燃煤电厂烟气SCR脱硝成本分析与优化

Analysis and Optimization for Operating Costs of Gas SCR DeNOx in Coal-Fired Power Plants

针对中国现有机组烟气SCR脱硝成本较高的问题,研究了机组类型、机组容量、脱硝效率、还原剂类型、入口NO x浓度、脱硝厂用电率等因素对烟气SCR脱硝平均成本的影响,同时通过分析SCR脱硝成本的组成得到运行成本和财务成本是脱硝成本的主要组成部分,进而提出降低脱硝成本的还原剂耗量优化、吹灰系统优化、催化剂优化等措施,为烟气SCR脱硝系统的经济、稳定运行提供指导。

In order to lower the high DeNOx costs of the existing coal-fired power generating units,the effects of various factors on the average SCR DeNOx costs are studied,including the unit type,unit capacity,denitrification efficiency,reductant type,inlet NOx concentration and the power consumption rate of denitrification,etc.Through the analysis on the composition of the SCR DeNOx cost,it is concluded that the operating costs and the financial costs are the major parts of the DeNOx cost.Therefore,optimizations on reductant consumption,soot blowing system and catalyst are proposed to reduce the DeNOx costs,so as to lay solid foundation for the economic and stable operation of the flue gas SCR system.