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Case Studies

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Paper Mill Case Study

Power House Boiler

NOx Controls Used: IFGR

This paper mill client was required to reduce their natural gas and No. 6 fuel oil NOx emissions by 50%. The boiler was a 450lb/hr steam Riley Stoker boiler with six burners. The furnace heat release rate was extremely high, with baseline NOx emissions exceeding 1.0 lb/mmbtu on both fuels. The Patented ETEC IFGR NOx Control system was installed from the base of the stack to the forced draft inlet, as shown in the figure below.The IFGR NOx Control system operation, designed to provide 20% flue gas recirculation flow, reduced the gas and oil fuel NOx emissions by 85% and 68%, respectively, as shown in the figures below.