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

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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

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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 14121jouni.kinni@metso.comBox 109, Kelloportinkatu 1DFI-33101 Tampere, Finlandwww.metsopower.com