添加钢渣的碱式碳酸镁脱硫剂脱硫性能的研究  

Research on Desulfurization Performance of Basic Magnesium Carbonate Desulfurization Agent with Steel Slag

作　　者：赖立践 李瑛[1] 陈捷[1] 张恒[1] 颜小禹 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《工业加热》2016年第4期29-33,共5页Industrial Heating

基　　金：云南省应用基础研究面上项目(KKSA200804027)

摘　　要：脱硫剂的选用是影响燃煤锅炉烟气脱硫效率的重要影响因素之一。实验采用了实验室规模的鼓泡反应装置模拟烟气湿法脱硫过程,分别以碳酸钙、氧化镁、碱式碳酸镁以及添加钢渣的碱式碳酸镁作为脱硫剂进行了烟气脱硫实验,研究反应温度、鼓泡深度以及搅拌速度对脱硫剂脱硫性能的影响。结果表明,在模拟的烟气湿法脱硫反应过程中,几种脱硫剂的脱硫效率随着鼓泡深度与搅拌速度的增加而显著提高,反应温度对脱硫剂脱硫效率的影响并不明显。结合实验现象进行推断,SO2在气液两相界面的传质扩散和其水解产物在液相的扩散直接影响镁基脱硫剂的脱硫过程。The selection of desulfurization agent is one of the important factors that affect the efficiency of flue gas desulfurization in coal fired boilers. The experiment of wet flue gas desulfurization process is carried out in laboratory scale bubble reactor by using calcium carbonate, magnesium oxide, magnesium carbonate and compound desulfurization agent of magnesium hydroxide carbonate/steel slag.The effect of reaction temperature, bubbling in depth and stirring speed on some desulfurization sorbent performance is studied. The results showed that the desulfurization efficiency of reaction process is significantly increased with the increasing of bubbling in depth and stirring speed, and the effect of reaction temperature on the desulfurization efficiency of desulfurization agent is not to be noticeable. Therefore, it is known by analysis experimental results that the desulfurization process of magnesium-based desulfurization agent is affected directly by mass transfer diffusion of SO_2 in the gas-liquid two interface and its hydrolysis products in the liquid-phase diffusion.

关 键 词：镁基脱硫剂 钢渣/碱式碳酸镁脱硫剂 湿法烟气脱硫 脱硫性能 鼓泡反应器 

分 类 号：X511[环境科学与工程—环境工程]