Biomass in CHP ESCOBALT seminar Energy. Future. Responsibility. Challenges and Tools for regional planning Jouni Kinni 14 June, 2007 Helsinki
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