中国电力 ›› 2015, Vol. 48 ›› Issue (4): 50-53.DOI: 10.11930.2015.4.50

• 火电厂烟气脱硝技术专栏 • 上一篇    下一篇

高含铝脱硝催化剂运行前后性能对比分析

晏敏1,陈进生2,宋小宁3,杜振1   

  1. 1. 华电电力科学研究院,浙江 杭州 310030;
    2. 中国科学院 城市环境研究所,福建 厦门 361021;
    3. 浙江省电力试验研究院,浙江 杭州 310014
  • 收稿日期:2015-01-12 出版日期:2015-04-25 发布日期:2015-12-03
  • 作者简介:晏敏(1982—),女,江西上高人,硕士,工程师,从事火电厂烟气脱硫脱硝方面的研究。E-mail: yanmin0606@163.com

omparative Analysis on the Performance of High-Content Aluminium De-NOx Catalysts before and after Operation

YAN Min1, CHEN Jinsheng2, SONG Xiaoning3, DU Zhen1   

  1. 1. China Huadian Electric Research Institute, Hangzhou 310030, China;
    2. Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
    3. Zhejiang Electric Power Test&Research Institute, Hangzhou 310014, China
  • Received:2015-01-12 Online:2015-04-25 Published:2015-12-03

摘要: 为了研究催化剂载体中加入过多Al2O3粉末对催化效果及催化剂本身可能产生的影响,以某电厂安装的高含铝脱硝催化剂为研究对象,对其新催化剂和运行8 000 h后催化剂的表观、工艺特性、主要化学成分、微观结构、晶体结构和扫描电镜图像进行了对比分析。研究结果表明,运行8 000 h后催化剂中的Al2O3与烟气中SO2和SO3反应生成Al2(SO4)3,可造成催化剂的扭曲变形断裂、微观比表面积的急剧下降和催化剂晶体粒子板结,从而导致脱硝效率较大程度的下降。电厂应避免将高含铝的催化剂装入脱硝反应器。

关键词: 火电厂, 烟气脱硝, 选择性催化还原, 催化剂, 高含铝催化剂, Al2O3

Abstract: In order to study the impact of excessive Al2O3 added to the catalyst carrier on the catalyst and its performance the appearance, technological characteristics, main chemical components, micro mechanisms, crystal structures and SEM between the fresh and 8 000-h-used high-content aluminum catalyst are compared and analyzed. The results show that after 8 000 hours of operation, the Al2O3 in the catalysts interacts with the SO2 and SO3 in the flue gas and turns to Al2(SO4)3 , which causes not only the catalysts to deform and break down, but also the micro specific surface area to fall off rapidly and the particles of the catalysts to sintering. Consequently, the denitration efficiency drops down sharply. Therefore, high-content aluminium de-NOx catalysts should be avoided being applied in the de-NOx reactors.

Key words: thermal power plant, flue gas de-NOx, selective catalytic reduction, catalyst, high-content aluminium catalyst, Al2O3

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