Cold Gas-particle Flows in a New Swirl Pulverized-coal Burner by PDPA Measurement |
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Authors: | LI Zhiqiang LI Rongxian ZHOU Lixing |
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Abstract: | 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 coal-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. |
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Keywords: | swirl burner Phase Doppler Particle Anemometer (PDPA) recirculation zone gas|particle flows |
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