Application of the Biomass, OxyFuel, and Flameless Combustion for the utilisation of pulverised coals for electricity generation

Transcription

1 Application of the Biomass, OxyFuel, and Flameless Combustion for the utilisation of pulverised coals for electricity generation Acronym : BOFCom Research Area: Coal Type of project: Research Project duration: 36 months (extended to 42) from to Research programme of the Research Fund for Coal and Steel. Sławomir Kakietek 1

2 Participants: - Energy Research Centre Netherlands ECN, Netherlands (co-ordinator) - IEn, Poland - Clausthal University of Technology CUT, Germany - RWE-Power, UK - Institute Superior Technico IST, Portugal 2

3 Budget Total budget Contribution from EU Consortium Euro ,00 Euro Euro ,80 Euro 3

4 Project Summary This project combines the three most advantageous new technologies for the future reduction of CO2 emissions from pulverized coal fuel fired power plants and simultaneously maintain high efficiencies and low emissions and be able to use a wide variety of (European) coals. These three techniques include the combination of Biomass-Oxyfuel-Flameless Combustion. Biomass co-firing has a CO2 neutral characterisitic, Oxy-Coal firing plus flue gas recirculation will result in increased flue gas CO2 levels which can more easily be separated and sequestrated and Flameless Combustion has the advantage of extremely high efficiencies in combination with uniform heat transfer and very low emissions. A combination of these three technologies, especially for coal, has not been investigated before. 4

5 Research problem Biomass Co-Combustion Oxycombustion Flameless Combustion 5

6 General overview Coal oxycombustion and co-combustion in the 0,5 MW combustion facility (RWE, UK) - 40% O2, rest CO2 and H2O (oxycombustion), - Biomass Additive (co-combustion) Propane-oxygen flameless combustion in the 2 MW gas combustion facility (Linde, Sweden) -100% O2 (oxycombustion) - High Velocity ~ 100 m/s (flameless) 6

7 General overview Biomass co-combustion: -Through coal mills to combustion chamber (on existing instalation) - Through biomass burners to combustion chamber (new instalation) - Through gasifier as a biomass gas (new instalation) Wood Peat Vdaf [%] Lignite Coal 20 Hard Coal Cdaf [%] Anthracite 7

8 in the BOFCom Project: - Literature overview (WP1) - Small scale lab test (WP2) - Large scale lab test (WP3) - CFD and Aspen Simulation (WP4) - Techno-economic evaluation (WP5) Ignition test facility and two drop tubes (WP2) modernised from BOFCom project due to BOFCom needs 0,5 MW test facility (WP3) partially modernised from BOFCom project due to BOFCom needs 8

9 in the BOFCom Project: CFD modelling (numerical modelling) 9

10 Some exemplary results: Dry Oxyfuel Operation Normalised to Air Operation Calculated Flame temperatures,peak Radiation Flux and Convective heat transfer Normalised Adiabatic Flame Temperature Measured Convective Heat Transfer Coefficient indicates 72% Recycle is "Air-equivatent" Calculated dry oxyfuel adiabatic flame temperatures are equivalent to air at 69% recycle WORKING RANGE Measured Peak Radiative data indicates 72-74% Recycle is "Air-equivalent" Normalised Flame Temperature (calculated) 1.6 Peak Normalised Heat Flux (measured) Normalised Convective HTC (measured) Normalised Radiative and Convective Heat Flux % 65% 70% 75% 80% Effective Recycle Ratio 10

11 Thank you 11