超超临界燃煤机组脱硝系统喷氨优化研究

Optimization Research on Ammonia Injection of Denitration System of Ultra-supercritical Coal-fired Unit

1050 MW超超临界燃煤机组脱硝系统喷氨格栅喷氨优化项目针对脱硝系统稳定运行而专门设计,是集成系统自动化优化整定、系统在线寻优和优化控制的一体化解决方案。通过1050 MW超超临界燃煤机组脱硝系统喷氨格栅喷氨优化研究,开发了氮氧化物快速网格法测量系统,为实时在线调整喷氨格栅提供了可靠保障;开发了选择性催化还原自适应混合模型,确保选择性催化还原喷氨格栅调门状态控制器的调节精度,克服煤种变化等不确定因素对状态控制器的干扰,从本质上提高脱硝系统的可控性,并可适应烟道流场和浓度场的不确定性。

The ammonia injection optimization project of denitration system ammonia injection grid of 1050 MW ultra-supercritical coal-fired unit exclusively designed for stable operation of denitration system,offers integrated solution comprised of system automation optimization tuning,system online optimizing and optimization control.Through the ammonia injection optimization research on denitration system ammonia injection grid of 1050 MW ultra-supercritical coal-fired unit,nitrogen oxide measurement system based on fast grid method was developed to provide guarantee for real-time online adjustment of ammonia injection grid.Meantime,selective catalytic reduction adaptive mixture model was developed to ensure the adjustment accuracy of governor valve state controller of selective catalytic reduction ammonia injection grid,to overcome the interference to state controller caused by uncertain factors such as change of coal type,to essentially improve the controllability of denitration system and to adapt to the uncertainties of flue flow field and concentration field.