Coupling of bromide and on-line mechanical modified fly ash for mercury removal at a 1000 MW coal-fired power plant
Autor: | Tao Wang, Yongzheng Gu, Carlos E. Romero, Shumin Wang, Sun Zhongchun, Yongsheng Zhang, Wei-Ping Pan, Zhao Liu, Jiawei Wang, Xuehai Yu |
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Rok vydání: | 2019 |
Předmět: |
Flue gas
Sorbent Materials science Power station 020209 energy General Chemical Engineering Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology complex mixtures chemistry.chemical_compound Adsorption 020401 chemical engineering Bromide 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering fungi Organic Chemistry technology industry and agriculture respiratory system musculoskeletal system Pulp and paper industry Mercury (element) Fuel Technology chemistry Fly ash Coal fired power plant |
Zdroj: | Fuel. 247:179-186 |
ISSN: | 0016-2361 |
DOI: | 10.1016/j.fuel.2019.03.053 |
Popis: | Modified fly ash is a potential competitive sorbent for flue gas mercury remove in coal-fired power plant. The adsorption characteristics of coal fly ash under different temperature and modification methods were studied. On-line modified fly ash as a sorbent for mercury removal at a coal-fired power plant was carried out. The results of laboratory show that the adsorption performance of a coupled bromide and mechanical modified fly ash was better than that of inherent fly ash and mechanical modified fly ash. Furthermore, it was found that high temperatures are more favorable for mercury adsorption. In a demonstration at a full-scale 1000 MW coal-fired power plant unit, injection of the bromide and mechanical modified fly ash resulted in a decrease of the total concentration of mercury emissions at the stack. Additionally, a decrease in Hg2+ from the SCR to the ESP was found. When injected modified fly ash, the final emission concentration of mercury at the unit outlet reached 1.15 μg/m3, with a mercury emission reduction efficiency of 56.1%. |
Databáze: | OpenAIRE |
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