导热油使用时应该怎样进行检测分析？

    1、粘度：粘度变化一般表明系统内的导热油受到污染，热裂解和氧化降解程度。当变化率大于15%时，应当引起重视。

    2、闪点：闪点变化表明系统内有低沸物生成，当变化率大于20%时，应当引起重视。

    3、酸值：酸值变化表明系统内导热油被污染或被氧化，当酸值达到0.5mgKOH/g时，应引起重视。

    4、残炭：残炭增大一般表明来自脏物、腐蚀物、严重氧化或严重热烈解所造成，当达到1.5%时，应引起重视。

    检测结果出来后，如各项指标均未超出变化范围，说明导热油运行良好；如果一项或多项超出范围，应当考虑采取措施，部分或全部更换导热油，使导热油恢复良好状态。

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