A Study on Optimization of Pulverized Coal Firing Combustion in SG 130-40-450 Boilers by Using CFD Simulation

Coal firing power plants have been playing important roles in national power supplying resource. According to the master power plan number 7+, in 2016, the demand for power generation capacity is approximately two times higher than the annual GDP growth rate, and it must ensure the efficient use of domesic Anthracite coal and imported coal. Therefore, the paper focuses on enhancing the efficiency of blending of coal firing combustion in tangental SG 130-40-450 boilers by using mumerical simulation CFD software. The results of the study have determined that the efficiency of blending of coal combustion is highly depending on coal blending ratio and primary air/ secondary air ratio. When the proportion of imported coal and domestic coal increases, the complete combustion efficiency also increases and reaches the highest efficiency of 95,4%.With 20% blending of sub-bitum coal, the proportion of primary/ secondary air ranges from 0,8 to 1,2