Abstract
The Southern Energy, Inc. (SEI) Birchwood Power Facility, a cogeneration unit, represents the first application worldwide of the TFS 2000{trademark} firing system and selective catalytic reduction (SCR). The installation of these state-of-the-art NOx control technologies was necessary to meet strict Commonwealth of Virginia environmental regulations requiring a 0.10 lbs/10{sup 6} Btu (0.043 g/MJ) NOx emission rate based upon a 30-day rolling average. The plant successfully completed all performance and emission testing on September 24, 1996. Commercial operation began November 14, 1996. Stack NOx emission rates are consistently maintained below 0.10 lbs/10{sup 6} Btu. The paper describes the integration of both in-furnace and post-combustion NOx control technologies into the overall boiler design. Operational data depicting boiler outlet NOx, stack NOx and loss on ignition (LOI) are presented across the design load range from 32% to 100% boiler output. The description, arrangement, design parameters and operation of the NOx control equipment are discussed. Novel design features include a split economizer, an air heater suitable for ammonia applications, Dynamic{trademark} classifiers, and a multi-zone secondary air flow control system utilized for the TFS 2000{trademark} firing system.
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