前言火力发电厂为了预防因锅炉水冷壁管内部结垢引起的事故,过去都是靠化学清洗定期将水垢清除。这种化学清洗费用昂贵,而且必须考虑清洗废液的处理问题,因此确定判断化学清洗周期的依据,把清洗次数减至必要的最低限度就是一件很重要的事。关于这一课题,日本各电力公司和中央电力研究所通过研究会、座谈会的形式进行了长时期的探讨,提出了不少有关如何适当确定锅炉化学清洗时间的研究报告。这些成 Preface Thermal power plant in order to prevent accidents caused by the internal scaling of boiler water wall tube, in the past are by chemical cleaning regularly scale removal. This type of chemical cleaning is expensive and must account for the problem of cleaning the waste liquor. Therefore, it is important to identify the basis for judging the chemical cleaning cycle and to reduce the number of washes to the minimum necessary. On this subject, various power companies in Japan and the Central Electric Power Research Institute conducted a long-term discussion through seminars and symposiums and put forward many research reports on how to properly determine the chemical cleaning time of boilers. These into