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http://dx.doi.org/10.7316/KHNES.2019.30.5.436

Characteristics of Co-Combustion of Wood Pellet with Sub-Bituminus Coal in A Pilot CFB Combustor  

KIM, DONG WON (KEPCO Research Institute)
PARK, KYEONG IL (KEPCO Research Institute)
LEE, JONG MIN (KEPCO Research Institute)
BAE, YONG CHAE (KEPCO Research Institute)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.30, no.5, 2019 , pp. 436-447 More about this Journal
Abstract
The circulating fluidized bed boiler has an advantage that can burn a variety of fuels from low-grade fuel to coal. In this study, for the design of a circulating fluidized bed boiler using wood pellets, a circulating fluidized bed combustion test device using no external heater was manufactured and used. According to the increase of co-combustion rate with wood pellet, combustion fraction and heat flux by combustor height were measured and pollutant emission characteristics were analyzed. In terms of combustibility, the effect on primary and secondary air ratio were also studied. In addition, as a result of analysis of the effect of corrosive nanoparticles on the combustion of coal with wood pellets, it was confirmed that coal is mostly composed of Ca and S, whereas wood pellets are mostly composed of K, Cl, and Na.
Keywords
Circulating fluidized bed; Wood pellet; Combustion fraction; Heat flux; Co-combustion;
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