Abstract: For the problems of the poor combustion stability, low combustion efficiency and severely slagging in W flame boiler split burner, based on the analysis of combustion principle and the numerical simulation experiment, a new type split direct flow burner was designed. The exhaust gas fire nozzle was laid in two secondary air areas next to the furnace center. A secondary air nozzle was laid in a primary air nozzle next to water wall. The results show that new type split burner enhance the combustion stability and combustion efficiency of the boiler, and slagging can be effectively controlled.

Key words: W flame boiler, split burner, combustion stability, combustion efficiency, slagging