미분탄화력발전에서의 바이오매스 혼소 시 플랜트 성능특성 평가
Evaluation of Plant Performance during Biomass Co-firing in Pulverized Coal Power Plant
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초록
The aims of this research were to evaluate effects of biomass co-firing to pulverized coal power plants andthe variation of co-firing ratios on the plant efficiency related to power consumption of auxiliary system andflue gas characteristics such as production and component by process simulation based on the existingpulverized coal power plant. In this study, four kinds of biomass are selected as renewable fuel candidatesfor co-firing: wood pellet(WP), palm kernel shell(PKS), empty fruit bunch(EFB) and walnut shell(WS). Process simulation for various biomass fuels and co-firing ratios was performed using a commercial software. Gas side including combustion system and flue gas treatment system was considering with combination ofwater and steam side which contains turbines, condenser, feed water heaters and pumps. As a result, walnutshell might be the most suitable as co-firing fuel among four biomass since when 10% of walnut shell wasco-fired with 90% of coal on thermal basis, flue gas production and power consumption of auxiliary systemswere the smallest than those of other biomass co-firing while net plant efficiency was relatively higher thanthose of other biomass co-firing. However, with increasing walnut shell co-firing ratios, boiler efficiency and netplant efficiency were expected to decrease rather than coal combustion without biomass co-firing.
Abstract
The aims of this research were to evaluate effects of biomass co-firing to pulverized coal power plants andthe variation of co-firing ratios on the plant efficiency related to power consumption of auxiliary system andflue gas characteristics such as production and component by process simulation based on the existingpulverized coal power plant. In this study, four kinds of biomass are selected as renewable fuel candidatesfor co-firing: wood pellet(WP), palm kernel shell(PKS), empty fruit bunch(EFB) and walnut shell(WS). Process simulation for various biomass fuels and co-firing ratios was performed using a commercial software. Gas side including combustion system and flue gas treatment system was considering with combination ofwater and steam side which contains turbines, condenser, feed water heaters and pumps. As a result, walnutshell might be the most suitable as co-firing fuel among four biomass since when 10% of walnut shell wasco-fired with 90% of coal on thermal basis, flue gas production and power consumption of auxiliary systemswere the smallest than those of other biomass co-firing while net plant efficiency was relatively higher thanthose of other biomass co-firing. However, with increasing walnut shell co-firing ratios, boiler efficiency and netplant efficiency were expected to decrease rather than coal combustion without biomass co-firing.
참고문헌 (12)
- Energy Policies of IEA Countries The Republic of Korea, "Industrial Energy agency" (2012)
- S. Van Loo, "The handbook of Biomass Combustion & Co-firing", pp.230~248 (2008), earthscan
- P. Basu, "Biomass co-firing options on the emission reduction and electricity generation costs in coal-fired power plant", Renewable Energy, 36, pp.282~288 (2011)
- J. Riaza, "Combustion of single biomass particles in air and in oxyfuel conditions", Biomass Bioenergy, 64, pp.162~174 (2014)
- F. Kazanc, "Emissions of NOx and SO2 from coals of various ranks, bagasse, and coal-bagasse blends burning in O2", N2 and O2, Energy Fuels, pp.2011, 25[DOI]
- L. Baxter, "Biomass-coal co-combustion: opportunity for affordable renewable energy", Fuel, 84, pp.1295~1302 (2005)
- E. Karampinis, "Co-firing of biomass with coal in thermal power plants: technology schemes, impacts, and future perspectives", WIREs EnergyEnviron (2013)[DOI]
- S. Black, "Effect of firing coal and biomass under oxy-fuel confitions in a power plant boiler using CFD modeling", Fuel, 113, pp.780~786 (2013)
- J. Li, "Effects of flue gas internal recirculation on NOx and SOx emission in a co-firing boiler", International Journal of Clean coal and Energy, 2, pp.13~21 (2013)
- D. Boylan, "Switchgrass cofiring: pilot scale and field evaluation", Biomass Bioenergy, 19, pp.411~417 (2000)
- M.B. Nikoo, "Simulation of biomass gasification in fluidizd bed reactor using ASPEN PLUS", Biomass Bioenergy, 32, pp.1245~1254 (2008)
- X. Pei, "Process simulation of oxy-fuel combustion power plant using Aspen plus", Energy Convers Manage, 76, pp.581~587 (2013)