锅炉化学清洗液中柠檬酸浓度测定的新方法  

A NEW METHOD FOR DETERMINING CONCENTRATION OF CITRIC ACID IN CHEMICAL CLEANING LIQUID FOR BOILERS

作　　者：张祥金[1] 陈浩[1] 倪瑞涛[1] 邓宇强[1] 祁东东[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2012年第7期74-76,共3页Thermal Power Generation

摘　　要：提出了一种新的测定锅炉柠檬酸化学清洗液中柠檬酸浓度的方法。采用阳离子树脂置换柠檬酸锅炉清洗液中的NH4+、Fe3+、Fe2+等阳离子后,测定交换液中的柠檬酸总浓度,并根据清洗液中全铁离子含量计算出游离柠檬酸浓度。该法测定的回收率大于96%,操作简单快捷、重现性好,可准确反映清洗液中柠檬酸的浓度,满足实际锅炉化学清洗测定的要求。A new method for determining concentration of citric acid in chemical cleaning liquid for boilers has been put forward.After displacing cation ions NH+4,Fe3+,and Fe2+ etc.in citric acid chemical cleaning liquid for boilers by using cationic exchange resin,the total concentration of citric acid in exchanged liquid is then being determined,and the concentration of free citric acid being calculated according to the total content of iron ions in the cleaning liquid.By using the said method,the measured recovery rate is greater than 96%,the operation is simple and rapid,boasting good reproducibility,being capable to accurately reflect the concentration of cirtric acid in cleaning liquid,satisfying the requirement in field testing during the time of chemical cleaning for boilers.

关 键 词：锅炉 化学清洗 柠檬酸测定 阳离子树脂 

分 类 号：TM621.8[电气工程—电力系统及自动化]