Source Journal of CSCD
Source Journal for Chinese Scientific and Technical Papers
Core Journal of RCCSE
Included in JST China
Volume 42 Issue 4
Apr.  2024
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Article Contents
REN Jiahao, XIAO Bin, CHEN Yizhen, ZHANG Kai, ZHAO Yuxi. ASSESSMENT OF IMPACT OF STACK HEIGHT CHANGES OF COAL-FIRED POWER PLANTS ON AIR QUALITY AND ITS IMPLICATIONS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 66-73. doi: 10.13205/j.hjgc.202404008
Citation: REN Jiahao, XIAO Bin, CHEN Yizhen, ZHANG Kai, ZHAO Yuxi. ASSESSMENT OF IMPACT OF STACK HEIGHT CHANGES OF COAL-FIRED POWER PLANTS ON AIR QUALITY AND ITS IMPLICATIONS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 66-73. doi: 10.13205/j.hjgc.202404008

ASSESSMENT OF IMPACT OF STACK HEIGHT CHANGES OF COAL-FIRED POWER PLANTS ON AIR QUALITY AND ITS IMPLICATIONS

doi: 10.13205/j.hjgc.202404008
  • Received Date: 2023-09-01
    Available Online: 2024-06-01
  • After the full implementation of ultra-low emission in coal-fired power plants, whether it is still necessary to adopt high stack emission has aroused extensive discussion. In this study, taking the Yiyang Power Plant as an example, the impact of six scenarios based on two emission heights (210 m, 60 m) on the concentrations of air pollutants at the state-controlled monitoring sites in Yiyang were simulated using the AERMOD model. The results showed that in both typical and unfavorable meteorological years, the temporary chimney with a height of 60 m has an adverse effect on the concentrations of air pollutants at each monitoring site, compared to the original chimney with a height of 210 m, resulting in an increase in the maximum daily concentrations of each pollutant in the range of 8.82 μg/m3 to 20.19 μg/m3, and an increase in the maximum annual concentrations of each pollutant in the range of 0.91 to 2.08 μg/m3, and the effect in unfavorable meteorological years was generally greater than that in typical meteorological years. At the same time, the change in emission altitude also has an important effect on the maximum occupancy rate of pollutants and the number of days of pollution exceedance in Yiyang. The maximum occupancy rate of NO2 and PM2.5 increased significantly, and the number of days of particulate matter exceedance increased by more than or equal to 2 days in several monitoring sites. Because coal-fired power generation is still the dominant power source of China, as well as the urgent need for air quality improvement, a significant reduction in the height of emission stacks should be considered prudently.
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