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在我国超临界及以上参数锅炉的内部检验工作中,水冷壁一直是检验工作的重点之一。检验中发现有鳍片开裂或过烧、水冷壁管吹损、燃烧器喷口烧损、高温腐蚀、等缺陷较为常见。本文通过对某电厂一台切圆锅炉的炉膛内速度场和温度场的数值模拟,从炉膛内烟气动力场的角度分析了上述较为常见缺陷产生的原因及易出现的位置,从而提出水冷壁的检验重点,以达到优化检验方案的目的。1数值模拟模型
In China’s supercritical and above parameters of the boiler internal inspection work, the water wall has always been one of the focus of inspection. Found in the test cracking fins or over-burning, water-cooled wall tube blowing, burner nozzle burning, high temperature corrosion, and other defects are more common. Based on the numerical simulation of the velocity field and the temperature field in a furnace of a tangentially fired boiler in a power plant, the causes of the above common defects and their easy location are analyzed from the perspective of the flue gas dynamic field in the furnace. The test focus, in order to achieve the purpose of optimizing the inspection program. 1 Numerical simulation model