Numerical Study on Combustion Characteristics of Wall-type Tangential Boiler

The research object of this paper is a 600MW wall-tangentially fired boiler of a power plant. In order to understand the combustion characteristics of the boiler, this paper first analyzes the flow characteristics in the furnace at 600MW to make familiar with the flow in the furnace. Combined with the flow characteristics in the furnace, the combustion conditions of the boiler under three different loads of 600MW, 480MW and 360MW are analyzed. It can be seen from the simulation results that as the boiler load increases, the temperature level in the furnace increases significantly, the flame length increases and the ignition distance of the pulverized coal jet decreases slightly. The burnout distance of the pulverized coal from the burnout zone to the flame angle is increased. The O-2 concentration gradually decreases, CO2 concentration gradually increases and unburned carbon loss increases. Combined with the boiler thermal design parameters, it can be seen that the simulation results are basically the same as the design combustion parameters, which indicates that the simulation results can more accurately depict the combustion characteristics of the boiler.