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KZG2-8锅炉是笔者单位一台卧式快装锅炉,于1988年5月投入使用,主要用于生产、生活用汽。到1998年5月,因多种原因,锅炉结垢厚度达1mm以上,结垢覆盖面积达80%以上,已无法保证锅炉安全运行。为此,笔者决定使用化学清洗方式除垢,在化学清洗除垢之前,笔者编制了《锅炉化学清洗调查方案》及《锅炉化学清洗方案》。清洗工艺方案大致如下:1)水冲洗:冲洗到锅炉出口水澄清为止。2)盐酸酸洗:盐酸溶液的浓度为6%。缓蚀剂为六次甲基四胺,浓度为6%。3)酸洗结束后用水冲洗,pH值控制在4.5左右。
KZG2-8 boiler unit is a horizontal fast boiler, put into use in May 1988, mainly for the production and use of domestic steam. By May 1998, for a variety of reasons, boiler fouling thickness of 1mm or more, fouling coverage of more than 80%, can no longer guarantee the safe operation of the boiler. To this end, I decided to use chemical cleaning descaling, chemical cleaning descaling, the author prepared a “boiler chemical cleaning survey program” and “boiler chemical cleaning program.” Cleaning process program is as follows: 1) water flushing: rinse until the boiler outlet water clarified. 2) hydrochloric acid pickling: hydrochloric acid solution concentration of 6%. The inhibitor is hexamethylenetetramine at a concentration of 6%. 3) rinse with water after acid pickling, pH control at 4.5 or so.