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

• Main Authors: Evans, A., Newhall, J., England, G., Seeker, W.R.
• Language: unknown
• Published: 2008
• Subjects: 20 FOSSIL-FUELED POWER PLANTS; FLUE GAS; AIR POLLUTION ABATEMENT; NITROGEN OXIDES; BOILERS; METHANOL; NITROGEN DIOXIDE; PROGRESS REPORT; REDUCTION; SCRUBBING; STAGED COMBUSTION; SULFUR DIOXIDE; UREA; ALCOHOLS; AMIDES; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHEMICAL REACTIONS; COMBUSTION; DOCUMENT TYPES; GASEOUS WASTES; HYDROXY COMPOUNDS; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDATION; OXIDES; OXYGEN COMPOUNDS; POLLUTION ABATEMENT; SULFUR COMPOUNDS; SULFUR OXIDES; THERMOCHEMICAL PROCESSES; WASTES; Carbonic acid
• Online Access: http://www.osti.gov/servlets/purl/7074968; https://www.osti.gov/biblio/7074968; https://doi.org/10.2172/7074968

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.