燃煤电厂SCR脱硝催化剂磨损诊断及对策研究

doi:10.11930/j.issn.1004-9649.201610116

中国电力 ›› 2018, Vol. 51 ›› Issue (1): 158-163.DOI: 10.11930/j.issn.1004-9649.201610116

燃煤电厂SCR脱硝催化剂磨损诊断及对策研究

雷嗣远¹, 孔凡海¹, 王乐乐¹, 杨晓宁¹, 杜昌飞²

1. 西安热工研究院有限公司苏州分公司, 江苏苏州 215153;
2. 淮沪电力有限公司田集第二发电厂, 安徽淮南 232098

收稿日期:2016-10-20 修回日期:2016-12-12 出版日期:2018-01-05 发布日期:2018-02-28
作者简介:雷嗣远(1984-),男,广西柳州人,硕士,工程师,从事燃煤电厂烟气脱硝催化剂及流场测试、模拟相关领域研究,E-mail:leisiyuan7@163.com。

Diagnosis and Countermeasures of SCR Denitration Catalyst Abrasion in Coal-fired Power Plants

LEI Siyuan¹, KONG Fanhai¹, WANG Lele¹, YANG Xiaoning¹, DU Changfei²

1. Suzhou TPRI Ener & Enviro Tech Co., Ltd., Suzhou 215153, China;
2. Huaihu Coal & Power Co., Ltd., Tianji Power Plant No. 2, Huainan 232098, China

Received:2016-10-20 Revised:2016-12-12 Online:2018-01-05 Published:2018-02-28

摘要/Abstract

摘要： 为解决燃煤电厂SCR烟气脱硝系统运行中日益突出的催化剂磨损问题，对催化剂磨损机理、成因及危害进行分析，总结出应对催化剂磨损的诊断思路和策略，并以某300 MW机组蜂窝式SCR催化剂磨损治理为例，介绍具体的解决方法及步骤。首先对催化剂层磨损分布规律进行测量统计，在确定催化剂单元体机械强度合格的同时，确认蒸汽吹灰器未对催化剂造成吹损；之后通过CFD数值模拟方法对催化剂单孔道和反应器流场进行研究，发现该机组催化剂磨损原因在于催化剂首层局部区域烟气流速不均、入射角偏斜，随即进行了流场优化设计。优化方案实施后，消除了烟气速度场高速区，矫正了入射角角度，有效减轻了催化剂的磨损。

关键词: 燃煤电厂, 烟气脱硝催化剂, 磨损机理, 反应器流场, 烟气流速, 烟气入射角

Abstract: In order to solve the increasingly prominent issue of gas denitration catalyst system abrasion in coal-fired power plants, the mechanism as well as the causes and the damages of the catalyst abrasion are analyzed. The diagnostic idea and strategies are also summarized. Then detailed solution procedures are introduced by taking the example of the catalyst abrasion treatment for a 300 MW unit. Firstly, the distribution statistics of the abrasion was compiled. While sufficient mechanical resistances of the catalyst elements was confirmed, the steam sootblower was verified to cause no blowing loss of catalyst. Secondly, CFD numerical simulation was employed to investigate the flow fields inside both the honeycomb pores and the reactor. The root cause of abrasion was revealed as the extraordinarily high velocity and deviation of injection angle of gas flow at some parts of the upper layer. Afterwards the flow field design was optimized. Since the implementation of optimized plan, the catalyst abrasion has been effectively improved by eliminating the parts with high velocity and adjusting the injection angle of gas flow. The diagnosis strategy to the catalyst abrasion in this investigation is of great significance to solve the practical problem of the power plants.

Key words: coal-fired power plants, SCR de-NO_x catalyst, abrasion mechanism, flow field, flue gas velocity, flue gas denitration

中图分类号:

X705
TM621.9

雷嗣远, 孔凡海, 王乐乐, 杨晓宁, 杜昌飞. 燃煤电厂SCR脱硝催化剂磨损诊断及对策研究[J]. 中国电力, 2018, 51(1): 158-163.

LEI Siyuan, KONG Fanhai, WANG Lele, YANG Xiaoning, DU Changfei. Diagnosis and Countermeasures of SCR Denitration Catalyst Abrasion in Coal-fired Power Plants[J]. Electric Power, 2018, 51(1): 158-163.

