Effect of Flue Gas Pollution Control Devices on Mercury Emission from Coal-Fired Power Plants

2013 ◽  
Vol 726-731 ◽  
pp. 2160-2164
Author(s):  
Ying Jie Shi ◽  
Shuang Deng ◽  
Fan Zhang ◽  
Chen Zhang ◽  
Qing Cao ◽  
...  
Keyword(s):  
Flue Gas ◽  
Pollution Control ◽  
Power Plants ◽  
Mercury Content ◽  
Air Pollution Control ◽  
Emission Data ◽  
Fgd Gypsum ◽  
Control Devices ◽  
Air Pollution Control Devices ◽  
Stack Gas

Coal-fired power plant is one of the largest sources of mercury emitted into the atmosphere artificially. In the paper, more intensive investigations were performed in 27 power plants for observing distribution of mercury at all the effluents. Mass balance of mercury was figured out from the emission data and analysis results of mercury at all the in- and out-streams. The results show that, concentrations of mercury emitted from stack gas equipped with air pollution control devices (APCDs) range between 0.6734 and 14.4312μg/m3 with coal mercury content lower than 0.20mg/kg. FGD gypsum mercury is about 2~10 times as that of in coal. The average mercury removal efficiency by ESP is only about 29.36% while ESP +wFGD and dry-FGD+FF about 68.72% and 81.51% separately. Therefore, it is necessary to enhance the existing APCDs, wash and mix coal to Hg co-removal for coal-fired power plants.

Mercury co-beneficial capture in air pollution control devices of coal-fired power plants

2017 ◽  
Vol 170 ◽  
pp. 48-53 ◽  
Author(s):  
Deepak Pudasainee ◽  
Yong-Chil Seo ◽  
Jin-Ho Sung ◽  
Ha-Na Jang ◽  
Rajender Gupta
Keyword(s):  
Air Pollution ◽  
Pollution Control ◽  
Power Plants ◽  
Air Pollution Control ◽  
Control Devices ◽  
Air Pollution Control Devices

scholarly journals Mercury in Bituminous Coal Used in Polish Power Plants

2016 ◽  
Vol 61 (3) ◽  
pp. 473-488 ◽  
Author(s):  
Piotr Burmistrz ◽  
Krzysztof Kogut
Keyword(s):  
Coal Combustion ◽  
Emission Factor ◽  
Power Plants ◽  
Calorific Value ◽  
Mercury Content ◽  
Air Pollution Control ◽  
The European Union ◽  
Mercury Emission ◽  
Control Devices ◽  
Air Pollution Control Devices

Abstract Poland is a country with the highest anthropogenic mercury emission in the European Union. According to the National Centre for Emissions Management (NCEM) estimation yearly emission exceeds 10 Mg. Within that approximately 56% is a result of energetic coal combustion. In 121 studied coal samples from 30 coal mines an average mercury content was 112.9 ppb with variation between 30 and 321 ppb. These coals have relatively large contents of chlorine and bromine. Such chemical composition is benefitial to formation of oxidized mercury Hg2+, which is easier to remove in Air Pollution Control Devices. The Hgr/Qir (mercury content to net calorific value in working state) ratio varied between 1.187 and 13.758 g Hg · TJ−1, and arithmetic mean was 4.713 g Hg · TJ−1. Obtained results are close to the most recent NCEM mercury emission factor of 1.498 g Hg · TJ−1. Value obtained by us is more reliable that emission factor from 2011 (6.4 g Hg · TJ−1), which caused overestimation of mercury emission from energetic coal combustion.

Experiments on the Removal of Fine Particles in Existing Air Pollution Control Devices by Chemical Agglomeration

2014 ◽  
Vol 1010-1012 ◽  
pp. 756-760 ◽  
Author(s):  
Yong Liu ◽  
Lin Jun Yang ◽  
Dan Ping Pan ◽  
Rong Ting Huang
Keyword(s):  
Flue Gas ◽  
Pollution Control ◽  
Fine Particles ◽  
Electrostatic Precipitator ◽  
Average Diameter ◽  
Flue Gas Desulfurization ◽  
Air Pollution Control ◽  
Control Devices ◽  
Air Pollution Control Devices ◽  
Wetting Liquid

The removals of PM2.5from coal combustion by electrostatic precipitator (ESP) and wet flue gas desulfurization (WFGD) system with adding chemical agglomeration solution were investigated experimentally based on coal-fired thermal system. The experimental results show that the average diameter of particles could grow more than four times with the effect of wetting, liquid bridge force and adsorption bridging, and the PM2.5concentration of ESP outlet can decrease 40% under typical flue gas conditions. The removal efficiency of fine PM2.5is improved about 30% when adding chemical agglomeration solution before desulfurization tower.

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