Energy Efficient Air Drying of Biomass

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 !