二段往复炉排焚烧炉炉拱的优化辅助设计

为实现二段往复炉排焚烧炉炉拱的优化设计 ,运用PHOENICS软件进行炉内流场的模拟 ,研究炉拱形状和尺寸对流场的影响。通过模拟发现 ,后拱后移可以避免压火现象 ,保证炉膛空间良好的火焰充满度 ,但存在最佳后移尺度 ,以同时保证喉口位置烟气湍流效果强烈 ,充分发挥炉膛后拱和前拱的辐射及对流传热的效果。根据炉内气流湍动情况以及风速的范围 ,确定在原设计基础上将后拱后移 0 5m为最佳炉膛尺寸

FURNACE ARCH AIDED DESIGN OF THE TWO-STAGE RECIPROCATING GRATE INCINERATOR

A CFD model based on PHOENICS 3.2 code was built to simulate the working conditions of the two-stage reciprocating grate incinerator.The main goal was to study the effects of furnace arch structure and size on the flow field.The results of the simulation demonstrated that moving the posterior arch backwards can avoid banking,and improve the extent of flame fullness in the chamber.There is an optimal moving distance that can ensure the turbulence at the aperture of larynx and make full use of the radiation and convection of the furnace arch.Based on the conditions of turbulence and velocity of air in the chamber,the posterior arch should be moved back 0.5 m under the original furnace.