中国电力 ›› 2016, Vol. 49 ›› Issue (6): 161-165.DOI: 10.11930/j.issn.1004-9649.2016.06.161.05

• 节能与环保 • 上一篇    下一篇

火电厂SCR脱硝系统氨管道污堵治理及优化控制

贺栋红   

  1. 深能合和电力河源有限公司,广东 河源 517025
  • 收稿日期:2015-11-17 出版日期:2016-06-16 发布日期:2016-06-16
  • 作者简介:贺栋红(1981-),男,陕西延安人,工程师,从事汽轮机本体检修、水工、化学专业等设备维护与检修技术管理工作。E-mail: likewolf@163.com

Treatment and Control on Pipeline Blockage in SCR Denitrification System

HE Donghong   

  1. Shenzhen Energy HOPEWELL Power Heyuan Co., Ltd., Heyuan 517025, China
  • Received:2015-11-17 Online:2016-06-16 Published:2016-06-16

摘要: 火电厂选择性催化还原(SCR)烟气脱硝氨系统出现故障,将影响到整个脱硝系统的运行安全。在理论分析的基础上,根据脱硝系统设备维护过程中氨系统污堵治理经历,总结出有针对性的治理措施及控制策略,主要包括:从源头控制液氨品质,在适当位置增加滤网,避免金属腐蚀,临时吹扫蒸发槽,喷氨流量计增加旁路,蒸发槽供氨管道、阀门保温与加热,加强定期检修和维护,完善调节阀控制逻辑等。实践表明,所采取的措施行之有效,避免了问题的再次发生。

关键词: 燃煤电站, SCR脱硝, 氨系统, 污堵

Abstract: The malfunction occurrences in ammonia systemendangers the safe operation of the whole SCR denitrification system in thermal power plants. Based on the theoretical analysis and the denitrification equipment maintenance practice, a few approaches and controlling tactics are proposed, including controlling the ammonia quality fundamentally, setting filters on correct places, preventing metals from corrosion, clearing the steam-heater momentarily, setting by-pass at the flow meter, covering and equipping the feed pipes and the valves with thermal insulation and ammonia heater, enhancing timely repairment and maintenance, and improving the control valve logics. The practical operations show that the proposed measures are effective in avoiding the problems to happen.

Key words: coal-fired power plant, SCR denitrification, ammonia system, blockage

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