Characteristics of hydrogen sulfide formation in pulverized coal combustion

被引：45
作者：
Shirai, Hiromi [1 ]
Ikeda, Michitaka [1 ]
Aramaki, Hiroshi [2 ]
机构：
[1] Cent Res Inst Elect Power Ind, Yokosuka, Kanagawa 2400196, Japan
[2] IHI Corp, Isogo Ku, Yokohama, Kanagawa 2358501, Japan
来源：
FUEL | 2013年 / 114卷
关键词：
Hydrogen sulfide; Coal; Combustion; Fuel ratio; Sulfur content;
D O I：
10.1016/j.fuel.2012.03.028
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：
Low excess air combustion and two-stage combustion are currently being attempted as a means of reducing NOx emission from the boiler in pulverized coal-fired power plants. However, a strong reducing atmosphere is formed in the region between burners and air ports in the case of two-stage combustion. This atmosphere promotes the formation of hydrogen sulfide (H2S), which causes sulfidation corrosion at the boiler wall. The control of H2S formation and the prevention of corrosion are important in power plants. In this study, the characteristics of H2S formation in two-stage combustion were investigated using a test furnace for pulverized coal combustion. H2S was formed in the case of H-2 coexistence. The H2S concentration was affected by the fuel ratio and the sulfur content in coal. The H2S concentration is very low below a H-2 concentration of about 2%, above which the H2S concentration has a strong correlation with that of H-2. Furthermore, it was found that after the release of sulfur has finished, H2S and SO2 reach equilibrium concentrations in accordance with the equation SO2 + 3H(2) = H2S + 2H(2)O. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：114 / 119
页数：6
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