| 西南地区新型干法水泥生产中的二(口恶)英大气排放 |
| 摘要点击 3056 全文点击 1156 投稿时间：2013-04-18 修订日期：2013-05-23 |
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| 中文关键词 水泥窑 二(口恶)英 排放因子 固体废物 大气排放 |
| 英文关键词 cement kilns dioxin emission factor solid waste atmospheric emission |
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| 中文摘要 |
| 采用现场监测方式调查了西南地区6家干法水泥窑废气中PCDD/Fs排放情况. 结果表明，未协同处置废物的水泥生产企业PCDD/Fs排放浓度范围（以TEQ计）为0.0029~0.0062 ng·m-3，平均0.0043 ng·m-3；添加污泥作为原料和燃料的水泥企业的PCDD/Fs排放水平为0.028 ng·m-3. 所有水泥窑的二(口恶)英浓度都明显低于我国水泥工业大气污染物排放标准（0.1 ng·m-3）. 6家水泥企业PCDD/Fs排放因子为0.0089~0.084 μg·t-1，接近或低于UNEP发布的水泥行业最低排放因子（0.05 μg·t-1）；其中协同处置污泥水泥窑的最高，约为其他5家平均排放因子（0.011μg·t-1）的7.6倍. 另外，两类水泥窑废气PCDD/F异构体分布特征存在明显差异. 结果表明，采用现代预热干法工艺的水泥企业的二(口恶)英排放水平较低，可进一步开发我国水泥企业协同处置废物的能力. |
| 英文摘要 |
| Six cement kilns were measured for emissions of PCDD/Fs in the Southwest Area,China. The results indicated that the emission levels of PCDD/Fs were 0.0029-0.0062 ng·m-3(Average, 0.0043 ng·m-3) from cement kilns which did not burn solid waste, and 0.028 ng·m-3 from co-processing sewage sludge in cement kiln. The levels of PCDD/Fs emissions from cement manufacturing in the Southwest Area were significantly below the national emissions standard (0.1 ng·m-3). Emission factors of PCDD/Fs from the six cement kilns varied between 0.0089 and 0.084 μg·t-1 cement, which were near or below the lowest emission factor reported by UNEP in 2005.Moreover, the emission factor of PCDD/Fs from co-processing sewage sludge in cement kiln was 7.6 times of the average factors from the other five cement kilns. Moreover,congener distribution of PCDD/F in stack gas from the two types of cement kilns was very different. The results showed that modern dry process cement kilns with preheating have lower emissions of PCDD/Fs. This suggested that the product of co-processing solid waste in cement kilns should be largely enhanced in China in future. |
