研究报告
王凤炜,付建英,林晓青,陈彤,詹明秀.钢铁冶炼行业二英排放特性和厂区内大气中二英分布规律[J].环境科学学报,2018,38(4):1404-1409
钢铁冶炼行业二英排放特性和厂区内大气中二英分布规律
- The emission characteristics of dioxins from steel industry and distribution of dioxins in the atmosphere of plant
- 基金项目：国家自然科学基金（No.51476138）
- 作者
- 单位
- 王凤炜
- 天津市环境监测中心, 天津 300000
- 付建英
- 中国联合工程公司, 杭州 310052
- 林晓青
- 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027
- 陈彤
- 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027
- 詹明秀
- 中国计量大学计量测试工程学院, 杭州 310018
- 摘要：对我国某市6家钢铁企业烟气中的二英（PCDD/Fs）污染水平和排放特性做了初步研究，同时对厂区内大气中的二英浓度水平进行了分析.结果表明，6家钢铁企业中，铁矿石烧结炉排放的二英浓度远高于炼钢精炼炉，烧结炉二英排放浓度为0.098~3.6 ng·Nm-3（以I-TEQ计），2个炼钢精炼炉烟气中二英的浓度分别为0.0037和0.078 ng·Nm-3（以I-TEQ计），烟气排放达标率为66.67%.6家钢铁企业厂区内大气环境中的二英浓度变化范围为0.17~0.69 pg·m-3（以I-TEQ计），平均值为0.41 pg·m-3（以I-TEQ计），其中有两家企业略高于大气质量二英的推荐值.对烟气和大气中17种有毒二英的分布进行对比分析发现，污染源和大气中二英分布具有相似的指纹特性，推测厂区内大气中二英分布主要与污染源排放有关.
- Abstract：The emission level and characteristics of dioxins from 6 steel plants were investigated as well as the concentration of dioxins in the surrounding atmosphere. The results showed that the concentration of dioxins emitted from the sintering furnace were much higher than that of the refining furnaces. In detail, the concentrations of dioxins ranged from 0.098~3.6 ng·Nm-3 (as I-TEQ) for sintering furnaces. Moreover, the concentrations of dioxins were 0.0037 and 0.078 ng·Nm-3 (as I-TEQ) for the other two refining furnaces. Furthermore, only 66.67% of flue gas samples met the dioxin emission standard for steel industry. The concentrations of dioxins in the surrounding atmosphere ranged from 0.17 to 0.69 pg·m-3(as I-TEQ) with the average value of 0.41 pg·m-3(as I-TEQ), and two of them exceeded the recommended value. The similar fingerprints of 17 toxic dioxins were observed in the flue gas and surrounding atmosphere. It is speculated that the distribution of dioxins in the atmosphere is mainly related to the emission of pollution sources.
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