华电技术 ›› 2018, Vol. 40 ›› Issue (4): 59-62.

• 节能与环保 • 上一篇    下一篇

某300MW机组SCR脱硝装置氨喷射系统优化改造研究

  

  1. 1.厦门华夏国际电力发展有限公司,福建厦门〓361026;2.西安热工研究院有限公司苏州分公司,江苏苏州〓215153
  • 出版日期:2018-04-25 发布日期:2018-06-21

Study on optimization of SCR ammonia injection system of a 300MW unit

  1. 1.Xianmen Huaxia International Power Development Company Limited, Xiamen 361026,China; 2.TPRI Company Limited, Suzhou Branch, Suzhou 215153, China
  • Online:2018-04-25 Published:2018-06-21

摘要:

某300MW机组在超低排放运行中,长期存在局部喷氨喷嘴堵塞、反应器截面局部喷氨量调整不佳等现象。分析认为主要与其布置形式和安装位置有关。提出了氨喷射系统优化改造的必要性,并通过数值模拟手段对原方案进行了优化设计,将喷氨格栅从水平烟道移至竖直烟道。该改造方案具有投资少、检修维护方便等优点,改造后可有效防止喷嘴堵塞,增强喷氨有效性,延长催化剂寿命。

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Abstract:

In the operation of ultralow emission of a 300MW unit, the phenomenon of partial nozzle clogging and properly adjusted ammonia injection of partial reactor’s section exists chronically. The analysis is mainly concerned with its layout and location. In this paper. The necessity of optimizing the ammonia injection system is put forward and the original scheme is optimized and modified by means of numerical simulation. Ammonia injection grid is moved from the horizontal flue to the vertical flue. The modified plan has the advantages of less investment and convenient maintenance, etc. It is expected to effectively prevent nozzle clogging, enhance ammonia injection effectiveness and prolong catalyst life.

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