Plant Journal (플랜트 저널)

Korea Institute of Plane Engineering and Construction (한국플랜트학회)
권호 표지

Effect of Biomass Co-firing Ratio on Operating Factors of Pulverizer in 500 MW Coal-fired Power Plant

500 MW 석탄화력 발전소에서 바이오매스 혼소율이 미분기 운전인자에 미치는 영향

  • Geum, Jun Ho (Department of Power Enginerring, Hanyang University) ;
  • Moon, Seung-Jae (Department of Mechanical Engineering, Hanyang University)
  • 금준호 (한양대학교 파워엔지니어링공학과) ;
  • 문승재 (한양대학교 기계공학부)
  • Published : 2022.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

As the proportion of renewable energy generation is expected to increase, public power generation businesses need to actively consider implementing the expansion of biomass mixing, In this study, the biomass co-firing rate is being changed from 0wt.% to 5.0wt.% at 500MW coal-fired power plant, measuring the major operation characteristics of the pulverizer. First, the composition analysis and grinding characteristics of lignocelluosic biomass were examined, and the effect of volume increase on dirrerential bowl pressure difference, motor current, coal spillage, outlet temperature, and internal fire count was analyzed. As the co-firing rate increased, it was confirmed that the difference in the differential bowl pressure, motor current, and coal spillage treated increased, and the outlet temperature was minimal. The number of internal fires is difficult to find a clear correlation, but it has been confirmed that it is highly likely to occur in combination with other driving factors.

신재생에너지 발전 비중 확대가 예상됨에 따라 공공 발전사업자들은 바이오매스 혼소의 확대 시행을 적극적으로 검토해야 할 필요가 있다. 본 연구에서는 500MW 석탄화력에서 바이오매스 혼소율을 0wt.%에서 5.0wt.%까지 변화하며 미분기 주요 운전 특성을 측정하였다. 먼저, 목질계 바이오매스에 대한 구성성분 분석과 분쇄 특성을 알아보았고, 혼합연료의 부피 증가가 미분기 보울 압력 차이, 모터 전류, 이물질 처리횟수, 출구 온도, 내부 화재횟수에 미치는 영향을 분석하였다. 혼소율 증가에 따라 미분기 보울 압력 차이와 모터 전류, 이물질 처리횟수는 상승함을 확인하였고, 출구 온도는 상승 폭이 미미하였다. 내부 화재횟수는 명확한 상관관계를 찾기 힘드나, 다른 운전인자와 결합하여 발생할 가능성이 크다는 것을 확인하였다.

Keywords

References

  1. MOTIE, 2019, The 3rd Energy Master Plan
  2. Korea Energy Agency, 2020, Renewable Energy Policy
  3. MOTIE, 2018~2020, Announcement of mandatory supply by supply duty
  4. Sunghwan Oh, 2015, A study on the change of the pulverizer operating statein Co-combustion with coal and wood pellet by the pulverized coal fired power plant, Doctoral dissertation, Gyeongsang University
  5. Chunhwan Lee, 2018, Effect of wood pellets mixing on the pulverizer operation in the 800MW coal fired power plant, Doctoral dissertation, Hanyang University
  6. Yeongho Hwang, 2015, In-furnace Combustion and Emission Gas Characteristics of Coal and Woodpellet Co-firing in the airstaged Pulverized Coal Combustion Furnace, Doctoral dissertation, Pusan University
  7. Tae-Young Mun, Zelalem Tumsa Tefera, Uendo Lee, Jeung Woo Lee and Won Yang, 2014, Evaluation of Plant Performance during Biomass Co-firing in Pulverized Coal Power Plant, J. Korean Soc. Combust, 19(3), pp.8-17
  8. Tillman, D.A., 2000. Biomass cofiring: the technology, the experience, the combustion consequences, Biomass and bioenergy, 19(6), pp.365-384 https://doi.org/10.1016/S0961-9534(00)00049-0
  9. Agbor, E., Zhang, X., & Kumar, A., 2014, A review of biomass co-firing in North America. Renewable and Sustainable Energy Reviews, 40, pp.930-943 https://doi.org/10.1016/j.rser.2014.07.195
  10. Bergman, P.C., Boersma, A.R., Zwart, R.W.R. and Kiel, J.H.A., 2005, Torrefaction for biomass co-firing in existing coal-fired power stations, Energy Research Centre of the Netherlands, ECN-C-05-013
  11. Kobayashi, N., Guilin, P., Kobayashi, J., Hatano, S., Itaya, Y. and Mori, S., 2008, A new pulverized biomass utilization technology, Powder technology, 180(3), pp.272-283 https://doi.org/10.1016/j.powtec.2007.02.041
  12. The International Renewable Energy Agency, 2013, Biomass Cofiring - Technology Brief, IEA-ETSAP and IRENAⓒ Technology Brief E21
  13. KPLI, 2014, Fuel management practice, KPLI-Renewal-2, pp.102
  14. Sluiter, A., Hames, B., Ruiz, R., Scarlata, C., Sluiter, J., Templeton, D. and Crocker, D., 2008, Determination of structural carbohydrates and lignin in biomass, Laboratory analytical procedure, 1617, pp.1-16
  15. Demirbas, A., 2002, Relationships between heating value and lignin, moisture, ash and extractive contents of biomass fuels, Energy exploration & exploitation, 20(1), pp.105-111 https://doi.org/10.1260/014459802760170420
  16. Manouchehrinejad, Maryam, Ian van Giesen, and Sudhagar Mani, 2018, Grindability of torrefied wood chips and wood pellets, Fuel processing technology, 182, pp.45-55 https://doi.org/10.1016/j.fuproc.2018.10.015
  17. KPLI, 2016, Boiler operation practice, KPLIRenewal-3, pp.176
  18. Flores, Romeo M., 2013, Coal and coalbed gas: fueling the future. pp.25
  19. Tumuluru, Jaya Shankar., 2016, Specific energy consumption and quality of wood pellets produced using high-moisture lodgepole pine grind in a flat die pellet mill, Chemical engineering research and design, 110, pp.82-97 https://doi.org/10.1016/j.cherd.2016.04.007
  20. Zalosh, Robert G, 1987, Review of coal pulverizer fire and explosion incidents., Industrial Dust Explosions, ASTM International, 1987.