Characteristics of Co-firing Solid Recovered Fuel with sub-bituminous Coal on Pulverized Coal Boiler Power Plant 300 MWe

¹ PLN Research Institute, Jl. Duren tiga No. 102, Special Region of Jakarta 12760, Indonesia
² Department of Biochemistry, University of Malakand, Chakdara, Lower Dir, 18800, Khyber Pakhtunkhwa, Pakistan

^* Corresponding author: fefria.t@pln.co.id

Abstract

The biomass co-firing test was conducted at a pulverized coal power plant with a capacity of 300 MWe to determine the effect of cofiring on the operating parameters, such as Mill Outlet Temperature (MOT), Furnace Exit Gas Temperature (FEGT), Specific Fuel Consumption (SFC) and environment. Biomass Solid Recovered Fuel (SRF) and coal was mixed in a stockpile with a composition of 5 % SRF and 95 % coal. Fuel mix was fed into the four operating bunker mills. The load stabilization process duration is 1 h after the biomass is fed to the boiler by keeping the loading constant at the maximum capacity rate. The data was recorded for 2 h with a retrieval interval of every 15 min. The results showed that the FEGT value during co-firing was 0.7 % lower than during coal firing. The mill outlet temperature ranges from 58 °C to 60 °C in both test conditions. NOx emissions increase by 10.1 %, and SO2 emissions increase by 5.5 % during co-firing than coal-firing conditions. There is no significant change in SFC where the value equals 0.54 kg kWh^-1 on both tests.