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CFB Technology for Biomass Utilization in Heat and Power Generation 5 Jun 2013, Belgrade, Biomass for District Heating Systems in Serbia Vesna Barišić.

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Presentation on theme: "CFB Technology for Biomass Utilization in Heat and Power Generation 5 Jun 2013, Belgrade, Biomass for District Heating Systems in Serbia Vesna Barišić."— Presentation transcript:

1 CFB Technology for Biomass Utilization in Heat and Power Generation 5 Jun 2013, Belgrade, Biomass for District Heating Systems in Serbia Vesna Barišić

2 1 Biomass as Energy Source –Advantages of CFB Technology Challenges in Biomass Combustion –Advanced Biomass CFB (ABC) Technology Selected Foster Wheeler References Presentation outline

3 2 Biomass as Energy Source

4 3 Incentives against CO 2 emissions promote renewable fuels => biomass Public institutions subsidize and support biomass projects Regulatory organisms do not release permits to fire fossil fuels investors look into biomass Traditional biomass (wood-based) is costly and unavailable Agriculture residues are locally/globally available, and more economic CFB is IDEAL TECHNOLOGY for large scale power generation for broad range of biomass alone, or co-firing in larger fossil fired power plants! Growth in Biomass Utilization in Energy Production

5 4 Fuel flexibility and multi-fuel firing –Simultaneous and/or alternate use of broad range of fuel qualities Excellent emission performance –DeSOx /DeNOx plants typically not required High availability & competitive price Longer boiler life and improved reliability due to low even combustion temperature Advantages of CFB Technology

6 5 CFB Technology Offers Wide Fuel Flexibility Coal Anthracite Bituminous Subbituminous Lignite Waste Coal Anthracite Culm Bituminous Gob Coal Slurry Oil Shale Peat Woody Biomass Bark Wood Chips Sawdust Forest Residues Willow/Salix Agricultural Residues Olive Waste Straw Bagasse Rice Husk Sunflower Dried Fruits etc. Waste Derived Fuels Recycled Wood/Paper/ Plastics Solid Recovered Fuel Tire Derived Fuel Sludge Pulp and Paper Mill Municipal Gas Oil Petroleum Coke CFB Technology Opens the Door to Fuel Flexibility and Carbon Neutral Fuels

7 6 Challenges in Biomass Combustion

8 7 Compared to Fossil Fuels Biomass Ash Chemistry is More Complex

9 8 Challenges Associated with Biomass Combustion are Well Understood - Foster Wheeler Fuel Model - AgglomerationFoulingCorrosion

10 9 Technical Solutions for Biomass Combustion Advanced Biomass CFB (ABC) Technology Control of Fouling & Corrosion Control of Agglomeration & Fouling Empty pass before conv. HX - Flue gas temperature - Wider spacings in width - Flue gas velocities - Fully recractable sootblowers - Austenitic convection SH&RH Conservative flue gas velocity Integrated Steam Cooled Solid Separator and Return Leg Step Grid Final SH & RH as INTREX Active Bed Material - Normal sand + PC ash During Operation: - Fuel quality management - FW SmartBoiler datalog & Diagnostic tools Recirculation gas utilization for temperature control Additives

11 10 Selected References

12 11 Foster Wheeler CFB Reference – 414 units – Polaniec Kaukas Jyväskylä Igelsta Samcheok Fortum Częstochowa

13 12 *only at 100% load with Mix 1, 2, and 3 Total plant efficiency ~110% LHV  90% HHV 240 MW th, 73 MW e-net, 209 MW DH, 92 kg/s, 90 bar, 540°C Multifuel CFB for Clean Biomass and Waste (CHP) Igelsta, Söderenergi AB, Södertälje, Sweden Mix 1Mix 2Mix 3 Biomass[% LHV ] Recycled Wood[% LHV ] RDF[% LHV ] Moisture[% ar ] Ash[% dry ] Nitrogen[% dry ] Sulfur[% dry ] Chlorine[ppm dry ] LHV[MJ/kg ar ] % O 2, dry NOx [mg/MJ]35* SO 2 [mg/m 3 n]75 CO [mg/m 3 n]50* Dust [mg/m 3 n]10 NH 3 ppm10 TOC [mg/m 3 n]10 HCl / HF [mg/m 3 n] 10 / 1 Cd+Tl / Hg / HMs [mg/m 3 n] 0.05 / 0.05 / 0.5 PCDD+F[ng/m 3 n]0.1 Commercial operation: 2009

