SO_3脱除技术实验研究

Experimental Research on SO_3 Removal

在自行设计和搭建的实验平台上,研究了SCR催化剂的SO2/SO3转化率与反应温度的关系.在SCR催化剂催化SO2生成SO3的基础上,研究了钙基、镁基对SO3的吸附作用,并对吸附前后的样品进行电子显微镜扫描,分析了钙基、镁基对SO3吸附作用的影响因素及脱除机理.结果表明:SO2/SO3转化率随着反应温度的升高而提高,温度达到300℃后,SO2/SO3转化率增长趋势变缓,且在反应温度范围内与温度呈现良好的线性关系;4种吸收剂吸附SO3的效果依次为:Mg(OH)2>Ca(OH)2>MgO>CaO.

The effect of temperature on SO2/SO3 conversion rate under the action of SCR catalyst was studied on a self-developed experimental setup,in which case,the absorption capability of Ca-based and Mgbased sorbents to SO3 was investigated,and simultaneously the samples were analyzed using scanning electron microscopy before and after adsorption experiment,so as to analyze the factors influencing the SO3 adsorption by Ca-based and Mg-based sorbents and the removal mechanism.Results show that the SO2/SO3 conversion rate increases with rising reaction temperature,and the increasing tendency slows down when the temperature gets up to 300℃.The conversion rate has a good linear relationship with the temperature in the reaction scope.The adsorption capability of the four sorbents tested to SO3 are ranked from high to low as follows:Mg(OH)2,Ca(OH)2,MgO and CaO.