大家知道水垢、灰垢都是热的不良导体,它们的导热系数都非常之低。水垢的导热系数仅为钢材导热系数的几十分到几百分之一,而灰垢的导热系数却只是钢材的几百分之一,可见灰垢的导热情况比水垢更加低劣和困难。锅炉在运行当中,由于燃料的燃烧,受热面上难免要附着一层灰垢,根据燃料品种及燃烧状况的不同,灰垢的附着厚度、坚硬程度也不一样。锅炉一旦结有灰垢,首先金属的传热效果恶化,燃料的消耗增加;其次锅炉的排烟温度 We all know that scale, gray scale are bad conductors of heat, their thermal conductivity is very low. The thermal conductivity of scale is only a few dozen to a few hundredth of the thermal conductivity of steel, while the thermal conductivity of gray scale is only a few hundredth of steel, showing that the thermal conductivity of gray scale is more inferior and difficult than the scale. Boiler operation, due to the combustion of fuel, the surface will inevitably be attached to a layer of gray scale, depending on the fuel species and combustion conditions, gray scale adhesion thickness, hardness is not the same. Once the end of the boiler ash scale, first of all metal heat transfer deteriorated, fuel consumption increased; followed by the boiler exhaust gas temperature