喀什电厂SCR脱硝烟道流场优化  

Flow Field Optimization of SCR Denitration System in Power Plant

作　　者：江建平 孙强 姜肇中 齐佶 张志中 蒋文 陈琦 刘现伟 王丹秋 JIANG Jian-ping;SUN Qiang;JIANG Zhao-zhong;无(Huadian Electric Power Research Institute Co.,Ltd.;Xinjiang Huadian Kashgar Thermal Power Co.,Ltd.;Hangzhou Huadian Energy Engineering Co.,Ltd.;Nanjing Newatt Technology Co.,Ltd.)

机构地区：[1]华电电力科学研究院有限公司,浙江杭州310000 [2]新疆华电喀什热电有限责任公司 [3]杭州华电能源工程有限公司 [4]南京新瓦特智控科技有限公司

出　　处：《电站系统工程》2023年第6期60-63,共4页Power System Engineering

摘　　要：针对电厂目前选择性催化还原(SCR)脱硝系统存在的速度场不均的问题,通过数值模拟的方法对反应器内部流场进行模拟分析。选择在烟道第三拐角处添加导流板数量的方式对反应器内部的流场进行优化设计,并针对不同的工况对设计方案进行验证。模拟结果显示,通过导流板的优化设计,在锅炉各个不同的运行工况下,反应器内部烟气在喷氨格栅前的速度相对标准偏差在15%以下,在首层催化剂层入口处的速度相对标准偏差也达到15%以下,优化设计可以满足工程需要。Aiming at the problem of uneven velocity field in the selective catalytic reduction denitration system in power plant,the flow field inside the reactor was simulated and analyzed by numerical simulation method.The flow field inside the reactor was optimized by adding the number of diverters at the third corner of the flue,and the design scheme was verified according to different working conditions.The simulation results show that under different operating conditions of the boiler,the relative standard deviation of the velocity of the flue gas in the reactor before the ammonia injection grid is less than 15%,and the relative standard deviation of the velocity at the entrance of the first catalyst layer is also less than 15%.The optimized design can meet the engineering needs.

关 键 词：SCR 数值模拟 流场优化 速度标准偏差 

分 类 号：X701.3[环境科学与工程—环境工程]