Experimental study on trace elements emission characteristics in coal-fired circulating fluidized bed

被引：0

作者：

Zhao S. ^{[1
]}

Duan Y. ^{[1
]}

Zhou Q. ^{[1
]}

Zhang J. ^{[1
]}

Du H. ^{[1
]}

Tang H. ^{[1
]}

Lü J. ^{[1
]}

机构：

[1] Key Laboratory of Energy Conversion and Control of Ministry of Education (Southeast University), Nanjing, 210096, Jiangsu Province

来源：

Duan, Yufeng (yfduan@seu.edu.cn) | 1600年 / Chinese Society for Electrical Engineering卷 / 37期

基金：

中国国家自然科学基金;

关键词：

Circulating fluidized bed; Coal combustion; Emission characteristics; Improved relative enrichment index; Trace elements;

D O I：

10.13334/j.0258-8013.pcsee.151911

中图分类号：

学科分类号：

摘要：

The distribution and enrichment characteristics in bottom ash, fly ash and flue gas of 10 trace elements As, Cd, Pb, Sb, Cr, Mn, Co, Cu, Mo, Ba as well as their emission concentrations were studied on a 50kW circulating fluidized bed bench by burning Xiaolongtan lignite (limestone sorbent was included). The US EPA Method 29 was used for trace elements sampling and analysis. The results show that mass balance rates of trace elements are in the range of 95%~125%, which indicates experimental results have good reliability. Trace elements are mainly distributed in the bottom ash and fly ash, while gaseous trace elements account for little proportion (<0.05%). These 10 trace elements are belonged to the semi-volatile element, which have the trend enriching in fly ash but dissipating in the bottom slag. The gaseous trace elements concentrations in flue gas are extremely low. Although the maximum value among them is less than 0.7μg/Nm3, As, Pb, Cr concentrations are much higher than the air quality requirements issued by the Ministry of Environmental Protection of China. Sufficient attention should be paid to the flue gas trace elements emission in coal-fired power plant. The concentrations of particulate trace elements in flue gas have very high value and large changes. With the efficient capture of fly ash, it can reduce particulate trace elements emissions in flue gas to a great extent. © 2017 Chin. Soc. for Elec. Eng.

引用

页码：193 / 199

页数：6

共 33 条

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