The biomass gasification plant to Vaskiluodon Voima in Vaasa and two more ongoing gasification projects

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1 The biomass gasification plant to Vaskiluodon Voima in Vaasa and two more ongoing gasification projects Claes Breitholtz Research engineer

2 The pilot phase is over Technology has been available since the 1970 s Let s finally start using it! Janne Savelainen Lahti Energia 2 Source: Lahti Energia

3 Metso is a global supplier of sustainable technology and services Our customers operate in the following industries: - Mining - Construction - Power generation - Oil and gas - Recycling - Pulp and paper About 29,000 employees in more than 50 countries net sales EUR 5.6 billion. Our shares are listed on NASDAQ OMX Helsinki Ltd. 3

4 Metso Power Wide scope of fuel-flexible power technology Boiler plants Modular power plants Heating plants Automation systems Gasification Power solutions Recovery boilers Environmental systems Automation Rebuilds and upgrades Profilers Intelligent control valves ESD valves Automation systems 4

5 Temperature (C) Metso s Solution for Gasification CFB gasification: Reaction temperature 2500 DRY FUEL 2000 WET FUEL 1500 CFB gasification- Operational area GASIFICATION COMBUSTION 5 0 0, Air coefficient

6 Metso s evolution in gasification TAMPELLA POWER GÖTAVERKEN Tampere pilot plant 15 MWth pressurized FB gasifier Biomass and coal gasification development Hot gas cleaning development ENVIROPOWER Atmospheric CFB gasification development Värö lime kiln gasifier 1987 First generation METSO CFB /BFB Boiler experience NEW DEVELOPMENT ACTIVITY Fuel drying technology Gas cleaning Biomass gasification for limekilns Biomass gasification for power production Waste gasification METSO CFB GASIFIER Second generation 6

7 Gasification technologies Position of Metso CFB gasification PRESSURE OXIDISIER PROCESS ASH FUEL SIZE APPLICATION Atmospheric Air Fixed bed Slagging Coal Pressurized Oxygen BFB Non-slagging Biofuel Steam CFB Oil Entrained flow Transport reactor Flame gasification Gas Waste SMALL 0 10 MW MEDIUM 5-50 MW LARGE MW HUGE MW Combustion engines Combustible gas for industrial furnaces Fossil fuel replacement by bio/waste in power plants IGCC Transport fuels Synthetic NG 7

8 Metso s Solution for Gasification CFB Gasifier Product gas for (lime) kilns Sawdust, forest residues, fresh wood, bark MW fuel units Typically includes a dryer Dusty product gas Also other types of kilns possible Product gas for power boilers Woody biomass, bark, peat, straw Superior electricity efficiency (Existing) power boilers MW fuel units Typically includes a dryer (Gas filtering) Product gas from waste for power production Waste-derived fuel High electricity efficiency Typically a new gas boiler Gas filtering -> clean product gas MW fuel units or multiple units connected to a boiler 8

9 Vaskiluodon Voima Oy gasification project Replacing coal with biomass for electricity production in an existing boiler

10 Vaskiluoto coal-fired power plant in Vaasa In operation since 1982 Thermal capacity MW Production - electricity 230 MW - district heating 170 MW Coal consumption 400, ,000 t/a Produces approximately 90% of the district heat needs in Vaasa region 10

11 Vaskiluodon Voima Oy gasification project Enables to replace a large share of coal with biomass 140 MW biomass gasifier and dryer Adjoined to the existing 560 MW coal-fired power plant Up to 40 percent replacement of coal Schedule Contract signed June 2011 Plant operational 12/2012 Total project cost < 40 M 11

12 Biomass gasification into the existing coal-fired plant Short delivery time and minimized production interference Relatively low investment cost Integrated drying process Original coal capacity available 12

13 Typical gasification applications Example:100 MW of biofuel available at the district Cofiring is an efficient way to use biomass 100 MW, fuel Small boiler efficiency 25 % 25 MW green electricity 100 MW, fuel 400 MW coal Large boiler efficiency 40 % 40 MW green electricity MW coal electricity The final outcome is 60 % more green electricity! 13

14 Vaskiluodon Voima biomass gasification plant Instrumentation, electrification and automation Dried biomass Product gas Wet biomass Biomass receiving and pre-handling Large-scale belt dryer CFB gasifier 140 MW fuel Existing PC boiler modifications and new burners 14

15 Vaskiluodon Voima, Finland External Fuel Handling Start-up 2012 Gasifier Drying Storage Silos Process Fuels Fuel Receiving 4 x 120 m 3 Gasification (140 MW) for Power Generation Forest resudues (chips), Peat Sampling Screening Receiving Receiving and Screening Capacity Fuel Sampling Fuel Silos and Reclaiming Capacity Drying Capacity 600 m 3 /h Automatic 5 samples / truck 2 x m 3 2 x m 3 /h 10 t/h of evaporated water 15

