TSI Direct Contact Rotary
Single-Pass-Recycle Dryer System
95% of Biomass Dryer Systems in North America are Direct Contact
Rotary Dryers
Rotary Single-Pass-Recycle Dryer System characteristics:
Low operating costs, low maintenance costs, and high uptime
Single Pass ensures Gas Classification Particle Drying
Recycle minimizes emissions and improves energy efficiency
High production capacities
Design flexibility
Quick deliveries, installations, and ramp ups
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
95% of Biomass Dryer Systems in North America are
Direct Contact Rotary Dryers
• Weyerhaeuser (World’s largest forest product company)
• Georgia Biomass (World’s largest Pellet Plant)
• Louisiana Pacific Corporation (World’s largest OSB producer)
• Kior (biomass to biofuels company)
• Green Circle (World’s second largest Pellet Plant)
• JM Huber (multinational supplier of engineered materials)
• Georgia Pacific Corporation (operates World’s largest OSB plant)
• SmartPly Europe (Europe’s producer of OSB products)
• Masisa (major supplier of engineered wood products in South
America)
Low Operating & Maintenance Costs
and High Uptime
• Rotary Dryer Systems utilize low gas flow thus minimizing Brake Horse
Power exerted by its Induced Draft Fan
• Four motors run the Dryer System
• Annual maintenance costs low
• Typically Rotary Dryer Systems operate around 95% of the time
Gas Classification Particle Drying
Wet
Material
AVG.. DWELL
Low Velocity 9-15 Min.
Gas
5-9 Min.
1- 5 Min.
• Roseburg Forest Products (Dillard, OR)
– Originally six 8’ diameter 3-Pass Drums:
• 3 Drums drying shavings rom 50% to 3% moisture content wet-weight-basis
• 3 Drums drying sawdust from 35% to 3% moisture content wet-weight-basis
• Single 18’ diameter Drum:
– Drying both shavings and sawdust from 50% & 35% respectively to 3%
moisture content wet-weight-basis
Roseburg Forest Products (Dillard, OR)
Recycle System
• Typically recycles 50% of Dryer System exhaust flue gas and up to
75% depending on Dryer Drum design inlet temperatures
• Improves energy efficiency by 25%
• Lowers emissions and size of Pollution Control Equipment (if
required)
• Increases humidity of the drying gas thus providing for better
conditioning of the biomass
• Reduces oxygen level within the Dryer System thus minimizing
sparks carried over from the Heat Energy System
Hot Gas
Requires 25% Less Heat
Typical Recycle System
High Production Capacities
• TSI Rotary Single-Pass-Recycle Dryer Systems can handle various
production capacities and some of the highest production capacities
in the world.
• Currently TSI Dryer Systems handle anywhere between 1 ton/hr up to
60 tons/hr for a single Dryer System when drying from 50% moisture
content to 3% moisture content wet-weight-basis
– Rotary Dryer Systems are easily scalable
– Modular construction
– Small foot print
– Easy manufacturing
Masisa (Porto Alegre, Brazil)
Ø24’x140’ Long Drum - 60 tons/hr (50% to 3% m.c.)
Martco (Oakdale, LA)
Ø20’x100’ Long – 40 tons/hr (50% to 6% m.c.)
Louisiana Pacific Corp.
Ø20’x100’ Long – 30 tons/hr (50% to 4%)
Lee Energy Solutions
Ø14’x70’ Long – 20 tons/hr (50% to 10% m.c.)
Design Flexibility
• Combine multiply biomass streams at various moistures and dry to
specified moisture content
• Combine various size biomass streams and dry to specified
moisture content
• Minimize power consumption of the Dryer System
– Higher Dryer Drum inlet temperatures
– Hopper/Multi-Clone exhaust system
• Minimize energy consumption of the Dryer System
– Able to process low energy flue gas from other plant processes
• Minimize emissions and possibly eliminate need for Pollution
Control Equipment
– USA (only country in the world that regulates Volatile Organic Compounds (VOC)
– Hardwoods emit less VOCs when compared to Softwoods
Delivery, Installation, Ramp-up
• Typical TSI Rotary Dryer System equipment delivery is between 4
and 6 months
• Typical installation of a TSI Rotary Dryer System ranges between 2
and 5 months
• Typical ramp-up of a TSI Rotary Dryer System ranges between 7
and 30 days
• Return on investment between 6 and 12 months
