华电技术 ›› 2020, Vol. 42 ›› Issue (1): 8-14.

• 专题综述 • 上一篇    下一篇

失活脱硝催化剂处理技术进展

  

  1. 1.华北电力大学能源动力与机械工程学院,北京〓102206;2.国网四川省电力公司检修部,成都〓610041;3.徐州杰能设备有限公司,江苏徐州〓221008;4.大唐环境产业集团股份有限公司机械输送事业部,北京〓100097)
  • 出版日期:2020-01-25 发布日期:2020-03-20

Development of processing technology for deactivated SCR denitration catalyst

  1. 1.School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206,China; 2.Overhaul Departments, Sichuan Electric Power Company of State Grid Corporation, Chengdu 610041,China; 3.Xuzhou Jieneng Power Equipment Company Limited, Xuzhou 221008, China; 4.Mechanical Conveying Department, Datang Environmental Industry Group Company  Limited, Beijing 100097,China)
  • Online:2020-01-25 Published:2020-03-20

摘要:

为控制燃煤锅炉烟气中氮氧化物的排放控制,选择性催化还原(SCR)脱硝技术被大量推广应用,该技术的核心在于SCR脱硝催化剂的性能。对于活性降低但满足再生条件的SCR脱硝催化剂可以通过再生处理后进行循环利用。对由于不同原因失活的催化剂,可采用不同的或复合再生技术。SCR脱硝催化剂作为一种耗材,达到使用寿命后将最终变为危险固体废弃物,需对废弃SCR脱硝催化剂中金属的回收和无害化处理进行研究。通过研究,分析了失活SCR脱硝催化剂的再生及无害化处理工艺技术,提出了未来的发展思路和方向。

关键词: 脱硝催化剂, 选择性催化还原, 失活, 再生, 无害化处理, 金属回收

Abstract: To control the large amount of nitrogen oxides in the flue gas exhausted by coalfired boilers, selective catalytic reduction (SCR) denitration technology has been widely applied. The key of the technology is the performance of SCR denitration catalyst. SCR denitration catalyst with low activity but in favorable regeneration conditions can be recycled by regeneration treatment. Different or integrated regeneration techniques can be used on catalysts deactivated for different reasons.With the increase of regeneration times, SCR denitration  catalyst as a consumable material will eventually become hazardous solid waste. The deactivated SCR denitration catalyst harmless treatment and recycling of metal elements are studied, and correspondent treatment techniques are put forward, which provides concepts and directions for future development.

Key words: denitration catalyst, SCR, deactivated, regeneration, harmless treatment, recycling of metal elements