Development of advanced NO sub x control concepts for coal-fired utility boilers

• Main Authors: Evans, A., Newhall, J., England, G., Seeker, W. R.
• Other Authors: United States. Department of Energy.
• Format: Report
• Language: English
• Published: Energy and Environmental Research Corporation 1992
• Subjects: Staged Combustion; Boilers; Chemical Reactions; Sulfur Dioxide; Organic Compounds; Urea; Document Types; Oxides; Amides; Flue Gas; Chalcogenides; Oxidation; Gaseous Wastes; 20 Fossil-Fueled Power Plants; Wastes 200202* > Fossil-Fueled Power Plants > Waste Management > Noxious Gas & Particulate Emissions; Hydroxy Compounds; Nitrogen Dioxide; Progress Report; Nitrogen Compounds; Sulfur Compounds; Air Pollution Abatement; Thermochemical Processes; Alcohols; Oxygen Compounds; Nitrogen Oxides; Combustion; Sulfur Oxides; Carbonic Acid Derivatives; Organic Nitrogen Compounds; Pollution Abatement; Reduction; Methanol; Scrubbing; Carbonic acid
• Online Access: https://doi.org/10.2172/7074968; https://digital.library.unt.edu/ark:/67531/metadc1181443/

CombiNO{sub x} is a NO{sub x} reduction process which incorporates three different NO{sub x} control technologies: reburning, selective non-catalytic reduction (SNCR), and methanol injection. Gas reburning is a widely used technology that has been proven to reduce NO{sub x} up to 60% on full-scale applications. The specific goals of the CombiNO{sub x} project are: 70% NO{sub x} reduction at 20% of the cost of selective catalytic reduction; NO{sub x} levels at the stack of 60 ppm for ozone non-attainment areas; Demonstrate coal reburning; Identify all undesirable by-products of the process and their controlling parameters; Demonstrate 95% N0{sub 2} removal in a wet scrubber. Before integrating all three of CombiNO{sub x}'s technologies into a combined process, it is imperative that the chemistry of each individual process is well understood. Pilot-scale SNCR tests and the corresponding computer modeling were studied in detail and discussed in the previous quarterly report. This quarterly report will present the results obtained during the pilot-scale advanced reburning tests performed on EER's Boiler Simulation Facility (BSF). Since methanol injection is a relatively new NO{sub x} control technology, laboratory-scale tests were performed to better understand the conditions at which methanol is most effective. The experimental set-up and results from these tests will be discussed.