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Research and Development on Stabilizing Pulverized Coal Combustion Technology by Counter Offsetting Primary Air and Coal Streams for T Fired Boilers

Zhao Zongrang Zhang Mingchuan (Thermal Power Research Institute)  
The design concept for stabilizing pulverized coal combustion technology by counter offsetting primary air and coal streams for T fired boilers was first presented and analysised in this paper. Based on the numerical modeling of three dimensional turbulence flow in furnace, burner retrofitting for unit 3 at Jiaozuo power plant were optimized. Computational results and post retrofitted field tests confirmed that the stabilizing combustion technology by counter offsetting primary air and coal streams could significantly increase the residence time of coal particles in the early stages of combustion, therefore improved ignition conditions, and it also could effectively alleviate the remained swirl at furnace outlet to reduce flue gas imbalance, as well as change tangential trajectory of coal particles to reduce the slagging and high temperature corrosion potential along furnace water walls near burner zones.
【CateGory Index】: TK229.6
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