超低排放脱硝喷氨格栅优化策略

Optimization Strategies for Ultra-low Emission Ammonia Injection Grids

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、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NOx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。

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 simulation-based 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.