첨가제 펠릿을 이용한 목재 펠릿보일러의 타르 감소와 열효율 분석
Tar Reduction and Thermal Efficiency Analysis of a Wood Pellet Boiler Using Catalyst Mixed Pellets
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Wood pellets are ‘carbon natural’ fuels that contribute to greenhouse gas reduction regulation. On the other hand, the tar, generated from woody biomass combustion, condenses and accumulates in the combustion chamber resulting in a reduction of heat transfer on the surface where heat exchange takes place, which decreases the thermal efficiency and equipment life span. To solve these problems, an additive acting as a catalyst for a reforming reaction was mixed with the pellets to reduce tar formation in combustion. For the experiment, 2% of dolomite, 2% of limestone and 1% mixture of dolomite and limestone were added as catalysts to the wood pellets. The experiments were conducted in the same external environment and a comparison of the thermal efficiency and reduction of tar of boiler containing the solid additive was carried out. As a result, the thermal efficiency of the additive pellets was increased by 1.09% and 0.36% for dolomite 2%, limestone 1% and dolomite 1%, respectively, compared to conventional wood pellets, and decreased by 0.46 for 2% lime stone. Although the thermal efficiency of the dolomite 2% additive pellets was the highest,pellets with 1% dolomite and 1% limestone produced the best result.
Abstract
Wood pellets are ‘carbon natural’ fuels that contribute to greenhouse gas reduction regulation. On the other hand, the tar, generated from woody biomass combustion, condenses and accumulates in the combustion chamber resulting in a reduction of heat transfer on the surface where heat exchange takes place, which decreases the thermal efficiency and equipment life span. To solve these problems, an additive acting as a catalyst for a reforming reaction was mixed with the pellets to reduce tar formation in combustion. For the experiment, 2% of dolomite, 2% of limestone and 1% mixture of dolomite and limestone were added as catalysts to the wood pellets. The experiments were conducted in the same external environment and a comparison of the thermal efficiency and reduction of tar of boiler containing the solid additive was carried out. As a result, the thermal efficiency of the additive pellets was increased by 1.09% and 0.36% for dolomite 2%, limestone 1% and dolomite 1%, respectively, compared to conventional wood pellets, and decreased by 0.46 for 2% lime stone. Although the thermal efficiency of the dolomite 2% additive pellets was the highest,pellets with 1% dolomite and 1% limestone produced the best result.
참고문헌 (15)
- Park, J.H., "Yearbook of Energy Statistics" (2017), Korea Energy Economics Institute
- Korea International Trade Association, "Book title", Korea International Trade Association, ~ (2015)
- "2014 Wood pellets statistics (based on end-2014)" (2015)[URL]
- Lee, J.A., "Productivity and cost analysis of whole-tree harvesting system", The Korea Institute of Forest Recreation Welfare Conference Book, pp.836~839 (2013)
- Sim, B.S., "Combustion characteristics of a wood pellet", Proceedings of the Korea Society of Mechanical Engineers (KSME) Conference, pp.3624~3629 (2010)
- Myrén, C., "Catalytic tar decomposition of biomass pyrolysis gas with a combination of dolomite and silica", Biomass and Bioenergy, 23(3), pp.217~227 (2002)
- Devi, L., "Catalytic decomposition of biomass tars: use of dolomite and untreated olivine", Renewable Energy, 30(4), pp.565~587 (2005)
- Kafle, S., "Tar fouling reduction in wood pellet boiler using additives and study the effects of additives on the characteristics of pellets", Eneryg, 129, pp.79~85 (2017)
- Euh, S. H., "(A)study on tar fouling mechanism to improve the combustion system efficiency", Ph.D., pp.2016
- Devi, L., "A review of the primary measures for tar elimination in biomass gasification processes", Biomass and Bioenergy, 24(2), pp.125~140 (2003)
- Devi, L., "Pretreated olivine as tar removal catalyst for biomass gasifiers: investigation using naphthalene as model biomass tar", Fuel Processing Technology, 86(6), pp.707~730 (2005)
- Lee, S.M., "Standard for quality of wood pellet", Korea Institute of Forestry, ~ (2017)
- 어승희, "목재펠릿 연소 시 발생하는 타르, 재, 클링커 생성 특성 분석 및 함수율 변화에 따른 목재펠릿보일러의 성능 연구", 에너지공학, 23(3), pp.211~220 (2014), 한국에너지학회
- Kang, S. B., "Performance characteristics of domestic wood pellet boilers", Proceedings of the Society of Air-conditioning and Refrigerating Engineers of Korea (SAREK) Conference, pp.900~903 (2011)
- Kang, S.B., "Performance Characteristics of Domestic Wood Pellet Boiler", Proceedings of the Society of Airconditioning and Refrigerating Engineers of Korea (SAREK) Conference, pp.3613~3617 (2010)