旁通式烟气循环流化床脱硫特性的数值模拟  

Numerical simulation of desulfurization characteristics in CFB flue gas with bypass

作　　者：唐强[1,2] 侯世锋[1] 张晓琴[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044 [2]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [3]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [4]重庆大学a.动力工程学院 [5]b.低品位能源利用技术及系统教育部重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2012年第10期104-108,共5页Journal of Chongqing University

基　　金：重庆市自然科学基金重点基金项目(CSTC,2009BA6067)

摘　　要：应用标准k-ε模型、DPM模型和物质输运与化学反应模型模拟了烟气循环流化床内的两相流动及脱硫反应,模拟结果和实验数据吻合较好。模拟研究了2种脱硫塔的脱硫效率和流动阻力,并进一步研究了入口SO2浓度对旁通式脱硫塔脱硫效率的影响。结果表明:旁通式脱硫塔的脱硫效率和阻力特性要优于无旁路脱硫塔;旁通式脱硫塔的脱硫效率随入口SO2浓度的增加而降低;脱硫塔内湿度增加时,脱硫效率增加。This paper uses the standard k-e model, DPM, Species Transport and Finite-Rate Chemistr model to simulate momentum, energy and composition equations of a new CFB desulfurization tower wit gas bypass. The numerical simulation results agree well with the experimental results. The characteristic of desulfurization and flow resistance of two desulfurization towers are analyzed by numerical simulation and the influence of SO2 concentration to desulfurization efficiency of bypassing desulfurization tower is als analyzed. The results show that both desulfurization and flow resistance characteristics of bypassin desulfurization tower are better than those of non-bypassing desulfurization tower. The desulfurizatio efficiency of bypassing desulfurization tower decreases with the increase of SO2 concentration, th desulfurization efficiency increases with the increase of the relative humidity of bypassing desulfurizatio tower.

关 键 词：循环流化床脱硫塔 脱硫效率 数值模拟 

分 类 号：TK09[动力工程及工程热物理]