Browse > Article
http://dx.doi.org/10.5658/WOOD.2018.46.5.597

Analysis of Emission Characteristics and Emission Factors of Carbon Monoxide and Nitrogen Oxide Emitted from Wood Pellet Combustion in Industrial Wood Pellet Boilers Supplied According to the Subsidy Program of Korea Forest Service  

Kang, Sea Byul (Energy Network Laboratory, Korea Institute of Energy Research)
Choi, Kyu Sung (Energy Network Laboratory, Korea Institute of Energy Research)
Lee, Hyun Hee (Energy Network Laboratory, Korea Institute of Energy Research)
Han, Gyu-Seong (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.46, no.5, 2018 , pp. 597-609 More about this Journal
Abstract
Korea Forest Service has supplied 76 industrial wood pellet boilers from 2011 to 2015 through subsidy programs. Since carbon monoxide (CO) and nitrogen oxides ($NO_x$) generated during boiler combustion are substances that lead to death in the case of acute poisoning, it is very important to reduce emissions. Therefore, the CO and $NO_x$ emission values of 63 boilers excluding the hot air blower and some boilers initially supplied were analyzed. The emission factor was also calculated from the measured exhaust gas concentration (based on exhaust gas $O_2$ concentration of 12%). The average value of CO emitted from industrial wood pellet boilers was 49 ppm and it was confirmed that the CO concentration was decreasing as the years passed. The emission factor of CO was 0.73 g/kg. The average value of $NO_x$ emitted from industrial wood pellet boilers was 67 ppm and the emission factor of $NO_x$ was 1.63 g/kg. Unlike CO, there was no tendency to decrease according to the installation year. Both CO and $NO_x$ measurements met the limits of the Ministry of Environment. These $NO_x$ emission factors were compared with the $NO_x$ emission factors produced by certified low $NO_x$ burners. The $NO_x$ emission factor of industrial wood pellet boilers was about 1.9 times that of certified low $NO_x$ LNG combustors and about 0.92 times that of coal combustion.
Keywords
emission; carbon monoxide; nitrogen oxide; industrial wood pellet boiler;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Yang, I., Chae, H.-G., Han, G.-S. 2017. Effect of bark and drying waste liquor of Larix kaempferi used as an additive on the fuel characteristics of wood pellet fabricated with Rigida pine and Quercus mongolica sawdust, Journal of the Korean Wood Science and Technology 45(3): 258-267.   DOI
2 Kang, K., Song, J., Yoon, M., Lee, B., Kim, S., Chang, Y., Jeon, C. 2009. A Numerical Study on the Effects of SOFA on $NO_x$ Emission Reduction in 500MW Class Sub-bituminous Coal-Fired Boiler. of the Korean Society of Mechanical Engineers - B 33(11): 858-868.   DOI
3 Kang, S.B., Oh, H.Y., Kim, J.J., Choi, K.S. 2017. Characteristics of spent coffee ground as a fuel and combustion test in a small boiler (6.5kW). Renewable Energy 113: 1208-1214.   DOI
4 Kim, K.H. 2017. Wood Pellet - Renewable energy? Ultra fine dust 20 times, http://news.kbs.co.kr/news/view.do?ncd=3559653, Seoul, Korea.
5 Kim, S.H., Yang, I., Han, G.-S. 2015. Effect of sawdust moisture content and particle size on the fuel characteristics of wood pellet fabricated with Quercus mongolica, Pinus densiflora and Larix kaempferi Sawdust. Journal of the Korean Wood Science and Technology 43(6): 757-767.   DOI
6 Korea Forest Service. 2013. Construction Inspection Standards for Industrial Wood Pellet Boilers. Daejeon, Korea.
7 Korea Forest Service. 2015. Industrial Wood Pellet Boiler Subsidy Standards, Daejeon, Korea.
8 Korea Standards and Certifications, 2014, Land Boilers - Heat Balancing (KS B 6205).
9 Ministry of Environment. 2017. Clean Air Conservation Act, ME, Sejong, Korea.