超低排放脱硝喷氨格栅优化策略
石磊¹，潘栋¹，孙少波²，杨晓刚¹，李淑宏¹，吴涛¹，贾子秀¹
（1.西安热工研究院有限公司，陕西 西安 710054；2.国能神福（石狮） 发电有限公司，福建 泉州 362000）
摘要： 超低排放改造后脱硝系统普遍出现氨逃逸大、空预器堵塞严重、喷氨自动无法投入等问题。通过仿真设计优
化尧喷氨格栅调整、精准喷氨改造等优化手段，能改善催化剂入口氨氮摩尔比，从而保证NO_x减排系统的稳定运行。喷
氨格栅优化能实现对氨逃逸的控制，可以减少还原剂耗量和降低引风机电耗，具有明显的经济性。
关键词： 喷氨格栅；SCR 脱硝；精准喷氨；氨逃逸
中图分类号： X773      文献标志码： A      文章编号： 2095-0802-(2023)12-0068-04
Optimization Strategies for Ultra-low Emission Ammonia Injection Grids
SHI Lei¹, PAN Dong¹, SUN Shaobo², YANG Xiaogang¹, LI Shuhong¹, WU Tao¹, JIA Zixiu¹
(1. Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710054, Shaanxi, China; 2. Guoneng Shenfu (Shishi) Power
Generation Co., Ltd., Quanzhou 362000, Fujian, China)
Abstract: After the ultra-low emission retrofit, common issues such as significant ammonia escape, severe air preheater blockage
and automatic ammonia injection failure have emerged in the denitration system. By employing techniques such as simulationbased
design optimization, adjustments to the ammonia grid and precise retrofitting of ammonia injection, the catalyst inlet
ammonia-nitrogen molar ratio can be improved to solve the above problems, so as to ensure the stable operation of the NOx
emission reduction system. The optimization of ammonia injection grids can control ammonia escape, and reduce the consumption
of reducing agents and the power consumption of the induced draft fan, offering significant economic benefits.

Key words: ammonia injection grid; SCR denitrification; precise ammonia injection; ammonia escape