1、锅炉水垢形成的内因及外部条件锅炉运行一定时间以后,往往在锅筒及管壁上粘附一层灰白色硬皮,称为水垢。水垢形成的主要原因是由于锅炉给水中含有溶解度较小的钙镁盐类(即所谓的硬度)。这种盐类有其共同特牲:溶解度较小;溶解度随水温升高而下降;易发生变化,变成难溶的盐类。只要具备一定的外部条件,就会产生水垢或沉渣。主要是: 1, the internal and external conditions of the boiler scale formation After the boiler is running for a certain period of time, often in the drum and tube wall adhesion of a layer of gray crust, called scale. The main reason for the formation of scale is due to the boiler feed water contains less soluble calcium magnesium salts (so-called hardness). This salt has its own special characteristics: solubility is small; solubility decreases with increasing water temperature; easy to change, into insoluble salts. As long as there is a certain external conditions, it will produce scale or sediment. mainly: