火电厂SCR烟气脱硝装置的模拟优化  

Simulation and optimization for flue gas SCR reactor of thermal power units

作　　者：余廷芳[1] 李俊[1] 曾过房 李海山[3] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]江西中电投新昌发电有限公司,江西南昌330117 [3]江西省电力科学研究院,江西南昌330013

出　　处：《南昌大学学报（工科版）》2014年第2期113-117,132,共6页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(61262048;51167005);江西省电力公司科技基金资助项目(201150618)

摘　　要：火电厂选择性催化还原法(SCR)反应器内的气流分布及还原剂的浓度分布直接影响其脱硝效果,以某660 MW火电机组SCR装置为研究对象,采用计算流体动力学软件STAR-CCM+对其进行一体化的模型建立、网格划分和模拟计算等工作,为了验证模拟结果,搭建了一个1∶12的物理模型进行冷态模拟实验,结果表明数值模拟结果与冷态实验结果吻合较好。针对原模型设计方案存在的问题,通过调整烟道内部导流装置,达到SCR系统烟气气流速度场、氨气浓度场均匀性分布的要求,得出的优化结果结论可以为类似SCR装置提供参考。Distribution of the air flow and ammonia concentration in the selective catalytic reduction （SCR） directly affects the denitrification effects in power plant units, taking a 660 MW thermal power unit SCR device for the study, using computational fluid dynamics software STAR - CCM ＋ for model building, division of grid and numerical simulation. In order to verify the simulation results, a physical model of 1 ： 12 was set up for cold simulation test, the results showed that the quantitative value simulation and cold lining test was matched well. According to the existing problem of the original model design, by adjusting the flue guide device, achieve SCR system of flue gas flow velocity field, the distribution of ammonia concentration field uniformity requirements, optimization results conclusion can provide reference for the similar SCR device.

关 键 词：SCR系统 数值模拟 流速分布 氨浓度场 冷态模拟 

分 类 号：X701.7[环境科学与工程—环境工程]