Abstract During coal and coal gangue combustion, many heavy metal pollutants are emitted and cause serious environmental problems. In this paper, the environmental effect values of As and Pb emission during coal gangue and coal combustion in the 330 MW pulverized coal boiler, 50 kW circulated fluidized bed boiler and laboratory were calculated by ReCiPe2016. The results show that when coal combustion in 330 MW pulverized coal boiler, the environment effect values of as for bottom slag, fly ash and flue gas are 3.28×10−6, 2.68×10−5 and 3.89×10−3 respectively; while the environment effect value of Pb for bottom slag, fly ash and flue gas are 8.57×10−6, 6.00×10−5 and 4.83×10−2, respectively. The environmental effects of As and Pb in bottom slag are lower than those in the fly ash; and the environmental effects of As and Pb on air are higher than those on soil. Moreover, when coal combustion in the 50 kW circulated fluidized boiler, the effect values of As and Pb in fly ash on environment are 3.26×10−5 and 1.28×10−4; and the effect values of As and Pb in bottom slag are 1.16×10−6 and 1.43×10−5 respectively. The results also show that when coal gangue combustion in the laboratory, the effect values of As and Pb emission increase with increasing of the temperature; and the proportions of total environmental effects of As and Pb on air are higher than those on soil. Besides that, this study also indicates that the effect of Pb emitted into environment is higher than that of As at the same conditions during coal combustion both in circulated fluidized boiler and pulverized coal boiler. The results may provide basic data for predicting the environmental effects of As and Pb during coal gangue combustion in circulating fluidized bed for life cycle impact assessment.

中文翻译：

---

ReCiPe2016生命周期影响评价研究煤矸石和煤燃烧中重金属的环境影响

摘要 煤炭和煤矸石燃烧过程中会排放大量重金属污染物，造成严重的环境问题。本文通过ReCiPe2016计算了330 MW煤粉锅炉、50 kW循环流化床锅炉和实验室在煤矸石和煤燃烧过程中As和Pb排放的环境影响值。结果表明，330 MW煤粉锅炉燃煤时，底渣、粉煤灰和烟气的环境影响值分别为3.28×10-6、2.68×10-5和3.89×10-3；Pb对底渣、粉煤灰和烟气的环境影响值分别为8.57×10-6、6.00×10-5和4.83×10-2。底渣中As和Pb对环境的影响低于飞灰；As和Pb对空气的环境影响高于对土壤的影响。此外，50kW循环流化锅炉燃煤时，飞灰中As和Pb对环境的影响值分别为3.26×10-5和1.28×10-4；底渣中As和Pb的影响值分别为1.16×10-6和1.43×10-5。结果还表明，实验室煤矸石燃烧时，As和Pb排放的影响值随着温度的升高而增加；并且As和Pb对空气的总环境影响的比例高于土壤。此外，本研究还表明，在相同条件下，循环流化锅炉和煤粉锅炉在燃煤过程中向环境排放的铅的影响要高于砷的影响。