Experimental and numerical study the effect of using rice husk in the co-firing process on thermal efficiency and exhaust gas emissions at coal fired power plant

The rapid growth of industry in developing countries that could not be avoided in harmony with the increase in air pollution resulting from the rest of the combustion flue gas industry, one of which is a Coal Fired Power Plant that also be a source of emissions, in addition, the high demand for fossil fuels in the future so there will be scarcity of fuel, then it takes the innovation of the use of biomass fuels (renewable energy). Experiments and simulations were performed at PLTU Pangkalan Susu on Load 135 MW with the testing of Co-Firing biomass rice husk on 3 (three) testing models, namely the mixing of biomass 3%, 5% and 7% with coal. From the results of experiment testing and simulation of ansys fluent comparison between pure coal combustion and co-firing, a decrease in boiler efficiency was obtained by 0.8%, a decrease in specific fuel consumsion by 1.15%, an increase in the efficiency of force draft fans by 0.45%, an increase in primary air fan efficiency by 0.35%, a decrease in the use of the mill itself by 2.26%, a decrease in net plant heat rate by 1.89%, a decrease in SO2 exhaust emissions by 29.22%, a decrease in CO exhaust emissions by 0.57% and an increase in CO2 exhaust emissions by 1.99%.