1、前言为了提高发电效率,降低运行管理费用以及延长设备寿命,火力发电厂等的锅炉水质管理是重要的运行作业之一。为此,过去一直进行与发电规模相适应的合理的水质管理。目前,随着火力发电厂合理化运动的进展,趋向于用高效率的直流式锅炉代替老的汽包式锅炉,又由于锅炉大型化达到超临界压力之后,水 1, Introduction In order to improve power generation efficiency, reduce operating costs and extend equipment life, boiler water quality management of thermal power plants is one of the important operations. Therefore, in the past, reasonable water quality management adapted to the scale of power generation has been carried out. At present, with the progress of the rationalization of thermal power plants, it tends to replace the old drum-type boilers with high-efficiency DC boilers. Since large-scale boilers have reached supercritical pressure, water