DISTRIBUTION AND EMISSION CHARACTERISTICS, MIGRATION AND RELEASE REGULATION OF MERCURY IN A 600 MW COAL-FIRED POWER PLANT

WANG Wen-hui

doi:10.13205/j.hjgc.202006032

Volume 38 Issue 6

Aug. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(6): 195-201

WANG Wen-hui. DISTRIBUTION AND EMISSION CHARACTERISTICS, MIGRATION AND RELEASE REGULATION OF MERCURY IN A 600 MW COAL-FIRED POWER PLANT[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 195-201. doi: 10.13205/j.hjgc.202006032

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WANG Wen-hui. DISTRIBUTION AND EMISSION CHARACTERISTICS, MIGRATION AND RELEASE REGULATION OF MERCURY IN A 600 MW COAL-FIRED POWER PLANT[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 195-201. doi: 10.13205/j.hjgc.202006032

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DISTRIBUTION AND EMISSION CHARACTERISTICS, MIGRATION AND RELEASE REGULATION OF MERCURY IN A 600 MW COAL-FIRED POWER PLANT

doi: 10.13205/j.hjgc.202006032

WANG Wen-hui

Hulunbuir Enironmental Monitoring Center Station, Hunlunbeir 021008, China

Received Date: 2019-08-30

Abstract

Abstract

In order to characterize the Hg distribution characteristics, migration and its release rules of a 600MW unit ultra-low emission coal-fired power, field measurement research was conducted in this paper. The results showed that, the mean value of Hg content in coal was 310μg/kg, and the distribution coefficients of Hg in slag, fly ash, gypsum, waste water and flue gas were 1.9%, 37.5%, 34.6%, 0.8% and 24.8%, respectively. The removal efficiency of Hg in the whole flue gas treatment system was 74.7%, and final total Hg emission was 6.0 μg/m³. The conversion efficiency of SCR and flue gas cooler on Hg⁰ were 44.2% and 30.4%, respectively. The removal efficiency of Hg^P in LL-ESP was nearly 100%, and the removal efficiency of Hg²⁺ in WFGD was 80.7%. The primary release of Hg from the power plant was 783 kg/a (with atmospheric emission of 188 kg/a), and the secondary release was 334 kg/a. This paper could provide references for the release of Hg emission control standards and selection of control technologies for coal-fired power plants.
- coal-fired power plant,
- ultra-low emission,
- Hg,
- distribution characteristics,
- migration rules,
- release rules

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