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1水冷壁的作用与结构型式1.1作用从锅炉的发展史看,对于亚临界压力以下的汽包锅炉的水冷壁是为了保护炉墙,降低它的温度,提高锅炉的运行可靠性,而今天已经成为锅炉的主要蒸发受热面。水冷壁置于炉膛的四周内壁、紧贴着炉墙连续排立,基本上呈立式布置,一般由光管或鳍片管组成。水冷壁的作用主要有:1)保护炉墙,减少煤融渣和辐射的高温对炉墙的破坏作用。锅炉装设了水冷壁后,炉墙的内壁温度大大降低,炉墙的厚度可减小,外墙的壁温可大大降低,使锅炉的散热损失q5减小。
1 The role of water wall and structure type 1.1 The role From the history of the boiler to see, for sub-critical pressure below the drum drum water wall is to protect the furnace wall to reduce its temperature and improve the reliability of the operation of the boiler, and today has been Become the main boiler evaporation heating surface. Water wall placed in the furnace around the inner wall, close to the wall continuous row, basically vertical layout, usually by the light pipe or fin tube. The role of water wall are: 1) to protect the furnace wall to reduce the impact of coal slag and radiation heat damage to the furnace wall. After the water wall is installed in the boiler, the temperature of the inner wall of the furnace wall is greatly reduced, the thickness of the furnace wall can be reduced, the wall temperature of the external wall can be greatly reduced, and the heat loss of the boiler can be reduced.