华电技术 ›› 2019, Vol. 41 ›› Issue (2): 55-59.

• 节能与环保 • 上一篇    下一篇

燃煤电厂SCR脱硝系统氨逃逸率控制技术研究

  

  1. 1.湖南华电常德发电有限公司,湖南常德〓415001;2.中国华电集团科学技术研究总院有限公司,北京〓100070
  • 出版日期:2019-02-25 发布日期:2019-03-13

Study on ammonia escape rate control technology of SCR denitrification system in coalfired power plant

  1. 1.Hunan Huadian Changde Power Station Company Limited, Changde 415001, China; 2.China Huadian Science and Technology Institute Company Limited, Beijing 100070, China
  • Online:2019-02-25 Published:2019-03-13

摘要:

基于燃煤电厂选择性催化还原(SCR)脱硝原理,揭示氨逃逸的原因和对机组运行的危害。分析认为,影响SCR脱硝系统氨逃逸率的因素包括脱硝催化剂性能、烟气流场均匀性、锅炉运行方式、喷氨控制逻辑、仪器仪表及测量方式等。针对SCR系统氨逃逸率的影响因素,结合电厂机组实际运行情况,提出降低氨逃逸率的控制策略,可为国内燃煤电厂超低排放改造及SCR系统性能优化提供参考。

关键词:

Abstract:

Based on the reaction principle of SCR denitrification system, causes of ammonia escape and hazards to coalfired power plants are revealed. Factors affecting the ammonia escape rate of the denitrification system include denitrification catalyst performances, flue field uniformity, boiler operation modes, ammonia injection logic system, measurement gauges and methods, etc. According to these influencing factors and units operational status, control strategies for reducing ammonia escape rate are proposed. It provides guidance and reference for ultralow emission modification and performance optimization of SCR denitrification system in domestic coalfired power plants.

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