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.
Transcript of Solids drying
Koncept Learning [email protected]
Solids Drying
Purpose of Solids Drying
Increasing Shelf Life
Enhancing Calorific Value of Fuel
Reducing Down Transportation Cost
Koncept Learning [email protected]
Solids Drying
Drying Process
Solid + Liquid
To Vapor by Heat Step-1
Step-2
Removal of Vapor from Solid’s Place
Koncept Learning [email protected]
Solids Drying
Dryer Types
Continuous Dryers• Continuous-Tray Dryers, Continuous Sheeting
Dryers, Pneumatic Conveying Dryers, Rotary
Dryers, Spray Dryers, Through - Circulation
Dryers, Tunnel Dryers, Fluid Bed Dryers
Batch Dryers• Batch - Through Circulation Dryers, Tray and
Compartment Dryers, Fluid Batch Dryers
Continuous Dryers• Cylinder Dryers, Drum Dryers, Screw-
Conveyor Dryers, Steam-Tube Rotary
Dryers, Vibrating - Tray Dryers
Batch Dryers• Agitated Pan Dryers, Freeze Dryers, Vacuum
Rotary Dryers, Vacuum Tray Dryers
Direct Contact Indirect Contact
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Solids Drying
Trouble Shooting
Material degradesHigh drying timeReduced particle sizeHigh moisture in dried solidsMaterial not fluidizingSurface shrinkage
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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
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For Training Workshop
Write us at : [email protected]
Solids Drying
T, Time
dw/dT
Drying Rate A
B C
D
AB - Warming up period
BC - Constant Rate Period
‘C’ - Critical Moisture Content
CD - Falling Rate Period
