Effects of different factors on sulfur trioxide formations in a coal-fired circulating fluidized bed boiler

被引：23
|
作者：
Xiang, Baixiang [1 ]
Shen, Wenfeng [1 ]
Zhang, Man [1 ]
Yang, Hairui [1 ]
Lu, Junfu [1 ]
机构：
[1] Tsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2017年 / 172卷
关键词：
Circulating fluidized bed boiler; Sulfur trioxide; Homogeneous oxidation; Heterogeneous reaction; Kinetic mechanism; ACID DEW-POINT; SO3; MEASUREMENT; HIGH-PRESSURE; OXIDATION; REMOVAL; SYSTEM; ASH; AIR;
D O I：
10.1016/j.ces.2017.05.049
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Experimental and numerical studies were conducted to determine the effects of different factors on homogeneous and heterogeneous formations of sulfur trioxide (SO3) in a coal-fired circulating fluidized bed (CFB) boiler. In the experiments, homogeneous and heterogeneous formations of SO3 under coal-fired CFB combustion conditions were measured using controlled condensation and S balance, respectively. Meanwhile, homogeneous SO3 formation under coal-fired CFB combustion conditions was numerically calculated using an improved SO2/O-2/H2O/CO2/CO/NO kinetic mechanism. Measurement results showed that the effect of fly ash on SO3 concentration was slightly stronger than that of circulating ash. Both experimental and numerical results showed that SO3 concentration was apparently affected by SO2, O-2, and H2O concentrations and temperature but barely affected by CO2 concentration. (C) 2017 Published by Elsevier Ltd.
引用
收藏
页码：262 / 277
页数：16
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