Mercury transformation across particulate control devices in six power plants of China: The co-effect of chlorine and ash composition

被引：80

作者：

Chen Lei

Duan Yufeng

Zhuo Yuqun ^{[1
]}

Yang Liguo

Zhang Liang

Yang Xianghua

Yao Qiang

Jiang Yiman

Xu Xuchang

机构：

[1] Tsing Hua Univ, Key Lab Thermal Sci & Power Engn, Minist Educ, Dept Thermal Engn, Beijing 100084, Peoples R China

[2] Southeast Univ, Power Engn Dept, Nanjing, Jiangsu, Peoples R China

来源：

FUEL | 2007年 / 86卷 / 04期

关键词：

speciation; coal combustion; base acid ratio;

D O I：

10.1016/j.fuel.2006.07.030

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper presents the results of field measurements on mercury speciation in six power plants of China by applying the Ontario hydro method. During the tests, flue gas was sampled simultaneously before and after particulate control devices (electrostatic precipitator and fabric filter baghouse) along with the pulverized coal, bottom ash and fly ash sampling. The amount of oxidized mercury in gas phase before and after ESP/FF suggests that mercury oxidation after combustion is a kinetically controlled process. The comparison of mercury speciation in different power plant indicates a clear relationship with coal type, especially the chlorine concentration and the basic ash compositions in coal. Both of the factors are analyzed quantitatively in this study. A new parameter C (ratio of chlorine in coal to base/acid ratio) has been introduced to evaluate the co-effect of the two factors above on mercury speciatiOD. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：603 / 610

页数：8

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