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用投影法计算喷口出口和炉内空气动力场 ,用蒙特卡洛法计算了炉内的辐射换热 ,用有限差分法计算了对流换热和导热 ,最后求解出炉内的温度分布。数值试验结果表明 ,采用导流板式煤粉燃烧器 ,可有效减小炉内切圆直径 ,降低水冷壁附近的温度水平 ,防止炉内结渣的发生。在某 30 0 MW机组上的成功应用 ,验证了本数值试验的正确性。该方法的提出为解决大型电站锅炉炉内结渣问题提供了一条行之有效的途径。
The outlet of the nozzle and the aerodynamic field inside the furnace were calculated by projection method. The radiation heat transfer in the furnace was calculated by Monte-Carlo method. The convection heat transfer and thermal conductivity were calculated by the finite difference method. Finally, the temperature distribution in the furnace was solved. The numerical results show that the baffled pulverized coal burner can effectively reduce the tangential diameter of the furnace, reduce the temperature near the water wall and prevent the occurrence of slagging in the furnace. The successful application on a 300 MW unit verifies the correctness of this numerical test. The proposed method provides an effective way to solve the problem of slagging in large power station boiler.