中国电力 ›› 2016, Vol. 49 ›› Issue (7): 162-167.DOI: 10.11930/j.issn.1004-9649.2016.07.162.06

• 节能与环保 • 上一篇    下一篇

某660 MW超超临界机组脱硝催化剂不均匀磨损治理

王放放1, 李敏2, 许佩瑶1   

  1. 1. 华北电力大学 环境科学与工程学院,河北 保定 071003;
    2. 国网河南省电力公司电力科学研究院,河南 郑州 450052
  • 收稿日期:2015-12-29 出版日期:2016-07-20 发布日期:2016-07-28
  • 作者简介:王放放(1991—),男,陕西商洛人,研究生,从事火电厂烟气脱硝、脱硫研究。E-mail: 939882516@qq.com

The Denitrification Catalyst Abrasion Treatment of a 660-MW Ultra Supercritical Unit

WANG Fangfang1, LI Min2, XU Peiyao1   

  1. 1. North China Electric Power University, Baoding 071003, China;
    2. Henan Electric Power Research Institute, Zhengzhou 450052, China
  • Received:2015-12-29 Online:2016-07-20 Published:2016-07-28

摘要: 火电厂SCR脱硝催化剂不均匀磨损会降低催化剂的整体使用寿命。以某660 MW机组超超临界锅炉SCR装置为研究对象,利用数值模拟和现场测试方法,找出了催化剂不均匀磨损的原因;运用数值模拟方法对不同改造方案进行模拟计算,优选出SCR脱硝装置入口断面流场、颗粒浓度场分布均匀的改造方案并加以实施。改造后的测试结果表明,脱硝装置入口烟气流速和飞灰浓度均匀性得到提高,因而可使催化剂的不均匀磨损问题基本得到解决。

关键词: 燃煤电厂, 超超临界机组, 烟气脱硝, 催化剂磨损, 数值模拟, 粉煤灰成分, 优化设计

Abstract: The uneven wear of SCR catalyst may shorten the overall service life of the catalyst in thermal power plants. Taking the example of the SCR device of a 660-MW ultra supercritical unit in a power plant, the causes of uneven catalyst wear are figured out by means of numerical simulation and field tests. The numerical simulation method is also adopted to perform simulation calculation for different retrofit plans such that the optimal solution with even SCR device inlet sectional flow field and particle concentration distribution can be selected and then implemented. The testing result after retrofit shows that the evenness of both the inlet flue gas flow rate and the fly ash concentration are improved, which basically solves the problem of uneven catalyst abrasion.

Key words: coal-fired power plant, ultra supercritical unit, flue gas denitrification, abrasion of catalyst, numerical simulation, elements of coal, optimization design

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