内循环流化床下旋流场中气固多相流动的研究

A Study for Gas-Particle Flows in Downward SwirlingFlow Field of internal Circulating Fluidized Bed

基于已求得的内循环流化床下旋流场的气相流动场，求得了颗粒相运动方程，用四阶Ｒｕｎｇｅ－Ｋｕｔｔａ法对此区域内颗粒运动特性进行了数值模拟。结果表明，内循环流化床能实现炉内分离和循环，延长颗粒在炉内停留时间，提高颗粒燃尽度和燃烧效率。

Based on the gas phase flow field of downward swirling flow field in ICFB,the motion equation equation of the particle phase is obtained in this paper. Numericalmodeling for particles in this area is completed with the Runge-Kutta method. The results indicate that the ICFB may realize the separation and circulation of particles,prolong the particle residence time, increase the burn-off rate and combustion efficiency.