Opti-Flow~(TM) Low NO_x Burner Performance Firing a Variety of Bituminous and Sub-bituminous Coals

摘要

Since its formation in 1996 and its first low NO_x burner retrofits in May 1997, Advanced Burner Technologies has retrofitted over 7,000 MW of large utility boilers with our Opti-Flow~(TM) low NO_x burner. The fuels ranged from eastern high sulfur and western low sulfur bituminous to Powder River Basin sub-bituminous coals. This paper summarizes several experiences where NO_x levels below 0.4 lb/10~6 Btu firing bituminous coals and below 0.25 firing PRB are attained. Some boilers have also been equipped with ABT's overfire air system where significantly lower NO_x levels are achieved without deep staging the burners.