华电技术 ›› 2018, Vol. 40 ›› Issue (4): 67-69.

• 节能与环保 • 上一篇    下一篇

300MW燃煤机组SCR烟气脱硝喷氨自动控制策略优化

  

  1. 华电能源股份有限公司牡丹江第二发电厂,黑龙江牡丹江〓157015
  • 出版日期:2018-04-25 发布日期:2018-06-21

The optimization of automatic control strategy of 300MW coalfired units SCR flue gas denitrification and ammonia injection

  1. Huadian Energy Company Limited, Mudanjiang Second Power Plant,Mudanjiang  157015, China
  • Online:2018-04-25 Published:2018-06-21

摘要:

简要介绍了影响火电燃煤机组烟气脱硝系统NOx参数稳定性的主要原因和选择性催化还原法方式(SCR)脱硝喷氨自动调节控制策略,并对脱硝系统喷氨流量的自动控制方法进行论述,提出以固定出口NOx串级控制方法代替单回路脱硝效率的优化控制方式,阐述了自动调节系统在调试和投运中遇到的问题及解决方法和投运后的效果。解决了脱硝出口NOx参数因惯性大而难于控制的问题,满足了SCR脱硝自动化控制要求,具有一定的参考性。

关键词:

Abstract:

It briefly introduces the key factors affecting the stability of NOx parameters of thermal power unit coalfired flue gas denitrification systemautomatic adjustment control strategy with selective catalytic reduction (SCR) denitrification ammonia injection. It discusses the automatic control method of ammonia injection flow and puts forward an optimized control method, by which fixed NOx outlets are cascade controlled, to replace the single loop denitrification. It explains the problems, solutions and the effect of the automatic control system in the debugging and operation process. It solves the difficulty in controlling NOx parameter at denitrification outlets due to the inertia and meets the requirement of SCR denitrification automatic control, which is of certain reference.

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