水基油墨废水化学絮凝污泥的热解特性及动力学
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摘要
对浮选脱墨污泥及两种絮凝污泥的基本物化性质及热解特性进行了研究,并进一步采用Coats-Redfem法描述了热解过程,计算了三种污泥的热解动力学参数。动力学研究结果表明:三种污泥有机物热解主要区域的反应级数为2,三者的活化能分别为:38.78 kJ/mol、44.59 kJ/mol及48.11 kJ/mol,频率因子分别为:2.58 E+07 min-1、3.19 E+06min-1、1.50 E+06min-1;说明絮凝污泥中的有机物较脱墨污泥稍难热解,且随着絮凝剂用量的增加,热解难度会增加。但是絮凝法处理含油墨废水所产生的污泥量占浮选脱墨污泥8%以下,与焚烧相关的元素含量及发热量测定结果显示其与浮选脱墨污泥也相近,不会对污泥处理系统带来太大的冲击负荷。絮凝污泥完全可以并入企业现有污泥焚烧系统进行消减进行热能回收。
引文
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