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Citation: ZHANG Kai-hua, ZHANG Kai, PAN Wei-ping. Emission characteristics of arsenic and mercury from a 300 MW coal-fired power plant[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(7): 839-844. shu

Emission characteristics of arsenic and mercury from a 300 MW coal-fired power plant

  • 1.

    1. Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, Department of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, China;

  • Corresponding author: ZHANG Kai-hua, 
  • Received Date: 1 June 2013
    Available Online: 24 June 2013

    Fund Project: 中央高校基本科研业务费专项资金(13QN11). (13QN11)

  • An emissions studies for arsenic and mercury were conducted at a 300 MW coal-fired power plant. The solid streams such as coal, bottom ash and ESP ash were collected, and the arsenic and mercury in the flue gas around ESP were aslo directly sampled using Ontario Hydro Method and then tested. The results show that the arsenic concentration in fly ash is about 6.68×10-6, which is almost 2.5 times as that in coal, nevertheless that in bottom ash is only 1.70 ×10-6. Its concentration in the flue gas is 153.27 and 41.13 μg/m3 before and after ESP, respectively. The mercury concentration in coal, fly ash and bottom ash is about 2.5×10-7, 1.9×10-7 and 1.5×10-7 respectively, its concentration in the flue gas before and after ESP was about 5.49 and 5.21 μg/m3. Arsenic is significantly concentrated in fly ash, whereas mercury is not. ESP unit has obvious synergistic effect on arsenic removal up to 71%, while it is not obvious for mercury removal.
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