空气预热器冷端换热元件的搪瓷改造

Reformation of cool terminal heat exchange elements of air heater using enameled elements

燃用高硫煤的锅炉会不可避免地产生空气预热器的冷端腐蚀,甚至会使空气预热器换热元件产生严重损坏和出现堵塞,导致烟道差压过大,造成送引风机失速,甚至停炉。对空气预热器冷端换热元件进行搪瓷改造后,从根本上解决了冷端腐蚀问题。

The cool terminal corrosion of air heater is occurred unavoidably in sulfur coal-fired boiler;even,the heat exchange element could be badly damaged and blocked;and this could cause the overlarge pressure difference of gas duct and the induced draft fan stalling,even cause the boiler shut-down.The heat exchange elements were replaced by enameled elements.After the reformation,the problem of cool terminal corrosion was solved fundamentally.