dryer Types
Direct Contact

Indirect Contact

Continuous Dryers

Continuous Dryers

•Continuous-Tray Drye...
Solids Drying

Industrial Dryers

Koncept Learning Center
klcenter@gmail.com
Solids Drying

Trouble Shooting
Material degrades
High drying time
Reduced particle size
High moisture in dried solids...
Solids Drying

Challenges
Feed Stock
 Fry Drying

Energy Economy
 Indirect heating with small cross flow air

New Tre...
Solids Drying
B

Drying
Rate

C
AB - Warming up period

A

BC - Constant Rate Period

dw/dT

‘C’ - Critical Moisture Conte...
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Solids drying

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Drying of solids is mix of science and art. Dryers are developed to suit the feed stock/ product requirements. Energy is one of the major issue while designing and operating solids drying units.

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Solids drying

  1. 1. Solids Drying Koncept Learning Center klcenter@gmail.com
  2. 2. Solids Drying Purpose of Solids Drying Increasing Shelf Life Enhancing Calorific Value of Fuel Reducing Down Transportation Cost Koncept Learning Center klcenter@gmail.com
  3. 3. Solids Drying Drying Process Step-1 Solid + Liquid To Vapor by Heat Step-2 Removal of Vapor from Solid’s Place Koncept Learning Center klcenter@gmail.com
  4. 4. Solids Drying Drying Process Moisture Feed Dryer Dry Solid Heat Koncept Learning Center klcenter@gmail.com
  5. 5. Solids Drying Feed Stock Wet Solids Slurry Solution Suspension Koncept Learning Center klcenter@gmail.com
  6. 6. Solids Drying Dryer Types Direct Contact Indirect Contact Continuous Dryers Continuous Dryers •Continuous-Tray Dryers, Continuous Sheeting •Cylinder Dryers, Pneumatic Conveying Dryers, Rotary Conveyor Dryers, Spray Dryers, Through - Circulation Dryers, Vibrating - Tray Dryers Dryers, Dryers, Drum Dryers, Screw- Steam-Tube Rotary Dryers, Tunnel Dryers, Fluid Bed Dryers Batch Dryers Batch Dryers •Batch - Through Circulation Dryers, Tray and •Agitated Compartment Dryers, Fluid Batch Dryers Vacuum Rotary Dryers, Vacuum Tray Dryers Pan Dryers, Koncept Learning Center klcenter@gmail.com Freeze Dryers,
  7. 7. Solids Drying Industrial Dryers Koncept Learning Center klcenter@gmail.com
  8. 8. Solids Drying Trouble Shooting Material degrades High drying time Reduced particle size High moisture in dried solids Material not fluidizing Surface shrinkage Koncept Learning Center klcenter@gmail.com
  9. 9. Solids Drying Challenges Feed Stock  Fry Drying Energy Economy  Indirect heating with small cross flow air New Trends  Microwave Vacuum Drying Product Constraints  Spray Freeze Drying Koncept Learning Center klcenter@gmail.com
  10. 10. Solids Drying B Drying Rate C AB - Warming up period A BC - Constant Rate Period dw/dT ‘C’ - Critical Moisture Content CD - Falling Rate Period D T, Time For Training Workshop Write us at : klcenter@gmail.com Koncept Learning Center klcenter@gmail.com

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