我国电力工业的迅速发展,向我们提出了设计、制造大容量亚临界电站锅炉的任务。各国亚临界电站锅炉的运行经验证明,炉膛内高热负荷区(例如燃烧器附近)的蒸发管中常易产生膜态沸腾。尤其是燃油锅炉上,局部热负荷高达400×10~3大卡/米~2以上,更易产生膜态沸腾。一旦膜态沸腾产生,管壁的传热显著恶化,管壁温度急剧上升,严重威胁到锅炉的安全运行。 The rapid development of China’s power industry has given us the task of designing and manufacturing large capacity subcritical power station boilers. Operating experience of sub-critical power station boilers in various countries has proved that membrane boiling is often easily generated in the evaporation tubes in high load areas (such as near burners) in the furnace. Especially on oil-fired boilers, the local heat load is up to 400 × 10 ~ 3 kcal / m ~ 2, which is more likely to cause membrane boiling. Once the film boiling occurs, the heat transfer of the pipe wall is significantly deteriorated, and the temperature of the pipe wall rises sharply, which seriously threatens the safe operation of the boiler.