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BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Energy Efficient Air Drying of Biomass( Woodchips, Bark, Saw Dust, ForestWaste, & Bagasee)"
March 16 2011
By: Fred BennettGeneral Sales MangerMetso Wood Handling - North AmericaMetso Paper USA
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer Design Basis:The Metso Kuvo belt dryer is a low-temperature dryer which is designed toremove water efficiently by evaporatingmoisture from wet biomass, like bark, woodchips, sawdust, bagasse etc. The dryer is ableto utilize various low-temperature heatsources; waste heat, low-pressure steam, hotwater, or hot air – no primary energy isneeded. Dry biomass can then be used asbiomass fuel, or in fuel making process . Thedrying process is gentle to the product and ithas high availability and high capacity
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Metso Kuvo Belt Dryers For Biomass• Based on the Following Belt Drying Principles
* Utilization of waste heat* High availability
*Non-destructive drying*Low emissions
*Automatic operation*Low Maintenance
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Kuvo Belt Dryer For Biomass• Several applications
1) Gasification processReplacing oil with syn gas in
lime kilnHigh oil priceCO2 taxation
Bioethanol/biodieselproduction
2) PelletizingRaw material drying before
pressing3) Power productionTo increase combustion
efficiency
GASIFIER
BELT DRYER
LIME KILN
WETBIOMASS
SYNGAS
DRYBIOMASS
Biomass drying and gasificationcan be used to reduce oil
consumptionin lime kiln
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer For Biomass• Modular Structure Provides flexible dimensioning
• Capacity- Evaporation 2 - 20 tons of H2O/h- Material flow 20 - 200 loose-m3/h
- Dry content in typically 30-60 %
- Dry content out - up to ~90 %
• Size / unit- Area 40 - 260m2
- Length up to 50m (165 ft)- Width up to 6m (20 ft) For bigger capacities, several
dryers can be installed one on topof the other to save floor space
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer For Biomass• Utilization of waste heat
Two heat sources likehot water and steam or
two hot water sources can becombined in the same air heat
exchanger
Belt Dryer can utilize severaltypes of low temperaturesources
1)Low temperature water40°C…120°C (104°F -250°F)
2) Low pressure steam
3) Hot waste gas
4) Hot oils
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
KUVO Belt Dryer For Biomass
KUVO BELTDRYER DRY BIOMASS
SECONDARYHEAT
EVAPORATEDWATER
WET BIOMASS
• Bark• Wood chips• Sawdust• Woodresidues• Bagasse
Gasification
Pelletizing
Combustion
Hot water140-212°F
LP-steamFlue gas (clean )
Hot oil
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
WET BIOMASS IN
EXHAUST AIREVAPORATED WATER
FRESH AIR IN
HOT WATER OR STEAM
DRY BIOMASS OUT
Belt Dryer For Biomass
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
WETPRODUCT
IN
BELTWASHING
FAN
FEEDINGSCREW
DRYPRODUCTDISCHARGESCREW
HEATEXCHANGER
AIR IN
AIR OUT
Belt Dryer For Biomass
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer For Biomass• Double layer
WETPRODUCT
IN
BELTWASHING
DRYPRODUCT
OUTFAN
FEEDINGSCREW
DRY PRODUCTDISCHARGE SCREW
SEMI-DRYPRODUCT INHEAT
EXCHANGERAIR IN
AIR OUT
SEMI-DRYPRODUCTDISCHARGESCREW
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer View Inside the Dryer with VariousMaterials and Layered Drying
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Metso KuvoBelt DryerFor Biomass
Example Layout 150 m2
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
KUVO Belt Drying System in OperationDrying Biomass for Gasification Process
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer Installation
Material Saw dustSide 258m2
Layer type Single pass systemHeat source 72°C water/glycolCapacity 7 t/h evap. water
• Uelzen(Germany)
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer Installation• Vielsalm(Belgium)
Process Pelletizing
Materal Saw dust
Size 2 x 205 m2 (stacked)
Layer type Double pass sy
Heat source 90°C water/glycol
Capacity 2 x 10t/h evap. water
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer Installation• Krauchenwies
Process PelletizingMaterial Saw dustSide 120m2
Layer type Double PassSystem
Heatsource
80°Cwater/glycol
Capacity 4.5 t/h evap.water
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Metso Belt DryerInstallation
Process GasificationMateral Bark & forest
chips
Size 150m2
Layertype
Double
Heatsource
100°Cwater/glycol
Capacity 8.3 t/h evap.water
Heat exchangers mountedon top of the Belt Dryer
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Drying Systems in warmer climates do not require a protective building
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer For BiomassStacking the Dryers for Limited Real Estate
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Kuvo Belt Dryer sinclude: Exhauststacks and accessplatforms,Structural supportstructure, RainProtectionshields/covers
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Infeed Metering ScrewsMeters the material evenlyonto the Dyers Belt
Kuvo Belt Dryer uses a very durable Poly MeshBelt – Belt life Averages 3- 5 years
Metso Kuvo Belt DryerFor Biomass
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Belt Dryer For Biomass• Modular construction
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
Metso Belt Dryers For Biomass• Expect results
* Utilization of waste heat* High availability
*Non-destructive drying*Low emissions
*Automatic operation*Low Maintenance
BioPro Expo & Marketplace / Atlanta, GA / March 14-16, 2011
ARE THERE ANY QUESTIONS?
THANK YOU FOR YOUR ATTENTION !