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https://www.electricpower.com.cn/CN/Y2018/V51/I1/158

参考文献

[1] 张强. 燃煤电站SCR烟气脱硝技术及工程应用[M]. 北京:化学工业出版社,2007.
[2] NAKAJIMA F, HAMADA I. The state-of-the-art technology of NO_x control[J]. Catalysis Today, 1996, 29(1-4):109-115.
[3] 陈进生. 火电厂烟气脱硝技术——选择性催化还原法[M]. 北京:中国电力出版社,2008:51-54.
[4] FORZATTI P. Present status and perspectives in de-NO_x SCR catalysis[J]. Applied Catalysis A:General, 2001, 222(1-2):221-236.
[5] 冯前伟,张杨,王丰吉,等. 现役燃煤机组SCR烟气脱硝装置运行现状分析[J]. 中国电力,2017,50(4):157-161. FENG Qianwei, ZHANG Yang, WANG Fengji. et al. Analysis on operating status of SCR facilities in active coal-fired units[J].Electric Power, 2017, 50(4):157-161.
[6] 鲁佳易,卢啸风,刘汉周,等. SCR法烟气脱硝催化剂及其应用特性的探讨[J]. 电站系统工程,2008,24(1):5-8. LU Jiayi, LU Xiaofeng, LIU Hanzhou, et al. The recent application of de-NO_x SCR catalysts[J]. Power System Engineering, 2008, 24(1):5-8.
[7] 孙艺心,韩强. SCR脱硝系统催化剂防磨措施的探讨[J]. 锅炉制造,2013(4):39-40. SUN Yixin, HAN Qiang. Discussion of SCR de-NO_x catalyst abrasion proof measures[J]. Boiler Manufacturing, 2013(4):39-40.
[8] 何文深,陈建军,郑佐东. SCR蜂窝式脱硝催化剂抗磨损性能研究[J]. 电力科技与环保,2011,27(5):10-12. HE Wenshen, CHEN Jianjun, ZHENG Zuodong. Study of abrasion performance of SCR honeycomb catalysts[J]. Electric Power Environmental Protection, 2011, 27(5):10-12.
[9] 李俊华,杨恂,常化振. 烟气催化脱硝关键技术研发及应用[M]. 北京:科学出版社,2015.
[10] 杨泽伦. SCR烟气脱硝工程设计原则和关键设计技术[J]. 中国电力,2015,48(4):27-31. YANG Zelun. Principles and key techniques for SCR De-NO_x engineering design[J]. Electric Power, 2015, 48(4):27-31.
[11] 肖雨亭,徐莉,贾曼,等. 蜂窝式脱硝催化剂在烟气中磨损行为的模拟研究[J]. 中国电力,2012,45,(12):96-98. XIAO Yuting, XU Li, JIA Man, et al. Research on abrasion simulation of de-NO_x honeycomb catalysts in flue gas[J]. Electric Power, 2012, 45(12):96-98.
[12] 李锋,於承志,张朋,等. 高尘烟气脱硝催化剂耐磨性能研究[J]. 热力发电,2010,39(12):73-75. LI Feng, YU Chengzhi, ZHANG Peng, et al. Study on abrasieveness of catalyst used for denitrification in flue gas with high dust content[J]. Thermal Power Generation, 2010, 39(12):73-75.
[13] 邓静杰,韦红旗,仲亚飞. 670 MW机组SCR脱硝催化剂磨损的研究分析[J]. 电站系统工程,2015,31(4):58-60. DENG Jingjie, WEI Hongqi, ZHONG Yafei. Analysis on abrasion of catalyst in SCR denitrification device of 670 MW power unit[J]. Power System Engineering, 2015, 31(4):58-60.
[14] WILHITE DAVID C. The use of computational fluid dynamics in selective reduction system ductwork design[C]//Proceedings of the ASME Fluids Engineering Division, New York, 1998:247-248.
[15] XU Yuanyuan, ZHANG Yan, LIU Fengna, et al. CFD analysis on the catalyst layer breakage failure of an SCR de-NO_x system for a 350 MW coal-fired power plant[J]. Computers & Chemical Engineering, 2014, 69(3):119-127.

燃煤电厂SCR脱硝催化剂磨损诊断及对策研究

Diagnosis and Countermeasures of SCR Denitration Catalyst Abrasion in Coal-fired Power Plants

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燃煤电厂SCR脱硝催化剂磨损诊断及对策研究

Diagnosis and Countermeasures of SCR Denitration Catalyst Abrasion in Coal-fired Power Plants

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