Demonstration of NOx Emissions Below 0.15 lb/MBtu in a Cyclone Boiler Using In-Furnace NOx Control

Published By Fuel Tech

• By Marc A. Cremer, Andrew P. Chiodo, Bradley R. Adams, Craig Giesmann, Ken Stuckmeyer and Craig Giesmann, Ken Stuckmeyer
• Published January 2007
• 23 Page(s)

A four week testing program was recently completed to assess the ability of the combination of deep staging, Rich Reagent Injection (RRI), and Selective Noncatalytic Reduction (SNCR) to reduce NOx emissions below 0.15 lb/MBtu in a cyclone fired boiler. The host site for the tests was AmerenUE’s Sioux Unit 1, a 540 MW cyclone fired boiler located near St. Louis, MO. This layered approach to NOx reduction is termed the Advanced Layered Technology Approach (ALTA). Installed RRI and SNCR port locations were guided by computational fluid dynamics (CFD) based modeling conducted by REI. During the parametric testing, NOx emissions of 0.12 lb/MBtu were achieved consistently from OFA- only baseline NOx emissions of 0.25 lb/MBtu or less, when firing the typical 80/20 fuel blend of Powder River Basin (PRB) and Illinois #6 coals.