14 13 Large Scale CFB for Clean Biomass (CHP) Kaukas, Kaukaan Voima Oy, Finland 385 MW th, 125 MW e-net, 110 MW DH, 149 kg/s, 115 bar(a), 550 °C FuelBiomassPeat Moisture[% ar ]4850 Ash[% dry ]2.55 Nitrogen[% dry ] Sulfur[% dry ] LHV[MJ/kg ar ] PerformanceBiomass Flue gas T exit [°C]149 Boiler efficiency[%]91 NO x [mg/m 3 n]150 SO 2 [mg/m 3 n]200 CO[mg/m 3 n]200 Dust[mg/m 3 n]20 Commercial operation: 2010

15 14 Large Scale CFB for Biomass with 20 wt-% Agro Polaniec, GFD Suez Energia Polska S.A, Poland FuelWood Chips 80% + Agro 20% (Straw, Sunflower, Dry Fuits, PKS,...) Moisture[% ar ]35.9 Ash[% dry ]2.8 Nitrogen[% dry ]0.25 Sulfur[% dry ]0.05 Chlorine[ppm dry ]<396 LHV[MJ/kg ar ]10.5 6% O 2, dry NO x [mg/m 3 n]150 SO 2 [mg/m 3 n]150 CO[mg/m 3 n]50 Dust[mg/m 3 n]20 World’s Largest Solid Biomass Fired Power Plant 447 MW th, 205 MW e, 127/20 bar(a), 535/535°C Commercial operation: 2012

16 15 Co-firing Biomass and Coal

17 16 Smaller investment cost per MW e than in smaller units Higher plant efficiency than in smaller units Not dependent on biomass availability Technical challenges (AFC) reduced in co-firing Benefits of large scale biomass co-firing in CFB

18 17 Medium Size CFB for Cofiring Biomass/Coal (CHP) Fortum, Częstochowa, Poland FuelCoalWood Residue Willow Mix% heat in Moisture[% ar ] Ash[% dry ] Nitrogen[% dry ] Sulfur[% dry ] LHV[MJ/kg ar ] MW th, 66 MW e, 77.2 kg/s, 111 bar(a), 515°C 6% O 2, dry NO x [mg/m 3 n]200 SO 2 [mg/m 3 n]200 Dust[mg/m 3 n]30 Commercial operation: 2010

19 18 Large Scale CFB for Cofiring Peat/Coal and Virgin Biomass (CHP) Jyväskylä, Jyväskylän Energia Oy, Finland FuelPeatCoalForest Residues Moisture[% ar ] Ash[% dry ] Nitrogen[% dry ] Sulfur[% dry ] Chlorine[ppm dry ]<500<2000<200 LHV[MJ/kg ar ] PerformancePeat Flue gas T exit [°C]90 Boiler efficiency[%]94.1 NO x [mg/m 3 n]150 SO 2 [mg/m 3 n]200 CO[mg/m 3 n]200 Dust[mg/m 3 n] MW th, 200 MW e, 160/143 kg/s, 164/40.5 bar(a), 560/560°C Commercial operation: 2010

20 19 Coal & Biomass Co-Fired Supercritical CFB Project Samcheok 4 x 550 MW e –437/356 kg/s, 25.6/5.4 MPa, 603/603 °C –Efficiency 42.4% (net) Fuel flexibility: –Lignite/Subbituminous coal –Wood Pellets max 5% KOSPO, Korean Southern Power Co. Ltd Foster Wheeler scope: Basic design of boiler plant and delivery of hot loop pressure parts etc. Contract Signed (NTP): June 2011 Commercial operation: x 550 MW e supercritical OTU – CFB to feed 2 x 1100 MW e turbines

21 20 Biomass has an important role in reducing the environmental effects of energy production both in pure biomass plants and in coal and biomass co-combustion CFB technology is an ideal Technology to be used for large scale power generation with broad range of solid biomass fuels CFB Technology with pure biomass firing available up to 600 MW e scale and with coal co-firing up to 800 MW e scale Summary

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