CaO颗粒烟气脱硫反应最佳反应温度的实验研究  

Experimental Investigation of the Optimum Reaction Temperature of Flue Gas Desulfurization Reaction Involving CaO Particles

作　　者：王世昌[1] 徐旭常[1] 姚强[1] 

机构地区：[1]清华大学热能动力工程与热科学重点实验室,北京100084

出　　处：《热能动力工程》2004年第5期454-457,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究发展规划基金资助项目(G19990222)

摘　　要：CaO颗粒的烟气脱硫反应受到烟气成份、温度和CaO颗粒自身特性的综合影响。通过实验研究和对前人工作的总结,证明了CaO颗粒在烟气脱硫循环流化床中的最佳反应温度为800℃。在此温度下,基本上避免烟气中NO和CO2等成份对脱硫反应的竞争反应;基本上回避了CaO等晶体的再结晶过程引起的脱硫反应速率的降低;使脱硫反应产物的主要成份变成CaSO4。CaSO4的热解温度比较高,脱硫产物的稳定性较好,不会对大气造成二次污染。The desulfurization reaction of flue gases with CaO is subject to a comprehensive influence of the following factors: flue gas composition, reaction temperature and CaO particle inherent characteristics. Through an experimental study and on the basis of summing up the past experience of predecessors it has been proven that the optimum reaction temperature of CaO particles in the circulating fluidized bed of flue gas desulfurization is 800°C. At this temperature it is possible to basically avoid the competitive reaction of such compounds in flue gases as NO, CO2, etc with respect to a desulfurization reaction and basically do away with the lowering of desulfurization reaction rate caused by the recrystallization process of CaO crystals. It is also possible to transform the main constituents of the desulfurization reaction products into CaSO4. The pyrolysis temperature of the latter is relatively high and the stability of the desulfurization products relatively good, thus eliminating the possibility of secondary pollution.

关 键 词：烟气脱硫 CAO颗粒 最佳温度 

分 类 号：X77[环境科学与工程—环境工程]