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Biomass in CHP
ESCOBALT seminarEnergy. Future. Responsibility.Challenges and Tools for regional planning
Jouni Kinni14 June, 2007 Helsinki
2 © Metso Corporation 2007
Biomass in CHP
CONTENTS• Metso Power• Fluidized bed combustion for biomass• Case examples
- Fortum Tartu, Estonia BFB 80 MWth
- Vilniaus Energija, Lithuania BFB Conversion 60 MWth
- Porin Prosessivoima, Finland CFB 177 MWth
3 © Metso Corporation 2007
- Over 160 HYBEX boilers (BFB) - Over 60 CYMIC boilers (CFB)and BFB conversions since 1979 since 1980
- Capacity max 300 MWth - Capacity max 550 MWth
Fluidized bed boiler experience
© Metso Corporation 2007
Fluidized bed combustion technologies
Bubbling Fluidized Bed Circulating Fluidized BedBFB CFB
© Metso Corporation 2007
Fuel characteristics for BFB and CFB
0
HEA
TIN
G V
ALU
E →
VOLATILES →
COAL
C=50C=55
C=60C=65
C=70C=75
C=80
H=3,5
H=4,0H=4,5 H=5,0
H=5,5H=6,0 H=6,5 H=7,0
CYMIC HYBEXCFB BFB
BROWN COAL
PEATWOOD
6 © Metso Corporation 2007
Advantages of Fluidized Bed Combustion
• Wide fuel flexibility- Wide variation in heating value and fuel
type• Controlled combustion
- Very high burn-out of ashes, lowemissions and high thermal efficiency
• Simple construction- High reliability- Low maintenance
7 © Metso Corporation 2007
Boiler furnace
Load burners
Fluidized bed
Overfire air
Fuel feeding
Primary air
Bottom ash removal
Hydro Beam floor
HYBEX - Bubbling Fluidized Bed boilers
• For biomass fuels with varying heating value and moisture content
8 © Metso Corporation 2007
Fuel quality requirements
• Heating value for Bubbling Fluidized Bed combustion- Normal design: max 13 MJ/kg- Higher values possible with special design
• Alkalines (Na+K)- Below 0,2% of dry solids for regular sand
• Risk with one-year crops- Higher value possible with AggloStop bed material
• Metallic Al+ total Pb+Zn+Sn- No waste fuels accepted for biomass design- Up to 1% for waste boiler design
9 © Metso Corporation 2007
Biomass in CHP
CONTENTS• Metso Power• Fluidized bed combustion for biomass• Case examples
- Fortum Tartu, Estonia BFB 80 MWth
- Vilniaus Energija, Lithuania BFB Conversion 60 MWth
- Porin Prosessivoima, Finland CFB 177 MWth
© Metso Corporation 2007
HYBEX - Bubbling Fluidized Bed Boiler
Fortum TartuEstonia
Steam 80 MWth28,5 kg/s115 bar525 °C
Fuels Wood fuel, peat, Start-up 2008
11 © Metso Corporation 2007
Condensing Scrubber + Combustion Air Humidifier
© Metso Corporation 2007
Bubbling Fluidized Bed Conversion
Vilniaus EnergijaVilniusLithuania
Steam 60 MWth22 kg/s40 bar440 °C
Fuels Wood chips, peat,
Start-up 2006
• Fuel feeding openings• Start up burner opening• Hydro Beam floor
13 © Metso Corporation 2007
HYBEX boilerHydro Beam Floor
• Developed for demanding fuels• Totally water-cooled air beams• Open bottom design
- Free area over 30% of cross section
• Excellent removal efficiency• Patented design
14 © Metso Corporation 2007
Hydro Beam floor
© Metso Corporation 2007
CYMIC - Circulating Fluidized Bed Boiler
Porin ProsessivoimaPoriFinland
Steam 177 MWth67 kg/s84 bar522 °C
Fuels Wood fuel, peat, recycled fuel, coal
Start-up 2008
16 © Metso Corporation 2007
Porin Prosessivoima, Pori, Finland
Design fuels
150 - 100
100 - 10
600 - 100
150 - 50
Design mix C
%
% of fuel heat input
8 - 19
8 - 15
<10
1 - 3
Ash% of DS
Design mix C
Oil
Coal
Recovered fuel(RDF)
Peat
Wood fuel
Type
48
5 - 12
9 - 40
40 - 56
45 - 60
Moisture%
10
Start-up and support fuel
23 - 30
11 - 21
6 - 11
6 - 10
LHVMJ/kg
9
17 © Metso Corporation 2007
Porin Prosessivoima, Pori, Finland
Process flow sheetNH3 solution
Wood fuel,Peat, RDF
Ca(OH)2Activated
carbon
Sand
Limestone
Coal
18 © Metso Corporation 2007
Porin Prosessivoima, Pori, Finland
Emission guarantees
20TOC
0,1Dioxins and furans, I-TEQ, ng/Nm3
0,5Sb+As+Pb+Cr+Co+Cu+Mn+Ni+V
0,05Hg
0,05Cd+Tl
2HF
190240CO
70HCl
30Dust
9026090…110SO2
10020570…90NOx
ppmmg/Nm3mg/MJ
Values in mg/Nm3 and ppm are at dry gas corrected to 6% O2 (dry)
19 © Metso Corporation 2007
Jouni KinniSales ManagerMetso Power OyPhone direct +358 20 141 2416Mobile phone +358 400 623 610Operator +358 20 [email protected] 109, Kelloportinkatu 1DFI-33101 Tampere, Finlandwww.metsopower.com