大型燃煤电站锅炉脱硫塔脱硫效率的数值模拟  

Numerical Simulation on Desulfurization Efficiency of WFGD Tower in a Large Coal-fired Power Plant Boiler

作　　者：潘卫国[1] 郭瑞堂[1] 冷雪峰[1] 徐宏建[1] 张晓波[1] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090

出　　处：《动力工程学报》2011年第4期306-311,共6页Journal of Chinese Society of Power Engineering

基　　金：上海市科委科技攻关项目(09DZ1203903);上海市引进技术的吸收与创新计划;上海市地方高校能力建设项目(09230501300);上海市教委重点学科(G51304);上海市教委第三期本科教育高地建设项目

摘　　要：利用双膜理论建立了脱硫过程的理论模型,以国内某百万千瓦级火电机组烟气脱硫系统的脱硫塔为例进行了数值计算,分析了浆液pH值、入口SO2质量浓度、液气比、锅炉负荷、浆液液滴粒径、喷淋层投运方式及吸收塔塔径等参数对脱硫效率的影响,并与工程实际数据进行了比较.结果表明:数值计算结果与生产现场运行数据比较吻合;各喷淋层的脱硫能力不一样,第3喷淋层的脱硫能力最强,第2喷淋层和第1喷淋层的脱硫能力次之;脱硫效率随浆液pH值和液气比的增大而提高,随入口SO2质量浓度、锅炉负荷和浆液液滴粒径的增加而逐渐降低.A theoretical model for desulfurization process of wet flue gas desulfurization（WFGD） systems has been built up based on two-film theory,with which numerical calculations were made for the desulfurization tower of a domestic 1 000 MW class fossil power unit,and subsequently the influence of following factors on the desulfurization efficiency was analyzed,such as the pH value of slurry,inlet mass concentration of SO2,liquid-gas ratio,boiler load,droplet size of slurry,operation mode of spray levels as well as the size of absorption tower.Comparison results between simulation and actual operation show that the simulation results agree well with that of actual operation.All the spray levels have a different desulfurization capability： level 3 is the strongest,followed by level 2 and level 1.The desulfurization efficiency increases with rising pH value and liquid-gas ratio,but reduces with rising inlet mass concentration of SO2,boiler load and the droplet size.

关 键 词：湿法烟气脱硫 脱硫塔 脱硫效率 数值模拟 

分 类 号：X701.3[环境科学与工程—环境工程]