Citation: Tian GAO, Ri-hong XIAO, Xing CHUAI, Zhuo XIONG, Geng WEI, Tie LI, Kai YANG, Guo LI, Yong-chun ZHAO, Jun-ying ZHANG. Study on mercury emission characteristics of circulating fluidized bed boiler and pulverized coal boiler[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(3): 275-282. doi: 10.19906/j.cnki.JFCT.2021075 shu

Study on mercury emission characteristics of circulating fluidized bed boiler and pulverized coal boiler

Tian GAO ^1, ,
Ri-hong XIAO ¹ ,
Xing CHUAI ¹ ,
Zhuo XIONG ¹ ,
Geng WEI ² ,
Tie LI ² ,
Kai YANG ² ,
Guo LI ² ,
Yong-chun ZHAO ^1,, ,
Jun-ying ZHANG ¹

1.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
2.
Key Laboratory for Clean Combustion and Flue Gas Purification of Sichuan Province (Dongfang Boiler Co., Ltd., Dongfang Electric Group), Zigong 643099, China

Corresponding author: Yong-chun ZHAO, yczhao@hust.edu.cn
Received Date: 8 July 2021
Revised Date: 1 August 2021

Figures(9)

A 600 MW circulating fluidized bed boiler power plant and a 1000 MW pulverized coal boiler power plant were selected to study mercury migration, transformation and emission characteristics. The mercury concentration in flue gas was sampled by EPA 30B method, and the solid and liquid samples such as furnace-incoming coal, fly ash, bottom slag, limestone, process water, desulfurization gypsum and desulfurization wastewater were collected for analysis. The synergetic effect of existing pollutant control devices on mercury removal in two power plants was studied, and the migration and transformation law of mercury was discussed. After the flue gas of the two power plants passes through APCDs, the total mercury removal rate reaches over 88%, and the final mercury concentrations of the flue gas are 1.85 and 1.10 μg/m³, which are far lower than the national requirements. Under the existing equipment conditions, the ultra-low mercury emission can be realized.
- coal-fired power plant,
- mercury,
- circulating fluidized bed,
- pulverized coal boiler,
- migration and transformation
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