Abstract
Combustion experiments of two Chinese coals were conducted in a 50kWth circulating fluidized bed (CFB) combustor in air and O2/CO2 atmospheres, and the effects of atmosphere and O2 staging on combustion characteristics including temperature distribution profiles, combustion efficiency, gaseous pollutant emission and desulfurization efficiency were investigated. Results show that O2 enrichment in the atmosphere elevates the temperature level in the riser and improves the combustion efficiency. Without limestone addition, O2 enrichment in the atmosphere augments SO2 and NO emission and reduces CO emission. The desulfurization efficiency under higher O2 concentration is higher with the same Ca/S molar ratio in O2/CO2 atmosphere. O2 staging provides more operation flexibility for oxy-fuel CFB combustion. As O2 concentration in the primary gas increases, combustion efficiency and desulfurization efficiency are improved. O2 staging can reduce the NO emission to a large extent in O2/CO2 atmosphere.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
