CFB锅炉两级脱硫系统的技术经济性分析及优化

为了降低循环流化床（circulating fluidized bed，CFB）锅炉的SO₂排放以符合日益严格的排放标准，针对在CFB锅炉炉内石灰石脱硫与石灰石-石膏湿法烟气脱硫（flue gas desulfurization，FGD）装置的两级脱硫系统，依托某台已配置两级脱硫系统的300 MW CFB发电机组的设备投资、运行成本等数据，分析了SO₂排放限值、原煤含硫量、机组负荷、年有效运行时间和脱硫设备初投资对CFB-FGD两级强化脱硫系统经济性的影响，得出炉内外合理的脱硫份额方案。

Technical Economic Analysis and Optimization of Two-Stage Desulfurization System for CFB Boiler

To reduce the emissions of SO₂ from the circulating fluidized bed (CFB) boiler to meet the increasingly stringent emission standards, this paper focused on the two-stage desulfurization system including the limestone desulfurization in the furnace of CFB boiler and the wet limestone-gypsum flue gas desulfurization (FGD). Relying on the investment equipment and operating costs in a 300 MW CFB unit with two-stage desulfurization system, this paper analyzed the impact of SO₂ emission limits, sulfur content in coal, unit load, initial investment in desulfurization equipment and annual effective performance time on the economy of CFB-FGD two-stage intensified desulfurization system, finally obtained a reasonable scheme of desulfurization share.