Research on prediction model of formation temperature of ammonium bisulfate in air preheater of coal-fired power plant

Kai Zhang; Fangming Xue; Zhiqiang Wang; Xingxing Cheng

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Research on prediction model of formation temperature of ammonium bisulfate in air preheater of coal-fired power plant

Updated：2026-01-06

- Research on prediction model of formation temperature of ammonium bisulfate in air preheater of coal-fired power plant
- Chinese Journal of Chemical Engineering Vol. 48, Issue 8, Pages: 202-210(2022)
- Affiliations：
  
  1. School of Energy and Power Engineering, Shandong University,Jinan,China,250061
  2. Huadian Electric Power Research Institute Co., Ltd.,Hangzhou,China,310030
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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Kai Zhang, Fangming Xue, Zhiqiang Wang, Xingxing Cheng. Research on prediction model of formation temperature of ammonium bisulfate in air preheater of coal-fired power plant[J]. Chinese Journal of Chemical Engineering, 2022, 48(8): 202-210.
DOI：

Kai Zhang, Fangming Xue, Zhiqiang Wang, Xingxing Cheng. Research on prediction model of formation temperature of ammonium bisulfate in air preheater of coal-fired power plant[J]. Chinese Journal of Chemical Engineering, 2022, 48(8): 202-210. DOI：

摘要

Abstract

Ammonium bisulfate (ABS) is a viscous compound produced by the escape NH

in the NO reduction process and SO

in the flue gas at a certain temperature

which can cause the ash corrosion of the air preheater in coal-fired power plants. Therefore

it is essential to study the formation temperature of ABS to prevent the deposition of ABS in air preheaters. In this paper

the SO

reaction kinetic model is used to analyze the SO

generation process from coal combustion to the selective catalytic reduction (SCR) exit stage

and the kinetic model of NO reduction is used to analyze the NH

escape process. A prediction model for calculating the ABS formation temperature based on the S content in coal and NO reduction parameters of the SCR is proposed

solving the difficulty of measuring SO

concentration and NH

concentration in the previous calculation equation of ABS formation temperature. And the reliability of the model is verified by the actual data of the power plant. Then the influence of S content in coal

/ NO

molar ratio

different NO

concentrations at SCR inlet

and NO removal efficiency on the formation temperature of ABS are analyzed.

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