燃煤电厂固体废弃物中汞分布特征及排放量估算
Mercury distribution in solid waste and mercury emission estimation from coal-fired power plants
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摘要: 采用湿法消解,原子荧光光谱法测定了5个燃煤电站入炉煤、粉煤灰、炉渣和脱硫石膏中汞的含量,分析探讨了汞在燃煤及不同固体废物中的分布特征.采用质量平衡模型(MB)、修正因子模型(EMF)和烟气计算模型(FC)分别对以上电站的汞排放量进行了估算,并对不同方法得到的排放量进行了对比.研究结果显示,3种方法所得汞排放量结果差距明显,亟需建立更加完善的燃煤电站汞污染排放模型.Abstract: The concentrations of mercury in coal, fly ash, slag and gypsum were determined by atomic fluorescence spectrometry after wet digestion. The distribution characteristics of mercury in various waste and coal samples were studied and discussed. Three estimation models including Mass Balance(MB) model, Emission Modification Factors(EMF) model, and Flue Calculation(FC) model were applied to calculate the emission amounts of mercury from five coal fired power plants. The calculated emission amounts generated from three models were compared and discussed. The results indicated that the values from different models for the same plant varied significantly. It is urgent to develop more effective and practical models for mercury emission estimation.
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Key words:
- coal-fired power plant /
- mercury emission /
- estimation.
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