Effect of Atmosphere on HCI Releasement during MSWI Fly Ash Thermal Treatment

作     者：YANG Guiyun REN Qiangqiang ZHOU Li XU Jing LYU Qinggang YANG Guiyun;REN Qiangqiang;ZHOU Li;XU Jing;LYU Qinggang

作者机构：Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing100190China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Journal of Thermal Science》 (热科学学报(英文版))

年 卷 期：2023年第32卷第6期

页      面：2243-2255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] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(U1810127) the Youth Innovation Promotion Association,Chinese Academy of Science(Y201932) 

主　　题：municipal solid waste incineration fly ash thermal treatment HCl emission atmosphere 

摘      要：Municipal solid waste incineration(MSWI)fly ash constitutes a hazardous *** disposal has been verified to be prospective for stabilizing heavy metals and *** of contaminant HCl during MSWI fly ash thermal treatment leads to potential environmental *** behavior and transformation of chlorine are critical to the disposal strategy of MSWI fly *** this study,the pathway of HCl formation in MSWI fly ash thermal treatment under complex atmosphere was *** show that CaOHCl in fly ash was first decomposed to CaCl_(2),CaO and H_(2)O below 550°C,which provides H for HCl ***,CaCl_(2),NaCl or KCl were reacted with H_(2)O to release HCI,during which process H_(2)O and O2 promote HCl formation,CO inhibit HCl production since H_(2)O is consumed in water-gas *** initial temperature of HCl generation affected by the concentration of H_(2)O in the *** temperature up to 1250°C,almost all NaCl or KCl were volatilized,HCl mainly from the reaction of chlorine-containing minerals with H_(2)O,such as Ca_(19.2)Mg_(2.8)(Si_(0.75)Al_(0.75))8 O36Cl_(2),Ca4(SiO4)(SO4)Cl_(2)and Ca10(SiO4)3Cl_(2)in N_(2),CO and air atmosphere ***,in a reducing atmosphere,metals are more easily chlorinated by HCI,resulting in further consumption of *** order of atmosphere for reducing HCl emissions should be CON_(2)AirH_(2)O.