采用相位多普勒分析仪(PDA)系统对炉膛再燃区域气固两相流动动力特性进行了测量,得到了在不同主燃区过量空气系数α条件下再燃区气固速度分布的规律。结果表明:随着主燃区过量空气系数的增大,气固两相滑移现象加剧,并且3个工况的气固两相滑移主要集中在X方向上,关闭相邻多层一、二次风喷口会使得主燃区的旋转气流在到达再燃区前的较长区域内没有受到射流的驱动,流场类似自由旋转状态,旋涡直径逐渐增大。图6表1参7 The dynamic characteristics of gas-solid two-phase flow in the furnace reburning zone were measured by a phase-Doppler analyzer (PDA) system, and the law of gas-solid velocity distribution in the reburn zone was obtained under the conditions of excess air coefficient α in different main combustion zones. The results show that with the increase of excess air ratio in the main combustion zone, the phenomenon of gas-solid two-phase slip aggravates, and the gas-solid two-phase slip of the three conditions is mainly concentrated in the X direction, The secondary air vents will make the main combustion area of ​​the rotating air flow in the longer reach before the reburning zone is not jet driven, the flow field is similar to the free-wheeling state, the vortex diameter increases. Figure 6 Table 1 reference 7