16 Metso belt dryer for biomass Double layer WET PRODUCT IN AIR IN HEAT EXCHANGER SEMI-DRY PRODUCT IN DRY PRODUCT DISCHARGE SCREW FEEDING SCREW FAN DRY PRODUCT OUT For water evaporation capacity up to BELT WASHING AIR OUT SEMI_DRY PRODUCT DISCHARGE SCREW 20 tons/h 16

17 Gas heat value hot MJ/m 3 n Fuel moisture vs. gasifier output Fuel moisture 20% (Design point) 30% 40% Gasifier max output % Example case:waste fuel, HHV dry 22,5 MJ/kg, Ash 7,6% Gas heat value MJ/m 3 n hot ( incl. sensible heat ) Fuel moisture 17

18 Metso CFB Gasifier 3 1 1) Fuel silo 2) Reactor 3) Cyclone 4) Productgas/ Gasification air heat exchanger 5) Gas pipe 6) Ash removal

19 Lahti Energia project Solid waste gasification for efficient production of electricity

20 Lahti Energia - solid waste gasification 160 (2x80) MW, tn/a Total Investment 157 M Start up April 2012 Waste fuel handling 1. Fuel handling 2. Gasifier 3. Gas cooling 4. Gas filter 5. Gas boiler and flue gas cleaning Gas boiler and APC Gasifier and gas cooler Old PC boiler 20

21 Benefits of waste gasification High steam parameters higher efficiency - Lahti 160 MW fuel => 50 MWe + 90 MW district heat - Lahti 120 bar, 540 C live steam - Technology can offer even higher electricity efficiency Lower grade waste as a fuel lower fuel cost - Lahti fuel : Household waste (origin sorted), Industrial waste, demolition wood, waste wood from industry - LHV MJ/kg, dry ; Moisture< 30 %, Cl < 0,4 % Tolerance for fuel quality multiple fuel sources Less corrosion less expensive materials in the boiler 21

22 log p Technical concept Gasify waste at C Cool it down to about 400 C - all corrosive components, alkalichlorides, Pb, Zn will be in solid form Filter all dust out so the resulting gas is clean Burn clean gas in gas fired boiler 1,E-03 1,E-04 1,E-05 1,E-06 1,E-07 1,E-08 1,E-09 AC/GAS/NaCl - AC/GAS/KCl - AC/GAS/ZnCl2 - AC/GAS/PbCl2 - Saturated steam-na2so4(g) Saturated steam-k2so4(g) Saturated steam-zncl2(g) Saturated steam-pbcl2(g) Saturated steam-kcl(g) Saturated steam-nacl(g) AC/GAS/Na2SO4 AC/GAS/K2SO4 AC/GAS/PbO AC/GAS/ZnO Temperature [C] Fuel handling 2. Gasifier 3. Gas cooling 4. Gas filter 5. Gas boiler and flue gas cleaning 22

23 Operational window to clean out corrosive compounds All water walls cooled with boiler feed water Avoid risk of corrosion in cooler Condensate corrosive components on particles Avoid tar condensation in cooler High temperature ceramic filter Filter can tolerate high temperatures Tar condensation can be avoided 23

24 GoBiGas project Producing SNG from Biomass

25 GoBiGas project Production: ~20 MW bio methane of wood pellets Investor: Göteborgs Energi AB Total cost approximately: 100 MEUR Schedule: In operation 2013 Gasification and boiler island technology: Metso/REPOTEC Metahanation technolgy: Haldor Topsöe EPCM for metahanation: Jacobs process GoBiGas - Phase 1 Existing boiler 25 Solander Symposium 2011 Claes Breitholtz Source: Göteborg Energi

26 Indirect gasification,biomass CHP plant, Güssing Start of construction September 2000 Start up November 2001 Fuel Wood Chips Fuel Power 8 MW Electrical Power 2 MW Thermal Power 4,5 MW Electrical Efficiency 25 % Total Efficiency 80 % Operational hours over h 26 Solander Symposium 2011 Claes Breitholtz

27 GoBiGas process Gasification: Metso scope Forest residues Wood pellets Steam Dryer Fuel handling Air preheater Flue gas Hot water Bag filter De-NOx Air Gasifier Combustor Sulphur rich gas Hot water Tar removal Bed material Tar Tar } Methanation Tar removal Sulphur removal Shift Steam CO2 to inert Biomethane Drying Upgrading Methanation CO2- removal gas system/ atm 27 Solander Symposium 2011 Claes Breitholtz Source: GoBiGas

28 CFB Combustor Indirect Gasification in Dual Fluidized Bed Producer gas Flue gas Fuel BFB Gasifier Air Fuel is feed to the BFB gasifier The gasifier is fluidized with steam Bed material is circulated to transport heat from the combustor to the gasifier Char in fly and bottom ash from the gasifier is burnt in the combustor riser Fly ash from the combustion is recirculated to the gasifier Steam 28 Solander Symposium 2011 Claes Breitholtz

29 Gas Cleaning INTERNAL Cooler Filter Scrubber Cooling of producer gas Dust removal in a textile filter Removal of tars and water solvable pollutants in a oil scrubber 29 Solander Symposium 2011 Claes Breitholtz

30 Thank You!

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