| 等离子体技术在处理垃圾焚烧飞灰中的应用研究 |
| 摘要点击 3088 全文点击 2105 投稿时间：2007-04-17 修订日期：2007-05-28 |
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| 中文关键词 城市生活垃圾 飞灰 等离子体发生器 熔融固化 熔渣 二英 重金属 |
| 英文关键词 MSW fly ash plasma torch vitrification vitrified slag PCDD/Fs heavy metal |
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| 中文摘要 |
| 对飞灰进行TCLP重金属浸出试验，发现重金属Cd的浸出浓度达到0.322?5 mg/L，高出国家规定的毒性浸出标准（Cd：0.3 mg/L），采用美国EPA规定的1613方法分析飞灰中的二英含量，其毒性当量I-TEQ为0.45 ng/g.利用直流双阳极等离子体电弧对飞灰进行熔融处理，对得到的熔渣进行分析，结果表明，飞灰经过熔融处理后，重金属的浸出浓度得到很好的控制，远低于毒性浸出标准，飞灰中的二英毒性当量I-TEQ接近91.6%被降解消除，得到的熔渣呈非结晶质的玻璃质结构，具有非常致密的微观结构. |
| 英文摘要 |
| TCLP analysis (USEPA method 1311) was employed on fly ash in order to analyze the metals leachability and the concentration of cadmium was 0.322?5 mg/L which exceeded state TCLP standard(0.3 mg/L). According to USEPA method 1613, I-TEQ of PCDD/Fs in fly ash was 0.45 ng/g. Then a double arcs DC plasma torch was developed to vitrified fly ash. And the results showed that heavy metals were mostly immobilized in the vitrified slag and also I-TEQ of PCDD/Fs in fly ash was destroyed near 91.6%. The morphology of vitrified slag was amorphous state which showed the glassy slag of SiO2 and the microstructure of slag was very compact. |
