锅炉技术2023，Vol.54Issue(6)：14-19,6.
SCR进口烟道飞灰拦截与均匀布置技术应用研究
Research and Application of Interception and Uniform Distribution Technology of Fly Ash in SCR Inlet Flue Gas Duct
摘要
Abstract
The serious fouling and blocking problems of several rows at first layer catalysts near the front wall were investigated in this paper,which are common in the selective catalyt-ic reduction(SCR)de-NOx device of coal-fired boilers.Taking a 350 MW coal-fired unit as an example,CFD numerical simulation and field test were used to carry out diagnostic analysis,and the catalyst anti blocking modification was carried out using fly ash interception and uni-form layout.Studies have shown that bias flow of coarse ash leads to a significantly higher fly ash concentration in the area near the front wall upstream of the top catalyst,and the accu-mulation of coarse fly ash in this area aggravates the wear of the catalyst.After adopting the plan of intercepting large particles at the economizer outlet and evenly distributing fly ash in the ascending flue gas duct,the serious fouling and blocking problems at several rows of top layer catalysts has been solved effectively.关键词
脱硝/催化剂/积灰/粗灰拦截/飞灰均布Key words
denitration/catalyst/fouling/coarse ash interception/uniform distribu-tion of fly ash分类
资源环境引用本文复制引用
韦振祖,徐宝权,张华东,时俊,李杰,盛涛,李斌..SCR进口烟道飞灰拦截与均匀布置技术应用研究[J].锅炉技术,2023,54(6):14-19,6.基金项目
华能集团总部科技项目(HNKJ21-HF177) （HNKJ21-HF177）
