摘要
为确定湿法烟气脱硫石灰石的活性,根据膜理论,建立了石灰石溶解模型.并通过定pH值滴定法考察了pH值、温度、粒径分布、石膏、飞灰、Al3+、F-等因素对石灰石溶解过程的影响,试验数据同模型计算结果吻合较好.较低的pH值、较高的反应温度和较小的石灰石粒径有利于石灰石的溶解;石膏、飞灰、Al3+和F-对石灰石的溶解有轻微的抑制作用;Al3+与F-形成的络合物则会严重抑制石灰石的溶解.
To determine the reactivity of limestone used in WFGD（wet flue gas desulfurization） system, the dissolution model of limestone was built up based on film theory. The impact of pH value, temperature, particle size distribution, gypsum, fly ash, Al^3 ＋ and F^- on the dissolution of limestone was investigated by pH-stat method. Model predictions were in good agreement with experimental data. It seems that lower pH value, higher reaction temperature and smaller particle size are favorable to limestone dissolution. Gypsum , fly ash ,Al^3＋ or F^- has a light inhibition effect on limestone dissolution and the aluminum/fluoride complexes inhibit the dissolution of limestone seriously.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2007年第6期485-490,共6页
Journal of Combustion Science and Technology
基金
国家"十一五"科技支撑计划资助项目(2006BAA01B04)
教育部"新世纪"优秀人才支持计划资助项目(NCET-06-0513)
关键词
石灰石
活性
膜理论
溶解
limestone
reactivity
film theory
dissolution
作者简介
郭瑞堂（1978-），男，博士，grta@zju．edu．cn．
通讯作者：高翔，xgao@zju．edu．cn．
