Research on Energy Consumption and Carbon Emission Characteristics of Biomass Co-firing in a 660 MW Coal-fired Power Unit
In order to accurately obtain the energy consumption and carbon emission characteristics of bi-omass coupled power plant,the calculation method of fuel consumption rate and coal consumption rate of the biomass coupled power unit was proposed,and the performance test of biomass co-firing in furnace was conducted in a 660 MW coal-fired power unit.The research results show that during biomass co-fir-ing,the fuel consumption rate has a certain deteriorative tendency due to the drop in boiler efficiency and the rise in auxiliary power consumption ratio,while the coal consumption has a certain improvement tend-ency.The drop in boiler efficiency is caused by the rise in heat losses due to exhaust and unburned car-bon in refuse.The rise in auxiliary power consumption ratio is due to the rise in power consumption of the biomass disintegrator and conveying fan.The higher the biomass blending ratio,the larger drop in boiler efficiency,the larger rise in auxiliary power consumption ratio,the larger rise in fuel consumption rate,and the larger drop in coal consumption rate.When the unit load is 350 MW and the biomass blending quantity is 10 t/h,the net fuel consumption rate increases by 1.966 g/(kW·h),the net coal consump-tion rate decreases by 11.858 g/(kW·h),and the unit carbon emission reduction is 12.40 t/h.
biomass co-firingboiler efficiencyauxiliary power consumption ratioenergy consump-tioncarbon emission