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

作     者：Kai Zhang Fangming Xue Zhiqiang Wang Xingxing Cheng Kai Zhang;Fangming Xue;Zhiqiang Wang;Xingxing Cheng

作者机构：School of Energy and Power EngineeringShandong UniversityJinan 250061China Huadian Electric Power Research Institute Co.Ltd.Hangzhou 310030China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第8期

页      面：202-210页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：the Key Research and Development Plan of Shandong Province (2019GSF109004) Natural Science Foundation of Shandong Province (ZR2020ME190) for funding and supporting this work 

主　　题：Air preheater Ammonium bisulfate ABS formation temperature Reaction kinetics 

摘      要：Ammonium bisulfate(ABS)is a viscous compound produced by the escape NH_(3) in the NO reduction process and SO_(3) in the flue gas at a certain temperature,which can cause the ash corrosion of the air preheater in coal-fired power ***,it is essential to study the formation temperature of ABS to prevent the deposition of ABS in air *** this paper,the SO_(3) reaction kinetic model is used to analyze the SO_(3) 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_(3) 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_(3) concentration and NH_(3) concentration in the previous calculation equation of ABS formation *** the reliability of the model is verified by the actual data of the power *** the influence of S content in coal,NH_(3)/NO_(x) molar ratio,different NO_(x) concentrations at SCR inlet,and NO removal efficiency on the formation temperature of ABS are analyzed.