电站锅炉SCR脱硝旁路烟道改造数值模拟及应用  

Power plant boiler SCR denitration bypass flue numerical simulation and application

作　　者：王敦敦 刘峰 陈珣[1] 吕当振[1] 杨益[1] 

机构地区：[1]国网湖南省电力公司电力科学研究院,长沙湖南410007 [2]长安益阳发电有限公司,益阳湖南413000

出　　处：《湖南电力》2016年第5期51-53,共3页Hunan Electric Power

摘　　要：某电厂在机组低负荷运行时,SCR脱硝装置入口烟温低于脱硝反应最低温度,导致SCR无法正常运行。采取了在锅炉转向室后抽出高温烟气,与低温烟气进行混合,提高SCR入口烟气温度的技术改造措施。通过数值模拟及试验,研究了旁路烟道布置方式对混合后烟气温度分布的影响以及改造前后锅炉效率、烟温分布变化的情况。A power plant SCR entrance gas temperature was lower than the safe reaction temperature in low load condition , which led to the abnormal operation of the SCR . Through technical renovation , high temperature flue gas was removed from theboiler steering room , which mixed with low temperature flue gas to increase the SCR flue gas temperature of entrance . This paper studies SCR the bypass flue arrangement influence on the distribution of mixed flue gas temperature through numerical simulation . The boiler efficiency and flue gas temperature distribution changes are analyzed through the tests .

关 键 词：SCR脱硝 旁路烟道 数值模拟 烟气温度 

分 类 号：TM621.2[电气工程—电力系统及自动化]