中国电力 ›› 2017, Vol. 50 ›› Issue (8): 163-167.DOI: 10.11930/j.issn.1004-9649.2017.08.163.05

• 节能与环保 • 上一篇    下一篇

SCR催化剂活性评估对NOx超低排放影响

李帅英1, 武宝会1, 姚皓1, 牛国平1, 王晓冰1, 黄钢英1, 张立德2, 路晓峰1, 刘毅1   

  1. 1. 西安热工研究院有限公司,陕西 西安 710054;
    2. 皖能铜陵发电有限公司,安徽 铜陵 244012
  • 收稿日期:2016-11-02 出版日期:2017-08-25 发布日期:2017-08-25
  • 作者简介:作者简介:李帅英(1985—),男,陕西岐山人,工程师,从事火电厂污染物治理研究及实施。E-mail:tprilsy@163.com

Effect of SCR Catalyst Activity Evaluation on Ultra Low Emission of NOx

LI Shuaiying1, WU Baohui1, YAO Hao1, NIU Guoping1, WANG Xiaobing1, HUANG Gangying1, ZHANG Lide2, LU Xiaofeng1, LIU Yi1   

  1. 1. Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710054, China;
    2. Wenergy Tonglin Power Generation Co., Ltd., Tongling 244012, China
  • Received:2016-11-02 Online:2017-08-25 Published:2017-08-25

摘要: SCR脱硝为NOx实现超低排放的关键技术,其关键性材料为催化剂。受实际运行工况及煤质等因素影响,催化剂活性的衰减规律会偏离理论曲线。通过数学模型对催化剂化学寿命进行了研究,结合具体案例,对催化剂层间效率及方案选择进行了分析,结果表明:超低排放改造中,催化剂活性评估对催化剂方案选择至关重要,影响设备稳定运行及投资成本。

关键词: SCR, 超低排放, 催化剂, 活性评估, 氨氮摩尔比, 化学寿命

Abstract: The catalyst is the key material in SCR denitrification technology, which plays the indispensable role to realize NOx ultra-low emission. However, depending on the practical operation conditions and the coal quality, the attenuation law of the catalyst activity will deviate from the theoretical curve. In this paper, the chemical lifetime of the catalyst is predicted by applying a mathematical model. In combination with the actual cases, the efficiency of catalyst layers and the selection of the catalyst are studied. The results show that in the ultra-low emission modifications, the catalyst activity evaluation is very critical to the selection of the catalyst. It may affect the stable operation of the equipment and the cost of the investment.

Key words: SCR, ultra-low emission, catalyst, activity evaluation, molar ratio of ammonia to nitrogen, chemical lifetime

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