Cold experimental studies of flow field in the swirling coal combustion device

In this paper, the influence of different geometric and operation parameters on the flow field in the swirling coal combustion device were studied, like the tuyere positions, the air supply forms and the air velocity, for the particles velocity distribution in the D300 furnace. By comparing the distribution of particles in the four inlet modes of 0 °, 10 °, 16 ° and 22 °, the tangential velocity distribution of particles is more symmetrical along the radial direction under the condition of 0° air inlet. Tangential velocity is smaller, increase the residence time of pulverized coal in the swirling coal combustion device. The residence time of fuel particles also can be prolonged which is beneficial to increase the combustion efficiency of the swirling coal combustion device. And provide the basis for the selection of the swirling coal combustion device in hot experiment. (paper)