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首页> 外文期刊>International Journal of Environmental Science and Technology >Stabilization of galvanic sludge by microwave pre-treated pyrolysis
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Stabilization of galvanic sludge by microwave pre-treated pyrolysis

机译：微波预处理热解法稳定原电池污泥

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摘要

The study was aimed examine the effect of microwave preheated pyrolysis on the characteristics of volatile metal compounds. In order to monitor the behavior of volatile metals, samples were preheated with microwave oven in varying energy ranges and process durations. In order to determine optimum conditions, 360-, 600- and 900-W microwave power and 3-, 5- and 10-min microwave irradiation were used. Chemical analyses of samples were carried out both before and after experiments by X-ray fluorescence. Pyrolysis experiments were performed in a laboratory-scale fixed-bed updraft stainless steel reactor in the presence of 1 L min(-1) N-2 gas. Content of synthetic gas product obtained via pyrolysis was analyzed by a continuous gas analyzer. Microwave preheated pyrolysis resulted an increase in the weight percentage of calcium oxide, iron(III) oxide, and chromium(III) oxide in galvanic sludge. Similar changes were determined for most of the samples at 600 W and 5 min of microwave preheated pyrolysis. In this point, the weight percentage of calcium oxide, iron(III) oxide, and chromium(III) oxide were measured as 22.47, 16.93, and 5.63 wt% which were 19.86, 10.89, and 3.03 wt% after single pyrolysis. It is concluded that, future analysis are needed to increase the efficiency of stabilization by microwave preheated pyrolysis.
机译：该研究旨在检验微波预热热解对挥发性金属化合物特性的影响。为了监测挥发性金属的行为，将样品用微波炉以不同的能量范围和处理时间进行预热。为了确定最佳条件，使用了360、600和900 W微波功率以及3、5和10分钟的微波辐射。通过X射线荧光在实验前后对样品进行化学分析。在1 L min（-1）N-2气体的存在下，在实验室规模的固定床上升气流不锈钢反应器中进行了热解实验。通过热解获得的合成气产物的含量通过连续气体分析仪进行分析。微波预热裂解导致原污泥中氧化钙，氧化铁（III）和氧化铬（III）的重量百分比增加。对于大多数样品，在600 W和5分钟的微波预热热解条件下，确定了相似的变化。在这一点上，经一次热解后，测得氧化钙，氧化铁（III）和氧化铬（III）的重量百分比为22.47、16.93和5.63重量％，分别为19.86、10.89和3.03重量％。结论是，需要进行进一步的分析以提高微波预热裂解的稳定效率。

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