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Permitted emissions of major air pollutants from coal-fired power plants in China based on best available control technology

Author:
Song, Xiaohui, Jiang, Chunlai, Lei, Yu, Zhong, Yuezhi, Wang, Yanchao
Source:
Frontiers of environmental science & engineering 2018 v.12 no.5 pp. 11
ISSN:
2095-2201
Subject:
air pollutants, air pollution, coal, combustion, emissions, energy industry, nitrogen oxides, normal values, pollution control, power plants, sulfur, sulfur dioxide, China
Abstract:
Based on the activity level and technical information of coal-fired power-generating units (CFPGU) obtained in China from 2011 to 2015, we, 1) analyzed the time and spatial distribution of SO₂ and NOₓ emission performance of CFPGUs in China; 2) studied the impact of installed capacity, sulfur content of coal combustion, and unit operation starting time on CFPGUs’ pollutant emission performance; and 3) proposed the SO₂ and NOₓ emission performance standards for coal-fired power plants based on the best available control technology. Our results show that: 1) the larger the capacity of a CFPGU, the higher the control level and the faster the improvement; 2) the CFPGUs in the developed eastern regions had significantly lower SO₂ and NOₓ emission performance values than those in other provinces due to better economic and technological development and higher environmental management levels; 3) the SO₂ and NOₓ emission performance of the Chinese thermal power industry was significantly affected by the single-unit capacity, coal sulfur content, and unit operation starting time; and 4) based on the achievability analysis of best available pollution control technology, we believe that the CFPGUs’ SO₂ emission performance reference values should be 0.34 g/kWh for active units in general areas, 0.8 g/kWh for active units in high-sulfur coal areas, and 0.13 g/kWh for newly built units and active units in key areas. In addition, the NOₓ emission performance reference values should be 0.35 g/kWh for active units in general areas and 0.175 g/kWh for new units and active units in key areas.
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