石灰石脱硫的加压热重分析试验  

Thermogravimetric Experiments on Sulphur Absorption of Limestone under Pressurized Condition

作　　者：刘前鑫[1] 刘柏辉[1] 

机构地区：[1]东南大学热能研究所

出　　处：《东南大学学报（自然科学版）》1997年第2期1-7,共7页Journal of Southeast University：Natural Science Edition

摘　　要：对徐州３种石灰石和南京一种白云石进行了脱硫的加压热重试验．分析了石灰石脱硫反应的机理，当ＣＯ２分压低于ＣａＣＯ３平衡分解压力时，ＣａＣＯ３将发生分解，此时的硫化反应发生在ＣａＯ和ＳＯ２之间；当ＣＯ２分压高于ＣａＣＯ３平衡分解压力时，Ｃａ－ＣＯ３将不发生分解，直接与ＳＯ２发生硫化反应．得到了压力、石灰石品种、温度和ＳＯ２浓度等对钙利用率的影响规律。The sulphur absorption capacities of three limestones from Xuzhou City and one dolomite from Nanjing City were determined by means of a pressurized thermogravimetric apparatus. The mechanism of sulfation reaction of limestone are analyzed. CaCO 3 will calcine at CO 2 partial pressure below the thermodynamic equilibrium pressure, then, CaO reacts with SO 2. When CO 2 partial pressure is higher than the thermodynamic equilibrium pressure, CaCO 3 does not calcine, it reacts with SO 2 directly. The effects of pressure, limestone kind, temperature and concentration of SO 2 on the sorbent conversion rate are investigated. Besides, the values of kinetics paramters are calculated.

关 键 词：石灰石 脱硫 热重分析法 流化床 燃烧 二氧化硫 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程] X511[环境科学与工程—环境工程]