燃煤电厂数据湖下SCR脱硝催化剂性能评估  

Performance evaluation of SCR denitration catalyst under the data lake of coal-fired power plant

作　　者：黄奎 李盛冬 周锦晖 沈小俊 葛鑫 HUANG Kui;LI Shengdong;ZHOU Jinhui;SHEN Xiaojun;GE Xin(State Grid Environmental Protection Research Institute Co., Ltd.)

机构地区：[1]国电环境保护研究院有限公司

出　　处：《环境工程技术学报》2024年第6期1829-1836,共8页Journal of Environmental Engineering Technology

摘　　要：以某一燃煤电厂数据湖下SCR脱硝催化剂为实例,通过现场勘查、催化剂指标检测等途径,分析了催化剂的物理化学性质及脱硝性能的变化规律。结果表明:在一定的煤质和烟气条件下,在机组利用小时内,催化剂的机械强度指标不易受反应器内环境的影响,抗压强度检测值几乎不变,烟气中粉尘及其反应后的生成物有助于增强其抗耐磨性能,但随着利用小时数的再延长,催化剂会出现内壁裂纹、壁厚变薄、孔壁磨穿等结构性破损现象,不利于催化剂的安全稳定运行;TiO_(2)、V_(2)O_(5)、WO_(3)等主要化学成分以及微量元素(Na、K、Fe、As)、比表面积、脱硝率、SO_(2)/SO_(3)转化率均呈下降趋势,SiO_(2)、Al_(2)O_(3)、CaO等主要化学成分呈上升趋势,表明催化剂的理化性质和工艺指标均受反应器内环境的影响较大,导致各指标产生负效应,影响催化剂的整体性能。研究通过分析在一定烟气条件下SCR催化剂的化学指标和机械指标的衰减规律,为催化剂全过程管理提供理论参考。Taking the SCR denitrification catalyst under the data lake of a coal-fired power plant as an example,the change rules of the physicochemical properties and the catalyst denitrification performance were comprehensively analyzed by on-site investigation,catalyst indicator testing,etc.The results showed that under certain coal and flue gas conditions,the mechanical strength index of the catalyst was not easily affected by the environment in the reactor within the unit utilization time,and the compressive strength detection value remained almost unchanged.The dust in the flue gas and the reaction products helped enhance the catalyst's attrition resistance.However,with the extension of utilization time,the catalyst would experience structural damage such as inner wall cracks,thinning of wall thickness,and wear through of pore walls,which was not conducive to the safe and stable operation of the catalyst.Some major chemical components(TiO_(2),V_(2)O_(5),WO_(3)),trace elements(Na,K,Fe,As),specific surface area,denitrification efficiency,and SO_(2)/SO_(3) conversion rate all showed a downward trend,while some other major chemical components(SiO_(2),Al_(2)O_(3),CaO) showed an upward trend,which indicated that the physicochemical and process indicators of the catalyst were greatly affected by the internal environment of the reactor,resulting in negative effects on each indicator and affecting the overall performance of the catalyst.By analyzing the attenuation law or key factors of the chemical and mechanical indicators of SCR catalysts under flue gas conditions,the research can provide a theoretical reference for the entire process management of catalysts.

关 键 词：数据湖 机械指标 理化指标 工艺指标 性能评估 

分 类 号：X773[环境科学与工程—环境工程]