烟气脱硫过程中添加剂对石灰石的促溶作用-中国科技论文在线.PDF

________________________________________________________________________http:\\ 中国环境科学 2002,22(4)：305~308 China Environmental Science 烟气脱硫过程中添加剂对石灰石的促溶作用 1 2* 2 孙文寿 ,吴忠标 ,谭天恩 (1.青岛大学环境科学与工程系, 山东 青岛 266071 ；2.浙江大学环境工程系,浙江 杭 州 310027) 摘要：以双搅拌釜为实验设备,研究了烟气脱硫过程中硫酸钠、硫酸镁和腐殖酸钠对石灰石的促溶作用.结果表明,分别采用3 种不同添加 剂时,pH 值等随脱硫反应时间的变化规律类似;与非强化石灰石脱硫过程对比,在相同pH 值下,3 种添加剂均使石灰石颗粒体积占初始体积 的分率r 减小,即均能促进石灰石的溶解,改善浆液的传质性能.通过理论分析,导出了r 与浆液pH 值之间的关系式,该方程能很好地关联 p p 双搅拌釜实验数据. 关键词：烟气脱硫；石灰石；添加剂；溶解；搅拌釜；二氧化硫 中图分类号：X51 文献标识码：A 文章编号：1000-6923(2002)04-0305-04 1 Promoting effects of additives on limestone dissolution in flue gas desulfurization process. SUN Wen-shou , WU 2 2 Zhong-biao , TAN Tian-en (1.Department of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China ；2.Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China). China Environmental Science . 2002,22(4)：305~308 Abstract：The promoting effects of sodium sulfate, magnesium sulfate and sodium humate on limestone dissolution in flue gas desulfurization(FGD) process were studied in a stirred tank. Results demonstrated that changes of pH value etc. with desulfurization time had similar tendency when three different additives were used individually. Compared with the limestone FGD process without additives at same pH value, the three additives could all reduce the values of r , the ratio p of limestone particle volume to its initial one, that is, they could all promote li