Cold gas-particle flows in a new swirl pulverized coal burner by PDPA measurement

A new type of swirl burner has been developed to stabilize pulverized coal combustion by burning different types of coal at different loads and to reduce NOx formation during combustion. The burner uses a device to concentrate the coal powder in the primary air tube that divides the primary coat air into two streams with different pulverized coal concentrations This paper reports the measurement of gas particle flows at the exit of the different swirl burners using a 3-D Phase Doppler Particle Anemometer (PDPA). The effect of different geometrical configurations on the two phase flow field is studied. The results that give the two-phase flow fields and particle concentrations show the superiority of the new swirl burner.